China-Africa relations maintained their upward trajectory in 2024,with new plans for future cooperation taking shape.Chinese President Xi Jinping described the China-Africa partnership as being at its best in history....China-Africa relations maintained their upward trajectory in 2024,with new plans for future cooperation taking shape.Chinese President Xi Jinping described the China-Africa partnership as being at its best in history.The Beijing Summit of the Forum on China-Africa Cooperation(FOCAC),held in September 2024,elevated bilateral ties between China and African countries with diplomatic relations with China to a strategic level.It also redefined China-Africa relations as an“all-weather China-Africa community with a shared future for the new era.”This signifies that China and Africa will remain steadfast friends and close development partners,regardless of changes in the international landscape.展开更多
To meet the requirements of electromagnetic(EM)theory and applied physics,this study presents an overview of the state-of-the-art research on obtaining the EM properties of media and points out potential solutions tha...To meet the requirements of electromagnetic(EM)theory and applied physics,this study presents an overview of the state-of-the-art research on obtaining the EM properties of media and points out potential solutions that can break through the bottlenecks of current methods.Firstly,based on the survey of three mainstream approaches for acquiring EM properties of media,we identify the difficulties when implementing them in realistic environments.With a focus on addressing these problems and challenges,we propose a novel paradigm for obtaining the EM properties of multi-type media in realistic environments.Particularly,within this paradigm,we describe the implementation approach of the key technology,namely“multipath extraction using heterogeneous wave propagation data in multi-spectrum cases”.Finally,the latest measurement and simulation results show that the EM properties of multi-type media in realistic environments can be precisely and efficiently acquired by the methodology proposed in this study.展开更多
This article presents the history and challenges of patient graduation,positioning it as a means of supporting patient engagement and user involvement in the healthcare system.A set of laws related to patient rights a...This article presents the history and challenges of patient graduation,positioning it as a means of supporting patient engagement and user involvement in the healthcare system.A set of laws related to patient rights and healthcare quality allows for the integration of patients into the healthcare system,but they face the unpreparedness of institutions in this new field of practices.Patient graduation requires transformations in the modes of reception and financing of universities,as well as in the pedagogical methods that need to be tailored to the reception and training of individuals in vulnerable situations.The article provides a detailed description of the example,history,and effects of the creation of the first open diploma in oncology for patient partners in France and concludes by emphasizing the need for concrete mechanisms for social recognition of user engagement in the healthcare system.展开更多
AIM To investigate alterations in the fecal microbiome using 16 S r RNA amplicon sequencing in couples in the same cohabitation environment.METHODS Fecal samples were collected from eight ulcerative colitis(UC) patien...AIM To investigate alterations in the fecal microbiome using 16 S r RNA amplicon sequencing in couples in the same cohabitation environment.METHODS Fecal samples were collected from eight ulcerative colitis(UC) patients and their healthy partners at Lishui People's Hospital, Zhejiang Province, China. DNA was extracted and the variable regions V3 and V4 of the 16 S r RNA genes were PCR amplified using a two-step protocol. Clear reads were clustered into operational taxonomic units(OTUs) at the 97% sequence similarity level using UCLUST v1.2.22. The Wilcoxon rank-sumtest(R v3.1.2) was used to compare inter-individual differences. Differences with a P value < 0.05 were considered statistically significant.RESULTS Fecal microbial communities were more similar among UC patients than their healthy partners(P = 0.024). UC individuals had a lower relative abundance of bacteria belonging to the Firmicutes, especially Blautia, Clostridium, Coprococcus and Roseburia(P < 0.05). Microbiota dysbiosis was detected in UC patients and their healthy partners. Relevant genera included Akkermansiam, Bacteroides, Escherichia, Lactobacillales, Klebsiella and Parabacteroides. The enriched pathways in fecal samples of UC patients were related to lipid and nucleotide metabolism. Additionally, the pathways involved in membrane transport and metabolism of cofactors and vitamins were more abundant in the healthy partners.CONCLUSION Our results suggested that the microbial composition might be affected in healthy partners cohabiting with UC patients, especially in terms of microbiota dysbiosis.展开更多
We investigated the relationships between the existence of exercise partners and exercise habits among Japanese university students. Subjects were 650 university students (539 males, 111 females;age range 18 - 27 year...We investigated the relationships between the existence of exercise partners and exercise habits among Japanese university students. Subjects were 650 university students (539 males, 111 females;age range 18 - 27 years). They responded to an anonymous questionnaire asking about current and past exercise habits, preference for exercise (i.e., like or dislike of exercise), and the existence of one or more exercise partners. In the results, the existence of exercise partners had a significant association with exercise habits at each school stage in both genders. Exercise preference had a significant association with exercise habits during high school in both genders;during primary and middle school, however, this association was significant only in males. In males, exercise habits and the preference for exercising in high school affected current exercise habits. In females, only exercise habits in high school affected current exercise habits. Our results suggest that the existence of one or more exercise partners is important for the practice of exercise, as well as the preference for exercise. They also suggest that continuity of exercise habits is different between males and females.展开更多
The time dependent vehicle routing problem with time windows(TDVRPTW) is considered. A multi-type ant system(MTAS) algorithm hybridized with the ant colony system(ACS)and the max-min ant system(MMAS) algorithm...The time dependent vehicle routing problem with time windows(TDVRPTW) is considered. A multi-type ant system(MTAS) algorithm hybridized with the ant colony system(ACS)and the max-min ant system(MMAS) algorithms is proposed. This combination absorbs the merits of the two algorithms in solutions construction and optimization separately. In order to improve the efficiency of the insertion procedure, a nearest neighbor selection(NNS) mechanism, an insertion local search procedure and a local optimization procedure are specified in detail. And in order to find a balance between good scouting performance and fast convergence rate, an adaptive pheromone updating strategy is proposed in the MTAS. Computational results confirm the MTAS algorithm's good performance with all these strategies on classic vehicle routing problem with time windows(VRPTW) benchmark instances and the TDVRPTW instances, and some better results especially for the number of vehicles and travel times of the best solutions are obtained in comparison with the previous research.展开更多
Estimation of lateral displacement and acceleration responses is essential to assess safety and serviceability of high-rise buildings under dynamic loadings including earthquake excitations. However, the measurement i...Estimation of lateral displacement and acceleration responses is essential to assess safety and serviceability of high-rise buildings under dynamic loadings including earthquake excitations. However, the measurement information from the limited number of sensors installed in a building structure is often insufficient for the complete structural performance assessment. An integrated multi-type sensor placement and response reconstruction method has thus been proposed by the authors to tackle this problem. To validate the feasibility and effectiveness of the proposed method, an experimental investigation using a cantilever beam with multi-type sensors is performed and reported in this paper. The experimental setup is first introduced. The finite element modelling and model updating of the cantilever beam are then performed. The optimal sensor placement for the best response reconstruction is determined by the proposed method based on the updated FE model of the beam. After the sensors are installed on the physical cantilever beam, a number of experiments are carried out. The responses at key locations are reconstructed and compared with the measured ones. The reconstructed responses achieve a good match with the measured ones, manifesting the feasibility and effectiveness of the proposed method. Besides, the proposed method is also examined for the cases of different excitations and unknown excitation, and the results prove the proposed method to be robust and effective. The superiority of the optimized sensor placement scheme is finally demonstrated through comparison with two other different sensor placement schemes: the accelerometer-only scheme and non-optimal sensor placement scheme. The proposed method can be applied to high-rise buildings for seismic performance assessment.展开更多
User generated content,e.g.,from YouTube,the most popular online video sharing site,is one of the major sources of today's big data and it is crucial to understand their inherent characteristics.Recently,YouTube h...User generated content,e.g.,from YouTube,the most popular online video sharing site,is one of the major sources of today's big data and it is crucial to understand their inherent characteristics.Recently,YouTube has started working with content providers(known as YouTube partners) to promote the users' watching and sharing activities.The substantial benefit is to further augment its service and monetize more videos,which is crucial to both YouTube and its partners,as well as to other providers of relevant services.In this paper,our main contribution is to analyze the massive amounts of video data from a YouTube partner's view.We make effective use of Insight,a new analytics service of YouTube that offers simple data analysis for partners.To provide the practical guidance from the raw Insight data,we enable more complex investigations for the inherent features that affect the popularity of the videos.Our findings facilitate YouTube partners to re-design current video publishing strategies,having more opportunities to attract more views.展开更多
Objective: To investigate the transmission ratio andepidemiology of Chlamydia trachomatis (Ct) andUreaplasma urealyticum (Uu) between regular sexualpartners. Methods: We collected secretion specimens of geni-tourinary...Objective: To investigate the transmission ratio andepidemiology of Chlamydia trachomatis (Ct) andUreaplasma urealyticum (Uu) between regular sexualpartners. Methods: We collected secretion specimens of geni-tourinary tract from sexual partners who attended ourclinic during the period from May 1, 1999 to May 31,2000 and then detected Ct and Uu in the specimens. Results: The inconsistent rate of Ct and Uu infectedbetween sexual partners was 59.22% and 38.92%respectively. There were no correlations between pa-tients' age and the inconsistent rate of Ct and Uu in-fected (P>0.05). The most common inconsistency be-tween regular partners was seen in man with Ct infec-tion while in female with Uu infection; and in manwith concurrent infection of Ct while in female onlywith Uu; or in man with Ct infection while in female noCt and Uu were detected. Conclusion: The sexual transmitting ability of Ctand Uu is not as active as we have expected.展开更多
The current study examined the relationship between perceived messages about the bodies of adult men from their sexual partners and the actual body image of these men. Interviews were conducted among 38 middle-aged me...The current study examined the relationship between perceived messages about the bodies of adult men from their sexual partners and the actual body image of these men. Interviews were conducted among 38 middle-aged men. Feedback from partners was generally complimentary, and the men were generally positive about their body image. Partners were seen to be more focused on a healthy body rather than a physically attractive body. The implications of these findings for better understanding the social influence on adult men to obtain a healthy body weight are discussed.展开更多
The three levels optimizing strategy is put forward for the networked manufacturing resources optimizing configuration, namely, the optimizing of a logical manufacturing process, the optimizing of simulation-based int...The three levels optimizing strategy is put forward for the networked manufacturing resources optimizing configuration, namely, the optimizing of a logical manufacturing process, the optimizing of simulation-based integration of process planning and scheduling, and the optimizing of networked production scheduling. Then, the web services-based architecture of networked manufacturing resources optimizing configuration is brought forward. Finally, the key algorithm of the networked manufacturing resources optimizing configuration is discussed, namely, the two phases manufacturing partners selection method, which including the group technology-based manufacturing resources pre-configuration and the genetic algorithm-based executable manufacturing process optimizing.展开更多
Background: Partners of cancer patients are at elevated risk of experiencing psychological distress. Psychological distress is known to be countered by the protective factor, resilience. The relationship between psych...Background: Partners of cancer patients are at elevated risk of experiencing psychological distress. Psychological distress is known to be countered by the protective factor, resilience. The relationship between psychological distress and resilience among partners of cancer patients remains to be examined by quantitative studies. We aimed to investigate the association between psychological distress, and resilience and cancer-related psychological experience among partners of cancer patients receiving outpatient chemotherapy. Methods: Spouses and significant others of cancer patients were consecutively recruited into our cross-sectional study. The primary outcome was psychological distress, as assessed by the Hospital Anxiety and Depression Scale. The primary explanatory variables were resilience, as assessed by the short Japanese version of the Resilience Scale, and cancer-related psychological experience. Traumatic stress was assessed by the Japanese-language version of the Impact of Event Scale-Revised, while perception of caregiving burden and patients’ symptoms, and psychological support needs were assessed by single-item questions. To examine the association between psychological distress, and resilience and partners’ psychological experience, hierarchical multiple regression analysis was applied. Results: Psychological distress was evident in 33 of 109 partners, (30.3%, 95% confidence interval, 21.5 - 39.1). After adjusting for potential confounders, hierarchical multiple regression analysis showed the main effect of resilience. In the final step, while resilience was not found to be significant, psychological distress was observed to be positively associated with traumatic stress and perceived caregiving burden (β = 0.64, p β = 0.22, p Conclusions: The protective effect of resilience on partners’ psychological distress is moderated by traumatic stress and perceived caregiving burden during patients’ chemotherapy. The findings of this study suggest that a systematic way of providing appropriate psychological service to appropriate partners of cancer patients is required.展开更多
Globally, research indicates that monogamous married women living in slums are at heightened risk of HIV men’s risky sexual behaviour. Hence, to reduce the risk of HIV transmission, there is need to understand the nu...Globally, research indicates that monogamous married women living in slums are at heightened risk of HIV men’s risky sexual behaviour. Hence, to reduce the risk of HIV transmission, there is need to understand the number, nature and variation in transition of sexual partners of men in living in slums. This paper uses India’s National Family Health Survey-3 data to estimate the variation in the type of sexual partners among sexually active men age 15 - 54 with more than one sexual partner in last 12 months prior to the survey in eight slums?of India. Among sexually active men, 1.3 percent reported having more than one sexual partner in the last 12 months prior to the survey. Men who are more likely to have two or more partners are those who are young, especially below age 25 years, never married, educated up to 5 years, and from middle class. There is a higher increase in the probability of sex with spouse from second last to the last sexual partner in non-slum areas than slum areas. However, in case of transition from other friends/relatives and female sex workers to spousal partners, there is a major decline in probability among non-slum men than slum men. These transitions are extremely important from the perspective of curbing the spread of HIV epidemic, especially in situations where women lack control over their own sexuality and seldom use condom in marital sex. Therefore, strategies focused in slums should either consider reducing men’s risky sexual behaviour or build capacities of women to negotiate safe sex in marital relationships or consider a combination of both.展开更多
Reducing disparities in STI/HIV rates for young heterosexual African-American women in the US is a public health priority. Although several strategies can reduce risk, some sexually experienced young women are choosin...Reducing disparities in STI/HIV rates for young heterosexual African-American women in the US is a public health priority. Although several strategies can reduce risk, some sexually experienced young women are choosing to abstain from sex for various reasons and periods of time following sexual debut, a practice known as secondary abstinence. However, others who desire to practice secondary abstinence find it difficult to do so. This qualitative study explored barriers that explained the dissonance between interest in secondary abstinence and continued sexual activity. In-depth interviews were conducted with 20 sexually-experienced African-American adolescent females, ages 18 - 23, who expressed interest in secondary abstinence. Partner-related barriers that created power imbalances presented the greatest challenges to becoming or remaining abstinent. Findings suggest that teaching young women how to recognize characteristics of healthy and unhealthy relationships, identify power imbalances, communicate assertively and develop positive coping skills can empower young women to build healthier relationships with their partners.展开更多
Mg-3Al-1Zn(AZ31)sheets were produced by transverse gradient extrusion(TGE)process.The flow behavior and dynamic recrystallization during extrusion were systematically analyzed.The microstructures,textures,and mechanic...Mg-3Al-1Zn(AZ31)sheets were produced by transverse gradient extrusion(TGE)process.The flow behavior and dynamic recrystallization during extrusion were systematically analyzed.The microstructures,textures,and mechanical behavior of extruded AZ31 sheet were also analyzed and compared with conventional extruded(CE)sheet.The results showed that fine grain structure and multi-type unique textures were formed in TGE sheet because of the generation of extra flow velocity along transverse direction(TD)and flow velocity gradient along extrusion direction(ED)during extrusion.The basal poles gradually deviated away normal direction(ND)from edge to center of the TGE sheet along TD,and the largest inclination angle at center region reached around 65°.Furthermore,the basal poles inclined from ED to TD 40°-63°,except for the center region of TGE sheet.The TGE sheet presented higher ductility and strain hardening exponent(n-value),but lower yield strength and Lankford value(r-value)in comparison with the CE sheet.Both the basal<a>slip and tensile twins were easy to be activated during deformation,and the largest elongation of 41%and the lowest yield strength of 86.5 MPa were obtained for the ED-center sample in the TGE sheet.展开更多
Sliding wear tests of chilled cast iron tappet-disc and cam-ball tribo-partners were conducted by using ball on disc testing device. Magnetron sputtering CrTiAlN hard coating and Graphite like carbon (GLC) solid lubri...Sliding wear tests of chilled cast iron tappet-disc and cam-ball tribo-partners were conducted by using ball on disc testing device. Magnetron sputtering CrTiAlN hard coating and Graphite like carbon (GLC) solid lubricant coatings were applied on either one or both of the contact surfaces on tribo-partners. Ball crater device and scanning electron microscope were used to investigate surface wear of rubbed track on disc and wear scar on ball. The sliding performances of tribo-partners were evaluated in terms of coefficient of friction at sliding surfaces and specific wear rate (SWR) on both of the rubbed surfaces under specific test conditions. All test results showed that GLC solid lubricant coating on both surfaces of tappet-disc and cam-ball was the best option to allow this tribo-partners having high performance in terms of sliding under high load with low coefficient of friction and low SWR. The advantage of using GLC solid lubricant coating is to enable mechanical parts made of ordinary and sustainable materials (e.g. cast iron or plain steels) to be operated under even harsher conditions of higher load and higher wear environment with improved performance.展开更多
Inconsistent condom use among persons on antiretroviral treatment (ART) is a major public health concern because of the risk of HIV transmission. This study examined the association between socio-demographic variables...Inconsistent condom use among persons on antiretroviral treatment (ART) is a major public health concern because of the risk of HIV transmission. This study examined the association between socio-demographic variables and knowing partners’ HIV status, multiple sex partners, and consistent condom use among 400 HIV-infected adults who had received ART for at least six months in Johannesburg, South Africa. The study used a cross-sectional survey and a structured interviewer administered questionnaire. Over half (n = 225, 56.3%) of participants were on ART for more than two years. Two thirds (n = 234, 63.2%) were aware of partner’s HIV status. Over a third (n = 136, 34.0%) reported having more than one sex partners. Three quarters (n = 279, 75.8%) reported consistent condom use with regular partner. Discussing HIV testing (aOR = 2.28, CI: 1.31 -3.95), awareness of partner’s HIV status (aOR = 2.59, CI: 1.50 -4.46), level of education (aOR = 0.64, CI: 0.42 -0.98), and duration on ART (aOR = 0.71, CI: 1.31 -3.95) were predictors for consistent condom use. Awareness of partner’s HIV status was associated with multiple partnership (aOR = 0.38, CI: 0.21 -0.66), living with partner (aOR = 4.75, CI: 2.86 -7.91), discussing HIV testing (aOR = 2.43, CI: 1.48 -3.99), and duration on ART (aOR = 2.04, CI: 1.43 -2.92). While gender (aOR = 5.68, CI: 3.46 -9.34), marital status (aOR = 0.44, CI: 0.25 -0.77), and awareness of partner’s HIV status (aOR = 0.52, CI: 0.30 -0.89) were associated with multiple partnerships. Risky sexual behaviours occurred in all types of partners and knowing partner’s HIV status was a predictor for consistent condom use with all types of partners. It is essential that HIV prevention strategies create an enabling environment for disclosure and reductions of risky sexual behaviours by HIV-infected persons on ART.展开更多
This paper deals with a very important issue,which concerns the possibility of establishing a public-private partnership(PPP),through which link is made between the public and the private sector,for the benefit of bot...This paper deals with a very important issue,which concerns the possibility of establishing a public-private partnership(PPP),through which link is made between the public and the private sector,for the benefit of both sectors,which is a very important opportunity for the realization of different infrastructure projects,and of course tourism facilities can be created in this form.Particular attention is given to the legal regulation of this issue in the Republic of Macedonia.It is mainly expressed through the provisions of the Law on PPP,which makes a clear distinction between the public and the private partner.Public partner is a legal entity that gives an agreement for the establishment of a public private partnership.Private Partner is a domestic or foreign legal entity or natural person or consortium with whom the public partner concludes an agreement for a PPP.展开更多
VE organizational field is a management meaning field formed by the mutual action of resources element.It studies leader and partners in VE as a system,and founds the affiliation among them by the relation of resource...VE organizational field is a management meaning field formed by the mutual action of resources element.It studies leader and partners in VE as a system,and founds the affiliation among them by the relation of resources.It describes candidate partner enterprise's inner trait and exterior trait by quality parameter and exterior parameter,then analyzes and evaluates them.It combines the qualitative variable and quantitative variable to evaluate the candidate enterprises.It integrates static and dynamic method to help the VE leader to choose partner,which is good for the whole alliance.展开更多
文摘China-Africa relations maintained their upward trajectory in 2024,with new plans for future cooperation taking shape.Chinese President Xi Jinping described the China-Africa partnership as being at its best in history.The Beijing Summit of the Forum on China-Africa Cooperation(FOCAC),held in September 2024,elevated bilateral ties between China and African countries with diplomatic relations with China to a strategic level.It also redefined China-Africa relations as an“all-weather China-Africa community with a shared future for the new era.”This signifies that China and Africa will remain steadfast friends and close development partners,regardless of changes in the international landscape.
基金supported by the Beijing Natural Science Foundation(No.L212029)the National Natural Science Foundation of China(No.62271043).
文摘To meet the requirements of electromagnetic(EM)theory and applied physics,this study presents an overview of the state-of-the-art research on obtaining the EM properties of media and points out potential solutions that can break through the bottlenecks of current methods.Firstly,based on the survey of three mainstream approaches for acquiring EM properties of media,we identify the difficulties when implementing them in realistic environments.With a focus on addressing these problems and challenges,we propose a novel paradigm for obtaining the EM properties of multi-type media in realistic environments.Particularly,within this paradigm,we describe the implementation approach of the key technology,namely“multipath extraction using heterogeneous wave propagation data in multi-spectrum cases”.Finally,the latest measurement and simulation results show that the EM properties of multi-type media in realistic environments can be precisely and efficiently acquired by the methodology proposed in this study.
文摘This article presents the history and challenges of patient graduation,positioning it as a means of supporting patient engagement and user involvement in the healthcare system.A set of laws related to patient rights and healthcare quality allows for the integration of patients into the healthcare system,but they face the unpreparedness of institutions in this new field of practices.Patient graduation requires transformations in the modes of reception and financing of universities,as well as in the pedagogical methods that need to be tailored to the reception and training of individuals in vulnerable situations.The article provides a detailed description of the example,history,and effects of the creation of the first open diploma in oncology for patient partners in France and concludes by emphasizing the need for concrete mechanisms for social recognition of user engagement in the healthcare system.
基金Supported by Lishui Science and Technology Bureau Research Fund,No.2013JYZB43Medical and Health Science and Technology Plan Project of Zhejiang Province,No.2015KYB371
文摘AIM To investigate alterations in the fecal microbiome using 16 S r RNA amplicon sequencing in couples in the same cohabitation environment.METHODS Fecal samples were collected from eight ulcerative colitis(UC) patients and their healthy partners at Lishui People's Hospital, Zhejiang Province, China. DNA was extracted and the variable regions V3 and V4 of the 16 S r RNA genes were PCR amplified using a two-step protocol. Clear reads were clustered into operational taxonomic units(OTUs) at the 97% sequence similarity level using UCLUST v1.2.22. The Wilcoxon rank-sumtest(R v3.1.2) was used to compare inter-individual differences. Differences with a P value < 0.05 were considered statistically significant.RESULTS Fecal microbial communities were more similar among UC patients than their healthy partners(P = 0.024). UC individuals had a lower relative abundance of bacteria belonging to the Firmicutes, especially Blautia, Clostridium, Coprococcus and Roseburia(P < 0.05). Microbiota dysbiosis was detected in UC patients and their healthy partners. Relevant genera included Akkermansiam, Bacteroides, Escherichia, Lactobacillales, Klebsiella and Parabacteroides. The enriched pathways in fecal samples of UC patients were related to lipid and nucleotide metabolism. Additionally, the pathways involved in membrane transport and metabolism of cofactors and vitamins were more abundant in the healthy partners.CONCLUSION Our results suggested that the microbial composition might be affected in healthy partners cohabiting with UC patients, especially in terms of microbiota dysbiosis.
文摘We investigated the relationships between the existence of exercise partners and exercise habits among Japanese university students. Subjects were 650 university students (539 males, 111 females;age range 18 - 27 years). They responded to an anonymous questionnaire asking about current and past exercise habits, preference for exercise (i.e., like or dislike of exercise), and the existence of one or more exercise partners. In the results, the existence of exercise partners had a significant association with exercise habits at each school stage in both genders. Exercise preference had a significant association with exercise habits during high school in both genders;during primary and middle school, however, this association was significant only in males. In males, exercise habits and the preference for exercising in high school affected current exercise habits. In females, only exercise habits in high school affected current exercise habits. Our results suggest that the existence of one or more exercise partners is important for the practice of exercise, as well as the preference for exercise. They also suggest that continuity of exercise habits is different between males and females.
文摘The time dependent vehicle routing problem with time windows(TDVRPTW) is considered. A multi-type ant system(MTAS) algorithm hybridized with the ant colony system(ACS)and the max-min ant system(MMAS) algorithms is proposed. This combination absorbs the merits of the two algorithms in solutions construction and optimization separately. In order to improve the efficiency of the insertion procedure, a nearest neighbor selection(NNS) mechanism, an insertion local search procedure and a local optimization procedure are specified in detail. And in order to find a balance between good scouting performance and fast convergence rate, an adaptive pheromone updating strategy is proposed in the MTAS. Computational results confirm the MTAS algorithm's good performance with all these strategies on classic vehicle routing problem with time windows(VRPTW) benchmark instances and the TDVRPTW instances, and some better results especially for the number of vehicles and travel times of the best solutions are obtained in comparison with the previous research.
基金The Hong Kong Polytechnic University through the group project "Fundamentals of Earthquake Engineering for Hong Kong"(4-ZZCD)the collaborative research project with Beijing University of Technology(4-ZZGD)
文摘Estimation of lateral displacement and acceleration responses is essential to assess safety and serviceability of high-rise buildings under dynamic loadings including earthquake excitations. However, the measurement information from the limited number of sensors installed in a building structure is often insufficient for the complete structural performance assessment. An integrated multi-type sensor placement and response reconstruction method has thus been proposed by the authors to tackle this problem. To validate the feasibility and effectiveness of the proposed method, an experimental investigation using a cantilever beam with multi-type sensors is performed and reported in this paper. The experimental setup is first introduced. The finite element modelling and model updating of the cantilever beam are then performed. The optimal sensor placement for the best response reconstruction is determined by the proposed method based on the updated FE model of the beam. After the sensors are installed on the physical cantilever beam, a number of experiments are carried out. The responses at key locations are reconstructed and compared with the measured ones. The reconstructed responses achieve a good match with the measured ones, manifesting the feasibility and effectiveness of the proposed method. Besides, the proposed method is also examined for the cases of different excitations and unknown excitation, and the results prove the proposed method to be robust and effective. The superiority of the optimized sensor placement scheme is finally demonstrated through comparison with two other different sensor placement schemes: the accelerometer-only scheme and non-optimal sensor placement scheme. The proposed method can be applied to high-rise buildings for seismic performance assessment.
文摘User generated content,e.g.,from YouTube,the most popular online video sharing site,is one of the major sources of today's big data and it is crucial to understand their inherent characteristics.Recently,YouTube has started working with content providers(known as YouTube partners) to promote the users' watching and sharing activities.The substantial benefit is to further augment its service and monetize more videos,which is crucial to both YouTube and its partners,as well as to other providers of relevant services.In this paper,our main contribution is to analyze the massive amounts of video data from a YouTube partner's view.We make effective use of Insight,a new analytics service of YouTube that offers simple data analysis for partners.To provide the practical guidance from the raw Insight data,we enable more complex investigations for the inherent features that affect the popularity of the videos.Our findings facilitate YouTube partners to re-design current video publishing strategies,having more opportunities to attract more views.
文摘Objective: To investigate the transmission ratio andepidemiology of Chlamydia trachomatis (Ct) andUreaplasma urealyticum (Uu) between regular sexualpartners. Methods: We collected secretion specimens of geni-tourinary tract from sexual partners who attended ourclinic during the period from May 1, 1999 to May 31,2000 and then detected Ct and Uu in the specimens. Results: The inconsistent rate of Ct and Uu infectedbetween sexual partners was 59.22% and 38.92%respectively. There were no correlations between pa-tients' age and the inconsistent rate of Ct and Uu in-fected (P>0.05). The most common inconsistency be-tween regular partners was seen in man with Ct infec-tion while in female with Uu infection; and in manwith concurrent infection of Ct while in female onlywith Uu; or in man with Ct infection while in female noCt and Uu were detected. Conclusion: The sexual transmitting ability of Ctand Uu is not as active as we have expected.
文摘The current study examined the relationship between perceived messages about the bodies of adult men from their sexual partners and the actual body image of these men. Interviews were conducted among 38 middle-aged men. Feedback from partners was generally complimentary, and the men were generally positive about their body image. Partners were seen to be more focused on a healthy body rather than a physically attractive body. The implications of these findings for better understanding the social influence on adult men to obtain a healthy body weight are discussed.
基金This paper is supported by National High-Tech R&D Program for CIMS, China (Grant No. 2003AA411110) theNational Research Foundation for Doctoral Program of Higher Education, China (Grant No. 20040699025).
文摘The three levels optimizing strategy is put forward for the networked manufacturing resources optimizing configuration, namely, the optimizing of a logical manufacturing process, the optimizing of simulation-based integration of process planning and scheduling, and the optimizing of networked production scheduling. Then, the web services-based architecture of networked manufacturing resources optimizing configuration is brought forward. Finally, the key algorithm of the networked manufacturing resources optimizing configuration is discussed, namely, the two phases manufacturing partners selection method, which including the group technology-based manufacturing resources pre-configuration and the genetic algorithm-based executable manufacturing process optimizing.
文摘Background: Partners of cancer patients are at elevated risk of experiencing psychological distress. Psychological distress is known to be countered by the protective factor, resilience. The relationship between psychological distress and resilience among partners of cancer patients remains to be examined by quantitative studies. We aimed to investigate the association between psychological distress, and resilience and cancer-related psychological experience among partners of cancer patients receiving outpatient chemotherapy. Methods: Spouses and significant others of cancer patients were consecutively recruited into our cross-sectional study. The primary outcome was psychological distress, as assessed by the Hospital Anxiety and Depression Scale. The primary explanatory variables were resilience, as assessed by the short Japanese version of the Resilience Scale, and cancer-related psychological experience. Traumatic stress was assessed by the Japanese-language version of the Impact of Event Scale-Revised, while perception of caregiving burden and patients’ symptoms, and psychological support needs were assessed by single-item questions. To examine the association between psychological distress, and resilience and partners’ psychological experience, hierarchical multiple regression analysis was applied. Results: Psychological distress was evident in 33 of 109 partners, (30.3%, 95% confidence interval, 21.5 - 39.1). After adjusting for potential confounders, hierarchical multiple regression analysis showed the main effect of resilience. In the final step, while resilience was not found to be significant, psychological distress was observed to be positively associated with traumatic stress and perceived caregiving burden (β = 0.64, p β = 0.22, p Conclusions: The protective effect of resilience on partners’ psychological distress is moderated by traumatic stress and perceived caregiving burden during patients’ chemotherapy. The findings of this study suggest that a systematic way of providing appropriate psychological service to appropriate partners of cancer patients is required.
文摘Globally, research indicates that monogamous married women living in slums are at heightened risk of HIV men’s risky sexual behaviour. Hence, to reduce the risk of HIV transmission, there is need to understand the number, nature and variation in transition of sexual partners of men in living in slums. This paper uses India’s National Family Health Survey-3 data to estimate the variation in the type of sexual partners among sexually active men age 15 - 54 with more than one sexual partner in last 12 months prior to the survey in eight slums?of India. Among sexually active men, 1.3 percent reported having more than one sexual partner in the last 12 months prior to the survey. Men who are more likely to have two or more partners are those who are young, especially below age 25 years, never married, educated up to 5 years, and from middle class. There is a higher increase in the probability of sex with spouse from second last to the last sexual partner in non-slum areas than slum areas. However, in case of transition from other friends/relatives and female sex workers to spousal partners, there is a major decline in probability among non-slum men than slum men. These transitions are extremely important from the perspective of curbing the spread of HIV epidemic, especially in situations where women lack control over their own sexuality and seldom use condom in marital sex. Therefore, strategies focused in slums should either consider reducing men’s risky sexual behaviour or build capacities of women to negotiate safe sex in marital relationships or consider a combination of both.
文摘Reducing disparities in STI/HIV rates for young heterosexual African-American women in the US is a public health priority. Although several strategies can reduce risk, some sexually experienced young women are choosing to abstain from sex for various reasons and periods of time following sexual debut, a practice known as secondary abstinence. However, others who desire to practice secondary abstinence find it difficult to do so. This qualitative study explored barriers that explained the dissonance between interest in secondary abstinence and continued sexual activity. In-depth interviews were conducted with 20 sexually-experienced African-American adolescent females, ages 18 - 23, who expressed interest in secondary abstinence. Partner-related barriers that created power imbalances presented the greatest challenges to becoming or remaining abstinent. Findings suggest that teaching young women how to recognize characteristics of healthy and unhealthy relationships, identify power imbalances, communicate assertively and develop positive coping skills can empower young women to build healthier relationships with their partners.
基金financially supported by the Guangdong Academy of Science Fund(No.2020GDASYL-20200101001)the Guangdong Major Project of Basic and Applied Basic Research(No.2020B0301030006)+4 种基金the China Postdoctoral Science Foundation(No.2022M720858)the Scientific Research Fund of Hunan Provincial Education Department(No.21B0726)the National Natural Science Foundation of China(Nos.U1764253,51971044,U1910213,52001037,and U207601)the Qinghai Scientific&Technological Program(No.2018-GX-A1)the Natural Science Foundation of Chongqing,China(No.cstc2019jcyjmsxmX0234).
文摘Mg-3Al-1Zn(AZ31)sheets were produced by transverse gradient extrusion(TGE)process.The flow behavior and dynamic recrystallization during extrusion were systematically analyzed.The microstructures,textures,and mechanical behavior of extruded AZ31 sheet were also analyzed and compared with conventional extruded(CE)sheet.The results showed that fine grain structure and multi-type unique textures were formed in TGE sheet because of the generation of extra flow velocity along transverse direction(TD)and flow velocity gradient along extrusion direction(ED)during extrusion.The basal poles gradually deviated away normal direction(ND)from edge to center of the TGE sheet along TD,and the largest inclination angle at center region reached around 65°.Furthermore,the basal poles inclined from ED to TD 40°-63°,except for the center region of TGE sheet.The TGE sheet presented higher ductility and strain hardening exponent(n-value),but lower yield strength and Lankford value(r-value)in comparison with the CE sheet.Both the basal<a>slip and tensile twins were easy to be activated during deformation,and the largest elongation of 41%and the lowest yield strength of 86.5 MPa were obtained for the ED-center sample in the TGE sheet.
文摘Sliding wear tests of chilled cast iron tappet-disc and cam-ball tribo-partners were conducted by using ball on disc testing device. Magnetron sputtering CrTiAlN hard coating and Graphite like carbon (GLC) solid lubricant coatings were applied on either one or both of the contact surfaces on tribo-partners. Ball crater device and scanning electron microscope were used to investigate surface wear of rubbed track on disc and wear scar on ball. The sliding performances of tribo-partners were evaluated in terms of coefficient of friction at sliding surfaces and specific wear rate (SWR) on both of the rubbed surfaces under specific test conditions. All test results showed that GLC solid lubricant coating on both surfaces of tappet-disc and cam-ball was the best option to allow this tribo-partners having high performance in terms of sliding under high load with low coefficient of friction and low SWR. The advantage of using GLC solid lubricant coating is to enable mechanical parts made of ordinary and sustainable materials (e.g. cast iron or plain steels) to be operated under even harsher conditions of higher load and higher wear environment with improved performance.
文摘Inconsistent condom use among persons on antiretroviral treatment (ART) is a major public health concern because of the risk of HIV transmission. This study examined the association between socio-demographic variables and knowing partners’ HIV status, multiple sex partners, and consistent condom use among 400 HIV-infected adults who had received ART for at least six months in Johannesburg, South Africa. The study used a cross-sectional survey and a structured interviewer administered questionnaire. Over half (n = 225, 56.3%) of participants were on ART for more than two years. Two thirds (n = 234, 63.2%) were aware of partner’s HIV status. Over a third (n = 136, 34.0%) reported having more than one sex partners. Three quarters (n = 279, 75.8%) reported consistent condom use with regular partner. Discussing HIV testing (aOR = 2.28, CI: 1.31 -3.95), awareness of partner’s HIV status (aOR = 2.59, CI: 1.50 -4.46), level of education (aOR = 0.64, CI: 0.42 -0.98), and duration on ART (aOR = 0.71, CI: 1.31 -3.95) were predictors for consistent condom use. Awareness of partner’s HIV status was associated with multiple partnership (aOR = 0.38, CI: 0.21 -0.66), living with partner (aOR = 4.75, CI: 2.86 -7.91), discussing HIV testing (aOR = 2.43, CI: 1.48 -3.99), and duration on ART (aOR = 2.04, CI: 1.43 -2.92). While gender (aOR = 5.68, CI: 3.46 -9.34), marital status (aOR = 0.44, CI: 0.25 -0.77), and awareness of partner’s HIV status (aOR = 0.52, CI: 0.30 -0.89) were associated with multiple partnerships. Risky sexual behaviours occurred in all types of partners and knowing partner’s HIV status was a predictor for consistent condom use with all types of partners. It is essential that HIV prevention strategies create an enabling environment for disclosure and reductions of risky sexual behaviours by HIV-infected persons on ART.
文摘This paper deals with a very important issue,which concerns the possibility of establishing a public-private partnership(PPP),through which link is made between the public and the private sector,for the benefit of both sectors,which is a very important opportunity for the realization of different infrastructure projects,and of course tourism facilities can be created in this form.Particular attention is given to the legal regulation of this issue in the Republic of Macedonia.It is mainly expressed through the provisions of the Law on PPP,which makes a clear distinction between the public and the private partner.Public partner is a legal entity that gives an agreement for the establishment of a public private partnership.Private Partner is a domestic or foreign legal entity or natural person or consortium with whom the public partner concludes an agreement for a PPP.
基金Sponsored by the Fund of Shanghai Municipal Education Commission(Grant No.05FZ43).
文摘VE organizational field is a management meaning field formed by the mutual action of resources element.It studies leader and partners in VE as a system,and founds the affiliation among them by the relation of resources.It describes candidate partner enterprise's inner trait and exterior trait by quality parameter and exterior parameter,then analyzes and evaluates them.It combines the qualitative variable and quantitative variable to evaluate the candidate enterprises.It integrates static and dynamic method to help the VE leader to choose partner,which is good for the whole alliance.