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A Novel Anti-Collision Algorithm for Large Scale of UHF RFID Tags Access Systems
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作者 Xu Zhang Yi He +9 位作者 Haiwen Yi Yulu Zhang Yuan Li Shuai Ma Gui Li Zhiyuan Zhao Yue Liu Junyang Liu Guangjun Wen Jian Li 《Computers, Materials & Continua》 SCIE EI 2024年第7期897-912,共16页
When the radio frequency identification(RFID)system inventories multiple tags,the recognition rate will be seriously affected due to collisions.Based on the existing dynamic frame slotted Aloha(DFSA)algorithm,a sub-fr... When the radio frequency identification(RFID)system inventories multiple tags,the recognition rate will be seriously affected due to collisions.Based on the existing dynamic frame slotted Aloha(DFSA)algorithm,a sub-frame observation and cyclic redundancy check(CRC)grouping combined dynamic framed slotted Aloha(SUBF-CGDFSA)algorithm is proposed.The algorithm combines the precise estimation method of the quantity of large-scale tags,the large-scale tags grouping mechanism based on CRC pseudo-randomcharacteristics,and the Aloha anti-collision optimization mechanism based on sub-frame observation.By grouping tags and sequentially identifying themwithin subframes,it accurately estimates the number of remaining tags and optimizes frame length accordingly to improve efficiency in large-scale RFID systems.Simulation outcomes demonstrate that this proposed algorithmcan effectively break through the system throughput bottleneck of 36.8%,which is up to 30%higher than the existing DFSA standard scheme,and has more significant advantages,which is suitable for application in largescale RFID tags scenarios. 展开更多
关键词 Radio frequency identification anti-collision tags grouping dynamic framed slotted Aloha
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The biosafety level-2 macromolecular crystallography beamline(BL10U2)at the Shanghai Synchrotron Radiation Facility 被引量:1
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作者 Qin Xu Hua‑Ting Kong +10 位作者 Ke Liu Huan Zhou Kun‑Hao Zhang Wei‑Wei Wang Min‑Jun Li Qiang‑Yan Pan Xing‑Ya Wang Yu‑Zhu Wang Feng Yu Xing‑Yu Gao Qi‑Sheng Wang 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2023年第12期251-263,共13页
BL10U2 is an undulator-based macromolecular crystallography(MX)beamline located at the 3.5-GeV Shanghai Synchrotron Radiation Facility.BL10U2 is specifically designed for conducting routine and biosafety level-2(BSL-2... BL10U2 is an undulator-based macromolecular crystallography(MX)beamline located at the 3.5-GeV Shanghai Synchrotron Radiation Facility.BL10U2 is specifically designed for conducting routine and biosafety level-2(BSL-2)MX experiments utilizing high-flux tunable X-rays with energies from 7 to 18 keV,providing a beam spot size of 20μm(horizontal)×10μm(vertical)at the sample point.Certification by the Shanghai Pudong Municipal Health Commission confirmed the capability to perform BSL-2 MX experiments.The beamline is currently equipped with an Eiger X 16 M detector and two newly developed in-house high-precision diffractometers that can be switched to perform conventional or in situ crystal diffraction experiments.An automatic sample changer developed in-house allows fast sample exchange in less than 30 s,supporting high-throughput MX experimentation and rapid crystal screening.Data collection from both the diffractometer and detector was controlled by an in-house developed data collection software(Finback)with a user-friendly interface for convenient operation.This study presents a comprehensive overview of the facilities,experimental methods,and performance characteristics of the BL10U2 beamline. 展开更多
关键词 Shanghai Synchrotron Radiation facility BSL-2 MX beamline BL10U2
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BL02U1:the relocated macromolecular crystallography beamline at the Shanghai Synchrotron Radiation Facility 被引量:1
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作者 Ke Liu Huan Zhou +9 位作者 Qin Xu Hua‑Ting Kong Kun‑Hao Zhang Wei‑Wei Wang Min‑Jun Li Zhi‑Jun Wang Qiang‑Yan Pan Xing‑Ya Wang Feng Yu Qi‑Sheng Wang 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2023年第12期146-155,共10页
Macromolecular crystallography beamline BL17U1 at the Shanghai Synchrotron Radiation Facility has been relocated,upgraded,and given a new ID(BL02U1).It now delivers X-rays in the energy range of 6–16 keV,with a focus... Macromolecular crystallography beamline BL17U1 at the Shanghai Synchrotron Radiation Facility has been relocated,upgraded,and given a new ID(BL02U1).It now delivers X-rays in the energy range of 6–16 keV,with a focused beam of 11.6μm×4.8μm and photon flux greater than 1012 phs/s.The high credibility and stability of the beam and good timing synchronization of the equipment significantly improve the experimental efficiency.Since June 2021,when it officially opened to users,over 4200 h of beamtime have been provided to over 200 research groups to collect data at the beamline.Its good performance and stable operation have led to the resolution of several structures based on data collected at the beamline. 展开更多
关键词 Macromolecular crystallography beamline Shanghai Synchrotron Radiation facility BL02U1
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Study on Control Techniques of Virus Diseases in Facility Cherry
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作者 Jing SHU Suhui LIU +2 位作者 Aihua ZHANG Jinquan WANG Xinyu LIAN 《Agricultural Biotechnology》 CAS 2023年第1期19-20,30,共3页
The diseases of sweet cherry caused by viruses and viroids have occurred in the main cherry producing areas of China and are increasing year by year, which has become an important factor affecting the yield and qualit... The diseases of sweet cherry caused by viruses and viroids have occurred in the main cherry producing areas of China and are increasing year by year, which has become an important factor affecting the yield and quality of sweet cherry. For this reason, this paper elaborated the prevention and countermeasures of virus diseases from six aspects, including soil treatment, cultivation of disease-free seedlings, prevention of disease and pest damage, reasonable pruning, water management, and treatment of virus diseases, in order to provide technical guidance for the disease resistance, high quality and high yield of facility cherry, as well as information reference for the further improvement of the technical system of virus disease prevention and cultivation of facility cherry. 展开更多
关键词 CHERRY facility Virus disease Control technique
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Improved Adaptive Differential Evolution Algorithm for the Un-Capacitated Facility Location Problem
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作者 Nan Jiang Huizhen Zhang 《Open Journal of Applied Sciences》 CAS 2023年第5期685-695,共11页
The differential evolution algorithm is an evolutionary algorithm for global optimization and the un-capacitated facility location problem (UFL) is one of the classic NP-Hard problems. In this paper, combined with the... The differential evolution algorithm is an evolutionary algorithm for global optimization and the un-capacitated facility location problem (UFL) is one of the classic NP-Hard problems. In this paper, combined with the specific characteristics of the UFL problem, we introduce the activation function to the algorithm for solving UFL problem and name it improved adaptive differential evolution algorithm (IADEA). Next, to improve the efficiency of the algorithm and to alleviate the problem of being stuck in a local optimum, an adaptive operator was added. To test the improvement of our algorithm, we compare the IADEA with the basic differential evolution algorithm by solving typical instances of UFL problem respectively. Moreover, to compare with other heuristic algorithm, we use the hybrid ant colony algorithm to solve the same instances. The computational results show that IADEA improves the performance of the basic DE and it outperforms the hybrid ant colony algorithm. 展开更多
关键词 Un-Capacitated facility Location Problem Differential Evolution Algorithm Adaptive Operator
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Minimum dose path planning for facility inspection based on the discrete Rao-combined ABC algorithm in radioactive environments with obstacles
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作者 Kwon Ryong Hong Su Il O +2 位作者 Ryon Hui Kim Tae Song Kim Jang Su Kim 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2023年第4期26-40,共15页
Workers who conduct regular facility inspections in radioactive environments will inevitably be affected by radiation.Therefore,it is important to optimize the inspection path to ensure that workers are exposed to the... Workers who conduct regular facility inspections in radioactive environments will inevitably be affected by radiation.Therefore,it is important to optimize the inspection path to ensure that workers are exposed to the least amount of radiation.This study proposes a discrete Rao-combined artificial bee colony(ABC)algorithm for planning inspection paths with minimum exposure doses in radioactive environments with obstacles.In this algorithm,retaining the framework of the traditional ABC algorithm,we applied the directional solution update rules of Rao algorithms at the employed bee stage and onlooker bee stage to increase the exploitation ability of the algorithm and implement discretion using the swap operator and swap sequence.To increase the randomness of solution generation,the chaos algorithm was used at the initialization stage.The K-opt operation technique was introduced at the scout bee stage to increase the exploration ability of the algorithm.For path planning in an environment with complex structural obstacles,an obstacle detour technique using a recursive algorithm was applied.To evaluate the performance of the proposed algorithm,we performed experimental simulations in three hypothetical environments and compared the results with those of improved particle swarm optimization,chaos particle swarm optimization,improved ant colony optimization,and discrete Rao’s algorithms.The experimental results show the high performance of the proposed discrete Rao-combined ABC algorithm and its obstacle detour capability. 展开更多
关键词 Minimum dose Path planning Nuclear facility inspection ABC algorithm Rao algorithms Swap sequence K-opt operation
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Effects of Meteorological Conditions on Yield and Quality of Facility Hami Melon
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作者 Lei ZHANG Xuemei LYU Peng LENG 《Agricultural Biotechnology》 CAS 2023年第1期16-18,共3页
With different varieties of facility Hami melon(Cucumis melo var. sacchairinus) as test materials, the effects of meteorological conditions on the yield and quality of different varieties of facility Hami melon were a... With different varieties of facility Hami melon(Cucumis melo var. sacchairinus) as test materials, the effects of meteorological conditions on the yield and quality of different varieties of facility Hami melon were analyzed. The results showed that among the yield and quality traits of melon, the variation degree of average single melon weight was the highest, and the coefficient of variation was 33.05%. The variation degree of leaf area index was the lowest, and the coefficient of variation was 11.00%. Through the correlation analysis of meteorological factors with the yield and quality of facility Hami melon, it was found that the quality traits of facility Hami melon were significantly positively correlated with maximum temperature and sunshine duration, and significantly negatively correlated with precipitation. The yield traits were positively correlated with maximum temperature, sunshine duration and precipitation. 展开更多
关键词 Meteorological conditions facility Hami melon(Cucumis melo var.sacchairinus) YIELD QUALITY
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Facile preparation of Fe/N-based biomass porous carbon composite towards enhancing the thermal decomposition of DAP-4
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作者 Er-hai An Xiao-xia Li +5 位作者 Cun-juan Yu Ying-xin Tan Zi-jun Fan Qing-xia Li Peng Deng Xiong Cao 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2024年第1期288-294,共7页
Fe/N-based biomass porous carbon composite(Fe/N-p Carbon) was prepared by a facile high-temperature carbonization method from biomass,and the effect of Fe/N-p Carbon on the thermal decomposition of energetic molecular... Fe/N-based biomass porous carbon composite(Fe/N-p Carbon) was prepared by a facile high-temperature carbonization method from biomass,and the effect of Fe/N-p Carbon on the thermal decomposition of energetic molecular perovskite-based material DAP-4 was studied.Biomass porous carbonaceous materials was considered as the micro/nano support layers for in situ deposition of Fe/N precursors.Fe/Np Carbon was prepared simply by the high-temperature carbonization method.It was found that it showed the inherent catalysis properties for thermal decomposition of DAP-4.The heat release of DAP-4/Fe/N-p Carbon by DSC curves tested had increased slightly,compared from DAP-4/Fe/N-p Carbon-0.The decomposition temperature peak of DAP-4 at the presence of Fe/N-p Carbon had reduced by 79°C from384.4°C(pure DAP-4) to 305.4°C(DAP-4/Fe/N-p Carbon-3).The apparent activation energy of DAP-4thermal decomposition also had decreased by 29.1 J/mol.The possible catalytic decomposition mechanism of DAP-4 with Fe/N-p Carbon was proposed. 展开更多
关键词 Biomass materials Porous carbon DAP-4 Thermal decomposition facile method
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Water, Sanitation and Hygiene in Lower-Level Health Care Facilities of Dar es Salaam Region in Tanzania: Status towards Achieving the Sustainable Development Goals and Way Forward
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作者 Mariam Mahamudu Hussein Mohamed +8 位作者 Michael Habtu Dennis Rweyemamu Anyitike Mwakitalima Amour Seleman Erick Mgina Khalid Massa Grace Saguti Andre Arsene Bita Fouda Zabulon Yoti 《Advances in Infectious Diseases》 CAS 2024年第1期279-295,共17页
Background: Improving Water, Sanitation and Hygiene in health care settings is a critical prerequisite for achieving national health goals and Sustainable Development Goals (SDGs). The World Health Organization (WHO) ... Background: Improving Water, Sanitation and Hygiene in health care settings is a critical prerequisite for achieving national health goals and Sustainable Development Goals (SDGs). The World Health Organization (WHO) has set a target for each United Nations member state to reach by 2030. Each member state is required to reach by 2022, 2025 and 2030 at least 60%, 80% and 100%, respectively of basic level of service of the five elements which are water, sanitation, hygiene, waste management and environmental cleaning. Methods: This study aimed to evaluate and document the current state of basic water, sanitation, and hygiene services in all lower-level health care facilities in the Dar es Salaam region of Tanzania as of July 2022. A cross-sectional study was conducted in 99 public dispensaries in the Dar es Salaam region’s five councils: Ubungo, Kigamboni, Kinondoni and Temeke Municipalities, and Ilala City. The interviewee form and observational checklists were both digitalized using the Kobo tool software. The respondents were health care facility in-charges or nurse in-charges. Data were downloaded, validated, and imported to Stata version 15 for analysis. Results: The basic WASH level per JMP is far below the target in 2022. Each member state by 2022 is required to reach at least 60% of the basic level of service of each element. We found a low coverage of basic WASH in the 99 dispensaries included in this study. The basic WASH coverage was met in only 10 (10.1%) of the dispensaries, while the remaining 89 (89.9%) dispensaries fall on limited WASH services. Conclusion: This study revealed lower coverage of basic WASH services in dispensaries. An urgent need is required to improve the status of WASH in all the dispensaries and facilitate the provision of quality health care services, patient safety and reduce health care associated infections. 展开更多
关键词 Dispensaries Low Level Health Care facilities Service Levels Basic WASH Dar es Salaam
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Accessibility and Fairness of Public Service Facilities from the Perspective of Supply and Demand Coordination: A Case Study of Old Urban Area of Guangzhou City
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作者 CHEN Xu LI Xin 《Journal of Landscape Research》 2024年第3期21-26,共6页
The accessibility and fairness of public service facilities are important manifestations of the convenience and equality of urban public service resource allocation.Optimizing the layout of urban public service facili... The accessibility and fairness of public service facilities are important manifestations of the convenience and equality of urban public service resource allocation.Optimizing the layout of urban public service facilities is an inevitable requirement for promoting the construction of people centered cities.This paper takes the old urban area of Guangzhou as the research area,measures the accessibility of multiple types of public service facilities based on an improved two-step floating catchment method,and combines Palma Ratio and location quotient methods to explore the fairness of urban public service facilities from two dimensions:social equity and spatial equity,with supply and demand relationship analysis as the main line.Research has shown that:①there is a significant spatial difference in the accessibility of public service facilities in the old urban areas of Guangzhou,and the comprehensive accessibility is generally higher in the central and southeastern regions of the old urban areas with fewer residential populations;②from the perspective of social equity,the resource allocation of public service facilities in the old urban areas of Guangzhou is in a seriously unfair state(with a fairness index of 2.99),and there are also varying degrees of unfairness within the streets;③from the perspective of spatial equity,the location quotient of public service facilities in the old urban areas of Guangzhou shows a pattern of multil center circles decreasing,indicating a significant spatial mismatch between the accessibility supply side of public service facilities and the demand side of the residential population.The research conclusion will provide scientific basis for optimizing the allocation of urban public service facilities and ensuring the equalization of public services. 展开更多
关键词 Public service facilities ACCESSIBILITY Social equity Space equity Guangzhou City
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Improvement in Patient Mobility Following Short-Term Rehabilitation in Skilled Nursing Facilities
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作者 Sean R. Silver Jaden A. Silver 《Open Journal of Therapy and Rehabilitation》 2024年第1期52-60,共9页
Background: Mobility in older adults can be impaired after acute illness or hospitalization, and the level of severity can be used as a predictor of one’s ability to return to independent living. Patients are often r... Background: Mobility in older adults can be impaired after acute illness or hospitalization, and the level of severity can be used as a predictor of one’s ability to return to independent living. Patients are often referred to skilled nursing facilities in hopes of improving their mobility. We wanted to prove that rehabilitative services at Skilled Nursing Facilities improve overall outcomes. Methods: We conducted a retrospective analysis of data from 4612 patients admitted for short-term rehabilitation in a large nursing home chain in California. Our aim was to determine whether patients’ mobility scores, as measured by rehabilitative staff, significantly improved by time of discharge compared to their scores at admission. Mobility scores were rated from 1 to 6, with 1 being the most dependent on aid and 6 being the most independent, over a variety of tasks at admission and compared to scores at discharge. Pearson’s correlations were performed to determine if there were significant relationships in the data: the Pearson’s correlation coefficient was used to describe the relationships between patient admission to a skilled nursing facility and medical improvement upon discharge. Results: The study demonstrated a statistically significant improvement in patients’ mobility scores upon discharge, with Medicare insured patients showing on average 57% improvement and Managed Care insured patients showing on average 59% improvement. Additionally, admission scores appeared to be predictive of the patient’s outcome at discharge. Conclusions: The values and consistency of improvement support the use of acute rehabilitative services in skilled nursing facilities. An equation can be formulated that evaluates patients’ estimated mobility statuses upon discharge from facilities based on their conditions on their arrivals. With this, new interventions can be studied and compared to the current standard of care by using these measurements. They can determine if further improvements can be made to increase patient outcomes. 展开更多
关键词 MOBILITY Skilled Nursing facility Rehabilitative Services Independent Living Healthcare
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Pediatric and adult liver transplantation in Bahrain: The experiences in a country with no available liver transplant facilities
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作者 Hasan M Isa Fatema A Alkharsi +5 位作者 Jawad K Khamis Sawsan A Hasan Zainab A Naser Zainab N Mohamed Afaf M Mohamed Shaikha A Altamimi 《World Journal of Transplantation》 2024年第1期96-111,共16页
BACKGROUND Liver transplantation(LT)is a life-saving procedure for patients with end-stage liver disease and has become the standard and most effective treatment method for these patients.There are many indications fo... BACKGROUND Liver transplantation(LT)is a life-saving procedure for patients with end-stage liver disease and has become the standard and most effective treatment method for these patients.There are many indications for LT that vary between countries and settings.The outcome of LT depends on the available facilities and surgical expertise,as well as the types of liver graft donors available.AIM To assess the clinical characteristics of patients from Bahrain who underwent LT overseas,and analyze factors affecting their survival.METHODS In this retrospective cohort study,we reviewed the medical records and overseas committee registry information of all pediatric and adult patients who were sent overseas to undergo LT by the Pediatric and Medical Departments of Salmaniya Medical Complex and Bahrain Defence Force Hospital via the Overseas Treatment Office,Ministry of Health,Kingdom of Bahrain,between 1997 and 2023.Demographic data,LT indication,donor-recipient relationship,overseas LT center,graft type,post-LT medications,and LT complications,were collected.Outcomes measured included the overall and 5-year LT survival rate.Fisher’s exact,Pearsonχ2,and Mann-Whitney U tests were used to compare the pediatric and the adults’group in terms of clinical characteristics,donor-recipient relationship,medication,complications,and outcome.Survival analysis was estimated via the Kaplan-Meier’s method.Univariate and multivariate analyses were used to detect predictors of survival.RESULTS Of the 208 eligible patients,170(81.7%)were sent overseas to undergo LT while 38(18.3%)remained on the waiting list.Of the 170 patients,167(80.3%)underwent LT and were included in the study.The majority of the patients were Bahraini(91.0%),and most were males(57.5%).One-hundred-and-twenty(71.8%)were adults and 47(28.3%)were children.The median age at transplant was 50.0[interquartile range(IQR):14.9–58.4]years.The main indication for pediatric LT was biliary atresia(31.9%),while that of adult LT was hepatitis C-related cirrhosis(35.0%).Six(3.6%)patients required re-transplantation.Most patients received a living-related liver graft(82%).Pediatric patients received more living and related grafts than adults(P=0.038 and P=0.041,respectively),while adult patients received more cadaveric and unrelated grafts.Most patients required long-term immunosuppressive therapy after LT(94.7%),of which tacrolimus was the most prescribed(84.0%),followed by prednisolone(50.7%),which was prescribed more frequently for pediatric patients(P=0.001).Most patients developed complications(62.4%)with infectious episodes being the most common(38.9%),followed by biliary stricture(19.5%).Tonsilitis and sepsis(n=12,8.1%for each)were the most frequent infections.Pediatric patients experienced higher rates of infection,rejection,and early poor graft function than adult patients(P<0.001,P=0.003,and P=0.025,respectively).The median follow-up time was 6.5(IQR:2.6–10.6)years.The overall survival rate was 84.4%,the 5-year survival rate,86.2%,and the mortality rate,15.6%.Younger patients had significantly better odds of survival(P=0.019)and patients who survived had significantly longer follow-up periods(P<0.001).CONCLUSION Patients with end-stage liver disease in Bahrain shared characteristics with those from other countries.Since LT facilities are not available,an overseas LT has offered them great hope. 展开更多
关键词 Overseas liver transplantation End-stage liver disease Liver transplant facilities Liver donor Biliary atresia Hepatitis C
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Improvement of Activities of Daily Living (ADL) for Patients Treated in Skilled Nursing Facilities (SNFs)
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作者 Jaden A. Silver Sean R. Silver 《Open Journal of Therapy and Rehabilitation》 2024年第1期61-69,共9页
Background: Self-care tasks or activities of daily living (ADL)’s performance are often disrupted after an older adult sustains an injury or illness, which can be a determining factor for discharge placement after ho... Background: Self-care tasks or activities of daily living (ADL)’s performance are often disrupted after an older adult sustains an injury or illness, which can be a determining factor for discharge placement after hospitalization, or it can determine the level of assistance required after discharge from a skilled nursing facility (SNF). We believe that comprehensive rehabilitation can improve a patient’s overall functioning during their short term stay in SNFs. The purpose of this study is to determine if an individual’s level of independence improved after admission to a skilled nursing facility and procurement of rehabilitation services. Methods: This study retrospectively reviewed 4612 nursing home patients in California who underwent rehabilitative services at skilled nursing facilities to determine how the patients responded to their environments, therapy interventions, and any other additional supportive measures. The records of patients who were admitted for short-term rehabilitation were reviewed in a blinded fashion, looking specifically at Section GG of the Minimum Data Set (MDS). Self-Care Section GG scores recorded by rehabilitative staff provide objective data and measure patients’ levels of assistance that were required. Each activity is scored from 1, being completely dependent, to 6, being entirely independent, with varying levels of assistance with scores in between. The admission scores versus the discharge scores can be compared to determine if a patient improved their level of functioning upon discharge. Results: Utilizing the Pearson’s correlation coefficient, a strong correlation of improvement in ADL performance on Section GG between the admission and discharge scores was identified, implying significant improvement in functional independence upon discharge. The average percent improvement for Managed Care patients was ~35.4% and ~39.4% for Medicare patients. Conclusions: The results support the benefits of rehabilitation services in skilled nursing facilities, and the data suggests that admission scores can be used as a predictive tool for functional outcomes. 展开更多
关键词 Activities of Daily Living Skilled Nursing facilities REHABILITATION Independent Living
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Reflection on the Integrated Development of Marine Fisheries and Tourism Based on the Transformation of Fishery Facilities: A Case Study of Ningde City of Fujian Province, China
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作者 ZHANG Guangying LI Meixiu LIN Cuisheng 《Journal of Landscape Research》 2024年第3期73-79,共7页
Based on the analysis on the current situation of marine fishery resources and development in Ningde City,this paper plans a spatial pattern for the integration of marine fishery and tourism of the“one belt,three zon... Based on the analysis on the current situation of marine fishery resources and development in Ningde City,this paper plans a spatial pattern for the integration of marine fishery and tourism of the“one belt,three zones,and multiple points”,designs key projects,analyzes the existing problems in the integrated development of fishery and tourism,and proposes relevant countermeasures and suggestions. 展开更多
关键词 facility fisheries Integration of fishery and tourism Fishery and tourism projects Ningde City of Fujian Province
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Analysis of the Impact of Road Traffic Safety Facilities on Traffic Safety
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作者 Jiawen Chu 《Journal of World Architecture》 2024年第2期72-77,共6页
The development of the national economy is closely tied to infrastructure construction.In recent years,China has seen a significant increase in the number and scale of road construction projects,aimed at facilitating ... The development of the national economy is closely tied to infrastructure construction.In recent years,China has seen a significant increase in the number and scale of road construction projects,aimed at facilitating the flow of goods and enabling convenient travel for the masses.However,this surge in road construction also raises concerns about road traffic safety.Road traffic safety facilities play a crucial role in warning and protecting against traffic accidents.To ensure their effective implementation,this paper analyzes the essence of road traffic facilities and their impact on traffic safety.By identifying challenges in the application of traffic safety facilities and adhering to safety facility application principles,suggestions are proposed to enhance traffic safety management. 展开更多
关键词 Road traffic safety facilities IMPACT PRINCIPLES Safety recommendations
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Study on Soilless Culture of Facility Strawberry 被引量:3
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作者 李永平 朱海生 +1 位作者 马宏棋 温庆放 《Agricultural Science & Technology》 CAS 2014年第7期1065-1068,共4页
[Objective] The aim was to establish a set of soilless cultivation and management method of facility strawberry cultivation in the south of China.[Method] In the research,strawberry species,substrate formulae,cultivat... [Objective] The aim was to establish a set of soilless cultivation and management method of facility strawberry cultivation in the south of China.[Method] In the research,strawberry species,substrate formulae,cultivation modes and nutri ent solutions were selected and optimized.[Result] Three-dimensional strawberry cultivation was much suitable for Frandy,Hongbao and Gumei No.1; substrate with coconut shred-mushroom residue-peat soil ratio at 2∶2∶1 was the optimal; the treatment C3,containing Ca(NO3)2·4H2O,KNO3,(NH4)2HPO4,MgSO4·7H2O,and NH4NO3 at 280,303,62,246 and 80 mg/L,promoted strawberry growth,and the cultivated strawberry was large and thick in leaves,thick in stem,dark green in leaf color,with best fruit yield and quality.Among three cultivation modes,the density,space use ratio and yield in the treatment with PVC pipes in A-shape were all higher and the strawberry was easier and more convenient for picking.[Conclusion] The research provides references for soilless cultivation of strawberry in the south of China. 展开更多
关键词 STRAWBERRY Soilless culture facility
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Facility location model for a remanufacturing logistics network 被引量:1
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作者 孙浩 达庆利 《Journal of Southeast University(English Edition)》 EI CAS 2008年第1期99-103,共5页
First a remanufactming logistics network is con- structed, in which the structure of both the forward logistics and the reverse logistics are of two levels and all the logistics facilities are capacitated. Both the re... First a remanufactming logistics network is con- structed, in which the structure of both the forward logistics and the reverse logistics are of two levels and all the logistics facilities are capacitated. Both the remanufactming products and the new products can be used to meet the demands of customers. Moreover, it is assumed that homogeneous facilities can be designed together into integrated ones, based on which a mixed integer nonlinear programming (MINLP) facility location model of the remanufacturing logistics network with six types of facilities to be sited is built. Then an algorithm based on enumeration for the model is given. The feasible combinations of binary variables are searched by enumeration, and the remaining sub-problems are solved by the LP solver. Finally, the validities of the model and the algorithm are illustrated by means of an example. The result of the sensitivity analysis of parameters indicates that the integration of homogeneous facilities may influence the optimal solution of the problem to a certain degree. 展开更多
关键词 reverse logistics remanufacturing logistics network facility location
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DESIGN OF NEW TEST FACILITY FOR MICRO-TURBO-MACHINERY
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作者 夏晨 黄国平 陈杰 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2010年第4期288-298,共11页
Micro-turbine engine has no enough space for measuring impeller characteristics,so the design and the construction of a new test facility of micro-turbo-machinery are presented for micro-centrifugal compressors and ra... Micro-turbine engine has no enough space for measuring impeller characteristics,so the design and the construction of a new test facility of micro-turbo-machinery are presented for micro-centrifugal compressors and radial turbines.The facility is used for the full speed compressor test and the long duration hot turbine test.To rapidly adjust the testing condition,all regulations of the operating state are automatically completed by the control system.The facility is also used for testing the impeller performance with a series of diameter from 55 mm to 180 mm as a result of the modular design.A thermal protection system is designed to avoid the heat distortion caused by the high turbine inlet temperature over 1 100 K and provide a proper experimental environment for the electronic components.A photoelectric torque transducer with the accuracy of 1% is designed to measure the torque of rigid shaft at a high speed of 125 000 r/min.The designing techniques for micro-turbo-machineries are verified by the impeller testing of the facility. 展开更多
关键词 engines turbo-machinery test facility PERFORMANCE
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Studies on the Economical and Practical Temperature Control Facility of Deep-Litter Systems for Swine Production
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作者 林家彬 秦竹 +5 位作者 周忠凯 顾洪如 杨杰 汤赤 陈俊 余刚 《Agricultural Science & Technology》 CAS 2013年第7期1053-1056,共4页
Deep-Litter System is a high yield approach to raise swine with pollution free in a lower cost. In the research, based on the heat stress in summer caused by fermentation, three temperature-control systems were design... Deep-Litter System is a high yield approach to raise swine with pollution free in a lower cost. In the research, based on the heat stress in summer caused by fermentation, three temperature-control systems were designed, including natural ventilation through transoms, forced ventilation via fans, and cooling by hyperbaric spray system. Specifically, the latter intermittent auto-pressurized spray system developed in our lab, which could spray successively via pressure from storage tubes without wetting the fermentation bed, is suitable for the promotion with the deep-litter technology in rural regions , since the power consumption is only 1 kwh per day. 展开更多
关键词 Deep litter system Temperature control facilities Intermittent auto-pressurized spray system Economical and practical
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Collaborative planning approach for anti-bioterrorism emergency facility location based on aerodynamics
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作者 刘明 赵林度 《Journal of Southeast University(English Edition)》 EI CAS 2007年第S1期105-110,共6页
To smooth the correlation process from bio-virus diffusion to emergency relief response,the Gaussian plume model is used to describe the diffusion of dangerous sources,where the bio-virus concentration at any given po... To smooth the correlation process from bio-virus diffusion to emergency relief response,the Gaussian plume model is used to describe the diffusion of dangerous sources,where the bio-virus concentration at any given point in affected areas can be calculated.And the toxic load rule is introduced to define the borderline of the dangerous area at different levels.Combined with this,different emergency levels of different demand points in dangerous areas are confirmed using fuzzy clustering,which allows demand points at the same emergency level to cluster in a group.Some effective emergency relief centers are chosen from the candidate hospitals which are located in different emergency level affected areas by set covering.Bioterrorism experiments which were conducted in Nanjing,Jiangsu province are simulated,and the results indicate that the novel method can be used efficiently by decision makers during an actual anti-bioterrorism relief. 展开更多
关键词 emergency facility location Gaussian plume model(GPM) toxic load rule fuzzy clustering set covering
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