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Parental Psychological Control and Internet Gaming Disorder Tendency:A Moderated Mediation Model of Core Self-Evaluation and Intentional Self-Regulation
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作者 Zhiqiao Ji Shuhua Wei Hejuan Ding 《International Journal of Mental Health Promotion》 2024年第7期547-558,共12页
Internet gaming disorder(IGD)among junior high school students is an increasingly prominent mental health concern.It is important to look for influences behind internet gaming disorder tendency(IGDT)in the junior high... Internet gaming disorder(IGD)among junior high school students is an increasingly prominent mental health concern.It is important to look for influences behind internet gaming disorder tendency(IGDT)in the junior high school student population.The present study aimed to reveal the explanatory mechanisms underlying the association between parental psychological control(PPC)and internet gaming disorder tendency among junior high school students by testing the mediating role of core self-evaluation(CSE)and the moderating role of intentional self-regulation(ISR).Participants in present study were 735 Chinese junior high school students who completed offline self-report questionnaires on parental psychological control,core self-evaluation,intentional self-regulation,and Internet gaming disorder tendency.Analyses were conducted via mediation and moderated mediation.The results showed that:(1)Parental psychological control was positively related to junior high school students’Internet gaming disorder tendency.Core self-evaluation,and intentional self-regulation were negatively related to junior high school students’Internet gaming disorder tendency,respectively.(2)Core self-evaluation partially mediated the relationship between parental psychological control and junior high school students’Internet gaming disorder tendency.(3)Intentional self-regulation moderated the association between parental psychological control and Internet gaming disorder tendency,as well as the relationships between parental psychological control and core self-evaluation and core self-evaluation and Internet gaming disorder tendency in the mediated model.Based on these findings,we believe that there is a need to weaken parental psychological control,strengthen junior high school students’core self-evaluation and intentional self-regulation,and to recognize the important role of parents as well as their children’s personal positive traits in the healthy development of junior high school students. 展开更多
关键词 Internet gaming disorder tendency parental psychological control core self-evaluation intentional self-regulation moderated mediation model junior high school students
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Evaluation of spontaneous combustion tendency of sulfide ore heap based on nonlinear parameters 被引量:4
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作者 潘伟 吴超 +2 位作者 李孜军 伍智伟 杨月平 《Journal of Central South University》 SCIE EI CAS CSCD 2017年第10期2431-2437,共7页
To explore a new evaluation method for spontaneous combustion tendency of different areas in sulfide ore heap, ore samples from a pyrite mine in China were taken as experimental materials, and the temperature variatio... To explore a new evaluation method for spontaneous combustion tendency of different areas in sulfide ore heap, ore samples from a pyrite mine in China were taken as experimental materials, and the temperature variations of the measuring points of simulated ore heap were measured. Combined with wavelet transform and nonlinear parameters extraction, a new method for spontaneous combustion tendency of different areas in sulfide ore heap based on nonlinear parameters was proposed and its reliability was verified by field test. The results indicate that temperature field evolution of the simulated ore heap presents significant spatial difference during self-heating process. Area with the maximum increasing extent of temperature in sulfide ore heap changes notably with the proceeding of self-heating reaction. Self-heating of sulfide ore heap is a chaotic evolution process, which means that it is feasible to evaluate spontaneous combustion tendency of different areas by nonlinear analysis method. There is a relatively strong correlation between the maximum Lyapunov exponent and spontaneous combustion tendency with the correlation coefficient of 0.9792. Furthermore, the sort of the maximum Lyapunov exponent is consistent with that of spontaneous combustion tendency. Therefore, spontaneous combustion tendency of different areas in sulfide ore heap can be evaluated by means of the maximum Lyapunov exponent method. 展开更多
关键词 SULFIDE ore HEAP spontaneous combustion tendency SELF-HEATING process nonlinear parameters maximum LYAPUNOV EXPONENT
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Lowering ash slagging and fouling tendency of high-alkali coal by hydrothermal pretreatment 被引量:5
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作者 Mingshun Yang Qiang Xie +3 位作者 Xin Wang He Dong Hao Zhang Chunqi Li 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2019年第3期521-525,共5页
High-alkali species in coal are notorious for causing ash slagging and fouling incidents.In this paper,four high-alkali coals were individually subject to hydrothermal pretreatment(HTP),within a batch-type autoclave a... High-alkali species in coal are notorious for causing ash slagging and fouling incidents.In this paper,four high-alkali coals were individually subject to hydrothermal pretreatment(HTP),within a batch-type autoclave at 300 -C for 1 h,and the treated coals were analyzed,along with the oxygen-containing functional groups determined by Fourier transform infrared spectrometer(FT-IR).Then the alkali species and other components in the coal ash were quantified by X-ray fluorescence(XRF)for evaluating the ash slagging and fouling tendency.Apart from this,FactSage was adopted to simulate the occurrence and transformation of alkali species during coal thermal conversion ending at various temperatures.The findings indicate that the treated coals are superior to the parent ones in terms of certain remarkable changes via HTP.The moisture,oxygen and sulfur of the hydrothermally treated coals decline obviously,while the calorific value rises sharply.HTP could reduce the alkali species to less than 2%(%,by weight,equivalent to Na2O in dry ash),with a maximum removal ratio of 88.9%,lowering the ash slagging and fouling tendency.The proposed mechanism of HTP was that the alkali species in coal matrix became released due to the breakage of the coal functional groups and micropores during HTP. 展开更多
关键词 HYDROTHERMAL PRETREATMENT High-alkali COAL ASH SLAGGING and fouling tendency Lowering FactSage
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Definition of Laplace Transforms for Distribution of the First Passage of Zero Level of the Semi-Markov Random Process with Positive Tendency and Negative Jump
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作者 Tamilla I. Nasirova Ulviyya Y. Kerimova 《Applied Mathematics》 2011年第7期908-911,共4页
One of the important problems of stochastic process theory is to define the Laplace transforms for the distribution of semi-markov random processes. With this purpose, we will investigate the semimarkov random process... One of the important problems of stochastic process theory is to define the Laplace transforms for the distribution of semi-markov random processes. With this purpose, we will investigate the semimarkov random processes with positive tendency and negative jump in this article. The first passage of the zero level of the process will be included as a random variable. The Laplace transforms for the distribution of this random variable is defined. The parameters of the distribution will be calculated on the basis of the final results. 展开更多
关键词 Laplace Transforms Semi-Markov RANDOM PROCESS RANDOM Variable PROCESS with POSITIVE tendency and NEGATIVE JUMPS
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Effect of Zn/Mg/Cu Additions on Hot Cracking Tendency and Performances of Al-Cu-Mg-Zn Alloys for Liquid Forging 被引量:4
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作者 孙永根 杜之明 +2 位作者 SU Yanni CHENG Yuansheng LIU Yongwang 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2020年第1期176-182,共7页
During the process of liquid forging, a host of hot cracking defects were found in the Al-CuMg-Zn aluminum alloy. Therefore, mechanical tests and analyses by optical microscope, scanning electron microscope, and X-ray... During the process of liquid forging, a host of hot cracking defects were found in the Al-CuMg-Zn aluminum alloy. Therefore, mechanical tests and analyses by optical microscope, scanning electron microscope, and X-ray diffraction were performed to research the influences of zinc, magnesium, and copper(three main alloying elements) on hot cracking tendency and mechanical properties. It was concluded that all the three alloying elements exerted different effects on the performances of newly designed alloys. And the impact of microstructures on properties of alloys was stronger than that of solution strengthening. Among new alloys, Al-5 Cu-4.5 Mg-2.5 Zn alloy shows better properties as follows: σb=327 MPa, δ=2.7%, HB=107 N/mm^2, and HCS=40. 展开更多
关键词 liquid FORGING Al-Cu-Mg-Zn alloys mechanical properties hot CRACKING tendency
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The Effect of Self-Investment on Hoarding Tendency of Chinese College Students:Role of Psychological Connections
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作者 Xiangli Guan Yue Zhang +6 位作者 Yang Li Yaqi Zhang Jingjing Wang Xuejiao Li Mary C.Jobe Md Zahir Ahmed Oli Ahmed 《International Journal of Mental Health Promotion》 2023年第6期755-766,共12页
Because of factors such as energy and time one invests in an object,the stronger the connection,value,and reluc-tance to lose said object individual will have.Hoarding behavior arises when individuals incorporate a st... Because of factors such as energy and time one invests in an object,the stronger the connection,value,and reluc-tance to lose said object individual will have.Hoarding behavior arises when individuals incorporate a strong attachment with themselves to an object.The purpose of this study is to examine the effect of self-investment on hoarding tendency and the roles of possession-self link and liking level in this connection.A hypothetical model of the relationship between self-investment,possession-self link,liking level,and hoarding tendency was tested.A convenience sampling method was used to survey 450 college students in Yunnan Province on either a paper-based or online self-report scale.The data were collected using self-investment,possession-self link,and liking level questionnaires,as well as the Saving Inventory Revised.Results showed positive relationship between the study variables,ranging from 0.37 to 0.87.College students’self-investment had a direct positive pre-dictive effect on hoarding tendency;self-investment,in turn,indirectly predicted hoarding tendency through the mediating effect of possession-self link;and individual liking level of items had a moderating effect for self-invest-ment on the possession-self link.This study shows how self-investment affects the hoarding tendency of college students,and the results of this study also help demonstrate the value of self-investment and possession-self link in optimizing students’hoarding tendency and thus promoting good psychological status. 展开更多
关键词 Hoarding tendency self-investment psychological connections possession-self link liking level
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Construction of Psychological Adjustment Function Model of Music Education Based on Emotional Tendency Analysis
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作者 Bin Zhang 《International Journal of Mental Health Promotion》 2023年第5期655-671,共17页
In the face offierce competition in the social environment,mental health problems gradually get the attention of the public,in order to achieve accurate mental health data analysis,the construction of music education ... In the face offierce competition in the social environment,mental health problems gradually get the attention of the public,in order to achieve accurate mental health data analysis,the construction of music education is based on emotional tendency analysis of psychological adjustment function model.Design emotional tendency analysis of music education psychological adjustment function architecture,music teaching goal as psychological adjust-ment function architecture building orientation,music teaching content as a foundation for psychological adjust-ment function architecture and music teaching process as a psychological adjustment function architecture building,music teaching evaluation as the key of building key regulating function architecture,Establish a core literacy oriented evaluation system.Different evaluation methods were used to obtain the evaluation results.Four levels of psychological adjustment function model of music education are designed,and the psychological adjust-ment function of music education is put forward,thus completing the construction of psychological adjustment function model of music education.The experimental results show that the absolute value of the data acquisition error of the designed model is minimum,which is not more than 0.2.It is less affected by a bad coefficient and has good performance.It can quickly converge to the best state in the actual prediction process and has a strong con-vergence ability. 展开更多
关键词 Emotional tendency analysis music education psychological adjustment functional model core literacy orientation
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ENSEMBLE PREDICTION EXPERIMENTS OF TYPHOON TRACK BASED ON THE STOCHASTIC TOTAL TENDENCY PERTURBATION 被引量:1
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作者 王晨稀 《Journal of Tropical Meteorology》 SCIE 2016年第3期305-317,共13页
The GRAPES-TCM is used to make ensemble prediction experiments for typhoon track.Three kinds of ensemble schemes are designed for the experiments.A total of 109 experiments are made for the nine typhoons in 2011 and t... The GRAPES-TCM is used to make ensemble prediction experiments for typhoon track.Three kinds of ensemble schemes are designed for the experiments.A total of 109 experiments are made for the nine typhoons in 2011 and the integral time is 72 h.The experiment results are shown as follows.In the three ensemble schemes,on the whole,scheme 1 has the best track prediction.Its average absolute track error and overall deviations of typhoon moving speed and moving direction are all the smallest in the three schemes.For both scheme 1 and scheme 2,they are all smaller than those of their control predictions.Both of their ensemble predictions show superiority to their deterministic predictions.Overall,compared with the observations,the typhoon moving directions of the three schemes mainly skew to the right,and in the late integration they mainly tend to be relatively slow.In the three schemes,the track dispersion of scheme 1 is the largest and that of scheme 3 the smallest.In scheme 1 it is much larger than in schemes 2 and 3.The difference of dispersion between scheme 2 and scheme 3 is small.The track dispersions of the three schemes are all much smaller than their rational dispersions.Compared with the eight domestic and overseas operational numerical weather prediction(NWP) models,scheme 1 has better predictions than the other seven operational models except ECMWF NWP model.Scheme 1 has the value of operational application. 展开更多
关键词 typhoon track ensemble scheme STOCHASTIC TOTAL tendency PERTURBATION
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Paleostress Reconstruction from 3D Seismic Data and Slip Tendency in the Northern Slope Area of the Bongor Basin, Southwestern Chad
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作者 Hakro Ahmed Suhail Xintao Yuan +3 位作者 Jianlin Li Hong Liu Yuan Liu Cong Ma 《Open Journal of Geology》 CAS 2023年第5期536-578,共43页
Paleostress plays a significant role in controlling the formation, accumulation, and distribution of reservoirs, and this could be an important factor in controlling the production of hydrocarbons from the unconventio... Paleostress plays a significant role in controlling the formation, accumulation, and distribution of reservoirs, and this could be an important factor in controlling the production of hydrocarbons from the unconventional reservoirs. In this study, we will use 3D seismic reflection data to perform the slip-tendency-based stress inversion to determine the stress field in the basement of the northern slope area in the Bongor Basin. The dataset for this technique is easily available in the oil and gas companies. The stress inversion results from the basement of the northern slope area of Bongor basin show that the maximum principal stress axis (σ1) is oriented vertically, the intermediate principal stress axis (σ2) is oriented N18° and the minimum principal stress axis (σ3) is oriented N105°, and σ2/σ1 = 0.60 and σ3/σ1 = 0.29. The findings of this paper provide significant information to understand the fault reactivation at the critical stage of hydrocarbon accumulation and the regional tectonic evolution. 展开更多
关键词 Seismic Reflection Data Slip tendency Bongor Basin Stress Inversion
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THE APPLICABILITY OF RESEARCH ON FLOOD-DROUGHT TENDENCY-AN ANALYSIS ON DISASTROUS FLOOD OF TAIHU LAKE BASININ JUNE-JULY,1991
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作者 陈家其 《Chinese Geographical Science》 SCIE CSCD 1994年第2期129-133,共5页
THE APPLICABILITY OF RESEARCH ON FLOOD-DROUGHT TENDENCY-AN ANALYSIS ON DISASTROUS FLOOD OF TAIHU LAKE BASINI... THE APPLICABILITY OF RESEARCH ON FLOOD-DROUGHT TENDENCY-AN ANALYSIS ON DISASTROUS FLOOD OF TAIHU LAKE BASININ JUNE-JULY,1991 ... 展开更多
关键词 Taihu LAKE FLOOD floold-drought tendency the Changjang River
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Coronary interventions in patients with bleeding and bleeding tendency
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作者 Thach Nguyen Lan Nguyen 《Journal of Geriatric Cardiology》 SCIE CAS CSCD 2007年第1期56-64,共9页
  In general, percutaneous coronary intervention (PCI)is contra-indicated in patients with bleeding and those that are easy to bleed because during PCI the patients need full anticoagulation to counter any thromboti...   In general, percutaneous coronary intervention (PCI)is contra-indicated in patients with bleeding and those that are easy to bleed because during PCI the patients need full anticoagulation to counter any thrombotic formation caused by introduction and manipulation of devices in the vascular system.…… 展开更多
关键词 PCI Coronary interventions in patients with bleeding and bleeding tendency PTCA UFH AMI ASA ORAL
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The Secular Tendency of the Age at Menarche in a Representative Sample of Mexican Girls from an Urban Zone in Central Mexico
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作者 María-Raquel Huerta-Franco Francisco-Miguel Vargas-Luna +3 位作者 Elba del Rosario Huerta-Franco Aminta Jimenez-Velazquez Marco Balleza Isabel Delgadillo-Holford 《Food and Nutrition Sciences》 2015年第15期1362-1370,共9页
Objective: To investigate the age at menarche, pubarche and telarche in a representative sample of residents of an urban zone of Leon, Guanajuato, Central Mexico and to evaluate the secular change of the age at menarc... Objective: To investigate the age at menarche, pubarche and telarche in a representative sample of residents of an urban zone of Leon, Guanajuato, Central Mexico and to evaluate the secular change of the age at menarche between 1985 and 2000. Methods: Using status quo and retrospective methods, menarcheal, pubarcheal and telarcheal status of girls 8 - 17 years of age (n = 1093) were determined. Multiple regression analysis and logistic regression were used to determine factors that were related to or predictive of age at menarche. Results: Median ages for menarche, pubarche and telarche in our studied sample were: 11.9 ± 0.04;11.13 ± 1.25 and 10.84 ± 1.34 years, respectively. A direct correlation was found between the age of menarche of adolescents and that of their mother (p p p = 0.001), but an indirect correlation was found with the girls’ hip circumference (p = 0.004). We demonstrated a clear secular tendency towards an earlier onset of menarche by comparing our results (11.9 ± 0.04) with data from 1985 (12.8 ± 1.3) for adolescents from the same city. Conclusion: We demonstrated a clear reduction in age at menarche of approximately 0.75 year/decade, higher than Tanner’s finding in 1962, but similar than that of Malina et al. in 2004. 展开更多
关键词 Age at MENARCHE ADOLESCENT GIRLS SECULAR tendency
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Research on Development Tendency of College Campus Environmental Landscape Design in China
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作者 FAN Lifei 《Journal of Landscape Research》 2012年第9期71-74,共4页
At the background that existing colleges largely construct campuses,the paper has illustrated the importance,significance and function of college campus environmental landscape design,and factors affecting it.It consi... At the background that existing colleges largely construct campuses,the paper has illustrated the importance,significance and function of college campus environmental landscape design,and factors affecting it.It considers that college campuses tend to be developed into green ecological campus,regional humanistic campus,and knowledge research campus.Finally,by taking the East Lake Campus of Zhejiang A & F University for example,the campus division planning and scientific achievements' application planning have been illustrated. 展开更多
关键词 COLLEGE CAMPUS LANDSCAPE ENVIRONMENTAL design Development tendency
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Research and Review on the Java Multi-thread Programming and Its Further Development Tendency
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作者 Jiangtao Geng 《International Journal of Technology Management》 2016年第5期4-6,共3页
In this paper, we conduct research on the Java multi-thread programming and its further development tendency. Multithreading mechanisms can run several programs at the same time, make the program run effi ciency becom... In this paper, we conduct research on the Java multi-thread programming and its further development tendency. Multithreading mechanisms can run several programs at the same time, make the program run effi ciency becomes higher that also can overcome the problem of basic traditional programming language design while its design is the key to the realization of the synchronous thread. Multithreading is a mechanism that allows concurrent execution of multiple instruction stream in the program, each instruction stream is called a thread, independent from each other between each other. Thread is also known as a lightweight process, it have independent execution and process control. Our research starts from the analysis of the corresponding mechanism to enhance the performance that is innovative and meaningful. 展开更多
关键词 REVIEW MULTI-THREAD Development tendency PROGRAMMING COMPUTER SCIENCE
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Research on the Tendency of Consumer Online Shopping Based on Improved TOPSIS Method
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作者 Yuekun Ma Pengfei Liu Donghuan Huang 《国际计算机前沿大会会议论文集》 2015年第B12期76-78,共3页
Analyzing and predicting the tendency of consumers online shopping is the precondition of providing personalized recommendation service,and has attracted more and more attentions.Most of e-commerce platform shave vari... Analyzing and predicting the tendency of consumers online shopping is the precondition of providing personalized recommendation service,and has attracted more and more attentions.Most of e-commerce platform shave various types of products,and there exists tremendous difference in consumers’occupation,education background and other personalized features.This Paper realizes a TOPSIS Method which is based on entropy and fuzzy numbers.Compared to the traditional TOPSIS method,with the Association Rules mining method of data mining,the improved TOPSIS solves the problem in traditional TOPSIS method which requires manual intervention during execution.In this study,to implement intelligent tendency predicting and analysis of consumers online shopping based on data driven,three steps is carried out.Firstly,the data mining method is leveraged to obtain the fuzzy weights of evaluation indicator through analyzing the electric business transaction data,and then a fuzzy decision-making matrix is established between product and consumer’s attribute;finally,a product category sequence which can indicate the tendency of consumer online shopping is established through calculating. 展开更多
关键词 PURCHASE tendency ENTROPY Fuzzy TOPSIS Data MINING
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Effect of dialectical behavior therapy on the serum neurotransmitters and cytokines in depression patients with suicidal tendency
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作者 Chun-Yan Yin 《Journal of Hainan Medical University》 2017年第24期147-150,共4页
Objective: To explore the effect of dialectical behavior therapy on the serum neurotransmitters and cytokines in depression patients with suicidal tendency. Methods: A total of 98 depression patients with suicidal ten... Objective: To explore the effect of dialectical behavior therapy on the serum neurotransmitters and cytokines in depression patients with suicidal tendency. Methods: A total of 98 depression patients with suicidal tendency who were treated in the hospital between August 2014 and August 2017 were collected and divided into the control group (n=49) and the research group (n=49) by random number table. Control group received routine drug therapy, and study group received dialectical behavior therapy combined with drug therapy. The differences in serum levels of monoamine neurotransmitters, nerve function indexes and acute phase proteins were compared between the two groups of patients. Results: After treatment, serum NE, 5-HT and DA levels of research group were higher than those of control group;serum MBP and NSE levels of research group were lower than those of control group while BDNF level was higher than that of control group;serum Tf level of research group was higher than that of control group while Hp level was lower than that of control group. Conclusion: Dialectical behavior therapy intervention can effectively optimize the nerve function and improve the overall state of depression patients with suicidal tendency. 展开更多
关键词 DEPRESSION SUICIDAL tendency DIALECTICAL behavior therapy NEUROTRANSMITTER
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VATdt: Visual Assessment of Cluster Tendency Using Diagonal Tracing
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作者 Yingkang Hu 《American Journal of Computational Mathematics》 2012年第1期27-41,共15页
The visual assessment of tendency (VAT) technique, for visually finding the number of meaningful clusters in data, developed by J. C. Bezdek, R. J. Hathaway and J. M. Huband, is very useful, but there is room for impr... The visual assessment of tendency (VAT) technique, for visually finding the number of meaningful clusters in data, developed by J. C. Bezdek, R. J. Hathaway and J. M. Huband, is very useful, but there is room for improvements. Instead of displaying the ordered dissimilarity matrix (ODM) as a 2D gray-level image for human interpretation as is done by VAT, we trace the changes in dissimilarities along the diagonal of the ODM. This changes the 2D data structure (matrices) into 1D arrays, displayed as what we call the tendency curves, which enables one to concentrate only on one variable, namely the height. One of these curves, called the d-curve, clearly shows the existence of cluster structure as patterns in peaks and valleys, which can be caught not only by human eyes but also by the computer. Our numerical experiments showed that the computer can catch cluster structures from the d-curve even in some cases where the human eyes see no structure from the visual outputs of VAT. And success on all numerical experiments was obtained us- ing the same (fixed) set of program parameter values. 展开更多
关键词 CLUSTERING DISSIMILARITY Measures Data Visualization CLUSTERING tendency
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Symmetry and tendency judgment of Ms≥8. 0 strong earthquakes in Chile 被引量:12
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作者 Jin Junfang Yin Shuyan Yan Junping 《Geodesy and Geodynamics》 2014年第1期34-40,共7页
The Ms ≥ 8.0 strong earthquakes occurring in Chile since 1800 were analyzed using the ternary, quaternary, and quinary commensurability methods and the butterfly structure diagram, and it was believed that the earthq... The Ms ≥ 8.0 strong earthquakes occurring in Chile since 1800 were analyzed using the ternary, quaternary, and quinary commensurability methods and the butterfly structure diagram, and it was believed that the earthquake signal in Chile in 2014 is relatively strong, a large earthquake is likely to occur in Chile in 2014. An analysis of spatial epicenter migrations showed that the longitudinal and latitudinal epicenter migra- tions have symmetry and synchronism, and there were five obvious northward migrations and four southward migrations. The symmetry axis of the longitudinal migrations is at about 71.7°W and that of the latitudinal mi- grations is at about 30°S; these spatial symmetry axes are located at the subduction zone on the western margin of South America, where two major plates (the Nazca Plate and the South American Plate) converge. 展开更多
关键词 SYMMETRY tendency judgment COMMENSURABILITY butterfly structure Chile
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Sensitivity to Tendency Perturbations of Tropical Cyclone Short-range Intensity Forecasts Generated by WRF 被引量:8
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作者 Xiaohao QIN Wansuo DUAN Hui XU 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2020年第3期291-306,共16页
The present study uses the nonlinear singular vector(NFSV)approach to identify the optimally-growing tendency perturbations of the Weather Research and Forecasting(WRF)model for tropical cyclone(TC)intensity forecasts... The present study uses the nonlinear singular vector(NFSV)approach to identify the optimally-growing tendency perturbations of the Weather Research and Forecasting(WRF)model for tropical cyclone(TC)intensity forecasts.For nine selected TC cases,the NFSV-tendency perturbations of the WRF model,including components of potential temperature and/or moisture,are calculated when TC intensities are forecasted with a 24-hour lead time,and their respective potential temperature components are demonstrated to have more impact on the TC intensity forecasts.The perturbations coherently show barotropic structure around the central location of the TCs at the 24-hour lead time,and their dominant energies concentrate in the middle layers of the atmosphere.Moreover,such structures do not depend on TC intensities and subsequent development of the TC.The NFSV-tendency perturbations may indicate that the model uncertainty that is represented by tendency perturbations but associated with the inner-core of TCs,makes larger contributions to the TC intensity forecast uncertainty.Further analysis shows that the TC intensity forecast skill could be greatly improved as preferentially superimposing an appropriate tendency perturbation associated with the sensitivity of NFSVs to correct the model,even if using a WRF with coarse resolution. 展开更多
关键词 sensitivity tendency perturbation tropical cyclone INTENSITY forecasts
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Status Quo,Development,Tendency,and to be Solved Problems of Pilot Boat in China
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作者 Yibin Li 《现代交通(中英文版)》 2022年第1期11-15,共5页
Pilot boat is the main means and essential equipment of transport during ships transferring pilot.Ensuring pilot embarking or disembarking the ship on time is important for regulating port operation and ship’s safety... Pilot boat is the main means and essential equipment of transport during ships transferring pilot.Ensuring pilot embarking or disembarking the ship on time is important for regulating port operation and ship’s safety.However,the pilot boat is a very small number of ship’s type whether domestic or abroad.This paper discusses the issues of pilot boat to be drawn attentions and solved,and proposes some recommendations for solving the pilot boat issues. 展开更多
关键词 Pilot Boat Status Quo DEVELOPMENT tendency High-speed Boat Minimum Safety Manning
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