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Psychological Support for Public-Funded Normal Students Engaged in Teaching Profession
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作者 Shize Zhi 《International Journal of Mental Health Promotion》 2022年第6期883-900,共18页
Among primary and secondary school teachers in China, 70% of teachers believe facing more significant occupationalpressure. 63.8% of teachers clearly stated that occupational stress had caused a tremendous impact on t... Among primary and secondary school teachers in China, 70% of teachers believe facing more significant occupationalpressure. 63.8% of teachers clearly stated that occupational stress had caused a tremendous impact on them.And this has had adverse effects on them, such as mental, physical, and personal development. This paper studiesthe group of public-funded regular students from the perspective of psychological support. This paper uses theSCL-90 form to investigate the professional psychology of teachers for the psychological support of public-fundedregular students engaged in the teaching profession. And it conducts a survey on the curriculum setting and satisfactionof the public-funded regular students during their study stage. The experimental results of this paper showthat only 11.9% of public-funded regular students are very willing to take root and serve township education.Moreover, the psychological pressure of teachers at different educational stages is quite different. 展开更多
关键词 Public-funded normal students teaching profession psychological support investigation and analysis
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Research fronts and researchers of World Journal of Psychiatry in 2023: A visualization and analysis of mapping knowledge domains
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作者 Yun-Tian Xie Yu-Jing Yang 《World Journal of Psychiatry》 SCIE 2024年第7期1118-1126,共9页
BACKGROUND In the rapidly evolving landscape of psychiatric research,2023 marked another year of significant progress globally,with the World Journal of Psychiatry(WJP)experiencing notable expansion and influence.AIM ... BACKGROUND In the rapidly evolving landscape of psychiatric research,2023 marked another year of significant progress globally,with the World Journal of Psychiatry(WJP)experiencing notable expansion and influence.AIM To conduct a comprehensive visualization and analysis of the articles published in the WJP throughout 2023.By delving into these publications,the aim is to deter-mine the valuable insights that can illuminate pathways for future research endeavors in the field of psychiatry.METHODS A selection process led to the inclusion of 107 papers from the WJP published in 2023,forming the dataset for the analysis.Employing advanced visualization techniques,this study mapped the knowledge domains represented in these papers.RESULTS The findings revealed a prevalent focus on key topics such as depression,mental health,anxiety,schizophrenia,and the impact of coronavirus disease 2019.Additionally,through keyword clustering,it became evident that these papers were predominantly focused on exploring mental health disorders,depression,anxiety,schizophrenia,and related factors.Noteworthy contributions hailed authors in regions such as China,the United Kingdom,United States,and Turkey.Particularly,the paper garnered the highest number of citations,while the American Psychiatric Association was the most cited reference.CONCLUSION It is recommended that the WJP continue in its efforts to enhance the quality of papers published in the field of psychiatry.Additionally,there is a pressing need to delve into the potential applications of digital interventions and artificial intelligence within the discipline. 展开更多
关键词 World Journal of Psychiatry PSYCHIATRY Mapping knowledge domains VISUALIZATION ANALYSIS
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An Empirical Study of the Socratic Method in Nongraded English Teaching in Senior High School Under the Background of the New National College Entrance Examination
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作者 Chen Yilong 《Contemporary Social Sciences》 2024年第2期139-155,共17页
With the reform of the New National College Entrance Examination(Gaokao),the nongraded education will become an inevitable trend.In senior high school,the traditional test-oriented education is popular.The knowledge i... With the reform of the New National College Entrance Examination(Gaokao),the nongraded education will become an inevitable trend.In senior high school,the traditional test-oriented education is popular.The knowledge is mainly taught by the teachers,and the students passively absorb it.This study examines a problem-oriented Socratic experiment in nongraded English teaching in senior high school.The teachers seek output from students,who respond by interpreting questions,fostering critical thinking,and enhancing problem-solving skills.This teaching experiment indicates that the Socratic method has a significant positive effect on cultivating nongraded senior high English students’critical thinking under the New National College Entrance Examination. 展开更多
关键词 new national college entrance examination nongraded education exercise teaching Socratic method
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Even and Odd Q-coherent State Representations of the Q-deformed Heisenberg-Weyl Algebra 被引量:4
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作者 WANG Fabo KUANG Leman 《Chinese Physics Letters》 SCIE CAS CSCD 1992年第12期629-632,共4页
We construct explicitly even and odd q-coherent states.These q-coherent states are introduced in terms of the q-functions defined in the paper.It is shown that the even and odd q-coherent states form a kind of represe... We construct explicitly even and odd q-coherent states.These q-coherent states are introduced in terms of the q-functions defined in the paper.It is shown that the even and odd q-coherent states form a kind of representations of the q-deformed Heisenberg-Weyl algebra which is realized in the form of matrix q-differential operators in the even and odd q-coherent state space.We also analyse some different between the even and odd q-CSs and the usual even and odd CSs. 展开更多
关键词 space. coherent DEFORMED
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Effect of sub-cloud evaporation on the δ^18O of precipitation in Qilian Mountains and Hexi Corridor, China 被引量:4
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作者 ZongXing Li Qi Feng +3 位作者 YaMin Wang JianGuo Li XiaoYan Guo YongGe Li 《Research in Cold and Arid Regions》 CSCD 2016年第5期378-387,共10页
The sub-cloud evaporation effect refers to the evaporation process for raindrops that fall from the cloud base to the ground, which is usually accompanied by depleted light isotopes and enriched heavy isotopes in the ... The sub-cloud evaporation effect refers to the evaporation process for raindrops that fall from the cloud base to the ground, which is usually accompanied by depleted light isotopes and enriched heavy isotopes in the precipitation. Based on 461 event-based precipitation samples collected from 12 weather stations in the Qilian Mountains and the Hexi Corridor from May to August of 2013, our results indicated that sub-cloud evaporation has a great influence on the δ^18O of precipitation, especially in small-amount precipitation events. In May, June, July, and August the δ18O composition was enriched by 35%, 26%, 39%, and 41%, respectively, from the cloud base to the ground. This influence clearly strengthened with temperature rise, from the Qilian Mountains to the Hexi Corridor. When falling raindrops are evaporated by 1.0% in the Qilian Mountains and the Hexi Corridor, the composition of δ18O would be enriched by 1.2% and 2.6%, respectively. Temperature dominated the sub-cloud evaporation in the Qilian Mountains, whereas relative humidity controlled it in the Hexi Corridor. These results provide new proofs of the evolutional process of stable isotopes in precipitation in arid regions. 展开更多
关键词 sub-cloud evaporation PRECIPITATION stable isotope Qilian Mountains
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Review on plasmon induced transparency based on metal-dielectric-metal waveguides 被引量:2
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作者 DENG Hong-gui TIAN Li-li +4 位作者 XIONG Ru-jing LIU Gang YANG Kai ZHAO Hao-hao WANG Wen-hui 《Journal of Central South University》 SCIE EI CAS CSCD 2020年第3期698-710,共13页
Plasmon induced transparency(PIT)in the transparent window provides new insights into the design of optical filters,switches and storage,and integrated optics.The slow light effect makes PIT applicable to both sensors... Plasmon induced transparency(PIT)in the transparent window provides new insights into the design of optical filters,switches and storage,and integrated optics.The slow light effect makes PIT applicable to both sensors and slow light devices.Besides,PIT can overcome the diffraction limit of light,which makes it possible to manipulate light on a half-wavelength scale and brings good news to the miniaturization of optical devices.In this paper,we first summarize the researches of PIT phenomenon based on metal-dielectric-metal(MDM)waveguide systems and analyze the physical mechanisms of PIT including bright-dark mode interactions and phase-coupling-induced transparency.Then,we review the applications of PIT in optical sensing,optical filtering,optical switching,slow light devices and optical logic devices.At last,we outline important challenges that need to be addressed,provide corresponding solutions and predict important directions for future research in this area. 展开更多
关键词 plasmon induced transparency(PIT) metal-dielectric-metal(MDM)waveguide slow-light effect optical logic devices
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Selective conversion of biomass-derived furfuryl alcohol into n-butyl levulinate over sulfonic acid functionalized TiO_(2) nanotubes 被引量:3
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作者 Shuolin Zhou Jinhua Lai +4 位作者 Xianxiang Liu Geng Huang Gaolin You Qiong Xu Dulin Yin 《Green Energy & Environment》 SCIE EI CSCD 2022年第2期257-265,共9页
Sulfonic acid functionalized titanate nanotubes were prepared by the sulphonation reaction of hydrothermally synthesized TiO_(2) nanotubes(TNTs) using chlorosulfonic acid as the sulfating agent.The as-prepared catalys... Sulfonic acid functionalized titanate nanotubes were prepared by the sulphonation reaction of hydrothermally synthesized TiO_(2) nanotubes(TNTs) using chlorosulfonic acid as the sulfating agent.The as-prepared catalysts were characterized by fourier transform infrared(FT-IR)spectroscopy,transmission electron microscopy(TEM),scanning electron microscopy-energy dispersive X-ray spectroscopy(SEM-EDX),Xray diffraction(XRD) analysis,thermogravimetry-differential thermal gravimetry(TG-DTG) and X-ray photoelectron spectroscopy(XPS)techniques.The characterization results revealed that the catalysts retained the tubular structure of the TNTs and possessed a large number of active sulfonic acid sites.The catalytic performance of the catalysts for the synthesis of n-butyl levulinate was investigated via the alcoholysis of biomass-derived furfuryl alcohol under atmospheric pressure.The effects of the reaction factors such as the catalyst dosage,reaction time,and temperature on the alcoholysis of the furfuryl alcohol were systematically studied.Under mild conditions,about 79.9% yield of n-butyl levulinate was achieved.In addition,the catalysts showed a stable catalytic performance after four consecutive cycles.Furthermore,no leaching of the active species was observed during the hot filtration testing,which can be attributed to the covalently linked –SO_(3)H groups on the TNTs surface.In addition,the opened tubular nanostructure of the catalyst and the introduced strong Br?nsted acid sites exhibited synergistic effects,which facilitated the selective conversion of the furfuryl alcohol to butyl levulinate. 展开更多
关键词 surface ALCOHOL functional
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竞赛用灭火机器人控制技术研究与实现 被引量:1
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作者 张博 刘传武 《微型电脑应用》 2016年第8期21-23,共3页
灭火机器人比赛场地中顺利完成灭火任务,需要依靠一套稳定、完善的搜寻火焰并有效熄灭火焰的路径。该机器人采用C51单片机为主控芯片,结合使用步进电机和火焰传感器来判断火源位置,利用超声波测距传感器与直流电机完成机器人的行走和自... 灭火机器人比赛场地中顺利完成灭火任务,需要依靠一套稳定、完善的搜寻火焰并有效熄灭火焰的路径。该机器人采用C51单片机为主控芯片,结合使用步进电机和火焰传感器来判断火源位置,利用超声波测距传感器与直流电机完成机器人的行走和自动避障等功能。在控制算法上,采用"左右手定则"和无火不入房的策略,提高了寻找火源的效率。实际应用表明,该机器人具有开放性好,快速、准确灭火的良好性能。 展开更多
关键词 灭火机器人 智能优化 传感器 控制算法
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β—半可微k—集压缩映射的正不动点定理及其在传染病模型中的应用
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作者 刘威九 《高校应用数学学报(A辑)》 CSCD 北大核心 1992年第1期 91-101,共11页
In this paper we define the new concept of β -semidifferentiability of a mapping and obtain the positive fixed point theorems for β -semidifferentiable k -set-contractive mappings. Then the theorems are ap-plied to ... In this paper we define the new concept of β -semidifferentiability of a mapping and obtain the positive fixed point theorems for β -semidifferentiable k -set-contractive mappings. Then the theorems are ap-plied to the nonlinear integral equation, x(t) = (s,x(s))ds , which can be interpreted as a modelfor the spread of certain infectious diseases, and the existence theorems of the positive solutions and positive eigenvalues for the equation are obtained. 展开更多
关键词 压缩映射 正不动点定理 传染病模型
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Improving entanglement of assistance by local parity–time symmetric operation
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作者 Zhi He Zun-Yan Nie Qiong Wang 《Chinese Physics B》 SCIE EI CAS CSCD 2019年第12期92-98,共7页
We investigate entanglement of assistance without and with decoherence using a local non-Hermitian operation, i.e.,parity–time(PT) symmetric operation. First we give the explicit expressions of entanglement of assist... We investigate entanglement of assistance without and with decoherence using a local non-Hermitian operation, i.e.,parity–time(PT) symmetric operation. First we give the explicit expressions of entanglement of assistance for a general W-like state of a three-qubit system under a local parity–time symmetric operation. Then for a famous W state without decoherence, we find that entanglement of assistance shared by two parties can be obviously enhanced with the assistance of the third party by a local parity–time symmetric operation. For the decoherence case, we provide two schemes to show the effects of local parity–time symmetric operation on improvement of entanglement of assistance against amplitude damping noise. We find that for the larger amplitude damping case the scheme of PT symmetric operation performed on one of two parties with the influence of noise is superior to that of PT symmetric operation performed on the third party without the influence of noise in suppressing amplitude damping noise. However, for the smaller amplitude damping case the opposite result is given. The obtained results imply that the local PT symmetric operation method may have potential applications in quantum decoherence control. 展开更多
关键词 entanglement of assistance local parity–time symmetric operation amplitude damping noise
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An Empirical Study of the Effect of Inquiry Teaching on the Development of High School Students'Critical Thinking Under the New Curriculum Standards
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作者 Chen Yilong Peng Jia 《Contemporary Social Sciences》 2023年第2期130-145,共16页
The Ministry of Education of the People’s Republic of China has issued three guideline documents to encourage inquiry teaching to help students develop their ability to question,which is a defining feature of critica... The Ministry of Education of the People’s Republic of China has issued three guideline documents to encourage inquiry teaching to help students develop their ability to question,which is a defining feature of critical thinking.Two of the documents have clearly stated that English subject teaching should focus on building students’thinking capacity.Critical thinking is an essential feature of building thinking capacity and a key element of the core competencies the English subject seeks to cultivate.This research measures the performance of students of two high school classes in the exams conducted at the beginning,in the middle,and at the end of the experiment period during which inquiry teaching was applied to enhance students’critical thinking ability.The experiment results show that inquiry teaching can improve students’academic performance in English study and help them better develop their language skills.The implementation of the inquiry design in teaching listening,reading,and writing conforms to the law that governs the development of critical thinking,and the adoption of inquiry teaching can promote the development of critical thinking. 展开更多
关键词 new curriculum standards inquiry method high school English learning critical thinking
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Combined soft measurement on key indicator parameters of new competitive advantages for China’s export
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作者 Taosheng Wang Hongyan Zuo +1 位作者 C.H.Wu B.Hu 《Financial Innovation》 2021年第1期1100-1123,共24页
The estimation of the difference between the new competitive advantages of China’s export and the world’s trading powers have been the key measurement problems in China-related studies.In this work,a comprehensive e... The estimation of the difference between the new competitive advantages of China’s export and the world’s trading powers have been the key measurement problems in China-related studies.In this work,a comprehensive evaluation index system for new export competitive advantages is developed,a soft-sensing model for China’s new export competitive advantages based on the fuzzy entropy weight analytic hierarchy process is established,and the soft-sensing values of key indexes are derived.The obtained evaluation values of the main measurement index are used as the input variable of the fuzzy least squares support vector machine,and a soft-sensing model of the key index parameters of the new export competitive advantages of China based on the combined soft-sensing model of the fuzzy least squares support vector machine is established.The soft-sensing results of the new export competitive advantage index of China show that the soft measurement model developed herein is of high precision compared with other models,and the technical and brand competitiveness indicators of export products have more significant contributions to the new competitive advantages of China’s export,while the service competitiveness indicator of export products has the least contribution to new competitive advantages of China’s export. 展开更多
关键词 China’s export New competitive advantages Export competitive advantage Core competitiveness Fuzzy least squares support vector machine Soft measurement
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The Discontinuity of Kindergarten Teachers' Growth——Analysis Based on Bollnow' s Thoughts of "Discontinuous Education"
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作者 SUN Shucun 《International English Education Research》 2018年第4期1-3,共3页
The discontinuous educational thoughts of Bollnow have provided a new perspective for our exploring the growth of Kindergarten teachers and We can rethink the drawbacks of linear development and static thinking with i... The discontinuous educational thoughts of Bollnow have provided a new perspective for our exploring the growth of Kindergarten teachers and We can rethink the drawbacks of linear development and static thinking with it. Kindergarten teachers' growth is the unity of continuity and discontinuity. "Crisis", "encounter", "awaking" and "exhortation" all can break off the continuity of professional growth of kindergarten teachers, put kindergarten teachers' growth into the stage of discontinuity, promote the kindergarten teachers to make a positive self adjustment in shocks, and open up a new stage for kindergarten teachers' growth. In order to promote kindergarten teachers' active self adjustment in shock, and impel kindergarten teachers to step out oftheir"comfort zone", preschool teachers should try their best to overcome the tendency of"comfort zone" and strengthen the spirit of reflection. The kindergarten should create a rich and colorful cultural environment, and establish a cooperative research community for kindergarten teachers. 展开更多
关键词 professional growth of kindergarten teachers Bollnow' s "discontinuous educational" thoughts: discontinuity
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Resilience Training of Preschool Children Based on Traditional Folk Games
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作者 Daoyuan Li 《Journal of Contemporary Educational Research》 2021年第8期136-143,共8页
Traditional folk games inherit the history,culture and identity of a country and nation,and they have even more important meanings for China,which has a long history and many ethnic groups.However,with the rapid globa... Traditional folk games inherit the history,culture and identity of a country and nation,and they have even more important meanings for China,which has a long history and many ethnic groups.However,with the rapid globalization of modem technology and economy,many Chinese traditional folk games are facing the crisis of disappearing.This article discusses how to develop and utilize the new functions of traditional folk games.That is to use them to train the resilience of preschool children,thus to initiate a new understanding of traditional folk games by teachers and parents.The article firstly discusses the importance of cultivating preschool children's resilience,then analyzes the role of games in cultivating preschool children's resilience,studies the traditional folk game classification method for preschool children's resilience,and gives the development orientation traditional folk game teaching strategies and steps for the cultivation of resilience.This research not only inherits Chinese traditional culture in preschool education,but also trains preschool children's resilience and strengthens their minds.It has important practical significance and reference value for the current training and education of preschool children in China and East Asia. 展开更多
关键词 Traditional Folk Games Resilience training Preschool children
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Four New Terpyridine Complexes Based Polyoxometalates with[W_(10)O_(32)]^(4-) Anions as High-Efficiency Dual-Site Catalysis for Thioether Oxidation Reaction
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作者 Yin Zhang Wei-Dong Yu +4 位作者 Fang-Qian Wang Xiangnan Wang Jiawan Zhou Chao Liu Jun Yan 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2024年第6期592-598,共7页
Polyoxometalates modified with complex cations have attracted increasing attention because of the fascinating properties and the controllable structures.By adjusting the synthesis conditions,four new terpyridine compl... Polyoxometalates modified with complex cations have attracted increasing attention because of the fascinating properties and the controllable structures.By adjusting the synthesis conditions,four new terpyridine complexes based hybrid POMs,[(TPY-H)CuCl]_(4)[W_(10)O_(32)]·2DMF·2H_(2)O(1),[(TPY-H)Cu(DMSO)(H_(2)O)]_(2)[W_(10)O_(32)]·2H_(2)O(2),[(TPY-H)_(2)Cu]_(2)[W_(10)O_(32)]·6DMSO·8H_(2)O(3) and[(TPY-Br)CuCl(DMSO)(H_(2)O)]_(2)[(TPY-Br)CuCl]_(2)[W_(10)O_(32)]·2DMSO·4H_(2)O(4),were prepared by using‘one-pot’method.Sing-crystal X-ray diffraction analyses,infrared radiation,etc.,revealed the structural composition of compounds 1—4,which indicates that synthesis conditions have a directional regulatory effect on the compounds synthesis.Thioether oxidation catalytic reactions show 1—4 have good catalytic activities,and powder X-ray diffraction and thermogravimetry analysis show 1—4 have superduper catalytic stability.Moreover,4 has better catalytic activity because of the different structure of terpyridine complexes.Therefore,a possible mechanism of dual-site catalysis by both cations and anions is proposed. 展开更多
关键词 POLYOXOMETALATES Terpyridine complexes Thioether oxidation Dual-site catalysis Clusters
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Root cause of corrosion failure of tin coating on wire clamp in marine atmosphere
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作者 Zhen Zhong Wang-yan Ly +6 位作者 Teng-yuan Liu Yi Xie Yang Yang Zhen-zhu Wang Deng-ke Li Xiao-bo Li Tang-qing Wu 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2024年第4期998-1014,共17页
The failure cause of a tinned copper wire clamp in marine atmosphere was studied systematically by X-ray photoelectron spectroscopy,scanning electron microscopy with energy dispersive spectroscopy and electrochemical ... The failure cause of a tinned copper wire clamp in marine atmosphere was studied systematically by X-ray photoelectron spectroscopy,scanning electron microscopy with energy dispersive spectroscopy and electrochemical measurements.The main components of the green rust on the surface of the damaged wire clamp are SnO_(2),CuO,Cu_(2)Cl(OH)_(3) and CuCO(OH)_(2).Much of green rust distributes at the platform edge along the axial direction on the crimp connection,and severe corrosion and corrosion pits occur at the platform edge zone along the axial direction.The enriching Cl-at the marine atmosphere and the existing O_(2) in air collectively enhance the corrosion process of the tin coating and the copper matrix.Finite element model results show that the residual stress and strain of the tin coating are the largest at the platform edge along the axial direction on the crimp connection,and the corresponding electrode potential of the tin coating at this zone drops significantly.The above results indicate that the residual strain increases the driving force of the corrosion electrochemical reactions and accelerates the corrosion rate and the pit corrosion of the tin coating at this zone. 展开更多
关键词 Tin coating Marine atmosphere Residual strain-Chloride ion Corrosion failure
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Stability Analysis of Nonlinear Networked Control System with Integral Quadratic Constraints Performance in Takagi-Sugeno Fuzzy Model 被引量:2
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作者 PENG Gaofeng LIU Hongping +2 位作者 LENG Yang WANG Yong ZHAO Na 《Wuhan University Journal of Natural Sciences》 CAS CSCD 2019年第5期435-441,共7页
This paper focuses on the stability analysis of nonlinear networked control system with integral quadratic constraints(IQC) performance, dynamic quantization, variable sampling intervals, and communication delays. By ... This paper focuses on the stability analysis of nonlinear networked control system with integral quadratic constraints(IQC) performance, dynamic quantization, variable sampling intervals, and communication delays. By using input-delay and parallel distributed compensation(PDC) techniques, we establish the Takagi-Sugeno(T-S) fuzzy model for the system, in which the sampling period of the sampler and signal transmission delay are transformed to the refreshing interval of a zero-order holder(ZOH). By the appropriate Lyapunov-Krasovskii-based methods, a delay-dependent criterion is derived to ensure the asymptotic stability for the system with IQC performance via the H∞ state feedback control. The efficiency of the method is illustrated on a simulation exampler. 展开更多
关键词 H∞ OUTPUT TRACKING CONTROL nonlinear NETWORKED CONTROL systems TAKAGI-SUGENO fuzzy model LyapunovKrasovskii method
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THREE-POINT TRANSITION FUNCTIONS FOR TWO-PARAMETER MARKOV CHAINS AND THEIR FOUR SYSTEMS OF PARTIAL DIFFERENTIAL EQUATIONS 被引量:2
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作者 郭军义 杨向群 《Science China Mathematics》 SCIE 1992年第7期806-818,共13页
Analytic properties of three-point transition functions for wide-past Markov chains with two parameters are investigated. The concept "Standardness" is introduced. For standard three-point transition functio... Analytic properties of three-point transition functions for wide-past Markov chains with two parameters are investigated. The concept "Standardness" is introduced. For standard three-point transition functions, four systems of leftward, rightward, downward and upward partial differential equations are derived. 展开更多
关键词 wide-past MARKOV CHAIN FAMILY of three-point transition functions standardness.
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A recollement construction of Gorenstein derived categories
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作者 Peng YU 《Frontiers of Mathematics in China》 SCIE CSCD 2018年第3期691-713,共23页
We first give an equivalence between the derived category of a locally finitely presented category and the derived category of contravariant functors from its finitely presented subcategory to the category of abelian ... We first give an equivalence between the derived category of a locally finitely presented category and the derived category of contravariant functors from its finitely presented subcategory to the category of abelian groups, in the spirit of Krause's work [Math. Ann., 2012, 353: 765-781]. Then we provide a criterion for the existence of recollement of derived categories of functor categories, which shows that the recollement structure may be induced by a proper morphism defined in finitely presented subcategories. This criterion is then used to construct a recollement of derived category of Gorenstein injective modules over CM-finite 2-Gorenstein artin algebras. 展开更多
关键词 Recollements functor categories derived categories Gorenstein algebras weak excellent extension locally finitely presented categories
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Multiple Bifurcations of Critical Period for a Quartic Kolmogorov Model
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作者 Chao-xiong DU Wen-tao HUANG 《Acta Mathematicae Applicatae Sinica》 SCIE CSCD 2021年第4期673-681,共9页
Our work is concerned with the bifurcation of critical period for a quartic Kolmogorov system.By computing the periodic constants carefully,we show that point(1,1)can be a weak center of fourth order,and the weak cent... Our work is concerned with the bifurcation of critical period for a quartic Kolmogorov system.By computing the periodic constants carefully,we show that point(1,1)can be a weak center of fourth order,and the weak centers condition is given.Moreover,point(1,1)can bifurcate 4 critical periods under a certain condition.In terms of multiple bifurcation of critical periodic problem for Kolmogorov model,studied results are less seen,our work is good and interesting. 展开更多
关键词 singular values weak center periodic constants bifurcation of critical period
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