A class of Beddington-DeAngelis＇ type predator-prey dynamic system with prey and predator both having linear density restriction is considered. By using the qualitative methods of ODE, the existence and uniqueness of...A class of Beddington-DeAngelis＇ type predator-prey dynamic system with prey and predator both having linear density restriction is considered. By using the qualitative methods of ODE, the existence and uniqueness of positive equilibrium and its global asymptotic stability are analyzed. The direct criterions for local stability of positive equilibrium and existence of limit cycle are also established when inference parameter of predator is small.展开更多
This paper deals with the questio n of global stability of the positive locally asymptotically stable equilibrium in a class of predator\|prey system of Gause\|typ e with Holling Ⅲ functional response. The Dulac'...This paper deals with the questio n of global stability of the positive locally asymptotically stable equilibrium in a class of predator\|prey system of Gause\|typ e with Holling Ⅲ functional response. The Dulac's criterion is applied and lia punov functions are constructed to establish the global stability.展开更多
Phaeocystis globosa is an important unicellular eukaryotic alga that can also form colonies.P.globosa can cause massive harmful algal blooms and plays an important role in the global carbon or sulfur cycling.Thus far,...Phaeocystis globosa is an important unicellular eukaryotic alga that can also form colonies.P.globosa can cause massive harmful algal blooms and plays an important role in the global carbon or sulfur cycling.Thus far,the ecophysiology of P.globosa has been investigated by numerous studies.However,the proteomic response of P.globosa to nitrogen depletion remains largely unknown.We compared four protein preparation methods of P.globosa for two-dimensional electrophoresis(2-DE)(Urea/Triton X-100 with trichloroacetic acid(TCA)/acetone precipitation;TCA/acetone precipitation;Radio Immuno Precipitation Assay(RIPA)with TCA/acetone precipitation;and Tris buffer).Results show that the combination of RIPA with TCA/acetone precipitation had a clear gel background and showed the best protein spot separation effect,based on which the proteomic response to nitrogen depletion was studied using 2-DE.In addition,we identified six differentially expressed proteins whose relative abundance increased or decreased more than 1.5-fold(P<0.05).Most proteins could not be identified,which might be attributed to the lack of genomic sequences of P.globosa.Under nitrogen limitation,replication protein-like,RNA ligase,and sn-glycerol-3-phosphate dehydrogenase were reduced,which may decrease the DNA replication level and ATP production in P.globosa cells.The increase of endonucleaseⅢand transcriptional regulator enzyme may affect the metabolic and antioxidant function of P.globosa cells and induce cell apoptosis.These findings provide a basis for further proteomic study of P.globosa and the optimization of protein preparation methods of marine microalgae.展开更多
The current design philosophy for submarine hulls,in the preliminary design stage,generally considers as governing limit states material yielding along with various buckling modes.It is common belief that,beyond the d...The current design philosophy for submarine hulls,in the preliminary design stage,generally considers as governing limit states material yielding along with various buckling modes.It is common belief that,beyond the design pressure,material yielding of the shell plating should occur first,eventually followed by local buckling,while global buckling currently retains the highest safety factor.On the other hand,in the aeronautical field,in some cases structural components are designed in such a way that local instability may occur within the design loads,being the phenomena inside the material elastic range and not leading to a significant drop in term of stiffness.This paper is aimed at investigating the structural response beyond a set of selected limit states,using nonlinear FE method adopting different initial imperfection models,to provide the designers with new information useful for calibrating safety factors.It was found that both local and global buckling can be considered as ultimate limit states,with a significant sensitivity towards initial imperfection,while material yielding and tripping buckling of frames show a residual structural capacity.In conclusion,it was found that the occurrence of local buckling leads to similar sudden catastrophic consequences as global buckling,with the ultimate strength capacity highly affected by the initial imperfection shape and amplitude.展开更多
Psychological cognition is an important aspect in human psychology and management. This article is aimed to look at interpersonal emotional management interpersonal emotion management as a theoretical important indica...Psychological cognition is an important aspect in human psychology and management. This article is aimed to look at interpersonal emotional management interpersonal emotion management as a theoretical important indicator of job satisfaction. The main discussion is on how to predict employees’ job satisfaction through the implementation of interpersonal emotion management strategies and the main source of research is review of existing literature. This review addresses the gap in the literature by reviewing the role of interpersonal emotional management on followers’ job performance. This review finds the relationship between interpersonal emotional management which consists of four dimensions: circumstance adjustment,attentional placement,cognitive change,modulation of emotional response and job satisfaction. Overall,this literature review contributes to the interpersonal emotion management and job satisfaction literatures by providing meaningful management implications to the organizations.展开更多
Consider a class of Ivlev＇s type predator-prey dynamic systems with prey and predator both having linear density restricts. By using the qualitative methods of ODE, the global stability of positive equilibrium and ex...Consider a class of Ivlev＇s type predator-prey dynamic systems with prey and predator both having linear density restricts. By using the qualitative methods of ODE, the global stability of positive equilibrium and existence and uniqueness of non-small amplitude stable limit cycle are obtained. Especially under certain conditions, it shows that existence and uniqueness of non-small amplitude stable limit cycle is equivalent to the local un-stability of positive equilibrium and the local stability of positive equilibrium implies its global stability. That is to say, the global dynamic of the system is entirely determined by the local stability of the positive equilibrium.展开更多
目的:调查浙江省公立医院感染控制联络护士(Infection Control Link Nurses,ICLN)岗位职能及需求,为后续ICLN的准入、培养、考核及认证提供依据。方法:2022年5月13日至6月7日,由浙江省护理学会防感染专业委员会牵头,采用自行设计的ICLN...目的:调查浙江省公立医院感染控制联络护士(Infection Control Link Nurses,ICLN)岗位职能及需求,为后续ICLN的准入、培养、考核及认证提供依据。方法:2022年5月13日至6月7日,由浙江省护理学会防感染专业委员会牵头,采用自行设计的ICLN岗位职能问卷对浙江省内11个市37家公立医院的ICLN进行线上问卷调查。结果:共发放1938份问卷,回收率及有效率均为100%。ICLN参与抗生素管理率(24.4%)与主观认同率(39.4%)低;86.9%的ICLN希望医院制度上定期给予排班支持;91.6%的ICLN认为需要院感防控专业知识和技能的培训。结论:浙江省ICLN岗位职能不够明确,需要建立系统的培养和认证体系,优化岗位标准,推进岗位的专科化发展。展开更多
基金Supported by the NNSF of China( 10171044) the Foundation for University Key Teachers of the Ministry of Education of China .
文摘A class of Beddington-DeAngelis＇ type predator-prey dynamic system with prey and predator both having linear density restriction is considered. By using the qualitative methods of ODE, the existence and uniqueness of positive equilibrium and its global asymptotic stability are analyzed. The direct criterions for local stability of positive equilibrium and existence of limit cycle are also established when inference parameter of predator is small.
基金Supported by the National Natural Science Foundation of China(195 310 70 )
文摘This paper deals with the questio n of global stability of the positive locally asymptotically stable equilibrium in a class of predator\|prey system of Gause\|typ e with Holling Ⅲ functional response. The Dulac's criterion is applied and lia punov functions are constructed to establish the global stability.
基金the National Natural Science Foundation of China(Nos.42176142,41906111,41806127)the Marine Economic Development Project of Guangdong Province(No.2023B1111050011)+1 种基金the Basic and Applied Basic Research Project of Guangzhou(Nos.2023A04J1548,2023A04J1549)the Outstanding Innovative Talents Cultivation Funded Programs for Doctoral Students of Jinan University(No.2021CXB010)。
文摘Phaeocystis globosa is an important unicellular eukaryotic alga that can also form colonies.P.globosa can cause massive harmful algal blooms and plays an important role in the global carbon or sulfur cycling.Thus far,the ecophysiology of P.globosa has been investigated by numerous studies.However,the proteomic response of P.globosa to nitrogen depletion remains largely unknown.We compared four protein preparation methods of P.globosa for two-dimensional electrophoresis(2-DE)(Urea/Triton X-100 with trichloroacetic acid(TCA)/acetone precipitation;TCA/acetone precipitation;Radio Immuno Precipitation Assay(RIPA)with TCA/acetone precipitation;and Tris buffer).Results show that the combination of RIPA with TCA/acetone precipitation had a clear gel background and showed the best protein spot separation effect,based on which the proteomic response to nitrogen depletion was studied using 2-DE.In addition,we identified six differentially expressed proteins whose relative abundance increased or decreased more than 1.5-fold(P<0.05).Most proteins could not be identified,which might be attributed to the lack of genomic sequences of P.globosa.Under nitrogen limitation,replication protein-like,RNA ligase,and sn-glycerol-3-phosphate dehydrogenase were reduced,which may decrease the DNA replication level and ATP production in P.globosa cells.The increase of endonucleaseⅢand transcriptional regulator enzyme may affect the metabolic and antioxidant function of P.globosa cells and induce cell apoptosis.These findings provide a basis for further proteomic study of P.globosa and the optimization of protein preparation methods of marine microalgae.
基金The research activity on this topic is still under development in the frame of the ASAMS(Aspetti specialistici e approccio metodologico per progettazione di sottomarini di ultima generazione)project(2019-2022)which has been funded by the Italian MoD–Segredifesa,in collaboration with Fincantieri.
文摘The current design philosophy for submarine hulls,in the preliminary design stage,generally considers as governing limit states material yielding along with various buckling modes.It is common belief that,beyond the design pressure,material yielding of the shell plating should occur first,eventually followed by local buckling,while global buckling currently retains the highest safety factor.On the other hand,in the aeronautical field,in some cases structural components are designed in such a way that local instability may occur within the design loads,being the phenomena inside the material elastic range and not leading to a significant drop in term of stiffness.This paper is aimed at investigating the structural response beyond a set of selected limit states,using nonlinear FE method adopting different initial imperfection models,to provide the designers with new information useful for calibrating safety factors.It was found that both local and global buckling can be considered as ultimate limit states,with a significant sensitivity towards initial imperfection,while material yielding and tripping buckling of frames show a residual structural capacity.In conclusion,it was found that the occurrence of local buckling leads to similar sudden catastrophic consequences as global buckling,with the ultimate strength capacity highly affected by the initial imperfection shape and amplitude.
文摘Psychological cognition is an important aspect in human psychology and management. This article is aimed to look at interpersonal emotional management interpersonal emotion management as a theoretical important indicator of job satisfaction. The main discussion is on how to predict employees’ job satisfaction through the implementation of interpersonal emotion management strategies and the main source of research is review of existing literature. This review addresses the gap in the literature by reviewing the role of interpersonal emotional management on followers’ job performance. This review finds the relationship between interpersonal emotional management which consists of four dimensions: circumstance adjustment,attentional placement,cognitive change,modulation of emotional response and job satisfaction. Overall,this literature review contributes to the interpersonal emotion management and job satisfaction literatures by providing meaningful management implications to the organizations.
文摘Consider a class of Ivlev＇s type predator-prey dynamic systems with prey and predator both having linear density restricts. By using the qualitative methods of ODE, the global stability of positive equilibrium and existence and uniqueness of non-small amplitude stable limit cycle are obtained. Especially under certain conditions, it shows that existence and uniqueness of non-small amplitude stable limit cycle is equivalent to the local un-stability of positive equilibrium and the local stability of positive equilibrium implies its global stability. That is to say, the global dynamic of the system is entirely determined by the local stability of the positive equilibrium.
文摘目的:调查浙江省公立医院感染控制联络护士(Infection Control Link Nurses,ICLN)岗位职能及需求,为后续ICLN的准入、培养、考核及认证提供依据。方法:2022年5月13日至6月7日,由浙江省护理学会防感染专业委员会牵头,采用自行设计的ICLN岗位职能问卷对浙江省内11个市37家公立医院的ICLN进行线上问卷调查。结果:共发放1938份问卷,回收率及有效率均为100%。ICLN参与抗生素管理率(24.4%)与主观认同率(39.4%)低;86.9%的ICLN希望医院制度上定期给予排班支持;91.6%的ICLN认为需要院感防控专业知识和技能的培训。结论:浙江省ICLN岗位职能不够明确,需要建立系统的培养和认证体系,优化岗位标准,推进岗位的专科化发展。
