The stability of a positive equilibrium point of the following predator-prey model are investigated dx(t)dt=rx(t-τ)-Dx(t)-αx-2(t)y(t)x-2(t)+β-2 dy(t)dt=kαx-2(t)y(t)x-2(t)-β- 2-ey(t)-cy-2(t) The necessary and sufficient conditions of unconditional stability are given f or this system and stability switches are discussed.
研究食饵与捕食者两种群生态系统dx( t)dt =rx( t-τ) -Dx( t) -αx2 ( t) y( t)x2 ( t) +β2dy( t)dt =kαx2 ( t) y( t)x2 ( t) +β2 -ey( t) -cy2 ( t)的稳定性 ,给出了该系统正平衡态无条件稳定的充要条件并讨论了其开关现
?Stability of a positive equilibrium point of the following predator-prey model are investigatedNecessary and sufficient conditions of unconditiond stability are given for this system and stability switches are discussed.
研究食饵与捕食者两种群生态系统的稳定性，给出了该系统正平衡态无条件稳定的充要条件，并讨论了其开关现象。
Necessary and sufficient conditions of unconditional stability are given and stability switches are discussed.
研究了食饵与捕食者两种群生态系统的稳定性，给出了该系统在正平衡点处无条件稳定的充要条件，并讨论了其开关现
The selection of switch with load of different electorlyzer and its parameters were introudced.
简要介绍了不同电解槽有载开关及有关参数的选择。
This paper summarizes the basic principls of the automatic resonance adjustment of the arc-suppression coil with an on-load tap-changer.
概述了用有载开关实现消弧电抗器自动调谐的基本原理，根据熄弧条件考虑了允许的脱谐度和消弧电抗器应具有的分接头个数，阐述了用微机进行自动调谐的方法，最后给出了现场试验结果。
Design of the detecting parameters of on-load tap-changers in transformer based on USB interface
基于USB接口的变压器有载开关测试仪设计
we designed the testing instrument for on-load tap-changers in the transformer based on AD7656.
针对传统有载开关测试存在的测量速度慢、同期性不佳问题,采用AD7656设计了变压器有载开关测试仪。
The influence of tilted phase on the focal switch is also studied.
着重研究相位倾斜对焦开关现象的影响。
Focal Switch Phenomenon of H-C-G Beams Passing Through a System with the Aperture and Astigmatic Lens Separated;
H-C-G光束通过光阑-像散透镜的焦开关现象
The Study on Chaotic Phenomena of Soft-switching DC/DC Converters;
软开关DC/DC变换器混沌现象的研究
Research of Chaos in DC-DC Converters;
DC-DC开关变换器混沌现象的研究
comformational switch
构象转换（器），构象开关
Analysis and Treatment of Circuit Breaker and Line Fault in Same Phase before Energizing Process of a 10 kV Line
10kV出线开关及线路同相故障现象分析及处理
Study of Non-linearity of Laser Triggered GaAs Photoconductive Switch
激光触发GaAs光电导开关非线性现象的实验研究
Simulation of Coexisting Attractors of Inner Period-window in Switching Converter
开关变换器周期窗内吸引子共存现象仿真研究
Of, relating to, or constituting phenomena or a phenomenon.
现象的现象的，关于现象的，或组成现象或一种现象的
The scientific study of periodic biological phenomena, such as flowering, breeding, and migration, in relation to climatic conditions.
物候学，物候现象研究与气候条件有关的周期性生物现象的科学，如开花、繁殖和迁移
There is a general debate on the campus today over the phenomenon of college students' doing a part-time job.
关于大学生打工这一现象，校园里正展开一场讨论。
Basic Study of Vacuum Arc and Design and Development of the Structures of Vacuum Switch Contact
真空电弧基础现象研究与真空开关触头结构的设计和发展
It can save water by 50 percent, that it is, save water radically by avoid forgetting to close the switch after using it.
从根本上避免了只开不关，产生长流水，浪费水资源的现象。
The Nonlinear Phenomena and Control in Phase-Shifting Full-Bridge Zero-Voltage Switched Converter;
移相全桥零电压开关变换器中的非线性现象及其控制
Experimental Study on Deformation Phenomenon of Electrical Contacts and the Estimation of Their Electrical Life of Switching Apparatus;
开关电器的电触点形变现象的实验研究及其电寿命的评估
The Pulse Trapping in Birefringent Photonic Crystal Fibers and Its Application in All Optical Switching;
双折射光子晶体光纤中脉冲俘获现象及其在全光开关中的应用
Study on Phenomenon of Series MIM Structure in Nanoscale Based on Ultra-Fast PCSS;
基于超高速光导开关的纳米级MIM结构串联现象的研究
Analysis on Correlative Factors for Occurrence of Hypotension during Infarct-related Arteries Revascularized Instantly by PCI for Acute Myocardial Infarction;
急性心肌梗死直接PCI术冠脉开通即刻低血压现象的相关因素分析