查询词典 three-wire system

We gain conditions for persistence for three-species of the system and global asymptotic stability for positive periodic solution of the system.

研究了一类具有扩散系数和 Holling 类功能反应的一捕两食三种群非自治捕食系统，得到了系统持久生存和周期系统存在唯一全局渐近稳定的周期解的条件。

This paper consists of three parts: Firstly, we discuss a nonautonomous -species two-patches cooperative Lotka-Volterra diffusion system. Using Brouwer fixed-point theory and Liapunov function, under some conditions, we obtain that the system has a unique globally asymptotically stable positive periodic solution. Secondly, we consider a kind of nonautonomous predator-prey model, in which preys are with stage structure and the predator are with two patches.

中文摘要：本文分三部分讨论三类生态模型周期解或概周期解的存在性及全局渐近稳定性等内容：第一部分讨论了两斑块种群的互惠Lotka-Volterra扩散系统，运用不动点理论和构造Liapunov函数，得到了系统存在唯一一个全局渐近稳定的正周期解的充分条件。

This paper stands in the railroad surmounts the type development and the railroad reforms the experiment site the angle, auxiliary industry changed the system the overall plan to the Chengdu Railroad Bureau host auxiliary separation to conduct the research, has profited from some foreign enterprises industry success reforms experiences, from the railroad bureau host auxiliary industry overall situation, the host auxiliary separation overall mentality and the target programming,"three kind of properties" the overall situation and mixed the principle, the auxiliary industry separation changes the system the bare bone, the experiment site enterprise implements the plan, straightens out the property right to relate several aspects to make the multianalysis elaboration.

对成都铁路局辅业改制分流工作提出了一些看法和实施意见。本文采用了实证研究与案例分析、定性分析与定量分析并重的研究方法，做到了系统与局部相结合、理论与实践相结合、经验与分析相结合，把实证的、规范的、对策的研究结合起来，体现了理论与实践相结合的原则。各种研究经验和取得成效对成都铁路局运输主业和辅业的发展具有很大的指导意义。

A theoretical model is built to investigate the simulation of the infrared characteristic of the metal structure with the PCM false target.Structure parameters of the PCM false target that suit for the simulation are investigated numerically.According to the results,further request on the improvement of the thermal conductivity of PCM is presented.An experimental platform is built and the numerical model is validated experimentally.Three key thermal characteristic components of the false tank(barbette,wheel and front armor plate) are manufactured and tested,and good results are obtained.A method for the thermal conductivity enhancing of PCM by using aluminum fins is studied,the influence of the structure parameters of PCM plates to the simulation effects are investigated numerically,and the reasonable configuration parameters of the PCM plates used to simulate the steel plates of different thickness are obtained.In the study of the application of heat convection method in IR false target,a passive infrared simulation system is designed to simulate the infrared characteristic of metal constructions.The system is made up of pipe-plate,pump,receiver,and working fluid.

在相变材料应用于红外示假的研究中，通过数值模拟，研究确定了适用于制作假目标的相变材料各物性参数的范围，分析了相变材料制作假目标的可行性，并根据所得结果，选取石蜡为研究对象，建立了相变材料模拟金属构件红外特征的理论模型，研究了适用于模拟各金属构件红外特征的相变材料假目标的相关结构参数，得出了相变材料假目标模拟各金属构件红外特征的理论结果，并对相变材料的导热系数这一物性提出了进一步的改进要求；搭建了假目标实验平台，验证了所建理论模型的准确性；以坦克假目标为研究对象，制作了炮塔、负重轮和前上装甲板三个坦克假目标的关键红外热特征部件，并进行了野外实验，取得了较好的结果；以添加铝肋片作为改进相变材料导热能力的手段，理论研究了此类导热增强型相变材料的相关结构参数对模拟效果的影响，得出了模拟不同厚度钢板红外特征的导热增强型相变材料的结构参数及模拟效果。

Bully person the mainland " will be in " system of 18 kinds of weapons " in join brand-new weapon " bastinado " and " ungual ", open in the round " system of war of country of the Three Kingdoms .

霸者大陆"将在"18般兵器系统"中加入全新武器"杖"和"爪"，并全面开放"三国国战系统。

As the earth then occupies its three-dimensional phase of experience in our own solar system, and as each of those companions that are about the solar system represents as it were one of the phases of our conscience - the elements of our understanding - or our senses; then they each in their place, in their plane, bear a relationship to us, even as our desires for physical sustenance; that is: foods for the body; with all of the attributes, all of the abilities to take that we feed upon and turn it into elements for our body.

在太阳系中，地球是三维空间的，代表了我们意识范畴内的三个层面---理解的基本元素---或感知。他们中的每个方面均与我们相关，例如我们身体的基本欲望：食物为了生存，喂养我们的身体。

In chapter two and chapter three of this paper, much adjustment method and process of third-order and forth-order triangulation and bench mark of Shandong province are discussed.The construction goal, function design, system performance, system characteristic, and important problem exploitation are discussed in database design segment.

数据库系统设计部分介绍了数据库系统的建设目标、功能设计、系统的性能、特点以及研究开发过程中的重要问题说明等内容，对数据库系统进行了总体评价。

Planaria is the most simple in three blastoderm animal, its nerve system is ladder-like.This is the bio- evolution of the nerve system.

三胚层动物扁形动物涡虫的神经元连接成梯形神经系，有原始的脑和两条神经索，反映了原始生命反射功能的进化和演变。

The color television camera consists of an optical system that, through a system of lenses,mirrors, and filters, separates the three colors and sends each into its own camera tube.

彩色电视摄像机由一个光学系统构成，并通过一组透镜，反射镜及过滤镜来分解三种基光并使它们投射到相应的三个摄像管上。

A simpler scheme of interference canceler is proposed based on beam space analyzing. It is shown by the numerical results that such scheme can overcome the shortcoming of smart antennas. The time to demodulate desired user is reduced. It also reduce the complexity to realize such an AA/IC system with hardware. In the chapter 5, a multi-beam antenna system with three and six fixed beams are analyzed.

第四章综合考虑了智能天线的空间滤波和级联干扰删除器的作用，提出利用智能天线的空间滤波特性进一步简化干扰删除器的设计方案，数值分析结果表明该方案不但可以克服天线空间滤波的不足，同时缩短了用户信息解调的时间，降低了硬件实现的复杂度。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新