在...的控制下

As we all know, it is equivalent to the null controllability of a cascade system governedby two linear degenerate parabolic equations. Next, we study the null controllability of acascade system governed by a semilinear degenerate parabolic equation and a semilinear heatequation.

众所周知，这等价于两个线性退化抛物方程构成的耦合系统在单个控制作用下的零能控问题；接下来我们又考虑了一类半线性退化抛物方程与半线性热方程构成的耦合系统的零能控问题。

Under suit upper and lower solution, iteration sequences were constructed, and existence and unique of solutions of linear boundary value problems on second order nonlinear Hammerstein type integro-differential-difference equation were obtained by means of applying the Arzela-Ascoli theorem Lebesque control convergence theorem and disproof method.

在上下解存在的条件下，构造迭代序列，由Arzea-Ascoli定理和Lebesque控制收敛定理得到了二阶非线性Hammerstein型积分微分差分方程的线性边值问题的解的存在性。再利用反证法获得了解的唯一性。

The routing processes are the following: first, according to the traffic demand estimated from historical events, a routing table is constructed by our proposed Genetic Algorithm.

路由管理既为网路讯务管理及控制机制的一环，本研究的目的即在提出一路由选择机制，为即时的讯务需求快速地且能满足资源及QoS的限制下找出最佳的路由传送。

Flyweight, but there are special circumstances where control of this aspect is necessary.

Flyweight的用户是无关紧要的，但是在一些特殊的环境下对这个界面的控制是必要的。

The results show that the optimal amount of foamer is 0.5 wt％and thisporous material has excellent porous structure, that is, interconnected and uniformlydistributed pores with the diameter of pores ranging from about 100μm to 700μm.

结果发现：发泡剂的最佳比例为0.5 wt％，多孔n-HA／PA6材料具有与松质骨相似的多孔结构，孔径为100～700μm，孔的贯通性好，孔隙率可通过调节工艺参数进行控制，最高可达到88.6％；总孔隙率相近的情况下，n-HA含量高的多孔材料的压缩强度较高；孔隙率在58～88％范围内，多孔材料的抗压强度在1.1～15.6MPa，与人松质骨的抗压强度相当。

An optimizing design method of de-synchronous circuit based on an abstract model called control graph is presented in this paper.

基于解同步电路的抽象模型－控制图，提出了一种解同步电路优化设计方法，优化过程由解同步电路的性能评价函数作为指导，在不影响电路性能的前提下有效地减小电路控制通路的面积。

The performance of the controller was tested by computer simulations in MATLAB/Simulink. Results show that the controller can adapt to different level hemiplegic patients, and has better dynamic performance and stronger robustness.

控制系统在MATLAB/Simulink的环境下仿真，结果表明所设计的鲁棒控制器能适应不同程度的偏瘫患者，具有较佳的动态特性和很强的鲁棒性能。

For the feature of large amount of image data, A solution that FPGA extended SDRAM to realize store and buffer image data is presented.

针对图像数据量大的特点，提出利用高端FPGA外部扩展SDRAM的解决方案来实现对高速图像数据流的存储缓冲，在相应的显示时序控制下，完成对高帧频图像的抽帧显示。

BP neural networks have been widely used in mode recognizing, image processing, system control etc A lot of study has been done on the training algorithm of BP neural networks But there are still many short comings To complete the training of the weights of a BP neural network, the key problem is how to overcome the staying at the local minimum points as well as how to increase the training speed based on this condition This paper comes up w...

BP神经网络被广泛应用于分类模式识别、图像处理和系统控制等领域人们对BP网络算法进行了许多的研究，但尚有其不足之处为完成其权的训练，问题的关键在于如何避免陷入局部极小及在此前题下如何提高学习速度为此，就如何选取学习率η和动量矩α提出了改进方案，并应用于数字识别，得到了较为满意的结果

In order to measure the passive network's conduction automatically, a network conduction instrumentation based on FPGA technology was designed and implemented according to the design principle of Virtual Instrument. System adopted FPGA technology building a digital flat-top to imitatively produce the high quality sine signal. Under the control of C8051MCU, measurement, calculation and display of the port network's conduction were automatic implementation. Furthermore, the system has the function of frequency step measurement.

摘 要：为了实现对无源端口网络的导纳进行自动测量，根据虚拟仪器设计思想，设计实现了基于FPGA的网络导纳测量仪，系统以FPGA作为数字平台模拟产生优质的正弦信号，在单片机C8051的控制和处理下，自动实现端口网络导纳值的测量、计算、显示，同时具有频率步进测量功能。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。