无系统的

Autonomous systems of the Internet form a huge complex network connected by physical links,in which the autonomous systems and links among them can be regarded as vertices and edges of an undirected graph.

因特网的自治系统(AutonomousSystem简称AS)构成了一个由物理链路连接起来的庞大的复杂网络，其中的自治系统及其之间的连接可以看作是无向图中的顶点和边。

An optimal control model is developed for the definite linear economic systems with an inequality constraint on state integrals, based on the dynamic input-output theory.

利用动态投入产出模型和控制理论方法相结合，对经济系统进行分析和宏观调控·具有状态积分不等式约束的确定性线性经济系统最优控制模型，是基于动态投入产出理论建立的·利用无约束条件的极大值原理，分析了最优技术与经济控制策略的存在性和惟一性，使得产品的实际产出尽量接近理想产出，同时使能源、资金等消耗最小，并给出了最优反馈控制的形式

Using this scheme, we successfully produced a triple recessive line for genes ch, nlw (non-lepis wing) and b-t on the 13th linkage group and a double recessive line for genes nb and ki-2 (kidney-shaped egg 2) on the 19th linkage group of Bombyx mori.

采用所设计的方案，成功培育了家蚕第13连锁群的赤蚁、无鳞毛翅和褐色卵t (b-t，母性影响遗传)的三隐性系统，并培育了第19连锁群的狭胸和第二肾形卵(ki-2，母性影响遗传，待定位突变基因)的双隐性系统。

Secondly, the power system fault diagnosis analytic model which use both protect andswitch action information is proposed in this paper, it can be described as 0-1 integerprogramming with nonrestraint, reshut break is introused in the analytic model and introducethe contribution factor to the protect, this model solve the fault diagnosis problem in which theprotect information is lack in a certain extent, and present the experienced formular which isused to decide all kinds of protect contribution factor.

然后，提出同时利用保护和断路器动作信息的电力系统故障诊断的解析模型，其可以描述为一个无约束 0-1 整数规划问题，将重合闸引入故障诊断的解析模型并且对保护引入贡献因子，给出确定各种保护贡献因子的经验公式。这种模型在一定程度上解决了数据信息不完整时的电力系统故障诊断问题。

In view of the key problem of subminiature underwater robots, structural improving,control algorithm and underwater experiment is studied. They can be described as follow: Firstly, the subminiature underwater robot should be compact in size and low cost, for which, it is difficult for us to control its balance. So that, a new kind of piston--style ups and downs system was invented, which can keep the underwater robot horizontally suspended in the water without driving force.

中文摘要本文针对超小型水下机器人在运动中存在的问题，设计了一种新的超小型水下机器人的沉浮结构形式，着重研究了其运动学动力学性能、探讨了相应控制算法、进行了水下试验，具体研究内容如下：首先，超小型水下机器人由于体积小重量轻，在水中沉浮时悬停平衡控制困难，为此进行了一种新的活塞式沉浮系统设计，该系统使水下机器人能够在无动力驱动的情况下，使其呈水平状态稳定悬浮在水中。

So, city should be regarded as a life system,similar to other ones. At the same time,city isdesigned for human beings. And the most important choice of biological construction in 21 century is toconstruct some crowded, mixed functional buildings and avoid planless land use as much as possible.

因此，城市应被看作是一个生命系统，类似于其它生命系统，诸如生物体一样共同遵循生态法则，同时城市应回到为人而设计的初衷。21世纪的人类生态建设最重要的选择就是根据&就近原理&建设一些密集的多功能的复合型建筑，尽可能地避免无计划地使用土地。

The mian works are as follows:(1)By coprecipitation technique and coprecipitation- gel technique the nano zirconia powder was produced, factors affecting the properties of nano zirconia powder such as pH and the content of stabilizator are analyzed;(2)By the new pressless sintering process, the nano zirconia ceramic was produced, factors which can affecting the properties of nano zirconia sinter body such as moulding press and the sinter temperature are analyzed;(3)By the microtherm pressless sintering process, the nano copper added functional zirconia ceramic composite was produced, microscopic dimensionality and electric properties of such sinter body and the factors affecting such sinter body are analyzed;(4)By the self-invented "external albumen coating" technique the zirconia powder was successfully coated by carbon in the corresponding sinter body, which can help solve the traditional aggregation problem to some degree;(5)Based on analyze the characteristics in the nano powder sinter process, the "three-ball sinter model" was proposed, for the relationship between the relative density and porosity of sinter body, by mathematical fitting, such model was successfully verified.

本研究比较系统地研究了纳米氧化锆陶瓷的合成与成型机理，特别是讨论了纳米氧化锆陶瓷的稳定性，为防止纳米颗粒在外场作用下的团聚和长大提供了理论基础和实验数据，具体工作有以下几方面：(1)采用共沉淀法和共沉淀-凝胶法制备了纳米氧化锆粉体，并分析了pH值和稳定剂含量对粉体性能的影响；(2)采用新型无压烧结工艺制备了纳米氧化锆陶瓷，并分析了成型压力和烧结温度对烧结体性能的影响；(3)采用低温无压烧结工艺制备出添加纳米铜的功能性纳米氧化锆复合陶瓷，并分析了烧结体的微观尺度和电学性能的变化以及影响因素；(4)通过自创的&鸡蛋清外敷法&在真空镀膜台上对纳米氧化锆粉体进行包敷碳颗粒的表面处理，并采用真空烧结工艺制得相应烧结体，初步开始解决陶瓷烧结过程中团聚长大这一传统难题；(5)通过分析纳米颗粒在制备烧结体过程中的实际特点，提出了&三球烧结数学模型&，通过引入坯体相对密度和孔隙率的相对关系分析并通过自行编写的数学拟合软件，验证了这一数学模型。

And the traditional passive filter's function is also limited for avoiding the resonance and harmonic enlarging. The auto-compensator and harmonics shielding converter transformer can be used to solve these problems, which is based on the principle of the winding ampere and turn's balance. This paper elaborates this kind of transformer filter mechanism. In the view of the HVDC system, a new winding connection plan is proposed, and the filter optimization model is created.

作者基于自耦补偿与谐波屏蔽的换流变压器，针对某实际的HVDC模拟系统，提出了与该变压器配套的滤波装置的接线方案，并将外罚函数法和遗传算法相结合，对上述滤波装置进行优化设计，建立了以初期投资最小为优化目标、满足系统无功需求的滤波器优化配置的数学模型。

The V-type metering system which can infinitely adjust the ratio is developed based on the analysis and compari-sion of the various types of polyurethane metering systems and the performance characteristics of self-developed reaction injection molding machine .

在对各种类型的聚氨酯计量系统进行分析比较的基础上，结合自行研制的反应注射成型机的工作特性研制出可进行无级比例调节的楔形计量系统。

Fisrt of all , It introduces the matheds and steps of using MATLAB to solve algebra Riccati equation ; Secondly , It is the design of autopilot schemes of three channels ; And in the end , the most important is the simulation of control system making use of software Simulink of MATLAB , and according to the curves , this thesis compares the two working estates and judge the stabliziation of control system .

文章首先介绍了利用MATLAB软件求解代数Riccati方程的方法及步骤；然后分别设计了三个通道的自动驾驶仪；最后，利用MATLAB的Simulink对所设计的控制系统进行仿真，并根据所得到的曲线，对比有无自动驾驶仪两种工作状态下的系统稳定情况。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。