在...保证下

In this paper. a novel magnetic head crab track pluck detection way is given by the analysis of etched servo graph for 4000 TPI etched surface servo. It improve the maximum seek track speed of magnetic head greatly, So that magnetic head can seek track at high speak for high track density.

光刻伺服盘是一种新的磁头伺服定位技术［1］，通过对4000TPI光刻面伺服系统的光刻伺服图形结构的分析，本文提出了一种简单可靠的磁头过道脉冲检测方式，可显著提高磁头寻道速度，保证磁头在高道密度下高速寻道。

In order to unchange products failure mechanism, the problem of maximum stress is discussed under accelerated life test.

提出了控制产品承受最大应力的措施，以保证在加速试验下产品的失效机理不发生变化。

By means of the qualitative theory and method of delay differential equations, the weak conditions for the bound-edness of the system are obtained. By use of differential mean value theorem and computational techniques on delay differential equations, we show that the system is globally asymptotically stable under condition for the boundedness.

用时滞泛函微分方程的定性理论得到了系统有界的较弱的条件，并运用微分中值定理及有关时滞微分方程的计算技巧，我们获得了在系统有界这样弱的条件下就能保证系统全局渐近稳定的结论。

Our algorithm contains two steps: firstly, a small number of dependence tests are initiated to restrict the feasible search space and reduce calculation complexity; then, in order to ensure accuracy, a MDL metric search in "Delta Form" boosts time performance and efficiency of BN learning.

首先，通过小运算量的独立性测试获取系统结构信息，限制可行解搜索空间，降低了BN学习算法的计算复杂度；然后，采用基于MDL理论的BN学习算法对出现"德尔塔"的局部进行搜索和MDL评分，在充分保证结果精度的前提下，提高了算法的时间性能。

The research focuses on how to accomplish the secure cooperative computation among multiparty without the participation of the third party.

在不需要第三方参与且保证安全的前提下，如何完成多方的协作运算是其研究的核心。

According to the characteristic of mobile nodes,the certificate is modified in this paper.

如何保证在此种情况下节点的安全性是本文所要研究的内容。

Aiming at the dynamic nonhomogeneity and kinematic redundancy, making reference to the actions of human beings, we propose a new hierarchical approach of coordinated path planning for mobile manipulateors, and a dynamic weighting strategy, which can avoid obstacles and get the best results of optimization.

针对移动机械手的动态不均匀性及运动冗余性，参考人类完成任务时的行为，本文提出了一种分级协调路径规划法，以及一种动态加权的优化策略，对移动机械手的路径进行离线规划，在避障的前提下保证了移动机械手性能指标最优。

ABSTRACT The researches of this thesis are carried out around the development of high performance machine tool spindle permanent magnet synchronous motor and its drive system. Five parts are included: First of all, concerning the operating characteristics of the machine tool spindle drive system, the optimum current control strategies of spindle PMSM are determined; The design rules of spindle PMSM's key parameters are summarized, based on the study on the influences of the design parameters on the performances of the PMSM operating at different current control strategies; The practical methods to improve the flux-weakening ability of the PMSM are presented; Based on the analysis and comparison of the operating performances of PMSM with different rotor structures, a novel PMSM rotor structure, which is of excellent mechanical performance, suitable for fluxweakening operation and can improve the torque output capacity in the same time, is presented.

本文围绕高性能机床主轴永磁同步电动机及其传动系统的设计研究展开，所做工作主要包括五部分：首先，确定了主轴永磁同步电动机定子电流的最优控制策略；通过对不同控制策略下主要设计参数对主轴永磁同步电动机性能影响的计算研究，总结了参数设计规律；提出了永磁同步电动机弱磁扩速的实用措施；在分析比较不同转子磁路结构电机的性能，尤其是弱磁扩速能力的基础上，提出了一种机械性能优越，易于弱磁扩速，同时能保证电机恒转矩运行时的转矩输出能力的新型转子磁路结构。

In order to ensure the rapid convergence of the method, incomplete precondition LDLT technology is used.

在预处理技术做保证的条件下，引入Krylov子空间迭代法，计算表明，该迭代方法结合预处理技术后收敛速度非常快，是高效快速求解电磁有限元模拟中形成的大型复系数方程组的最佳选择。

In fact, the waves which influenced stability is very large, the overmeasure cant protect the safe of ship.

在实际情况下，波浪对船舶稳性的影响是很大的，有时候，保留的余度并不能保证船舶的稳性满足安全需要。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。