查询词典 secure operating system

Polytope is introduced to describe different operating conditions as a convex set whose vertices are some selected typical operating parameters.

采用多胞型模型将系统运行状态的各种变化描述为以若干个典型运行参数为顶点的凸集。

But in practical operating, overvoltage caused by reignition of the vacuum switching device frequently appears, and it result in damage of the capacitor bank or the switchgear itself. Ensuring the switchgear against reignition and installing a protective device are two main approaches to avoid the phenomenon. In this paper, a study on overvoltage caused by reignition due to capacitor bank switching with the vacuum switching device and its preventive measures are carried out. The main work which has been done and researches are as follows: 1. The producing mechanism of overvoltage and its influence factor are analyzed. It is pointed out that single-phase reignition is the main reason for damage of the switchgear and two-phase reignition is the main reason for damage of the capacitor bank,so overvoltage of single-phase reignition and two-phase reignition are the emphases of prevention. 2. Analysis of the special working condition of the operating switch for capacitor bank is carried out. It indicates that the vacuum switching device is difficult to realize no-reignition under this operation condition, so it is more practical to adopt protection devices. 3. Analyses of protection effect of RC and MOA and their shortages are carried out. It shows that the two methods can only restrain effectively overvoltage caused by single-phase reignition, and they cannot protect the capacitor bank when reignition of two-phase occurs. 4. The operation principle of G-R damping device is analyzed and discussed emphatically.

本文针对真空开关投切电容器组时因重燃而产生的过电压及其防治措施进行了研究，所开展的主要工作和研究结果如下： 1、对过电压的产生机理及其影响因素进行了分析，指出单相重燃是导致开关设备损坏的主要原因，而两相重燃则是导致电容器组损坏的主要原因，因此单相重燃和两相重燃过电压是防护的重点； 2、对电容器组操作开关的特殊运行条件进行了分析，指出在这种运行条件真空开关难于实现不重燃，因此采用保护装置更具有现实意义； 3、对RC与MOA的保护效果和存在的不足进行了分析，指出这两种方法均只能有效抑制单相重燃过电压，而不能在发生两相重燃时保护电容器组； 4、重点对G-R阻尼装置的工作原理进行了分析和讨论，指出该装置接入后线路中将会出现两种频率的高频振荡，而电容器组上的过电压是由这两种振荡共同决定的； 5、根据对上述两种振荡的分析指出存在一个最佳电阻值使得过电压最低，并提出了电容器组电压和最佳电阻值的近似求解方法； 6、使用电气暂态分析软件MATLAB对G-R装置的保护效果进行了仿真计算，证实该装置确实可以有效抑制重燃时的电容器组过电压； 7、根据仿真与近似计算结果的偏差提出了近似计算的修正方法，经过修正后的过电压计算结果与仿真结果吻合较好； 8、对G-R装置中放电装置G与阻尼电阻R的要求进行了分析，指出采用编织电阻和真空间隙可能是最佳选择。

The aim of my dissertation is to provide theoretic lever and thinking paradigm for thedeeply reading of 〓 century traditional socialism model and the scientificallyreconstructing of 〓 century new socialism model,especially the policy for benignlyadvancing of reform and opening-up and modernization construction of socialism withChina's characteristics,through the research in the theory and practice of mediumdimension called operating mechanism with real socialist country being research target,society's operating mechanism being new angle,value idea of society's benigndevelopment being target,and the combination of norm's and empirical research and theconjuncture of history and comparison being methodology is about the research'saim and significance,methodology and thinking way degree which academic circle hasachieved in studying the issue.

基于此，本文以现实社会主义国家为研究对象，以社会运行机制为新视角和切入点，以社会良性发展的价值理念为目标参照，以规范研究与实证研究相结合、历史的方法与比较的方法相结合为研究方法，旨在通过社会主义社会运行机制这一中观层面理论与实践的研究，为深入解读20世纪传统模式社会主义和科学建构21世纪新型模式社会主义提供理论支点和思维范式，特别是为中国特色社会主义改革开放和现代化建设良性推进提供思想依据和理论借鉴。

The research can provide theoretical reference to ascertain work intensities of Erector spinae for forestry worker under different forestry work conditions,which has important theoretical value to quantificationally study loads and labor intensities of the lumbar muscles for the forestry workers under different forestry work conditions,to prevent and decrease the lumbar traumas,to provide laboring safety and protection,to diagnose and correct unreasonable operating postures,to train the labor skills,to design and improve forest operating tools,to prevent and treat the occupational diseases.

本研究为确定不同林业操作中劳动工人腰背部肌肉工作强度提供理论参考，为定量研究在不同林业作业中操作工人的腰背部肌肉及脊柱所承担的工作负荷以及劳动强度理论依据，并对于预防和降低林业作业工人腰部损伤、提供劳动安全与保护、诊断和矫正不良作业姿势、进行劳动技能培训、指导设计与改进林业生产工具、职业病的预防与治疗等具有重要的理论价值。

Under different forestry work conditions,the EMG amplitudes of Erector spinae were not at the same level in the process of forestry operating,although the average intensity of Erector spinae was probably identical under different forestry work conditions,the EMG amplitudes of Erector spinae distribute in different ranges of MVE%,and the duration spent in the certain ranges of MVE%is not same in the process of entire operating.

在不同作业工况下背部竖脊肌在整个操作过程中工作强度不尽相同，虽然在不同的作业工况下背部竖脊肌平均工作强度可能相近，但是在整个操作过程中，肌肉的用力程度是处于不同MVE%范围内的，且在整个操作过程中肌肉在不同的MVE%范围内所持续时间不同。

We had designed and produced the por-table ophthalmic operating microscope whichis compact in constraction, light in weight(19kg only) and convenient in carrying, excel-lent in optical quality, strong in stereognosis,wide in visual fie1d, low in price, and rotable in360 round, hence this kind of operating micro-scope is benefit in popularization ofophthalmic microsurgery and increase of therate of success of ocular operation in basic-level hospitals.

立体感；成功率；光学质量；眼科；人工晶体；青光眼手术；轻便式；手术显微镜；显微手术；放射状切开；我们设计并生产了轻便式眼科手术显微镜，这种显微镜体积小，重量轻(仅19kg)，一人即可携带，而且光学质量高，立体感强，视场大，可做360°范围旋转，价格低廉。这样可以尽快使显微手术在国内普及提高手术成功率，使数以万计的眼病患者都能在当地得到良好的治疗。

Methods 3 classes of different grades to be divided into two groups randomly, namely the control group and experiment group. The preoperative preparation (such as the scrubbing, wearing operating coat, degerming, and so on), basic operation and operating synergia were tested, after the CTG and the EPG were taught by the traditional and simulated vascellum means, respectively. And then, compared the variability of the scores.

在外科三基训练中，分别将科技学院3个不同年级的临床医学专业3个班的学生随机分成对照组(control group， CTG)和实验组(experim ental group， EPG)，CTG采用传统教学方法，EPG采用简易模拟血管方法进行教学，三基考核术前准备（刷手、穿手术衣、消毒等）、基本操作和术中配合，比较两组各指标的差异。

To analyze the experimental results, the four operating conditions that influence mean particle size and size distribution, filtration time and the rate of hydrolysis of titanyl sulfate solutions are evaluated, four fitting models between responses and its influence factors are obtained. Optimum operating conditions are predicted. An experiment for validation of predicted conditions was carried out, and confirms the estimations are correct.

利用响应面试验设计软件来辅助设计，根据实际的输入与响应的结果，研究了搅拌速率、加料速率、加热速率和底水量对水解产物的粒度及粒度分布、过滤时间和硫酸氧钛的水解率的影响，推导了四个因素对四个响应的数学模型，分析其试验误差，最后得到优化试验的预测结果，用于指导实际的生产过程。

It is advisable that live-loaded bonnets be checked for bolt torque at operating pressure, no future tightening of gasket bolting will be necessary, unless the valve has been dismantled, in which case, the gasket bolts must be torqued to appropriate values and bolt tightness rechecked after operating test pressure and temperature has been achieved.

可以在工作压力下检查动负载阀帽的螺栓扭矩，除非阀门被拆卸，否则不需要对垫圈螺栓进行紧固。在这种情况下，垫圈螺栓扭矩必须保持适当，在达到工作试验压力和温度后，应该重新检查螺栓的紧固性。

Along with the password attack method unceasing renewal, the computation ability unceasing enhancement as well as to the operating speed request, the tradition disperses row algorithm MD5, SHA has demonstrated their shortcoming and the insufficiency day by day, and thestructure of hash function is mostly based on block cipher algorithm DES, but the HASH function security is established above the grouping function security, because the DES operand is very big, the operating speed very slowly by and its itself some characteristics, therefore disperses a row function based on the DES algorithm to have potential unsecurity.

随着密码攻击手段的不断更新、计算能力的不断提高以及对运算速度的要求，传统的散列算法MD5，SHA已日益显示出它们的缺点和不足，并且过去hash函数的构造多是基于分组密码算法DES的，而hash函数的安全性是建立在分组函数的安全性之上的，由于DES运算量很大、运算速度很慢以及其本身的一些特性，因此基于DES算法的散列函数具有潜在的不安全性。

I was just taking her hand, to help her out of a car, and I knew it.

我只是握着她的手，扶她下车，但我知道这一切。

China and South Korea have excoriated Japan over its approval of new school books which they say whitewash the atrocities committed during Japanese occupation, and anti-Japanese protests have been held in Chinese cities. The lingering bitterness over Japan's past imperialism still threatens to mar relations between the big East Asian powers

中国和韩国强烈谴责日本通过新的中学历史教科书，他们认为这一教科书掩盖了日本在其占领期间所犯下的残酷暴行，反日抗议活动在中国数座城市发生，历史上日本帝国主义制造的痛楚无法被忘却，这有可能破坏东亚强国间的关系。