时计

Unlike the conventional indirect method, it can directly implement the generator field and armature current limits accurately, thereby assuring power flow convergence and voltage collapse point identification during tracing the PV curve when generator limits constraints are considered. The critical limit constraint equation is introduced in the corrective stage of the continuation method as the additional equation to solve the limit induced bifurcation point accurately.

给出新的发电机电流极限约束的直接处理算法，解决了计及发电机电流约束时，潮流难于收敛和不易精确求出电压崩溃点的问题；对不易精确求得的极限诱导分岔点，通过在连续潮流法的校正步骤中将关键的极限约束方程作为附加方程来快速而精确地求解。

Then the model of implicit trapezoid time-dominate simulation method with UPFC is established, and also give two scheme of the UPFC controller, the two scheme is compared during the simulation calculation, and draw the conclusion that UPFC both has advantage and disadvantage in improving power system transient stability.

在潮流计算的基础上，进一步建立了计及UPFC暂态稳定分析的隐式梯形时域仿真法模型，并给出了UPFC控制器的两种方案，在仿真计算中对两种方案的控制器进行了比较，得出UPFC在改善系统暂态稳定性上是一把双刃剑。

This paper addresses the most commonly used function of trapezoid allocation and presentsthe general calculation formula about reliabil...

本文采用最常用的梯形分布隶属函数，给出了将应力及强度分别考虑为模糊变量时可靠度的一般计算式。

In this paper, the maximum likelihood algorithm with process and measurement noise for nonlinear continuous-discrete system given by Jategaonkar and Plaetschke is improved in two aspects: 1 to avoid the disadvantages of sensitivities computation by common finite-difference method, in which the perturbation sizes should be selected optionally, an improved finite-difference method with best perturbations, is presented. 2 to improve the numerical stability of Jategaonkar's algorithm, maximum likelihood algorithm with fast triangular square-root decomposition filter is given.

摘要对Jategaonkar等人给出的同时计及过程及观测噪声的非线性连续-离散系统的极大似然算法从两个方面进行了改进：1给出了计算灵敏度的最佳摄动有限差分算法，避免了普通有限差分法计算灵敏度矩阵时需人为选择参数摄动量大小而带来的缺点；2给出了具有快速三角化平方根滤波的极大似然算法，提高了原算法的数值稳定性。

In the short run, the market's a voting machine and sometimes people vote very unintelligently.

投票机器，而且有时人们投票时非常不明智，但是长期而言，市场是一台体重计，用来测量企业的重量有多少，以及长期影响企业价值的是什么。

"But if the economy does well over a long period, markets will do well over a long period," he said. In the short run, the market's a voting machine and sometimes people vote very unintelligently. In the long run, it's a weighing machine and the weight of business and how it does is what affects values over time.

假如经济长期表现得很好，市场也会有一样的表现，短期而言，市场是一台投票机器，而且有时人们投票时非常不明智，但是长期而言，市场是一台体重计，用来测量企业的重量有多少，以及长期影响企业价值的是什么。

The plan for processing the uranium oxide had been approved by their supervisor; however, it involved mixing many times the batch that the factory liquid processing tank was designed to handle, and when the seventh batch was added, a flash of blue light and a burst of neutron radiation was emitted.

这次铀氧化物的处理计画，是得到主管机关许可的，处理的方法是在经特殊设计的液体处理槽中，加入并混合不同批次的溶液；然而，当第七批溶液被倒入槽中时，临界事故发生了，只见蓝光一闪而过，中子辐射爆冲而出。

However, the water temperature is 20 degrees below, the saturation vapor pressure is negligible.

但是，水温为20摄氏度以下时，饱和蒸汽压力可忽略不计。

The variation of viscosity with temperature was measured by temperature scanning procedures in a coaxial cylinder viscometer.

用旋转粘度计对原油在温度扫描条件下的粘-温关系进行的实验研究表明，原油在低温时呈胶凝状态。

The paper investigates the impact of the shape of amphibious vehicle s on viscous resistance when steering over water.

针对两栖车辆水上行驶时，车体包络线对黏性阻力的影响问题，基于RANS方程结合k-ε湍流模型，利用"刚盖"假定，不计兴波阻力及来流湍流度的影响，进行了某两栖车车体模型静水航行的数值模拟。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。