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To determine district cooling system design load and optimize their chillers' operation strategy, the variation law and prediction of hourly cooling load in a DCS were studied.

摘 要：为了正确选择区域供冷系统设计负荷并优化其主机运行策略，对某区域供冷系统的逐时实际冷负荷变化规律及数值预测进行研究。

The Predictor Corrector Primary Dual Interior Point Method is used to solve the OPF model. The effectiveness of load shedding is confirmed using the Q-V mode analysis method, which can be applied to compute eigenvalues of a reduced Jacobian matrix. The numerical results of 2 IEEE standard test systems demonstrate that the proposed OPF model is very effective since it automatically identifies the weak buses and circuits and calculates minimum load shedding.

论文采用了预测-校正原对偶内点法求解该模型，并通过Q-V模态分析研究切负荷前后系统降阶雅可比矩阵的特征值变化情况，评估切负荷控制措施的有效性。2个IEEE标准试验系统的仿真结果表明，该模型直接针对系统薄弱环节，自动辩识切负荷节点和最小切负荷量，具有很好的效果。

This "Preload" is not to be confused with applied load on the system, but should be understood as internally built-in load.

不要和丝杠的常规载荷混淆，但是可以把它看作是一种内置的载荷。

The factors influencing on press fit load in assembly were analyzed by the FEM numerical simulation,and the press fit load ,static torque and fatigue torsional strength were experimentally verified.

本文阐述了装配式凸轮轴的技术优势，介绍了装配式凸轮轴的滚花连接机理，采用数值模拟的方法对影响滚花连接压装力的各种因素进行了分析，并完成滚花连接压装实验、静扭强度和疲劳强度试验。

Constant primary winding current independent of load level is inherent in the proposed system so that power could be transmitted from power source to load in a stable manner.

额定频率下系统一次侧线圈电流保持恒定而与负载大小无关，保证电能由电源向负载的稳定传输。

The developed program also has some post-processing functions including structure shape map, discrete structure mesh map, structure displacement map, cracking map, stress map of steel bar, principal stress map of any section, searching displacement of any load step, load-deflection curve map of any node and so on.

包括结构形式图、结构剖分网格图、结构变形图、裂缝开展图、钢筋应力图、任意横截面的主应力图、加载过程中的任意荷载下的位移查询、任意结点的荷载—挠度曲线图等。

And based on this, the indexes of load probability characteristics are constructed to measure the load probability.

这需要我们补充新的负荷特性描述、分析方法，进行负荷概率特性的分析。

Third, based on the example of over proof on-load loss in 180MVA/220kV power transformer, the eddy loss in winding is analyzed with the leakage flux element software. Some conclusions with practical use are given. In order to reduce the load loss, primarily we should reduce radial leakage flux of transformer possibily.

运用漏磁场分析软件，以180MVA/220kV电力变压器负载损耗超标为例，进行详细分析，提出有工程实用价值的结论：降低变压器负载损耗，从根本上应尽可能减少变压器辐向漏磁。

This thesis DESign steel wire tension control system of Steel Billet Grinding Machine, and establish mathematical model of every component in electro-hydraulic proportional valve control dissymmetry hydraulic cylinder servosystem and the load with large inertia and flexibility system of Grinding Machine. Through the medium of matlab/simulink simulation, this thesis mostly analyses Pre-load impact of steel wire stress. Compare with the emulation result of non-feedback, force feedback, displacement feedback, thereby educe reliable conclusion.

本文设计了钢坯修磨机钢丝绳张力控制系统，并且对电液比例阀控非对称液压缸伺服系统的所有液压元件和修磨机柔性负载系统进行了建模，通过MATLAB／SIMULINK仿真，主要分析了预紧力对钢丝绳受力的影响，而且对开环无反馈、力环反馈、位移反馈的仿真结果进行了比较、得出了可靠的结论。

The detailed steady state process of OCC APF with both resistive load and nonlinear load is analyzed,based on which the physical meaning and steady condition of proportional part and integral part in PI controller are given.

在此基础上给出了 PI调节器中P和I环节的物理意义及其应满足的条件，发现可将其作用分开：I环节主导Um长期内较大的变动，用来反映负载大小的改变；P环节每个工频周期内对Um小范围调整，用来平衡每个工频周期内负载存在的谐波。

The role of the environment is very important.

的作用，环境是非常重要的。

At that time, the High Court of England and Wales Court of Queen's Bench president of William Murray, Lord Mansfield in June 22, 1772 ruling:"No matter then there is the inconvenience, but there must be a decision, I can not say that this case under the law in England are permitted or authorized; are so black should be released."

当时的英格兰及威尔士高等法院王座法庭院长William Murray， Lord Mansfield于1772年6月22日宣判：「无论有那麽不便，但总要有个决定，我不能说这件案在英格兰法律之下是准许或认可；所以黑人是应该被释放。