查询词典 hydropower

By use of first-order linear expansion of Taylor series, the linearization process of both nonlinear constraints and objective function of long-term optimal scheduling model are performed and an optimal scheduling model based on seccessive linear programming is built; an approach to solve Optimal scheduling of cascade hydropower station problem by seccessive linear programming is put forward, the scale-down factor of iteration step length is used to ensure that the algorithm can converge to the optimal solution of optimization problem quickly and accurately.

通过采用泰勒级数一阶描述形式，对优化调度目标函数和约束条件中的非线性约束进行线性化处理，建立了基于连续线性规划算法的优化调度数学模型，提出了用连续线性规划技术求解梯级水电站优化调度问题的算法，并采用迭代步长的动态比例缩减因子保证算法能快速准确地收敛到优化问题的最优解。

The guide bearing lubrication performance of hydropower sets is directly relative to the problems of shafting abrasion and vibration.

水轮机导轴承的润滑性能直接关系着整个机组轴系的磨损与振动问题。

The series shaker in the construction of hydropower, coal, highways and other areas to be widely recognized.

该系列振动筛已在水电建设、煤炭、高速公路等领域得到广泛认可。

Through the slope safely monitoring in Jin anqiao Hydropower Station,it is shown that the influence upon the stability of slope of B20 collapse accumulation from the excavation shear pin of the lower retaining wall and the rainfall in flood period is very sensitive,and the deformation characteristics and instability mechanism of slope of the accumulation are analyzed.

金安桥水电站边坡安全监测表明：左岸B20崩塌堆积体边坡的稳定性受下部挡墙基坑开挖切脚及汛期降雨影响十分敏感，分析了堆积体边坡的变形特征和失稳机理。

The results showed:①Iron bacteria in this hydropower station were identified as sheathed bacteria.

该水库中的铁细菌主要为鞘细菌。

By combinatory counting process to enumerate data of work condition of each generators, thus makes sure the searching and solver in optimal condition.3. Set up the power equilibrium equation and flow equilibrium equation according to the slack variable. It is not necessary to adjust the optimization any more and guarantee the optimal precision of the solution.4. Digitalize the composite characteristic curve, such as the digital input and accurate extraction of data during the performing.The above mentioned is an expanding for optimal performing of hydropower station in theory. It has good engineering applicability.

在水轮机专业领域和水电站运行领域主要成果是：(1)用人工智能的方法解决了水电站机组间负荷动态最优调度问题，且用数学方法严格证明了解的最优性；(2)用组合计数对并联机组的每个组合工况进行无遗漏枚举，从而保证搜索策略的作用范围和解的最优性；(3)利用松弛变量建立了功率平衡方程和流量平衡方程，使优化结果不再需要二次调节，保证了解的优化精度；(4)综合特性曲线的数字化，包括曲线的数字化输入和在程序运行过程中对曲线信息的精确提取。

According to the characteristic of Xiangjiaba Underground Hydropower Station at the right bank of Jinsha River, one alternative option that the tailrace tunnel with sloping ceiling is adopted has been studied comprehensively, by method of model test and numerical calculation.

本文针对向家坝右岸地下电站的特点，采用模型试验和数值模拟方法对变顶高尾水洞方案进行了较为系统的研究，为工程设计和施工组织提供了参考依据。

Thereby we can save a great deal of engineering quantity and improve the rate of building progress. But, there is the mixed free-surface-pressure flow in the tail tunnels with sloping ceiling and big pressure in the hydraulic transient process. It is bad to hydropower stations of its safe and steady function.

但是，变顶高尾水洞内存在较为复杂的流态明满交替流，使水电站过渡过程中可能产生较大的压力脉动，对水电站的安全稳定运行存在一定影响。

To all project practicality, the introduction is given to the operational characteristics, the methods for calculation and the researching actuality of the tail tunnels with sloping ceiling underground hydropower stations the Three Gorges. This paper has discussed in detail the characteristic method being the same with the compressive flow and the Priessmann solution being the same with the free-surface-pressure flow. And how to deal with boundary conditions has been expatiated. Also hydraulic transient process of tremendous load fluctuation in the tail tunnels with sloping ceiling has been numerical simulated and the Fortran program for numerical simulation has been given. The paper gain the maximal press for tail end of the shell, the maximal rising rate of rotational speed of generating set, the maximal vacuum degree for inlet of the tail tunnels and so on under 11 kinds conditions of tremendous load fluctuation. These conditions include the design conditions, the check conditions and the superposition conditions. Finally, the computing results have been analyzed and summarized. The end chapter is the general comment of the whole-length content and the describing of the intending view of researching.

本文以三峡右岸地下电站尾水洞设计为背景，从工程实际出发，阐述了变顶高尾水洞的工作特性、使用范围及其研究现状；详细论述了适用有压流的特征线法、适用明满交替流的普里斯曼解法等数学模型；边界条件的给定和明满交替流的计算方法；用Fonran语言编制了数值计算程序，对三峡右岸地下电站变顶高尾水洞的大波动工况进行了数值模拟，分别得出了在设计工况、校核工况和叠加工况下蜗壳末端最大压力上升值、机组最大转速上升值和尾水管进口最大真空度等重要参数；对数值计算结果进行了详细分析并得出了有价值的结论；最后展望了今后水电站变顶高尾水洞的研究方向。

To guarantee the rapid and healthy development of the hydropower enterprise, it is necessary to sol...

为保证水电事业的顺利发展，必须从政策上寻求解决问题的出路。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。