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powernode
牛顿－拉夫逊法潮流计算
基本步骤：
（1）形成节点导纳矩阵
（2）将各节点电压设初值U，
（3）将节点初值代入相关求式，求出修正方程式的常数项向量
（4）将节点电压初值代入求式，求出雅可比矩阵元素
（5）求解修正方程，求修正向量
（6）求取节点电压的新值
（7）检查是否收敛，如不收敛，则以各节点电压的新值作为初值自第3步重新开始进行狭义次迭代，否则转入下一步
（8）计算支路功率分布，PV节点无功功率和平衡节点柱入功率。(Newton-Raphson method flow calculation basic steps : (1) formation of nodal admittance matrix (2) to set up the initial node voltage U, (3) the initial node-generation-related demand. calculated that the constant term formula Vector (4) nodes will be incorporated into the initial voltage-seeking, calculated Jacobian matrix elements (5) solving that equation, seek to amend the vector (6) to strike a new node voltage value (7) to check whether convergence, if not restrained. concentrated in the nodes of the new voltage as the initial value since the first three steps to re-start the narrow iterations. Otherwise, turn into the next (8) Calculation branch power distribution, PV nodes reactive power and balance-node into power.)
- 2007-07-10 19:08:09下载
- 积分：1
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biywshenguanlixitong
图书管理系统用C++编写的图书管理系统，没有使用数据库，用文件读写方式保存(Library management system written using C++ library management system, not using the database stored with the file reading and writing)
- 2011-05-06 22:06:05下载
- 积分：1
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cyfvbkhon
1．原料基本信息维护；
2．供应商基本信息维护；
3. 仓库信息维护；
4．原料入库管理；
5．原料出库管理；
6. 入库信息查询、出库信息查询、库存信息查询。
所有管理包括（增加、删除、修改、查询）。
(A.Raw materials, basic maintenance
Two. Supplier of basic maintenance
Warehouse information maintenance
4. Raw material storage management
5 The raw materials out of the database management
(6) the storage of information inquiry, the library information inquiries, queries of inventory information.
All management (add, delete, modify, query).
)
- 2012-05-13 08:45:14下载
- 积分：1
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MMS_20100911
it维修管理系统+网站，原创，接修、派工、更正、返修，维修记录，客户管理，客户网站查询维修情况等。(it maintenance management system+ site, the original, then repair, dispatching, correction, repair, maintenance records, customer management, customer website maintenance and so on.)
- 2011-06-14 22:26:30下载
- 积分：1
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moon_pos_vel_J2000
通过坐标转换的方法估算月球在某一时刻在J2000坐标系下的位置和速度。（理解航天中坐标转化、时间系统的学习案例）(Through the coordinates of the conversion method to estimate the moon at a time in the J2000 coordinate system under the location and speed. (Understanding of aerospace coordinate transformation, time system learning case))
- 2020-10-07 20:17:36下载
- 积分：1
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Power-system-reliability-analysis
电力系统可靠性分析，清华大学出版 PDF版，系统讲解电力系统可靠性研究领域今年来取得的成果(Power system reliability analysis)
- 2012-03-28 21:48:31下载
- 积分：1
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DATA2A
这是在MATLAB环境下进行电力系统暂态稳定分析的pst源程序，该文件定义了一个4机8节点的系统模型。(This is the MATLAB environment in power system transient stability analysis of the pst source, the document defines a 4-machine system model 8 nodes.)
- 2008-07-18 11:43:47下载
- 积分：1
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OAM
说明： 平面上排布不同旋转角的纳米天线产生不同几何相位调制用生成涡旋光(The vortex is generated by the different geometric phase modulation of the nanometer antenna with different rotation angles arranged on the plane)
- 2021-03-23 17:09:15下载
- 积分：1
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zishiyingguangxuefangzheng
自适应光学应用的一篇文章，可用于大气湍流和远距离观察时参考！(Adaptive optics applied to an article, can be used for reference atmospheric turbulence and remote viewing!)
- 2015-10-04 14:46:10下载
- 积分：1
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C-W
使用CW方程，使用最小能量，采用脉冲推力，实现在一天内两航天器的交会对接。本质上就是一个交会轨道优化问题，由给定的条件优化选取设计变量，使目标函数得到最优值。(Using the CW equation, use the minimum energy, the use of pulse thrust, to achieve in a day two spacecraft rendezvous and docking. Is essentially an intersection orbit optimization problem, by the given conditions to optimize the selection of design variables, so that the objective function to get the optimal value.)
- 2017-05-11 20:05:29下载
- 积分：1
