Aiming for the various type hydropower stations,artificial neural network with Genetic Algorithm have been adopted to establish the energy characteristic model of the hydropower station.In this paper,the polynomial method is adopted uniformly to calculate sectional head loss of water diversion pipeline for each water turbine generating set respectively.For the relationship of the downstream water level and the flow,besides the application of the polynomial calculation method,for the special case,the logic condition input mode is introduced to be programmed and the system for general optimization of hydropower station is also designed having been in trial operation for some hydropower stations which show the good adaptability in processing the parameters,head loss and downstream water level and so on.

针对我国一些小水电站技术力量薄弱,运行水平低的问题,采用近代的一些智能计算方法、三维实体造型方法以及多种软件开发语言,研制开发出一套小水电站辅助运行系统。系统具有特性分析、模拟运行、优化运行和虚拟结构等多种功能,可以用于指导水电站中水轮发电机组的运行,有效地提高水电站的经济效益和水轮发电机组的使用寿命。

In order to know the real time operation condition of hydroturbine unit and realize the optimal and economical operation of hydropower station,a set of monitoring and data storage system with the integrated functions of data acquisition,real time 3D display of operation condition and data storage is developed with the techniques of virtual instrument and MATLAB.The principle for measuring the parameters of the turbine unit is briefly introduced herein,and then the design of the virtual instrument based main control interface and the method for the hybrid programming of LabVIEW and MATLAB are described in detail as well.The operation practice shows that the system is flexible and convenient in operation;with which the real time operation condition of the hydroturbine unit can be visually expressed with 3D display.

The virtual reality technology is used to achieve three-dimensional modeling and browsing of oil system in hydropower station.The entire oil system is divided into smaller parts for static modeling.And the virtual technology and LOD nodes are applied to dynamic integration at the different levels.Displaying with different precision is realized for scenario of oil system in browsing and assembling at the same time,which decreases the memory requirements and raises the browsing speed.Thus,it can be applied to the field of auxiliary equipment training and teaching in hydropower station.

In order to accurately grasp the operating condition of hydro-generating units and realize the optimal and economic operation of hydroelectric power stations,a real-time monitoring system of hydraulic units operating parameters with the data acquisition and data management capabilities is designed by virtual instrument techniques.This paper focuses on the measuring principle of hydraulic parameters and the hardware implementation of the system and VI-based software design method.The operating practice shows that the monitoring system is flexible in operation and user-friendly,and it is relatively reliabile and stabille.

The casing of centrifugal pump in the design process,because it has many diverse curved surfaces,especially its diffuser which transits from trapezoidal section to circular cross section is irregular curved surface.This makes the design more difficult.To solve this problem,in this paper,using Pro/ENGINEER to realize modeling and to research its 3D parametric design by means of secondary development tool of Pro/Toolkit.At the same time,adding menu and dialog box to operate its 3D and parametric design in the system.

In order to predict the changing trends of the reservoir water quality,based on the real-measuring data of water quality and the principle of helix cellular automata to organize the sampled data,a BP neural network prediction model was proposed,and an open and flexible prediction system based on virtual instrument was developed.This system was developed by using LabVIEW and C++,the test results show that the model is accurate,simple to use,and it is strongly feasible and practical,it can be adapted for different users and environments.

鉴于降雨量受众多因素的影响和具有复杂的非线性特点,提出将最小二乘支持向量机用于预测降雨量。最小二乘支持向量机(LSSVM)基于结构风险最小化,能够较好地协调经验风险最小化和学习机器VC维之间的关系,并且LSSVM在支持向量机(SVM)的基础上,通过将价值函数改为最小二乘价值函数,以及用等式约束代替不等式约束,将求解的二次规划问题转化线性方程组求解,采用径向基核函数,得到LSSVM模型的待定参数比标准支持向量机少,仅为2个。在Matlab环境下建立了最小二乘支持向量机的降雨预测模型。经实例验证,该模型收敛速度快、预测精度高。与基于RBF神经网络的降雨量模型相比,基于最小二乘支持向量机的降雨量模型具有更强的预测能力。

It has a low accuracy to forecast concrete strength utilizing NN prediction model directly because relation of sample data describing high-strength concrete mixture ratio is complicated. In this paper, the sample data is grouped according to its distribution rule based on clustering analysis firstly, and then, the NN fitting model is developed for every last sample data grouping. In this way, the forecasting accuracy of concrete strength inferences with smaller margins of error to many sample data has been made.

This paper presents the methods of connecting AutoCAD with Access database by utilizing the ODBC, of getting data from the outer database by ObjectARX and of designing interface by using MFC in the ObjectARX. With the help of these methods, the program can read the data in the mechanical standard parts library and calculate the coordinate of the points and draw standard parts by using ObjectARX entity object. The use of standard parts library can decrease the repetitive work of mechanic designers and increase the working efficiency.

遗传算法中,基因型串结构数据表示为无符号二进制整数,但在传统程序设计中,数据中的"0"和"1"是以字符(char)形式存储的,这样表示的基因数据不仅在数据结构上和实际存在差异,多占用了内存空间,而且也使算法中的操作实际是字符串操作.利用C++面向对象设计思想,通过引入二进制位集合类,使基因型数据真正表示为二进制位(bit)数据,并改进了数据的存储方式,减少了内存需求,使遗传操作编程更方便.

简述了基于MDT平台应用ObjectARX及MCAD API进行二次开发的方法,详细介绍了利用此方法进行离心泵蜗壳三维造型的实现原理及设计过程.

介绍了一种离心泵虚拟设计系统的开发方法.在该系统控制下,可进行离心泵初步设计,完成整体水泵的计算机三维造型,输出水泵部件的零件图,并可对设计参数进行交互修改.

对SPX488型汽车尾气分析仪的工作原理和使用进行了简要介绍.根据该仪器对采集的数据需全部人工分析处理的实际情况,开发了相应的通讯及数据处理软件,实现了计算机自动分析处理.

排课表问题是一个涉及因素多、结构复杂的典型组合规划问题.采用面向对象分析方法设计的课表编排系统具有结构稳定、易维护、易重用的特点,使得系统的扩充与修改十分方便.此外,对排课表问题涉及的算法及数据模型进行了讨论,为各类不同高校开发排课软件找到了一种实用方法.

介绍了在Delphi中利用VB的MSComm组件实现微机对488型汽车尾气检测仪的汽车尾气参数进行自动检测的方法,讨论了对采集的参数进行自动分析及处理的技术.

在Delphi中,借助VB的MSComm组件实现了计算机和488型汽车尾气检测仪的通信,详细介绍了MSComm组件在Delphi下的安装方法,检测仪的工作过程、命令格式及程序设计方法.

本文介绍了PCI保护卡的基本原理并以一个实例说明了设置保护卡的方法和这一过程中常见问题的解决.

主要介绍了一种离心泵交互式计算机辅助设计软件的开发思想和方法,阐明了利用ARX接口在Auto CAD基础上进行类似的CAD应用软件开发具有其他方法不可比拟的优越性.

为采用全区统一分析的方法进行计算，对挖掘范围进行了深入研究，确定用整区网格布点法来求解铲斗方位域，为此，对区域进行了标定和排序；并对铲斗方位域的变化规律进行了分析，还给出了综合计算表格和电算流程框图。