Measurement system for wind turbine acoustic noise assessment based on IEC standard and Qin＇s model

A novel measurement system specially used in noise emission assessment and verification of wind turbine generator systems is presented that complies with specifications given in IEC 61400-11 to ensure the process consistency and accuracy. Theory elements of the calculation formula used for the sound power level of wind turbine have been discussed for the first time, and detailed calculation procedure of tonality and audibility integrating narrowband analysis and psychoacoustics is described. With a microphone and two PXI cards inserted into a PC, this system is designed in Qin＇s model using VMIDS development system. Benefiting from the virtual instrument architecture, it＇s the first time that all assessment process have been integrated into an organic whole, which gives full advantages of its efficiency, price, and facility. Mass experiments show that its assessment results accord with the ones given by MEASNET member.     

2007年深圳大学学术报告速递（Ⅱ）

.2007-04-13英国诺丁汉大学邱国平博士应邀做《基于图形模型的交互式视觉处理》报告..2007-04-19中国科学院王天及教授应邀做《现代光显示技术进展》报告..2007-04-20新加坡国立大学王新刚博士应邀做《Oscillations of complex networks》报告..2007-04-22中国科学院赖仞教授应     

基于CAXA实体设计2007的螺栓参数化设计

一、前言 在现代的制造型企业中,设计并不仅仅满足于传统的二维图纸设计,它已经逐步地过渡到三维模型设计中.     

意大利圣·朱斯蒂纳坝实时洪水预报

介绍了用于意大利圣.朱斯蒂纳坝的实时洪水预报方法。根据10 a的小时库水位资料进行流量反演算,并重新构造了洪水系列。采用年最大流量与降雨深资料对简单的水文模型进行调整。考虑相应的洪水事件(11 a一遇洪峰流量),利用蒙特卡罗模拟法为洪峰流量预报制定了统计上可靠的方案。     

将高新科技成果转化为采油工业生产力的若干途径（待续）

采油工业是科技密集行业，在当前新旧世纪交替的关键时期，世界石油科技发展很快，市场竞争激烈。纵观我国采油工业的发展，近年来新投入开发的油藏和新发现油藏矿场地质特征越来越，质结构复杂油藏、低渗透非均质油藏，底水油藏、气顶油藏、稠油油藏以及地面条件困难油藏等所占比例也越来越大。     

电荷偶合器件的电路模型

扼要地分析了现代信号处理器件ＣＣＤ的基本原理、技术特点和电学特性，并在此基础上提出了ＣＣＤ器件的电路模型，为ＣＣＤ器件设计、应用提供了一种较为简便的分析计算方法。