永磁电机直接驱动变速恒频风力发电控制技术

本文采用永磁同步电机，通过带有中间直流环节的IGBT转换器将电机发出的变频变幅交流电转换成可用的交流电，通过控制整流器电流来控制发电机转速从而控制风力机。     

在"中国青年咨询工程师论坛成立大会暨首届青年论坛"开幕式上的讲话

今天，我们召开“中国青年咨询工程师论坛”成立大会暨首届论坛会，我感到非常高兴。历时1年多的筹备工作就要画上一个圆满的句号，而“青年论坛”的发展即将掀开崭新的一页。在筹备过程中，各有关单位和许多同志给予我们协会积极配合和大力支持，特别是上海投资咨询公司的彭厚安董事长、梁玉源总经理(也是我们协会的副会长)以及周荣生同志为此做了大量的工作，付出了艰辛的劳动。     

基于V/T变换的电容传感器新型电容测量电路

提出了一种基于V／T变换的用于电容传感器的电容测量电路。它将被测微小电容变化量转换成时间信号并由单片机进行处理，电路结构简单，电路中没有影响测量稳定性和产生零点漂移的元器件，大幅度地降低了测量过程中的噪声。     

3-D temperature distribution of a full size BF copper stave with oblate channel

An experiment of a new type full size copper stave for a real blast furnace was carried out in a special-designed experimental system. The 3-D temperature distribution inside the stave including isotherm was obtained based on the experiment data. And the effects of the temperature of cooling water and the velocity of the water as well as the temperature of the furnace on the 3-D temperature distribution were obtained. The experimental and calculation results show that the highest temperature of the hot surface is lower than 90℃ which is very good for the solidified slag formation on the hot surface and protecting the stave.     

苯酚氧化法合成邻苯二酚

系统地介绍了邻苯二酚的合成方法，重点综述了苯酚氧化法合成邻苯二酚的研究进展．建议我国应尽快引进或开发国外已工业化的双氧水氧化技术生产邻苯二酚以满足国内市场对邻苯二酚的需求，而把研究工作放在沸石催化的双氧水氧化法和有机金属络合物或酶催化的空气液相氧化法，以赶上国际先进水平．     

基于B／S结构模式的图书馆电子阅览室管理系统设计与实现

在评析传统的图书馆阅览室数据管理模式的基础上，提出了基于B／S模式的管理系统结构模型，并对B／S模式进行了简要介绍，对JSP技术进行了探讨，着重阐述了系统的基本功能以及系统的实现。     

Delay-dependent robust stability criteria for uncertain neutral systems with mixed delays

This paper concerns the problem of the delay-dependent robust stability of neutral systems with mixed delays and time-varying structured uncertainties. A new method based on linear matrix inequalities is presented that makes it easy to calculate both the upper stability bounds on the delays and the free weighting matrices. Since the criteria take the sizes of the neutral- and discrete-delays into account, it is less conservative than previous methods. Numerical examples illustrate both the improvement this approach provides over previous methods and the reciprocal influences between the neutral- and discrete-delays.     

干熄焦旋转焦罐车设计中的几个问题

对干熄焦旋转焦罐车的开门机构、传动机构、定位机构、材料等设计问题进行了分析 ,探讨了解决的方法 ,提出了设计思路     

饮酒后人体血液中酒精含量变化规律的数学模型

本主要讨论饮酒后酒精含量在人体血液中的变化规律。根据已知的一组数据，利用MATLAB软件，采用分段非线性拟合的方法，得到酒精含量变化规律的数学模型。本得到的数学模型与已知数据的拟合效果好。以此为基本模型，推出了在几种不同的饮酒方式下，产生的相应的酒精含量变化规律的数学模型。并且根据我们的模型，通过图象及其数据分析，首先对某个司机碰到的违章情况给予了解释；其次对司机喝了3瓶啤酒后多长时间内驾车会违章给出了回答；第三估计了血液中酒精含量在什么时候最高；第四对司机天天喝酒。是否还能开车，进行初步分析。     

Control of acrobot based on Lyapunov function

Fuzzy control based on I-yapunov function was employed to control the posture and the energy of an acrobot to make the transition from upswing control to balance control smoothly and stably. First, a control law based on I-yapunov function was used to control the angle and the angular velocity of the second link towards zero when the energy of the acrobot reaches the potential energy at the unstable straight-up equilibrium position in the upswing process. The controller based on I-yapunov function makes the second link straighten nature relatively to the first link. At the same time, a fuzzy controller was designed to regulate the parameters of the upper control law to keep the change of the energy of the acrobot to a minimum, so that the switching from upswing to balance can be properly carried out and the acrobot can enter the balance quickly. The results of simulation show that the switching from upswing to balance can be completed smoothly, and the control effect of the acrobot is improved greatly.