新疆吐鲁番胜金口小流域淤地坝优化设计方案

淤地坝在吐鲁番胜金口小流域水土保持工程中取得了良好的效果,坝区土质为低液限粉土,筑坝条件较差,但料场开采筑坝料运距较远、投资较大,且会引起料场开采过程的二次水土流失.通过对坝体进行优化设计,利用坝区开挖料进行筑坝,节省了投资,为当地乃至其他类似条件地区淤地坝设计方案提供了宝贵的经验.     

芳砜桥型合成鞣剂的组成和结构研究

本文合成了一种新的芳砜桥型鞣剂。用化学方法分离出其有效成分，用ＨＰＬＣ，ＧＰＣ，ＩＲ，ＭＳ等现代手段对其组成和结构，分子量大小及分布进行了研究。结果表明，该鞣剂属砜桥型代替性婊剂，ＩＲ谱有明显的芳砜基特征吸收峰，与意大利Ｓｅｉｃｉ公司典型的白色革芳砜鞣剂ＮｕｂｕｃｔａｎＳＢ的特征吸收峰一致；鞣质部分由八个极性不同的组分组成，分子量分布宽，大小适中，对皮胶原纤维有良好的渗透层次。应用结果表明，该鞣剂是当前较为理想的白色革复鞣剂。此外．本文建立的缩聚物（禁质）的分离及组成结构表征方法也可适用于其它芳香族合成鞣剂的研究。     

单通道步距角微机测试系统

介绍了一个以旋变作为传感器的单通道步距角测试系统，系统中由于采用了电压检零电路，使传统的双通道测试系统简化为单通道测试系统，简化了多极旋变的结构和工艺及系统的硬件组成，降低了整个系统的造价，提高了测试精度，以及整机的可靠性，是一个有实际应用价值的位置检测系统。     

基于Profibus的温室控制信息管理系统

Profibus由于其强大的功能在工业现场中有着广泛的应用,本文研究了Profibus现场总线温室控制信息管理系统的原理与组成.控制系统的硬件平台由SIEMENS公司的IM180主站和IM183从站接口板构成,图形用户界面软件采用VB、SQL Server、3DSMax等软件开发,该系统已在实际中得到成功应用.     

基于最优基小波的基桩弱损伤应力波检测

从提高小波分析与基桩弱损伤检测的匹配性入手，提出了基于最优基小波连续小波变换的基桩应力反射波无损检测方法。该方法首先引入膨胀参数把标准Marr基小波扩展为Marr基小波空间，增强了基小波选取的自由度；进而依赖工程目的和分析对象建立香农熵测度以确定Marr最优基小波；最后采用最优基小波对基桩检测应力波进行连续小波变换，模谱的局部能量集中指示了桩底反射。基桩动力测试数值实验验证了方法是可行、有效的，且最优基小波能够有效地提高弱损伤检测精度。     

Cross-layer modeling of adaptive wireless links for QoS support in heterogeneous wired-wireless networks

Future wired-wireless multimedia networks require diverse quality-of-service (QoS) support. To this end, it is essential to rely on QoS metrics pertinent to wireless links. In this paper, we develop a cross-layer model for adaptive wireless links, which enables derivation of the desired QoS metrics analytically from the typical wireless parameters across the hardware-radio layer, the physical layer and the data link layer. We illustrate the advantages of our model: generality, simplicity, scalability and backward compatibility. Finally, we outline its applications to power control, TCP, UDP and bandwidth scheduling in wireless networks. The work by Q. Liu and G. B. Giannakis are prepared through collaborative participation in the Communications and Networks Consortium sponsored by the U.S. Army Research Laboratory under the Collaborative Technology Alliance Program, Cooperative Agreement DAAD19-01-2-0011. The U.S. Government is authorized to reproduce and distribute reprints for Government purposes notwithstanding any copyright notation thereon. The work by S. Zhou is supported by UConn Research Foundation internal grant 445157. Qingwen Liu (S’04) received the B.S. degree in electrical engineering and information science in 2001, from the University of Science and Technology of China (USTC). He received the M.S. degree in electrical engineering in 2003, from the University of Minnesota (UMN). He currently pursues his Ph.D. degree in the Department of Electrical and Computer Engineering at the University of Minnesota (UMN). His research interests lie in the areas of communications, signal processing, and networking, with emphasis on cross-layer analysis and design, quality of service support for multimedia applications over wired-wireless networks, and resource allocation. Shengli Zhou (M’03) received the B.S. degree in 1995 and the M.Sc. degree in 1998, from the University of Science and Technology of China (USTC), both in electrical engineering and information science. He received his Ph.D. degree in electrical engineering from the University of Minnesota, 2002, and joined the Department of Electrical and Computer Engineering at the University of Connecticut, 2003. His research interests lie in the areas of communications and signal processing, including channel estimation and equalization, multi-user and multi-carrier communications, space time coding, adaptive modulation, and cross-layer designs. He serves as an associate editor for IEEE Transactions on Wireless Communications since Feb. 2005. G. B. Giannakis (Fellow’97) received his Diploma in Electrical Engineering from the National Technical University of Athens, Greece, 1981. From September 1982 to July 1986 he was with the University of Southern California (USC), where he received his MSc. in Electrical Engineering, 1983, MSc. in Mathematics, 1986, and Ph.D. in Electrical Engineering, 1986. After lecturing for one year at USC, he joined the University of Virginia in 1987, where he became a professor of Electrical Engineering in 1997. Since 1999 he has been a professor with the Department of Electrical and Computer Engineering at the University of Minnesota, where he now holds an ADC Chair in Wireless Telecommunications. His general interests span the areas of communications and signal processing, estimation and detection theory, time-series analysis, and system identification -- subjects on which he has published more than 200 journal papers, 350 conference papers and two edited books. Current research focuses on transmitter and receiver diversity techniques for single- and multi-user fading communication channels, complex-field and space-time coding, multicarrier, ultra-wide band wireless communication systems, cross-layer designs and sensor networks. G. B. Giannakis is the (co-) recipient of six paper awards from the IEEE Signal Processing (SP) and Communications Societies (1992, 1998, 2000, 2001, 2003, 2004). He also received the SP Society’s Technical Achievement Award in 2000. He served as Editor in Chief for the IEEE SP Letters, as Associate Editor for the IEEE Trans. on Signal Proc. and the IEEE SP Letters, as secretary of the SP Conference Board, as member of the SP Publications Board, as member and vice-chair of the Statistical Signal and Array Processing Technical Committee, as chair of the SP for Communications Technical Committee and as a member of the IEEE Fellows Election Committee. He has also served as a member of the IEEE-SP Society’s Board of Governors, the Editorial Board for the Proceedings of the IEEE and the steering committee of the IEEE Trans. on Wireless Communications.     

LDV技术用于电机瞬态转速的测量

本文提出了一种利用激光多卜勒效应实现电机瞬态转速测量的新方法,并对几种电机的运行过程进行了动态测试。该方法具有非接触性,反应速度快,测量精度高等特点,尤其适用于对微特电机和小型旋转部件的动态测试,是一种有广泛应用前景的测试手段。     

一种测量天空亮度的新方法

本文介绍了一种测量天空亮度分布的新方法。这种方法利用视场角为180°的鱼眼镜头照相机和计算机数字图像处理系统,实现了天空亮度分布的瞬时测取和胶片密度的高效率处理。文中论述了胶片灰度与天空亮度的标定转换实验方法。引用了误差理论中的数据处理方法确定出二者间的函数关系。通过对昆明和重庆地区晴和阴天空下大量实测结果的误差处论和分析,得到了其相关系数和标准偏差的频数分布图,由此证明了这种方法的可靠性。     

东濮凹陷挥发油特性及勘探方向

东濮凹陷现已查明的文 72、文 88、文 1 3东等 3个挥发油油藏的流体性质明显不同于其它油气藏 ,不仅具有原始溶解气油比高、体积系数高、饱和压力高、饱和油压缩系数高、气体平均溶解系数高、收缩率高和饱和油密度低、流体黏度低的特性 ,而且在化学成分、PVT特征、体积收缩特征等方面也很特殊。在形成条件方面与其它油气藏相比也有其特殊性 ,质量好、成熟良高的生油岩是油藏形成的物质基础 ,巨厚的盐膏岩、膏泥岩或泥页岩沉积组合作盖层和侧向封堵是油藏的圈闭条件 ,埋藏深有利于高气油比流体的运移聚集 ,深部地温高有利重烃热裂解为轻烃 ,并能提高油藏的气油比 ,馆陶期以后地层未受构造运动影响 ,是保存油藏的重要条件。阐述该类油藏的开发规律认为 ,东濮凹陷寻找挥发油油藏的主要地区和层位是 :长垣断层下降盘沙三中4— 10 —沙三下 ;文东构造带北部沙三中4— 10 —沙三下1— 4;白庙—桥口构造深层沙三中—沙三下亚段以及刘庄地区沙二下亚段。图 4表 2参 2     

基于DSP的数字PID控制在SPM中的应用

首先介绍了以DSP为核心搭建的扫描探针显微镜（SPM）的硬件基础,进而利用DSP代替模拟PID控制器的常规电子线路,并采用相应PID软件程序的控制,从而实现了针对于SPM系统的数字PID控制方案。该控制方案使得SPM在扫描过程中可以通过自定义算法来进行信号控制和调节,从而克服了以往模拟量PID控制系统灵活性差、不易维护和升级等缺陷。