葛洲坝水力发电厂自动化技术应用概述

以葛洲坝水力发电厂主要自动化技术应用与设备改造为线索，重点回顾 了该厂实现计算机实时监控、全面提高综合自动化水平的历程；全面总结了该厂为实现“无 人值班”（少人值守）而进行的自动化设备换型改造情况和自动化新技术的应用情况；简要 阐述了自动化技术应用给该厂在运行和管理方面带来的深刻变化；展望了该厂未来自动化技 术应用的前景。     

综合孔径微波辐射计二阶量化数字相关器研究

微波辐射计作为一种无源遥感器,在遥感技术领域有着巨大的应用前景.传统的微波辐射计的空间分辨率受到天线孔径的限制.综合孔径微波辐射计利用了干涉测量原理和复相关技术,是一种可以有效地提高空间分辨率的新型辐射计.本文针对综合孔径微波辐射计的数字相关器进行了深入研究,分析论证了二阶量化数字相关器的工作机理,并对采用该种相关器的系统的信噪比进行了分析.初步的试验验证结果证明了该方案的有效性.     

On the development of a direct method of determining the microcrack resistance curve

This report deals with direct observations of microcrack linkage at the crack tip prior to macroscopic crack initiation. It is shown that this process is directly linked to the inclusion distribution in the material and can be considered in terms of an R curve to describe microcrack development.     

固井声幅-变密度测井的影响因素分析

利用声幅－变密度测井进行固井质量的评价受到诸多因素的影响，各种影响因素对声幅－变密度测井资料的影响作用有较大的差异，根据大量测井资料分析和实验研究，对仪器偏心、测井时间，套管尺寸与重量，地层岩性，气侵、水泥环微间隔等因素的影响作用进行了较为深入的分析，为各种影响因素的识别与校正提出了相应的方法和依据。     

挤压力对晶体生长速度及枝晶间距的影响

研究了挤压铸造时挤压力对宏观晶体生长速度的影响，给出了晶体生长速度表达式。结果表明：挤压力对合金宏观晶体生长速度的影响除与合金成分有关外，在某些挤压条件下，当形核率的增加幅度超过长大速度时，则挤压力可使宏观晶粒细化；反之，会使宏观晶粒变粗。随着挤压力的提高，合金凝固速度加快，一次枝晶间距和二次枝晶间距都随之减小，从而细化了树枝晶。     

On the interior resonance problem when applying a hybrid FEM/MoMapproach to model printed circuit boards

A hybrid finite element method/method of moments (FEM/MoM) technique is used to analyze a printed circuit board power bus structure where the source and observation points are in the near field. The FEM is used to model the lossy region between the planes of the board including the source. The MoM is used to model the region outside the planes and provide a radiation boundary condition to terminate the FEM mesh. Numerical results for a bridged power bus structure are compared with measurements. A nonphysical interior resonance of the electric field integral equation is observed. The problem can be avoided by using a hybrid technique based on a combined field integral equation     

An iterative ADI-FDTD with reduced splitting error

We present a new iterative alternating-direction-implicit finite-difference time-domain (ADI-FDTD) method. By recognizing the ADI-FDTD method as a special case of a more general iterative approach to solve the Crank-Nicolson (CN) FDTD scheme, the splitting error in ADI-FDTD can be reduced systematically. Numerical examples are used to illustrate the improved accuracy of this method.     

美国、加拿大城市规划与建设考察报告

为扩大我省工程咨询业在国外的影响,进一步加强工程咨询企业的国际合作,学习和借鉴发达国家在城市规划与建设领域的先进理念和经验,受美国、加拿大相关部门的的邀请,经省发展改革委批准,由江苏省工程咨询协会组织的业内领导及工程咨询专业技术骨干赴美国、加拿大考察团一行9人,于6月15日至27日对美国、加拿大城市规划与建设情况进行了学习考察.     

Further study on the cooling correction in bomb calorimetry: Theoretical aspects of approximate formulae

On the basis of the compensation of errors it is postulated that the most accurate correction may not always give the most accurate result for calorific value, and experimental evidence for this is presented. A new criterion is therefore suggested for judging the best (not necessarily the most accurate) cooling correction. Using this principle the cooling correction formula previously proposed is improved which results in higher accuracy whilst retaining the original simplicity.     

Motion and structure interpretation of an optical switch

This paper focuses on tracking, reconstruction and motion estimation of a well-defined MEMS optical switch from a microscopic view. For out-of-view reconstruction, a homography capable of transforming feature points and feature lines between a microscopic image and a CAD model of the switch is implemented. The homography between two sequential microscopic images is decomposed and factorized for motion estimation. Optical flow has also been explored to provide rough estimations of rotation centre and angle. The paper also illustrates motion parameter optimization principles to deal with uncertainty inherent in micro world. After non-linear optimization, estimation accuracy for rotation angle and rotation centre can reach 0.06° and pixel level, respectively.