A calibration method for the energy-integrating function in photovoltaic system monitoring

Solar radiation has an irregularly varying factor due to a basic day and night cycle and climatic conditions. For such conditions a data sampling interval is important to ensure the accuracy of energy monitoring in a photovoltaic system. While treating a system monitoring equipment as a black box. the author has developed the method of calibrating an energy-integrating function. At first for various input waveforms, the relationship between sampling intervals and quasi-integration outputs have been examined by trapezoidal rule. In the numerical simulation the phases of the sampling clock also are considered Then it is concluded that a sampling interval can be inspected through outside observation only by using a rectangular single pulse. By applying the pulse to the energy-integrating process, two kinds of integrated outputs can be obtained for different sampling phases. The calculated difference between both outputs can uniquely give the sampling interval being inspected. Conditions to ensure measuring accuracy are discussed and the validity of this method has been demonstrated experimentally. Practical calibrating procedures also are proposed for the integrating function of PV system monitoring.     

A singular loop transformation framework based on non-singular matrices

In this paper, we discuss a loop transformation framework that is based on integer non-singular matrices. The transformations included in this framework are called Λ-transformations and include permutation, skewing and reversal, as well as a transformation calledloop scaling. This framework is more general than existing ones; however, it is also more difficult to generate code in our framework. This paper shows how integer lattice theory can be used to generate efficient code. An added advantage of our framework over existing ones is that there is a simple completion algorithm which, given a partial transformation matrix, produces a full transformation matrix that satisfies all dependences. This completion procedure has applications in parallelization and in the generation of code for NUMA machines. This work was supported by the Cornell Theory Center, NSF Presidential Young Investigator award #CCR-8958543. by NSF Grant #CCR-9008526, and by a grant from the Hewlett-Packard Company.     

基于模板的．Net三层架构的代码自动生成

三层架构是数据库开发中最常用的分层架构。三层结构能够提高代码重用率,降低项目开发难度。为了解决手工编写三层架构的代码工作量大且容易出错的问题,使用．Net平台提供的动态编译和反射技术,设计并实现了基于可定制模板的自动代码生成器。该代码生成器利用三层架构的代码依赖数据库的架构信息这一特点,以数据库架构信息、Xml配置文件和模板文件作为输入,输出三层架构的各层代码。用户可以修改Xml配置文件的内容和使用该代码生成器提供的模板语言定制、修改自己的模板文件,方便、灵活地控制输出的目标代码。代码生成器的使用在实际的项目开发中具有重要的意义。     

Exact probabilistic testability measures for multi-output circuits

The computation of probabilistic testability measures has become increasingly important and some methods have been proposed, although the exact solution of the problem is NP-hard. An exact analytical method for singleoutput combinational circuits is extended to deal with multi-output circuits. Such circuits are reduced to singleoutput ones by introducing a dummy gate, the X-gate, and applying to the resulting graph the analysis based on supergates.     

A review of the linear term in the low-temperature specific heat of La2CuO4 and La2?xMxCuO4 (M = Ba, Ca, Sr)

In this report I will summarize the results of an extensive review of the low-temperature specific heat of the La-based high-temperature superconductors, withT _c between 30 and 40 K, and the related nonsuperconducting compound La₂CuO₄. There have been two previous studies by Fisheret al. [1] and Fischeret al. [2] which also reviewed the low-temperature specific heat of these materials. This work was undertaken to extend a similar study of the 90 K superconductor YBa₂Cu₃O_7– which we recently completed [3]. This review will focus exclusively on the low-temperature specific heat and will update the previous studies by including recent results.     

太阳能帆板输出功率短期预测研究

在卫星观测中,经常由于各种原因导致短时间内无法提取目标卫星数据,使控制系统无法继续对其保持高精度跟踪和控制。文章主要研究ARIMA模型在卫星遥测数据短期预测中的应用。使用Matlab软件进行ARIMA模型参数计算,再使用SPSS软件执行数据预测,并进行残差分析,通过实例验证,短时期内的预测数据精度较高。     

The highly inappropriate calibrations of statistical significance.

Comments that an article had used the term "highly significant" to describe an empirical result. The author considers such a modifier to statistical significance is entirely inappropriate on 2 counts. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

改进的形态学运算在声纳图像生成中的应用

声纳技术应用日益广泛,已成为海洋测量的重要工具,而去除噪声处理是对声纳图像进行正确判读的前提,本文采用了改进的形态学算法减少声纳图像中噪声的影响,对图像进行预处理,采用Matlab图形图像处理工具对处理的算法进行仿真的方式,从而使处理效果达到最佳。     

可视化基站发电管理系统

针对以前的发电管理系统或只是数据呈现,提供市电及发电相关数据信息,或只是提供出车轨迹,主要实现对出车的管理,不能全面反应发电全过程且不便于对发电事件进行分析的情况,提出可视化发电管理系统的概念。在简要介绍了LBS系统、动力环境监控系统后,讲述了可视化基站发电管理系统的组成以及通过LBS定位管理、短信互动、实时监测数据等进行系统实现。可视化发电管理系统通过可视化的界面帮助发电管理人员进行管理,直观、便捷。