基于拉曼光谱和线性判别对于洗衣皂的检测研究

对13种洗衣皂进行拉曼光谱的数据收集,对拉曼光谱数据预处理后,利用5种不同的机器学习方法对于不同品牌洗衣皂进行训练和测试.训练集中5种模式识别方法,准确性从高到低依次为:线性判别、子空间判别、最近邻、决策树、支持向量机,其中线性判别和子空间的识别率均高于95％,训练效果较好.测试集中线性判别和子空间判别识别率高于90％...     

透过专利看微处理器的技术发展（二）——Cache专利布局

本文从专利的年度申请量、技术分布、专利权人分布、法律状态、生命周期等方面，对微处理器中的核心技术“高速缓冲存储器（Cache）”相关专利进行了详细论述。分析显示，多核设计中的技术研究重点，如Cache一致性技术，缓存监听（Snooping）技术，其专利主要掌握在少数国际大公司手中。对专利技术生命周期分析表明，自可考证的美国Cache专利至今，Cache技术已经历了萌芽期、发展期、成熟期，目前已进入衰退期，而中国的Cache专利申请相对美国的情况滞后2—3年。专利文献通常早于技术文献公开，因此美国Cache专利的分布对相关研发人员具有一定的参考意义。     

西四环暗涵工程典型段初期支护施工技术初探

南水北调中线北京段西四环暗涵为砂砾(卵)石地层,采用浅埋暗挖法施工。其中,暗涵工程交叉管线众多,在西四环立交桥桩基中间穿过,浅埋暗挖法施工有一定的难度,为此,对南水北调中线北京段西四环暗涵浅埋暗挖典型段施工技术进行总结,以为今后类似工程提供参考和借鉴。     

A new algorithm for automatic knowledge acquisition in inductive learning

The objective of this study is to present a new algorithm, REX-1, developed for automatic knowledge acquisition in Inductive Learning. It aims at eliminating the pitfalls and disadvantages of the techniques and algorithms currently in use. The proposed algorithm makes use of the direct rule extraction approach, rather than the decision tree. For this purpose, it uses a set of examples to induce general rules. Using some widely used set of examples such as IRIS, Balance and Balloons, Monk, Splice, Promoter, Lenses, Zoo, and Vote, our algorithm is compared with other well-known algorithms such as ID3, C4.5, ILA, and Rules Family.     

水轮机涡带压力脉动影响因素及模型试验方法的研究

本文通过对大量试验资料的分析讨论,探讨了空化系数、水头等对水轮机涡带压力脉动的影响,介绍了小空化系数条件下的“削波”现象,探讨了“削波”现象对压力脉动幅频特性分析的影响,并就模型试验中采集时间的选取、脉动波形的分析方法等进行了探讨。     

一种基于CORBA的分布式应用模型

在对CORBA通信机理研究的基础上,提出了一种以CORBA技术为基础面向对象的分布式应用模型。该模型通过封装CORBA的复杂性,降低开发分布式应用的难度,提高开发效率,提供分布式对象之间的透明访问。以中间件的形式实现了这个模型并做了测试。     

Control and real-time optimization of an automotive hybrid fuel cell power system

A real-time optimization method is used to find the point of maximum fuel efficiency of a hybrid fuel cell power system, in an automotive application. The controller performs as the master control in cascade with lower level controls. The lower level controls distribute the power between the ultra-capacitor and the fuel cell, during transients, to find the optimum operating point of the power system. The ultra-capacitor is used to protect fuel cell health and improve phase characteristics of the system. In simulations, the controller is able to find the optimum operating point for the hybrid system without requiring previous knowledge of the system dynamics or explicit representation of the optimization function.     

Mac OS X v10.6 Snow Leopard操作系统底层技术分析

桌面操作系统随着个人计算机硬件的进步飞速发展。以Unix为基础的MacOSX在最近一次主要升级Mac OS X 10.6 Snow Leopard中对底层技术进行了重要的革新,引入了64位内核、Grand Central Dispatch、Open CL等新技术。底层技术的更新为开发人员提供了更友好的多线程,更深入的发掘了硬件的潜力,也为操作系统的进一步的发展奠定了基础。     

Use of parallel deterministic dynamic programming and hierarchical adaptive genetic algorithm for reservoir operation optimization

Reservoir operation optimization (ROO) is a complicated dynamically constrained nonlinear problem that is important in the context of reservoir system operation. In this study, parallel deterministic dynamic programming (PDDP) and a hierarchical adaptive genetic algorithm (HAGA) are proposed to solve the problem, which involves many conflicting objectives and constraints. In the PDDP method, multi-threads are found to exhibit better speed-up than single threads and to perform well for up to four threads. In the HAGA, an adaptive dynamic parameter control mechanism is applied to determine parameter settings, and an elite individual is preserved in the archive from the first hierarchy to the second hierarchy. Compared with other methods, the HAGA provides a better operational result with greater effectiveness and robustness because of the population diversity created by the archive operator. Comparison of the results of the HAGA and PDDP shows two contradictory objectives in the ROO problem-economy and reliability. The simulation results reveal that: compared with proposed PDDP, the proposed HAGA integrated with parallel model appears to be better in terms of power generation benefit and computational efficiency.     

论述工程中建筑物智能化控制系统

将自动控制方法应用于工程建筑智能化系统中,采用I/O数据模拟信号交换信息。本文提出智能建筑方案,设计采用以I/O数据模拟信号传输和控制实现的智能化管理系统。