利用维特比算法解调GMSK信号

为了扩大高斯最小频移键控(GMSK)技术的应用范围，介绍了二进制GMSK信号带宽占用率、数据预编码方案和利用维特比算法相干解调二进制GMSK信号的调制解调方法，给出了不同BT乘积情况下解析功率谱密度和模拟误码率结果，定量分析了邻信道干扰结果。结果说明利用维特比算法解调GMSX信号可以在满足接收机性能的基础上简化设计。     

则武直接甲醇燃料电池 全球最高性能！

日本则武10月6日宣布,正在开发中的采用“有机无机混合电解质膜”的直接甲醇燃料电池(DMFC)的性能达到了世界最高水平。有关详细情况将于10月8～13日在日本横滨开幕的“国际材料研究联合会”上发表。 截至目前,则武一直在从事燃料直接使用液态甲醇的DMFC电解质膜的开发,而不是气体改质器。由于DMFC具有无需燃料改质器、可在低温下工作等优点,易于实现小型化设计,因此在便携电源开发领域颇受关注。     

浅谈建筑施工现场火灾隐患及防范对策

建筑工地是一个多工种密集型立体交叉混合作业的施工场地,尤其在工程施工的高峰期间,明火作业多,作业工种多,施工方法又各有不同,因而就出现不同的火灾隐患,如果疏于管理,极容易引发工地火灾.     

培育积极机构投资者:深化国有企业改革的新思路

随着《关于深化国有企业改革的指导意见》的出台,国有企业改革已进入全面深化与推广阶段.在顶层设计上,以管资本完善国有资产管理体制和发展混合所有制经济是新一轮国企改革的两大亮点.然而,从实际操作层面来看,真正落实两大改革亮点则面临着混改资金不足、资本运作能力不足和混改信心不足的难点.积极机构投资者在国企改革中扮演着长期资金供给者、资本运作合作者、牵线搭桥“红娘”和公司治理促进者的重要角色.扩容养老与保险资金,壮大本土机构投资者规模,优化机构投资者结构,免征股息红利税,鼓励国有企业现金分红,从而充分发挥积极机构投资者在国企改革中的重要作用,进而推动国有企业的深化改革.     

WOMBAT A tool for mixed model analyses in quantitative genetics by restricted maximum likelihood （REML）

WOMBAT is a software package for quantitative genetic analyses of continuous traits, fitting a linear, mixed model; estimates of covariance components and the resulting genetic parameters are obtained by restricted maximum likelihood. A wide range of models, comprising numerous traits, multiple fixed and random effects, selected genetic covariance structures, random regression models and reduced rank estimation are accommodated. WOMBAT employs up-to-date numerical and computational methods. Together with the use of efficient compilers, this generates fast executable programs, suitable for large scale analyses. Use of WOMBAT is illustrated for a bivariate analysis. The package consists of the executable program, available for LINUX and WINDOWS environments, manual and a set of worked example, and can be downloaded free of charge from http://agbu. une.edu.au/~kmeyer/wombat.html     

Erich混料机搅拌系统国产化改造

Erich混料机搅拌系统国产化改造,利用了混料机发生故障停机的维修时间,对搅拌系统部件进行测绘的同时,借鉴多年使用各种混料机的经验,对系统进行了全新设计,延长了搅拌系统的寿命,降低了成本,满足了池炉工艺要求,为维修Erich混料机提供了经验.     

让汽车飞起来

<正>未来陆上交通工具在动力设计方面会完全采用低能耗、无污染的全新技术,被称为是"未来汽车"的电动汽车分为3种:纯电动汽车、燃料电池电动汽车和混合动力电动汽车。     

浅谈Photoshop抠图

Photoshop是Adobe公司出品、基于位图处理的图像合成软件,提供了多种抠图方法,如利用魔棒工具、背景橡皮擦、抽出、混合颜色带等。本文主要讨论了各抠图方法的特点及其适用范围。     

2010年全国理综(1)化学试题答案的几处不"标准"

2010年全国理综(1)化学卷"标准答案"公布后,本人对此作了比较细致深人的研究.发现非选择题部分有两处答案不够"标准",现分析如下:     

Experimental performance of moderate and high temperature heat pump charged with refrigerant mixture BY-3

Theoretical and experimental analysis of a new refrigerant mixture BY-3 was conducted based on a single-stage vapor compression refrigeration system. The water-water heat pump system used BY-3 to produce hot water when the low temperature was 20 ℃. The following results were obtained: the highest temperature at the condenser outlet reached about 85 ℃; when the difference between the water temperatures at the condenser outlet and the evaporator inlet was less than 40 ℃, the coefficient of performance (COP) was larger than 4; when the difference reached 55 ℃, the COP still kept 3; the discharge temperature of BY-3 was lower than 100 ℃, and the refrigerant vapor pressure kept lower than 1.8 MPa. When the water temperature at the condenser outlet reached over 85 ℃, nearly a 5 ℃ superheating temperature was maintained.