数字微波设备中的帧复接方式

本文主要介绍数字微波帧复接概念、种类、构成及应用，并对异步复接中的正码速调整进行了原理性分析。     

提高HPb59-1铅黄铜塑性的热处理工艺

本文介绍了提高HPb59-1黄铜塑性的热处理工艺的特点，多年在生产上的实际应用表明该工艺能有效的提高HPb-1黄铜的塑性，同时，本文探讨了该热处理工艺对HPb59-1黄铜的增塑机理。     

小家电维修系列文章之二十五 电暖器原理和故障维修(下)

本文继续以华生NP180-20型挂壁式暖风机为例讲解电暖器的故障维修方法和技巧。对维修其它牌号的暖风机和取暖器同样也有一定的参考价值。电暖器的常见故障有:开机无反应、开机后风机不转但机子会发热、不发热、只有一组(半热)发热组件能工作、发热量不足、电源开关或电源指示灯     

唱片评论——贝多芬：第1-3钢琴奏鸣曲

这是历史上第1套贝多芬钢琴奏鸣曲全集，在EMI目录上也找得到，但是价格要高不少，而且没有单张独立发行，NAXOS此次的再版，除了价格大幅下调之外，在音质的转制上也提升不少，看来将会逐渐取代EMI版在市场上的地位。不过EMI在原录音制作上也是功不可没，即便是在当年的78转唱片上，只要保养得     

浅析新一代锂－离子电池充电器和电源适配器

新一代锂-离子电池的电解质、封装、尺寸、重量、能量密度及安全性能都有所改善，其充电器和电源适配器有些什么变化呢?     

关于矩阵Γα-减序

引进并讨论矩阵Гα-减序.给出了Гα-减序的一些刻划和性质.     

手机游戏

梦幻模拟战Ⅱ；圣战-上帝之子；长江7号；雷曼卡丁车     

Damage and fracture evaluation of granular composite materials by digital image correlation method

This paper presents the applications of digital image correlation technique to the mesoscopic damage and fracture study of some granular based composite materials including steelfiber reinforced concrete, sandstone and crystal-polymer composite. The deformation fields of the composite materials resulted from stress localization were obtained by the correlation computation of the surface images with loading steps and thus the related damage prediction and fracture parameters were evaluated. The correlation searching could be performed either directly based on the gray levels of the digital images or from the wavelet transform (WT) coefficients of the transform spectrum. The latter was developed by the authors and showed higher resolution and sensitivity to the singularity detection. Because the displacement components came from the rough surfaces of the composite materials without any coats of gratings or fringes of optical interferometry, both surface profiles and the deformation fields of the composites were visualized which was helpful to compare each other to analyze the damage of those heterogeneous materials. The project supported by the National Natural Science Foundation of China (10125211 and 10072002), the Scientific Committee of Yunnan Province for the Program of Steel Fiber Reinforced Concrete, and the Institute of Chemical Materials, CAEP at Mianyang     

一致u0-凹算子方程逼近解的收敛速度

证明了一致u0-凹算子A满足一定条件时,迭代列xn=Axn-1(n=1,2,…)能以很快的速度收敛于算子方程Ax=x的正解x*.