BREAKAGE MECHANISM OF TUNGSTEN BASED ALLOY BLOCK FOR ELECTRO-HEAT UPSETTING

The breakage mechanism of W-Ni-Fe alloy in the process of electro-heat upsetting studied both theoretically and experimetnally, and also the behaviors of crack formation and propagation were analysed. Alloy suffers from corrosion and thermal-mechanical fatigue mutual function. Simultaneously, the practical ways to improve the anvil life was discussed.     

浅谈信息技术与数学学科的整合

信息技术的发展,使人们的学习和交流打破了过去的时空界限,为人类能力的提高和发挥作用带来了新的空间。通过信息技术与数学学科的整合,让数学更贴近生活,突破教学重点难点,提高了学生的发散性思维能力,让我们看到信息技术在教学中的重要性。     

Laminated paper-based analytical devices (LPAD): fabrication, characterization, and assays

Paper-based microfluidic devices have recently garnered an increasing interest in the literature. The majority of these devices were produced by patterning hydrophobic zones in hydrophilic paper via photoresist or wax. Others were created by cutting paper using a laser. Here, we present a fabrication method for producing devices by simple craft-cutting and lamination, in a way similar to making an identification (ID) card. The method employs a digital craft cutter and roll laminator to produce laminated paper-based analytical devices (LPAD). Lamination with a plastic backing provides the mechanical strength for a paper device. The approach of using a craft cutter and laminator makes it possible to rapid-prototype LPAD with no more difficulty than producing a typical ID card, at very low cost. Devices constructed using this method have been exploited for simultaneous detection of bovine serum albumin (BSA) and glucose in synthetic urine with colorimetric assays. Both BSA and glucose are detectable at clinically relevant concentrations, with the detection limit at 2.5 μM for BSA and 0.5 mM for glucose.     

机械加工过程中的振动及控制方法研究

机械加工中的振动对于加工质量和生产效率都有很大影响,须采取措施控制振动.本文首先简要介绍了机械加工过程中的振动问题的危害,然后详细介绍了消除或减弱机械加工过程中的振动的具体方法和策略.     

WPS特色插件吉祥三宝

WPS功能已经够全了,但是大家的需求是无止境的,一些特殊任务就交给WPS的插件来处理吧,通过插件让自己的山PS与众不同。     

BT能否被洗白？

2009年底,广电总局对于BT网站的一纸封杀令．让P2P分享领域网站迅速站在了风口浪尖上。当退潮之后,到底谁是得利者呢？盗版光碟经销商？视频网站？本期“新视界“栏目的深度报道文章《后BT时代6大猜想》帮大家分析了未来,但究竟会怎样谁也无法断言。     

谁说海底难捞针网上找图片、音乐、电影的15招

工作之余,想找一些美景图片饱饱眼福,找一些悦耳动听的歌曲大饱耳福,周末还想找一些大片彻底放松一把。对于多数朋友来说,都会选择Google、百度的常规搜索功能来搜索,但结果往往是收效甚微,要么就是没找到自己想要的,要么就是找到的资源链接失效了。其实,网上找图片、音乐、电影是有技巧的,那些高手们一般都是一找一个准,毫不浪费时间和精力,如果你掌握了这些技巧,一样可以快速直达目标。