FlashFXP的挑战者——UltraFXP

提起FTP客户端软件，大家可能会自然而然地想起CuteFTP、LeapFTP或FlashFXP，可我今天要介绍给大家的并不是这些老牌劲旅，而是一款功能足以挑战各老牌劲旅的免费软件——UltraFXP。     

“流氓教父”OR“安全卫士”？

“流氓软件教父”周鸿祎推出“360安全软件”是弃恶从良还是别有所图?不久前,奇虎与卡巴斯基正式牵手,“流氓软件教父”周鸿祎向流氓软件正式宣战。3721荣幸地被教父评为首恶,用“360安全卫士”软件将3721彻底清除将是周鸿祎用来向流氓软件宣战、献给用户的最好祭礼!本来,“360     

CuZn合金中贝氏体切变生长的原位观察

ＣｕＺｎ合金中贝氏体切变生长的原位观察杨延清，孟祥康，贾虎生，康沫狂（西北工业大学，西安７１００７２）关于贝氏体相变机制仍有很大分歧，主要有切变学派和扩散控制的台阶机制学派。由于贝氏体是合金中一类中温相变产物，用高温电镜对其进行原位观察显得十分重要，...     

进口与国产高强度耐磨钢板的组织及力学性能

观察了进口、国产高强度耐磨钢板的组织，测试了它们的力学性能及耐磨性能。结果表明，国产准贝氏体钢耐磨板具有良好的强韧性配合，耐磨性能超过进口耐磨钢板，能够替代进口板作为高强度耐磨板。     

狂PK的狂想曲

时隔前一次写“稀饭第九页”已经半年多了,我搬到了离单位较近的地方,已经不用像上次写的那样将刷牙和早饭这两项工作同时进行了,上班只要步行10分钟(假想图:需要坐3小时公车才能到单位的柳絮飞作崇拜状)。时间充裕了许多后,让我能有时间考虑许多问题,比如理想。以前我曾有很多     

活塞裙部润滑分析(上)

<正> 1 前言长期以来,活塞组件一直被认为是发动机机械摩擦损失的主要来源,而且又是表示其可靠性和耐久性的要害润滑界面。目前,已有几种试验方法,用于研究实际工作中的发动机活塞组件的摩擦情况。但是,目前还不可能在这些试验中分离出裙部的摩擦情     

Training for an agricultural discrimination task

Skeleton weed, centaurea juncea, is a declared weed in Western Australia because it competes with grain crops for nutrients and moisture. When it is found during harvesting, mechanised teams search and eradicate it. In an earlier report of field trials (Hartley et al, 1989) it was reported that search teams' detection rate was poor and since search teams had usually never seen skeleton weeds, visual discrimination learning was to be expected and observed during searches. The present study investigated the nature of this discrimination learning in a laboratory by developing a training programme of colour photographic slides of weeds in stubble. Subjects receiving specific training with feedback on their performance compared with those receiving pseudo-training showed a significant improvement in detections. Subsequently the benefit of the programme was validated in a field trial.     

Ergonomics in sickle operation

Sickle operation in harvesting has been analysed with reference to design features of nine different types of sickles, and field and laboratory based investigations on biomechanical stresses and physiological valuation on six farmers. It has been indicated that the blade geometry contributes significantly to human performance and there is ample scope for further design optimisation. The suggested modifications are: (i) sickle weight - 200 g; (ii) total length of sickle - 33 cm; (iii) handle length - 11 cm; (iv) handle diameter - 3 c cm; (v) radius of blade curvature - 15 cm; (vi) blade concavity - 5 cm; (vii) serrated sickle: tooth pitch - 0.20 cm and tooth angle - 60 degrees; (viii) ratio of the length of cutting surface to chord length - 1.20.     

准贝氏体铸钢正火热处理工艺的研究

研究了准贝氏体铸钢不同奥氏体温度正火对其组织与力学性能的影响 ,结果表明 ,随奥氏体化温度的提高 ,准贝氏体铸钢的强韧性改善 ,在 10 4 0℃正火 ,准贝氏体铸钢具有最佳强韧性配合。分析了高温奥氏体化正火强韧性提高的原因。     

新型系列准贝氏体钢

介绍了我们多年的研究成果－－新型系列准贝氏体钢，该系列钢具有独特的组织和性能，以及广阔的应用前景。