年龄的秘密“节点”

我们的身体就像一个链条,随着年龄的增长,链条上某些环节就会发生变化,我们就变得不再是“我们”……     

气候变暖令美国家公园“变色”

迅速变暖的气候使得阿拉斯加的国家公同正发生变化：永久冻土融化引发泥石流,阻住要道;冻土上冒出的高高的灌木丛遮挡了四周景色,冰川也融化失色,并且带来水灾的危险。     

知识产权经济正逢其时 传统经济悄然发生变化

案例导读：李官奇,河南滑县农民发明家,第八届中国专利金奖获得者,2004年度大河财经人物,河南省首届“十大非职务发明创业之星”。先后以其十多项发明专利和“李官奇”、“天绒”、“沅秀”商标等知识产权为智力资本,以技术入股的方式,合资兴建了数家生产企业。在这些合资项目中,     

春季健康养生之道

春季是生发的季节，天气由寒转暖，自然界各种生物萌生发育，弃故从新。中医认为，受四季之气影响，人体的气血阴阳会随之发生变化。春季阳气始生，气血渐趋于表，毛孔初开，血气稍减，所以有“困”的感觉。夏季阳气流溢，气血通达于表，毛孔开，汗大泄，所以常有“昏昏欲睡”的感觉。而秋季阳气始衰，阴气始生，气血渐趋于里，但充而不实，所以仍有“乏”的感觉。     

A red water occurrence in drinking water distribution systems caused by changes in water source in Beijing,China: mechanism analysis and control measures

A red water phenomenon occurred in several communities few days after the change of water source in Beijing, China in 2008. In this study, the origin of this problem, the mechanism of iron release and various control measures were investigated. The results indicated that a significant increase in sulphate concentration as a result of the new water source was the cause of the red water phenomenon. The mechanism of iron release was found that the high-concentration sulphate in the new water source disrupted the stable shell of scale on the inner pipe and led to the release of iron compounds. Experiments showed that the iron release rate in the new source water within pipe section was over 11-fold higher than that occurring within the local source water. The recovery of tap water quality lasted several months despite ameliora- tive measures being implemented, including adding phosphate, reducing the overall proportion of the new water source, elevating the pH and alkalinity, and utilizing free chlorine as a disinfectant instead of chloramine. Adding phosphate was more effective and more practical than the other measures. The iron release rate was decreased after the addition of 1.5 mg. L-1 orthophosphate- P, tripolyphosphate-P and hexametaphosphate-P by 68%, 83% and 87%, respectively. Elevating the pH and alkalinity also reduced the iron release rate by 50%. However, the iron release rate did not decreased after replacing chloramine by 0.5-0.8 mg. L-1 of free chlorine as disinfectant.     

政策减排篇:小火电比大火电更赚钱的困局

在能耗大省的广东,电会卖不出去么?事实上,这的确是广东境内所有的电厂在用电低谷时都不得不面临的一个问题.     

为企业安全管理服务

作为中国石化特大型炼油、化工生产企业，北京燕山石化公司的生产过程客观上存在易燃、易爆、有毒、有害、腐蚀性强等许多潜在危险，一旦操作条件发生变化、工艺受到干扰、产生异常，或因人为因素等原因造成误操作，各种原材料、辅助材料、中间产品、成品的易燃易爆性，高温操作、高压运行和其他因素带来的危险性，就可能酿成火灾爆炸、中毒窒息等事故。     

信息安全从花瓶到不可或缺的发展历程

从单机时代到互联网时代，由于对安全问题的漠视和在投入方面的“吝啬”，许多用户都曾付出了沉重的代价，因安全问题造成的经济损失难以估量。因此，人们对网络安全的认识终于开始发生变化。     

企业员工五个安全观

<正>企业的员工应建立的五个安全观:⒈安全就是幸福的观念随着社会的进步,人们生活水平和生活质量的提高,人们对于幸福的理解和要求也在发生变化,然而,无论如何演变,人们幸福的基础是完整的生命和健康的体魄,这一点是不能怀疑的。就个人来说,只有有了完整的生命和健康的体魄,才能够去从事创造社会价     

杨学山：互联网产业商业模式正在发生变化

由计世传媒集团和计世网联合主办的“2011年中国IT两会”12月1日在成都开幕。工业和信息化部副部长杨学山出席了会议,并就中国当前和未来一个阶段推进信息化的想法谈三点意见：要求整个信息化产业要把握趋势,明确方向;把握需求,明确目标;把握实际,寻找路径。