浅析股票长线投资与短线交易的兼容性

当前,中国股市正处于无效市场与弱势有效市场的交界区,适于长期投资的股票在逐渐增多,但绝大多数股票仍被进行投机炒作。鉴于以上状况,我们认为在对一支股票进行长期持有的同时,进行短期的差价操作十分适合中国绝大多数的投资者,特别是普通投资者。详细阐述了长线投资与短线交易是如何并行不悖的,以及掌握该方法需要具备的三种重要基本理念：必须坚持严格的操作纪律,务必要控制好仓位;保持良好的心理状态,不对股票爱憎分明;最多持有2至5只股票即可。     

西门子公司6RA70直流驱动器“小拖大”应用

由于中国工业起步较晚，相关自动化控制系统的产品研发也癌陧，且质量上无法与欧美国家媲美，要想实现精准的自动化控制。就不的不依赖于国外的产品。日前国内冶金行业所运用的直流调速驱动器大郝使用德国西门子的产品，所用驱动器功率越大茂本越高。鉴于此，将驱动器的输出电；克或电压进行扩大，即将功率小的驱动器改装成功率大的驱动器，即降低了成本也达到了同样的控制效果。     

中国汽油为何只要2.49美元?

美国的汽油如今售价大约是4美元每加仑,而中国的售价却是2.49美元每加仑。北京规定1吨柴油在中国的售价为700美元,而世界市场上的价格却为每吨1200美元。免遭油价上涨冲击的中国消费者将会继续更多地消费,从而将助长国际市场油价攀升。     

Pearls in Pearl River Delta

When the Pearls in Pearl River Delta （PRD） is mentioned, Hong Kong will also naturally jump to people＇s mind. It must not only due to PRD＇s proximity with Hong Kong, but also due to Hong Kong＇s special role in the development of this region. Admittedly, Hong Kong really provided strong drive for the takeoff of the PRD Economic Zone. But with the prosperity of PRD, the nearly tailored combinations and complementarity have taken shape between Hong Kong and PRD, pushing the economy in the two areas to grow far more rapidly than otherwise.     

简析LED发光源工作工作原理及其应用

随着世界能源的一次次告急,全人类的节能意识越来越增强,而节省电力资源又是重中之重.本文简要介绍分析了21世纪用以代替白炽灯泡的LED发光二极管的工作原理及特性以及其驱动器的分类等知识点.     

Tumenjiang Delta,New Drive for Chinese Economy

District of Tumenjiang, or Tumen river areais described by Japanese Takeo Touma as strategic center of ＂Japan Sea Rim Economic Zone＂ for five economic regions （Japan the Far East region of Russia, North and South Korea, and the North- east region of China）. As the typical example of international regional cooperation, the idea of Tumenjiang area devel- opment has lasted for nearly 20 years with the fluctuations of international politics.