WinSock控件在网络编程中的应用

WinSock控件是Windows应用程序和TCP/IP之间的一个接口控件。借助于WinSock控件可以有效地对网络进行编程。在论述了WinSock控件的原理及其特点的同时,重点给出了在VB下开发基于WinSock控件的网络通信程序及邮件处理程序的方法。     

关于无理数的稠密性

文章给出无理数的稠密性的一个初等证明.     

La Parte Chusca of a Pedagogical Here and Now: Oaxacan Teachers’ Heteroglossic Joking About State Repression and Educational Reform

Faced with repression and reform, humor has become tactical for public school teachers in Oaxaca, Mexico, engaged in a decades-old movement that after 2006 involved intensified street- and school-based pedagogies. This piece explores how humor adds to a political project via mocking names, images, and dictates of elite leaders to bring a here and now to what is taken as inaccessible in the teachers’ political lives. Humor forms part of an (e)sc(h)atology in which critical practices are part eschatological, a call for definite transformation, and part scatological, embodied vulgarity. La parte chusca (the funny part), its (e)sc(h)atological contribution, angles toward critical literacies in Oaxaca and beyond.     

Cu-ZnO/Al2O3催化仲丁醇制备甲乙酮

用Cu-ZnO/Al2O3催化仲丁醇制备甲乙酮。研究了催化剂的焙烧温度和焙烧时间、仲丁醇脱氢反应的温度和压力以及仲丁醇的流量对仲丁醇转化率和甲乙酮选择性的影响。结果表明,催化剂的焙烧温度为300-400℃,焙烧时间为6h,脱氢反应的温度为300℃,压力为0.2Mpa,仲丁醇的流量为140mL/h时,仲丁醇的转化率和甲乙酮的选择性较好。     

Hydrogenation properties of mechanically milled Mg2Nio.8Cr0.2-CoO/Al2O3 composites

Mg2Ni0.8Cr0.2-x wt.% CoO/Al2O3 (x=0.5, 1, 2 and 3) composites were prepared by mechanically milling sintered Mg2Ni0.8Cr0.2 alloy and CoO/Al2O3 compound for 45 h. The addition of CoO/Al2O3 compound resulted in the good kinetics properties of hydriding/dehydriding reaction of the composites. The composite with 1.0 wt.% CoO/Al2O3 catalyst could reach the maximum hydrogen absorption capacity (2.9 wt.%) within 5 min at 393 K under H2 pressure of 4 MPa, and can desorb rapidly at 493 K. The decomposition and synthesis of hydrogen molecule on Mg2Ni0.8Cr0.2 alloy surface was promoted by addition of CoO/Al2O3 catalyst. In addition, the formation of metallic Ni particles, strain and defects during the ball milling process also resulted in the improved hydrogenation performance of Mg2Ni-based alloys.     

关于指数Diophantine方程a~x+b~y=c~z的一个猜想

设r是大于1的奇数,m是偶数,U_r和V_r是适合的整数,证明了:当r=3(mod4),m=2(mod4),m>r/Ⅱ且c是素数方幂时,方程口。a~x+b~y=c~x仅有正整数解(x,y,z)一(2,2,r).     

结合专业特色应用现代教育技术服务于中小学教学

现代教育技术的应用,深刻影响高中小学各科教学.传统的教学模式必须与现代教育技术进行整合,才能适应新课程教学改革的需要.充分发挥教育技术专业人才的主导作用,担当教育技术现代化的排头兵.     

实时多媒体数据传输的研究及实现

本文主要进行RTP／RTCP与TCP协议的比较，着重分析RTP／RTCP协议对分组网上视频业务Qos的保证。在IP电话的实现中编码后的数据流采用RTP／RTCP协议来打包传送。结果表明，开发出的软件实时性好。     

对自然数9几个特殊运算性质的探讨

在人类历史,尤其是中国的历史上,自然数9被赋予了许多神秘的内涵。该文从自然数9与其它自然数运算的结果出发作进一步分析,推导出有关自然数9的三个定理及其五个推论,深入探讨9在四则运算中体现出的特殊性质,并对这些性质进行了初步的应用。     

8253定时/计数器方式3计数过程的实验研究

对于我系选用教材和部分参考资料关于8253定时/计数器在方式3的计数过程中表述中所存在的矛盾之处,基于武汉众友电子科技有限公司的接口实验台,提出了一个探究8253计数过程的实验方案。通过分析实验结果,指出了正确的计数过程。