内蒙古海拉尔盆地演化研究

海拉尔盆地的形成和演化可分为断陷和坳陷两个时期。断陷期又可分为5个阶段:孕育阶段、强烈拉张阶段、快速沉降阶段、稳定拉张阶段和萎缩阶段。坳陷期拉张减弱,有扭性作用,盆地变浅。因此,海拉尔盆地为一“断陷-坳陷”转化型盆地。     

宝塔罩型塔板的研究

宝塔罩型塔板是在新型垂直筛板(New VST)的基础上,提出的一种具有结构简单、生产能力大、工作范围宽、压降低和传质效率高的塔板。本文详述了该塔板的结构,以及流体力学性能和传质性能的实验结果。     

细长,薄壁锥管成形模设计

介绍了一种缩口、胀形复合成形模,成形模具设计时充分考虑了成形的可能性和加工过程的经济性.     

Merkle Tree Digital Signature and Trusted Computing Platform

0 IntroductionDigital signatureis a key technique to provide datainteg-rity andsource authenticationcapabilities to enhance da-ta trustworthiness in trusted computing platform. Most cur-rent digital signature schemes are based on complex mathe-matical problems , such as integer factoring, discrete log-arithm,and discrete logarithm on elliptic curves . The hard-ness of these underlying mathematical problems is really un-certain at present . Merkle treeis a method used for authenti-cation and di…     

青海皮燕麦农家品种的同工酶分析

用聚丙烯酰胺凝胶电泳法分析了３４种青海皮燕麦农家品种的过氧化物酶同工酶，酯酶同工酶，结果显示，３４份皮燕农家品种的过氧化物酶同工酶共有五条酶带１种酶谱类型，酯酶同工酶共有１３条酶带，５种谱带类型，３４份品种大多是Ｉ型，Ｖ型只占３％。     

辣椒红色素提取工艺的研究

通过辣椒红色素提取过程的研究，确认色素提取过程为内扩散控制，利用管式提取法提取优于单级多次提取法，为工业生产过程的改进提供了依据。     

典型盐岩力学特性分析

通过单轴、三轴压缩实验及劈裂等实验研究了湖北云应、江苏淮安和河南平顶山3 个地区层状盐矿岩样的短期力学特性,并对不同地区及不同深度地层的纯盐岩力学特性进行比较分析。结果表明：（1）3 地区中单轴抗压强度和弹性模量最大的岩样为泥岩和含泥岩的盐岩,而其泊松比却是最小的,证明了泥岩变形性能差的特性。含有不同杂质的盐岩其抗压强度和弹性模量有所增加,其泊松比对杂质的变化不是太敏感。纯盐岩抗压强度、弹性模量和泊松比随地层深度的增加而增大,取自较浅地层的岩样单轴实验有明显的压密阶段。（2）不同地区的岩样都有随围压的增大峰值强度相应增大的规律。纯盐岩的内摩擦角基本都大于其他岩样的值,而黏聚力则都小于其他岩样的值。反映了纯盐岩晶体颗粒大,含杂质少的特点。（3）不同地区的纯盐岩相对于其他岩样的抗拉强度最小。     

Platinum nanoparticles from the hydrosilylation reaction: capping agents, physical characterizations, and electrochemical properties

Platinum nanoparticles synthesized by a unique synthetic approach, the hydrosilylation reaction, have been reported previously. However, the interaction between the underlying platinum nanosupport and the capping agents is poorly understood. Here we continue to investigate Pt nanoparticles from the hydrosilylation reaction to address this issue and present the characterization results of nuclear magnetic resonance, X-ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy. These characterization results conclude that two different modes of binding of the aliphatic capping agents with the platinum surface are attributed to the formation of Pt-C bonds under excess olefin concentration and Pt-Si bonds under excess hydrosilane concentration. Morphology and UV-vis spectra of the platinum nanoparticles were explored by transmission electron microscopy, X-ray diffraction, and UV-vis spectroscopy. Moreover, electrochemical properties of the platinum nanoparticles were also studied by cyclic voltammetry and chronoamperometry.     

"金属的开发与利用"的教学设计

在实施化学新课程的今天,教学设计如何改变传统教育理念,依据化学课程标准创造性地使用教材和可利用的教学资源,恰当地选择教学方式和方法,有效提高学生科学素养已成为当前化学教育最有价值的问题.下面是笔者在2007年4月全国新课程培训中做公开教学的课堂教学设计,愿与各位同仁交流探讨.