星型聚合物中间体环硅氧烷核的合成研究

以甲基二氯硅烷、四甲基四乙烯基环四硅氧烷(DVi4)为原料,采用硅氢加成反应合成了星型聚合物的中问体环硅氧烷核,并用红外光谱和核磁共振谱进行了表征.反应的最佳条件是:采用预先活化、反应温度72℃、催化荆与DVi4的量之比为1.0×10-4,反应转化率可达95%,且选择性很好,产物主要为β-加成产物.     

有限元仿真分析中的结构周期差异探讨

针对有限元仿真分析中结构自振周期减小的问题，讨论了几种主要的影响因素，并借用商品化设计软件TBSA，ETABS 和有限元分析软件ANSYS，通过对一个简单结构的多次计算，比较了这些因素的影响大小。     

Optimal Hybrid Control for Structures

A new method for integrated design of passive and active elements is presented. Rather than the existing qualitative selection of parameters for passive elements, a quantitative approach is proposed that finds optimal active and passive parameters with respect to an H₂/H_∞ performance requirement. This new approach automatically yields passive designs when the given performance limits are high enough and active (hybrid) designs when the given performance constraints are stringent. Furthermore, our algorithm finds the special performance requirement (the peak of the frequency response) that cannot be satisfied by any passive design. Hence this article shows how to determine when control is required rather than assuming a priori that it is or is not required. A simple design method given herein yields either passive, active, or hybrid designs depending only on the level of the performance constraints that are specified in the statement of the problem.     

Disposal of Waste Plastics With Traditional Coking Process

A new technology for treating waste plastics （WP） by traditional coking process was introduced. With a thermo-balance and a 10 g atmospheric fixed bed reactor, the thermo-gravimetric behavior and product were studied during co-coking of WP with blended coal. And then, using a coke-oven with capacity of 200 kg, the characteristics of products were assessed. The results showed that there is an overlapping temperature range （200-550℃ ） of decomposition between WP and blended coal, and the pyrolysis synergism index η and synergism strength β proposed could evaluate the synergism between them. 1% of added WP results in the maximum synergism in all series experiments. The increase of added WP decreases the synergism. Tar yield in co-coking is increased with the decrease of water yield for synergism. Moreover, it was also found that the quality indexes of coke, such as M10, M40, CRI and CSR, are degraded with the increase of WP until 4%, though the quality of tar and gas is optimized for WP addition.     

Synthesis of Iron-Based Laves Phase Containing Praseodymium Magnetostrictive Materials

The synthesis and magnetostriction of PrxTb1-x.Fe2, PrxTb1-x Fe2BO2 and PrxTb1-x（Fe0.6Co0.4）2 alloys were investigated in this study. The addition of boron or cobalt atom in PrxTb1-xFe2 could effectively prevent the formation of non-cubic phases, and Pr concentration limit was successfully increased from 0.2 to 0.4. X-ray step scanning for the PrxTb1-xFe2BO2 and PrxTb1-x（Fe0.6Co0.4）2 alloys showed that PrFe2 possessed a large spontaneous magnetostriction λ1111.     

霍尼韦尔TPS系统的概况及安全策略

介绍TPS系统结构,TPS系统在我厂的使用过程中遇到的问题以及解决办法,TPS系统安全策略的实施。     

下扬子北缘前陆盆地构造变形样式

下扬子北缘前陆盆地经历了印支、燕山、喜山等多期构造改造,构造环境经开裂扩张—碰撞拼合—拉伸断陷等多次转换,最终形成了上部拉伸、中部逆冲推覆、下部拆离滑脱的"三层楼阁"式分层构造变形组合的构造几何学模式.其构造变形主要受中三叠世扬子地块与华北地块的陆—陆碰撞造山作用控制,具有横向上强弱分带、垂向上形变分层的特征.可划分为伸展变形、冲断褶皱变形、拆离滑脱变形等3种构造变形样式.      

微粒混凝土受压应力应变全曲线试验研究

采用一种特制的刚性辅助装置,进行了微粒混凝土和普通混凝土的应力应变全曲线试验研究,得到一系列应力应变曲线。对微粒混凝土和普通混凝土的立方体抗压强度与棱柱体抗压强度的关系、棱柱体抗压强度与峰值应力所对应应变的关系及棱柱体抗压强度与初始弹性模量的关系进行了分析,虽然微粒混凝土的力学性能与普通混凝土的力学性能存在一定的差别,但主要力学性能还是相似的,在模型试验中微粒混凝土是可以用来代替普通混凝土进行结构试验的。同时也验证了刚性辅助装置在测量微粒混凝土和普通混凝土的应力应变全曲线时的有效性。     

固铍处理几种工艺方法讨论

近年来,贵溪冶炼厂贫化电炉渣含铜呈逐年上升趋势,究其原因较多,其中在贫化电炉中处理固铍是主要原因之一.文章主要是时贵溪冶炼厂固铍处理生产现状进行介绍,对贵冶固铍处理的几种可能方法进行分析和讨论,并进行相应的技术经济比较.