聚合体

The present invention provides a multinuclear half metallocene compound in which two or more of transition metals of groups 3 to 10 on periodic table are connected through bridge ligand simultaneously containing Pi-ligand cycloalkandienyl group and Alpha-ligand functional group and its preparation, and a process for preparing styrene polymer using the compound as a catalyst.

本发明提供了一种其中的两个或更多元素周期表第3-10族过渡金属通过同时包含π-配体环烷基二烯基团和α-配体功能基团的桥配体连接的多核半金属茂络合化合物及其制备方法，及使用本化合物为催化剂的苯乙烯聚合体的制备工艺。

By GC-MS analysis, the liquefied products contained oligomers of polyhydric alcohols, carboxylic acids and their esters because of oxidation and esterification of polyhydric alcohols and the decomposed cornstalk components.

GC-MS分析表明，液化产物中主要含有多元醇的低聚合体，以及多元醇和玉米秸秆降解产物的氧化和酯化反应产生的羧酸及其酯。

The uniphase C with W/≤0.3 can be synthesized without being preheated. When W/ is higher than 0.3, the sample expansion increases with the increase of W content, the reaction between W and C is incomplete, the combustion products consist of W〓C, WC, TiC, C, and unreacted W. Preheating mixtures can accelerate the completion of the reaction among Ti, W, and C. The uniphase C with W/=0.4 can be synthesized by SHS at preheat temperature of 600℃. There are two kinds of powders with size of 2-4μm and size less than 1μm in the combustion products.

通过燃烧前沿激冷淬熄试验及产物形貌特征（燃烧块断面组织和产物多晶聚合体颗粒）分析，创新性地提出了两种体系的自蔓延高温反应机制。1熔化—溶解—析出机制：当燃烧温度较高时，燃烧前沿Ti粉熔化，W和C溶解于熔融Ti里，而后C从熔融里析出。2扩散—固溶机制：当燃烧温度不足以使燃烧前沿Ti粉熔化时，通过C的扩散先形成TiC层，其后C沿着热应力导致的TiC层裂纹继续扩散，与固态Ti核反应生成TiC；同时，C扩散至W颗粒，形成W〓C，而后通过C的继续扩散W〓C转变成WC；与此同时，WC固溶至TiC里，形成C固溶体。

In order to evaluate YW243, these new lines were analyzed and compared the resistance, quality, yield with YW243 and the backcrossed parents.

对这些新品系抗性、品质、丰产性进行鉴定，并与YW243、回交亲本进行比较分析，以评价多基因聚合体YW243的利用价值和方法。

The polymeric scheme is put forward to reduce the complexity of system management and support the participation of large - scale simulation federates.

为降低StarLink＋系统管理的复杂性，支持大规模仿真盟员的加入，论文提出了基于&聚合体&的联盟管理服务的实现思想，并基于该方法具体地描述了各个服务的实现算法。

Bio polymers are microbially produced polymers used to modify the flow characteristics of liquids and to serve as gelling agents.

生物聚合体是微生物产生的聚合物被用来改变液体的流动性质和作为胶凝剂。

Its comprehensive coverage includes: mechanical and nondestructive testing equipment and methods for ceramic and polymer matrix composites used in the construction of aircraft and aircraft engines; rockets and spacecraft; carbon-carbon, CFRP, GFRP, sandwiches, laminates, honeycombs etc.

它的全面覆盖面包括：用于航空器和飞机发动机结构中陶瓷和聚合体基复合材料的机械与无损探伤设备和方法；火箭和航天器；碳-碳、CFRP、GFRP、夹层、分层、蜂窝等。

After polished with SiC paper and sandblasted with 60^# Al2O3 particles, all specimens of titanium discs were divided into three groups.

目的：研究用微孤氧化表面处理提高钛与瓷聚合体粘结强度的可行陛，并对结合初理进行初步探讨。

The polymer has a history of safe use in humans (in biodegradable sutures, for example).

此聚合体在人类历史上曾安全使用过，比如能生物降解的医学缝合。

Because dispersed state of bentonite in the water was changed by ammonium molybdate, its adsorptive capability and ionic exchange ability were improved, and its color removal rate from the wastewater of basic blue dye was 96.53%.

由于钼酸铵聚合体的引入改变了膨润土在水中的分散状态，增强了其对污染物的吸附和离子交换能力，处理后印染废水的脱色率可达96.53%。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐