有环的

For several years, large-scale steam turbo generator's rotor collector rings made in our country frequently suffer burning loss problems. Through the massive scene evidence collection and the research, the main reasons of the accident are comprehensively studied and induced. According to the reasons, pertinent measures are found, and have a good effect on preventing the burning loss of generator's collector ring and electric brush.

针对几年来国产大型汽轮发电机频繁发生转子集电环烧损问题进行了大量的现场取证和研究，对事故的主要原因进行了综合分析和归纳，在得出的结论中采取了有针对性的措施后，对预防发电机集电环及电刷烧损事故的发生起到了良好的效果。

Results: MC of tryptase immunoreactivity contain abundant F-actin ring that region of cytomembrane endothecium form a barrier of blocking tryptase liberation. Copious tryptase temporarily was stored in secretory vacuole, and small amounts tryptase was released from secretory vacuole for depolymerize of F-actin ring in cell.

结果：类胰蛋白酶免疫反应性的肥大细胞内含有丰富的丝状肌动蛋白环，在质膜内层区域形成阻碍类胰蛋白酶释放的屏障；大量的类胰蛋白酶暂存于分泌泡中，少量的类胰蛋白酶因细胞内丝状肌动蛋白环的解聚使之从分泌泡中释放。

Results: MC of tryptase immunoreactivity MC(subscript T contain abundant F-actin ring that region of cytomembrane endothecium form a barrier of blocking tryptase liberation. Copious tryptase was temporarily stored in secretory vacuole, and small amounts of tryptase was released from secretory vacuole for depolymerize of F-actin ring in cell.

结果：类胰蛋白酶免疫反应性的肥大细胞内含有丰富的丝状肌动蛋白环，在质膜内层区域形成阻碍类胰蛋白酶释放的屏障；大量的类胰蛋白酶暂存于分泌泡中，少量的类胰蛋白酶因细胞内丝状肌动蛋白环的解聚使之从分泌泡中释放。

All signals of of the resulting closed-loop system are globally bounded, and the states of the resulting closed-loop system can converge to a residual set.

得到的闭环系统的所有信号是全局有界的，并且闭环系统的轨线收敛到状态空间的一个残集。

Based on this core reaction, two significant libraries of isoxazole and triazole substituted methane derivatives and triazole substituted triazine derivatives were synthesized concisely from the inexpensive and readily obtainable small molecular starting materials which had been used in previous two chapters mostly.

以此为核心，以价廉易得的小分子原料通过数步反应，分别合成了异噁唑、三氮唑杂环取代的甲烷衍生物和三嗪联三氮唑杂环衍生物这两个比较有意义的小分子化合物库，达到了分子的多样化。

A substantial rubber pad was fitted to protect the pilot from injury in the event of a rough landing, the range/base setting was modified to two similar knurled rings with their own scale and indicator, and the lamp changing was also made easier.

安装一个橡胶垫，在万一发生硬着陆的时候保护飞行员免遭伤害。射程和基准设置修改为两个相似的压调整圆环，两个环有各自的刻度和指示器。灯泡更换也更容易了。

To optimize the reaction condition for the purpose of target compounds synthesis, the advance of 1,3-dipolar cycloaddition and click chemistry is reviewed. The conditions of the reaction between azides or nitrile oxides and terminal alkynes were optimized experimentally and the best operation condition was established.

以此为核心，以价廉易得的小分子原料通过数步反应，分别合成了异噁唑、三氮唑杂环取代(来源：29ABceC论文网www.abclunwen.com)的甲烷衍生物和三嗪联三氮唑杂环衍生物这两个比较有意义的小分子化合物库，达到了分子的多样化。

Study on the ring-opening polymerization mechanism of epoxide would have instructional bearing for producing high quality polyethers.

研究环氧化物的开环聚合机理对于生产高性能的聚醚有重要的指导意义。

On the basis of our preceding work. the asymmetric ring-opening reaction of epoxides using dithiophosphorus acids as nucleophiles was further studied.

在本课题组已有工作的基础上，我们对磷试剂参与的环氧化合物的不对称开环反应进行了进一步的研究。

Chiral epoxides produced by alkene epoxidation are extremely useful building blocks for asymmetric synthesis.

碳碳双键经不对称环氧化得到的光学活性环氧化物是一类重要的手性元，可以合成许多有价值的手性化合物。

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