环状的

The present invention relates to the depolymering cyclization reaction of aromatic dithio ether polymer to prepare aromatic cyclic dithio ether compound under the presence of mercapto group containing compound and alkali matter.

本发明涉及利用芳香双硫醚聚合物的解聚成环反应来制备芳香双硫醚环状化合物的方法。该方法采用芳香双硫醚聚合物在含巯基的化合物和碱性物质存在的条件下发生解聚成环反应生成双硫醚环状化合物。

Herein, we propose an efficient method to prepare the optically active spiro [4,5] decane, a key intermediate for several spirovetivanes.

我们因此提出一种有效的方法来合成具光学活性的旋环状[4，5]癸烷，作为一些旋环状化合物的关键中间产物。

The genome of infectious hepatitis B virus is a partially double stranded circular DNA, and that of replicative HBV is a covalently closed circular supercoiled DNA. The patients with chronic HBV infection manifest from non-active virus carrier state to severe active hepatitis, and 15%~25% of which will evolve decompensate cirrhosis and hepatocellular carcinoma.

感染型的乙型肝炎病毒基因组为部分双链环状DNA，复制型的HBV基因组共价闭合环状DNA慢性HBV感染的进展过程多变，从非活动性病毒携带到严重的活动性肝炎；其中约15%~25%的病人最终导致失代偿性肝硬化、肝细胞癌。

Objective To evaluate the efficacy of stapled hemorrhoidectomy in treatment of third or fourth degree hemorrhoids.Methods A total of 24 patients with prolapsed irreducible hemorrhoids were performed stapled hemorrhoidectomy.Benefits and postoperative complication were assessed.

目的 探讨经肛门吻合器痔上黏膜环状切除术的临床应用和价值方法对24例3～4期痔行经肛门吻合器痔上黏膜环状切除术，分析手术过程与术后并发症的相关性，分析术后留院时间，恢复正常工作的时间及治疗费用。

Based on optimization theories of genetic algorithms and the linear programming, a series of optimal desig...

提出了环状管网优化设计的遗传—线性规划算法，将遗传算法和线性规划有机的结合在一起，是一种有效地解决环状管网优化设计问题的新。。。

The height of central part of the round cambered surface is equal or higher than the one of ring- shaped bulge. When the horizontal top side of internal cavity of encapsulation mold is pressed down to the heat sink so as to produce a deformation, the cambered surface can not be pressed to oppress the subjacent metal line, and the ring-shaped bulge can also prevent mold-overflow.

该散热片，适用于封装制程，具有一圆形弧面板部，并且其圆形弧面板部的中央是高于或等于环状凸起的高度；如此一来，当封胶模具内模穴的水平顶面下压至散热片上而使其产生变形时，圆形弧面板部就不会压迫到下方的金属线，而环状凸起同样也可发挥防止溢胶的功能。

This is a new approach to determine optimal flow distribution of pipe segment and water source.

提出了环状管网优化设计的遗传-线性规划算法，将遗传算法和线性规划有机的结合在一起，是一种有效地解决环状管网优化设计问题的新方法。

Taking the effect of internal energy of the accreting materials into account and using the classical theory, we have shown that the occurrence of soluti...

计算还表明，在温度极大值所处半径的内面，有一迅速冷却的环状区域存在。在这一环状区域内，有可能具有某些在通常温度分布时所没有的特性。

The invention discloses an apparatus of high pressure collecting hardened concrete solution in hole which is consisted of a cylinder body, a piston moving up-and -down in the cylinder body, under the piston, sealing gasket cooperating hermetically with the cylinder body, a brace table under the cylinder body, and a endless displacement tank on the edge of the cylinder body formed by which and the brace table, which linking to solution in hole collecting device by tubing guide.

本发明公开了一种高压收集硬化混凝土孔溶液的装置，包括一个缸体和一个可在缸体内上下运动的活塞，在所述活塞下方设有与所述缸体密封配合的密封垫片，所述缸体下方设有一支撑台，所述缸体与所述支撑台在所述缸体内径边缘形成一环状排液槽，所述环状排液槽通过导流管与孔溶液收集装置相连。

The most interesting thing is that the space group of a non-chiral macrocycle was a chiral symmetry one. With a p-chlorophenyl substituent, the structure of the aromatice macrocyclic oligomer was unsymmetrical.

利用晶体结构参数计算出大环分子环状孔穴的有效直径，为这类刚性环状齐聚物作为一类纳米结构材料的应用作了理论上的准备。

What are your goals and strategies for growth?

你的成长目标和策略是什么？

And unto the angel of the church in Sardis write; These things saith he that hath the seven irits of God, and the seven star I know thy works, that thou hast a name that thou livest, and art dead.

3：1 你要写信给撒狄教会的使者，说，那有神的七灵和七星的，说，我知道你的行为，按名你是活的，其实是死的。