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In [8, 10, 11], Hwang, Chen, and Wright proposed the directed version of the undirected chordal ring network and derived the diameter of a directed chordal ring network.

在文献[8， 10， 11]中，黄光明老师、陈尚宽学长、以及Wright，将「无向的弦环式网路」推广成「有向的弦环式网路」，并给出计算「有向的弦环式网路」的直径的方法。

Compared with the double bond of cyclopentene ring, the double bond of the norbornene ring has much more lower activation energy in the hydrogenation and the main intermediate product is 14,15-DHTCPD.

非晶态合金催化剂晶化过程的原位分析结果表明，在热处理温度低于150°C条件下其结构基本保持稳定，而高于450°C条件下热处理后晶化度大于90%，600°C以上热处理后完全晶化。

By 2010, the ultimate form of "two vertical (Beijing-Zhuhai High-speed, high-speed large-Canton) a transverse (Dracocephalum high-speed) of a ring (outer ring of high-speed)" the main framework of the highway network, the realization of Handan City with its neighboring cities have high-speed road connected to the urban area to the counties are connected to the highway or a highway, county highways, county highway between the two linked above, between the counties and townships and major between the level of township roads connect every village access circuit in the city to build the framework of urban-centered economic circle one hours of traffic, to shape the urban and rural integration, radiation surrounding, convenient, fast and efficient modern highway traffic patterns, for building a moderately prosperous society to lay a solid foundation.

到2010年，最终形成以&两纵一横一环&为主框架的高速公路网，实现邯郸市与周边城市有高速公路相连、市区到各县均有高速公路或一级公路相连、县县通高速公路，各县之间有二级以上公路相连、县乡之间和主要乡镇之间有等级公路相连、村村通油路，在全市范围内构筑起以市区为中心的1小时交通经济圈，塑造城乡一体、辐射周边、四通八达、高效快捷的现代化公路交通大格局，为全面建设小康社会奠定坚实的基础。

First, the preparation of the aminom ethylation of tannin using its electrophilic reaction activity of C-6, C-8 in ring-A; then process the quaternization base on the aminom ethylation; last, progress the sulfonation by use of the activity of phenolic hydroxyl hi ring-B.

首先利用单宁A环的C—6、C—8的亲电反应活性制备单宁胺甲基化产物；然后在胺甲基化的基础上进行季胺盐化；最后利用单宁B环的酚羟基的活性进行磺化。

It consists of symmetric spherical roller,two pcs of prssed steel cages,flangeless inner ring and guide ring centred on the cage.In general,this kind of bearing has more roller quantities and higher dynamic load rating.

国际最新设计，对称滚子和两片钢冲压保持架组成内圈无挡边，没有中挡圈，调心滚子一般会增加2到4个，提高轴承的径向额定动载荷。

Advanced production technology, quality, stable and reliable, high-precision testing facilities, high technological content and overall passed the ISO9001 quality system certification, and achieved rotation axis Labiatae ring, O-ring permits are in progress QS9000 car Auto Parts and Quality Management System, the certification process.

生产工艺先进，质量稳定可靠，高精度的检测设施，科技含量较高，并全面通过了ISO9001质量体系认证，取得了旋转轴唇形密封圈、O形密封圈的许可证，现正在进行QS9000汽车及汽配质量管理体系的认证工作。

The structure characters of this kind of molecules were discussed. The results show that the phenyl group located in the 4- or 5- position of pyrryl ring are not coplanar with the pyrryl ring.

对这类吡咯环上4或5-位有芳环取代基时化合物的晶体结构特征进行了扼要讨论，晶体衍射实验结果表明，4， 5-位上的芳环与吡咯环本身处于非共平面结构。

As we well known, the relation between the ideal and congruence of ring is one to one. The skew-ring congruence of regular semiring and qusi-regular semiring are characterized by using of a class of special ideals of semirings and a construction method of regulal subdirect product of regular semirings is given by using of a special mapping on semirings is also studied in this paper.

众所周知，环的理想和同余之间是一一对应的，受此启发，本文利用半环的一类特殊理想刻划了正则半环与拟正则半环上的skew-环同余，并利用半环上的一个映射给出了正则半环的正则次直积的一种构造。

Based on the construction of Danxi Bridge in Yiwu,this paper introduces the construction technology for installing main arch ring and sideling arch ring of leaned tied arch bridge.

以义乌丹溪大桥为背景，全面介绍了国内首座斜靠式系杆拱桥主、斜拱圈安装施工技术。

Comparisons between the experimental and computational IR spectra clarify the difference of the open- and closed-ring isomers, which indicate that it is possible to identify the tautomeric form of this diarylethene derivative using a highly selective infrared absorption band and the strong absorption at 1 705 cm-1 of the ring-closed isomer can be used in non-destructive readout by IR light.

通过红外吸收光谱表征了该光致变色二芳基乙烯衍生物在溶液中开、关环前后结构的变化，并采用理论化学计算方法研究了该化合物开、关环异构体的红外吸收振动特性。光致变色异构化过程可以通过红外吸收光谱的变化而识别。关环异构体在1 705 cm

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。