环

This system uses a ring structure instead of complex multiangular optics structure.

导师王乃彦院士提出了应用激光能量储存环技术的多脉冲放大技术，这个技术是将种子光分解成同一方向上间隔相等的序列脉冲，通过放大器进行放大，放大的序列脉冲依次注入激光能量储存环中的拉曼池通过受激拉曼效应将能量传递给在激光能量储存环中的回转的一个stokes光，最后通过电光开关将经过多次放大的stokes光引出。

The discovery is very significant for the cricophyarnegeus muscle myotomy,diagnosis and treatment of the cricopharynegeus muscle spasm,and research about the relationship of the cricopharynegeus muscle and inferior laryngeal nerve.

本研究对于指导环咽肌切断术，诊治环咽肌失驰缓症，探讨喉下神经和环咽肌的关系等有重要的临床意义。

The polymer also had better moisture resistance because of the hydrophobic nature of DCPD and naphthyl groups.

由于憎水性的萘环结构和环戊二烯环的引入，固化产物也表现出良好的耐水性。

Some products included methoxy group, naphthyl and heterocyclic aromatic moieties, and some were borne with two 1-propynyl groups. It is more important that compounds bearing halogens were also synthesized via this protocol.

运用此法不仅合成出一些含有醚键、萘环、杂环以及含有两个1-丙炔基的化合物，重要的是芳环上含有卤原子的化合物也能顺利地合成出来。

The impact of circuit process REST the main body of a book is adjusted by studying closed cycle over navar real time nature, has given a system technology out the quantitative-rization result that the index and closed cycle concern between responding to , may track the function valuation criterion as one kind of the navar closed cycle.

本文通过研究闭环调节回路过程响应时间对控制系统实时性的影响，给出了系统技术指标与闭环响应之间关系的定量化结果，可作为一种控制系统的闭环跟踪性能评价准则。

The process of establishing neural network is as follows: two-layer neuronic network configuration is selected, S-type active function is used, input parameter of network are selected for thickness, preheat temperature, heat input and sampling point, output parameter of network is selected for fracture toughness property CTOD, learning algorithm of network is used for back-propagation algorithm.

本文选择了2层神经元的神经网络结构，采用S型激活函数，将板厚、预热温度、线能量、取样位置作为神经网络的输入，将环焊接头的裂纹尖端张开位移CTOD值作为网络的输出，通过BP算法的网络学习，采用VC语言建立了X70管线钢环焊接头CTOD与环焊工艺之间的神经网络。

The process of establishing neural network is as follows: input parameters of network are selected from thickness, preheat temperature, heat input, welding position and sampling point, output parameter of network is impact ductility CVN, two-layer neuronic network configuration, S-type active function and back-propagation learning algorithm are selected.

文章摘要：采用VC语言实现了X70管线钢环焊接头冲击韧性与环焊工艺之间神经网络结构的建立过程，将壁厚、预热温度、线能量、焊接位置、取样位置作为结构的输入，将环焊接头的CVN值作为结构的输出，选择了具有2层神经元的神经网络结构和S型激活函数及BP学习算法。

As a result, the two beams of light don't have Faraday nonreciprocal phase error.

仿真结果表明，交叉环有很低的轴向磁场灵敏度，与轴向磁场灵敏度为23.4/的普通环相比，其他参数相同、不对称度为1%的交叉二极子光纤环，轴向磁场灵敏度仅为0.23/。

The reactions include, organometallic reactions (grignard reaction, organolithium -zinc, and -copper chemistry ), metal catalyzed reactions, mannich reaction, nitration, hydrogenation, azidation, amino-protection reactions, organoalluminum catalyzed beckmann rearrangement, schmidt rearrangement, epoxidation, epoxide ring opening reactions, swern oxidation etc.

这些反应包括：有机金属反应(格利亚反应，有机锂，有机锌和有机铜反应)，金属催化反应堆(suzuki 反应， negish 反应)， mannish 反应，硝化反应，氢化反应，叠氮反应，各种基团的保护和脱保护反应，有机铝催化的贝克曼重排反应，斯密特重排反应，环氧化反应，环氧烷开环反应， swern 氧化反应等。

The reaction of cyclic b-keto esters with CF3CO2ZnCH2I provides the corresponding ring-expanded products with the advantage of mild condition in moderate to good yields. A simple and efficient procedure has been developed for a variety of 1,3-diketones converted into the corresponding 1,4-diketones and trans-1,2-disubstituted cyclopropanols in high yields. In conclusion, this new type of organozinc reagents has been developed for many useful reaction in organic synthesis.

利用有机锌试剂所具有的双重特性，在新型的Baylis-Hillman反应中，可以直接与炔基酮和醛反应一锅制得多官能团的三取代的顺式烯；在b-酮酯化合物的扩环反应中，取得了重要进展，得到了增加一个碳的扩环产物，&一步法&合成，反应条件温和、环境友好；在1，3-二酮分子中成功地插入1个碳，合成出1，4-二酮和环丙醇，为现代有机合成提供了新的合成方法，具有良好的应用前景。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。