交叉地

Under high dilution,the cross-coupling reactions of 4,5-dicyano-1,3-dithiol-2-one(6) and dithia crown-ether annulated tetrathiafulvalenes(3a～3c) in toluene gave asymmetrical dicyano tetrathiafulvalene derivatives(7a～7c) in the presence of triethyl phosphite.The compounds 7a～7c were characterized by(~1HNMR,EA,MS and IR.

在甲苯溶液中，在亚磷酸三乙酯存在下，采取高度稀释的方法，使4，5-二氰基-1，3-二硫杂环戊二烯-2-酮分别和多缩硫杂冠醚进行交叉偶联反应，成功地得到了不对称的2，3-二氰基四硫富瓦烯衍生物。

In chapter four, the preperation of ytterbium diiodide was examined. The reductive cleavage of Se-Se bond and S-S bond induced by ytterbium diiodide was investigated. The reaction of diselenides and disulfides with allylic bromide promoted by ytterbium diiodide was also examined. The intermolecular Barbier-type reaction induced by ytterbium diiodide was studied. In the last section of this chapter, the intermolecular reductive coupling of nitriles with azides induced by samarium diiodide was investigated.

第四章，研究了二碘化镱的制备方法，以及二碘化镱作为一种优良的单电子转移试剂在有机合成中的应用：二硒醚的Se--Se键和二硫醚S-S键的还原断裂，及其在合成烯丙基硒醚，硒代酯和烯丙基硫醚，硫代酯中的应用，实验结果表明二碘化镱也能促进分子间的Barbier反应，而文献认为二碘化镱不能促进分子间的Barbier反应；最后研究了二碘化钐促进的叠氮化合物与腈的交叉还原偶联反应，一步高收率地制备脒的方法。

Mainly historiographic in method, this research links up theory with real proof with the marginal character, drawing on the theories and methods of the theory and method of the science of communication, public opinion and social psychology.

第三，在以史学研究方法为主的前提下，适当借鉴运用传播学、舆论学、社会心理学等几种相关学科的理论和方法，使这一研究具有学科交叉的&边缘&性特征，并且较好地做到了理论与实证的洽通。

In the past two decades,it has been proved by clinical applications that shockwave lithotripsy is a successful treatment for urinary stones.

这一技术充分体现了基础自然科学在医学中的成功应用，而典型地反映出当今科学的发展趋势——学科间的相互交叉和渗透。

Owing to the influence of industry sewage, living sewage, the lixiviate things of soil in the wet-dry zones and the falling of water self clean ability, the water quality of reservoir will be influenced and the fluctuation in stage will share a inverse relationship with the regression of river level in the natural state.

由于受到陆地污染物的进入、淹没地污染物的浸出以及水体自净能力下降的影响，消落带水环境存在着岸边污染带和水陆交叉污染两方面的问题，将严重影响库区水环境质量，扰乱该地区原生生态系统，影响三峡库区生态环境安全。

Aimed at these problem, this paper taked 63 well drilling's rock mineral document and logging document as main analysis object, combined reservoir sedimentology, sequence stratigraphy, logging geology together to research sedimentary system, sequence stratigraphy, lithofacies paleographic, sandbody distribution three dimensional visualization, reservoir character and reservoir sandbody comprehensive evaluation, it offers reference and criterion for Changbei gas field gas reservoir's exploration and development.

针对目前所存在的地质问题，本论文以63口钻井的岩矿资料和测井资料为主要分析对象，运用储层沉积学、层序地层学、测井地质学等多学科交叉的综合研究方法，对长北气田上古生界二叠系山西组2段进行沉积体系、层序地层、岩相古地理、砂体展布三维可视化、储层特征以及储集砂体综合评价和有利区预测等方面进行系统和深入的研究，为更有效地勘探开发长北气田提供科学依据。

A quantum clonal algorithmto deal with multicast routing problem is presented in this paper,which saliently solves the"prematurity"problem in Genetic based multicast algorithm.Furthermore,the algorithm is accelerated by using quantum crossover.

提出量子克隆多播路由算法，有效地解决了&遗传&多播路由算法中的&早熟&问题，量子交叉的引入，加快了算法的收敛速度。

With these versatile catalyst systems, electronically and sterically diverse reactants can be efficiently cross-coupled, without the need for substrate-specific optimization of reaction conditions.

凭借这些&神通广大&的催化剂系统，那些电子云和空间位阻各不相同的反应物都能有效地实现交叉偶联，无需针对底物对反应条件优化。

In this prospective, double-blind, crossover study by the Deep-Brain Stimulation for Parkinson's Disease Study Group, electrodes were implanted bilaterally in the subthalamic nucleus in 96 patients, and in the globus pallidus in 38 patients.

在这项前瞻性、双重盲目、交叉进行的研究中，该团体Deep-Brain Stimulation for Parkinson's Disease Study Group以电极左右对称地植入在九十六位病患的丘脑下，与三十八位病患的苍白球上。

SLD series bin container Lifter is mainly used in pharmaceutical industry for transferring and charging powder and granules. It can be used along with various main equipments, such as container blender, Tabler press, capsule filling machine and so on. It optimizes production-flow, avoid the dust and cross-contamination. It's the ideal transfer equipment in pharmaceutical industry for solid dosage section. Meanwhile, it can be also widely used in chemical industry, food-stuff industry, etc.

SLD 系列料斗提升上料机主要用于制药企业的粉状、颗粒状等固体物料的输送加料，可与混合机、制粒机、压片机、包衣机、胶囊填充机及包装机等工艺设备配套，能有效地减少交叉污染与粉尘，减轻了劳动强度，且物料不分层，是制药厂理想的物料输送设备，同时在化工、轻工食品等行业亦可广泛使用。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。