不对称的

In this thesis, we developed chiral proton N-O type ligands and employed them in the enantioselective addition of diethylzinc to N-diphenylphosphinoyl imines. The relationship between the structure of the ligands and the enantioselectivity was systematically studied. Furthermore, enantioselective butylation of N-diphenylphosphinoyl imines withBu〓Zn and enantioselective diphenylzinc addition to imine were also examined.

本文致力于亚胺的不对称催化有机锌试剂加成反应的研究：以手性质子型N-O配体为促进剂，对N-二苯基次膦酰亚胺进行不对称乙基锌加成反应而展开研究工作，系统地考查了手性配体的结构对反应的影响；另外，对N-二苯基次膦酰亚胺的不对称催化丁基锌加成进行了研究，并首次对亚胺的不对称苯基锌加成反应进行了初步探索。

It is on the basis of an analysis of the financing behavior that the author draw a conclusion: the optimal financing strategy is determinedby the tangency point of quantity indifference curve of financing and cost indifference curve of financing, furthermore which means to equal to for random two kinds of the marginal financing cost of financing product.

我国证券市场供求的统计范围应该主要界定为证券的一级市场，供给的统计口径应按照新的融资方式分类标难来确定。在对我国证券市场1987—1999年的实际总供求按新的口径范围计算和分析后表明：我国证券市场的平衡是一种管制性的动态平衡，在供给机制与需求机制不对称的同时，需求大于供给。

She introduced how to choose reasonable software sale platform to sell software in detail to abroad achieve for the enterprise close; Hubei thought of far IT prexy Dr. Wen Zhumu to make a theme be " the line that the talent below financial crisis develops " speech, yes IT If how course of study walks out of predicament below financial crisis, the problem talked about his analysis, appeal everybody tries hard to solve together most the problem of the information asymmetry of core, be China IT The industry expands the power that contributes his; And software and Zhou Hong of Internet product expert strategics of product of bridge criterion prate,"Make a product the first view a trade, the 2nd see the market, final ability sees a client -- after recognize general trends take advantage of an opportunity and succeed likely for ability, and about innovating, the most important origin is fixed position, any innovation that leave this way are be destined to want to fail ".

她详细介绍了如何选用合理的软件营销平台将软件销至海外为企业创收；湖北思远信息技术学院院长文珠穆博士作了主题为"金融危机下的人才培养之道"的演讲，对 IT 业在金融危机下面如何走出困境的话题谈了自己的分析，呼吁大家一起努力解决最核心的信息不对称的问题，为中国的 IT 产业发展贡献自己的力量；而软件与互联网产品专家周宏桥则大谈产品兵法，"做产品第一看行业，第二看市场，最后才看客户——认清大势以后顺势而为才有可能成功，而关于创新，最重要的原点是定位，离开这个方向的任何创新都是注定要失败的"。

In west, there is not a generally accepted opinion, though there are much theoretical and empirical evidence, there are two theories: Dividend policy is relevant, vintner study dividend policy about dividend signaling by positive research, Jensen and Meckling created agency cost theory, they provide and analysis of the affects of agency conflicts among corporate stockholders, corporate managers and creditor; they suggest that management stock ownership can reduce agency cost by aligning their interests with shareholder's interest.

因为一定量的内部留存收益是保证公司长期发展的重要资金来源，而股利则为股东提供当期收入，股东对股利的不同偏好直接影响公司未来的股票价格，从而影响公司的发展，因此，在信息不对称的条件下，如何将公司实现的收益在股东和内部留存之间进行合理分配，以制定一个合理的股利政策，使股利的发放与公司的未来持续发展相适应，并使公司股票价格稳中有升，便成了公司管理层难以处理的实际问题，也使得对影响我国股利分配政策影响因素的研究变的尤为重要。

Leaves 3 or 4(–8) per ultimate branch; sheath densely deciduously setose; auricles readily deciduous, falcate; oral setae radiate, purple, ca. 3 mm; ligule prominent, ca. 5 mm; blade lanceolate, 10–23 ×(1–)2.5–3.3 cm, secondary veins 7- or 8-paired, abaxially yellow-green and white tomentellate, adaxially light green and glabrous, base asymmetrically cuneate, margins serrulate.

每末级的分枝的叶3或4(-8)；鞘浓密具刚毛的脱落的；叶耳容易落叶，镰刀形；口头的刚毛辐射状，变紫，约3毫米；杰出的叶舌，约5毫米；叶片披针形， 10-23 *(1-)2.5-3.3 厘米，次脉7-或8配对，背面的黄绿色和白色短绒毛，正面和无毛的淡绿，不对称的楔形的基部，边缘有细锯齿。

The results showed that the CV performance of PbO〓/PbSO〓 and PbSO〓/Pb powder microelectrode transformed from PbCO〓 under the optimize condition (the positive electrode was activated by asymmetric CV and asymmetric square wave current ways and the negative electrode using asymmetric CV) were better. Their electrode performances were as good as those made from leady oxide product by ball mill under the same conditions.

结果表明，将PbCO〓先制成粉末微电极，在30℃ 1.0mol/L H〓SO4〓溶液中经过化学转化为硫酸铅粉末微电极，以不对称信号活化(对PbO〓/PbSO〓电极，采用不对称循环伏安和不对称方波电流两种方法；对PbSO〓/Pb电极，采用不对称循环伏安法)得到电极的性能最好，正极活性物质的利用率高达89％，负极的达95％。

The two-dimensional structural units (such as silicon-oxygen tetrahedral sheet, octahedral sheet), interlayer space are assembled according to the sphere close packing manner, and the close packing layers parallel to {0001}. There are several mechanisms to release the difference in size while the silicon-oxygen tetrahedral sheet and octahedral sheet assemble the TO and TOT-type structural layers. The two types of structural layers with different interlayer space fitted together in six kinds of assembling modes and formed six kinds of crystal layers. The combinatorics analysis of the two-dimensional structural units revealed that there may be 28 kinds of TOT type interstradified minerals in six kinds of polysomatic assembling modes of interatradified structure. The structural layer is symmetrical for octahedron sheet in the structure of interstratified minerals and shows polarity characteristics.

结果表明，不同二维结构单元体（包括硅氧四面体片、八面体片、层间域的构筑基本符合球体紧密堆积原理，紧密堆积层平行{0001}；四面体片与八面体片构筑TO和TOT结构层时采取多种机制消除二者在二维尺寸上的差异；两种模式的结构层与不同类型的层间物组装形成六种组装模式的晶层；并通过二维结构单元体的组合规律的分析，计算出可能存在的28种TOT型间层结构，它们分属于6种间层结构多体性组装模式；间层结构中，结构层对于八面体片是不对称的，并在属性上表现出极性特征；间层矿物的晶层类型可用6种多体性组装模式加以表达。

Firstly, the essential definition of Venture Capital is given, and the basic operational process of venture capital investment is synoptically introduced. Secondly, in the environment characterized by uncertainty and asymmetrical information, the risk control mechanisms in contracting are discussed in detail, and several commonly employed risk control mechanisms are emphatically analyzed.

首先给出风险投资的基本含义，概括介绍了风险投资运作的基本过程；较为详细地讨论了存在不确定性和严重信息不对称的风险投资环境下的契约设计中的风险控制措施，重点探讨了实践中最常用的几种风险控制机制；对风险投资运作过程的最后也是至关重要的环节一退出，着重进行了论述。

The proposed method can work well under asymmetry element parmeters,and it is not necessary to consider the phase shift of ideal transformer or using multi-port net theory,which make the proposed method more applicable and simplify the calculat...

相分量算法不要求电力系统元件参数对称或循环对称、不利用多端口网络理论及理想变压器的移相，拓宽了故障计算的适用范围、简化了编程难度，并可推广到处理诸如线路换位不完全的参数不对称等其他电网不对称计算。

The proposed method can work well under asymmetry element parmeters, and it is not necessary to consider the phase shift of ideal transformer or using multi-port net theory, which make the proposed method more applicable and simplify the calculation program. The method is also capable of handling various unsymmetrical calcuations, such as the fault calcuation for power system without complete transposition.

相分量算法不要求电力系统元件参数对称或循环对称、不利用多端口网络理论及理想变压器的移相，拓宽了故障计算的适用范围、简化了编程难度，并可推广到处理诸如线路换位不完全的参数不对称等其他电网不对称计算。

They go to town. Would you just ask them?

他们在城里你能问他们吗？

Ossein pretreated for a2 weeks period exhibited the maximum% yield incase of bone gelatin, while the yield from intact skin was higher than that realized incase of de-scaled skin.

预处理时间达2星期的骨胶原表现出最高的骨明胶百分产量，然而从未处理鱼皮中得到的产率比去鳞的鱼皮得到的要高。