对称地

Based on the study in Lotus japonicus, a model legume plant in Papilionoideae, scientific groups led by Luo Da demonstrated that TCP proteins have been independently recruited as determinants of petal identities along the dorsoventral axis in two distant lineages of flowering plants Antirrhinum majus and Lotus japonicus, suggesting a synapomorphic origin for the mechanisms in the control of floral zygomorphy.

以蝶型花亚科的百脉根为研究对象，罗达等研究组阐明了在豆科与其他物种基因组中调控花对称性发育的分子机制具有共源性，揭示了在高等植物花形进化过程中，不同进化关系的开花植物独立地招募TCP基因，调控了两侧对称花发育过程中背腹轴的发育。

In this paper, the multivariate archimedean copula is used to analyze the asymmetric dependence structure among financial asset returns, whose marginal processes are captured by nonparametric kernel density estimation.

在研究金融资产的组合风险分析中，描述多个金融资产间的相关结构是选择最优组合权重的关键因素之一，如何准确地刻画金融资产间的非对称尾部相关结构，在定量研究组合资产的风险分析中尤其重要。

Why are there differences between financing contracts of equity and debt This paper demonstrates the deficiencies of such classical theories as differentiation of rights,policy environment,financial stress,agent costs,asset specificity,risk preference and risk sharing.

为什么市场上会存在入股与借贷两类金融合约？权利差异、政策环境、财务风险、信息不对称、代理成本、资产专用性、风险偏好、风险分担等理论都无法充分地给予解释。

The self-supported chiral catalysts as novel immobilization of homogeneous catalysts strategy demonstrated excellent enantioselectivities in heterogeneous catalysis of a variety of asymmetric reactions.

近年来，手性自负载催化剂作为一种新的负载模式，已经成功地应用于一些非均相催化的不对称反应中。

independent audit is essenttially a group of contract among client,bailee and federation of cpa.those factors, such as economic activity's uncertainty,asymmetric information and limited rationality have resolved that contract is almost imperfect.so adverse selection and moral hazard always exist in all the course of signing and carrying a contract,and seriously in the responsibility insurance of cpa decided by professional characteristic of independent audit,and particularly in our country decided by "state-owned property right" and "public contract" of our state-owned enterprise.

独立审计实质上是委托人、受托人和注册会计师协会之间的一组契约的集合。经济活动的不确定性和复杂性，信息的不完全和不对称以及签约双方的有限理性等因素决定了契约总是不完备的，几乎在所有契约的签订和履行中，都不同程度地存在逆向选择和道德风险问题；独立审计的职业特点，决定了注册会计师执业责任保险中逆向选择和道德风险问题的严重性；我国国有企业"公有产权"和"公共契约"特性，决定了我国独立审计执业责任保险中逆向选择和道德风险问题的特殊性。

independent audit is essenttially a group of contract among client,bailee and federation of cpa.those factors, such as economic activity's uncertainty,asymmetric information and limited rationality have resolved that contract is almost imperfect.so adverse selection and moral hazard always exist in all the course of signing and carrying a contract,and seriously in the responsibility insurance of cpa decided by professional characteristic of independent audit,and particularly in our country decided by "state－owned property right" and "public contract" of our state－owned enterprise.

摘 要］独立审计实质上是委托人、受托人和注册会计师协会之间的一组契约的集合。经济活动的不确定性和复杂性，信息的不完全和不对称以及签约双方的有限理性等因素决定了契约总是不完备的，几乎在所有契约的签订和履行中，都不同程度地存在逆向选择和道德风险问题；独立审计的职业特点，决定了注册会计师执业责任保险中逆向选择和道德风险问题的严重性；我国国有企业"公有产权"和"公共契约"特性，决定了我国独立审计执业责任保险中逆向选择和道德风险问题的特殊性。

independent audit is essenttially a group of contract among client,bailee and federation of cpa.those factors, such as economic activity's uncertainty,asymmetric information and limited rationality have resolved that contract is almost imperfect.so adverse selection and moral hazard always exist in all the course of signing and carrying a contract,and seriously in the responsibility insurance of cpa decide

经济活动的不确定性和复杂性，信息的不完全和不对称以及签约双方的有限理性等因素决定了契约总是不完备的，几乎在所有契约的签订和履行中，都不同程度地存在逆向选择和道德风险问题；独立审计的职业特点，决定了注册会计师执业责任保险中逆向选择和道德风险问题的严重性；我国国有企业"公有产权"和"公共契约"特性，决定了我国独立审计执业责任保险中逆向选择和道德风险问题的特殊性。

The characteristic, difference and relation of the normal and inverse design are compared detailedly. The formula of the first and second class eigen sensitivity are given. For the horizotal vibration system of building structure, the sensitivity method and perturbation method are adopted to modify the dynamic characteristics. The inverse eigenvalue problem of Jacobi matrix and the positive, symmetry, band matrix are studied. The method of Evolutionany Computation is first used in the inverse design of building structure, the principal problems are studied. The features of aseismatic inverse design of building are analysed.

本文较详细地比较了正、逆设计的特点；给出了特征值和特征向量的一阶和二阶灵敏度分析公式；对于建筑结构水平振动系统，提出了结构动态特征的修改方法；对Jacobi矩阵及实对称带状矩阵的逆特征值问题进行了分析研究，首次将其引入建筑结构抗震逆设计中；首次将进化计算方法应用于建筑结构抗震逆设计中，对主要问题作了探讨；对建筑结构抗震逆设计的特点进行了分析，提出未来的发展方向和前景。

Beryl is a hexagonal crystal, and as such has four axes of symmetry.

绿玉石是六角形的水晶，而且同样地有对称的四个轴。

It is shown that baryogenesis via leptogenesis occurs quite naturally, with a single phase (determined from neutrino oscillation data) appearing in leptonic asymmetry and in neutrinoless double beta decay.

而且能很自然地由轻子数破坏产生重子不对称的实验观测值。很有趣的是这类模型中出现在轻子不守恒和无中微子双beta衰变中的相位是一样的。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。