| 单词 | asymmetric |
| 释义 | asymmetric [英 [?e?s??metr?k] 美 [??s??m?tr?k] ] asymmetric的意思、解释 asymmetric 基本解释 形容词不对称的，不匀称的; 非对称的 asymmetric 反义词 形容词symmetric asymmetric 网络解释 1. 不对称：束腰(DroppedWaist)正流行 A is不对称(Asymmetric),今年红地毯的不对称美显然成了众多设计师的灵感来源,纷纷推出单肩婚纱,也让其流行达到一个高潮. B is 背部细节(BackDetail),一排精致的蝴蝶结或者一 2. 非对称的：astrosphere 星心球 | asymmetric 非对称的 | asymmetry 非对称 asymmetric 双语例句 1. In particular, the Fano factor for the asymmetric contact structures is more than double that of symmetric ones due to increased backscattering, and is within the experimental range. 特别的，Al(001)面的非对称结构的单原子接触的Fano Factor是对称结构的两倍多，并且其计算数值在实验范围之内。 2. On the practice of supply chain management, we always studied the carriers`performance when the shippers choose carriers to carry for him. This kind of research belong to afterwards assess, it is short of goad and initiative. Many cases about lose can be find everywhere because of choosing improper carriers, the main reason is that there exist asymmetric information between the shipper and the carrier. 在供应链管理实践中，托运人对承运人的选择多从对承运人绩效考核的角度进行研究，这是一种事后考核的管理，缺乏激励和主动性，导致因选择承运人失误而造成大量损失的案例比比皆是，这主要是由于托运人与承运人之间存在信息不对称的原因造成的。 3. asymmetric的反义词 3. A series homopolyme of ethylene synthesised by metallocene catalyst was analyzed by the high temperature gelatin permeation chromatography. The results showed that the molecular weight distribution changed not too much when the ratio of Al/Ti ranging between 1000 and 4000, while the molecular weight distributed increased from 2.48 to 2.81 when the ratio ranging between 4000 and 7000; catalyst D had the lowest activity to be used as asymmetric metallocene catalyst; the curve of molecular weight moved much to the left with the increases of temperature and two active centres appeared when the temperature is 70℃. 通过高温凝胶渗透色谱对茂金属催化合成的一系列乙烯均聚物进行了分析，可以看出Al/Ti比从1000变到4000时，分子量分布曲线图变化不大，而从4000变到7000时，变化相当大，分布宽度从2.48增至2.81；催化剂D的活性最小，可作为非对称性茂系金属催化剂；该聚合体系分子量的大小受聚合温度的影响很明显，随温度的升高，分子量分布曲线图向左发生很大位移，在聚合温度为70℃时存在两个活性相当的活性中心。 4. The basic principle and application conditions of capacity spectrum method are introduced by the example of seismic performance evaluation on one building asymmetric in torsion. 分析表明，采用Pushover方法对平面不规则结构进行抗震性能评估时需确定加载的方向。 5. No, it's highly asymmetric. 不，它是非常不均匀的。 6. This dissertation aims at the studies on the asymmetric syntheses of dihydropyrone natural product bitungolides A-F; a mild and efficient method of cleavage of tert-butyldimethylsilyland tetrahydropyranylethers using a catalytic amount of TBPA~SbCl_6~- in methanol also was studied. 本论文主要对二氢吡喃酮类天然产物Bitungolides A-F进行了不对称合成研究，同时还对TBPA~SbCl_6~-氧化脱除叔丁基二甲基硅醚和四氢吡喃醚进行了研究。 7. asymmetric的翻译 7. According to the data from the substitution reaction, the catalytic function of the phosphonium salts and the chiral quaternary ammonium salts has been compared. The followings are the main work of my paper. 1. It summarized the development of asymmetric synthesis and the latest studies of phase transfer catalyst; 2. Use PPh3 as the starting material, by the reaction of quaterization we get four common phosphnium salts as PTC-1、PTC-2、PTC-3、PTC-4; 3. Use L-Valine as the starting material, by the reaction of esterification, neutralization and quaterization, we get three chiral quaternary ammonium salts as PTC-5、PTC-6、PTC-7; ` 4. Use L-Valine as the starting material, through the reaction with Methyl chloroformate in order to protect the –NH2, and then react 本论文主要工作包括以下几个方面：1、综述了不对称合成的发展历程及相转移催化剂的进展和最新研究成果； 2、以三苯基磷为起始原料，合成了PTC-1、PTC-2、PTC-3、PTC-4 等四种普通的季鏻盐相转移催化剂； 3、以L-缬氨酸为起始原料，经过酯化、中和、季铵化等步骤，合成了PTC-5、PTC-6、PTC-7 等三种手性季铵盐相转移催化剂； 4、以L-缬氨酸为起始原料，用氯甲酸甲酯保护氨基，与L-苯丙氨酸甲酯反应，合成了一个环状二肽——2，5-二酮哌嗪环类化合物，它是一类新型的相转移催化剂； 5、对合成过程中涉及的产物和中间体用1HMNR、IR、EA 进行了系统的表征和分析； 6、将制得的催化剂PTC-1—PTC-7 应用于亲核取代反应，将PTC-8 应用于亲核加成反应，验证了催化效果； 7、根据实验结果及相关原理，探讨了PTC 的诱导机制。 8. The collimator scatter factors for square fields, rectangular fields, symmetric and asymmetric, and irregular fields formed by blocks or multiple leaf collimator can be simply and accurately calculated with this method. It is suitable for clinical daily practice. 该算法可用于准确计算不同SCD处的方野、对称和不对称矩形野、挡铅或多叶光栏形成的不规则野的Sc，是一种适合于临床应用的简单准确的计算Sc方法。 9. The method of testing insulation resistance based on asymmetric electric resistance bridge for direct current distribution system is proposed. 提出了利用不对称电桥的直流系统在线绝缘电阻检测方法。 10. This paper discusses the effect of spiral laminae of polar materials on the stiffness of laminates and gives out the relation between spiral angle and equivalent elastic constants of the spiral laminates including asymmetric stresses and coupled stresses. 讨论极性材料螺旋铺层对层合板刚度的影响，给出了含不对称应力和偶应力的螺旋层合板等效弹性常数与螺旋角的关系，得到螺旋角的适当选择可以显著地提高层合板抗挠刚度的结论。 11. In accordance with superposition theorem and substitution theorem, the symmetric three-phase and asymmetric three-phase arc furnace electric power system is reduced as a one phase system. 从替代定理和叠加原理出发，将三相对称及不对称电弧炉系统简化为单相系统进行求解。 12. asymmetric的翻译 12. The advances in asymmetric reduction of prochiral ketones to chiral alcohol s with biocatalysis are reviewed. 综述了国内外利用生物催化羰基的不对称还原合成手性醇的研究情况。 13. Asymmetric borane reduction of prochiral ketones is a good process to the synthesis of enantiomerically enriched secondary alcohols. 硼烷对前手性酮的不对称还原是合成手性仲醇的重要方法。 14. Asymmetric hydroboration is a kind of widely applied and valuable reaction, in which borane reduction of prochiral ketones reaction is an important method. 不对称催化硼氢化反应是应用广泛且具有工业价值的反应，其中的硼烷还原前手性酮反应有着举足轻重的作用。 15. Recent advances in asymmetric hydrosilylation of prochiral carbonyl compounds catalyzed by chiral transition metal complexes are reviewed in this paper with 47 references. 评述了近年来手性金属配合物催化的前手性羰基化合物的不对称硅氢化反应研究进展。 16. 16. The asymmetric addition of organometallic reagents to prochiral imine in the presence of chiral ligands is attrac... 有机金属试剂在手性配体促进下对潜手性亚胺的对映选择性加成已成为有兴趣的课题之一。 17. The nonlinear optical characteristics in asymmetric coupled Zn 1-x Cd xSe/ZnSe quantum wells have been investigated by using the reflective second harmonic generation measurement technique. 采用反射式二次谐波产生方法对非对称Ⅱ-Ⅵ族耦合量子阱Zn1-xCdxSe/ZnSe的非线性光学特性进行了研究。 18. We developed a large scale preparation and purification of a new asymmetric phthalocyanine zinc compound, 2-carboxyphthalocyanine zinc. 设计并制备了一种组成和结构单一的新型两亲性酞菁锌光敏剂。 19. asymmetric的解释 19. There are one Zn2＋, six DAT molecules and two in the minimum asymmetric unit of the title compound. 在目标配合物的最小不对称单元中有1个Zn2＋，6个DAT分子和2个。 20. Unsaturated compound and asymmetric oxidation of sulfide. β-不饱和化合物以及不对称氧化硫化物反应中的应用。 asymmetric 词典解释 1. 不均匀的；不对称的 Asymmetric means the same as asymmetrical . asymmetric 单语例句 1. Under such a goal, the rise in interest rates will be limited and asymmetric. 2. Another 2 to 3 euros went by using identical side mirrors rather than the asymmetric pair found on most new cars. 3. Asymmetric interests and different positions are limiting its ability to present a united position and collective influence on global governance. 4. We think this is a de facto asymmetric rate hike, with average deposit rates rising more aggressively than market expectations. 5. It is patently obvious that they are in the dark and we are in the open in this asymmetric peekaboo contest. 6. What is most challenging is to find effective policies to deal with the consequences of extremely asymmetric expansion of the global economy. 7. Ferrari recovered well from a fall from the asymmetric bars that had threatened to leave her without a medal. 8. Widely called an " asymmetric " rate rise, the differential makes it less profitable for banks to make loans. 9. It also has a unique asymmetric design for the front end, which gives it a futuristic look. 10. During the past 30 years we have adopted an asymmetric market liberalization approach. asymmetric 英英释义 adj 1. characterized by asymmetry in the spatial arrangement or placement of parts or components Synonym: asymmetrical |
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