asymmetric(al)

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. 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。

3. A new pulse sealing treatment, involving the use of an asymmetric pulse power supply to seal the anodic film on an Al substrate immersed in a solution of aluminum sulfate, has been developed.
研究了一种采用双向脉冲电源将铝合金阳极氧化膜在硫酸铝溶液中进行封闭的绿色工艺。

4. In the study of gelation kinetics of asymmetric membrane formation via phase inversion, Strathmann et al.
本文采用了一套先进的实验装置来测定用相转换法制备非对称膜的凝胶速度，得到了和Strathmann等人不同的结果。

5.

5. Summary of the Ph. D. Dissertation In this dissertation, we thoroughly investigated theory and experiments on the Second Harmonic Generation of the compositional asymmetric GaAs/Al〓Ga〓As Step Multiple Quantum Wells by intersubband transitions.
本文对GaAs/Al〓Ga〓As阶梯型多量子阱的二次谐波产生进行了系统的理论和实验研究。

6. We have designed and prepared a new family of chiral imidazolium based ionic liquids(identified by NMR and IR et al.) based on amino acids derived from the chiral pool by a simple and straightforward procedure, and the induction ability of chiral imidazolium salt for asymmetric catalytic benzoin condensation reaction has been probed. Nevertheless, low enantioselectivity has been detected, and more work would be performed for enantioselective processes in the future.
以天然光学纯氨基酸为手性源简便合成出了几种手性咪鎓盐盐离子液体，并考察了其催化苯甲醛的安息香缩合反应的手性诱导性能，初步研究结果表明其手性诱导能力较差，有待于进一步优化手性咪唑鎓盐离子液体催化剂的改进。

7. Asymmetric Hydrogenation of Methyl Pyruvate and Acetophenone Catalyzed by Al_2O_3 Supported Pt Nanoclusters or Ru Catalyst; Research on the Catalytic Process of Hydrogen Production from Dimethyl Ether Reforming
负载型金属催化剂催化丙酮酸甲酯和苯乙酮不对称加氢反应的研究二甲醚重整制氢催化反应过程的研究

8. Brownian motor is a nanometer scale machine and an asymmetric structure in space. The transport of Brownian particles is driven by some non-equilibrium processes, such as external load force, chemical potential difference, temperature difference, et al.
布朗马达作为一种纳米级的微小机器，具有空间不对称结构，布朗粒子的传输受到外力、化学势差或温差等非平衡过程驱动。

9.

9. The progress in the PMO theory made by Dewar, Hoffmann, Epiotis, Houk, Wolfe and Kost et al, is reviewed. The various PMO methods have been used as the useful instrument for analyzing the effects of the orbital interactions on the molecular geometry and on the sterospecific and regiospecific reactions, such as 1, 2-asymmetric addition to carbon-oxygen double bond of ketone and various cycloaddition reactions.
经Dewar，Hoffmann，Epiotis，Houk，Wolfe和Kost等理论化学家的努力，PMO理论已经成为研究影响分子构型、构象和(立体专一性和区域专一性)反应产物的结构因素的一个有效的手段。

10. Heterogeneous Asymmetric Hydrogenation of Acetophenone and Its Derivatives over Ru - (S) - BINAP/γ - Al_2O_3
Ru-（S）-BINAP/γ-Al2O3催化剂上苯乙酮及其衍生物的多相不对称加氢反应

11. Preliminary trials of the asymmetric reaction showed that-Br-BINOL-Al was a promising system with moderate enantioselectivity and good reactivity.
初步的实验表明-Br-BINOL-Al是一个比较有前途的反应体系，获得中等的对映选择性和较高的反应活性。

12. Generally, both methods reporduce faithful results as those of Huang et al. For mirror periodic method, the data are extended once forever. Ideally, it is a way for handling the end effects of the HHT, especially for the signal that has symmetric waveform. The extrema extending method behaves as good as MPM, and it is better than MPM for the signal that has strong asymmetric wave form.
结果 首先对系列由标准的周期函数构造而成的时间序列信号进行了EMD处理，验证HHT方法分解的可行性、有效性；然后分别对例正常人脉搏波信号和一例典型的冠心病人脉搏波信号进行分解处理，对得到结果进行了比较。