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Search Results: 1 - 10 of 160140 matches for " Li-Mei Zhao "
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(E)-2-Chloro-N′-(2-hydroxy-1-naphthylmethylene)benzohydrazide
Feng Qiu,Li-Mei Zhao
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808031371
Abstract: In the structue of the title compound, C18H13ClN2O2, a new Schiff base, the dihedral angle between the benzene and naphthyl ring system mean planes is 22.5 (2)°. The molecule has an E configuration about the C=N bond, and an intramolecular hydrogen bond involving the hydoxyl substituent on the naphthyl ring and the N′ atom of the hydrazide. The crystal structure is stabilized by intermolecular N—H...O hydrogen bonds, forming one-dimensional chains running parallel to the a axis.
3,5-Dihydroxy-N′-(2-hydroxybenzylidene)benzohydrazide monohydrate
Qing-Hua Jiang,Ying-Hong Xu,Ling-Yan Jian,Li-Mei Zhao
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536807067177
Abstract: The title potential antibacterial compound, C14H12N2O4·H2O, is a Schiff base which has an intramolecular O—H...N hydrogen bond and crystallizes with one uncoordinated water molecule, which links three symmetry-related molecules through two O—H...O and one N—H...O hydrogen bond. In the crystal structure, further intermolecular O—H...O hydrogen bonds link symmetry-related molecules, forming layers parallel to the bc plane.
Subordination Problems of Robertson functions
Li-Mei Wang
Mathematics , 2010,
Abstract: In the present paper, we are concerned with a subordination problem related to Robertson function. The radius of spirallikeness of Robertson function is also determined
Coefficient estimates for close-to-convex functions with argument $β$
Li-Mei Wang
Mathematics , 2010,
Abstract: This paper deals with coefficient estimates for close-to-convex functions with argument $\beta$ ($-\pi/2<\beta<\pi/2$). By using Herglotz representation formula, sharp bounds of coefficients are obtained. In particluar, we solve the problem posed by A. W. Goodman and E. B. Saff in $\cite{GS}$. Finally some complicted computations yield the explicit estimate of the third coefficient.
The titled Carathodory class and its applications
Li-Mei Wang
Mathematics , 2010,
Abstract: This survey mainly deals with the tilted Carath{\'e}odory class by angle $\lambda$ (denoted by $\mathcal{P}_{\lambda}$) an element of which maps the unit disc into the tilted right half-plane $\{w: \Re e^{i\lambda} w>0\}$. Firstly we will characterize $\mathcal{P}_{\lambda}$ from different aspects. In section 3, various estimates of functionals over $\mathcal{P}_{\lambda}$ are deduced from the known corresponding estimates of $\mathcal{P}_{0}$ or elementary functional analysis. Finally some subsets of analytic functions related to $\mathcal{P}_{\lambda}$ including close-to-convex functions with argument $\lambda$, $\lambda$-spirallike functions, $\lambda$-Robertson functions and analytic functions whose derivative is in $\mathcal{P}_{\lambda}$ are also considered as applications
CHEMICAL ETCHING BEHAVIOR OF SINGLE-CRYSTAL SILICON SLICE
单晶硅化学蚀刻行为的研究

WEN Jiu-ba,FAN Li-mei,ZHAO Sheng-li,ZHU Yao-min,
文九巴
,樊丽梅,赵胜利,祝要民

腐蚀科学与防护技术 , 2007,
Abstract: 用HF HNO3溶液蚀刻单晶硅表面,通过扫描电镜表征其形貌和厚度变化,研究了蚀刻液浓度、蚀刻时间及温度对单晶硅化学蚀刻行为的影响.结果表明,温度对蚀刻速率的影响较大,温度升高使表面蚀刻不均匀,厚度急剧减小;硅片的厚度及表面形貌在蚀刻液浓度大于2.0 mol/L时变化较显著;室温时用1.5 mol/L HF HNO3蚀刻15 min获得了蚀坑大小适中(10 μm~15 μm)、分布均匀的多孔状表面.
STUDY ON UNDERGROUND GASIFICATION MODEL TEST OF DONGSHAN COAL
太原东山煤地下气化模型试验研究

LIANG Jie,LIU Shu-qin,ZHAO Li-mei,YU Li,
梁 杰
,刘淑琴,赵丽梅,余 力

燃料化学学报 , 2004,
Abstract: 通过地下气化模型试验,获得了东山煤地下气化过程的一般规律。进行了东山煤空气气化及纯氧-水蒸气气化试验,研究了鼓风量及气氧比对煤气组成的影响、气化过程的稳定性以及试验条件下的煤层气化速率变化,进行了纯氧.水蒸气地下气化的物料衡算。试验结果表明,东山煤空气气化可以生产低热值空气煤气,鼓风量会影响空气煤气的组成;纯氧-水蒸气地下气化可以获得合格的二甲醚合成原料气,但需根据气化工作面的移动及煤气组成变化,采用移动点供风气化维持气化过程连续稳定进行。气化过程的物料衡算可以用来预测气化煤气的基本组成。气氧比影响煤气组成变化,试验条件下适宜的气氧比范围为1.8~2.2。气化工作面扩展速率在供风点附近出现最大值,变化平稳,瘦煤地下气化具有较高的稳定性。
Effects of stem-cutting ratooning treatment on the activities of some physiological indexes of photoperiod (temperature)-sensitive genic male sterile rice(PTGMSR)‘Peiai64S’
割茬再生对光温敏核不育水稻“培矮64S”若干生理活性指标的影响

ZHONG Lei,CHEN Xiao-Rong,TANG Li-Mei,ZHAO Bao-Zhen,
钟 蕾
,陈小荣,汤丽梅,赵宝珍

中国生态农业学报 , 2006,
Abstract: The effects of stem-cutting ratooning treatment on the activities of some physiological indexes of photoperiod(temperature)-sensitive genic male sterile rice(PTGMSR)'Peiai64S'were studied.The results show that the stem-cutting ratooning treatment can increase the content of chlorophyll and enhance the activity of nitrate reductase of the flag leaf.Meanwhile it promotes the accumulation of soluble sugar to panicle and increases the contents of free proline of flag leaf,stem,and panicle.
Fast Vehicle-logo Location Based on Local Symmetrical Character
基于局部对称性特征的快速车标定位

XIAO Fei,WANG Yun-qiong,LIU Li-mei,ZHAO Yang,
肖飞
,王运琼,刘丽梅,赵杨

计算机科学 , 2010,
Abstract: A fast method of vehicle logo location was presented,which is based on the symmetrical character in both vehicle body area and vehicle logo area.Firstly,the plate and lamp area was located by vertical interval difference and horizontal maximum local projection,and the rough logo area was given by the restriction of geometric position and size of the vehicle plate,vehicle lamp and vehicle logo area.Secondly,by local symmetrical checking and difference horizontal projection in rough logo area,we got a more ac...
Modified Plane Wave Method Analysis of Dielectric Plasma Photonic Crystal
Li-Mei Qi;Ziqiang Yang
PIER , 2009, DOI: 10.2528/PIER09022605
Abstract: Dispersion characteristics of two types of two-dimension dielectric plasma photonic crystal are studied based on modified plane wave method. Firstly, the eigenvalue equations of TM mode of type-1 and type-2 structures are derived respectively; their dispersion curves are confirmed by the software simulation. Secondly, the influences of normalized plasma frequency, filling factor and relative dielectric constant on photonic band gap, and relative photonic band gap width are analyzed respectively, and some corresponding physical explanations are also given. These results would provide theoretical instructions for designing new photonic crystal devices using plasmadielectric structure.
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