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Search Results: 1 - 10 of 54668 matches for " Shou-Wen Jin "
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7-[4-(5,7-Dimethyl-1,8-naphthyridin-2-yloxy)phenoxy]-2,4-dimethyl-1,8-naphthyridine methanol disolvate
Shou-Wen Jin,Da-Qi Wang,Yun Chen
Acta Crystallographica Section E , 2008, DOI: 10.1107/s160053680706549x
Abstract: The title compound, C26H22N4O2·2CH3OH, was synthesized and characterized by 1H NMR spectroscopy and X-ray structure analysis. There is one half-molecule in the asymmetric unit with a centre of symmetry located at the centre of the benzene ring. The two bridged naphthyridine ring systems are in an antiparallel orientation. In the crystal structure, O—H...N, C—H...O and C—H...N interactions define the packing.
Xing-Jun Gao,Shou-Wen Jin,Yan-Fei Huang,Yong Zhou
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812040123
Abstract: The r.m.s. deviation from the mean plane for the non-H atoms in the title compound, C7H5BrN2S, is 0.011 . In the crystal, the molecules are linked by N—H...N and N—H...Br hydrogen bonds to generate (010) sheets. Weak aromatic π–π stacking [centroid-to-centroid separation = 3.884 (10) ] and possible C—H...Br interactions are also observed. The crystal studied was found to be an inversion twin.
Bis(2-methyl-1H-benzimidazol-3-ium) naphthalene-1,5-disulfonate
Shuai-Shuai Wei,Shou-Wen Jin,Qiong Dong,Xin-Chao Cao
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812039396
Abstract: The asymmetric unit of the title compound, 2C8H9N2+·C10H6O6S22 , contains a 2-methylbenzimidazolium cation and one half of a naphthalene-1,5-disulfonate anion. The formula unit is generated by an inversion center. In the crystal, N—H...O hydrogen bonds link the components into chains along [001]. In addition, weak C—H...O hydrogen bonds and weak C—H...π interactions are observed. The methyl H atoms were refined as disordered over two sets of sites with equal occupancy.
Oxonium picrate
Shou-Wen Jin,Bing-Xia Chen,Yu-Shuang Ge,Hua-Bing Yin
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811022574
Abstract: The title compound, H3O+·C6H2N3O7 , consists of one picrate anion and one oxonium cation. The oxonium cation is located on a crystallographic twofold axis and both its H atoms are disordered, each over two symmetry-equivalent positions with occupancy ratios of 0.75. The picrate anions are also located on twofold axes bisecting the phenolate and p-nitro groups. π–π interactions between the rings of the picrates [centroid-to-centroid distances of 3.324 (2) ] connect the anions to form stacks along the a-axis direction. The stacks are further joined together by the protonated water molecules through hydrogen bonds to form two-dimensional sheets extending parallel to the ab plane. The sheets are stacked on top of each other along the c-axis direction and connected through C—H...O interactions between the CH groups of the benzene rings and the picrate nitro groups, with C...O distances of 3.450 (2) .
Shou-Wen Jin,Qi-Jun Zhao,Xian-Gang Qian,Ru-Xiang Chen
Acta Crystallographica Section E , 2008, DOI: 10.1107/s160053680706271x
Abstract: In the title compound, [Cd(NO3)2(C10H11N3)2], two naphthyridine ring systems are coordinated to the Cd ion through the two N atoms in a bidentate chelating mode, whereas the remaining coordination sites are occupied by two O atoms from two different nitrate groups to complete the octahedral geometry. Intermoleular N—H...O hydrogen bonds link the molecules to form a one-dimensionnal sheet parallel to the ac plane. Weak slipped π–π stacking involving the naphthyridine ring systems stabilizes the structure.
Study on the response of a multicomponent induction logging tool in deviated and layered anisotropic formations by using numerical mode matching method

WANG Hong-Nian,TAO Hong-Gen,YAO Jing-Jin,CHEN Gui-Bo,YANG Shou-Wen,

地球物理学报 , 2008,
Abstract: 利用数值模式匹配技术,研究并建立层状各向异性倾斜地层中多分量感应测井响应的快速数值模拟算法.首先将位于井轴上的三个相互正交磁偶极子转化成关于极角θ的三个谐变分量的叠加,以便将三个正交磁偶极子电磁场的正演问题完全简化成三个谐变分量电磁场的轴对称定解问题,并给出电磁场各个谐变分量在井轴上满足的边界条件,保证电磁场在井轴附近仍然可解.然后利用数值模式匹配技术建立电磁场各个谐变分量的正演过程,得到层状各向异性地层中磁流源并矢Green函数的半解析表达式,给出计算层状各向异性倾斜地层中多分量感应测井响应的具体方法,最后通过数值计算结果证明该算法的有效性并考察几种不同情况下多分量感应测井响应特征.
Photo-temperature response of ramie (Boehmeria nivea (L.) Gaud.) male sterile lines  [PDF]
Fei-Hu Liu, Hai-Quan Huang, Shou-Wen Zhang, Xue-Ni Liang
Agricultural Sciences (AS) , 2011, DOI: 10.4236/as.2011.22016
Abstract: Six male sterile lines (MSLs) of ramie (Boeh-meria nivea (L.) Gaud.) were grown in dark rooms under the photoperiods of 9.5h, 11h or 12.5h d-1 in spring and summer seasons (dif-ferent environmental temperatures) to test their developmental response to photoperiod and temperature. The MSLs showed little difference in vegetative growth duration, but different de-velopment rates in the reproductive growth stage under the tested conditions. Higher tem-perature (grown in summer) mainly accelerated vegetative growth, while the short photoperiod treatment accelerated the reproductive growth of the MSLs. Moreover, the short photoperiod treatment combined with higher temperature obviously accelerated both the vegetative and reproductive growth of the MSLs. But the effect of higher temperature decreased, or even dis-appeared along with the photoperiod elongation. The MSLs were divided into 5 photo-temperature response types, based on the flower budding acceleration of short pho-toperiod and the approximate temperature re-sponse index.
Parameterized inversion of frequency sounding data in horizontally stratified transverse isotropic medium

Zhou Jian-Mei,Wang Hong-Nian,Yao Jing-Jin,Yang Shou-Wen,Ma Yin-Zhi,

物理学报 , 2012,
Abstract: In this paper,we advance a fast iterative inversion algorithm of frequency electromagnetic sounding data to simultaneously reconstruct the horizontal and the vertical conductivities and interface each bed in the horizontally stratified transversely isotropic(TI) medium.First,applying the analytic expression of the electromagnetic dyadic Green’s functions in the TI medium,we realize the forward modeling of the frequency sounding via the fast algorithm of Sommerfeld integral.Then using the perturbation principles and Fourier inversion transform,we establish an efficient computation of Frechet derivatives of the frequency sounding data with respective to all the model parameters.And we use the least square criterion,the normalization and singular value decomposition to iteratively recovery all model parameters.Finally,numerical results validate the inversion algorithms and their antinoise ability.
An efficient algorithm of the electromagnetic dyadic green''''s function in a horizontal-layered anisotropic medium

Chen Gui-Bo,Wang Hong-Nian,Yao Jing-Jin,Han Zi-Ye,Yang Shou-Wen,

物理学报 , 2009,
Abstract: 利用高阶窗函数结合连分式展开等技术研究并建立一种水平层状各向异性介质中电磁场并矢Green函数的快速有效算法. 首先借助于高阶窗函数将构成并矢Green函数的Sommerfeld积分转化成广义快速下降路径上积分,并给出高阶窗函数Hankel变换的一种新的更高阶幂级数展开式以及严格的Lommel函数表达式,以满足在全空间上高精度计算并矢Green函数的要求. 在此基础上,用Bessel函数的零点将积分路径划分成一系列小区间并通过改进的自适应Gauss求积公式确定各个小区间上的积分值,然后引入连分式展开法对各个区间上的积分值求和,从而使整个积分的收敛效率得到大大提高. 最后通过数值结果验证本方法的有效性.
Modeling of electromagnetic responses of 3-D electrical anomalous body in a layered anisotropic earth using integral equations

CHEN Gui-Bo,WANG Hong-Nian,YAO Jing-Jin,YANG Shou-Wen,

地球物理学报 , 2009,
Abstract: 本文研究并建立了一种模拟各向异性地层中三维电性异常体电磁响应的积分方程算法.首先讨论了并矢Green函数及其相关积分的计算,将水平层状各向异性地层中的电场并矢Green函数分解成含有奇异项的直达波与非奇异的来自各个层界面的反射和透射波两个部分,再应用等效体积单元和表面积分技术对积分方程的奇异核进行离散化处理以便提高离散方程的精度.然后为了节省计算机内存以及计算时间,引入基于Krylov子空间的迭代算法求解积分方程的离散化矩阵方程.最后通过与现有文献中的结果作对比从而检验了所述算法的有效性,并结合具体算例考察分析了地层的各向异性对三维电性异常体电磁响应的影响特征和规律.
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