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International Journal of Minerals,Metallurgy and Materials 2015年第5期22卷 543-548页

作者： Li-ping Wang xu-dong xu Jia-xing Wang Department of Materials Physics and Chemistry School of Materials Science and Engineering University of Science and Technology Beijing

Oil-soluble In2O3 nanoparticles and In2O3-SnO2 nanocomposites were prepared in oleylamine via decomposition of metal acety- lacetonate precursors. Thin films of In2O3 and In2O3-SnO2 were obtained by spin-coating solutions of the oil-soluble In2O3 nanoparticles and In2O3-SnO2 nanocomposites onto substrates and then calcining them. Transmission electron microspectroscopy, scanning electron mi- crospectroscopy, atomic force microspectroscopy, X-ray diffraction, ultraviolet-visible absorption, and photoluminescence spectroscopy were used to investigate the properties of the nanoparticles and thin films. The In2O3 nanoparticles were cubic-phased spheres with a diame- ter of-8 nm; their spectra exhibited a broad emission peak centered at 348 nm. The In2O3-SnO2 nanocomposites were co-particles composed of smaller In2O3 particles and larger SnO2 particles; their spectra exhibited a broad emission peak at 355 nm. After the In2O3-SnO2 nano- composites were calcined at 400℃, the obtained thin films were highly transparent and conductive, with a thickness of 30-40 nm; the sur- faces of the thin films were smooth and crack-free.

关键词： indium trioxide tin dioxide nanoparficles nanocomposites thin films calcination

Dynamic Recrystallization Behavior in Mn-Cr Gear Steel

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Journal of Iron and Steel Research International 2006年第2期13卷 49-53页

作者： WANG Bing-xin xu xu-dong LIU Xiang-hua WANG Guo-dong Department of Mechanical Engineering Liaoning University of Petroleum and Chemical Technology Fushun 113001 Liaoning China State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110004 Liaoning China

Using a Gleeble 1500 hot simulator, the dynamic recrystallization （DRX） behavior of Mn-Cr type gear steel was investigated. The experimental results show that the Mn-Cr gear steel exhibits a typical DRX behavior at higher deformation temperature, lower strain rate and smaller initial austenite grain size. The DRX takes place under the conditions that Zener-Hollomon parameter （Z） is less than a critical value Zc. The DXR grains are formed by the bulging mechanism. Activation energy and stress exponent were calculated to be 378.6 kJ · mol^-1 and 5.8 respectively by regression analysis.

关键词： gear steel deformation condition dynamic recrystallization

Effect of Austenite Deformation on Continuous Cooling Transformation Microstructures for 22CrSH Gear Steel

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Journal of Iron and Steel Research International 2007年第1期14卷 69-73页

作者： WANG Bing-xin JIANG Ying-tian xu xu-dong LIU Xiang-hua WANG Guo-dong College of Mechanical Engineering Liaoning University of Petroleum and Chemical Technology Fushun 113001 Liaoning China State Key Lab of Technology and Automation Northeastern University Shenyang 110004 Liaoning China

The effect of compressive deformation of austenite on continuous cooling transformation microstructures for 22CrSH gear steel has been investigated using a Gleeble 1500 thermal simulator. The experimental results show that the deformation of austenite promotes the formation of proeutectoid ferrite and pearlite, and leads to the increase of critical cooling rate of proeutectoid ferrite plus pearlite microstructure. The grain boundary allotriomorphic ferrite occupies the austenite grain surfaces when the prior deformation takes place or the cooling rate is decreased, which causes a transition from bainite to acicular ferrite. The deformation enhances the stability of transformation from austenite to acicular ferrite, which results in an increase of M/A constituent.

关键词： gear steel prior compressive deformation austenite transformation microstructure

Research on Flange Spread of H-Beamon Universal Mill

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Journal of Iron and Steel Research International 2006年第1期13卷 27-30,39页

作者： xu xu-dong BAI Jin-lan WANG Bing-xin LIU Xiang-hua WU Di State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110004 Liaoning China

The deformation process of H-beams was simulated by explicit dynamic FEM, and the influence of deformation parameters on the spread of rolling piece was obtained. The results show that the flange width, elongation ratio between flange and web and flange thickness are the maior influencing factors on the spread of rolling piece, and the inclination and diameter of vertical roll together with web inner width can also influence to some extent on the spread of rolling piece.

关键词： H-beam FEM spread

A new cassane diterpenoid lactone from the seed of Caesalpinia minax

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Chinese Chemical Letters 2009年第4期20卷 444-446页

作者： Yan Cheng Li Yan Ma Jian Hua Miao xu dong xu Jing Quan Yuan Jun Shan Yang Institute of Medicinal Plant Development Peking Union Medical College and Chinese Academy of Medical Sciences Beijing 100193 People's Republic of China Guangxi Botanical Garden of Medical Plant Nanning 530023 People's Republic of China

A new cassane diterpenoid lactone was isolated from the seed of Caesalpinia minax. On the basis of spectral evidences, its structure was established as 12α-methoxyl, 5α, 14β-dihydroxy-1α, 6α, 7β-triacetoxycass-1... 详细信息

关键词： Caesalpinia Caesalpinia minax Cassane diterpenoid lactone

A new Kaurane Derivative from Aralia Fargesii

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Chinese Chemical Letters 1999年第8期10卷 673-674页

作者： Yu Mei ZHANG Jun Shan YANG xu dong xu (Institute of Medicinal Plant Development, Chinese Academy of Medical Science Peking Union Medical College, Beijing 100094) Inst. of Medicinal Plant Development Chinese Academy of Medical Science Peking Union Medical College Beijing 100094 China

A new ent-kaurane diterpene was isolated from the rhizome of Aralia fargesii. On the basis of chemical and spectral evidences, its structure was established as 16 alpha-hydroxy-17-isovaleroyloxy-ent-kauran-19-oic acid.

关键词： Aralia fargesii ent-kaurane 16 alpha-hydroxy-17-isovaleroyloxy-ent-kauran-19-oic acid

盐胁迫对于聚球藻PCC 7942大片段DNA删除突变株的生理效应

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水生生物学报 2022年第4期46卷 592-597页

作者：许轶徐旭东中国科学院水生生物研究所武汉430072 中国科学院大学北京100049

在对聚球藻PCC 7942开展基因组简化的过程中,发现一些非必需大片段的删除可导致耐盐胁迫能力降低。突变株ΔSynpcc7942_0233-0253和ΔSynpcc7942_2169-2187,其基因组中分别删除了18和14 kb的区域,在BG11培养液中的生长与野生型没有显著... 详细信息

在对聚球藻PCC 7942开展基因组简化的过程中,发现一些非必需大片段的删除可导致耐盐胁迫能力降低。突变株ΔSynpcc7942_0233-0253和ΔSynpcc7942_2169-2187,其基因组中分别删除了18和14 kb的区域,在BG11培养液中的生长与野生型没有显著差异,但在含有0.4 mol/L NaCl的培养液中的生长相对于野生型被严重抑制。进一步分析发现,在盐胁迫下2个突变株的光合放氧速率比野生型显著下降,光系统Ⅰ和Ⅱ电子传递速率均低于野生型,呼吸耗氧速率与野生型相比却维持在较高水平。这些结果说明,蓝藻基因组中有些非必需基因实际上对于适应胁迫条件是需要的。

关键词：聚球藻PCC 7942 大片段删除突变株盐胁迫光合作用

同方期刊数据库博看期刊评论

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基于小波矩不变量的模式识别方法

红外与毫米波学报 2000年第3期19卷 215-218页

作者：徐旭东周源华上海交通大学图像通信和信息处理研究所上海200030

为了得到一组局部最优的特征组 ,提出一种结合分散度和顺序前进法 (SFS)的特征选择方法 .实验结果表明小波矩不变量比 Zernike矩不变量有更好的识别效果 ,尤其对于形体相似的物体。

关键词：矩不变量小波矩不变量特征选择 SFS 模式识别

The effect of different methods of hypoglycemic on the process of early diabetic nephropathy

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The effect of different methods of hypoglycemic on the proce...

Chylous Ascites and Chylothorax Caused by Constrictive Pericarditis

中华医学会糖尿病学分会第十六次全国学术会议

作者： HE Hai-dong xu xu-dong YU Chen Department of Nephrology Minhang District Central Hospital

Objective To compare the efficacy of different methods of hypoglycemic on the process in the early stage of diabetic nephropathy,evaluate the preventive and therapeutic effect of insulin therapy on disease progression. Methods One hundred and twenty-eight patients with diabetic nephropathy whose glomerular filtration

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Chinese Medical Journal 2017年第20期130卷 2508-2509页

作者： Guo-Can Yu xu-dong xu Fang-Ming Zhong Gang Chen Da Chen Department of Thoracic Surgery Zhejiang Traditional Chinese Medicine and Western Medicine Integrated Hospital Hangzhou Zhejiang 310003 China

Chylous ascites and chylopleura due to constrictive pericarditis are rare and characterized by white milky ascites and pleural fluid. presence of chylomicrons Diagnosis is established by the However, the treatment of this situation is very difficult. We report a case ofchylous ascites and chylotborax, in which hydrops was attributable to constrictive pericarditis. In the present case, pericardiectomy combined with thoracic duct ligation and pleurodesis cured chylous ascites and cbylothorax caused by constrictive pericarditis, which has never been previously described.

关键词： Ascites Chylothorax Clinical Experience Constrictive Pericarditis