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Indication to distinguish the burst region of coal gas from seismic data

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Journal of Coal Science & Engineering(China) 2009年第3期15卷 243-247页

作者： CHENG Jian-yuan TANG Hong-wei xu Lin LI yan-fang Xi＇an Research Institute China Coal Research Institute Xi＇an 710054 China

The velocity of an over-burst coal seam based on laboratory test results. This seam is about 1/3 compared to a normal coal can be considered as a basis to confirm the area of coal and gas burst by seismic exploration technique. Similarly, the simulation result of the theoretical seismic model shows that there is obvious distinction between over-burst coal and normal coal based on the coal reflection＇s travel-time, energy and frequency. The results from the actual seismic data acquired in the coal and gas over-burst cases is consistent with that of the laboratory and seismic modeling; that is, in the coal and gas burst region, seismic reflection travel time is delayed, seismic amplitude is weakened and seismic frequency is reduced. Therefore, it can be concluded that seismic exploration tech- nique is promising for use in distinguishing coal and gas over-burst regions based on the variation of seismic reflection travel time, amplitude and frequency.

关键词： coal and gas over-burst region seismic data characteristic identification

Separation of protactinium in the reaction of 60MeV/nucleon ^(18)O ions with natural uranium

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Nuclear Science and Techniques 2002年第2期13卷 119-124页

作者： yanG Wei-Fan, YUAN Shuang-Gui, XIAO Yong-Hou, xu yan-Bing, fang Ke-Ming (Institute of Modern Physics, the Chinese Academy of Sciences, Lanzhou 730000) Institute of Modern Physics the Chinese Academy of Sciences Lanzhou 730000

The activities of protactinium were produced by the multi-nucleontransfer reactions in bombardment of the natural uranium with 60 MeV/nucleon 1sOions. A simple, relatively fast radiochemical procedure was used for extraction sep-aration of protactinium from the uranium and a variety of reaction products using1-phenyl-3-methyl-4-benzoyl-5-pyrazolone and tri-iso-octylamine as extractants. Theγ ray spectrum of the separated protactinium fractions showed that the protactiniumcould be separated from all of the main impurity elements. The decontaminationfactors of the uranium and the main reaction products produced in the reaction aregiven.

关键词：镤 PMBP提取天然铀

Distribution of cagG gene in Helicobacter pylori isolates from Chinese patients with different gastroduodenal diseases and its clinical and pathological significance

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World Journal of Gastroenterology 2003年第10期9卷 2258-2260页

作者： Can xu Zhao-Shen Li Zhen-Xing Tu Guo-Ming xu yan-fang Gong Xiao-Hua Man, Department of Gastroenterology, Changhai Hospital, Second Military Medical University, Shanghai 200433, China Department of Gastroenterology Changhai Hospital Second Military Medical University Shanghai 200433 China. xucan9@***

AIM: To determine the distribution of cagG gene of Helicobacter pylori(Hpylori) isolates cultured from patients with various digestive diseases and its relationship with gastroduodenal ***: cagG was amplified by polymerase chain reaction in 145 H pylori isolates cultured from patients with chronic gastritis (n=72), duodenal ulcer (n=48), gastric ulcer (n=17), or gastric and duodenal ulcer (n=8), and the relationship between cagGstatus and the grade of gastric mucosal inflammation was ***: cagG was present in 91.7% of the 145 H pylori isolates, with the rates were 90.3%, 93.8%, 88.2% and 100.0%, respectively, in those from patients with chronic gastritis, duodenal ulcer, gastric ulcer, and gastric and duodenal ulcer. There was no significant difference among the four groups (P＞0.05). The average grade of gastric mucosal inflammation in the antrum and corpus was 1.819±0.325and 1.768±0.312, respectively in cagG positive patients,whereas the average inflammation grade was 1.649±0.297,1.598±0.278 respectively in cagG negative cases (P＞0.05).CONCLUSION: cagG gene of H pylori was quite conservative,and most H pylori strains in Chinese patients were cagG *** status was not related to clinical outcome or the degree of gastric mucosal inflammation. Therefore, cagG can notbe used as a single marker for discrimination of H pylori strains with respect to a specific digestive disease.

关键词： cagG基因幽门螺杆菌胃十二指肠疾病临床意义病理特点

Anti-diabetic effects of cinnamaldehyde and berberine and their impacts on retinol-binding protein 4 expression in rats with type 2 diabetes mellitus

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Chinese Medical Journal 2008年第21期121卷 2124-2128页

作者： ZHANG Wei xu yan-cheng GUO fang-jian MENG Ye LI Ming-li Department of Endocrinology Zhongnan Hospital ot Wunan University Wuhan Hubei 430071 China

Background Retinol binding protein 4 （RBP4）, as an adipocyte secreted cytokine, was recently found to be inversely correlated with expression of glucose transporter 4 （GLUT4） in insulin resistance （IR） state and to have an intimate relationship with IR and type 2 diabetes mellitus （T2DM）. The present study aimed to evaluate the anti-diabetic efficacy of cinnamaldehyde （Cin）, berberine （Ber）, and metformin （Met） as well as their impacts on the RBP4-GLUT4 system. Methods Rat models of T2DM were established by combination of intraperitoneal injection of low-dose streptozotocin and high fat diet induction. Rats were divided into five groups： the control group, the diabetes group, the diabetes＋Ber group, the diabetes＋Cin group, and the diabetes＋Met group. Western blotting was used to detect the serum or tissue RBP4 and GLUT4 protein levels. Results After treatment for four weeks, both Cin and Ber displayed significant hypolipidemic, hypoglycemic, and insulin sensitizing functions （P 〈0.01） compared with the control group. Their effects on lowering fasting plasma glucose （FPG）, low density lipoprotein-cholesterol （LDL-C） and homeostasis model assessment of insulin resistance （HOMA-IR） seem even better than that of Met. Cin and Ber markedly lowered serum RBP4 levels and up-regulated the expression of tissue GLUT4 protein, and Cin seemed more notable in affecting these two proteins. Conclusions Both Cin and Ber display an exciting anti-diabetic efficacy in this study and may be of great value for the treatment of type 2 diabetes. Their mechanisms involve the RBP4-GLUT4 system, during which the serum RBP4 levels are lowered and the expression of tissue GLUT4 protein is up-regulated.

关键词： cinnamaldehyde berberine type 2 diabetes meUitus insulin resistance retinol binding protein 4 glucose transporter 4

私募资本、不完全合约与控制权配置——基于蒙牛乳业的案例研究

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经济理论与经济管理 2010年第4期30卷 68-73页

作者：许艳芳中国人民大学商学院北京100872

控制权配置是私募资本融资中的一个核心问题。利用不完全合约融资理论,本文以蒙牛乳业为研究对象,对我国民营企业引入私募资本融资中的控制权配置问题进行了分析。研究发现,从单次融资的角度看,在私募资本融资中,企业家人力资本不仅直... 详细信息

控制权配置是私募资本融资中的一个核心问题。利用不完全合约融资理论,本文以蒙牛乳业为研究对象,对我国民营企业引入私募资本融资中的控制权配置问题进行了分析。研究发现,从单次融资的角度看,在私募资本融资中,企业家人力资本不仅直接影响控制权的初始配置,而且间接影响后期公司控制权的相机配置。从不同融资阶段的角度看,随着企业家人力资本逐渐外化,相对于前轮融资,私募基金在后轮融资中掌握更少的控制权,而企业家掌握更多的控制权。本文的研究结论有助于加深学术界对私募资本控制权配置影响因素及其变迁过程的理解。

关键词：私募资本不完全合约融资合约理论控制权配置

基于社会资本视角的民营上市公司非公开发行动因研究——相关证据及理论框架

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经济理论与经济管理 2011年第9期31卷 102-109页

作者：许艳芳王艳中国人民大学商学院北京100872 首都经贸大学保险学院北京100029

本文从社会资本的视角,研究了民营上市公司非公开发行的动因。通过案例研究,笔者提供的证据表明,非公开发行不仅是民营上市公司的一种融资手段,而且是获得社会资本的重要途径。以相关证据为基础,笔者从社会资本视角构建了民营上市公司... 详细信息

本文从社会资本的视角,研究了民营上市公司非公开发行的动因。通过案例研究,笔者提供的证据表明,非公开发行不仅是民营上市公司的一种融资手段,而且是获得社会资本的重要途径。以相关证据为基础,笔者从社会资本视角构建了民营上市公司非公开发行动因的理论框架。本文的研究结论不仅对理论界从新的角度理解民营上市公司非公开发行的动因有重要启示,而且对民营上市公司采用非公开发行筹资实践有一定的借鉴作用。

关键词：非公开发行民营上市公司社会资本理论框架

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论区域文化产业发展比较优势的实现

齐鲁学刊 2010年第3期 83-86页

作者：徐艳芳济南大学历史与文化产业学院山东济南250022

区域文化产业发展的比较优势是指在区域文化产业发展过程中,特定的区域和其他区域相比较在文化资源、产业基础、技术支撑、市场环境、以及政策等方面所表现出来的有利的条件、因素和活动过程。在区域文化产业发展的潜在比较优势转变为... 详细信息

区域文化产业发展的比较优势是指在区域文化产业发展过程中,特定的区域和其他区域相比较在文化资源、产业基础、技术支撑、市场环境、以及政策等方面所表现出来的有利的条件、因素和活动过程。在区域文化产业发展的潜在比较优势转变为现实优势的机制中,文化产业资源的开发、技术创新和市场开发是最关键的环节。只有充分发挥各个环节和因素的比较优势,区域文化产业发展的综合比较优势才能得以实现。

关键词：区域文化产业比较优势实现机制文化产业资源市场需求

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数字影像输出设备色域边界的插值计算方法

光学精密工程 2006年第2期14卷 261-265页

作者：徐艳芳刘文耀北京印刷学院印刷与包装工程学院北京102600 天津大学光电信息技术科学教育部重点实验室天津300072

提出了一种数字影像输出设备色域边界的插值计算方法,并对其精度进行了实验分析。基于CIELAB色空间中色域的连通性和三角形插值技术,该方法直接在CIELABL*a*b*坐标中进行插值计算,得到有规律变化的色域边界点。对3个不同类型的输出设备... 详细信息

提出了一种数字影像输出设备色域边界的插值计算方法,并对其精度进行了实验分析。基于CIELAB色空间中色域的连通性和三角形插值技术,该方法直接在CIELABL*a*b*坐标中进行插值计算,得到有规律变化的色域边界点。对3个不同类型的输出设备进行了精度分析,采用386个采样点确定色域边界,296个检验点的色度值与实际输出色度值CIELAB色差ΔEab的平均值/最大值分别为2.31/6.93、2.03/6.70和0.40/2.11,接近于各自设备机械稳定性引起的色差。此外,将色域表面映射为色域球,在色域球上进行插值三角形的预查找,使得插值三角形的确定时间由2.5 min缩短到10 s,降低了15倍。

关键词：色域色域边界色域球三角形插值

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试论钱基博与张舜徽的学术精神

江淮论坛 2008年第6期 89-94,26页

作者：徐艳芳华中师范大学文献所湖北武汉430079

钱基博、张舜徽先生"辨章学术,考镜源流"、"循序渐进,博学通贯"的学术精神和学术境界,是他们成为一代国学大师和学术丰碑的根本原因。在学界存在急功近利、学风浮躁现象的今天,探讨这种学术精神、学术境界,对于学人读书治学,尤其是研治... 详细信息

钱基博、张舜徽先生"辨章学术,考镜源流"、"循序渐进,博学通贯"的学术精神和学术境界,是他们成为一代国学大师和学术丰碑的根本原因。在学界存在急功近利、学风浮躁现象的今天,探讨这种学术精神、学术境界,对于学人读书治学,尤其是研治、弘扬国学,具有一定的启迪和借鉴意义。

关键词：钱基博张舜徽国学辨章学术考镜源流循序渐进博学通贯