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MATHEMATICAL SIMULATION OF HEAT AND MASS TRANSFER IN PULSED ARC WELDING BY MELTING ELECTRODE

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Acta Metallurgica Sinica(English Letters) 2000年第1期13卷 56-62页

作者： O.I.Shpigunova S. V. Shpigunov Yu.N. Saraev (Institute of Strength Physics and Materials Science, Siberian Branch, Russian Academy of Sciences,Tom- sk, Russia)

In this paper the processes of melting and transfer of an electrode metal to the molten pool, hydrody- namics of molten pool in controlled pulsed arc welding in carbon dioxide have been *** process of pulsed arc welding with systematic short - circuits of the arc gap is realized by adaptive algo- rithms of pulsed control over main energetic parameters of welding - arc current and voltage,arc heated efficiency,peak,short - circuiting current, which provide the dosage of energy for energy for melting and transfer of every for of an electrode metal, the control over fluidity of the weld pool. Physica and mathematical models describing such processes in CO2, origind software hare been *** re- sults of physical simulation and mathemaical modelling permit to determine the influence of energetic parameters of the process on the condition of the 'power source-electrode-arc-molten pool' electrodynamic system at each moment of time.

关键词： pulse arc welding melting of electrode mass transfer

Research on Cross-Cultural Factors for Improving Project Performance in the Multinational Companies of Bangladesh

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Research on Cross-Cultural Factors for Improving Project Per...

作者： Rahman sk Asifur 山东大学

学位级别：硕士

多元文化的作用及其给项目执行带来的新挑战已经通过每个项目的全球存在得到了说明。近十年来,孟加拉国政府支持的报告继续对多元文化项目行业的恶劣表现感到遗憾。人们普遍认为,多元文化产业的文化是影响其绩效的因素之一。分裂、对立... 详细信息

多元文化的作用及其给项目执行带来的新挑战已经通过每个项目的全球存在得到了说明。近十年来,孟加拉国政府支持的报告继续对多元文化项目行业的恶劣表现感到遗憾。人们普遍认为,多元文化产业的文化是影响其绩效的因素之一。分裂、对立、不信任、弱沟通、短期心态、责备文化和随意的招聘方式都是多元文化产业项目文化的共同特征。这些属性会转化为项目结果,如诉讼、健康和安全性能差以及质量差。因此,本研究致力于寻找文化取向与项目绩效结果之间关系的实证证据。本文旨在探讨孟加拉多元文化项目的技巧,以及跨文化因素如何有效地影响多元文化项目。这项研究考察了文化因素的影响,如何帮助改善和可以更有效地在多元文化的项目环境。本文表明,孟加拉国项目组织文化水平较高,衡量文化因素对项目绩效的影响程度较高。在不同的组织类型中,项目经理的权力水平不断提高,对几个文化维度产生了积极的影响,也对项目的绩效产生了直接的影响。采用定量分析方法调查项目联盟中的文化,使用社会认知理论,并将文化描述为跨文化项目组织及其成员在解决问题时所遵循的解决方案的特定配置（以态度、行为和环境表示）项目级。

关键词：绩效管理体系多元文化跨文化动机和概念框架

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水库诱发地震的新模型

世界地震译丛 1991年第6期22卷 45-54,F003页

作者： Saxe.,sk 苏锦星

Comparison between empirical prokinetics, Helicobacter test-and-treat and empirical endoscopy in primary-care patients presenting with dyspepsia: A one-year study

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World Journal of Gastroenterology 2006年第31期12卷 5010-5016页

作者： Wayne HC Hu sk Lam Cindy LK Lam WM Wong KF Lam KC Lai YH Wong Benjamin CY Wong Annie OO Chan CK Chan Gabriel M Leung WM Hui Department of Medicine University of Hong Kong Hong Kong China Department of Statistics and Actuarial Science University of Hong Kong Hong Kong China Department of Community Medicine University of Hong Kong Hong Kong China

瞄准：调查最佳的策略在主要照顾对待消化不良的病人。方法：介绍给主要照顾门诊病人诊所的消化不良的病人随机被分到：(1 ) 实验内视镜检查法，(2 ) H pylori test-and-treat，并且(3 ) 实验专业版有 cisapride 的运动治疗。如果病人们... 详细信息

瞄准：调查最佳的策略在主要照顾对待消化不良的病人。方法：介绍给主要照顾门诊病人诊所的消化不良的病人随机被分到：(1 ) 实验内视镜检查法，(2 ) H pylori test-and-treat，并且(3 ) 实验专业版有 cisapride 的运动治疗。如果病人们在 2 wk 以后仍然保持征兆，早内视镜检查法被安排。症状严厉， quality-of-life (SF-36 ) 以及耐心的偏爱和满足被估计。所有病人由 wk 经历了内视镜检查法 6。病人们被跟随在上面为一年。结果：二百和三十四个病人被招募(163 女、吝啬的年龄 49 ) 。46% 是 H pylori 积极。测试的 26% H pylori 和运动病人显示出的 25% 实验专业版在 wk 的没有改进 2 后续和需要的早内视镜检查法。收到实验 cisapride 的 15% 病人对治疗作出回应很好，但是消化性溃疡是最后的诊断。症状分辨率和 quality-of-life 在这些组之中是类似的。为三策略的费用是每病人的 HK 美元 4343，美元 1771 和美元 1750。66% 病人喜欢有早内视镜检查法。结论：三策略是同等地有效的。实验专业版运动治疗是最不昂贵的，但是消化性溃疡可以与这治疗被错过。H pylori test-and-treat 是最划算的选择。

关键词：幽门螺杆菌内窥镜消化不良实验治疗

Potential of Speciality and Underutilised Grain Species and Pseudocereals for Food Production

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Potential of Speciality and Underutilised Grain Species and ...

第十四届国际谷物科技与面包大会暨国际油料与油脂发展论坛

作者： Regine Schoenlechner Sandor Tmskzi Institute of Food Technology Department of Food Sciences and Technology University of Natural Resou rces and Life SciencesViennaAustria Department of Applied Biochemistry and Food Science Budapest University of Technology and Economics Budapest Hungary

＜正＞In all regions world-wide,cereals and cereal based foods are important staple foods and they are an important contribution to human nutrition and *** can and do contribute a significant amount of healthy food ingredients in the *** active constituents of cereals that promote beneficial physiological effects are especially dietary fibre,certain vitamins like folic acid and secondary plant metabolites like *** recent years the variety of used cereal species has become smaller and ***,more than 86%of the total cereal production is maize （31.3%）,wheat（27.7%） and rice（27%）.Within Europe（EU-25） the production of wheat is even more dominant（47.2%）;production of barley is 21.5%,maize 18.6%,rice only 0.9%（FAOSTAT,2010）.These data show that the use of speciality and underutilised cereals,and pseudocereals is lower than 14%. For nutritional and agricultural reasons this low biodiversity is not very *** minor produced cereal group comprises a large number of（true） cereal species like rye,oat,triticale,millet,sorghum and others,but also pseudocereals like amaranth,quinoa and *** pseudocereals are assigned to the dicotyledonae（unlike cereals,which are monoctyledonae）,but they all produce starch-rich seeds that can be used like *** three pseudocereals show a valuable nutritional composition and interesting functional *** amaranth and quinoa the excellent protein composition with a high amount of essential amino acids and high physiological value has to be pointed *** far as known today,amaranth,quinoa and buckwheat do not contain any prolamins toxic to *** these raw materials can be used for the manufacturing of gluten-free *** the starch granules of both plants are among the smallest known and the amylose content is very low,they show unique physicochemical *** contrast,buckwheat starch is high in *** acid pattern is good for all three pse

关键词： underutilised and specialty cereals pseudocereals processing

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激光治疗脑肿瘤的现状

国外医学（肿瘤学分册） 1992年第6期19卷 359-361页

作者： Powers sk 哈献文

激光显微外科的出现,给神经外科医生提供了一种精确的、止血稳定的神经组织去除方法。新型激光波长为1.32μm和1.44μm的Nd:YAG激光对神经组织的作用可与CO_2激光相媲美。其潜在优势在了波长大于1.3μm的激光提高了水的吸收系数,并可借... 详细信息

激光显微外科的出现,给神经外科医生提供了一种精确的、止血稳定的神经组织去除方法。新型激光波长为1.32μm和1.44μm的Nd:YAG激光对神经组织的作用可与CO_2激光相媲美。其潜在优势在了波长大于1.3μm的激光提高了水的吸收系数,并可借石英光纤输导,使医生的操作更为便利。硫酸钛钾(KTP)激光有如倍频的Nd:YAG,波长为532μm,是Ar^+激光的第二代产品。

关键词：脑肿瘤激光疗法

Healing property of the Piper betel phenol, allylpyrocatechol against indomethacin-induced stomach ulceration and mechanism of action

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World Journal of Gastroenterology 2007年第27期13卷 3705-3713页

作者： S Bhattacharya D Banerjee AK Bauri S Chattopadhyay sk Bandyopadhyay Department of Biochemistry Dr. B.C. Roy Post Graduate Institute of Basic Medical Sciences IPGME&R 244B Acharya Jagadish Chandra Bose Road Kolkata-700020 India Bio-Organic Division Bhabha Atomic Research Centre Mumbai-400085 India

AIM: To evaluate the protective activity of allylpyrocatechol (APC), the major antioxidant constituent of Piper betel, against the indomethacin-induced stomach ulceration in the rat model and correlates with its antioxidative and mucin protecting properties. METHODS: Male Sprague-Dawley rats were divided into five groups. Normal control rats (group Ⅰ) were given the vehicle oral dose of gum acacia in distilled water (1 mL per rat); ulcerated control and treated rats (groups Ⅱ-Ⅴ) were given a single dose of indomethacin (30 mg/kg body wt.); group Ⅱ rats were sacrificed 4 h after indomethacin administration; groups Ⅲ-Ⅴ rats were given the vehicle (1 mL per rat) or APC (2 mg/kg body wt.) or misoprostol (1.43 μg/kg body wt.) once daily by oral intubation for 7 d starting from 4 h after the indomethacin administration. After 7 d, the stomach tissues were excised for histological examination and biochemical analysis. RESULTS: Treatment with APC (2 mg/kg body wt per day) and misoprostol (1.43 μg/kg body wt per day) for 7 d could effectively heal the stomach ulceration as revealed from the ulcer index and histopathological studies. Compared to the zero day ulcerated group, treatment with APC and misoprostol reduced the ulcer index by 93.4% and 85.4% respectively (P < 0.05). Both APC and misoprostol accelerated ulcer healing observed in natural recovery (P < 0.05), their respective healing capacities not being significantly different. The healing capacities of APC and misoprostol could be attributed to their antioxidant activity as well as the ability to enhancethe mucin content of the gastric tissues. Compared to the ulcerated untreated rats, those treated with APC and misoprostol showed near normal MDA levels, while the protein levels were 86% and 78% of the normal value respectively (P < 0.05). Likewise, both APC and misoprostol increased the SOD, catalase, and mucin levels significantly (P < 0.05), the effect of APC being better. CONCLUSION: APC can protect indomethacin-

关键词：抗氧剂胃溃疡组织病理学说粘液素