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Physical Properties and Regulating Mechanism of Fluoride-Free and Harmless B_2O_3-Containing Mould Flux

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Journal of Iron and Steel Research International 2007年第1期14卷 25-28页

作者： li Gui-rong WANG Hong-ming DAI Qi-xun ZHAO Yu-tao li Jing-sheng School of Materials Science and Engineering Jiangsu University Zhenjiang 212013 Jiangsu China

The flux agents in common mould fluxes were fluoride and sodium oxide, which would do great harm to environments. B2O3 was selected as flux. The physical properties of B2O3-containing mould fluxes were studied. The corresponding physical properties of 37. 91% CAO-43.09% SiO2-5% Al2O3-5% MgO-2% li20-7% B2O3 mould fluxes were as follows： the melting point was 909℃, the flowing temperature was 1 160℃, the viscosity and surface tension at 1300 ℃ were 0. 4 Pa · s and 0.32 N/m respectively, which could meet the demands for certain kinds of steels for mould fluxes in continuous casting.

关键词： B2O3 -containing mould flux fluoride-free flux harmless flux physical property

Endoscopic papillary balloon intermittent dilatation and endoscopic sphincterotomy for bile duct stones

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World Journal of Gastroenterology 2013年第15期19卷 2425-2432页

作者： Bai-Qing Fu Ya-Ping Xu li-sheng tao Jun Yao Chun-Suo Zhou Department of Gastroenterology the People's HospitalAffiliated to Jiangsu University

AIM: To compare the effectiveness and safety of endoscopic papillary balloon intermittent dilatation (EPBID) and endoscopic sphincterotomy (EST) in the treatment of common bile duct stones. METHODS: From March 2011 to May 2012, endoscopic retrograde cholangiopancreatography was performed in 560 patients, 262 with common bile duct stones. A total of 206 patients with common bile duct stones were enrolled in the study and randomized to receive either EPBID with a 10-12 mm dilated balloon or EST (103 patients in each group). For both groups a conventional reticular basket or balloon was used to remove the stones. After the procedure, routine endoscopic nasobiliary drainage was performed. RESULTS: First-time stone removal was successfully performed in 94 patients in the EPBID group (91.3%) and 75 patients in the EST group (72.8%). There was no statistically significant difference in terms of operation time between the two groups. The overall incidence of early complications in the EPBID and EST groups was 2.9% and 13.6%, respectively, with no deaths reported during the course of the study and follow-up. Multiple regression analysis showed that the success rate of stone removal was associated with stone removal method [odds ratio (OR): 5.35; 95%CI: 2.24-12.77; P=0.00], the transverse diameter of the stone (OR: 2.63; 95%CI: 1.19-5.80; P=0.02) and the presence or absence of diverticulum (OR: 2.35; 95%CI: 1.03-5.37; P=0.04). Postoperative pancreatitis was associated with the EST method of stone removal (OR: 5.00; 95%CI: 1.23-20.28; P=0.02) and whether or not pancreatography was performed (OR: 0.10; 95%CI: 0.03-0.35; P=0.00). CONCLUSION: The EPBID group had a higher success rate of stone removal with a lower incidence of pancreatitis compared with the EST group.

关键词： Endoscopic papillary balloon dilatation Endoscopic retrograde cholangiopancreatography Endoscopic sphincterotomy Common bile duct stones Success rate

FXR agonist GW4064 alleviates endotoxin-induced hepatic inflammation by repressing macrophage activation

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World Journal of Gastroenterology 2014年第39期20卷 14430-14441页

作者： Jun Yao Chun-Suo Zhou Xiong Ma Bai-Qing Fu li-sheng tao Miao Chen Ya-Ping Xu Department of Gastroenterology the People’s Hospital Affiliated to Jiangsu University Department of Gastroenterology Renji Hospital Shanghai Jiao Tong University School of Medicine Department of Pathology the Zhenjiang First People’s Hospital

AIM: To examine the effect of farnesoid X receptor (FXR) activation by GW4064 on endotoxin-induced hepatic inflammation in nonalcoholic fatty liver disease (NAFLD) and the underlying mechanism.

关键词： Farnesoid X receptor Nonalcoholic fatty liver disease GW4064 Nonalcoholic fatty liver disease activity score lipopolysaccharide-induced hepatic inflammation Macrophage activation

CA Investment Casting Process of Complex Castings

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厦门大学学报（自然科学版） 2002年第S1期41卷 17-18页

作者： WU Jian-tao, FENG Di, XIE Yun-peng, li Jun-tao, KONG sheng-guo (Superalloy Institute of Central Iron & Steel Institute, Beijing 100081, China)

CA (Computer aided) investment casting technique used in superalloy castings of aerospace engine parts was presented. CA investment casting integrated computer application, RP (Rapid Prototyping) process, solidification simulation and investment casting process. It broke the bottle neck of making metal die. Solid model of complex parts were produced by UGII or other software, then translated into STL(Stereolithography) file, after RP process of SLS(Selective Laser Sintering), wax pattern used in investment casting can be acquired without metal die in short time. These can reduce period and cost greatly of complex superalloy parts development of engine. The key processes of CA investment casting were discussed. The accuracy of model translation should match that of RP system. Choice of RP material, surface polishing, sintering parameter plays important role in RP process. Other processes, like solidification simulating and optimization of gate system were introduced. The conclusion was that complex parts can be produced by CA investment casting with lots of advantages. The accuracy of castings can reach CT5～7,and the smoothness can get Ra3～13 mm. These parts of engines worked well.

关键词： CA investment casting RP solidification simulation complex parts of engine

空间电子辐射环境中绝缘介质电荷沉积特性及陷阱参数研究综述

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物理学报 2019年第23期68卷 10-18页

作者：李国倡李盛涛青岛科技大学先进电工材料研究院青岛266042 西安交通大学电力设备电气绝缘国家重点实验室西安710049

空间电子辐射环境中绝缘介质充放电特性与介质表面电荷交换过程或内部电荷迁移过程密切相关.介质表面/内部电荷运动很大程度上取决于材料的微观特性,空间电荷与陷阱是反映绝缘介质微观特性的重要参数.本文综述了电子辐射环境中绝缘介质... 详细信息

空间电子辐射环境中绝缘介质充放电特性与介质表面电荷交换过程或内部电荷迁移过程密切相关.介质表面/内部电荷运动很大程度上取决于材料的微观特性,空间电荷与陷阱是反映绝缘介质微观特性的重要参数.本文综述了电子辐射环境中绝缘介质内部空间电荷和陷阱的形成、作用机理、测量方法、存在的问题及国内外研究现状.首先,简要介绍了入射电子与介质材料的相互作用机理及沉积电荷的形成;分析了电子束辐射下介质内部电荷迁移模型,辐射诱导电导模型(RIC模型)和电子-空穴对的产生/复合模型(GR模型)的优缺点;对比分析了经典电声脉冲法(PEA)以及适用于电子束辐射下空间电荷测量的"短路PEA"和"开路PEA",并总结了电子辐射下PEA装置设计中存在的主要技术难点;其次,简要介绍了电子束辐射下陷阱的形成及作用机理,分析了聚合物介质陷阱参数的提取方法,如热刺激电流法、表面电位衰减法(电晕注入方式或电子辐射方式)、空间电荷衰减法,指出在同一真空环境中完成电子注入和表面电位测量的方法较适合空间介质材料陷阱参数的表征,并以聚酰亚胺为例,进行了陷阱参数提取;最后,从理论模型、参数表征和测量技术等方面,展望了空间绝缘介质亟需解决的科学问题.

关键词：空间辐射环境空间电荷特性陷阱分布电声脉冲法

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核燃料的燃耗测量方法综述

核电子学与探测技术 2005年第6期25卷 852-857页

作者：李桃生方栋清华大学核能与新能源技术研究院北京100084

介绍了非破坏性分析和破坏性分析的燃耗测量现状,论述了包括使用γ谱仪和中子探测等的多探头的乏燃料测量系统是燃耗测量的发展趋势。

关键词：乏燃料燃耗测量裂变产物非破坏性分析 γ谱仪

Optimal Control of Impulsive Switched Systems

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Optimal Control of Impulsive Switched Systems

Output-Based Optimal Control of Impulsive Switched Systems

第31届中国过程控制会议（CPCC2020）

作者： li sheng-tao liU Xiao-mei School of Information Science and Engineering Shandong Normal University Business School Shandong Normal University

In this paper, an optimal control problem is solved for a class of impulsive switched autonomous systems. The sequence of active subsystems is pre-specified, and the control variables consist of the impulse times and a set of scalars which determine the jump amplitudes. The subsystems do not require a refractory period, which can bring more generality. Based on the calculus of variation, the partial derivatives of the cost with respect to the control variables are derived, based on which the optimality conditions are given. Finally, two examples are given to testify the viability.

关键词： Optimal control Impulsive switched systems Calculus of variation

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Output-Based Optimal Control of Impulsive Switched Systems

第31届中国过程控制会议（CPCC2020）

作者： liU Xiao-mei li sheng-tao Business School Shandong Normal University School of Information Science and Engineering Shandong Normal University

In this paper, we solve an optimal control problem for a class of impulsive switched autonomous systems. The considered system undergoes jumps at the switching times and the state is only partially known through the outputs. The control variables consist of the impulse times and a set of scalars which determine the jump amplitudes. A method is presented that both guarantees that the current control variables remain optimal as the state estimates evolve, and can be applied to real-time applications. The optimal impulsive control strategy can be found using a numerical gradient descent algorithm. Finally, a numerical example is presented to illustrate the effectiveness.

关键词： Optimal control impulsive switched systems observer

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发展在XLPE电缆绝缘内外侧的电树枝

物理学报 2007年第9期56卷 5494-5501页

作者：郑晓泉谢安生李盛涛西安交通大学电力设备电气绝缘国家重点实验室长安大学环境科学与工程学院西安710064

以XLPE高压电力电缆内外侧绝缘中的电树枝特性为研究对象,通过分析电树枝引发与生长的统计实验规律和采用扫描电子显微镜分析发现,由于不同结晶状态的影响,电缆绝缘内外侧的电树枝特性存在很大的差异.引发于绝缘内侧电树枝引发时间短、... 详细信息

以XLPE高压电力电缆内外侧绝缘中的电树枝特性为研究对象,通过分析电树枝引发与生长的统计实验规律和采用扫描电子显微镜分析发现,由于不同结晶状态的影响,电缆绝缘内外侧的电树枝特性存在很大的差异.引发于绝缘内侧电树枝引发时间短、生长速度快、电树枝形状具有多样性;起始于绝缘外侧的电树枝不仅引发时间长、生长速度极慢,而且电树枝形状(结构)比较单一.并对这两个位置电树枝的引发和生长机理进行了探讨.

关键词：电树枝结晶状态统计规律内侧和外侧绝缘层