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Wuhan University Journal of Natural Sciences 2020年第1期25卷 33-51页

作者： jiang juncheng LU Yuanjia CHEN Xianyou Management College Wuhan Institute of TechnologyWuhan 430205HubeiChina Economics and Management College Huazhong Agricultural UniversityWuhan 430073HubeiChina

For the problem of improving the efficiency and optimizing the resource allocation in urban elderly care,by using complex scientific management method and the empirical analysis on the efficiency of the urban elderly care modes,this paper proposes that the key is to balance supply efficiency between the long-term and short-term elderly care *** short-term pattern is to enhance urban residents’confidence,and the long-term one promotes the sustainable development of the elderly care to prevent the aged poverty due to oldness and *** paper suggests that the building of"government assistance+community leadership+enterprise cultivation"mode can improve the overall efficiency of the urban elderly care to reach the Pareto optima,and fulfil the goals of the urban elderly care by providing a security and enjoyable life.

关键词： urban elderly care model comparison suppliers efficiency balance

Insights into Pyrolysis of Nano-Polystyrene Particles: Thermochemical Behaviors and Kinetics Analysis

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Journal of Thermal Science 2019年第4期28卷 763-771页

作者： DING Li ZHAO Jianping PAN Yong GUAN Jin jiang juncheng WANG Qingsheng College of Mechanical and Power Engineering Nanjing Tech UniversityNanjing 211816China College of Safety Science and Engineering Nanjing Tech UniversityNanjing 211816China Department of Fire Protection and Safety Oklahoma State UniversityStillwater 74078USA

The thermal degradation kinetics of nano-polystyrene particles with diameters of 60,90,160,and 225 nm were investigated in nitrogen atmosphere using thermogravimetric analysis(TGA).Various kinetic models were employed to determine the thermal degradation mechanism and ***-polystyrene particles have relatively lower thermal stability when compared to *** differential thermo–gravimetric(DTG)data and apparent activation energies indicate that the thermal degradation of nano-polystyrene particles at 60 nm is a two-step reaction process where the second step plays a dominant role,while nano-polystyrene particles with diameter greater than 60 nm exhibit single-step *** to most micro/macro polystyrene particles,DTG peaks of nano-polystyrene particles shift towards higher temperatures with increasing heating *** degradation of nano-polystyrene particles under nitrogen atmosphere follows the first-order reaction ***,the apparent activation energies increase(162-181 kJ·mol–1)with the increase of particle sizes(60-225 nm).This study could provide some insights into pyrolysis of nano-polystyrene particles and a safer process of manufacturing,storage and handling of nano-polystyrene particles.

关键词： nano-polystyrene thermal decomposition kinetics mechanism

Prediction of the flash points of alkanes by group bond contribution method using artificial neural networks

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Frontiers of Chemical Science and Engineering 2007年第4期1卷 390-394页

作者： PAN Yong jiang juncheng WANG Zhirong College of Urban Construction&Safety&Environmental Engineering Nanjing University of TechnologyNanjing 210009China

A group bond contribution model using artificial neural networks,which had the high ability of nonlinear of prediction,was established to predict the flash points of *** model contained not only the information of group property but also connectivity in molecules.A set of 16 group bonds were used as input parameters of neural networks to study the correlation of molecular structures with flash points of 44 *** results showed that the predicted flash points were in good agreement with the experi-mental data that the absolute mean absolute error was 6.9 K and the absolute mean relative error was 2.29%,which were superior to those of traditional group contribution *** method can be used not only to reveal the quantitative correlation between flash points and molecular structures of alkanes but also to predict the flash points of organic compounds for chemical engineering.

关键词： artificial neural networks flash point group bond contribution alkane

FIELD-NETWORK MODEL FOR MINE FIRE SMOKE MOVEMENT

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中国有色金属学会会刊：英文版 1997年第4期7卷 165-169页

作者： jiang juncheng, Wang Xingshen Department of Mining Engineering, China University of Mining and Technology, Xuzhou 221008

ＦＩＥＬＤＮＥＴＷＯＲＫＭＯＤＥＬＦＯＲＭＩＮＥＦＩＲＥＳＭＯＫＥＭＯＶＥＭＥＮＴ①ＪｉａｎｇＪｕｎｃｈｅｎｇ，ＷａｎｇＸｉｎｇｓｈｅｎＤｅｐａｒｔｍｅｎｔｏｆＭｉｎｉｎｇＥｎｇｉｎｅｒｉｎｇ，ＣｈｉｎａＵｎｉｖｅ... 详细信息

ＦＩＥＬＤＮＥＴＷＯＲＫＭＯＤＥＬＦＯＲＭＩＮＥＦＩＲＥＳＭＯＫＥＭＯＶＥＭＥＮＴ①ＪｉａｎｇＪｕｎｃｈｅｎｇ，ＷａｎｇＸｉｎｇｓｈｅｎＤｅｐａｒｔｍｅｎｔｏｆＭｉｎｉｎｇＥｎｇｉｎｅｒｉｎｇ，ＣｈｉｎａＵｎｉｖｅｒｓｉｔｙｏｆＭｉｎｉｎｇａｎｄＴ...

关键词： mine fire computer simulation field network model

Radioactive probe-guided parathyroidectomy for secondary hyperparathyroidism

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Chinese Medical Journal 2014年第13期127卷 2413-2418页

作者： Yuan Fei Yu Weijia Waqas Ahmad Yang Zhixue Cao Hua Li juncheng jiang Guoqin Department of General Surgery the Second Affiliated Hospital ofSoochow University Suzhou Jiangsu 215004 China

Background The value of gamma probes in the surgical treatment of secondary hyperparathyroidism （sHPT） was *** aim of this study was to enhance the rate of successful total parathyroidectomy in patients with sHPT using intraoperative gamma probe *** We retrospectively analyzed the clinical data of 48 sHPT patients between May 2007 and September *** 99Tcm-methoxyisobutyl isonitrile （MIBI） scintigraphy and high-frequency ultrasonography were used for parathyroid ***-five patients （group Ⅰ） underwent conventional neck exploration and open *** patients （group Ⅱ） underwent gamma probe-guided total parathyroidectomy and parathyroid *** two groups were compared in terms of the number of parathyroid resections,operative time,and postoperative changes in the blood levels of parathyroid hormone （PTH）,calcium,and *** The clinical manifestations,PTH and calcium levels,age distribution,and clinical characteristics did not differ between the two *** accuracy of preoperative 99Tcm-MIBI scintigraphy （89.74％） for the diagnosis of hyperparathyroidism did not differ from that of ultrasonography （81.25％）.However,the accuracy of 99TcmMIBI scintigraphy （66.67％） for localizing hyperfunctioning parathyroids was significantly lower than that of ultrasonography （76.86％）.The operation time was significantly longer in group Ⅰ （（120±25） minutes） than in group Ⅱ （（90±30） minutes）.The accuracy of parathyroid identification was significantly higher in group Ⅱ （92.59％） than in group Ⅰ （80.39％）.On average,significantly fewer parathyroid specimens were obtained in group Ⅰ （2.5±0.5） than in group Ⅱ （3.5±0.5）.Compared with group Ⅰ,group Ⅱ showed a significant increase （15.4％） in the number of parathyroid *** PTH,calcium,and phosphate levels significantly decreased postoperatively in all *** Intraoperative gamma probe examination confirmed that the excised s

关键词： secondary hyperparathyroidism hyperthyroidism 99Tcm-MIBI imaging gamma probe

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A类颗粒流化床特性的DEM-CFD模拟

化学反应工程与工艺 2010年第5期26卷 411-417页

作者：殷亮蒋军成南京工业大学城市建筑和安全学院江苏南京210009

采用离散元方法-计算流体力学(DEM-CFD)对耦合边界下A类颗粒流化床特性进行模拟。讨论了在床底的表观速度取决于流场情况下,不同进口流速时该类颗粒的流化状态。分析了流动与颗粒运动的相互作用,及其对最小流化速度和最小气泡速度的影... 详细信息

采用离散元方法-计算流体力学(DEM-CFD)对耦合边界下A类颗粒流化床特性进行模拟。讨论了在床底的表观速度取决于流场情况下,不同进口流速时该类颗粒的流化状态。分析了流动与颗粒运动的相互作用,及其对最小流化速度和最小气泡速度的影响。发现与均匀床底的表观速度相比,当床底的流动速度取决于流动与颗粒运动耦合时,床体的稳定性变差,床底的速度分布呈现不均匀,局部更早出现气泡,并沿着该位置的轴向向床顶面发展,形成沟流,而此时其它部位会产生死区。

关键词：流化床 A类颗粒耦合边界离散元方法计算流体力学数值模拟

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我国农地承包经营权流转体系构建研究

东南学术 2009年第3期 21-25页

作者：蒋军成中南财经政法大学公共管理研究所

2009年的"中央1号文件"提出健全农地承包经营权流转市场,这使稳定农地承包关系,发展规模化经营,成为一个重大而紧迫的课题。从农地承包经营流转权的前提、主体、形式、融资和保障措施方面,提出进行农地的确权、尊重农户的土地流转主体... 详细信息

2009年的"中央1号文件"提出健全农地承包经营权流转市场,这使稳定农地承包关系,发展规模化经营,成为一个重大而紧迫的课题。从农地承包经营流转权的前提、主体、形式、融资和保障措施方面,提出进行农地的确权、尊重农户的土地流转主体地位、创新农地流转形式、完善农村社保机制、盘活农地融资方式等措施,从而促进农地集约化发展,建立现代农业。

关键词：农地承包经营权流转市场体系构建

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管状容器气体燃爆泄放过程的数值模拟

天然气工业 2005年第6期25卷 122-124页

作者：王志荣蒋军成南京工业大学城市建设与安全环境学院

工业过程中管状容器气体爆炸事故时有发生,严重威胁着过程工业的安全生产。为预防这类事故,通常会在容器上安装泄压装置,这就要求对该类容器进行防爆泄压设计。对管状容器气体爆炸泄放过程进行分析,特别是容器内压力发展特性的分析是进... 详细信息

工业过程中管状容器气体爆炸事故时有发生,严重威胁着过程工业的安全生产。为预防这类事故,通常会在容器上安装泄压装置,这就要求对该类容器进行防爆泄压设计。对管状容器气体爆炸泄放过程进行分析,特别是容器内压力发展特性的分析是进行防爆泄压设计的关键。为此,首先分析了管状容器内气体爆炸泄放过程,根据其燃爆发展规律建立了描述整个泄爆过程的物理模型。从能量守恒方程和质量守恒方程出发,结合气体状态方程、绝热压缩方程和气体泄放速率方程建立了泄爆过程的数学模型,利用四阶龙格—库塔方法对该过程进行了数值模拟,得到了不同时刻燃爆压力、压力上升速率、火焰位置和火焰传播速度。另外还讨论了泄压面积和泄爆压力对泄爆过程的影响,对于该类容器的防爆泄压设计具有指导意义。

关键词：管状容器气体爆炸事故泄压装置防爆泄压设计数值模拟燃爆压力压力上升速率火焰位置火焰传播速度

基于电性拓扑状态指数的二元液体混合物自燃温度的预测

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化工学报 2016年第7期67卷 3109-3117页

作者：何凡蒋军成潘勇倪磊南京工业大学安全科学与工程学院江苏省危险化学品本质安全与控制技术重点实验室江苏南京210009

利用AITTA551自燃温度测试仪,测得不同组分和配比下的28组168个二元可燃混合液体自燃温度(AIT);基于电性拓扑状态指数(ETSI)理论,计算获得不同原子类型所对应的混合ETSI值;采用添加指数递减惯性权重的改进粒子群算法(MPSO)优化支持向量... 详细信息

利用AITTA551自燃温度测试仪,测得不同组分和配比下的28组168个二元可燃混合液体自燃温度(AIT);基于电性拓扑状态指数(ETSI)理论,计算获得不同原子类型所对应的混合ETSI值;采用添加指数递减惯性权重的改进粒子群算法(MPSO)优化支持向量机(SVM)的超平面参数,建立根据原子类型混合ETSI值来预测混合物自燃温度的MPSO-SVM模型。结果表明,基于电性拓扑状态指数能够有效预测二元液体混合物自燃温度,MPSO-SVM模型的复相关系数R2为0.991,平均绝对误差AAE为3.962 K。MPSO-SVM模型的泛化性能和预测精度明显优于多元线性回归(MLR)、网格搜索法(GSM-SVM)、遗传算法(GA-SVM)、标准粒子群算法(PSO-SVM)模型。本研究为工程上提供了一种预测二元混合物自燃温度的有效途径。

关键词：电性拓扑状态指数二元混合物算法自燃温度预测

圆柱形薄壁储罐对爆炸冲击波动力学响应的模拟分析

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化工学报 2008年第3期59卷 796-801页

作者：潘旭海徐进蒋军成南京工业大学安全工程研究所江苏南京210009

针对圆柱形薄壁储罐在爆炸冲击波载荷作用下的动力学响应进行了模拟分析。采用LS-DYNA软件模拟计算了50m3液化石油气储罐爆炸后冲击波云图以及空间点冲击波超压随时间的变化关系,并将计算结果加载到圆柱形薄壁储罐上。模拟计算结果表明... 详细信息

针对圆柱形薄壁储罐在爆炸冲击波载荷作用下的动力学响应进行了模拟分析。采用LS-DYNA软件模拟计算了50m3液化石油气储罐爆炸后冲击波云图以及空间点冲击波超压随时间的变化关系,并将计算结果加载到圆柱形薄壁储罐上。模拟计算结果表明,对于距离爆炸中心50m处的圆柱形薄壁储罐,面向冲击载荷的底面在冲击波超压峰值还没有来临时就已经屈服,而背向冲击载荷的顶面在0.112ms时,等效应力达到屈服界限。而迎向冲击面的顶端结构在峰值载荷冲击后不久出现屈曲,结构在峰值位移10mm时出现部分卸载,变得不再稳定。因此,当罐区发生爆炸时,圆柱形薄壁储罐极有可能出现结构强度失效和结构失稳,会在冲击波的作用下失效,是不可靠的。

关键词：圆柱形储罐冲击波动力学响应模拟分析