极软表土层支护技术研究

通过对回风斜井的围岩性质及巷道破坏原因分析,结合数值模拟,提出了U型钢支架与短锚杆全长锚固巷道底角加锚索并喷射混凝土封闭围岩支护治理方案。经实验表明,上述方案的实施取得了良好的支护效果。     

瞬变电磁法在复杂煤矿采空区的应用

介绍了瞬变电磁法探测采空区的基本原理。根据采空区的地球物理特征,通过分析多道拟视电阻率断面图,可以准确的探测出采空区的位置。以门头沟采空区为例介绍了瞬变电磁技术在煤矿采空区的应用及取得的良好效果。     

个人抵押贷款违约的相关性因素——基于Copula模型的研究

运用国内商业银行积累的大量数据,统计得到银行个人客户住房抵押贷款多年度、不同信用等级、不同身份特征、分行业和分地区的违约情况,进行非线性的拟合分析,并采用Copula函数度量个人客户违约之间的相关性及厚尾特征。研究表明,房屋价格、客户性别以及受教育程度等与违约概率相关性比较低,在考察的样本区间内,这些因素不显著导致违约发生。另外,信用等级、收入结构和抵押担保剩余额度是影响个人违约决策的重要变量。所采用的模型在个人住房抵押贷款定价与风险管理中获得较好效果,银行可以根据违约状况的变动制定动态利率,随时准备弥补损失。     

电磁流量与示踪相关流量组合测井仪及其应用

在对电磁流量与示踪相关流量组合测井仪的基本原理、井下仪器结构、仪器工作方式、技术指标等内容进行详细阐述的基础上,进一步运用测井实例分析了电磁流量与示踪相关流量组合测井仪能把电磁流量计、示踪相关流量计、同位素吸水剖面测井仪组合到一起,使附加井温、压力、磁性定位等参数相互印证,得出准确的综合解释结果,从而为油田监测提供准确可靠的测井资料,具有一定的现实意义。     

Proteus仿真使用中的几个缺陷和应对办法

Proteus仿真软件,是当前EDA工具软件的优秀代表。但在使用过程中该软件存在一些缺陷。本文列举了该软件在模拟仿真中存在的几个缺陷以及我们采取的应对方法,供大家参考和讨论。     

Simulating Price-Taking

In this article, the author presents a price-takers’ market simulation geared toward principles-level students. This simulation demonstrates that price-taking behavior is a natural result of the conditions that create perfect competition. In trials, there is a significant degree of price convergence in just three or four rounds. Students find this simulation to be a fun, educational experience that adds value to their understanding of competitive markets.     

Prediction of acute and chronic complications by a new computer simulation model for type 1 and type 2 diabetes: the Diabetes Mel l it us Model (DMM)

Summary

An epidemiological simulation model for patients with type 1 and type 2 diabetes (the Diabetes Mellitus Model (DMM)) was developed based on published clinical and observational data and expert estimations, for prediction of short- and long-term outcomes in defined patient cohorts. A computer program was developed with an interface for definition of patient cohorts and for results display. Patient cohorts can be user-defined by gender, age, duration and type of diabetes, glycosylated haemoglobin, blood pressure, albumin excretion and therapy. Based on risk

equations and current risk variable levels, the DMM simulates complications over 10 years (hypoglycaemia; retinopathy; blindness; microalbuminuria and macroalbuminuria; end-stage renal disease; neuropathy; amputation; diabetic foot syndrome; myocardial infarction; stroke; angina pectoris; heart failure; and death). The DMM is suitable for simulation of complications and for estimation of clinical implications of various diabetes care strategies, and may be particularly valuable in lieu of long-term clinical trial data.     

柳工856装载机电气故障模拟试验台开发

由于装载机结构庞大,电器元件隐蔽分散,不适合实物教学。我院研制开发的柳工856装载机电气故障模拟试验台结构紧凑、尺寸小,可在实验室内直接进行实验。教学效果较好,而且经济效益明显,占用实验室空间小。对国内高职院校工程机械电气课程教学有一定的示范和借鉴作用。     

三位一体全面提高学生的实验能力

三位一体的培养模式即:一、对教材的认真预习;二、访问江南大学网上物理化学仿真实验平台,进行仿真模拟实验操作;三、进入江苏省实验示范中心——江南大学化学实验中心在教师的指导下认真完成实验。该教学模式,强化了学生的实验预习环节、提高了实验操作的能力,取得了良好实验的教学效果。     

Research on e-commerce transaction networks using multi-agent modelling and open application programming interface

We provide a formal definition of an e-commerce transaction network. Agent-based modelling is used to simulate e-commerce transaction networks. For real-world analysis, we studied the open application programming interfaces (APIs) from eBay and Taobao e-commerce websites and captured real transaction data. Pajek is used to visualise the agent relationships in the transaction network. We derived one-mode networks from the transaction network and analysed them using degree and betweenness centrality. Integrating multi-agent modelling, open APIs and social network analysis, we propose a new way to study large-scale e-commerce systems.