河南省上市公司资本结构与绩效研究

以河南省上市公司为样本,用资产负债率和负债与股东权益比作为财务杠杆的代表变量,净资产收益率和总资产收益率作为公司绩效的代表变量,分析研究公司资本结构与资产结构、成长性、公司规模、获利能力和风险之间的相关性,以及公司绩效与资本结构之间的相关关系。研究结果显示公司资产结构和获利能力对资本结构有显著的影响,资本结构对公司绩效无显著影响。     

关于网络虚拟财产的民法思考

近年来,有关网络虚拟财产的民事纠纷不断发生,但是我国的相关立法尚不健全。分析了网络虚拟财产的法律属性,认为网络虚拟财产同时具备物权和债权的属性,并呼吁我国网络虚拟财产急需立法保护。     

体感交互式拟人手臂机器人

针对目前人体动作同步机器人造价高,使用过程繁琐,需要穿戴多种传感器设备等缺点,设计并研制了一种不需 要穿戴传感器的人体手臂动作同步机器人。介绍了机器人的结构和系统组成,给出了Kinect读取和共享数据以及转换 为机械臂可用数据的方法,设计PID结合PWM脉宽调速的控制驱动模块,完成了机械臂控制系统的软件。结果表明该 人体动作同步机器人在未经培训的操作者指挥下,能够从不同初始位置完成人类肢体动作发出的指令,并且精度较高。 这一研究可为无传感器肢体交互智能机器人研制提供参考     

Design and implementation methodology based on Petri net formalism of flexible manufacturing systems control

This paper presents an aided design methodology of flexible manufacturing system control with a view to industrial implementation. The approach considered through a modelling phase, the a validation phase by simulation and finally a distributed implementation phase. In the modelling phase, based on the Petri net formalism, we demonstrate the hierarchical aspect which separates the part flow control and the product resource control. In addition, we emphasize generic aspects which allow us to use an object-oriented approach. These aspects and the set of modelled objects are directly used in the simulation and production phases after an automatic translation in an implementation language (ADA in our case). In consequence, the distributed location for those two phases is well facilitated from the viewpoint of the approach used.     

Ranking paired contestants

The ranking of paired contestants (players) after a series of contests is difficult when every player does not play every other player. In the 1975 JASA Mark Thompson presented a maximum likelihood solution based on the assumption that the probability of any one player defeating any other is a function only of the difference in their ranks. Here the linear approximation to that likelihood is shown to lead to a nonparametric measure of the efficacy of the ranking, called the net difference in ranks (NDR) , which is the sum of the differences in ranks of the paired players in the observed contests that agree with the ranking minus the sum of the differences in ranks in the observed contests that disagree with the ranking (upsets) . The subject is part of a large literature that has been consolidated by H.A. David in The Method of Paired Comparisons (1963, 1988). The method was introduced by the psychophysicist Fechner in 1860 and has been widely applied to sensory testing,     

英语网络语言理据刍议

英语网语成因复杂,既受社会因素、心理因素、黑客因素影响,又同人类认知及语言自身发展规律密不可分。深层次探析该语言现象的理据,为研究汉语网语及未来语言的发展趋势提供参考。     

基于数字照相技术的边坡变形自动化监测技术研究

将数字摄影测量技术应用于边坡位移自动监测。在边坡上布设固定标志点，将非量测数码相机置于边坡正面，运用程序控制相机间隔一定时间对边坡进行拍摄。对拍摄图像预处理后使用圆心亚像素识别算法确定测点亚像素位置。根据标志初始实际距离与初始相片像素距离建立物象比例，对比各次识别结果得到各测点实际的相对位移。运用GPS技术和计算机技术，本系统可实现数据交换、控制指令发送和预警的适时监控。本系统采用非量测数码相机，相对于传统边坡检测方法具有成本低，精度高，需要人工干预少等优点，现场试验50 m距离识别精度达到3 mm，取得较好效果，可以作为大量边坡自动化监测的有效手段。     

The reality of net capital gains and annual profit on NZ primary producing businesses: data from a recent survey of all farm types

ABSTRACT

Annual net cash returns and net capital gains provide farmers with their actual and potential monetary rewards, respectively. This article reports on a national farm survey showing both actual and potential returns, on average, are not as high as might be imagined. This is supported by the findings of earlier studies and has implications for rural societies and their associated economies. Data on income, expenses and profit is presented as is data on farm value changes over the life of each farm. The information is adjusted for inflation to provide ‘real’ data. The profit and net capital gain figures are divided into groupings based on a range of criteria such as total farm capital, and labour compliment as a reflection of farm size. Statistically significant differences occur for some groupings such as farm type and farm size.     

Fire Risks in Oil Refineries: Economic Analysis of Camera Monitoring

A probabilistic method is presented to evaluate the economic value of fire monitoring by closed circuit TV camera in petroleum refineries. The proposed model is restricted to the analysis of risk reduction in an area where fires can be caused either by pump failure or by failure of valves and lines. The benefits come from reducing the time during which the fire grows undetected. Fire growth and expected values of losses are analyzed by a Markov model that includes five phases: (1) active undetected growth, (2) detection, (3) fire growth at the beginning of the firemen's intervention, (4) fire control, and (5) fire extinction. The results (e.g., the expected net present value of the investment) show that the proposed monitoring investment is attractive for an illustrative example.     

大学英语教学与综合能力培养

本文根据修订后的<大学英语教学大纲>,倡导在教学实践中运用现代外语教学理论,推行以学生为主体以实践为中心的教学模式,打好大学生英语语言基础,提高大学生运用英语语言的综合能力.