微机在工程质量控制中的应用

建筑安装企业的工程质量控制,涉及质量管理、质量统计、质量信息几个方面。应用微机可以进行工程质量数据积累、质量信息检索、数理统计分析、质量报表编制等工作。工程质量控制可通过图形显示,在微机屏幕上直观地选择控制,并打印出相应的控制图形。常用的方法有:直方图、排列图、管理图、选控图、回归分析、假设检验等。微机程序用于数理统计、概率分布、图形显示、选择控制、报表及图形打印等。现就常用的几种质量控制图分述如下:(一)直方图直方图是用来帮助我们分析和掌握产品质量分布     

基于主成分分析的经济统计方法及应用

常用的线性回归方法只将因变量视为随机变量,其回归结果随坐标系选取的不同将发生相应改变。受统计分析中主成分分析法的启发,提出了一种新的具有坐标无关性的一元线性回归方法——主成分分析法。用仿真例及实例验证了新方法与常规的最小二乘法相比回归系统偏差小,回归精度高。主成分分析法是数值解,其计算量上的优势使其具有广阔的应用前景。     

天然气流量检测中数据采集与处理系统软件的研制

介绍了天然气流量计量检测过程中,将原国产与进口的几台计算机分别采集、处理数据,合并为一台计算机来集、处理数据,进而实现高效自动地完成数据统计、回归分析、误差处理、检定计算,使工作达到快速、准确的应用结果。     

连云港市经济社会文化科技协调发展对策分析

本文以系统论的观点，应用相关分析、回归分析、因子分析等统计方法对连云港在经济、社会、科技、文化等方面十年间的发展态势进行了分析，并根据计算结果，提出了行之有效的发展对策。     

运用LCC理论选择设备最佳更新期

设备最佳更新期的选择方法很多,如劣化值法,年收益最大值法等,总的原则是寻求设备投入与产出之差最大的年份,作为设备更新的年份.目前看来,运用设备寿命周期费用法(LCC),求出年最大收益值,进而确定设备最佳更新期,不论在理论分析上,还是在数学推导上,都是比较科学的方法,其求解过程简述如下.1.求设备寿命周期费用Y_1:Y_1=P+V·t=β·V_0·t+V_0t+P(1)2.求设备寿命周期内的总输出Y_2Y_2=A·E·t(2)3.求设备寿命周期年收益Y:     

电厂化学水质报表中Excel功能的应用分析

文中结合Excel的特性论述了Excel函数等一些功能在电厂化学实际工作中的应用分析.Excel功能在格式化工作袁的建立、水质指标合格率的统计、水汽品质报表超标项目的呈现工作中有着突出的效果.方便了日后工作中数据的永久保存和快速准确搜索.节省了生产管理成本,减少了工作力度,在数据统计和生产效率方面得到了有效提升.     

如何在foxBASE中产生随机数

foxBASE关系数据库是一个优秀的数据库管理软件。它有很快的运行速度和极强的功能,与dBASE3完全兼容,而且扩充了许多命令,增加了不少函数。但是在近80种函数中,仍然没有产生随机数的函数。 在用foxBASE处理数据,做概率统计分析中,经常遇到求区间(a,b)均匀分布的随机数的一类问题。本文试就如何在foxBASE中产生随机数,探讨有关算法,并且对其进行分析比较,以确定可行性。     

气藏动态开发分析软件的研制与应用

本文介绍了气藏动态开发分析软件的主要功能和实例运用。该软件利用气藏动态和静态资料为基础，进行气藏描述、气藏连通性分析、储量核实计算、产能分析等气藏开发动态分析工作，并运用实际数据展示软件在分析工作中的应用效果。     

甘肃省区域经济空间差异分析研究——基于Geoda095i统计分析

基于空间经济统计分析方法,在MapInfo软件和Geoda095i空间统计分析的帮助下,通过空间位置建立数据间的统计关系,利用2009年区域GDP数据,对甘肃省区域经济之间的总体和局部空间差异时空格局及相关因素时行了分析,发现该时期甘肃省各市GDP增长水平分布呈现同步发展的态势,经济发展水平相近的地区在空间上的聚集分布十分明显,因此,基于对Moran散点图的分析,以空间聚集关系、空间滞后回归模型的回归分析,发现空间统计分析对于甘肃省区域发展的空间状态揭示了不同区域经济差的空间联系及空间变化的相互作用机制。     

潜油电泵失效叶导轮的可靠性分析

通过对大庆油田近5年潜油电泵失效叶导轮的数据统计，应用可靠性分析理论和方法，从无参数统计分析、有参数分布类型统计分析和失效件形貌分析三个方面进行了叶导轮失效规律研究，得到了叶导轮的主要失效模式是磨损，统计样本在保修期一年内的故障率为32.0%,可靠度在保修期一年时为0.961，并对叶导轮失效因素和控制措施进行了探讨。     

天然气脱硫装置高耸烟囱结构的可靠性向量

利用风压的概率分布服从极值Ⅰ型,建立了具有中介状态的烟囱结构可靠性向量的计算方法.运用该方法分析一个已腐蚀的烟囱结构的可靠性,为烟囱所在单位提供决策数据.由于可靠性向量全面描述了结构可靠性状态,因此所提方法更符合工程实际.     

免棱镜全站仪在已有建筑测绘中的应用方法

结合实际测绘情况,介绍了利用免棱镜全站仪的数据采集功能进行外业接坐标、现场人工绘草图、内业数据处理后在AutoCAD中展点成图,在此基础上结合钢尺测量数据,绘制平、立面图的方法,并对该测量方法的实施步骤和关键技术作了较为详细的介绍。     

The diffusion of mobile data services and applications: Exploring the role of habit and its antecedents

Given the prevalence of mobile data services and applications (MDSA) such as App Store, it is important to diffuse MDSA and understand user behavior toward it. Recent research on marketing and information systems (IS) has shed light on the habitual use of frequently used IS. This study attempts to develop a research model that clarifies the role of habit in the actual use of MDSA. Considering the unique and specific characteristics of MDSA, this study examines the antecedents of MDSA habit in an effort to elucidate key factors accelerating the development of MDSA habitual use. Data collected from 317 users who had prior experiences with MDSA were empirically tested against the research model using partial least squares (PLS). The analysis results indicate that both continuance intention and habit play an important role in the actual use of MDSA. Moreover, the findings reveal that habit is a more prevalent predictor of actual use compared to conscious intention. It was found that user satisfaction, perceived monetary value, and variety of use serve as the antecedents of MDSA habit. The theoretical and policy implications of the findings are described.     

Macroeconomic characteristics and inventory investment: a multi-country study

The paper is a new element in a series of studies analyzing macroeconomic inventory behavior by use of multi-country data. In this paper, seven hypotheses are tested with positive result. These hypotheses include subjects like relations of inventories with growth and with some other macroeconomic indicators of the use of GDP and the long-term tendencies of global inventory formations. Multivariate statistical analysis is used for evaluation.     

校园地理信息系统(CGIS)与发展预测

以建立基于地理信息系统（GIS）的湖北工业大学校园信息管理系统为例，探讨建立校园信息系统的系统设计方法、系统的数据设计，以及满足系统功能的系统设计流程和校园GIS的楼层模型。对系统的各功能模块作了较详尽的分析，同时将GIS和人工神经网络技术相结合，建立校园用地转换模型，对校园发展进行预测。     

The efficiency of conventional fuel power plants in South Korea: A comparison of parametric and non-parametric approaches

The efficiencies of the 64 conventional fuel power plants operating in South Korea were determined by data envelopment analysis (DEA) approaches, as well as by a stochastic-frontier method. The Banker, Charnes and Cooper (BCC) DEA efficiencies were introduced into an econometric estimate of a standard production function model, leading to a corrected factors version of the model, with significant improvement of the statistical explanation of our data. A statistical analysis of the DEA efficiencies was carried out, and these were compared to efficiencies revealed by a stochastic-frontier method.     

The Use of Information Technology by National Unions: An Exploratory Analysis

Exploratory factor analysis and correlation techniques are applied to survey data to examine national unions' use of information technology (IT). We identify common dimensions in current and planned use of IT forms, its applications, and implementation issues. Finally, relations among these dimensions and selected union characteristics are examined.     

Entrepreneurs’ use of internet and social media applications

While it is recognized that the Internet and entrepreneurial opportunity are linked, the majority of studies analyzing business use of the Internet focus on small and medium-sized enterprises (SMEs). To address a need for adoption studies focused on new ventures, which differ from SMEs in terms of organizational stage and number of employees, this study analyzes survey data from entrepreneurs to understand factors that influence the adoption of multiple Internet and social media platforms, and the role of business incubation facilities in providing information technology assistance to these ventures. Regression analysis of survey data reveal that prior entrepreneurial experience was the most important factor in explaining a diverse number of Internet application and social media use. This finding likely stems from differences in cognitive frameworks between novice and experienced entrepreneurs, which impacts their ability to recognize opportunities and respond to technological change. The location of a new venture within a business incubation facility did not help in the diverse use of Internet applications. This result did vary by gender as model results highlighted that women in business incubation facilities were more likely to use a diversity of Internet applications than those not located in these facilities. These findings point to policy implications regarding the implementation of technology training programs for female entrepreneurs, and digital awareness/ training for novice entrepreneurs.     

多参数法清浊音分析的改进

设计提出了一种多参数的清/浊音判决法。该方法是在传统两参数(短时能量和过零率)算法基础上增加了自相关函数和短时平均幅度作为判决参数,并通过对短时能量、平均幅度、短时过零率曲线等参数的分析和计算,来达到减少清/浊音信号的误判率的目的。经实验证明,算法切实可行,且误判概率小。     

模式识别中的光字符识别技术及应用综述

介绍了模式识别的概念,阐述了模式识别中的统计决策法、结构模式识别、模糊模式识别与人工神经网络识别,重点介绍了字符识别中的光字符识别技术。OCR技术综合了数字图像处理、计算机图形学和人工智能等多方面的知识,成为当今模式识别领域最活跃的研究内容之一。OCR技术在文字识别中有着广泛应用,文中对OCR技术在我国汉字印刷体和手写体识别中的应用作了重点介绍,最后扼要介绍了OCR技术的研究方向。