生态城市规划方案的综合评价

在确定生态城市规划方案影响因素的前提下,采取层次分析与模糊综合评价相结合的方法,对生态城市规划方案作出评价,以此增强生态城市规划方案评价的科学性,提高方案评价的可靠度,探索使生态城市规划达到最佳效果的新途径.     

DDS技术正弦信号发生器的实现

该系统基于DDS技术的正弦信号发生器,其主要模块有DDS部分正弦波生成、频率控制、幅度控制、D/A转换和后级处理以实现AM、FM、ASK、PSK、FSK等功能)。各模块均通过Verilog语言编程在FPGA上实现然后在后级处理采用低通滤波器和功率放大电路来提高波形质量和负载能力。最终得到所要求的正弦信号发生器,在现代通信中具有良好的使用性。     

合成战视野下的武汉城市视频监控系统研究

合成战的提出,符合当前犯罪持续高发的态势、新犯罪形态模式的出现以及犯罪的流动性和突发性的特征。武汉城市视频监控系统符合主体合成战、方法合成战和技术合成战的要求。发展中的城市视频监控系统仍有需要完善的地方,主要体现在法律支撑、优化系统和实战细化等方面。     

呋喃酚的合成方法

根据原料的不同,呋喃酚合成方法可分为邻苯二酚法、邻氯苯酚法、环己酮法、硝基苯酚法、愈创木酚法、邻异丙基酚法、羟基苯异酮法等,文章对前几种较常见的合成方法的原理及工艺进展进行了详细的综述,并展望了呋喃酚合成方法的发展趋势。     

聚合硫酸铁合成条件的研究

硫酸亚铁氧化及其产物聚合硫酸铁在干燥等过程中的原料加入量、反应温度、氧化时间、反应酸度、聚合时间等参数的影响。通过正交试验,获得了优化的工艺条件。Fe2+与H2O2的摩尔比为1:1.5,酸度为1.5,反应温度在55～60℃之间,氧化反应时间为90min,聚合时间为3h时,产品质量稳定,外形优美,色泽好,且符合我国聚合硫铁的质量标准。     

碳酸二甲酯合成工艺及应用研究进展

文章介绍了国内外碳酸二甲酯合成工艺及应用的研究进展,并结合几种工艺分析,提出了研究的发展方向。     

A multi-purpose heuristic for communications satellite synthesis

Three satellite system synthesis problems—the satellite location problem, the signal protection problem, and the arc allotment problem—are described and formulated. In each of these problems, satellite administrations are to be allotted some portion of the geostationary orbit for the purpose of deploying their satellites, subject to angle of elevation and electromagnetic interference constraints. A simple heuristic procedure is suggested as a means for solving these three problems. Sufficient conditions for the successful application of the heuristic and solution-value bounds for each problem are presented. The heuristic is applied to each problem for a six-satellite example. Additionally, computational results are presented for an example with 183 satellites worldwide.     

不同硅溶胶对L沸石合成晶型的影响

以不同牌号的硅溶胶为硅源合成L沸石,利用TEM和SEM、XRD表征技术,考察硅溶胶质量对L沸石合成的影响。结果表明:硅溶胶的粒径影响L沸石晶粒尺寸;浓度影响L合成时凝胶速度;无论何种牌号的硅溶胶在优选的配比下,均可获得较纯的L沸石。     

Tenure choice and expected mobility: A synthesis

This study employs a joint logit probability model to estimate the effects of a vector of independent variables on the household's current tenure choice and expected mobility which are hypothesized to be simultaneously determined. In the empirical analysis it was found that the coefficient on the endogenous variables (tenure choice and expected mobility) is the most highly significant of all the coefficients estimated. In addition, in previous analyses the age of the household head has always exhibited a highly significant positive effect on the probability of ownership. However, in this analysis it is demonstrated that this age variable was acting as a proxy for the expected mobility and wealth of the household.     

浅谈室内装饰监理

我国室内装饰行业市场容量巨大,但市场秩序却很混乱,装饰企业和顾客纠纷时有发生,市场需要室内装饰监理的介入。本文分析了我国目前的室内装饰市场和室内装饰监理行业的现状及存在的问题,并提出了一些建议,以期缓解或解决这些问题。     

On forecasting of innovations

The forecasting of basic technological innovations is focused. Clarification of the involved key concepts and an analytical framework are given. The forest industry serves as a background and illustration to the discussion. Considerable uncertainty prevails with respect to strategic investments in production in this industry. Industries, technological products, etc. have empirically been shown to pass similar phases of development over time. This life cycle starts with a basic innovation following on a previous invention. Due to competetion from more recent basic innovations the final phase is one of decline. Basic innovations are suggested to be exogenously determined and to cause structural change. The choice of forecasting strategy is suggested to be made dependent on the type of innovation, knowledge base, and life cycle position.     

小议“利得”之概念

所有者权益的来源包括所有者投入的资本、直接计入所有者权益的利得和损失、留存收益等。利得属于《企业会计准则》中一个新的概念,本文对于它的确认、计量和报告试图进行一个系统的阐述,并将之与收入进行比较。     

On direction of dependence

Under the assumption of the existence of linear relationship between two random variables, new formulas are introduced to express the coefficient of correlation. One of these formulas, the fourth power of the correlation coefficient is used to determine the direction of dependency between two random variables. Also an interpretation of the correlation coefficient as an asymmetric function of kurtosis coefficient and skewness coefficient of dependent variable and independent variable is provided. In the absent of the intercept in linear regression, the correlation coefficient is also expressed as a ratio of coefficients of variation between independent and dependent variables.     

Sport entrepreneurship: A synthesis of existing literature and future perspectives

International Entrepreneurship and Management Journal - Sport entrepreneurship is progressively emerging as an extremely significant stream of research. Accordingly, scholars are increasingly...     

Turnover process models: Review and synthesis of a conceptual literature

Turnover process models have been appearing in the organizational literature since the 1950s. A review of this conceptual literature was performed. Consensus analysis revealed a high level of cross-model agreement on the importance of three standard turnover-theory components (i.e., employee morale, labor-market mechanisms, intentions to quit/stay). In addition, a review of secondary turnover dimensions indicated some degree of consistency in the way particular dimensions have been utilized in the conceptual literature. Areas of conceptual divergence and emerging trends in this area of work are discussed.     

关于辞格中的借代

借代是传统的修辞手法,修辞学界多年来一直研究它,但对它的解释却显得空泛、笼统。而从认知语言学的解释途径对借代的各种方式逐一加以解释,则能够探求其形成动因和从这一角度解释的意义。     

谈领导作用

近年来,随着科学技术和经济的飞速发展以及日趋激烈的市场竞争．质量工作在企业的生产经营活动中已经凸显出越来越重要的作用。特别是近半个世纪来．质量管理的理论与实践都取得了十分令人瞩目的成就．有效地促进了企业经济效益的提高和世界经济的发展。人们对质量的认识与几十年前相比．早已不可同日而语。     

论适度

笔者发展提出《论适度》,论述质量管理领域“适度”的确切的定义及其内涵,阐明“适度”的适用范围和重要作用。