浅谈GPRS无线技术及其应用

GPRS(通用无线业务)技术是为了满足现有的GSM网络实现与高速数据分组的简便接入而兴起的一门新技术。文章系统分析了GPRS的组成结构及特点,研究了其主要的技术实现。     

一种基于帧结构的MIMO-OPDA盲均衡改进算法

提出了一种新的改进外积分解法(OPDA),克服了单输入多输出(SIMO)系统中的OPDA盲均衡算法扩展到多输入多输出(MIMO)系统中计算复杂度增加的缺点。在MATALB中构建了基于帧结构的MIMO-OPDA盲均衡算法模型,并将改进算法和原算法进行了仿真比较.仿真表明系统运算速度提高了,而且随着接收信息的累积,改进的OPDA和原OPDA算法性能相当,证明算法改进十分有效。     

以标准成本控制为基准的杠杆管理理念——浅析服装业标准成本制度的实施

在市场经济的大背景下,企业时刻面临外部资本市场中多变的金融工具风险,对内面临调控监管的风险。企业作为以利润为主体的单元,如何保证高质量的产品,提高产品的竞争力,最终取决于成本的控制。标准成本控制,传统上运用于制造企业等工业企业。针对服装业特点举例说明在采购、用料、作业、质量控制等方面实施的标准成本控制体系,并在新环境下分析杠杆基准的管理理念对企业实施标准成本管理的影响。     

策略性信息传递与技术贸易的无效率

技术进步是经济增长的引擎,然而,发展中国家未能有效地利用国际技术贸易从发达国家获得自己想要的技术。原因在于,在贸易谈判开始前的了解信息阶段,由于要素禀赋的不一致,发达国家企业具有策略性传递技术质量信息以获取卖者剩余的倾向。预期到这种倾向,发展中国家的企业对发达国家企业传递的信息持不信任态度。通过寻找更多的技术供给方、减少信息质量的可能状态和参照价格标尺,策略性信息传递引起的技术交易无效率可以得到改善。     

Overcoming the barriers to successful implementation of information technology in the U.K. hotel industry

This article examines the organisational barriers to successful implementation of information technology in the hotel industry. These are barriers of will, ability, and finance which block the routes to integration of internal systems.     

大型储存设施——圆顶保温仓库

圆顶保温仓库，具有结构简单、高强度、无梁、无柱、密封、保温、通风性能良好等特点。它是储存粮食、蔬菜、瓜果、肉类的理想设备     

Towards a Model for Teacher Development in Technology Education: From Research to Practice

This paper reports on a series of interventions in New Zealand schools in order to enhance the teaching of, and learning in, technology as a new learning area. It details the way in which researchers worked with teachers to introduce technological activities into the classroom, the teachers' reflections on this process and the subsequent development of activities. These activities were undertaken in 14 classrooms (8 primary and 6 secondary).The research took into account past experiences of school-based teacher development and recommendations related to teacher change. Extensive use was made of case-studies from earlier phases of the research, and of the draft technology curriculum, in order to develop teachers' concepts of technology and technology education. Teachers then worked from these concepts to develop technological activities and classroom strategies. The paper also introduces a model that outlines factors contributing to school technological literacy, and suggests that teacher development models will need to allow teachers to develop technological knowledge and an understanding of technological practice, as well as concepts of technology and technology education, if they are to become effective in the teaching of technology.     

高新技术产业集群运行机理研究——基于主导产业的视角

经济学经典理论对于产业集群的研究从多种角度对其产生的原由、发展机制、经济效应以及如何调整集群的发展环境等方面都做了大量而赋有重大意义的研究工作,而理论发展到今天迫切要求对于支持其成长及运行过程的研究。以产业结构和产业组织的相互关系为出发点,以主导产业以及产业集群相关理论为基础,探讨支撑产业集群发展过程的重要力量,并探讨了高新技术产业集群的运行机理。     

The allocative efficiency and conservation potential of water laws encouraging investments in on-farm irrigation technology

Agricultural water conservation statutes are emerging in the West encouraging private irrigators to improve on‐farm irrigation efficiency as a basinwide conservation measure. We investigate whether private improvements promote the economic efficiency and conservation of water use basinwide under a wide variety of hydroeconomic circumstances. The standard of efficiency is how an irrigation district manager should optimally invest in improving the irrigation efficiencies of individual farms located along a stream while internalizing intrabasin allocative externalities of these investments. The results indicate that the popular Oregon legislative model may be the least effective in conserving water and promoting economically efficient water allocation.     

科技企业孵化器运营绩效空间分布及影响因素

为深入研究各省份科技企业孵化器运营绩效空间分布特征及其影响因素，采用2013-2021年各省份样本数据进行实证分析。通过DEA-Malmquist指数模型测算科技企业孵化器运营绩效及其分解效率，探究其空间分布特征，同时采用空间杜宾模型分析影响各省份科技企业孵化器运营绩效的因素。结果表明：国内各省的孵化器运营绩效存在明显差异，导致孵化器运营绩效不佳的主要原因是技术进步减缓；国内科技企业孵化器运营绩效存在显著的空间相关性；经济发展水平、政府支持程度、数字社会建设水平、区域创新活力对科技企业孵化器运营绩效呈显著正向影响且在省份间呈现正向空间溢出现象。基于研究结论，建议通过建立健全孵化网络机制、制定差异化扶持政策、激发区域创新活力等方面进一步推进中国科技企业孵化器运营绩效的提升。