广西长洲水利枢纽工程计算机监控系统研究

文章介绍广西长洲水利枢纽工程计算机监控系统结构、功能、配置及其特点,为水电厂计算机监控系统提供了一种全新的控制方式,同时介绍双CPU双网络的计算机监控系统现地控制单元与其他辅机系统之间使用以太网通讯的方法。     

通过国际交流与合作促进医院发展

随着世界经济一体化进程的加快,医学领域的国际交往也越来越频繁,加强国际交往已成为现代医院更快发展不可缺少的重要战略。作为不发达地区的一所三甲医院,广西柳州市工人医院外事意识也进一步加强．通过国际交流与合作促进了医院的更大发展。文章着重分析该院国际交流与合作的现状、作用和成效。     

公众综合防灾意识测评——以上海市为例

公众防灾意识的减灾效应是城市减灾的基础,是减少灾害损失的有效途径;公众综合防灾意识水平的测算是评价、衡量公众参与救灾、减灾程度与能力的基础。基于系统观念,建立了一套综合评估公民防灾意识水平指标体系,针对上海市民开展实证调查研究。抽样结果显示:上海市民综合防灾意识水平一般;对于城市灾害的关心程度较高,对居住区灾害危险性认识一般,应对突发灾害时,应急避难逃生能力较低;不同特征人群综合防灾意识水平存在差异,且空间分布不均匀。     

Pooling data for the analysis of dynamic marketing systems

Vector autoregressive (VAR) models have become popular in marketing literature for analyzing the behavior of competitive marketing systems. One drawback of these models is that the number of parameters can become very large, potentially leading to estimation problems. Pooling data for multiple cross-sectional units (stores) can partly alleviate these problems. An important issue in such models is how heterogeneity among cross-sectional units is accounted for. We investigate the performance of several pooling approaches that accommodate different levels of cross-sectional heterogeneity in a simulation study and in an empirical application. Our results show that the random coefficients modeling approach is an overall good choice when the estimated VAR model is used for out-of-sample forecasting only. When the estimated model is used to compute Impulse Response Functions, we conclude that one should select a modeling approach that matches the level of heterogeneity in the data.     

湘鄂渝黔边区中小企业竞争力提升的研究

湘鄂渝黔边区中小企业是该地区经济的基础,对国民经济和社会发展起到不可替代的作用,但总量大、规模小,普遍竞争实力不强。文章在全面分析边区中小企业现状和特点的基础上,对如何提升边区中小企业的竞争力进行研究,进而从改善企业发展环境、寻找竞争优势、培育核心竞争力、形成产业集群等方面提出竞争力提升的对策。     

Urban density and pupil attainment

We explore the association between urban density and pupil attainment using three cohorts of pupils in schooling in England. Although—as widely recognised—attainment in dense urban places is low on average, this is not because urban environments disadvantage pupils, but because the most disadvantaged pupils with low average attainments attend the most urbanised schools. To control for this, we exploit changes in urban density faced by pupils during compulsory transition from Primary to Secondary school, and measure educational progress at the end of the Secondary phase, relative to attainment at the end of Primary schooling. Our results suggest that there are small but significant benefits from education in schools in more densely urbanised settings. We detect this density advantage even amongst pupils moving relatively short distances between Primary and Secondary schools within urban areas, so we cannot attribute it to broad urbanisation effects experienced by pupils making rural–urban school moves. A more likely explanation lies in greater school choice and competition between closely co-located educational providers.     

中小企业信贷配给与融资路径选择

目前我国中小企业发展的主要瓶颈是融资困难,文章通过信贷市场上的中小企业信贷配给现象分析,探索中小企业创新型融资路径,以促进中小企业乃至整个国民经济的快速、健康发展。     

田园·生态·城乡绿化融合发展——以许昌城乡统筹发展推进区生态绿地系统规划为例

在城乡一体化发展的新阶段,按照统筹城乡发展和社会主义新农村建设的战略部署,许昌市城乡统筹发展推进区生态绿地系统规划坚持区域整体发展、可持续发展、田园城市等的规划理念,按照<许昌市城乡统筹发展推进区总体规划>所确定的组团式空间布局和紧凑型节点走廊发展模式,以双向思维的方式,充分利用本土景观空间形态,以农田、河流、花木基地等生态因子为组成要素,对各类资源加以保护、开发,构成城乡空间的绿心、绿带、绿道,形成绿色生态网络,与许昌市中心城区、长葛市区一起,形成连续的连接城乡、形态丰富、功能互补、有机融合的城乡生态绿地系统.在区域层次上进行大地园林化探索,为城市化发展新时期的城乡绿色空间规划建设进行有益的尝试.     

配合城市化进程完善税收征管

随着中国城市化步伐加快,经济税源向城市集中,实施配合城市化进程的税收管理改革成为实现中国税收管理现代化的必由之路.本文基于中国城市化进程与税收征管的现状,从城市化与税收征管的互惠发展角度集中分析了城市化进程时税收征管的更高挑战,指出应采取的与城市化进程相配合的现代税收征管改革措施.     

物流系统优化问题研究方法概述

结合物流系统的特点,分析了物流系统中存在的优化问题。并针对一些关键技术问题对近年来国内外有关文献进行梳理和研究。文章首先综述了物流系统中四类组合优化问题以及此类问题的传统确定性算法及智能优化算法,同时分析这些方法在处理不同的问题时各自的优缺点。最后对物流系统优化问题的研究方法及研究方向做了分析和展望。