Assessment of traffic noise and its impact on the community

Road transportation plays a major role in the economic and social development of a country. With the increase in vehicle population, noise levels will increase. This paper discusses the results of a study undertaken to assess the noise levels at the major traffic junctions of an urban city. The noise equivalent level L _eq was measured in the community areas as well as at the traffic junctions. The statistical levels L₁₀, L₅₀, L₉₀ were also measured to determine the Traffic Noise Index at the junctions. A holistic approach was adopted to study the impact of noise on the community and at the work place of an industry.     

浅析就地爆破浸出深孔筑堆方式

根据就地爆破浸出法溶浸机理的要求，对爆破筑效果提出了一些特殊的要求，分析了深孔筑堆的可行性及存在的主要问题，深孔筑堆方案选择的方法，并对某些爆破技术地探讨。文章的最后列出了仁化铀矿深孔筑实例及爆破效果分析。     

Efficient Algorithms for Block-Cyclic Redistribution of Arrays

The block-cyclic data distribution is commonly used to organize array elements over the processors of a coarse-grained distributed memory parallel computer. In many scientific applications, the data layout must be reorganized at run-time in order to enhance locality and reduce remote memory access overheads. In this paper we present a general framework for developing array redistribution algorithms. Using this framework, we have developed efficient algorithms that redistribute an array from one block-cyclic layout to another. Block-cyclic redistribution consists of index set computation , wherein the destination locations for individual data blocks are calculated, and data communication , wherein these blocks are exchanged between processors. The framework treats both these operations in a uniform and integrated way. We have developed efficient and distributed algorithms for index set computation that do not require any interprocessor communication. To perform data communication in a conflict-free manner, we have developed direct indirect and hybrid algorithms. In the direct algorithm, a data block is transferred directly to its destination processor. In an indirect algorithm, data blocks are moved from source to destination processors through intermediate relay processors. The hybrid algorithm is a combination of the direct and indirect algorithms. Our framework is based on a generalized circulant matrix formalism of the redistribution problem and a general purpose distributed memory model of the parallel machine. Our algorithms sustain excellent performance over a wide range of problem and machine parameters. We have implemented our algorithms using MPI, to allow for easy portability across different HPC platforms. Experimental results on the IBM SP-2 and the Cray T3D show superior performance over previous approaches. When the block size of the cyclic data layout changes by a factor of K , the redistribution can be performed in O( log K) communication steps. This is true even when K is a prime number. In contrast, previous approaches take O(K) communication steps for redistribution. Our framework can be used for developing scalable redistribution libraries, for efficiently implementing parallelizing compiler directives, and for developing parallel algorithms for various applications. Redistribution algorithms are especially useful in signal processing applications, where the data access patterns change significantly between computational phases. They are also necessary in linear algebra programs, to perform matrix transpose operations. Received June 1, 1997; revised March 10, 1998.     

体重指数BMI与两种富裕性疾病患病率的关系

本文基于上海延吉社区1.7万多人的调查结果,从统计的角度出发,分性别、年龄讨论了BMI与两种富裕性疾病患病率之间的关系。     

基于强度折减法的边坡安全系数求解及精度影响因子分析

本文介绍了FLAC3D中强度折减法的基本原理和边坡安全系数求解的实现过程,基于实例分析,从剪胀角、抗拉强度、网格疏密程度及边界范围四个方面探讨了这些因素对FLAC3D强度折减法计算结果的影响,为FLAC3D边坡稳定性分析中强度指标的选择提供理论依据。     

The energy intensity in Lithuania during 1995–2009: A LMDI approach

The measurement, assessment, and effective mitigation of energy intensity compose a foremost objective of contemporary energy policy. Although the European Union (EU) Member States have been experiencing the convergence in energy efficiency indicators, Lithuania, acceded to the EU in 2004, still remains peculiar with relatively high energy intensity. Our study, therefore, is aimed at analyzing the energy intensity trends in Lithuanian economy as a whole as well as in separate economic sectors. The investigation covers the period of 1995–2009. The Logarithmic Mean Divisia Index was applied for decomposition analysis. Our analysis has shown that energy efficiency falls during economic downturn. In order to facilitate these challenges the Lithuanian Government as well as business should opt for increasing energy efficiency in the most problematic sectors of transport and services. In addition, the analysis of legal acts, namely National Energy Efficiency Programme for 2006–2010 and Energy Efficiency Action plan for 2010–2016, was taken into consideration. Some suggestions, thus, were offered for successful implementation of strategic goals outlined in the aforementioned strategic documents.     

An alternative measure of the ICT-Opportunity Index

We developed an alternative approach for measuring information and communication technology (ICT), applying Data Envelopment Analysis (DEA) using data from the International Telecommunications Union as a sample of 183 economies. We compared the ICT-Opportunity Index (ICT-OI) with our DEA-Opportunity Index (DEA-OI) and found a high correlation between the two. Our findings suggest that both indices are consistent in their measurement of digital opportunity, though differences still exist in different regions. Our new DEA-OI offers much more than the ICT-OI. Using our model, the target and peer groups for each country can be identified.     

Application of the Water Poverty Index at Different Scales: A Cautionary Tale

Abstract

The Water Poverty Index is an integrated tool developed on the basis of extensive consultation with a range of scientists, practitioners and policymakers. It is primarily designed for use at the community level to enable more holistic water-resource assessments on a site-specific basis. It can however be applied at different scales to suit different needs. One of the motivations to design such a tool was an attempt to move away from the conventional, purely deterministic, approaches to water assessment, relying primarily on models and large-scale data. In today's world such an approach is inappropriate, ill representing the complexities of modern water-allocation decisions where economic, political and social issues all have a powerful role to play. This paper highlights some applications of the Water Poverty Index at different spatial scales and discusses the implications of applying indicators at these different scales.     

基于改进的GAHP确定雷达组网作战效能的指标权重

雷达组网系统复杂、涉及因素多，且部分因素存在信息不完全性和不确定性，针对经典层次分析法求指标权重值不够客观且需要进行一致性检验的缺点，提出改进的灰色层次分析法。先变换灰数判断矩阵，再求单一准则下元素的相对权重，即根据现有层次所有元素相对上一层次的重要性进行排序。由于该解自然满足一致性，故不需要进行一致性检验。例证表明该方法行之有效。     

基于模糊综合评价法的遥控武器站火力打击能力评价

分析遥控武器站的火力打击能力，建立综合评价指标体系，运用多层次模糊综合评价方法，解决遥控武器站火力打击能力的评价问题。该评价不仅综合考虑多种因素影响，而且从模糊关系矩阵的形成，到权重向量的确定都充分重视各位专家的定性分析，通过将其量化并进行科学的计算，得出合理的判断结果。该方法不仅可用于单个系统作战性能的评价，而且可对多个系统作战性能进行比较。