刍议边坡岩体工程中的瞬态瑞雷波测试方法

瞬态瑞雷波勘探技术广泛用于岩体风化带划分、边坡岩体卸荷深度探测、滑坡体厚度探测与结构划分、覆盖层厚度探测与表层岩土介质分层、建筑物场地地基勘察等方面。与其他地震勘探方法相比，瞬态瑞雷波法工作具有方法简单、所需的激发能量小、排列短、不受介质中饱水程度影响、受场地地形限制小等优点。     

减震沟深度对塌落振动影响的试验研究

塌落振动是建筑物在拆除爆破中存在的主要形式,开挖减震沟是降低塌落振动地震效应的有效措施。利用混凝土块的倾倒来模拟建筑物爆破拆除的倾倒塌落过程,并采集由此产生的塌落振动信号[1]。分析研究了不同深度减震沟的减震效果。试验结果表明:减震效果随着减震沟深度的增加而增加;当深度达到一定数值后,减震效果减弱。     

槽波地震勘探在2125回采工作面地质条件探查中的应用

2125回采工作面掘进过程中揭露褶曲、薄煤区、厚煤区、断层等多处构造,其在工作面内部延伸情况不清,将直接影响工作面安全回采.基于槽波地震勘探透射法原理,对工作面内部构造、煤层赋存情况进行了探测,高精度的控制了构造的延展态势及煤厚特征,探测分析结果可为工作面回采提供科学依据,保障矿井生产安全.     

二维地震勘探在闽西南深部隐伏矿的应用效果分析

地震勘探方法对于解决覆盖区下的控矿构造、与矿体有关的局部不均匀体和隐伏岩体分布等地质问题,具有精度高、探测深度大、分辨率高和探测结果准确可靠等特点。在地质找矿难度日益增大,以寻找盲矿和深部隐伏矿为中心的勘探形势下,地震勘探方法将发挥越来越重要的作用。通过检验,该方法在闽西南武夷山成矿带,推覆构造覆盖隐伏矿勘探实际应用中取得了很好的地质效果,具有一定的借鉴价值。     

直流高密度电法在地质灾害治理中的效果和作用

根据皖南地区地质灾害的实际特点,能用于山区地质灾害勘察的物探方法相对较少,浅层地震探测基岩面法是工程物探的首选方法,但当遇到山区相对高差大,地形切割强烈,植被发育茂密且腐殖层厚度很大时,声波信号受屏蔽导致地震探测失效;因此尝试采用直流高密度电法探测山区覆土层厚度和基岩面起伏情况。根据物性标本观测资料建立模型并进行正反演计算分析,通过对休宁县七里顶地质灾害物探方法勘查实例,证实直流高密度电法可以获得较为理想的探测效果。在局部地形较平缓、地震反射波有效的区段进行两种物探方法的综合解释,可以提高解释的可靠性及解释精度。科学、合理地应用物探中各种方法,提高物探成果的解释精度,减少人为因素干扰,为皖南地区地质灾害治理工作提供可靠的理论依据,为灾害治理工程建设提供技术支持。     

声波透射法缺陷识别能力的讨论

将物理模型置于水中,利用声波透射法在不同测距和深度的情况下,对比各组数据的波速、波幅、波形等几个因素分析超声波法的缺陷识别能力。同时也讨论了影响声波透射法的缺陷识别能力的主要因素,初步总结了不同测距情况下声波透射法对同一几何大小缺陷的辨别能力。     

声波透射法在混凝土灌注桩桩身完整性检测中的应用

对于大直径混凝土灌注桩的检测来说声波透射法是当前最可靠的方法之一,能够相当准确的判别桩的各类缺陷。本文介绍了声波透射法的基本原理,在检测过程中需要注意的各类问题。通过现场检测实例提出了桩身存在缺陷时声学参数的几种特征。     

槽波地震勘探在煤矿中的应用

概述了槽波地震的勘探方法及基本原理。利用透射槽波勘探法和反射槽波勘探法来圈定构造所在位置，为采场布置提供依据。     

桩基检测中钻孔取芯法与声波透射法浅探

钻孔取芯法和声波透射法在桥梁基桩完整性评价中是比较准确可靠的，必要时可结合反射波法进行综合评价。     

软土地下建筑物地震保险研究

文章提出采用地震保险的方法转移软土地下建筑物在施工期间和运营期间可能出现的地震风险,并在软土地下建筑物地震风险分析及地震风险评估的基础上进行地震保险费率的初步研究,提出我国软土地下建筑物地震保险可采用的模型.     

Choice in Currency in Iceland

An Icelandic post-graduate student at Oxford outlines a method of preventing inflation that could be applied in other countries.     

关于高职院校数学教学中开放题的有关问题初探

本文着重于讲解在高职院校数学教学中常出现的几种开放题,对它们的解法加以研究,归纳其一般思路、解法及其解答技巧,希望能有助于今后高职院校数学教学研究活动,供参考之用。     

Developments in human resource management in manufacturing in modern Britain

In this paper, developments in human resource management in manufacturing in modern Britain based on a national sample are examined. The organization and role of human resource management, employee involvement, training and development, work practices and rewards are all targeted for an assessment of current practices. This is a prelude for a contrast between manufacturing and non-manufacturing. The conclusion is that the similarities between manufacturing and non-manufacturing substantially outweigh the differences. By inference, too, developments in human resource management practices are likely to reflect changes in the broader environment of businesses (and differences between companies) rather than being specific to the main industrial sectors.     

Explaining Inter-Provincial Inequality in Productivity Growth in Crop Production in Pakistan

Abstract

Data on crop production are assembled for four provinces—Punjab, Sindh, North-West Frontier Province and Balochistan—for the period from 1980/81 to 2005/06 to examine inter-provincial differences in productivity growth rates. Propositions are put forward and examined to explain the superior productivity performance of Punjabi crop producers over those in Sindh and North-West Frontier Province, and the unusual productivity trends in Balochistan. The major factors relate to economic infrastructure and human capital. The impact of agricultural research is difficult to discern, and further work is required to assess the lagged effects of research expenditures on TFP growth.

Explication des déséquilibres interprovinciaux dans l'augmentation de la productivité dans la production de cultures au Pakistan

RÉSUMÉ On a rassemblé des données pour les quatre provinces suivantes: Penjab, Sindh, Khyber-Pakhtunkhwa, et Baloutchistan, pour la période 1980/81 à 2005/06, afin d'examiner les différences interprovinciales dans les taux d'expansion de la productivité. On présente et on examine des hypothèses pour expliquer le rendement supérieur des producteurs du Penjab par rapport à ceux du Sindh et du Khyber-Pakhtunkhwa, ainsi que les tendances de productivité inhabituelles du Baloutchistan. Les principaux facteurs se rapportent à l'infrastructure économique et au capital humain. L'impact de la recherche sur l'agriculture est difficile à établir, et des travaux supplémentaires seront nécessaires pour évaluer les effets décalés des frais de recherche sur l'expansion du TFP.

Explicación de la desigualdad inter-provincial en el crecimiento de la productividad de la producción de cultivos en Pakistán

EXTRACTO Se recopilan datos sobre la producción de cultivos de cuatro provincias: Punjab, Sindh, Provincia de la Frontera Norte-Oeste y Balochistan, durante el período de 1980/81 a 2005/06, para examinar las diferencias inter-provinciales en los índices de crecimiento de la productividad. Se plantean y examinan propuestas para explicar el mayor rendimiento de la productividad de los productores de cultivos Punjabi con respecto a los de Sindh y la Provincia de la Frontera Norte-Oeste, y las inusuales tendencias de la productividad de Balochistan. Los factores principales se relacionan con la infraestructura económica y el capital humano. El impacto de la investigación agrícola es difícil de discernir, y se requiere más trabajo para evaluar los efectos retrasados de los gastos de investigación en el crecimiento TFP.      

西部外贸中小企业发展的战略选择

中小企业是西部地区外贸进出口的重要力量。据统计，2005年，西部地区中小企业的进出口额达156．03亿美元，占西部地区进出口总额的34．6％，同比增长37．5％，表现出强劲的发展势头，成为推动西部地区对外贸易发展的一支最具活力的力量。然而，与东部地区同类企业发展相比，由于受区域经济发展水平、思想观念、经营环境以及政策等多种因素的影响和制约，西部外贸中小企业的发展还明显滞后。     

LOFT小户型走俏京城

去年热播的电视剧《奋斗》有一个场景受到广泛关注,剧中那群青春偶像聚集在一个旧厂房改造成的LOFT里共同生活,这一方式成为众多年轻人向往的目标。而近期北京的LOFT小户型楼盘一经推出就受到热烈追捧,在冷清的楼市里点燃了"一把火"。"没错,我们的开发商就是受到《奋斗》的启示,才开发了这么一款LOFT产品。"美利山西区中心的小户型楼盘"LOFT精妆寓所"置业顾问李先生直言不讳地对记者表示。     

Trends in local government in Europe

Abstract

The article explores which reform trends are expected to play a significant role in the further development of local government in European countries. Analysis is based on an adopted Delphi survey of (mainly academic) local government experts from thirty-two countries. Results include a list of trends structured by the perceived importance for the coming ten years. Redistributing responsibilities and duties across levels of government constitute the highest ratings out of all trends. Furthermore, results do not provide clear evidence to support a shift from public management to governance as has recently been proclaimed in academic debate and literature. Management topics continue to be of great importance. Last but not least, clusters extracted point to different reform groups, which highlight more reluctant or enthusiastic attitudes to the relevance of the suggested trends of the study.     

Trends in multiculturalism in health care

Materiel managers are faced with a shrinking world and changing work environment. The needs and expectations of the customer have shifted because of the increasing number of multicultural groups. These groups will continue to assert their right to culturally sensitive care. Materiel managers also need to learn to support and enhance the skills of a multicultural work force. One important tool for change will be technology. However, technology that brings the world closer together also creates new challenges for managers, who will have to deal with multicultural colleagues, buyers, sellers, and manufacturers of goods and services.     

Errors in variables in panel data

Panel data based studies in econometrics use the analysis of covariance approach to control for various ‘individual effects’ by estimating coefficients from the ‘within’ dimension of the data. Often, however, the results are unsatisfactory, with ‘too low’ and insignificant coefficients. Errors of measurement in the independent variables whose relative importance gets magnified in the within dimension are then blamed for this outcome.Errors-in-variables models have not been used widely, in part because they seem to require extraneous information to be identified. We show how a variety of errors-in-variables models may be identifiable and estimable in panel data without the use of external instruments and apply it to a relatively simple but not uninteresting case: the estimation of ‘labor demand’ relationships, also known as the ‘short-run increasing returns to scale’ puzzle.