自然类比法在黄土路堑边坡设计中的应用研究

根据目前黄土地区公路路堑边坡设计仍以自然类比法为主要设计依据的现状,以陕西黄土自然边坡为调查研究对象,提出极限状态坡的定义及鉴别标志。测量了79个陕北至关中黄土极限状态坡,并将其按地形地貌、粒度组成和抗剪强度特征等的差异,划分为3个地段进行对数线性模型回归和不同置信度下的统计分析,给出3个地段不同置信度下坡高与坡度的相关关系,将自然类比法从各工点的定性分析转化为系统的定量分析。结果与目前已修建的黄土路堑边坡对比,认为量化的自然类比法可以作为黄土路堑边坡设计的一个系统方法。     

区域经济非均衡发展的实证研究 — 论新亚欧大陆桥经济带东、中、西部开发策略

新亚欧大陆桥经济带的开发时至今日虽已取得了较大的进展,但是由于资源禀赋、区位条件、资源配置效率、产业结构等方面的原因,经济带各地区的发展极为不均衡.论文从实证的角度对此问题进行了研究,并就新亚欧大陆桥经济带协调发展提出一些相应的对策及建议.     

The 2008 New Zealand public transport management act: Rationale, key provisions, and parallels with the United Kingdom

In January 2009, following a lengthy industry review and consultation process, the New Zealand Public Transport Management Act (PTMA) came into force. The Act allows Regional Transport Authorities, as the primary procurers of public transport services, to place either a control or a contracting requirement upon services that are registered as commercial requiring no subsidy. The imposition of either the control or the contracting requirement is designed to facilitate greater system integration, improve service continuity and enhance services to the customer, andallow the Authority to invest in key strategic projects, such as integrated fares and ticketing, so as to grow patronage.The PTMA’s other objective is to ensure improved value for public subsidies. Recent years have seen significant subsidy inflation for seemingly little commensurate benefits. The Act will allow the Regional Transport Authority to achieve greater value for money through improved farebox, a shift to longer, larger contracts to increase competition in the market, a more appropriate allocation of risk, and the removal of the ability of operators to ‘game’ the current system by using strategically placed commercial services as barriers to competition.Similar concerns have also stimulated new legislation in the UK and this paper illustrates the parallels in the environment and proposed response.     

两次气旋影响风暴潮过程的天气学特征分析

滨海新区风暴潮灾害日益频繁,在统计历史风暴潮及强增水个例的过程中发现了一些规律。主要结论:两次过程在发生风暴潮最高潮位之前的一个天文低潮位时增水出现激增的现象。两次过程高空形势都是一槽两脊。地面形势为江淮地区锋生形成闭合气旋。两次过程气旋移动路径非常相似,均由江苏境内北上,沿山东沿海向东北登陆朝鲜半岛。两次过程增水的激增也都与气旋北移有密切关系。塘沽站与成山头站海平面气压差与增水有较好的相关性。     

新大纲《海图作业》评估项目内容探讨

对新的《中华人民共和国海船船员适任评估大纲和规范》中,《海图作业》评估项目（甲类）的内容进行探讨,并对《海图作业》评估项目,必须增加《记录航海日志》评估内容的重要性进行论述,同时提出了建议和评估标准．     

北京新机场线服务标准研究

北京新机场线是连接首都第二国际机场与中心城的轨道交通专线,其服务对象、功能需求、运营目标与普通地铁线路差异巨大。基于对公交系统运营要素的认识,站在城市轨道交通运营设计的角度,以落实运营需求及标准为目标,对新机场线应具备的服务标准予以探讨,重点落实速度标准、舒适度标准以及发车间隔、可靠性等指标分析。     

兰州市区至兰州新区中快线建设方案研究

对兰州市区至兰州新区中快线建设条件分析,研究其合理的建设方案。通过对中快线在兰州至兰州新区3条规划交通廊道的作用和定位分析,采用交通量预测、调查选线、经济估算等方法,研究了中快线建设所涉及的若干关键技术问题,指出中快线建设是十分必要的,其南端宜同时建设3条连接线与兰州市区连接,北端应与兰州新区南绕城及经十三路连接,主线宜采用120km/h设计速度、双向六车道标准,可采用城市快速路或高速公路模式建设,且通道内具有预留轻轨建设条件。     

Seaport Development and Coastal Management Programs: A National Overview

Oysters have been harvested on the east coast of Australia for many thousands of years. Coastal Aboriginal communities used the extensive estuarine oyster resource and may have farmed oysters by establishing shell cultch beds in shallow areas of estuaries. The British colonization of Australia commenced in 1788 and oysters were initially used for food and production of lime. Concerns about unsustainable exploitation led to introduction of legislation that directed the oyster industry to aquaculture in 1884. Translocation of oyster stock for fattening, from New Zealand to Australian east coast estuaries, was encouraged. Here evidence is presented that this activity resulted in “mudworm disease” appearing in oyster farming estuaries on the Australian east coast between 1880 and 1900. The pandemic permanently destroyed natural sub-tidal oyster reefs and forced the oyster industry to adopt avoidance farming techniques including intertidal farming to cope with mudworm.     

结合工程实例浅谈兰州新区地基处理经验

兰州新区主要的特殊路基为湿陷性黄土路基,地基处理方案不能一概而论,需结合湿陷性等级分段、道路填挖方分段、沿线建筑物分布及各个工程特点分段进行确定,结合兰州新区北斗路的建设,总结了兰州新区地基处理的几点经验,供道路专业人员参考。     

“通过噪声”新法规对NVH的挑战

为解读新版《汽车加速行驶车外噪声限值及测量方法》征求意见稿提出的各项要求及方法,从试验条件、试验方法及结果处理等方面,阐述了新旧法规测试方法的差异。在按照新法规方法对某款汽车进行试验后,通过排除法对影响其通过噪声的各项因素进行了定性分析,总结出各系统影响所占的百分比。对于汽车企业未来开发车型如何满足新法规各项要求具有一定的指导意义。