论如何提高建筑企业合同管理工作水平

重点阐述合同管理的重要性及合同在签订、履行等方面的一些控制措施和存在问题的解决办法,可为同行提供参考和借鉴。     

Coastal erosion and sea level rise: Implications for ocean beach and San Francisco's westside transport project

Abstract

One of the consequences of sea level rise resulting from the greenhouse effect is increased coastal erosion. This article discusses a model of erosion that can be used to estimate the response of beaches to sea level rise. The model is applied to Ocean Beach, California, with particular attention to the consequences of accelerated erosion for the San Francisco Westside Sewer Transport. Results obtained show that erosion produced by accelerated sea level rise could cause substantial damage to the structure. Large expenditures on beach nourishment will be required to protect the transport and the recreational value of the beach.     

浅谈远程职业教育模式

随着社会的发展,社会分工的细化和人才的需要,远程职业教育的重要性愈加体现,其作为远程教育体系结构中的薄弱环节将会被大力发展。该文就远程职业教育的服务对象、教学实施和质量控制等问题阐述了一定的观点。     

浅议公路养护企业风险管理的实施步骤及主要内容

随着企业经营规模和经济总量的高速增长,公路养护基础管理发展跟不上经济规模发展的矛盾日益凸显。构建全面风险管理体系,已经成为完善公路养护企业治理机制的重要内容。公路养护企业应将风险管理应用于企业战略制定、投融资决策、财务报告管理等各个方面,建立有效的风险控制体系,以提高风险防范能力,增强核心竞争力,保证企业经营安全、稳健运行,因此本文从风险管理的实施步骤和主要内容方面进行论述,研究公路养护企业风险管理的重要内容,以期为行业发展提供借鉴。     

Efficient multiple model particle filtering for joint traffic state estimation and incident detection

This article proposes an efficient multiple model particle filter (EMMPF) to solve the problems of traffic state estimation and incident detection, which requires significantly less computation time compared to existing multiple model nonlinear filters. To incorporate the on ramps and off ramps on the highway, junction solvers for a traffic flow model with incident dynamics are developed. The effectiveness of the proposed EMMPF is assessed using a benchmark hybrid state estimation problem, and using synthetic traffic data generated by a micro-simulation software. Then, the traffic estimation framework is implemented using field data collected on Interstate 880 in California. The results show the EMMPF is capable of estimating the traffic state and detecting incidents and requires an order of magnitude less computation time compared to existing algorithms, especially when the hybrid system has a large number of rare models.     

An Original Feedback Control with a Reversible Electromechanical Actuator Used as an Active Isolation System for a Seat Suspension. Part I: Theoretical Study

This paper provides an overview of a theoretical study of an active seat suspension. The principal objective of this study is to improve ride passenger comfort by reducing transmitted seat acceleration. The seat is represented by a non-linear two degree of freedom model. The system is linearized for small perturbations around the equilibrium. To control the dynamic of the seat suspension, an original feedback control command with a reversible electromechanical actuator is achieved. The synthesis of the regulator is realized on the linearized model of the seat suspension and the root locus method is employed. Stability and robustness characteristics have been studied. Numerical simulations in time and frequency domain show the interests of the regulator and its capability to isolate seat passenger.     

基于Autodesk平台的山区隧道BIM应用研究

为有效解决隧道建模标准化、三维实体精确化、施工管理信息化等问题，以邹平县广富隧道为例、Autodesk平台为基础，根据设计图纸内容对隧道整体结构进行细分，形成一套成熟的隧道建模规则命名体系。采用Civil 3D+Dynamo+Revit软件交互实施体系，实现对隧道建模的精细控制；采用中建八局BIM协同管理平台对施工全过程进行信息化管理，该平台优势在于以Autodesk平台精细模型的各构件为信息源，并以此为选择基础，提出对项目生产、质量、安全、设计、资料等的全方位管理；同时，模型、资料、审批信息等内容相互关联，真正实现工程资料闭合。     

我国批准加入《2006年海事劳工公约》的可行性探讨

通过简述《2006年海事劳工公约》的出台背景以及目前各成员国批约的情况,联系我国实际,从政府、船员和船东三方角度,通过对国家政策、法律法规、海员保障、船东准备等方面履约的可行性分析,认为我国加入公约时机基本成熟,并提出了加入公约后可能面临的问题以及解决的建议。     

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为改善过饱和状态交叉口群的交通控制效果,优化了交通控制目标和结构,制定了信号配时方案优化的实施框架. 在分析溢流、滞留排队和阻挡等拥堵诱因的基础上,根据优化过饱和状态交通控制的需求,选取关键路径上通过车辆数最大和平均排队最小作为优化目标. 在单点交叉口层和交叉口群层间增加关键路径层,优化交通控制结构. 结合过饱和状态交叉口群交通控制特性,提出信号配时方案优化的实施框架及分层优化措施. 南京市广州路交叉口群仿真验证结果表明, 按信号配时优化框架建立的配时算法,可显著增大交叉口群内关键路径的通过车辆数,降低平均排队长度,改善过饱和状态交叉口群交通运行状况.     

浅析基于云火墙的网络安全

计算机网络安全是现在的行业焦点。网络安全最新的技术、新一代防火墙———云火墙,就是一个很好的解决方案。云火墙遵循了主动防御的思想,是防火墙的进一步发展。它把防火墙提升到了一个新的高度,给网络安全带来了新的生机。本文提出通过云火墙可构建一个新型、安全的网络框架。