供应链伙伴企业选择评价指标的界定研究

企业要想成功的实施供应链管理,伙伴企业的选择是其首要应该解决的问题.而伙伴企业选择的评价指标体系则是选择一个最佳合作伙伴的基础和依据.首先分析了现有伙伴企业选择评价指标体系的特征及其局限性和指标体系构建的目的与界定原则.在此基础上,运用"目标-系统"法构建了新的供应链伙伴企业选择评价指标体系.     

南京长江三桥深水基础钢套箱施工

深水基础施工是大桥施工的重点,如何合理地选择其施工方案是保证大桥按期顺利完成、降低工程造价的关键。本文介绍了长江三桥钢围堰施工方案的比选及其施工要点,以供参考。     

信息不对称下交通运输管理中的最优激励

应用信息经济学的委托代理理论,将政府作为委托人,交通运输管理人员作为代理人,研究了在委托人对代理人的能力水平有不完全信息的逆向选择和在管理活动中代理人的努力程度等行为不可能跟踪监督的道德风险同时存在的广义委托代理中的最优激励机制.通过建立非线性规划的数学模型,获得了在风险中性的委托人为具有"勤能补拙"特征的风险厌恶的代理人设计的最优激励工资合同的混同均衡的显式解,混同的工资合同解释了岗位工资的合理性和激励作用.     

隧道通过岩溶和采空区施工方案探讨

 武广铁路客运专线新南岭隧道断面大,洞体穿越岩溶区、煤层采空区等不良地质段,施工中多次遇到难以克服的困难,为此,采取多种方案综合比较研究,最后确定合理方案穿越,解决了工期等诸多问题。     

Hepatic CT image query based on threshold-based classification scheme with gabor features

Hepatic computed tomography(CT) images with Gabor function were analyzed.Then a threshold-based classification scheme was proposed using Gabor features and proceeded with the retrieval of the hepatic CT images.In our experiments, a batch of hepatic CT images containing several types of CT findings was used and compared with the Zhao's image classification scheme, support vector machines(SVM) scheme and threshold-based scheme.     

Identity-based verifiably committed signature scheme without random oracles

An identity-based verifiably committed signature scheme （IB-VCS） was proposed, which is proved secure in the standard model （i.e., without random oracles）. It enjoys the setup-free property and stand-alone property, both of which make an exchange protocol more practical. The scheme is unconditionally secure against the cheating signer, its security against the cheating verifier is reduced to the computational Diffie-Hellman （CDH） problem in the underlying group, it is secure against the cheating trusted third party if the underlying Paterson Schuldt＇s identity based signature （IBS） scheme is secure, which is proven true based on the CDH assumption in the standard model.     

西沟隧道棚洞方案比选

随着山区高速公路的修建,沿河傍山段高速公路越来越多。针对某高速公路西沟隧道段沿河傍山的特点,对该段设计方案拟定了路堑开挖、偏压明洞、棚洞方案三种方案进行比选,可为类似工程项目提供借鉴和参考。     

传统燃油车的电动化改制方案研究

文章以前置后驱的传统燃油车改制为前置前驱的纯电动汽车案例,展开整车设计分析,在维持原型车的外形、长宽高、轴距和轮距等基本参数的基础上,提出了整车布置结构变化的改制设计方案,设定了电动车整车主要性能指标。在电动化设计中取消了传统燃油动力总成及其附属的燃油、进排气等系统,依据整车性能目标要求,结合车辆空间及整车结构原理,对驱动电机动力总成、电池PACK、VCU、PDC三合一等高压系统零部件进行选型及布置设计。     

公路施工监理招投标管理现状及建议

根据多年投标工作经验,结合我国公路工程施工监理招投标管理现状,分析公路工程施工监理招投标中的投标备案、资格审查、开标与定标等过程中存在问题,并提出相关建议,以改善公路工程施工监理招投标管理.     

The visual effects of port redevelopment alternatives

Abstract

In the early 1970s, Seattle Piers 90/91 were declared surplus federal property by the GSA. These obsolescent half‐mile‐long piers and their adjacent uplands were purchased by the Port of Seattle for redevelopment. This urban waterfront site of almost 200 acres presents the Port of Seattle with a number of severe planning problems. While it is the last large deep‐water site on Elliott Bay, it is also in a very sensitive location, since it is overlooked on two sides by vocal residential communities with a history of active intervention in development projects on visual and other environmental grounds.

At Piers 90/91, public concerns over the visual effects of port redevelopment include:

1. nuisance effects of night‐operations lighting on adjacent hillside residences;

2. nighttime obstruction of distant views due to increased foreground illumination;

3. day and night view obstruction by tall structures such as container‐handling cranes;

4. alteration of the character of both day and nighttime views by new port facilities.

As part of a program to study the effects of alternative redevelopment strategies for Piers 90/91, the Port has undertaken a through examination of the visual effects of different uses, their visual appropriateness, and the ways by which adverse visual effects can be mitigated. The results were incorporated into an environmental impact statement which documented compliance with the Seattle Shoreline Master Program and with view protection and glare provisions of the City's S.E.P.A. guidelines.

A systematic Visual Resource Management (VRM) approach was successfully employed on this coastal zone project. Major elements included visibility mapping, key view selection, analysis of existing visual character, simulation of alternatives, assessment of relative visual compatibility, and determination of effective mitigation measures. Community involvement has also been a critical element in this approach to assessing and managing the visual effects of redevelopment in a major urban port.