公路工程竣工验收现场核查工作的重要性

公路工程竣工验收是工程项目建设全过程中的最后一个环节,是全面考核和评价建设成果、检查工程实体是否符合设计要求和评定工程质量等级的重要环节.现场核查作为竣工验收工作的一部分具有十分重要的意义.鉴于此,在分析竣工验收的主要目的、作用及应具备的条件的基础上,详述了开展现场核查的必要性,现场核查的人员构成、主要职责、工作内容以及工作成果等,以期为同行提供一定的参考与借鉴.     

Commuters’ acceptance of and behavior reactions to license plate restriction policy: A case study of Tianjin,China

License plate restriction (LPR) policies are currently being implemented in major Chinese cities with the aim of mitigating traffic congestions. Meanwhile, much controversy regarding the effectiveness of the LPR policies is arising. To better understand the impact of the LPR policies, this paper studies commuters’ acceptance of and behavior reactions to the policies after their implementation. A theoretical model was proposed as the first step, followed by a questionnaire survey that was conducted in Tianjin, China, where an LPR policy has been in place since March 2014. Car owners frequently commuting within the restricted area were sampled as respondents, and a multi-variable regression method was employed to analyze the collected survey data. The results indicate that it is necessary to promote public’s acceptance of the LPR policy, because lower acceptance will lead to more negative reactions towards the policy, which may weaken its effectiveness. Main factors affecting the level of acceptance of the policy are also found, which may serve as a reference for transportation authorities seeking to increase commuters’ acceptance of the policy. These findings are beneficial to designing and implementing LPR policies.     

Using the sustainable modified TAM and TPB to analyze the effects of perceived green value on loyalty to a public bike system

This article explores the effects of perceived green value, perceived green usefulness, perceived pleasure to use, subjective norms and perceived behavioral control on green loyalty to a public bike system. The mediators between perceived green value and green loyalty and a moderator of general attitude toward protecting the natural environment are also discussed. The aim of this research was to understand how to establish green loyalty via the other dimensions based on the sustainable modified technology acceptance model (modified TAM), the theory of planned behavior (TPB), and a moderator. The findings reveal that perceived pleasure to use and subjective norms have the strongest power to influence loyalty for both users and non-users. The implications of this finding are that fun in people’s lives has a strong influence on sustainable continuous use of public bikes, and that subjective norms are more effective for non-users. In addition, environmental attitude has stronger moderating effects for non-users than for users on perceived green usefulness, perceived pleasure and subjective norms. Therefore, governmental policies should promote the attitude of protecting the natural environment, perceptions of pleasure, and subjective norms so as to increase green loyalty to public bike-sharing.     

The Integrated Model on Mobile Payment Acceptance (IMMPA): An empirical application to public transport

This study examines the users’ acceptance and usage of mobile payments, focusing on the mobile ticketing technologies applied in a public transport context. We investigate the main predictors of the intention to use mobile ticketing and the relation between those predictors, considering the prominent literature on users’ technology acceptance background and extending the knowledge through an innovative contribution. The main models of reference in this study are the Technology Acceptance Model (TAM), the Diffusion of Innovation Model (DOI) and the Unified Theory of Acceptance and Use of Technology (UTAUT) model. The new model that we proposed is called the Integrated Model on Mobile Payment Acceptance (IMMPA), and it was designed specifically for mobile payments in the public transport, on the basis of the models previously mentioned. It was developed by mixing the variables of the existing models and adding new ones tailored to the mobile payment/ticketing framework. The theoretical framework was tested using the Structural Equation Models. The results show that the intention to use a technology is affected by the Usefulness, Ease of use and the Security of that technology. Moreover, the Usefulness is simultaneously influenced by the Ease of use, the Compatibility with users’ values and needs and their Attitude towards mobile services. Furthermore, the model confirms the direct relation between the intention to use a technology and its actual usage. The new predictor, that is the Attitude towards mobile services, includes those requirements that every mobile ticketing payment must address in this context: complete information, further information about time and delay, speed of use, intuitive interface, and path customisation. Another new construct detected is the Security, in reference to mobile payment. Because it could represent an obstacle to mobile ticketing distribution, it must be considered by market operators. The originality of the paper addresses the realisation of a new model, the IMMPA, which was specifically designed for mobile payment in the public transport.     

高速公路绿化工程验收中的抽样方法研究

高速公路绿化工程验收是高速公路绿化工程质量监理的一项重要内容，我国目前尚元规范对验收方法做出统一的规定，实践中采用的验收方法也普遍缺乏严密的科学论证．文中结合湖北省孝襄高速公路第9合同段绿化验收实践，运用整群抽样与等距抽样相结合的方法对高速公路绿化工程验收方法做了探讨，在理论论证的基础上，提出了实际监理验收的方法。     

《铁路电力牵引供电工程施工质量验收标准》修订的主要特点及内容

为适应铁路跨越式发展 ,强化施工质量验收 ,新的《铁路电力牵引供电工程施工质量验收标准》已于 2 0 0 4年1月 1日起实施。为使广大设计、施工、监理、建设有关人员更好地理解和应用 ,拟就修订的主要特点和内容进行有重点的说明     

机车淋雨试验系统指标的确定

铁道机车及车辆在做淋雨试验时,淋雨试验系统的淋雨强度及均匀度均对机车和车辆的密封试验结果产生影响。文章从影响强度和均匀度的几个方面阐述在固定式淋雨系统设计中如何保证强度和均匀度,并对强度和均匀度验收提出建议。     

钢质浮标（浮体）验收办法分析

从验收要求、验收规则、验收程序和验收方法4个方面对钢质浮标（浮体）的验收办法进行了分析,为了方便浮标使用单位做好钢质浮标（浮体）验收记录工作、界定停止验收的条件,编制了钢质浮标（浮体）验收记录表,使验收工作具有了可操作性。     

定位像素篡改的安全脆弱水印算法

脆弱水印用于鉴定数字媒体的真实性和完整性,篡改检测性能和安全性是脆弱水印算法的两个重要指标。本文提出一种基于密钥生成和嵌入像素水印信息的安全脆弱水印算法,在不增加水印嵌入容量的前提下,采用邻域像素比较的篡改检测方法有效提高算法的篡改检测性能。本文首先利用混沌迭代生成水印信息,然后将生成的水印信息置乱加密后嵌入在原始图像的最低位。认证时,通过比较像素邻域中不一致像素数目与设定阈值的关系判定像素的有效性,并推导给出阈值的动态选取方法和篡改比例与虚、漏警概率关系。理论分析和实验结果表明该算法不仅能抵抗拼贴攻击(Collage Attack),而且提高精确定位水印算法的篡改检测性能。     

综合大联调期间车辆专业的联调及演练

通过参与西安地铁2号线车辆的调试、预验收、综合联调及演练的整个过程,列举出综合联调及演练期间车辆专业人员的主要任务,如车辆预验收工作的开展、各种检修规程及应急类文本的验证、员工技术技能的提高等.并探讨了综合联调及演练期间车辆专业人员重点工作的推进及注意事项.