SQL server查询优化分析

随着应用系统中数据量的增大,提高数据库管理系统SQL server的查询和访问数据功能极为必要。本文就提高SQL server的查询优化问题进行一些分析。     

浅谈我省检测机构的内部质量控制

针对目前我省检测市场及检测机构存在的问题和不足进行了分析,对如何加强内部质量控制提出了自已的看法,为检测行业健康有序发展提供了有益的借鉴.     

A lane-change trajectory model from drivers’ vision view

Car-following and Lane-changing are two fundamental tasks during driving. While many car-following models can be applied, relatively, only a few lane-changing models have been developed. Classical lane-changing models mainly focus on drivers’ lane selection and gap acceptance behaviors, but very limited research has paid attention to formulating detailed lane-changing trajectories. This research aims to fill the gap by proposing a lane-changing trajectory model, which is built directly from drivers’ vision view, to model detailed lane-changing trajectories. A large amount of data of reference angles, defined as the angle changes between the drivers’ vision angle and left or right lane line, were first extracted from the videos recorded by the vehicle traveling data recorders (VTDRs) installed in 11 taxies. A comprehensive data analysis indicates that same drivers show similarity of their daily lane-changing habit but with variety, and different drivers’ lane-change trajectory data show different lane-change “personality” including aggressive or non-aggressive behaviors. Based on these findings, this paper then proposed a hyperbolic tangent lane-change trajectory model to describe drivers’ detailed lane-change trajectories. The model is verified using both real data and simulation. The results show the proposed lane-change trajectory model can successfully describe drivers’ lane-changing trajectories. More importantly, some parameters in the model are directly associated to drivers’ driving characteristics during lane-change. With this unique feature, the proposed model can generate driver-specific lane-change trajectories. Such improvement could contribute to the future development of Advanced Driver Assistance Systems (ADAS).     

低地板有轨电车的视频后视系统

低地板有轨电车的视频后视系统主要由2个后视镜控制器、4个后视镜模拟摄像头和4个控制显示器等组成.4个后视摄像头代替了常规4个后视镜,这样可以确保有效地监视车辆侧面和所有车门状态.该后视系统提升了低地板有轨电车的安全性能和信息化程度.     

Oracle安全策略在国际联运管理系统中的应用

随着网络的发展,信息安全有着越来越高的重要性.阐述了基于国际联运管理系统的Oracle数据库系统安全机制在信息管理系统中的应用.     

中西方早期“和谐”伦理思想比较

本文从中西早期伦理思想史出发,就中西＂和谐＂思想在本源、内容和特点的异同进行了梳理与比较,并且阐述了＂和谐＂思想在价值观诸方面的现代价值。     

On a clear day in Ogunquit,Maine

Abstract

Winning a court case against a federal agency may seem to be the sweetest success for an environmental group, but losing litigation is not total failure. In the case of Ogunquit Village Corporation et al., vs. R. M. Davis the plaintiff lost the legal skirmish against the Soil Conservation Service, but in doing so significantly aided the struggle within the agency to implement more environmentally sensitive planning and engineering procedures. This paper describes the court case in terms of the Soil Conservation Service's procedural and policy responses including the agency's modus operandi and the internal paths/pitfalls involved with the implementation of visual resource management. The author also speculates as to the visual resource understanding of the evidence presented by the plaintiff and a possible but unstated visual basis for the original complaint.     

Managing culturally diverse maritime human resources as a shipping company’s core competency

ABSTRACT

The last few years a great body of research focused on the problems observed in the shipping industry due to the mix of different nationalities on board. Herein, the problem is observed in the managerial level, and specifically to the applied crew management strategies and the philosophy of the shipping companies regarding the issue of multiculturalism. The present paper seeks to elevate the value of human resources in shipping and to underline the potentials that human resource management and cultural diversity management have as a shipping company’s core competency. In a triangulated theoretical framework, the combination of resource-based view, human resource management, and cultural diversity management leads to a framework of choices which include strategies for the management of maritime human resources’ cultural diversity. The paper analyses the practical application of the proposed strategies and the fulfilment of the criteria required for turning crew management to a core competency and gaining sustainable competitive advantage from human resources.     

杭州市电厂热水河(电厂河-上塘河)综合整治工程设计

该文以杭州市电厂热水河综合整治工程为例,论述了河道景观设计意在通过挖掘和发展河道自身特有的生态价值、文化价值、美学价值和游憩价值,向包括生态维护、景观游憩、人文展示在内的复合式廊道功能转换。从而加强河道与城市主流空间的融合,使杭州重归江南水乡的风貌,真正体现生活品质之城的风采。     

基于虚拟现实的船舶操纵系统视景多通道同步技术

在介绍船舶操纵训练系统视景的体系结构基础上,提出视景多通道同步的要求及其技术实现,采用多线程的结构以及推算定位等技术实现多通道同步,使通道帧数差在2帧以内,各通道的产生的画面就感觉是同一时刻、同一视点产生的。