基于TCP/IP的嵌入式WebServer网络测控系统设计

本文研究基于TCP/IP协议栈的嵌入式系统在网络智能设备中的测控应用设计。以Rabbit2000网络微处理器和Dynam ic C软件开发环境为例,阐述构建嵌入式W ebServer的具体技术及相关的实现方案;详细介绍了实现TCP、UDP报文进行网络通信、串行口数据通信和对网络智能设备的测控技术等,并给出系统硬件原理框图和有关软件实现的程序代码及流程图。     

Towards a taxonomy-based preferred-customer model for suppliers in air cargo express service markets

Drawing on social exchange and push–pull–mooring theories, this paper develops a taxonomy-based preferred-customer model for B2B air express markets. Our model extends the conventional bilateral customer-supplier relationship perspective of customer portfolio management to include competition effects for more comprehensive (trilateral) strategic decision making. Based on this unified framework, our a survey of 180 customers of air cargo express carriers identifies three distinctive groups of preferred customers. In addition to the effect of competitors on air express carriers’ prioritization of customers, which is further complicated by a satisfaction paradox and spurious loyalty, we further establish classification indicators for differentiating preferred from non-preferred customers. Notably, although commonly used in practice, we find sales volumes to be ineffective for that purpose.     

Intelligent agents for adaptive security market surveillance

Market surveillance systems have increasingly gained in usage for monitoring trading activities in stock markets to maintain market integrity. Existing systems primarily focus on the numerical analysis of market activity data and generally ignore textual information. To fulfil the requirements of information-based surveillance, a multi-agent-based architecture that uses agent intercommunication and incremental learning mechanisms is proposed to provide a flexible and adaptive inspection process. A prototype system is implemented using the techniques of text mining and rule-based reasoning, among others. Based on experiments in the scalping surveillance scenario, the system can identify target information evidence up to 87.50% of the time and automatically identify 70.59% of cases depending on the constraints on the available information sources. The results of this study indicate that the proposed information surveillance system is effective. This study thus contributes to the market surveillance literature and has significant practical implications.     

Air express network design based on express path choices – Chinese case study

Due to the shortage of cargo aircraft, Chinese express companies have to provide transportation services with a hybrid method that consists of “rented bellies and self-owned cargo aircraft”. Because the bellies are rented from air passenger companies and because the cargo aircraft are owned by the express companies, it is important for the express companies to use their cargo aircraft as effectively as possible. This paper constructs a bi-level model to optimize the flight transportation network of an express company. The upper model designs the network and allocates the transportation capacity with the objective of minimizing the total transportation cost, and the lower model calculates the link flows in user equilibrium. Data from ShunFeng (SF) Express Company (China) are used to conduct the case study. Using the model outputs, the flows on links and at nodes are analyzed to illustrate the transportation and transshipment situations.     

中铁快运市场竞争状况研究

中铁快运自从重新组建后,对其业务进行了重组,发展迅速,但同时面对快递业激烈的竞争状况也出现了一系列的问题。本文采用对比分析,数据示例等研究方法,按照提出问题、分析问题、解决问题的研究思路对中铁快运所面对的竞争格局进行探讨并提出建议,希望对中铁快运今后的发展提供帮助。     

高速公路智能交通系统(ITS)组成与应用

本文介绍了智能交通系统的主要研究内容,通过对智能交通系统主要研究内容的分析,总结出ITS在高速公路上的应用。     

10kV开关柜电气故障分析与处理

10 kV开关柜在运行中经常会出现电气故障,造成经济上的严重损失,为了保证设备安全运作,降低故障所造成的损害,要有效地做好开关柜电气故障的检测和预防。文章针对10 kV开关柜出现的电气故障,探讨故障出现的原因并给予了相关的处理策略。     

山水型旅游吸引物"低碳"元素的培植与表述--以福建省九龙谷森林公园为例

在全球气候变暖的危机下,低碳经济是走可持续发展的必由之路,随之低碳旅游应运而生。森林旅游业是低碳经济的一个重要组成部分,在节能减排,降低二氧化碳方面有积极的作用。文章以福建省莆田市九龙谷森林公园为例,对该景区培植低碳旅游吸引物的可能性与必要性进行简要的解析,进而从交通、酒店、餐饮、线路、产品、服务设施等方面对其低碳元素加以培植,在此基础上指出：语言、文字、图片、展演表述是九龙谷森林公园低碳元素表述的最佳手段。     

纳米VO2的制备及在智能控温包装材料中的应用

本文分别采用水热法和溶剂热法制备低维VO2（B）纳米材料,然后在N2（99．999％）氛围中将VO2（B）进行623K热处理,得到VO2（M）蓝黑色粉末。利用X-射线衍射（XRD）、X-射线光电子能谱（XPS）、红外光谱（FTIR）、透射电子显微镜（TEM）和高分辨力透射电子显微镜（HRTEM）等测试样品的成分及形貌特征。结果发现：水热法制得的VO2（B）经热处理后得到VO2（M）纳米带,该纳米带有数微米长,宽100～150nm,厚20～30nm,是典型的纳米带状结构;溶剂热法制得的VO2（B）经热处理后得到花瓣状纳米团簇的VO2（M）,该花瓣状团簇纳米材料由超薄薄片组装而成,长短不均,宽约数10nm。将VO2（M）纳米粉体、高分子分散剂和硅树脂混合制备得到智能控温包装材料（ICT—PM）;通过变温红外测试,发现以水热法和溶剂热法所制备的VO2（M）为基础的包装材料的相变温度为341K,这一结果为VO2（M）在智能控温包装中的应用奠定了基础。     

广播供电系统内高压柜双电源自备投装置的故障处理和分析

随着广播电视工程的扩建升级,高科技广播电视导航设备得到了普及应用。供电系统在供应设备电能使用方面的作用越来越显著。现代广播电视供电系统要求开关柜保持良好的功能状态,设置自检测或自报警功能模块,提前发出系统感应到的异常信号。