单片机仿真开发软件的应用

单片机技术是现代电子工程领域一门迅速发展的技术,在嵌入式系统开发中起着关键的作用。本文介绍了三种最常用的单片机设计仿真软件WAVE 6000、KEIL C51和Proteus软件,比较了其功能特点,并结合Proteus软件的应用实例,给出了仿真的具体步骤及C51源程序。     

基于ACE的嵌入式网络传输客户端设计及应用

介绍了一个51单片机串行通信应用实例,作为实现点对点数据传输的方法,并给出了实现电路和发送程序.     

应用单片机实现点对点数据通信

介绍了一个51单片机串行通信应用实例,作为实现点对点数据传输的方法,并给出了实现电路和发送程序.     

基于SL811HS的嵌入式USB主机的设计

介绍了CYPRESS公司生产的主/从双工作模式USB接口芯片SL811HS的性能与内部结构,给出了SL811HS芯片与51系列单片机的接口电路,同时给出了该系统的USB驱动程序及实现U盘读写功能的应用程序.     

单片机应用程序加密方法的探讨

本文通过对ＭＣＳ－５１系列单片机系统程序特点的分析，结合实例，提出了一些利用硬件和软件技术加密应用程序的方法 。     

计算机在船舶结构和静水力计算中的应用

用VB语言编制与船舶设计相关和与船舶原理教学相关的一些应用程序.主要为船舶结构和静水力计算两部分的应用程序.该程序可广泛应用在船舶设计、船舶倾斜试验以及船舶原理课程的教学中.文中提供了程序的使用方法和程序的源代码,具有一定的推广应用价值.     

分布式桥梁远程监测系统的研究

桥梁远程监测是利用有线或无线通信方式实现桥梁状态实时远程监测的方法,它改变了传统的以人工为主的监测手段,大大提高了桥梁监测的自动化程度。本设计中采用Internet网络来实现桥梁状态的远程监测,系统硬件主要是基于RS-485总线和单片机组成的分布式多路数据采集系统,软件部分使用单片机C语言设计了单片机工作程序,使用Visual Basic语言完成了系统中客户端、服务器端应用程序设计。     

MCS-51单片机实验板系统设计

提出了MCS51单片机的数据与程序存贮器统一编址的方法,并为实现这种方法进行了硬件和软件的设计。     

单片机船舶主轴扭矩检测系统

采用电子测量方法进行船舶主轴扭矩检测,构建船舶主轴扭矩检测系统,提高船舶主轴扭矩检测性能,提出基于单片机的船舶主轴扭矩检测系统设计方案。系统采用C51单片机进行控制核心模块开发,检测系统的硬件模块包括数据采集模块、主轴扭矩电子测量模块、信息处理模块和数据输出模块等,在嵌入式ARM中进行检测系统的程序加载控制,采用C51单片机进行船舶主轴扭矩检测中的嵌入式信息处理和人机接口通信,完成检测系统的硬件集成开发设计。测试结果表明,该系统能准确实现船舶主轴扭矩检测,检测的准确性较高,系统稳定性较好。     

微控制器的多串口扩展设计

很多单片机应用系统常需用到多个串口,但常用的51单片机只有一个串口,常常不能满足需要。本文针对微控制器的特点,介绍了3种通用异步串口扩展方案,给出了硬件原理图和部分程序,详细介绍了实现原理和使用方法,并对3种方案的稳定性、经济成本、扩展数量及扩展方式、接口电路及通信协议的复杂程度等方面进行了详细的比较和分析,用户可根据实际情况进行选择。     

Discourse of maritime forms (Check lists)

Check lists represent a very important tool within the International Safety Management Code, aimed at the regular and thorough assessment of the safety on board ships along with the operation of their parent companies. There seems to be only a few academic articles studying the communicative and rhetorical aspects of these maritime forms explaining why they are written in the way they are, especially in the light of their users who constitute a specific discourse community. The structure of a sample of representative lists is presented, as these check lists do not differ from the forms used by other European shipping companies. After interviews with the seafarers (deck and engine officers) to whom the check lists were administered, the conclusion was reached that they prefer short and unambiguous forms. In addition, a correlation about the language competence of the crew members on board ship was found: the simpler the discourse of the check list, the lower the responsibility of the crew member on board. Further, investigation into these complex language patterns focuses on the practical benefits.     

Change in list of a ship due to vertical shifting of a weight

When a ship gets an original list, and a weight is to be vertically shifted (or is to be suspended by a ship’s gear), two approaches for calculating the change in list of the ship have been developed as follows: the first one—for the case when the biggest list of a ship is not more than 5–6°, and the second one—when the biggest list of a ship is not more than 10–12°. These equations have been represented in dimensionless form and reviewed for different specific shapes of a ship’s sides: circle, tumblehome, and wall-sided ones. For wall-sided ships, in order to simplify the procedure of calculating the change in list, a graphical approach and corresponding nomogram has been proposed and designed. The developed method and equations can be also used for calculating the change in list of a ship when heavy-lift cargo is just suspended by the ship’s own gear during heavy-lift operations.     

Windchill系统中外来技术文件的批量导入方法研究

设计所、船厂作为船舶的设计和制造部门,经常要从合作部门,或者是上游部门接收大量的技术设计结果。为了将这些外来技术文件快速提交入库,本文基于PDM软件Windchill开发了批量导入方法。该方法以常用的Excel表格作为文件导入的载体,在Windchill系统用户界面开发添加下拉菜单操作项,链接JSP文件导入页面,并通过...     

Environmental risk assessment of the most commonly transported chemicals: case study of Finnish coastal areas

The environmental hazard potential of a total of 15 chemicals that are transported through the Finnish coastal areas was assessed in this paper using a scoring method developed for accidents. The study indicates that the chemicals most commonly transported/handled in Finnish ports are methanol, sodium hydroxide solution, acids, pentanes, phenol, xylenes, methyl tert-butyl ether, ethanol and ethanol solutions. For the evaluation of the environmental hazardousness of various chemicals, a priority list of chemicals that are the most commonly transported regionally in marine environments was compiled for this study. The method used has many similarities to other commonly used scoring systems, but this study gave more weight to specific characteristics of an accidental release, water biota and impact on the environment. Nonylphenol, ammonia and sulphuric acid ranked as the most hazardous substances on the list. The results of the study can be used by rescue and environmental authorities and enterprises to improve preparedness for accidents and to mitigate the effects of accidental spills.     

Liner alliances in the globalization era: a strategic tool for Asian container carriers

There has been an increased interest recently in alliances as successors of the large consortia that used to operate in the context of the conference system. Today, having become a common means and term of co-operation in a variety of other industries, alliances are posited as the response of the supply side of liner shipping to important changes on the demand side; alliances have, thus, become predominant in the most important routes for container cargoes. In recent years, however, the list of major container traffic generators and the list of major carriers of containerized cargoes have begun to contain more common entries, generally originating from the Asian region. Asia is, however, a large continent and the entrance of Asian carriers into liner shipping has not been simultaneous; the position, strategies and co-operation strategies of Asian companies have more differences than they share common features. Nevertheless, this paper suggests that alliances are a distinct form of co-operation in liner shipping and the empirical evidence based on a survey in the region supports this hypothesis. The similarity of attitudes of the major Asian container carriers vis a vis alliances is in this way revealing in terms of the range of motivations for participating in the alliance system in a globalized transport environment.     

A conceptual framework for cooperation in hinterland development between neighbouring seaport authorities

The hinterland of a port is probably the most important aspect in the competition between gateway ports. This paper, starting with a literature overview, shows how the port authority can extend its hinterland with the aim of increasing its attractiveness and, eventually, its throughput. To achieve this, it can be advantageous to cooperate with adjacent port authorities. Together, through cooperation, economies of scale can be realised that facilitate a modal shift away from road to a more efficient and more sustainable transport. This would reduce the cost of transport to/from the hinterland region from/to these ports consequently increasing the attractiveness and the market share of the cooperating ports for this region. The paper describes a conceptual method to identify and quantify the opportunities for cooperation in the hinterland. The framework starts, after some basic transport economic concepts, from (theoretically available) hinterland data to locate regions that are at the edge of the contested hinterland of a port region and results in a methodology that can be used to generate a quantified list of regions where cooperation will make a difference. Using this methodology, port authorities (PAs), of any region where hinterland data are available, can list, together with their neighbours, the regions where to prioritise their efforts.     

浅谈船舶造修企业安全生产管理的一点体会

船舶造修企业生产经营活动的特点是:国家相关部门严格监管的"特种设备作业人员作业种类与项目"多。因这类作业潜在的风险会造成诸如"火灾、爆炸、灼烫、坠落、挤压、触电、坍塌、淹溺、中毒、窒息等导致人身伤害和财产损害的生产安全事故"。因此,要搞好船舶造修企业的生产安全,就必须坚持国家"安全第一、预防为主、综合治理"的安全生产方针。     

大型港机设备钢结构件的监造

结合港机钢结构件的制造工艺，较为详细地列出了港机钢结构件制造过程中的监造检验要点，并介绍了监造工作方法。     

基于C/S模式的职称评审系统的研究

遵循海军专业技术职务评审工作的要求，对实现海军专业技术职务评审辅助系统中的一些关键技术进行了研究，然后列出了一些实际开发中所遇到的问题并给出了解决方案。     

船员工作休息时间规定及其港口国检查应对

文中在归纳总结IMO和ILO公约、我国法规有关船员工作休息时间规定的基础上,列举了港口国检查常见缺陷,并就如何避免在港口国检查中出现这些缺陷,提出了针对性措施。