A trial application of FSA methodology to the hatchway watertight integrity of bulk carriers

Formal safety assessment (FSA) is a formal, structured and systematic methodology, aimed at enhancing maritime safety, including protection of life, property and marine environment, by using risk and cost–benefit assessments. For the application of this methodology to the rule-making process, the International Maritime Organization (IMO) presented the Interim Guidelines, which describe procedures of FSA and inputs/outputs of each procedure in detail. This paper basically deals with an application of FSA methodology according to the IMO's Interim Guidelines to the hatchway watertight integrity of bulk carriers, which was carried out as a cooperative research between Korean Register of Shipping and Seoul National University. As results of this application study, 18 hazards are identified and 32 risk control measures are devised to reduce the associated risks. Potential risks, costs and benefits when some Risk Control Options are introduced are evaluated in monetary unit of US $. Finally, some discussions and recommendations based on experiences are also given for both future work and better application of this FSA methodology to the rule-making process.     

Multivariable speed synchronisation for a parallel hybrid electric vehicle drivetrain

In this article, a new drivetrain configuration of a parallel hybrid electric vehicle is considered and a novel model-based control design strategy is given. In particular, the control design covers the speed synchronisation task during a restart of the internal combustion engine. The proposed multivariable synchronisation strategy is based on feedforward and decoupled feedback controllers. The performance and the robustness properties of the closed-loop system are illustrated by nonlinear simulation results.     

浅谈工程项目施工过程中的成本控制

工程项目施工过程中的成本控制是施工企业成本控制的关键环节,总结阐述控制工程项目施工成本的5个方面。     

基于MATLAB环境的工业锅炉汽包水位的模糊控制算法

工业锅炉汽包水位的控制是一个大滞后非线性的控制问题，比较复杂。宜采用模糊控制。然 而，模糊矩阵的计算和解模糊都十分烦琐。本文使用面向工程和科学计算的交互式计算机软件MAT- LAB的模糊推理系统工具箱，设计锅炉汽包水位控制系统，用SIMULINK模块对系统进行仿真，实现系 统的优化设计，有效地解决了模糊控制中的难题，大大提高了设计人员的工作效率。     

舰船主柴油机双机并车控制仿真技术的研究

从对舰船主柴油机调速的工作原理分析入手，介绍现在常用的3种舰船主柴油机双机并车运行控制技术的原理和特点，然后，利用现在比较流行的仿真应用软件Matlab，建立主柴油机、调速系统和推进装置的仿真模型，并对功率反馈调速器进行仿真试验研究，阐明计算机仿真技术在舰船主柴油机双机并车控制技术研究中的作用。     

Traffic noise studies in a tropical environment

This paper reports upon a survey of traffic noise annoyance in three residential districts of Trinidad, West Indies. Householder perceptions were solicited by means of a questionnaire survey and direct measurements of traffic noise levels were taken. The results were compared with surveys elsewhere. It was concluded that household status had little effect on annoyance perception, that at L₁₀ levels greater than 70 dB(A) at a dwelling facade the noise level is unacceptable. L₁₀ levels less than 65 dB(A) at the building facade are not perceived as annoying in the environment considered.     

Multi-objective control of a full-car model using linear-matrix-inequalities and fixed-order optimisation

This paper studies multi-objective control of a full-vehicle suspension excited by random road disturbances. The control problem is first formulated as a mixed ?₂/?_∞ synthesis problem and an output-feedback solution is obtained by using linear-matrix-inequalities. Next, the multi-objective control problem is re-formulated as a non-convex and non-smooth optimisation problem with controller order restricted to be less than the vehicle model order. For a range of orders, controllers are synthesised by using the HIFOO toolbox. The efficacy of the presented procedures are demonstrated by several design examples.     

The IMMa optimisation algorithm without control input parameters

The IMMa optimisation algorithm (IOA) consists of a heuristic method based on a differential evolution algorithm for choosing the Magic Formula (MF) tyre model parameters. In a previous paper, we demonstrated that the IOA improved the searching procedure of optimum MF parameters with respect to the starting value optimisation (SVO) methods. But we had to introduce some control input parameters that were fixed during the running process. Now, the new version does not require control input variables to be chosen by the user. That is, we use an algorithm with self-adapting control parameters and it continues being easy to use, robust and fast. Hence, users do not need any kind of knowledge to use the IOA.     

RFID在列车运行控制系统中的应用

介绍RFID技术及工作原理,并将其在列控系统中的应用方式进行描述,最后举例介绍了以RFID构成的点式列控系统.     

基于EPC合同模式的上海对口支援都江堰西区水厂造价控制

该文以上海对口支援都江堰市西区自来水厂为对象,结合EPC合同模式特点,分析和总结了造价控制措施,为援建项目和水厂造价控制积累经验,达到有效地控制造价的目的。