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船周期背景下船舶企业投资价值研究
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作者 饶大文 《中小企业管理与科技》 2023年第13期145-147,共3页
随着全球贸易的发展和经济的增长,船舶行业扮演着举足轻重的角色。然而,船舶市场存在周期性波动,即船周期。船周期对船舶企业的投资价值具有深远影响,因此,研究船周期对船舶企业投资价值的影响及相应的管理策略变得至关重要。论文通过... 随着全球贸易的发展和经济的增长,船舶行业扮演着举足轻重的角色。然而,船舶市场存在周期性波动,即船周期。船周期对船舶企业的投资价值具有深远影响,因此,研究船周期对船舶企业投资价值的影响及相应的管理策略变得至关重要。论文通过分析船周期的影响因素和其对船舶市场的影响,深入探讨船周期对船舶企业投资价值的影响机制。特别关注船周期与投资回报率、投资风险、资本结构和财务绩效之间的关系。 展开更多
关键词 周期 舶企业 投资价值
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变形Boussinesq方程组的周期波解和孤立波解 被引量:2
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作者 李保安 李修勇 +1 位作者 李晓燕 王明亮 《河南科技大学学报(自然科学版)》 CAS 2004年第2期91-94,共4页
变形Boussinesq方程组是描述水波双向传播的数学模型。根据齐次平衡原则并利用F -展开法求出了该方程组丰富的用Jacobi椭圆函数表示的双周期波解。在极限情形下 ,得到了该方程组的孤立波解和单周期波解。
关键词 变形Boussinesq方程组 周期波解 孤立波解 水波 椭圆函数 周期船 F-展开法 齐次平衡原则
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航天测量船船摇数据特性分析 被引量:17
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作者 李晓勇 张忠华 +1 位作者 张同双 康德勇 《中国惯性技术学报》 EI CSCD 2006年第3期27-30,41,共5页
简要介绍了远望号航天测量船船摇数据,分析了船摇数据对船载外测数据的影响,重点对船摇数据的一些基本规律和特性进行了初步分析。
关键词 海上测量 摇数据 特性分析 周期
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航天测量船液位采集系统的设计与实现
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作者 黄玉学 王勤 《武汉大学学报(理学版)》 CAS CSCD 北大核心 2007年第3期342-346,共5页
针对航天测量船液舱分布散、数量多、工作环境恶劣、液位测量精度低等现状,采用数据采集、模数变换、单片机及计算机等技术,设计了一套船载多种功能液位数据实时采集监测系统.该系统突破了传统的夜位数据采集方法,实现了单一液位变送器... 针对航天测量船液舱分布散、数量多、工作环境恶劣、液位测量精度低等现状,采用数据采集、模数变换、单片机及计算机等技术,设计了一套船载多种功能液位数据实时采集监测系统.该系统突破了传统的夜位数据采集方法,实现了单一液位变送器的准确安装定位、数据处理与船摇周期有机结合,有效地解决了需多个液位变送器才能准确测量液位数据的难题.通过实际工程应用显示:该系统具有测量精度高(毫米级)、低噪声、数据准确、可移植性强、以及对液位综合信息的随机查询、存储、报表生成与管理的特点,可实现较高的经济和社会效益. 展开更多
关键词 AT89C51 TLC2543 数据采集 串口通讯 周期
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A Model of Application System for Man-Machine-Environment System Engineering in Vessels Based on IDEF0 被引量:5
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作者 ZhenShang Changhua Qiu Shifan Zhu 《Journal of Marine Science and Application》 2011年第3期347-357,共11页
Applying man-machine-environment system engineering(MMESE)in vessels is a method to improve the effectiveness of the interaction between equipment, environment, and humans for the purpose of advancing operating effici... Applying man-machine-environment system engineering(MMESE)in vessels is a method to improve the effectiveness of the interaction between equipment, environment, and humans for the purpose of advancing operating efficiency, performance, safety, and habitability of a vessel and its subsystems. In the following research, the life cycle of vessels was divided into 9 phases, and 15 research subjects were also identified from among these phases. The 15 subjects were systemized, and then the man-machine-environment engineering system application model for vessels was developed using the ICAM definition method 0 (IDEF0), which is a systematical modeling method. This system model bridges the gap between the data and information flow of every two associated subjects with the major basic research methods and approaches included, which brings the formerly relatively independent subjects together as a whole. The application of this systematic model should facilitate the application of man-machine-environment system engineering in vessels, especially at the conceptual and embodiment design phases. The managers and designers can deal with detailed tasks quickly and efficiently while reducing repetitive work. 展开更多
关键词 man-machine-environment system engineering (MMESE) ICA^M definition method 0 (IEDFO) VESSEL life cycle
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The Application of a Smartphone in Ship Stability Experiment
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作者 Mohamed Abdelkader Djebli Benameur Hamoudi Omar Imine Lahouari Adjlout 《Journal of Marine Science and Application》 CSCD 2015年第4期406-412,共7页
The inclining experiment is the only regulatory tool to assess ship stability. This experiment is a time consuming process for both real-life tests and ship model experiments. The difficulty is mainly due to a bias in... The inclining experiment is the only regulatory tool to assess ship stability. This experiment is a time consuming process for both real-life tests and ship model experiments. The difficulty is mainly due to a bias in the measurement of heel angle. Nowadays, digital inclinometers are available, but they are expensive. In this study, the use of a smartphone application is presented for ship inclination and rolling-period tests. The idea consists of using accelerometer and gyroscope sensors built into the current smartphones for the measurements. Therefore, some experiments are carried out on an example trawler model to exhibit the uses and advantages of this method. The obtained results are in good agreement with those provided from the pendulum method and natural roll-period test. This application is new, easy, and more accurately assesses metacentric height during the inclining and rolling-period tests. 展开更多
关键词 ship stability GM-Meter inclining experiment rolling-period test SMARTPHONE ACCELEROMETER gyroscopic sensor
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