舰船航姿发送系统的数字化改进设计

随着现代惯性导航设备（特别是捷联导航设备）的发展,惯性测量单元（IMU）大多以数字平台的方式存在,发送数字信号简单而方便;为兼容一些设备的模拟电机接收,对原有的舰船航姿发送系统进行数字化改进就显得十分必要了。该文提出了某舰船航姿发送系统的数字化改进设计的原理、方案和实现的一些关键措施,并列举了该系统的特点和与原系统的优势所在。     

靠船件安装方法的设计和计算

新建导管架海上安装通常需要动用大型浮吊船舶,成本高昂,靠船件原有的安装方法就位困难,甚至可能延误工期,浪费施工资源。对此,结合工程实例,介绍了一种新的靠船件安装方法,阐述了其使用的导向型钢的结构形式和安装位置,并使用ANSYS软件进行了强度校核,最后对其在实际工程应用中提出了几项建议。     

5000t级半潜驳出运超大型沉箱技术

通过对"半潜驳7号"拟出运6000t/7000t沉箱所存在的技术问题进行分析研究,寻求解决方法并制定最佳船舶改造方案。结果表明,"半潜驳7号"经简易改造可以满足6000t/7000t沉箱的出运需要。     

Investigating UAVs applications and intention to use in the maritime shipping in Taiwan

ABSTRACT

This study empirically evaluated the effects of unmanned aerial vehicles (UAVs) applications and acceptable cost on intention to use UAVs in maritime shipping contexts. Factor analysis was employed to identify key UAVs applications (i.e. pollution forensics, supervision and service, search and rescue, humanitarian and emergency delivery, and safety and security), acceptable UAV cost, and intention to use UAVs. Survey data were collected from 201 respondents working for a maritime port corporation, shipping company, agency, and stevedoring company, and then hierarchical regression analysis was conducted to test research hypotheses and examine the effects of UAVs applications and acceptable cost dimensions on intention to use UAVs. The results suggested that the pollution forensics, supervision and service, search and rescue, humanitarian and emergency delivery, and safety and security dimensions positively affected intention to use UAVs. The study findings also revealed negative associations among seniority, turnover, and intention to use UAVs. Theoretical contributions and managerial implications are proposed to assist maritime port bureaus, corporations, and operating practice design in remaining competitive and efficient.     

86m挤密式砂桩船的研发设计

挤密式砂桩船和传统打桩船是迥然不同的,就86m挤密式砂桩船的研发设计进行了论述,主要涉及小尺度下的总布置与稳性、结构设计、植砂桩系统、轮机、电气设计特点及监控诸方面,以供深入研究这一船型作参考。     

海军91043部队输油管线腐蚀分析与阴极保护

通过对海军91043部队输油管线沿线土壤腐蚀性和管线腐蚀状况的分析,设计了牺牲阳极的阴极保护方法。保护电位测试结果表明:输油管线阴极保护后,阴极电位分布均匀,阳极保持较负的工作电位,使管线处于良好的保护状态,抑制了土壤腐蚀。     

Experimental study on cyclosporine A drug delivery system in prevention of posterior capsule opacification after intraocular lens implantation in rabbits

Objective To study the effect of cyclosporine A drug delivery system (CsA-DDS) on the prevention of posterior capsule opacification (PCO) after experimental intraocular lens implantation in rabbit eyes. Methods Twenty healthy New Zealand white rabbits, whose left eyes and right eyes were used respectively as experiment eyes and controls, were subjected to extracapsular lens extraction and artificial lens implantation. During the operation, CsA-DDS with poly (lactideco-glycolide) as carriers or empty DDS was implanted in the capsular bag for the experimental eyes and controls respectively. After the operation, anterior chamber reaction, intraocular pressure (IOP) and CsA concentration were monitored and twelve weeks after the operation, the eyes were extracted for histopathological and morphological examinations. Results There were no differences between the two groups in conjunctival congestion,IOP change and anterior chamber reaction. PCO was less severe in the experimental eyes than in the controls. Light microscopy revealed that posterior capsular membrane in the experimental eyes was slick, with no obvious proliferation,whereas in the controls, there were lens epithelial cell proliferation and cortex regeneration of different degrees.Morphological examination with electron microscope showed that in the experimental eyes, lens epithelial cells did not function actively and apoptosis occurred, whereas in the controls, epithelial cells presented active function. No marked ultrastructural changes were found in either group. Conclusion Cs-DDS can inhibit PCO after intraocular lens implantation in rabbit eyes and does not have toxic effects on the surrounding ocular tissues. Therefore, it has a good potential for clinical use in prevention of PCO.     

箱形驳船底部砰击载荷及结构加强要求研究

针对箱形驳船,建立了三维水动力计算模型,对箱形驳船系列在设计海况下的船体与波浪之间的相对运动和相对速度做了短期预报。运用Ochi船舶砰击理论,分析了箱形驳船在不同吃水和拖航速度时船首砰击的发生概率和砰击压力极值等,并讨论了吃水、拖航速度等因素对箱形驳船底部砰击特性的影响。在此基础上,提出了箱形驳船首部砰击加强的临界航速建议,为箱形驳船规范中有关底部砰击载荷的修订提供参考和依据。     

平板驳船与汽车吊组合用于跨江大桥钢管拱吊装

该文介绍了跨浦阳江大桥三跨（55m＋62．8m＋55m）下承式钢管预应力混凝土简支系杆拱桥,用平板驳船与汽车吊组合,替代钢缆索吊或水上大型吊装船吊装钢管拱,并介绍了船车组合、稳定设计、拱管吊装所采取的技术措施。     

T型导管架下水驳船设计建造过程中的控制要点

在海洋油气的开发中,下水驳船承担着大型结构物(如导管架、组块等)的装载、运输、下水和安装等角色,尤其是超大型导管架(例如荔湾3-1项目32 000 t导管架)的滑移下水,更是下水驳船所独有的功能。该文重点从导管架下水设计的角度出发,以18 000 t T型导管架下水驳船为例,介绍了在设计和建造此类下水驳船中,需要控制的一些技术要点,从而为今后同类船舶的设计建造提供借鉴。