Mixed analysis of shell and solid elements using the overlaying mesh method

 This article presents a mixed method of analyzing shell elements and solid elements using the overlaying mesh method. In the structural design of a ship's hull, the shell elements are used for the global model. However, the solid elements are necessary to analyze the stress concentration zones or the vicinity of a crack. In such cases, the models are analyzed using zooming analysis, in which the results of a global model analysis are transferred to a local model analysis by imposing boundary conditions. This method is more advantageous than zooming analysis in terms of the accuracy of the solution and the modeling flexibility. Some examples of a plate model with a cracked surface or with a projection are shown in order to demonstrate the effectiveness of the method. Received: August 6, 2002 / Accepted: November 25, 2002 Address correspondence to: S. Nakasumi (sumi@nasl.t.u-tokyo.ac.jp) Updated from the Japanese original, which won the 2002 SNAJ prize (J Soc Nav Archit Jpn 2001;189:219–224; and 190:655–662)     

APPLICATION OF HMB－45 MONOCLONAL ANTIBODY AND S100 PROTEIN IN THE IMMUNOHISTOCHEMICAL DIAGNOSIS OF MELANOMA

ＡＰＰＬＩＣＡＴＩＯＮＯＦＨＭＢ－４５ＭＯＮＯＣＬＯＮＡＬＡＮＴＩＢＯＤＹＡＮＤＳ１００ＰＲＯＴＥＩＮＩＮＴＨＥＩＭＭＵＮＯＨＩＳＴＯＣＨＥＭＩＣＡＬＤＩＡＧＮＯＳＩＳＯＦＭＥＬＡＮＯＭＡＬｉｕＤａｎｙａ（刘丹亚）；ＳｕＢａｏｓｈａｎ（苏宝山）；Ｘｕ...     

Maritime accident investigation and temporal determinants of maritime accidents: A case study

This paper presents the results of an investigation into temporal determinants of maritime accidents based on a data-set obtained from the proceedings of formal inquiries in the former German Democratic Republic (GDR). The results show that there is no statistically significant outcome between the probability for an accident and the time of watch. Thus the results do not confirm previous studies, which reported significant time of day effects.The outcome of this study indicates that marine inquiries can provide useful data for an analysis of underlying causes of maritime accidents. It is suggested that accident inquiries should be extended into the area of watch systems employed and should record the hours of work and of rest of the officers on the watch involved in a maritime accident.     

The role of professional associations in shipping

This article is in three parts. The first covers the historical development of qualifying associations. The second covers the particular role of maritime institutions that include The Royal Institution of Naval Architects, The Institute of Marine Engineering Science and Technology and The Nautical Institute. The third and final section considers the future for maritime professional associations in the context of international shipping.     

借鉴欧美港口经验探讨我国港口联盟的实现

针对目前各国港口间过度竞争的情况,说明了港口之间建立联盟的必要性.在借鉴欧美港口合作经验的基础上,对我国的港口联盟进行了探讨,特别分析了不同区域的港口群在构建战略联盟时所应注意的方面.最后指出了未来研究的方向.     

劲性混凝土柱施工技术难点及质量控制

结合工程实例,对劲性型钢混凝土柱在施工过程中存在的技术难点和采取的相应技术措施,以及施工中的质量控制进行了阐述,可为类似工程提供借鉴.     

钢-混凝土双面组合箱梁日照温度效应研究

在自然环境下,钢一混凝土双面组合箱梁受一天中日照变化的影响,在梁体内部会产生相应的温度应力和变形。以三跨钢一混凝土双面组合箱梁为研究对象,对组合梁在6：00至18：00日照条件下的温度应力与位移进行计算分析。利用有限元软件ANSYSl0．0建立三跨连续组合箱梁有限元模型,采用间接耦合解法进行热一结构耦合场的运算。得到了温度应力与温度位移的分布规律及时程分析,并对箱梁混凝土底板对温度效应的影响进行探讨。     

Lattice-based group signature with verifier-local revocation

Among several post quantum primitives proposed in the past few decades, lattice-based cryptography is considered as the most promising one, due to its underlying rich combinatorial structure, and the worst-case to average-case reductions. The first lattice-based group signature scheme with verifier-local revocation(VLR) is treated as the first quantum-resistant scheme supported member revocation, and was put forward by Langlois et al. This VLR group signature(VLR-GS) has group public key size of O(nm log N log q), and a signature size of O(tm log N log q log β). Nguyen et al. constructed a simple efficient group signature from lattice, with significant advantages in bit-size of both the group public key and the signature. Based on their work, we present a VLR-GS scheme with group public key size of O(nm log q) and signature size of O(tm log q). Our group signature has notable advantages: support of membership revocation, and short in both the public key size and the signature size.     

汽车车轮侧滑量检测存在问题及对策研究

在分析侧滑产生机理的基础上，论述了目前侧滑检测中存在的检测结果离散性大、判定失准等问题。指出产生这些问题的原因除车速、载荷、胎压等因素外，还包括侧滑台的技术状况、检测站的设计形式等因素。针对问题提出了稳定检测条件、合理制定标准、提高检测技术等实现侧滑量准确检测与正确评定的有效措施。     

车用柴油机电控开发系统的软,硬件设计及应用

本文研制了一种新的发动机电 控燃油系统的开发系统的微机测控系统。