基于施工数据的水下深层水泥搅拌桩成桩质量影响因素分析

随着信息化技术的发展,水下深层水泥搅拌桩(DCM)施工船舶具备了完善的自动化、信息化控制系统,并在施工过程中记录了大量的施工过程数据。绝大部分水泥土影响因素分析基于室内配合比试验数据或实际项目的设计参数及检测结果(即默认施工参数与设计参数保持一致)。但是,实际施工条件与室内条件并不一致,实际施工参数与设计参数也有差异。基于香港三跑水下DCM施工过程中实时记录的施工数据,统计检测桩在施工中的实际参数,结合勘察及土工试验成果,建立勘察-施工-检测的因果关系。通过统计分析影响不同土在不同深度成桩质量的主要因素,为实际施工参数控制提供依据。     

深厚软土上新建大堤对高桩承台结构的影响分析

本文以澳门某堆填区项目为依托,基于深厚软土层,以新建大堤根部高桩承台结构为对象,运用三维有限元软件PLAXIS3D分析新建大堤及后方堆载对高桩承台结构变形及内力的影响,并在此基础上,研究不同土体本构模型、弹性模量及桩基斜度对结构的影响。其结果可为今后类似工程设计提供参考。     

公路波形梁护栏安全性影响因素及评价方法

公路安全生命防护工程不仅是公路设计部门,也是公路养护管理部门重点考虑的内容,主要研究方向是以人民为中心,人性化设计、科学化管养。其中,护栏作为最常用的路侧安全生命防护工程,以经济可靠、防护性能好的优点得到广泛运用并在规范中不断完善。文章通过研究国内外护栏设计现状与近年安全事故数据,分析当今护栏设计中存在的不足,探究影响设计的主要因素,并介绍相关的评价方法。     

The British colonial ‘divide and rule’ concept: its influence to transport access in inner city of George Town,Penang

George Town, Penang, is the oldest British colonial city in South East Asia. The colonial settlement layout in the inner city area is still intact today. The establishment of George Town as a trading centre had attracted immigrants from all over the world, especially from Asia (Chinese, Indians and Arabs). Recently, George Town has been enlisted under the UNESCO World Heritage Lists as an outstanding example of traditional multi-cultural settlement. The uniqueness of this inner city is that the formation of its urban pattern is the result of ‘divide and rule’ concept adopted by the British authority. Under the ‘divide and rule’ concept, these immigrants were located to settlement areas based on their ethnic background under one leader known as ‘kapitan’ (captain). The study finds that transport access in this inner city was influenced by the ‘divide and rule’ concept. Unlike formation of well-planned gridiron pattern in other British colonial cities such as in North America, Canada and Australia, the formation of the urban pattern in George Town has an irregular gridiron pattern. This type of urban pattern is typical under ‘divide and rule’ concept and this had indirectly influenced the setting and planning of the present street access and transport networks.

船舶结构碰撞相似律的数值研究

针对船舶耐撞特性研究问题的特点,提出进行结构碰撞相似律研究的必要性和重要性。利用相似理论分析了碰撞过程的相似参数,建立了船舶结构耐撞性研究中的相似律关系。在此基础上以平板结构撞击特性研究为计算模型,应用显式有限元程序MSC/Dytran对满足比例关系的撞击过程进行数值仿真计算。计算结果表明,原型与比例模型的撞击响应特性符合相似律。考虑到船用材料的率相关性,针对相似加筋圆柱壳结构进行撞击比较分析,认为由于高强度低合金结构钢的率效应不敏感,且撞击载荷速度较低,相似律仍然成立。     

汽车倒车雷达异常报警问题分析及改进措施研究

本文针对某型轿车倒车雷达异常报警问题,通过分析报警原理和相关影响因素,找到问题发生的原因,并提出倒车雷达报警异常的验证方法及改进措施。     

基于MIDAS/GTS的顺层岩质路堑边坡稳定性影响因素及影响规律分析

总结顺层岩质路堑边坡的破坏模式,并利用MIDAS/GTS岩土工程数值分析软件,选取典型的顺层岩质路堑边坡模型进行详细的数值模拟,得出各岩土参数对顺层岩质路堑边坡稳定性的影响规律,具有一定的工程价值。     

合裕线湖区航道尺度的计算分析

根据合裕线航道整治工程中湖区航道特点,分析了影响湖区航道尺度计算的各种因素,提出在设计代表船型（船队）选定后,湖区航道尺度应重点考虑航行漂角、船舶交会时船吸现象、船舶航行下沉量和风浪变化等因素,可为湖区航道整治工程设计提供参考依据。     

公允价值原则在企业会计准则中的应用体现及缺陷

在2006年公布的新会计准则中,我国有选择地采用了公允价值这一计量属性,这符合我国市场经济发展的要求,是与国际惯例接轨的必然。     

Application of Decision Tree Algorithm in Stamping Process

Introduction Learning is the main symbol of human intelli-gence and the basic means to acquire the knowl-edge. Machine learning can extract the rules hid-den in data through analyzing the relations amongobjects, which is also computational theory to in-vestigate learning. Nowadays, various methodsare adopted in machine learning field, such as deci-sion tree, Bayesian classification, neural network,genetic algorithm and rough set[1]. Many machinelearning methods have been used as the convenien…