日本铁路桥梁抗震设计中延性率的评价方法

在结构延性抗震设计中,构件以及结构的延性能力计算结果是影响结构抗震性能评价的重要参数。铁路高架桥梁多采用单层或多层刚架,多次超静定结构的破坏形式十分复杂,合理评价它的变形能力是桥梁抗震设计所面临的重要课题。根据作者过去在这一方面的设计经历,介绍了日本现行铁路高架桥设计采用的构件延性率计算方法,以供桥梁抗震设计参考。     

高速公路IP语音调度系统的设计与实现

介绍针对高速公路调度指挥设计的IP语音调度系统，通过IP语音技术解决高速公路调度指挥中通信方面存在的问题。论述系统的设计与结构，并对主要功能的实现原理和实现方法进行了介绍。     

THE OVEREXPRESSION AND SIGNIFICANCE OF CYCLIN D1 AND P53 IN CERVICAL SQUAMOUS CELL CARCINOMAS

Ｄｅｒｅｇｕｌａｔｉｏｎｏｆｃｅｌｌｃｙｃｌｅｃｏｎｔｒｏｌｉｓｎｏｗｃｏｎｓｉｄｅｒｅｄａｋｅｙｅｖｅｎｔｉｎｏｎｃｏｇｅｎｅｓｉｓａｎｄａｌｔｅｒａｔｉｏｎｓｏｆｇｅｎｅｓｉｎｖｏｌｖｅｄｉｎｔｈｉｓｃｏｎｔｒｏｌａｒｅｆｒｅｑｕｅｎｔｆｉｎｄｉｎｇｓｉｎｄｉｆｆｅｒｅｎｔｃａｎｃｅｒｍｏｄｅｌｓ.ＣｙｃｌｉｎＤ1ｈａｓｄｒａｗｎａｔｔｅｎｔｉｏｎａｓａ ｐｏｔｅｎｔｉａｌｏｎｃｏｇｅｎｅｉｎｓｅｖｅｒａｌｃａｎｃｅｒｔｙｐｅｓ .ＣｙｃｌｉｎＤ1ｐａｒｔｉｃｉｐａｔｅｓｉｎｔｈｅｃｏｎｔｒｏｌｏ…     

总段吊装方式多元化的探讨

随着民用船舶和水面舰艇种类的丰富,船体总段吊装方式日趋多元化。文章以三种总段吊装方式为例,对多元化的方式各自的特点、适用范围、优缺点进行分析对比,为各类船舶总段吊装方式的选择提供依据。     

Improved formula for estimating added resistance of ships in engineering applications

The authors previously introduced a semi-empirical formula that enabled fast estimation of the added resistance of ships in head waves, and in this study the formula is further refined for easy use in engineering applications. It includes an alternative ship draft correction coefficient, which better accounts for the wave pressure decay with ship’s draft. In addition, it only uses the speed and main characteristics of the ship and wave environment as input, and has been simplified to the extent that it can be readily processed using a pocket calculator. Extensive validations are conducted for different ship types at low to moderate speeds in various typical irregular sea conditions, and encouraging results are obtained. This relevant and topical research lies within the framework of the recent IMO MEPC.232(65) (2013) EEDI guidelines for estimating the minimum powering of ships in adverse weather conditions, which specify for the use of simple methods in current Level 2 assessment within engineering applications.     

拱轴线的新型式--悬索线

基于大跨径或特大跨径等截面拱桥的恒载分布更接近于沿拱轴均匀分布 ,本文推导了拱轴线的新型式—悬索线的拱轴线方程 ,与其它拱轴线型进行了比较 ,并推导了以悬索线为拱轴线的等截面无铰拱桥恒载内力及影响线计算公式     

Improved Anchored Neighborhood Regression Enhancement for Face Recognition

Although progress in face recognition is encouraging, the accuracy rate of face recognition remains to be increased. Since the face image quality has a positive influence on face recognition accuracy, the image enhancement methods are popular in face recognition. Most current image enhancement methods aim at improving visual appearance, but cannot improve recognition accuracy remarkably. In this paper, a feature evaluation operator is designed to overcome this problem. The operator selects patches with the best quality, and then face image is reconstructed with the selected patches. The proposed algorithm is tested on two different face recognition applications. Accuracy is raised after enhancement, and the result proves that the proposed algorithm is effective.     

辉绿岩作为沥青混凝土上面层集料的应用研究

通过室内试验和现场试验的方式,对辉绿岩作为沥青混凝土上面层集料的应用进行研究,得出了辉绿岩集料的各种物理、力学性质,辉绿岩拌制的沥青混合料的各项指标,试铺路段各种路用指标,证明了辉绿岩作为沥青混凝土上面层集料是完全可行的。最后提出辉绿岩作为沥青混凝土上面层集料应用的施工工艺。     

乙醇燃料HCCI燃烧特性的变参数研究

利用美国Lawrence L ivermore国家实验室公布的乙醇燃烧的复杂化学动力学机理和热力学数据,建立了乙醇HCC I燃烧模型。对模型中复杂化学反应动力学刚性问题采用了能够自动调节步长的Gear向后差分法。分析了进气温度、进气压力、压缩比、当量比等因素对燃烧特性的影响。计算结果对燃用乙醇的HCC I燃烧过程的模拟和分析提供了依据。     

线控转向系统转向盘力回馈控制模型的研究

根据轮胎和传统转向系的力学特性提出了利用车轮转角和车速计算得到转向盘回馈力的思路,并以此建立了线控转向系统转向盘回馈力控制模型,仿真和试验表明该模型能够满足路感要求。