Abstract:It is investigated whether random simulated wind field can reflect the random characteristics of the given wind environment on the basis of wind field simulation algorithm of random Fourier spectrum. This investigation is based on a comparative study of the mean spectrum and the standard spectrum of the random Fourier amplitude spectrum and the random coherence function between the simulated wind field and the objective wind field. A case study shows that the proposed random wind field simulation algorithm can reflect accurately the random characteristics of the given wind field.

Abstract:为比较分离双箱涡振性能在高低雷诺数试验中的异同,在同济大学TJ-1和TJ-3风洞试验室进行了40个工况的对比试验.结果表明,在低雷诺数试验中涡振出现的阻尼比区间及其相应的振幅都较大,在高雷诺数试验中涡振出现的阻尼比区间和幅值都较小;导流板在零度攻角时无论雷诺数高低都能减小涡振振幅,但在攻角存在时,导流板仅在低雷诺数试验条件下能够增大涡振振幅而在高雷诺数试验条件下则会减小涡振振幅.最后还对试验现象差异的机制进行了分析,并对与大带东桥和昂船洲桥研究结果异同的原因进行了分析.

Abstract:深圳罗湖商务大厦结构由密柱框架-筒体结构体系改为稀柱框架-筒体结构体系.为比较结构的抗震性能,对设计修改前后的结构进行了整体模型模拟地震振动台试验.首先介绍了振动台试验的过程及现象并分析了结构的破坏模式,然后对比分析了结构的动力特性和加速度及位移反应.研究表明在7度罕遇烈度地震动作用下,在等效刚度下降幅度、结构主体部分(钢筋混凝土部分)最大加速度反应、结构顶点位移反应等方面,设计修改后的结构均小于设计修改前的结构.

Abstract:An analytic study of stress and displacement during dynamic construction is conducted on the immerged underground tunnel. The coupling influence of viscous aging and construction on the displacement is considered during derivation. Rock mass is simulated to Maxwell viscoelastic model, and basic equations of this problem are presented then. Analytic displacement solution of infinite homogeneous plane with one circular tunnel under uniform ground stress is derived by solving basic equations directly. Solutions of stresses are obtained by correspondence principle method. Stress and displacement solutions available for the analysis of circular tunnel with radius random time varying. Then viscoelastic solution is obtained for the time after construction with radius linear and non-linear time-varying, For different construction path with the same ultimate shape, influence of construction speed and acceleration is analyzed quantitatively, and the phenomenon of time-radius correlation is also studied.

Abstract:采用分析控制方程法推导了承压水基坑渗流-应力耦合场离心试验的相似规律,得到离心试验的相似指标和相似系数;针对上海地铁M8线黄兴路车站深基坑,对承压水基坑变形稳定进行了离心试验;最后,将基坑变形的试验结果与现场实测结果进行了比较.结果表明:离心试验与现场实测的基坑变形规律基本一致,基坑变形值两者最大相差在50%以内;采用离心模型试验可有效地模拟承压水基坑降压开挖施工中地面和围护结构的位移响应,可为承压水基坑设计施工提供可靠的依据.

Abstract:在中国进入汽车城市的背景下,因盲目发展交通,使部分城市的历史环境产生不可逆转的破坏.在旧城道路改造中应考虑城市历史环境的保护和延续,正确对待旧城区的道路建设,遵循适合的保护原则与方法,采用现代的技术和管理等手段,构筑历史与现代的共生空间.

Abstract:Element model of pavement performance extension assessment is established on the basis of extenics theory. Based on extension set theory and dependent function, correlative degree of assessment of pavement performance can be accurately calculated with this model;and the state of pavement performance can be estimated, which provides a scientific and credible guide line to road maintenance.

Abstract:针对我国现有道路交通条件下典型的信号控制交叉口,对不同车道宽度、转弯半径的右转车道的饱和车头时距进行现场测定.在确定和排除了数据中的异常值后进行数据分布分析,结果表明右转车道饱和车头时距服从对数正态分布或正态分布.考虑右转车道宽度、转弯半径的影响,给出了右转车道饱和流量的回归计算模型.比较结果表明,所给计算模型比美国HCM2000(Hghway Capacity Manual 2000)更符合国内的实际情况.

Abstract:No-Wardrop-equilibrium theory is introduced into this paper. An analysis is made of the road-net systemic welfare when the fixed user and elastic user are coexisting in congestion-pricing. Result shows that the elastic user is an efficient colony on an inferior position while the fixed user is an inefficient one but on a preponderant position. The paper illustrates the negative effect of enterprisevehicle on implementing congestion pricing strategy with a theoretic analysis and an example, controlling of the numbers of enterprise-vehicle or changing enterprise-vehicle choice rule on the basis Of the Wardrop-equilibrium theory will be helpful to the road-net systemic welfare.

Abstract:Based on numerous research works on road traffic safety, the difference between the designed speed and the operating speed and the operating speed difference between successive road segments were chosen as the evaluation indexes. Some tests were carried out to obtain the best adaptation of the fuzzy judgment to the expected accident late to define the shape of the membership functions. Consequently, a fuzzy model for road traffic safety evaluation is established. Moreover, a more careful evaluation is obtained on the basis of fuzzy model classification. Finally, the evaluation process is illustrated by a case study.

Abstract:This paper presents a description of the two completely contrary evaluation conclusions from two intercity train scheduling evaluation models based on the fuzzy mathematics, and an analysis of the fundamental reason causing these conflicting conclusions after comparing the differences between the two models. Finally, a proposal is put forward on how to apply these two models in a reasonable way.

Abstract:比较了不同种类金离子吸附剂的吸附能力以及应用范围,特别是新近出现的含有大量胺基和亚胺基的芳香聚合物的优良吸附能力.作为芳香胺聚合物吸附剂的杰出代表,聚1,8-萘二胺对于金离子的吸附容量高达2 874mg·g-1,远高于性能较好的活性炭纤维的吸附容量,而且可以直接将金离子还原为单质金,有可能成为新型的金溶液电解后处理工序.

Abstract:This paper presents a study of the precipitation and coprecipitation of the B species ions which can be only complexed with hydroxyl by a numerical stimulation method based on the mechanism of balance on multi-ions reaction. The coprecipitation of A and B species ions is also investigated. The dependences of coprecipitation rate, side reaction rate and pH value on the ammonia contents are exhibited and discussed.

Abstract:通过研究烟气脱硫石膏在矿渣水泥中的处置利用方式,确定其在水泥生产中应用的可行性.结果表明,一定条件下进行热处理后的脱硫石膏掺入矿渣水泥后,在一定程度上可改善水泥的物理性能,提高水泥的强度,并可有效调节水泥的凝结时间;不同的热处理条件和脱硫石膏在矿渣水泥中的掺量对水泥性能有不同的影响.

Abstract:由一系列不同细度的辅助胶凝材料、纯硅酸盐水泥按4:6(质量比)组成各种复合胶凝体系试样,以各试样的早期水化结合水指标作为化学活性匹配参数,各试样实测堆积密度与计算堆积密度之比作为颗粒群堆积密实程度参数,将各试样28 d胶砂活性分别与化学活性匹配参数、颗粒群匹配密实程度参数进行灰色关联分析.结果表明:复合体系颗粒群的化学活性匹配以及颗粒群堆积密实程度与28 d胶砂活性的关联度较为相近,在0.65～0.75之间,说明它们对复合体系的活性影响程度相近;化学活性匹配和颗粒群堆积密实程度对强度影响的权值也较为相近,

Abstract:Based on the theoretical deduction of jack thrust, the historical data are analyzed and the relationship between geological condition and the thrust of jack is derived. In real-time control, the controller sets the value of the jack thrust based on the prediction of Radar. According to fuzzy control theory, the deviation thrust of jack is obtained on the basis of the automatic measuring system. With prediction thrust and deviation thrust, the controller controls the shield machine successfully.

Abstract:对热湿交换过程进行质量与能量衡算,建立逆流板式蒸发冷却器传递过程的数学模型.分析了刘易斯数、刘易斯关系式与刘易斯因子之间的区别与联系;计算得到了蒸发式冷却器空气与水热湿交换过程的刘易斯因子取值范围大约在0.75～0.95之间,其受水温和空气湿球温度影响较大.分析了刘易斯因子取值在0.5～1.5范围内对冷却器流体出口状态、热量交换与冷却效率的影响,以及应用刘易斯关系式所导致的误差,结果表明应用刘易斯关系式导致的冷却效率相对误差小于2%,工程应用该简化是合理的.

Abstract:高温持久强度试验和微观结构分析显示,某热电厂材质为F12(X20CrMoV12.1)主蒸汽管道经1.65×105 h运行后,材料的力学性能和组织结构产生明显的退化或损伤.尽管没有发现蠕变空洞或裂纹等动态缺陷,但微观结构表现出明显的脆化倾向和蠕变损伤特征,弯管部分尤为显著.服役材料的持久强度试验结果和主蒸汽管线运行状态下的有限元方法应力计算分析表明,该主蒸汽管道的再设计许用应力值已不能满足继续安全运行1×105 h的基本条件.最后对其剩余使用寿命做出评价.

Abstract:This paper presents an introduction of the methods of natural ventilation potential analysis of office building. Analyses were made of the natural ventilation potential of office buildings in some cities of China and the influence factors on the natural ventilation potential. Finally, the paper provides the results of the effectiveness of natural ventilation, average ventilation rates and standard deviation of the office buildings in these cities.

Abstract:Scheduling for semiconductor wafer fabrication is an important problem in actual production of manufacturing system, it is also one of the difficult problems of theory research. Genetic algorithm is a major object of computational intelligence study. So, the study on genetic algorithm-based semiconductor wafer fabrication scheduling has been paid much attention in the past few years due to its research value and significance in numerous applications. The application of genetic algorithm in semiconductor wafer fabrication scheduling is reviewed. This paper presents a comprehensive survey on the issues such as encoding, operation, parameter choice, improvement and real application. Some problems worthy of further study and the probable developing trends in the field are also presented.

Abstract:由于web服务描述语言(WSDL)过于注重信息交流的底层技术而忽略其在语义方面的功能,所以需要在WSDL文档中添加语义,即语义标注.提出基于概念频率的web服务语义标注方法,通过得到概念的不同属性的使用频率,进而转化成各属性在标注中的权值来提高语义标注的准确性,并且通过实验验证了改进后的算法相对于原算法在标注准确性方面有所提高.

Abstract:计算了一组心磁和心电检测信号的关联维数和最大李亚普诺夫(Lyapunov)指数.心磁和心电信号的关联维数分别在2.28±0.27和1.12±0.13范围内,最大Lyapunov指数分别在0.68±0.12和0.32±0.04范围内.对其它4组数据中心测点的计算结果也说明心磁和心电信号具有混沌特性.此外,结果显示心磁边缘测点的混沌吸引子与中心部分有明显差别,可用于分析信号的有效检测范围.

Abstract:介绍"Jupiter"GPS接收机与计算机的异步串行传输技术,以及WGS-84坐标与北京54坐标之间的转换方法.采用MapX5.0控件内嵌可视化编程语言VC 进行开发,实现GPS信号的采集、存储和显示,并建立基于GIS的定位系统,实现数据的实时显示、记录回放、点击定位等多种功能.该GPS接收机软件不但可用于"Jupiter"GPS接收器,还可通过串口配置,适用于任意遵循NMEA-0183协议的接收机,通用性和扩展性强.

Abstract:This paper presents some improvements on the convergent criterion and activation function of the traditional BP neural network algorithm, and also the measures to prevent vibration, accelerate convergence and avoid falling into local minimum. The result of applying the improved network to deformation monitoring data processing indicates that the improved one is better than the traditional one in the aspect of precision.

Abstract:通过研究李代数的既约包络代数的极小左理想来研究李代数的不可约模,对于htx＜1,确定了特征p=2上的Witt代数W(2,1)的x-既约包络代数的所有极小左理想.给出了特征标为x的不可约模同构类的代表元的集合以及它们的维数.

Abstract:利用单位球上的Green形式将单位球上的问题转化到了单位球面上,利用单位球上的H2 Hardy空间定义出一个算子.在证明这样的算子有界的情况下,利用Hahn-Banach定理及Reize表示找到了(-6)方程的解,并且给出了此解的范数估计.

Abstract:对新型的液晶材料5-正丙基-2-(3,5-二氟苯基)嘧啶的合成路线进行了改进.从3,5-二氟苯甲腈出发,通过加成、取代、环合等反应得到5-正丙基-2-(3,5-氟苯基)嘧啶,总收率为51.6%.其中通过正戊醛,利用Vilsmeier 试剂,以81.8%的收率实现了中间体2-正丙基-3-二甲氨基丙稀醛的合成.

Abstract:报道了用改进的布里奇曼(Bridgmam)法生长的大尺寸PbWO4:Y晶体光谱性能均匀性的研究.通过对依次切自大尺寸PbWO4:Y毛坯晶体的籽晶端、中间部位和顶端三块晶体(24 mm×24 mm×24 mm)的透射光谱、X-ray激发发射光谱、发光衰减寿命、光产额和辐照损伤等方面的光谱性能测试,表明了Y掺杂能显著改善PbWO4晶体的光谱性能,使晶体在短波330～420 nm范围的透过率明显提高,抗辐照能力增强.

Abstract:This paper presents a study of oriented carrier-wave in photo-elasticity mechanics and the distributing of luminous intensity. At the same time the distributing rule of stripe of oriented carrierwave of photo-elasticity has also been analyzed, presenting a new method of photo-elasticity with oriented carrier-wave for testing direction of principal stress. According to this method, an apparatus of oriented carrier-wave of photo-elasticity was designed and fabricated and, then put into traditional photo-elastic equipment, so the stress trajectories map was obtained including the direction of principal stress, The number of photo-elastic stress patters and stress trajectories was obtained with image processing methods and the precision of photo-elasticity method was improved a lot,paving a way for the application of optical engineering in the photo-elasticity mechanics field.