框架结构地震反应的弹塑性时程分析

叙述了时程分析方法的原理，并用该方法计算了钢筋混凝土框架结构的弹塑性地震反应。通过按照时程分析法原理用MATLAB语言进行计算机编程，得出了结构的地震反应时程曲线。     

框架-核心筒结构的多维随机地震反应分析

为了同时考虑地震动的多维性与随机性对结构反应的影响,鉴于多维地震动主轴方向各分量不相关的假设,建立了一类多维非平稳地震动的降维模拟方法。首先通过建模生成了多维非平稳地震动的代表性时程,进而通过分析代表性时程集合的二阶统计特性验证了本文方法的有效性。同时,以此时程作为地震动输入,分析了一个33层框架-核心筒结构在不同地震动输入方式（一维、二维及三维）下的随机动力反应,进一步验证多维非平稳地震动的降维模拟方法的工程适用性     

多维跨界互动式教学模式创新的实践探讨

教学方式的选择,直接影响知识在传递更新与积累拔高过程中的损益效果,并进而影响行业技术水平与理论研究成果的提高与突破。结合"2018西部九校+《规划师》杂志社(9+1)建筑类本科联合毕业设计暨‘中晟杯’设计竞赛"教学实践活动,探讨跨地域、跨学科、跨空间、跨领域、跨群体多维跨界的互动式教学实践,以拓宽学生视野,实现多方机构互惠共赢,推动师生之间的教学相长,落实教育资源共享共用理念,推进互动式教学模式的创新。     

Experimental Study on Difference in Reflood Core Heat Transfer among CCTF,FLECHT-SET and Predicted with FLECHT Correlation

It has been reported that the core heat transfer coefficients measured in the CCTF tests, which were conducted under the conditions expected to appear during the refiooding period in a PWR, can not be predicted well with the FLECHT correlation, which has been used in the safety evaluation. In order to investigate the reason for this, a CCTF test was conducted under the typical FLECHT-SET experimental conditions. Investigating results from both tests, the following has been clarified:

The FLECHT correlation can not describe the heat transfer for the refiooding situations with the initial Accumulator injection period, which is expected to appear in a PWR, and gives much lower values than the measured. The core heat transfer in the FLECHT-SET is similar to that in the CCTF, and they are well predicted with the Murao-Sugimoto correlation. When there is some core radial power distribution, which strongly affects the heat transfer in a large vScale core, the heat transfer coefficients in the CCTF can be well predicted with taking account of this effect in addition to the Murao-Sugimoto correlation.     

Multi-dimensional Evaluation of Recent Neighbourhood Renewal Projects in Beijing: Case Studies on Shichahai and Jinyuchi Neighbourhoods

Most of Chinese cities have experienced a great wave of large-scale neighbourhood renewal in recent years. However, only a few research works have been done in giving assessment after the completion of renewal projects. Aimed at such a circumstance, this paper, by referencing the experience of European countries, establishes a multi-dimensional evaluation framework to analyze the primary data drawn from recent household surveys of Shichahai and Jinyuchi neighbourhoods in Beijing, and puts forward some suggestions based on the conclusions drawn from the surveys.     

高层隔震结构多维非线性时程分析

采用SAP2000的结构分析软件,对某高层框架结构进行在多维地震波输入下的非线性时程分析.计算和比较的结果表明:高层建筑中采用基础隔震也能收到良好的效果,特别是绝对加速度反应将会大大降低;多维地震动作用下,完全对称、各层刚度相同的结构反应不一定会增大,带大底盘、各层刚度有变化的框架结构反应会增大;裙房对于高层建筑的隔震...     

多维多阶调制格式产生方案的比较研究

随着带宽需求的不断增长,多维多阶调制格式成为目前研究的热点.文章对8PSK(3阶相移键控)、8QAM(3阶正交调幅)和16QAM(4阶正交调幅)的实现方式从原理和拓扑结构上进行了综合性的比较研究.使用已商用的调制器件,通过串行或串并混合的结构配置,可以得到8PSK、8QAM和16QAM的调制光信号;而使用并行结构的配置...     

三跨飞燕式异型钢管混凝土拱桥地震反应及控制

利用ANSYS有限元软件,计算并分析了某三跨飞燕式异型钢管混凝土拱桥的动力特性和一致激励与行波激励下的动力响应,并对拟安装在桥上Lock-up装置的减震效果进行了评价.研究表明,纵向和竖向联合输入下结构的动力反应明显高于纵向和竖向单独输入工况;横向地震激励时,拱肋出平面位移及内力均很大,但可以不考虑行波效应的影响;纵向...     

轴向等距分布式外科手术多维力传感器设计

为了精确采集手术机器人的多维作用力,提出了一种轴向等距分布式多维力测量传感器及其解耦方案,根据三条光纤布拉格光栅(FBG)的受力情况通过最小二乘法进行初步解耦,鉴于多种外部因素所造成的传感器输入与输出数据的非线性关系,基于前馈神经网络实现传感器的最终解耦。实验结果表明,所提出的传感器测量精度较高,解耦方法切实有效,能够准确测量手术过程中工具杆的受力情况。     

Fluorescence Intrinsic Characterization of Excitation-Emission Matrix Using Multi-Dimensional Ensemble Empirical Mode Decomposition

Excitation-emission matrix (EEM) fluorescence spectroscopy is a noninvasive method for tissue diagnosis and has become important in clinical use. However, the intrinsic characterization of EEM fluorescence remains unclear. Photobleaching and the complexity of the chemical compounds make it difficult to distinguish individual compounds due to overlapping features. Conventional studies use principal component analysis (PCA) for EEM fluorescence analysis, and the relationship between the EEM features extracted by PCA and diseases has been examined. The spectral features of different tissue constituents are not fully separable or clearly defined. Recently, a non-stationary method called multi-dimensional ensemble empirical mode decomposition (MEEMD) was introduced; this method can extract the intrinsic oscillations on multiple spatial scales without loss of information. The aim of this study was to propose a fluorescence spectroscopy system for EEM measurements and to describe a method for extracting the intrinsic characteristics of EEM by MEEMD. The results indicate that, although PCA provides the principal factor for the spectral features associated with chemical compounds, MEEMD can provide additional intrinsic features with more reliable mapping of the chemical compounds. MEEMD has the potential to extract intrinsic fluorescence features and improve the detection of biochemical changes.