复杂排沙廊道泄流能力分析研究

排沙廊道是水电站设计中常见的一种建筑物,在工程设计中对于一些形态弯曲、结构及流态复杂的排沙廊道,目前能有效测算其泄流能力的计算公式并不多见。以南盘江大桥水电站为例,基于水电站首部枢纽水力学模型试验资料成果,以能量方程为基础,从单位流量所产生的阻力损失进行分析,建立了本工程复杂廊道泄流能力计算公式,计算成果同模型试验成果相吻合,可供类似工程设计参考,也为类似复杂建筑物泄流能力分析提供了研究思路。     

The Winding Gallery in the Lingering Garden

廊是园林中常见的建筑物,是具有明晰的几何关系的线型空间。留园中的廊,不论从它所传达出的文化内涵和意境来看,还是从它所体现的设计过程和手法来看,都具有极好的研究价值。通过对留园廊的研究,不仅能更好地感悟留园的布局、建筑空间等,还能对苏州古典园林中廊的设计特点和艺术效果获得更多、更好的了解。     

浅谈综合管廊电气设计

随着我国的城市建设的快速发展,综合管廊越来越多的应用在市政建设工程中。电力系统既是综合管廊的主要使用对象,又是综合管廊安全使用的重要环节。由于国内还未有综合管廊的设计规范,本文结合工程设计实例,简要总结了综合管廊的电气设计中供配电系统、照明、消防等内容的心得体会。     

Adsorption of toluene from aqueous solutions using clay-based nanostructures

In this study, porous clay heterostructures (PCH) are synthesized through gallery template approach and characterized using X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), and Nitrogen adsorption–desorption techniques. Batch adsorption studies are conducted to investigate the effect of parameters such as adsorbent dosage, pH, concentration, and contact time on adsorption of toluene by PCH in aqueous solutions. Equilibrium data were fitted to the Langmuir and Freundlich models. Based on the results, by increasing the PCH dosage from 0.5 g/L to 4 g/L, toluene removal is enhanced from 34% to 88.1%.     

浅谈中国传统民居结构与材料

针对我国传统民居常见的结构与材料进行了分析总结，着重从我国城镇民居的圆楼瓦面、外墙装饰、影壁和照壁、游廊四个方面展开了论述，以使人们认识中国传统民居，在住宅建设方面真正体现出中式风格的回归。     

Learning small gallery size for prediction of recognition performance on large populations

This paper addresses the estimation of a small gallery size that can generate the optimal error estimate and its confidence on a large population (relative to the size of the gallery) which is one of the fundamental problems encountered in performance prediction for object recognition. It uses a generalized two-dimensional prediction model that combines a hypergeometric probability distribution model with a binomial model and also considers the data distortion problem in large populations. Learning is incorporated in the prediction process in order to find the optimal small gallery size and to improve the prediction. The Chernoff and Chebychev inequalities are used as a guide to obtain the small gallery size. During the prediction, the expectation–maximization (EM) algorithm is used to learn the match score and the non-match score distributions that are represented as a mixture of Gaussians. The optimal size of the small gallery is learned by comparing it with the sizes obtained by the statistical approaches and at the same time the upper and lower bounds for the prediction on large populations are obtained. Results for the prediction are presented for the NIST-4 fingerprint database.     

Photonic quantum ring laser of 3D whispering cave mode

A new whispering cave mode (WCM), a three-dimensional (3D) case of Lord Rayleigh's 2D whispering gallery modes, based upon 3D total internal reflection is presented, where GaAs quantum well (QW) near-vertical microdisk resonators exhibit a strong carrier-photon coupling for the QW carriers located in the Rayleigh band, generating 2D-to-1D carrier phase transitions of photonic quantum ring (PQR). It is a ‘photonic’ quantum corral effect (PQCE), whose simulation work produces a tangled web pattern of imminent recombinant carriers in picoseconds timescale. The PQCE is responsible for the ultralow threshold currents below 300 nA for a single mode GaAs PQR laser, and a prototype GaN PQR laser with a threshold near and below 1 μA.     

在Auto CAD R14中创建标准件图形库

利用 Auto CAD R14绘图软件将机械工程中常用的标准件 ,如螺钉、螺母、垫圈等制做成标准图形 ,并集成一个图形文件库。然后制做成图标菜单或工具条 ,以解决工程技术人员在制图中重复性绘图造成的浪费 ,提高其绘图的工作效率     

某综合管廊加层改造前检测评估

管廊是化工区常见的一种工业构筑物。随着社会经济的发展,化工企业需要进行技术工艺改造、增加产能等,必要时需对管廊进行加荷或加层。结合上海某化工区综合管廊加层改造前的检测评估工作,对化工环境下旧管架加层前检测评估进行分析。