从近代建筑师的身世之考到近代城市建筑的“风貌”之变——以景明洋行创始人海明斯和伯克利为例

本文以景明洋行两位创始人海明斯和伯克利为研究对象,通过梳理他们的人生轨迹并借此重新解读其作品,探寻近代建筑师与城市建筑的"风貌"及转型之间的联系,明晰其在近代城市建设中的角色定位。     

蜂蜜中原蜜黄酮类化合物HPLC图谱比较分析

利用高效液相色谱比较分析不同蜂种、不同产地、加工与否以及不同蜜源蜂蜜中原蜜黄酮类化合物的种类及含量差异。结果表明,意大利蜜蜂油菜原蜜和中华蜜蜂油菜原蜜总峰数和峰形都比较相似,意大利蜜蜂油菜原蜜的总黄酮含量比中华蜜蜂油菜原蜜总黄酮含量高。不同产地的意大利蜜蜂油菜原蜜的图谱峰形整体相似,总黄酮含量和黄酮类化合物种类大致相同。加工后的商品蜜总黄酮含量减少,黄酮类化合物的种类也减少,商品蜜的高效液相色谱图显示其黄酮类化合物的出峰时间靠前,主要密集分布在水溶性的分离相中。3个不同蜜源蜂蜜原蜜黄酮类化合物高效液相色谱图的总峰数和峰形都有较大差异,油菜原蜜、洋槐原蜜及柑橘原蜜的总峰数分别为65、58、70个,柑橘原蜜的总黄酮含量最高,达161.62μg/100 g。单花蜂蜜原蜜黄酮类化合物的高效液相色谱图峰形具有一定的特异性,可以作为指纹图谱用于蜂蜜蜜源的鉴定。     

电力市场代理交易目标客户群体分析

为协助售电公司提升市场化售电服务质量,利用支持向量机-混沌时间序列模型对陕西省可参与市场化售电的用户用电量进行动态预测.然后根据对未参与市场化用户的用电预测偏差和成本降幅测算结果,对未参与市场化售电的用户进行分析与评估,并给出售电公司开展售电业务的代理建议.最后根据考核要求,利用已参与市场化客户的动态预测偏差值来进一步对客户是否被考核进行预警分析.初步应用结果表明,售电公司从这2方面开展代理业务已取得较好成果,可进一步深化应用.     

基于倒频谱的水电机组状态数据诊断方法研究

针对水电机组监测数据的特点,引入倒频谱分析方法,简要介绍了倒频谱的两种定义和信号分离方法,并设计了倒频谱算法的实现过程,最后以水电机组某故障特征数据开展倒频谱分析.结果表明,倒频谱方法是在复杂干扰背景下获取有用信息的一种有效手段,对于水电机组故障诊断从定性到定位的转变,具有一定的研究和应用价值.     

复兴路乙59-1号改造工程

复兴路乙59-1号改造工程位于西长安街的延长线，为一幢20世纪90年代初期设计建造的框架的9层办公楼的改造，该改造工程在保持原有建筑结构，功能。设施基本不变的基础上，对功能，空间和外观进行整理改善。     

Numerical simulation of a novel microfluidic electroosmotic micromixer with Cantor fractal structure

In this paper, we design a novel low voltage of electroosmotic micromixer with fractal structure. Because of the influence of high voltage on electrode and solution, we propose an electroosmotic micromixer of low voltage. In order to optimize the electrode position, we design the Cantor fractal according to Cantor principle, and arrange the electrode pairs on the fractal. Then we study the mixing effect of the electrode pairs length on the mixing performance, the effect of the electrode position and the effect of fractal electrode group spacing on the mixing efficiency. When the electroosmotic micromixer has three electrode groups at alternating voltage of 5 V and alternating frequency of 8 Hz, the best mixing efficiency can reach 95.2% in one second. We call this micromixer Cantor fractal electroosmotic micromixer (CFEM). At the same Re, the mixing efficiency of CFEM is higher than the electrodeless micromixer 50%.

     

Sniffer-Net: quantitative evaluation of smoke in the wild based on spatial–temporal motion spectrum

Smoke detection plays an essential role in the wild video surveillance systems for abnormal events warning. In this paper, we introduced a dedicated neural network structure named Sniffer-Net to simultaneously extract smoke dynamic feature robustly and evaluate the smoke concentration accurately. Firstly, we utilize an improved LiteFlowNet to estimate the global optical flow from image sequence. Meanwhile, a Marr–Hildreth method is brought up and fused into this network to distinguish and eliminate occluded regions from global flow map. Then, an evaluation module based on Context-Encoder network is put forward specially to quantify smoke concentration levels. This network, following the improved LiteFlowNet, is modified through replacing the loss function and removing the multiscale scheme and trained to infer approximate smoke optical flow behind occlusion regions. Starting from the statistical view, the irregular RGB/HSV feature spaces are converted into a specific quantitative evaluation space. As a result, the whole evaluation system is responsible to transform the distribution of irregular smoke motion feature into a quantified form of representation. In turn, this transformation endows the system with a novel numerical standard for smoke concentration evaluation. Finally, an accuracy assessment method is applied to compare the results of detected smoke concentration with the human experience prior model, which feedback the accuracy and false detection rate of system algorithm. In the experiments of five smoke datasets, our proposed smoke detection approach is superior to other state-of-the-art methods, and concentration algorithm achieves the satisfactory performance of 97.3% accuracy on some specialized dataset.

     

一种电动自行车充电桩的设计

针对目前电动自行车大量增加,同时充电问题困难的情况,设计了一种小区用刷卡付费电动车充电桩,可以解决小区内私拉乱接电线为电动车充电的问题。充电桩收费采用M1卡进行结算,通过时间控制继电器的通断实现电动车的充电,按照充电时间进行收费。充电剩余时间采用LED液晶显示,每台充电桩可以控制10路负荷的通断。该充电桩还能够对电动车充电负荷进行检测,当负荷超过限值时断开负载,保证电动车充电故障时能隔离故障。实践证明,充电桩能够正常付费工作,方便地解决了城市小区居民对电动车充电。     

舰船电力系统用1 MJ高温超导储能磁体设计研究

介绍了舰船电力系统用的1MJ螺管型高温超导储能磁体的设计优化步骤，给出了用Bi-2223超导带进行1 MJ磁体线圈的设计和优化结果，分析了高温超导体的各向异性对磁体临界电流的影响，讨论了储能容量一定的多螺管磁体系统在漏磁、储能密度和所需超导线材方面的变化。     

伸缩缝防渗结构聚脲基涂层剥离破坏研究

水工建筑物普遍存在伸缩缝渗漏破坏问题,其破坏机理亟待研究。本文基于南水北调工程实际背景,引入损伤断裂力学理论,建立了内聚力单元的有限元仿真模型,并根据防渗涂层剥离试验的反向压力-位移变形数据,给出了适合于聚脲基复合防渗体系黏接层内聚力单元的刚度和黏聚系数等参数。计算了剥离反向压力,分析了聚脲基防渗涂层厚度对剥离临界反向压力的影响,以及水压力和伸缩缝扩展位移工况下,涂层厚度、涂层弹性模量和内聚力单元切向黏接强度对涂层剥离破坏长度的影响。数值计算结果表明,剥离反向压力与剥离试验的结果基本一致,说明内聚力模型参数的合理,能够有效模拟聚脲基复合防渗涂层剥离破坏的力学机理。同时,水压力和伸缩缝扩展位移工况下的分析结果,也说明了建立的聚脲基防渗涂层破坏分析方法对伸缩缝的防渗设计具有定量的指导作用。