Designing high-quality urban street layouts has long been in high demand, but entangles notable challenges. Conventional methods based on deep generative models are yet to fill the gap on integrating both natural and socioeconomic factors in the design loop. In this paper, we propose a novel urban street layout design method based on conditional adversarial learning. Specifically, a conditional generative adversarial network trained on a real-world dataset synthesizes street layout images from the feature map, into which an autoencoder fuses a set of natural and socioeconomic data for a region of interest; The following extraction module generates high-quality street layout graphs corresponding to the synthesized images. Experiments and evaluations suggest that the proposed method outputs various urban street layouts that are visually and structurally alike their real-world counterparts, which can be used to support the creation of high-quality urban virtual environments.
为了确定城市燃气高压管道在人口密度高后果区泄漏定量风险评价中不同影响因素规律,本文采用定量风险分析软件中的弹坑模型和TNO多能量爆炸方法对高压燃气管道高后果区开展了定量风险分析.通过SAFETI软件对高压燃气管道高后果区泄漏的场景进行模拟,分析在"不同泄漏位置管线顶部、管线中侧及管线底部,不同泄漏类型小孔、中孔、大孔及管线破裂,不同风速1.5 m/s-F、4.3 m/s-D、8.0 m/s-D"下高压燃气管道高后果区各种危害后果的变化规律.研究结果对评估分析埋地燃气管线的风险,提高风险管控方案的针对性、精细化和有效性提供科学依据.
以四丰滑坡为例,从滑坡的工程地质特性、成因机理、滑坡影响分析入手,采用瑞典条分法和有限元强度折减法(SRM)对该滑坡进行稳定性分析的研究,对比几种加固方案优缺点,提出削坡减载结合锚杆格构支挡加固边坡的方案,结合2种边坡稳定性分析方法的验证及实际加固效果的考察,都证明了本方案的有效性,为其他类似工程的滑坡灾害治理提供参考.
为实现最大限度发挥减震结构中阻尼器的耗能效率,本文研究了黏滞阻尼器耗能占比的计算方法及其影响因素.针对单自由度结构体系,基于能量分析法,推导并得出简谐激励下结构弹性和弹塑性状态时黏滞阻尼器耗能比的计算公式,利用有限元软件验证计算公式的准确性,并对附加黏滞阻尼器的SDOF体系进行能量时程分析.研究结果表明:阻尼器耗能比与频率比、阻尼系数、阻尼指数以及延性系数等参数相关;在地震作用下,将弹性结构的阻尼器出力之和与层间剪力比作为下限,附加阻尼比作为上限,给出阻尼器耗能比与阻尼参数的取值范围,弹塑性阶段阻尼器出力与结构层屈服力比远低于规范所规定的60％.
针对浙江省山区地质环境条件复杂、台风频繁侵袭、地质灾害频发的特点,本文以浙东南某乡镇为例,将斜坡单元为基本评价单位,在选取适当的评价指标体系对地质灾害时空分布及孕灾规律进行量化分析的基础上完成地质灾害易发性评价,分别开展不同重现期降雨量的地质灾害危险性评价和基于承灾体识别、易损性分析的风险评价,总结提出一条基于GIS的高精度地质灾害风险评价技术路线,可为当前正在开展的地质灾害风险调查评价工作提供一些借鉴.
