Probabilistic learning on manifolds (PLoM) with partition

The probabilistic learning on manifolds (PLoM) introduced in 2016 has solved difficult supervised problems for the “small data” limit where the number N of points in the training set is small. Many extensions have since been proposed, making it possible to deal with increasingly complex cases. However, the performance limit has been observed and explained for applications for which N is very small and for which the dimension of the diffusion-map basis is close to N. For these cases, we propose a novel extension based on the introduction of a partition in independent random vectors. We take advantage of this development to present improvements of the PLoM such as a simplified algorithm for constructing the diffusion-map basis and a new mathematical result for quantifying the concentration of the probability measure in terms of a probability upper bound. The analysis of the efficiency of this extension is presented through two applications.     

Shape transformer nets: Generating viewpoint-invariant 3D shapes from a single image

Single-view 3D shapes generation has achieved great success in recent years. However, current methods always blind the learning of shapes and viewpoints. The generated shape only fit the observed viewpoints and would not be optimal from unknown viewpoints. In this paper, we propose a novel encoder–decoder based network which contains a disentangled transformer to generate the viewpoint-invariant 3D shapes. The differentiable and parametric Non-uniform B-spline (NURBS) surface generation and 3D-to-3D viewpoint transformation are incorporated to learn the viewpoint-invariant shape and the camera viewpoint, respectively. Our new framework allows us to learn the latent geometric parameters of shapes and viewpoints without knowing the ground truth viewpoint. That can simultaneously generate camera-viewpoint and viewpoint-invariant 3D shapes of the object. We analyze the effects of disentanglement and show both quantitative and qualitative results of shapes generated at various unknown viewpoints.     

以“动态”观点分析判断排除设备故障

主要介绍了“动态”观点分析判断设备故障的简单方法,并且通过2个现场的维修实例来加以说明,如何引导维修人员以“动态”观点分析、判断和排除设备故障,将设备故障以最短的时间内排除,值得借鉴。     

存在固定风量分支的通风网络解算新方法

当通风网络存在固定风量分支时，Scott-Hinsley风网解算方法将风压归零误差全部集中在固定风量分支上，从而增加了风量调节的难度。通过修正Scott-Hinsley方法的缺陷，提出了一种新的全回路调节方法，该方法理论上考虑到了通风网络中存在固定风量分支的情况，可实现所有回路的调节和按需分配归零误差。     

湿度独立控制空调系统的工程实践

结合实际工程介绍了一个以溶液处理新风实现湿度独立控制的空调系统，对系统的运行情况进行了测试，根据测试结果提出了一种送风含湿量的控制策略。测试结果表明，在室外潮湿的情况下，溶液除湿机组提供的冷量约占所需冷量的50％；在室外相对干燥的情况下，除湿机组提供的冷量约占所需冷量的40％。与传统电压缩制冷系统相比，当电热价比值为3时，湿度独立控制的空调系统可减少20％的运行费用。     

免疫空调系统的构建及其初步分析

基于建筑环境安全性的要求，提出了免疫空调系统的概念。免疫空调系统的构建原则为：热湿分开处理(独立除湿)、空气净化与杀菌消毒的综合集成处理、合理的空调系统形式与布置、新风可调以及紧急免疫。给出了两种可行的免疫空调系统形式：溶液独立除湿与蒸发冷却联合运行的系统、溶液独立除湿与机械制冷联合运行的系统。免疫空调系统具有盐水溶液的净化杀菌、设置紫外线杀菌装置、生物传感器检测有疫情出现时系统转入全新风运行等多重净化免疫机制。对所构建的免疫空调系统在运行费用、适用性等方面进行了初步分析，表明其具有较好的经济性和适用性。     

浅析我国老年住区的建设与发展

本文通过实例对混合老年住区及独立老年住区进行分析,论证未来我国老年住区建设的发展方向。     

武汉城市总体规划前期研究的实践与思考

新一轮的城市总体规划在时代背景、编制条件和规划统筹等方面发生了深刻变化,坚持科学发展观,提倡政府组织、专家领衔的研究过程,既是对总规技术统筹工作的考验,又是对总规修编组织运作的挑战.结合武汉新一轮城市总体规划的编制实践,介绍了前期研究的组织过程和得失经验,期望能够为大家提供一些有价值的参考.     

平台无关的分布式空间数据引擎技术初探

针对空间数据引擎提出平台无关设想.阐述平台无关的分布式空间数据引擎所需的技术及技术的实现.     

浅谈某商住小区基础方案的选择

从某市城区一商住开发小区地质勘探入手，通过对场地岩土工程条件、工程造价指标及实际试挖情况进行了分析对比，择优确定了地基基础方案，可供类似工程参考借鉴。