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关键词： 输水渡槽   水利工程   渗漏问题   问题成因   处理措施  

摘要： 在H市某项水利工程中,建设期间出现伸缩缝渗水、漏水问题,对其整体建设效果造成很大影响。为了妥善解决伸缩缝渗漏问题,技术人员在作业现场开展全面的分析工作,最终确定渗漏问题原因,并根据成因制定有针对性的处理工艺,使得渗漏问题得以较好的处理,促进整体项目顺利开展。为此,本文文章对该项目的具体情况开展分析,同时制定一些合理的意见和措施,望能够对同类型项目处理发挥出借鉴作用。

关键词： 市政道路桥梁工程   伸缩缝   施工质量  

摘要： 随着伸缩缝施工技术的不断发展和改进,伸缩缝施工技术在路桥建设中起着越来越重要的作用,并且伸缩缝的施工质量影响着所有路桥设备的施工效果,同时,它对路桥施工的美观和安全起着重要的作用。因此,在建设路桥伸缩缝时,对伸缩缝进行质量控制,可以大大减少地下水进入的可能性,可以有效地防止对路桥结构的破坏,因此,加强伸缩缝的施工对提高桥梁施工质量和保证道路桥梁的正常使用等具有重要意义。

关键词： 屋顶绿化   植物选择   植物设计  

摘要： 随着我国城市化进程的加快进行,城市绿化受到日益严峻的挑战,为了在有限的城市空间提高绿化率,发挥绿化对调节城市环境的重要作用,贯彻绿色发展的理念,还要高度重视做好屋顶绿化,基于屋顶绿化改善城市环境,消除热岛效应的不利影响。本文对城市屋顶绿化进行分析,对屋顶绿化植物选择与合理设计进行研究,从而达到提高屋顶绿化建设质量的目标。

关键词： 屋顶绿化   绿色建筑设计   策略  

摘要： 随着经济的不断发展,人们逐渐对保护环境重视起来,着重进行低碳生活,最大限度地进行资源消耗,减少工业化城市对于环境的污染,为人们提供舒适的生存环境,创建人与自然的可持续发展。“屋顶绿化”作为绿色建筑设计发展的新亮点,本身作为一种经济与环境相融的存在,在美化环境的同时,还可创造经济价值。

关键词： 森林公园   资源调查   景观评价   功能分区   发展策略  

摘要： 以江西鄱阳莲花山国家森林公园为研究对象,对该森林公园内的森林风景资源进行了调查评价,对其进行功能分区及核心景观区、一般游憩区、管理服务区、生态保育区等进行了发展定位,提出了森林公园发展策略。

关键词： Cellular neuroscience   Epigenomics   Gene expression profiling   Molecular neuroscience   Motor cortex   Science   Humanities and Social Sciences   multidisciplinary  

摘要： Single-cell transcriptomics can provide quantitative molecular signatures for large, unbiased samples ofthe diverse cell types in the brain(1-3). With the proliferation of multi-omics datasets, a major challenge is to validate and integrate results into a biological understanding of cell-type organization. Here we generated transcriptomes and epigenomes from morethan 500,000 individual cells in the mouse primary motor cortex, a structure that has an evolutionarily conserved role in locomotion. We developed computational and statistical methods to integrate multimodal data and quantitatively validate cell-type reproducibility. The resulting reference atlascontaining over 56 neuronal cell types that are highly replicable across analysis methods, sequencing technologies and modalities-is a comprehensive molecular and genomic account ofthe diverse neuronal and non-neuronal cell types in the mouse primary motor cortex. The atlas includes a population of excitatory neurons that resemble pyramidal cells in layer4 in other cortical regions(4). We further discovered thousands of concordant marker genes and gene regulatory elements for these cell types. Our results highlight the complex molecular regulation of cell types in the brain and will directly enable the design of reagentsto target specific cell types in the mouse primary motor cortex for functional analysis.

关键词： Genome informatics   Motor cortex   Science   Humanities and Social Sciences   multidisciplinary  

摘要： Full-length SMART-seq(l) single-cell RNA sequencing can be used to measure gene expression at isoform resolution, making possible the identification of specific isoform markers for different cell types. Used in conjunction with spatial RNA capture and gene-tagging methods, this enablesthe inference of spatially resolved isoform expression for different cell types. Here, in a comprehensive analysis of 6,160 mouse primary motor cortex cells assayed with SMART-seq, 280,327 cells assayed with MERFISH2 and 94,162 cells assayed with 10x Genomics sequencing(3), we find examples of isoform specificity in cell types-including isoform shifts between cell types that are masked in gene-level analysis-as well as examples of transcriptional regulation. Additionally, we show that isoform specificity helps to refine cell types, and that a multi-platform analysis of single-cell transcriptomic data leveraging multiple measurements provides a comprehensive atlas of transcription in the mouse primary motor cortex that improves on the possibilities offered by any single technology.

关键词： Urea  

摘要： The development of reprocessable and healable room temperature photoactuators from a main-chain azobenzene (azo) liquid crystalline poly(ester-urea) (PEU) is described for the first time. The azo PEU was prepared via Michael addition polymerization of an ester and urea unit-containing azo monomer with both acrylate and methacrylate end-groups and 1,2-ethanedithiol. It showed high thermal stability, low glass transition temperature, a broad range of a smectic liquid crystalline phase, reversible photoresponsivity, and dynamic hydrogen bonding interactions among urea groups. Its well-oriented fibers and films were prepared via the melt spinning method and special melt pressing approach, respectively, whose azo mesogenic alignment was along the fiber axes and homeotropic to the film surfaces, respectively. The fibers showed highly reversible UV light-induced bending (toward the light source) and visible light-induced unbending, whereas the films exhibited rapid and reversible bending (away from the light source) under UV irradiation alone together with the spontaneous quick unbending upon turning off the UV light (both at room temperature). The reasons for the special photomobile behaviors of the azo PEU films and the decisive role of the urea unit-induced physical crosslinking in their photomobility were disclosed. The successful fabrication of a remotely controlled electric circuit by using a photodeformable azo PEU film (with attached filter paper slips soaked with aqueous NaCl solution) as a photoswitch as well as the high reprocessability and healability of the azo PEU actuators was also demonstrated. Such a multifunctional main-chain azo PEU with good film-forming ability, room temperature photomobility, high reprocessability and healability holds much promise in various photoactuating applications.

关键词： 高速公路   桥梁工程   伸缩缝   质量控制  

摘要： 以恒太河大桥工程为例,简要介绍了高速公路桥梁伸缩缝的类型和安装思路,主要对其施工技术进行探讨,包括施工准备、割缝、开槽、型钢安装、混凝土浇筑等流程,最后提出几点质量控制策略,旨在保证高速公路桥梁伸缩缝安装施工的整体质量。