A glance at the relation of stepwise coupling polymerization to supramolecular chemistry

A relationship between supramolecular chemistry and stepwise coupling polymerization (SCP) found by our group is briefly described. By SCP reaction a series of new kinds of microstructure-controlled polymers and their corresponding supramolecular inclusions such as: (1) reactive ladder-like polysiloxanes (LPS); (2) liquid crystalline ladder-like polysiloxanes and their metal complexes including fishbone-like LCPs (FBLCPs) and their metal complexes (M-FBLCPs) and rowboat-like LCPs (RBLCPs); (3) tubular polymers (TPs) and their supramolecular inclusions (TPIs) and (4) sieve-plate-like network polymers (SNPs) and their supramolecular clathrates (SNPC) have been successfully prepared. It is reasonably stated that SCP is a supramolecular interaction-aided reaction and moreover, SCP is an effective method to generate new supramolecules.     

A learning-based prediction-and-verification segmentation schemefor hand sign image sequence

We present a prediction-and-verification segmentation scheme using attention images from multiple fixations. A major advantage of this scheme is that it can handle a large number of different deformable objects presented in complex backgrounds. The scheme is also relatively efficient. The system was tested to segment hands in sequences of intensity images, where each sequence represents a hand sign in American Sign Language. The experimental result showed a 95 percent correct segmentation rate with a 3 percent false rejection rate     

固定转化器泄漏原因分析

采用化学、金相分析方法,结合腐蚀的基本原理,对热交换器的泄漏进行了综合分析,认为造成泄漏的主要原因是循环水中存在大量的氯离子,破坏了蚀剂的保护作用。致使管子产生曜慢穿洞泄漏。     

低能耗熔盐电解金属锂电解槽的开发及研究

近年来,金属锂在全固态锂电池、铝锂合金制备中发挥着不可替代的价值,但金属锂生产成本仍然是生产企业需要解决的问题。因此,从降低能耗角度优化生产工艺及设备角度利用Solid Works三维建模电解槽结构,以及ANSYS仿真模拟软件对电解槽进行热场模拟及计算,得出最优设计方案。生产电解效率可达到91%,能耗在35 kWh/kg以下,抽氯和集锂装置可以自动运行,抽出氯气浓度90%,集锂效率可达到80%以上,且出锂量较为稳定。该设备可以更好的投入产业化生产,满足企业降低生产成本的需要,促进熔盐电解金属锂行业的发展。     

3340kVA整流机组节能技术改造

通过对3340kVA整流机组的技术改造,使其直流电流最大输出达到60hA,并且送电曲线后期功率可在较高的功率下运行。产品品级率由原来的40％提高到90％以上,降低了能耗．     

Chlorine-free emission disposal of spent acid etchant in a three-compartment ceramic membrane reactor

Electrochemical technologies for the on-site treatment of spent acid etchant have received great attention due their ease of operation and economic benefits. On the other hand, a large amount of Cl₂ is generated during the electrolysis process, which leads to potential environmental risks. In the present work, a novel threecompartment ceramic membrane flow reactor, including a cathode chamber, an anode chamber, and a gas absorption chamber was developed. The three chambers were divided by an Al₂O₃ ceramic membrane and a breathable hydrophobic anode diffusion electrode (ADE). The Cl₂ evolution onset potential of the ADE was increased to 1.19 V from 1.05 V of the graphite felt, effectively inhibiting the chlorine evolution reaction (CER). The anode-generated Cl₂ diffused into the gas absorption chamber through the ADE and was eventually consumed by the H₂O₂ adsorbent. Cu could be recovered without emitting chlorine due to the special structure of reactor. The current efficiency of copper precipitation and cathode reduction from Cu²⁺ to Cu⁺ reached 97.7% at a working current of 150 mA. These results indicated that the novel membrane reactor had high potential for application in the copper recovery industry.     

再谈GRC轻质空心隔墙条板

１前言GRC所具备的优良力学性能及其方便灵活的工艺模造性能,使得它在许多领域都得到了应用,特别对于那些薄壁异型的构件,GRC材料更显示了其独特的优势,将GRC用于空心隔墙条板的外壁,则充分发挥了GRC材料抗弯强度高和抗冲击性能好的特点。作为一种用量大而且具有质量标准的产品,空心隔墙条板标准中都对板的面密度规定了具体指标,但是由于受圆形孔洞空心率的局限,当以砂浆为基体材料时,６０mm厚度圆形孔洞空心隔墙条板的面密度约为８７kg／m２,９０mm厚度圆形孔洞空心隔墙条板的面密度约为１１７kg／m２。为降低面密度,在无…     

成组立模法生产技术的应用与发展

１前言成组立模是将立式模板进行成组化处理之后而形成的一种生产用装备,特别适用于生产建筑板材尤其是建筑墙板。与其他成型工艺相比,成组立模法生产技术的特点为：①成型精度高。相邻模板之间的空腔即为成型板材的模腔,板材的两个表面均为模板面,控制好模板的刚度和成组立模的制造精度即可保证板的成型精度,板材尺寸的准确性受人为因素的影响小。②对材料的适应性强。可采用多种无机胶凝材料及各种材料匹配,以生产具备不同性能特点的板材。③可生产多种结构形式的板材,如实心板、多孔板及各类夹芯式复合板。④工艺稳定性好。料浆浇…     

发动机大型复杂组合结构的静动态设计CAD系统的应用

应用CAD和运用优化设计技术、仿真技术、模型技术等现代工程设计方法,构成发动机复杂组合结构静、动态设计系统,可以解决发动机设计中的决策和可靠性问题。应用该系统可提高工程设计质量,并缩短研制过程。     

Orlicz序列空间的k—端点,k—光滑点

给出了Ｏｒｌｉｃｚ序列空间ｌ（Ｍ）的ｋ－端点、ｋ－光滑点的判据,同时得到了ｌ（Ｍ）是ｋ－严格凸、ｋ－光滑空间的充要条件。