Technology of Extracting Polyphenols From Leaf of Tea

用正交实验方法探讨了茶叶中茶多酚的最佳提取工艺.研究结果表明:用4倍于叶重体积的水溶液加热回流提取4次,每次提取20min,用2倍于提取水溶液体积的乙酸乙酯萃取3次,茶叶中茶多酚提取效果最好,其平均浸出率可达86.3%

荔枝采后果皮保红研究

报道一种新型保红剂（ＬＪＱ－１）用于常温保持荔枝果皮红皮的试验结果．新鲜荔枝经ＬＪＱ－１浸泡处理１０ｍｉｎ后，在室温２３～３５℃，ＲＨ＝７０％～９３％条件下，贮放１５ｄ果皮颜色保持鲜红色

DETERMINATION THE TOTAL FLAVONOIDS CONTENT IN PEANUT HULLS

介绍了用分光光度测定法测定花生壳中总黄酮含量,采用丙酮提取,加权平均回收率在100.7%,相对标准差为1.8%,测定结果令人满意

Design and Implementation of Video Surveillance Terminal Based on MAP-CA

文章详细讨论了一种基于专用处理DSP芯片的视频监控终端的设计方法。该视频监控终端以MAP-CA为核心,采用MPEG-4编码技术,单芯片可实现两路CIF或一路D1实时编码,并支持多种云台协议。文中详细地描述了系统组成、结构和功能,对系统各个组成模块进行了详细分析和设计,主要包括视频输入、音频输入输出、I/O扩展、以太网模块、电源管理等,并给出系统的软件基本架构。In this paper,we introduced the designing method of video surveillance terminal based on video special DSP chip.The video surveillance terminal takes MAP-CA as the system core,supports dual channel CIF format or sigle channel D1 format real-time video coding using MPEG-4 standard and multiple PTZ control protocol.The detailed analysis and design of the functional modules in this system were presented,including video and audio modules,I/O extension,ethernet module,power management etc.And at last we gave the basic structure of the system software

Study on the Treatment of Chromium-Containing Indnstrialplating Wastewater with Zeolite

用沸石处理含铬工业电镀废水 ,可使六价铬的去除率高达 99% ,处理后的废水达到国家污水排放标

玻纤增强尼龙6复合材料界面微观力学行为仿真研究

本文基于双线性内聚力模型，采用Abaqus对玻纤增强尼龙6复合材料的纤维推出过程进行计算机仿真研究，成功计算了玻纤与尼龙6的界面强度，并利用纳米压痕试验进行验证．结果表明，仿真模型可以较好地模拟真实测试过程，样品的初始弯曲变形是测试结果与理论计算值存在差异的主要原因．单纤维推出过程的有限元模拟及试验为理解复合材料的界面性能提供了有效的方法，也为复合材料跨尺度失效准则及其损伤演化的研究提供微观力学模型. Based on the bilinear cohesion model, this paper employed Abaqus to conduct a computer simulation study on the fiber push-out process of glass fiber reinforced nylon 6 composite material. The interface strength between glass fiber and nylon 6 was successfully calculated, and the results were verified using the nanoindentation test. The simulation results were in good agreement with the test results. The initial bending deformation of the sample was the main reason for the difference between the experimental and the theoretical results. The finite element simulation and experiment of the single fiber push-out process test provide effective approaches for understanding the interface properties of composite materials, and also provide a micromechanical model for the study of the trans-scale failure criteria and damage evolution of the composite material. © 2022, Editorial Office of Chinese Quarterly of Mechanic. All rights reserved

新型空气悬浮式氧化风机的节能技术分析

本研究针对燃煤火电厂脱硫氧化风机，通过将罗茨式风机升级为新型的空气悬浮式风机，以提高氧化风机的运行效率和可靠性，降低能耗和噪声。结果表明空气悬浮式氧化风机采用的核心新技术包括永磁同步高速直联电机、无油空气悬浮轴承、单机单叶轮、内循环热交换冷却技术。无油空气悬浮轴承的工作原理是利用回转轴和轴承之间的相对运动形成流体动力场和浮扬力，使回转轴处于悬浮状态，无需润滑油，所以能量损耗极低，效率极高，能适用于 10 万转的大功率高转速机械。</jats:p

基于古地磁与~(230)Th定年的西沙西科1井乐东组生物礁沉积年代的初步研究

生物礁是重要的自然资源,在全球气候变化与碳循环中扮演了重要角色.磁性地层学是建立年代框架的有效手段,但是,由于生物礁沉积物中天然剩磁强度弱,南海地区生物礁的磁性地层学研究尚未很好展开.为此,本文利用西沙群岛西科1井乐东组生物礁沉积样品进行了详细的岩石磁学和磁性地层学研究.结果显示,西沙群岛乐东组记录了布容正极性时、奥杜维尔正极性时和松山负极性时.通过对比已有的钻孔资料,本文认为应基于岩石地层特征这一标准将西沙地区的乐东组埋深予以统一.在此基础上,综合磁性地层与~(230)Th定年结果,本文将乐东组的底界限定在~2.0 Ma.</p