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The invention relates to an electrochemical method for preparing ultra-fine tantalum powder, wherein it uses the mixture slat flux with CaCl2 or CaCl2 as electrolyte; composites Ta2O5 powder/block with metal collector as solid cathode; uses graphite or inertia anode as anode; uses reference polar to control the electrolysis level, under inertia gas to electrolyze at 500-1000Deg. C; and the electrolysis time should make electrolysis electricity reach needed amount; reduces Ta2O5 into ultra-fine metal tantalum powder.

本发明涉及一种超细钽粉的电化学制备方法，以CaCl2或者含有CaCl2的混盐熔体为电解质，将Ta2O5粉末或块与金属集流体复合作为固态阴极，以石墨或惰性阳极作为阳极，用参比电极控制电解电位在惰性气氛保护下进行电解，电解温度控制在500-1000℃，控制电解时间使电解电量到达到理论所需电量及以上，将五氧化二钽电化学还原为超细金属钽粉。

This topic uses .net advanced c # technology and completely uses b/s framework to overhead design development, uses the formidable communication platform to make the enterprise establish the preliminary joint operation mechanism, by then the user's problem, information exchange incommodiously between

本课题采用先进的c＃的。net技术，完全采用b/s架构设计开发，利用强大的通讯平台使企业建立初步的协同工作机制，解决用户内外部信息交流不畅通的现状，从而奠定知识管理的基础，自如应对知识经济的挑战。

The first synthetic route uses 1,2,4-trimethoxybenzene and chloroacetonitrile in forming 2,4,5-trimethoxy-a-chlor-acetophenone under the anhydrous condition, then the intermediate condensates with papaverine forming the core pyrro[2,l-a]isoquinoline, followed by formation and lactonization to form the lactone ring. The second synthetic route uses prepared aldehyde with prepared ethyl nitroacetate by Knoevenagel condensation to obtain 2-Nitro-3-(2,4,5-tris-methoxy-phenyl)-acrylic acid ethyl ester and 2-Nitro-3-(2,4,5-tris-benzyloxy -phenyl)-acrylic acid ethyl ester etal intermediates. The lamellarin skeleton could arise from condensation of the papaverine and these intermediates by Michael reaction, the ester group is provided for subsequent lactonization. The third synthetic route uses coumarin or indan-l,3-dione derivatives and papaverine to form lamellarin under basic conditions.

第一条路线首先从1，2，4-三甲氧基苯出发与卤乙腈作用合成卤代芳酮中间体，然后与罂粟碱反应合成开链片螺素，最后经乙酰化、去保护、成内酯环得到片螺素；第二条路线由制备的芳醛和制备的硝基乙酸乙酯经缩合得到2-硝基-3-芳基丙烯酸乙酯，然后由该中间体与罂粟碱反应，在完成关环的同时也引入酯基，最后去保护、成内酯环得到片螺素；第三条路线是由香豆素或茚二酮出发，经溴代后的中间体与罂粟碱反应，得到片螺素的基本框架。

The invention uses the fermentation liquor of one Escherichia coli generating polysialic acid as material, filters and removes thallus, adds some solvents as sodium chloride and alcohol into supernatant to deposit polysialic acid, dissolves the polysialic acid deposits via deionized water, filters to remove modified protein, uses alkali prolease to treat filtrate, complexes deposits via cetyl pyridinium chloride or cetyltrimethylammonium bromide, and dissociates, uses over alcohol to deposit polysialic acid, dissolves the deposits via ultra-pure water, grades and purifies via chromatography column, collects and dialyzes eluent, cools and dries to obtain polysialic acid.

本发明以一株产聚唾液酸大肠杆菌的发酵液为原料，经过过滤去除菌体，上清液加入适量氯化钠和乙醇等溶剂沉淀出聚唾液酸，聚唾液酸沉淀用去离子水溶解，再用过滤去除变性蛋白质，滤液经过碱性蛋白酶处理、氯代十六烷基吡啶或十六烷基三甲基溴化铵络合沉淀并解离后，再用过量乙醇沉淀出聚唾液酸，聚唾液酸沉淀用超纯水溶解，用层析柱进行分级纯化，收集洗脱液经过透析，冷冻干燥得聚唾液酸产品。

The invention discloses a digital good transaction system and the method. It mainly carries on coding process to at least one digital good in a content downloading center into a coded digital good, and the coded digital good will be transmitted to at least one content downloading station with real memory transmission path, when the consumer selects a digital good, the user can uses a content downloading card into a content downloading station, uses a reality transmission path to store the digital good to be purchased, and uses a network transmission wire to connect the content downloading center, the center incriminates the card number in order to generate a card number decoding data, and download the decoding data into a content downloading card, when the consumer want toe buy a digital good, the content can be downloaded into a content card reader, and the reader incriminate the card number to reduces the decoded data and the digital good, in order to generate the digital good which can be read and used.

本发明公开了一种数字商品交易系统及其交易方法，其主要是将至少一数字商品在一内容下载中心进行加密处理以成为一加密数字商品，而加密数字商品将以实际的储存器传递线路以直接送到至少一内容下载点中，当消费者选定一欲购买数字商品时，可持一内容下载卡至其中一内容下载点，利用一实体传输线路直接储存所欲购买的加密数字商品，并藉由一网络传输线路以连接内容下载中心，内容下载中心将根据卡号识别码以产生一卡号解密资料，并将卡号解密资料下载至内容下载卡，当消费者欲使用欲购买数字商品时，即可将内容下载卡置入一内容卡片阅读机中，而内容卡片阅读机将根据卡号识别码以还原卡号解密资料及加密数字商品，以产生可供读取使用的数字商品。

The article uses multiple regression statistics to analyze the past settlement academic achievement, proposes a calculation method that prorates the high school entrance examination results and the results of class sorting examination organized by the school so as to provide the basis for future calculation of the settlement academic achievement, bring it closer to the real student academic level; makes full use of the historical result data of the tests that students participated, traces and analyzes the experience of our students' growth, gives full play to the advantage of small class management mode in the large classes of our school, guides students to actively summarize their own academic achievement so as to search appropriate learning methods suitable for themselves and help them develop good learning psychology quality; In addition this article uses RANK function to analyze the balance of students' terminative academic achievement, uses Radar Chart, combined with the graphic illustration of the median and hundreds' digit to analyze students' terminative academic achievement, on the one hand to guide students to focus on their overall academic development, on the other hand, to provide students with the basis for choosing arts or science subjects during entering senior two of the high school from senior one; the article provides an easy-to-operate EXCEL template to facilitate teachers to gather the information about the diagnostic academic achievement in usual schoolwork and unit tests, so that forms a timely and precise feedback link, thereby facilitating teachers to master timely the learning conditions of the students, and adjust teaching objectives and teaching strategies based on the practical situation of the students, so as to better complete the teaching tasks.

利用多元回归统计分析以往的安置性学业成绩，提出以中考成绩与学校组织分班考试按比例折算的计算方法，为今后的安置性学业成绩计算提供依据，使其更接近学生真实的学业水平；充分利用学生在校参加各次测试的历史成绩数据，跟踪分析学生的学业成长历程，充分发挥我校大班小班化管理模式优势，指导学生对自我学业成就进行积极归因，寻找适合自己的学习方法，从而帮助学生形成良好的学习心理品质；利用RANK函数分析学生终结性学业成绩的均衡性，利用雷达图，结合中位数和百位数图示化分析学生终结性学业成绩，一方面引导学生关注自身全面的学业发展，另一方面，为学生在高一升高二文理分科时提供选择依据；提供操作简单的EXCEL模板，方便教师收集平时作业或单元测验中的诊断性学业成绩信息，使教学反馈环节及时精细，有利于任课教师及时了解学生的学习状况，根据学生实际情况调整教学目标和教学策略，从而更好地完成教学任务。

The design mains design about the loading-machine department of continuous-type caterpillar band coal-loading machine, the loading department uses the spider loading, the transportation system uses the scraper conveyer, the loading department and the department of transportation uses in common a group of oil motor to actuate, to take the place of the reduction gear, which makes the machine structure to be more compact and the revolution to be more coordinated, reduced the breakdown.

本设计是对连续式履带装煤机的装运部进行设计，装载部采用的是星轮装载，运输系统采用刮板输送机，装载部和运输部共用一组液压马达驱动，取消装载减速器，使机器结构更加紧凑，运转更加协调，减少了故障。

Petrochemical industry Rising stem resilient gate valve majopplications API standard gate valve, globe valve and check valves; electricity sector, mainly in power stations using high-temperature pressure valve, globe valve, check valve and safety valve, and part of the low-pressure water supply and drainage valve butterfly valve, gate valve; chemical industry is mainly made of stainless steel valve, globe valve, check valve; metallurgical industry Forged steel welding gate valve mainly uses low-voltage large-diameter butterfly valve, oxygen valve and oxygen valves; urban construction department used mainly low-pressure valve, Such as urban water supply pipeline used mainly large-diameter valve, floor, blending the building of the center line butterfly valve used mainly in urban heating primarily metal sealing butterfly valve; oil pipeline used mainly flat gate valve and ball valve; the pharmaceutical industry mainly uses stainless steel ball valve; the food industry mainly uses stainless steel ball valve and so on.

石化行业主要应用API标准的闸阀、截止阀和止回阀；电力部门主要采用电站用高温压闸阀、截止阀、止回阀和安全阀及一部分给排水阀的低压蝶阀、闸阀；化工行业主要采用不锈钢闸阀、截止阀、止回阀；冶金行业主要采用低压大口径蝶阀、氧气截止阀和氧气球阀；城市建设部门主要采用低压阀，如城市自来水管道主要采用大口径闸阀，楼寓建设主要采用中线蝶阀，城市供热主要采用金属密封蝶阀；输油管线主要采用平板闸阀和球阀；制药行业主要采用不锈钢球阀；食品行业主要采用不锈钢球阀等。

On the hardware electric circuit, uses MAX232 torealize PC machine and between the monolithic integrated circuit leveltransformation, uses the simple 3 systems connection methodrealization correspondence, soon PC machine and the monolithicintegrated circuit transmission data end and the receive data endcross connection, two groundings direct are connected; In the softwareprogramming, on PC machine was uses the existing string mouth to debugassistant software, the monolithic integrated circuit carries on theprogramming using the assembly language.

在硬件电路上，采用MAX232实现PC机与单片机之间的电平转换，采用简单的3线制连接方法实现通信，即将PC机和单片机的发送数据端与接收数据端交叉连接，两者的地线直接相连；在软件编程上，PC机上是采用了现有的串口调试助手软件，单片机则利用汇编语言进行编程。

This item only uses in belt swinging controls function product 13 wiring 14 posts 15 products will possibly have the small components, will not suit 3 year old and the following child uses 16th, left/right foot 17 φ19*90 sleeves 18 charts②Is only suitable for the model 3101 product uses before 19 monkey faces, the M10 nuts, the decoration ball, the screw rod, the seat cushion, the basket, the right foot pad, the left leg pad, the iron pipe, the bearing (6202), front wheel bracket fixing, the front wheel minor axis, trailing wheel fixed, the pickpocket who works on trains, the front wheel major axis, the weather board, the front fixed knob, the intercom hook young, the base plate, the tailstock, the tailstock box,ф5×18 machine the silk, the trigger, the accumulator cell (6V4AH), the battery charger 220V50HZ, the intercom hook young, Che 冚, the front wheel, the trailing wheel, the front fork board, the foot pedal refuel the board, the bicycle bell, the carriage, the front axle sleeve, the lamp wire, the intercom pressed key, four sections of switches, to turn left music pressed key, the loudspeaker pressed key, the display board 20 insert front wheel group belt iron pipe this end Che Dashen to install the position.

此项只用于带摇控功能的产品） 13 接线 14 端子 15 本产品可能会有小零件，不适合3岁及以下儿童使用 16、左/右脚 17 φ19*90套筒 18 图②只适用于型号3101产品使用 19 猴子脸、M10螺母、装饰球、螺杆、座垫、前篮、右脚垫、左脚垫、铁管、轴承(6202)、前轮固定架、前轮短轴、后轮固定件、小轮、前轮长轴、前挡风板、车头固定旋钮、对讲机钩仔、座板、车尾架、车尾箱、Ф5×18机丝、板手、蓄电池6V4AH）、充电器(220V50HZ 、对讲机钩仔、车冚、前轮、后轮、前叉板、脚踏加油板、车铃、车箱、车头轴套、灯线、对讲机按键、四段开关、左转弯音乐按键、喇叭按键、仪表板 20 将前轮组带铁管这端插入车大身安装位置。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。