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蒸发结晶法制备APT工艺简单，但制备的APT粒径较大，严重降低了后续产品的质量。采用响应曲面法研究了搅拌速度、钨酸铵浓度、反应温度......
Revisiting processing time for metaphorical expressions： An eye-tracking study on eye-voice span dur
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基于span的联合抽取模型在命名实体识别和关系抽取上取得了优异的效果.这些模型将文本span作为候选实体,并将span元组视为候选关系......
The problem of increasing of reliability of pipeline transportation is one of the most actual problems in petroleum indu......
杭州湾海底管道是甬—沪—宁输油管道的重要组成部分.受海水冲刷的作用下,会产生海底管道的悬空现象,称之为管跨.海底管线在海流、......
Literature Review on Studying Preschool English Language Teaching from the Perspective of Critical P
【Abstract】Some critics have focused on studying preschool English language teaching from the perspective of critical p......
In order to ensure the construction quality and safety of small and medium span basket type steel box tied arch bridge,t......
This study proposes an intelligent data analysis model for finding optimal patterns in human activities on the basis of ......
1.高稳定性非离子Span 80/PEG 400/H2O囊泡的制备与性质研究通过振荡、超声的方法,成功地在Span 80/PEG 400/水三组分体系中制得了......
研究成功的新型手表游丝合金与原有的3J53合金(Ni—Span C)相比,具有高弹性,高抗磁性等优点.试验证明:这种新型合金制成的手表游丝......
Methane absorption and application of mixed organic aggregate prepared from Span80 and alkaline salt
The water-based materials for mine gas absorption and explosion suppression were prepared, in which the mixed organic ag......
以多重乳液相对体积为衡量标准,借助显微镜直接观察,考查影响α-亚麻酸多重乳液稳定性的表面活性剂的参数变化,以确定制备α-亚麻......
以甲基丙烯酰氧乙基三甲基氯化铵（DMC）、丙烯酰胺（AM）和丙烯酸（AA）为乳化单体,采用电导率法和目测法相结合的方式,考察了复合乳化剂的亲......
Realization approach of Pd-only three-way catalysts with high catalytic performance and thermal stab
Pd-only three-way catalyst(TWC),Pd supported on washcoating(the mixture of alumina and Ce-Zr solid solution)/cordierite,......
采用薄膜水化法,以Span-60、胆固醇和磷脂为材料,制备了基于非离子表面活性剂的百里醌前体脂质体(thymoquinone proniosomal formu......
合成的A沸石用盐酸溶液处理,回流4小时,然后用氯化铵溶液处理,再洗涤,干燥;制得的固体在450℃下煅烧1小时,得到了去铝酸和质子(酸)......
本文采用撞击流(IS)反应器作为乳化装置,Span80与Tween80复配作为乳化剂,对制备石蜡乳液的各影响因素进行考察,确定了石蜡乳液适宜......
以偶氮二异丁脒盐酸盐(V50)作为引发剂,失水山梨醇硬脂酸酯(Span60)和聚二甲基硅氧烷PEG-7磷酸酯为复合分散剂,蔗糖烯丙基醚和三甲......
[目的]建立一种简便、高效筛选高效氟氯氰菊酯纳米乳液最佳配方的方法。[方法]采用单因素及三角坐标图法,以乳液粒径、多分散系数......
Reinforce(1 ConcreteArch Bridges钢筋混凝土拱桥名次桥名跨度(米)国家竣工年代H县大桥Krk—l(East Span)江界河(音译)邕江大桥GI......
Martin Marietta复合材料公司的组合式Dura Span面板体系最近安装在美国俄勒冈州Astoria的Lewis & Clark吊桥上。此获专利的E-玻......
The design scheme of long span and low depth composite steel concrete beams is introduced, and the methods of avoidi......
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Considering both the axial force on the spanning pipeline and influence of sea waves and currents, a perpendicular nonli......
In this article, the current railway box girder bridge erecting machines at home and abroad are briefly introduced and ......
By utilizing the current finite element program ANSYS, two types of finite element models (FEM), the beam model (BM) and......
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1 Introduction Themidspanspectralinversionemployingfourwavemixinginasemiconductorlasemplifier (SLA) isoneoft......
众所周知,由于SO_4~(2-)的亲水性质,因而它很难被有机溶剂萃取。作者发现,水中的SO_4~(2-)与结晶紫(氯化物)生成的离子对,在非离......
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随着地球化学找矿的发展,要求准确、快速地测定地球化学样品中的指示元素,成为日益迫切的任务。为适应这种需要,目前国内已开始应......
Moving vehicle loads, associated with roadway traffic can induce significant dynamic effects on the structural behaviour......
本文运用高速凝胶色谱和界面张力方法较为系统地研究了由本单位研制和生产的使用效果优良的表面活性剂LMS—2的分子量及其分布、界......
Calculation of Maximum Allowable Free Span Length and Safety Assessment of the DF1-1 Submarine Pipel
The DF1-1 submarine pipeline was investigated using a dual-frequency side-scan sonar and a swath sounder system.More tha......
作者采用膜分离技术,对Pb~(2+)的分离进行了研究。其实验步骤为:在500ml圆底烧瓶中加入一定量的煤油、Span80(山梨糖醇单油酸酯)......
采用反相乳液聚合技术合成了铁 /聚丙烯酸锂复合微粒 ,将其悬浮分散于含有不同添加剂的硅油中形成电磁流变体 ,考察了添加剂的种类......
本文介绍采用多次乳化实验筛选的以Span、Tween系列为主的复配乳化剂,进行柴油掺水3%～20%乳化,减少了乳化剂用量.着重介绍选取非离......
The third bridge on the Qiantang River,the newly-constructed No.3 QiantangBridge is 1,280 meters long and 29.50 metersw......
采用乳状液膜法对硫酸盐溶液中的钴离子和镍离子进行分离研究。乳状液膜主要由溶剂(正庚烷)、表面活性剂(Span80)、载体(Cyanex272......
以Span-80——二-(2-乙基己基)-二硫化磷酸——煤油为膜相,稀HCl为内相,在高速搅拌下制成油包水型乳状液,按L16(4~3×2~6)正交表......
Wind loads are key considerations in the structural design of large-span structures since wind loads can be more importa......
An artificial neural network (ANN) is applied in the preliminary structural design of reticulated shells. Major efforts......
日本大阪大学T.Hirai用乳胶涂膜(ELM,W/O/W乳胶)体系进行Y和Pr草酸盐颗粒的制备,液膜由Span83作表面活性剂,VA-10作萃取剂(阳离子......
The seismic performances of the large-span prestressed concrete frame structure of bunker bay of thermal power plant und......
