资源类型

期刊论文 11

年份

2023 2

2019 1

2017 2

2016 1

2012 1

2009 2

2006 1

2000 1

展开 ︾

关键词

大豆加工 1

大豆复合功能因子 1

建材 1

建筑卫生陶瓷用黏土矿原料(高岭土) 1

强国战略 1

总有机碳 1

水泥灰岩 1

溶解氧 1

玻璃用硅质原料 1

石墨 1

细菌 1

超大规模集成电路 1

轨道角动量;涡旋波束;透射阵;宽带;高纯度 1

高纯度大豆低聚肽 1

高纯度大豆异黄酮 1

高纯水 1

高纯石英 1

高纯金属;溅射靶材;集成电路;薄膜;金属化 1

展开 ︾

检索范围:

排序: 展示方式:

Sulfate digestion process for high purity TiO

T. A. LASHEEN

《化学科学与工程前沿(英文)》 2009年 第3卷 第2期   页码 155-160 doi: 10.1007/s11705-009-0005-z

摘要: A titania slag product of Rosetta ilmenite assaying 72% TiO is treated by the sulfate process option of the pigmentary TiO manufacture. The relevant factors of acid concentration, particle size, slag/acid ratio besides the reaction temperature, and time have been studied. After dissolving the cured mass in dilute acid and clarification, the obtained solution was subjected to hydrolysis of its titanium content. The final product was bleached under reducing conditions to redissolve the residual coloring impurities before being dewatered and calcinated. The obtained results indicated that a leaching efficiency of about 92% was realized due to the presence of some refractory components in the working slag material, namely, rutile and magnesium iron titanate. The obtained white pigment assay attained up to 99.85% TiO , while the analyzed impurities involve 77 ppm Mn and only 14 and 7 ppm of total iron and V, respectively.

关键词: titania     slag     sulfate process     pigment    

自主创新振兴中国大豆加工业

李荣和,姜浩奎

《中国工程科学》 2006年 第8卷 第10期   页码 80-84

摘要:

介绍了以我国大豆加工业的最大领域——油脂工业生成的、通常能用作饲料的高温豆粕为原料,提取高纯度大豆低聚肽(蛋白含量≥93%~95%、NSI值=100%、溶解度=100%,灰分≤1.5%)、高纯度大豆异黄酮(异黄酮总含量≥92%、G∶D≥8∶1)和大豆复合功能因子自主创新高技术;对我国大豆油脂加工业扭亏为盈,拉动豆农致富,对原料大豆“吃干榨净",实现资源节约型的大豆加工工业具有重要的指导意义和促进作用。

关键词: 大豆加工     高纯度大豆低聚肽     高纯度大豆异黄酮     大豆复合功能因子    

High purity Mn

Xiaoqiang SHAN, Fenghua GUO, Wenqian XU, Xiaowei TENG

《能源前沿(英文)》 2017年 第11卷 第3期   页码 383-400 doi: 10.1007/s11708-017-0485-3

摘要: Developing electrodes with high specific energy by using inexpensive manganese oxides is of great importance for aqueous electrochemical energy storage (EES) using non-Li charge carriers such as Na-or K-ions. However, the energy density of aqueous EES devices is generally limited by their narrow thermodynamic potential window (~1.23 V). In this paper, the synthesis of high purity layered Mn O nanoparticles through solid state thermal treatment of Mn O spinel nanoparticles, resulting in a chemical formula of [Mn ][Mn O ], evidenced by Rietveld refinement of synchrotron-based X-ray diffraction, has been reported. The electro-kinetic analyses obtained from cyclic voltammetry measurements in half-cells have demonstrated that Mn O electrode has a large overpotential (~ 0.6 V) towards gas evolution reactions, resulting in a stable potential window of 2.5 V in an aqueous electrolyte in half-cell measurements. Symmetric full-cells fabricated using Mn O electrodes can be operated within a stable 3.0 V potential window for 5000 galvanostatic cycles, exhibiting a stable electrode capacity of about 103 mAh/g at a C-rate of 95 with nearly 100% coulombic efficiency and 96% energy efficiency.

关键词: manganese oxides Mn5O8     high voltage     aqueous Na-ion storage    

Isolation of highly purity cellulose from wheat straw using a modified aqueous biphasic system

Lifeng YAN, Yi ZHAO, Qing GU, Wan LI

《化学科学与工程前沿(英文)》 2012年 第6卷 第3期   页码 282-291 doi: 10.1007/s11705-012-0901-5

摘要: Cellulose samples with molecular weights ranging from 8.39 × 10 to 11.00 × 10 g/mol were obtained from wheat straw. The dewaxed wheat straw was pretreated with aqueous hydrochloric acid followed by delignification using an environmentally benign poly(ethyleneglycol)/salt aqueous biphasic system. The yield of cellulose was in the range of 48.9%–55.5% and the cellulose contained 1.2%–3.2% hemicelluloses, and 0.97%–3.47% lignin. All the isolated cellulose samples could be directly dissolved in a 6 wt-% NaOH/4 wt-% urea aqueous solution through a precooling-thawing process to form a homogenous solution. The separation process was investigated and the obtained cellulose and its solution were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy and energy dispersive X-ray apparatus, and X-ray diffraction. The results revealed that aqueous soluble cellulose can be directly prepared from wheat straw by this method and this study opens a novel pathway to prepare cellulosic materials from agricultural waste.

关键词: cellulose     straw     separation     aqueous solution    

现代高纯水

闻瑞梅

《中国工程科学》 2000年 第2卷 第1期   页码 68-72

摘要:

论述了超大规模集成电路与高纯水的关系以及对水质的要求;研究了高纯水制备的几个关键新技术及提高高纯水质量的方法,该方法能有效地降低高纯水中的总有机碳、细菌、细菌内毒素、溶解氧等;讨论了高纯水常用各种管材的污染,并列举了大量数据和应用实例。

关键词: 高纯水     超大规模集成电路     总有机碳     细菌     溶解氧    

集成电路用高纯金属溅射靶材发展研究

何金江 ,吕保国 ,贾倩,丁照崇 ,刘书芹 ,罗俊锋 ,王兴权

《中国工程科学》 2023年 第25卷 第1期   页码 79-87 doi: 10.15302/J-SSCAE-2023.01.003

摘要: His major research field is high-purity metal targets for integrated circuits.

关键词: 高纯金属;溅射靶材;集成电路;薄膜;金属化    

The energy consumption in a batch stripper and a batch rectifier

Xianbao CUI, Tianyang FENG, Ying ZHANG, Zhicai YANG,

《化学科学与工程前沿(英文)》 2009年 第3卷 第4期   页码 443-452 doi: 10.1007/s11705-009-0266-6

摘要: The energy consumption in a batch rectifier and a batch stripper was investigated with a shortcut mathematical model. The minimum energy consumption of a batch stripper was compared to that of a batch rectifier under “general constant reflux” and “general constant distillate composition” with the ratio of minimum energy consumption /. When the feed contains a large amount of light component, the product purity specification is low and the relative volatility is small, the minimum energy consumption of a batch stripper is less than that of a batch rectifier under “general constant reflux” and “general constant distillate composition”. When the feed contains a small amount of light component, the product purity specification is very high and the relative volatility is low, a batch stripper can also consume less energy only in the “general constant distillate composition” operation mode. In other cases, a batch rectifier can consume less energy.

关键词: constant reflux     feed     energy consumption     general constant     product purity    

Copper recovery from waste printed circuit boards concentrated metal scraps by electrolysis

Xiaonan Liu, Qiuxia Tan, Yungui Li, Zhonghui Xu, Mengjun Chen

《环境科学与工程前沿(英文)》 2017年 第11卷 第5期 doi: 10.1007/s11783-017-0997-4

摘要: Copper recovery is the core of waste printed circuit boards (WPCBs) treatment. In this study, we proposed a feasible and efficient way to recover copper from WPCBs concentrated metal scraps by direct electrolysis and factors that affect copper recovery rate and purity, mainly CuSO ·5H O concentration, NaCl concentration, H SO concentration and current density, were discussed in detail. The results indicated that copper recovery rate increased first with the increase of CuSO ·5H O NaCl, H SO and current density and then decreased with further increasing these conditions. NaCl, H SO and current density also showed a similar impact on copper purity, which also increased first and then decreased. Copper purity increased with the increase of CuSO ·5H O. When the concentration of CuSO ·5H O, NaCl and H SO was respectively 90, 40 and 118 g/L and current density was 80 mA/cm , copper recovery rate and purity was up to 97.32% and 99.86%, respectively. Thus, electrolysis proposes a feasible and prospective approach for waste printed circuit boards recycle, even for e-waste, though more researches are needed for industrial application.

关键词: Waste printed circuit boards (WPCBs)     Copper     Recovery rate     Purity     Electrolysis    

Fast implementation of kernel simplex volume analysis based on modified Cholesky factorization for endmember extraction

Jing LI,Xiao-run LI,Li-jiao WANG,Liao-ying ZHAO

《信息与电子工程前沿(英文)》 2016年 第17卷 第3期   页码 250-257 doi: 10.1631/FITEE.1500244

摘要: Endmember extraction is a key step in the hyperspectral image analysis process. The kernel new simplex growing algorithm (KNSGA), recently developed as a nonlinear alternative to the simplex growing algorithm (SGA), has proven a promising endmember extraction technique. However, KNSGA still suffers from two issues limiting its application. First, its random initialization leads to inconsistency in final results; second, excessive computation is caused by the iterations of a simplex volume calculation. To solve the first issue, the spatial pixel purity index (SPPI) method is used in this study to extract the first endmember, eliminating the initialization dependence. A novel approach tackles the second issue by initially using a modified Cholesky factorization to decompose the volume matrix into triangular matrices, in order to avoid directly computing the determinant tautologically in the simplex volume formula. Theoretical analysis and experiments on both simulated and real spectral data demonstrate that the proposed algorithm significantly reduces computational complexity, and runs faster than the original algorithm.

关键词: Endmember extraction     Modified Cholesky factorization     Spatial pixel purity index (SPPI)     New simplex growing algorithm (NSGA)     Kernel new simplex growing algorithm (KNSGA)    

用以产生高纯度涡旋波束的宽带圆极化透射阵 Correspondence

邱靓婕1,2,3,4,李秀萍1,2,3,4,齐紫航1,2,3,4,赵文禹1,2,3,4,黄雨菡5

《信息与电子工程前沿(英文)》 2023年 第24卷 第6期   页码 927-934 doi: 10.1631/FITEE.2200539

摘要: 本文提出一款在Ka波段产生高纯度涡旋波束的宽带圆极化透射阵。为简化设计,所提出的透射单元由两个相同的组合构成,并用空气层将其隔开。亚波长结构以及双谐振特性确保了透射单元在28.4%的1-dB透射带宽内具有稳定的相移能力。基于此,加工测试了一款由喇叭天线馈电的方形口径透射阵。得益于蜂窝状布阵方式,所设计的透射阵可在28.5 GHz到38 GHz的宽带范围中辐射l=–1且模态纯度高于0.93的涡旋波束。测试的峰值增益为22.3 dBic,3-dB轴比带宽为27.6%。测试结果表明,本文提出的透射阵有潜力应用于高容量无线通信和高质量雷达成像方面。

关键词: 轨道角动量;涡旋波束;透射阵;宽带;高纯度    

建材非金属矿产资源强国战略研究

顾真安,同继锋,崔源声,彭寿,苏桂军,周洪锦,冯惠敏,赵飞,田桂萍,孟庆洁,洪伟

《中国工程科学》 2019年 第21卷 第1期   页码 104-112 doi: 10.15302/J-SSCAE-2019.01.015

摘要:

本文研究我国主要建材产品生产所用的水泥灰岩、玻璃用硅质原料、建筑卫生陶瓷用黏土矿原料(高岭土)、高纯石英和石墨五种非金属矿产资源的强国建设战略,确定建材非金属矿产资源发展的战略思路与目标,指出加强矿区规划与保护、建设供应示范基地和标准原料基地、加快推进战略性资源储备制度等重点任务,提出设立矿产资源强国建设领导小组、完善矿产资源原料产品标准体系建设、加强人才培养体系建设、加强矿产资源法律法规制定与实施等保障措施。

关键词: 建材     强国战略     水泥灰岩     玻璃用硅质原料     建筑卫生陶瓷用黏土矿原料(高岭土)     高纯石英     石墨    

标题 作者 时间 类型 操作

Sulfate digestion process for high purity TiO

T. A. LASHEEN

期刊论文

自主创新振兴中国大豆加工业

李荣和,姜浩奎

期刊论文

High purity Mn

Xiaoqiang SHAN, Fenghua GUO, Wenqian XU, Xiaowei TENG

期刊论文

Isolation of highly purity cellulose from wheat straw using a modified aqueous biphasic system

Lifeng YAN, Yi ZHAO, Qing GU, Wan LI

期刊论文

现代高纯水

闻瑞梅

期刊论文

集成电路用高纯金属溅射靶材发展研究

何金江 ,吕保国 ,贾倩,丁照崇 ,刘书芹 ,罗俊锋 ,王兴权

期刊论文

The energy consumption in a batch stripper and a batch rectifier

Xianbao CUI, Tianyang FENG, Ying ZHANG, Zhicai YANG,

期刊论文

Copper recovery from waste printed circuit boards concentrated metal scraps by electrolysis

Xiaonan Liu, Qiuxia Tan, Yungui Li, Zhonghui Xu, Mengjun Chen

期刊论文

Fast implementation of kernel simplex volume analysis based on modified Cholesky factorization for endmember extraction

Jing LI,Xiao-run LI,Li-jiao WANG,Liao-ying ZHAO

期刊论文

用以产生高纯度涡旋波束的宽带圆极化透射阵

邱靓婕1,2,3,4,李秀萍1,2,3,4,齐紫航1,2,3,4,赵文禹1,2,3,4,黄雨菡5

期刊论文

建材非金属矿产资源强国战略研究

顾真安,同继锋,崔源声,彭寿,苏桂军,周洪锦,冯惠敏,赵飞,田桂萍,孟庆洁,洪伟

期刊论文