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Fabrication of Through Micro-hole Arrays in Silicon Using Femtosecond Laser Irradiation and Selective Chemical Etching 被引量:2
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作者 高博 陈涛 +2 位作者 陈颖 司金海 侯洵 《Chinese Physics Letters》 SCIE CAS CSCD 2015年第10期142-145,共4页
We demonstrate a method of fabricating through micro-holes and micro-hole arrays in silicon using femtosecond laser irradiation and selective chemical etching. The micro-hole formation mechanism is identified as the c... We demonstrate a method of fabricating through micro-holes and micro-hole arrays in silicon using femtosecond laser irradiation and selective chemical etching. The micro-hole formation mechanism is identified as the chemical reaction of the femtosecond laser-induced structure change zone and hydrofluoric acid solution. The morphologies of the through micro-holes and micro-hole arrays are characterized by using scanning electronic microscopy, The effects of the pulse number on the depth and diameter of the holes are investigated. Honeycomb arrays of through micro-holes fabricated at different laser powers and pulse numbers are demonstrated. 展开更多
关键词 Fabrication of Through Micro-hole Arrays in Silicon Using Femtosecond Laser Irradiation and selective Chemical Etching Figure
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DETERMINATION OF SERUM ALBUMIN USING A SILVER ION SELECTIVE ELECTRODE
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作者 Feng Lian LU (Department of Chemistry, Zhengzhou University, Zhengzhou, 450052) 《Chinese Chemical Letters》 SCIE CAS CSCD 1994年第10期879-880,共2页
In this paper is reported a new method of determining serum albumin with potentiometry. The silver ion selective electrode was used as working electrode and S. C. E as reference electrode. By controlling the ionic s... In this paper is reported a new method of determining serum albumin with potentiometry. The silver ion selective electrode was used as working electrode and S. C. E as reference electrode. By controlling the ionic strength, PH and temperature constant, a good linear relationship was obtained between the cell potential and albumin concentration. This method .possessed characters-of operating simplicity, rapidity and directness. The samples could be detected directly and the results were in accordance with the values detected by classic K method. 展开更多
关键词 ION DETERMINATION OF SERUM ALBUMIN USING A SILVER ION selective ELECTRODE
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森林优化特征选择算法的增强与扩展 被引量:9
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作者 刘兆赓 李占山 +2 位作者 王丽 王涛 于海鸿 《软件学报》 EI CSCD 北大核心 2020年第5期1511-1524,共14页
特征选择作为一种重要的数据预处理方法,不但能解决维数灾难问题,还能提高算法的泛化能力.各种各样的方法已被应用于解决特征选择问题,其中,基于演化计算的特征选择算法近年来获得了更多的关注并取得了一些成功.近期研究结果表明,森林... 特征选择作为一种重要的数据预处理方法,不但能解决维数灾难问题,还能提高算法的泛化能力.各种各样的方法已被应用于解决特征选择问题,其中,基于演化计算的特征选择算法近年来获得了更多的关注并取得了一些成功.近期研究结果表明,森林优化特征选择算法具有更好的分类性能及维度缩减能力.然而,初始化阶段的随机性、全局播种阶段的人为参数设定,影响了该算法的准确率和维度缩减能力;同时,算法本身存在着高维数据处理能力不足的本质缺陷.从信息增益率的角度给出了一种初始化策略,在全局播种阶段,借用模拟退火控温函数的思想自动生成参数,并结合维度缩减率给出了适应度函数;同时,针对形成的优质森林采取贪心算法,形成一种特征选择算法EFSFOA(enhanced feature selection using forest optimization algorithm).此外,在面对高维数据的处理时,采用集成特征选择的方案形成了一个适用于EFSFOA的集成特征选择框架,使其能够有效处理高维数据特征选择问题.通过设计对比实验,验证了EFSFOA与FSFOA相比在分类准确率和维度缩减率上均有明显的提高,高维数据处理能力更是提高到了100 000维.将EFSFOA与近年来提出的比较高效的基于演化计算的特征选择方法进行对比,EFSFOA仍具有很强的竞争力. 展开更多
关键词 enhanced feature selection using forest optimization algorithm(EFSFOA) 高维 特征选择 演化计算
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4 × 25 GHz uni-traveling carrier photodiode arrays monolithic with In P-based AWG demultiplexers using the selective area growth technique
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作者 叶焓 韩勤 +5 位作者 吕倩倩 潘盼 安俊明 杨晓红 王玉冰 刘荣瑞 《Chinese Optics Letters》 SCIE EI CAS CSCD 2017年第8期90-94,共5页
InP-based photonics integration is becoming a competi- tive candidate for realizing optical modules with enhanced functionality at a reduced cost, especially in optical com- munication systems, since the proposal of w... InP-based photonics integration is becoming a competi- tive candidate for realizing optical modules with enhanced functionality at a reduced cost, especially in optical com- munication systems, since the proposal of wavelength division multiplexing (WDM). In recent years, network traffic has raised demands for high capacity, high speed transmission systems. 展开更多
关键词 AWG In GHz uni-traveling carrier photodiode arrays monolithic with In P-based AWG demultiplexers using the selective area growth techni area
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FAST STEPWISE PROCEDURES OF SELECTION OF VARIABLES BY USING AIC AND BIC CRITERIA BIC CRITERIA 被引量:1
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作者 安鸿志 顾岚 《Acta Mathematicae Applicatae Sinica》 SCIE CSCD 1989年第1期60-67,共8页
Fast stepwise procedures of selection of variables by using AIC and BIC criteria are proposed inthis paper. We shall use a short name 'FSP' for these new procedures. FSP are similar to the well-known stepwise ... Fast stepwise procedures of selection of variables by using AIC and BIC criteria are proposed inthis paper. We shall use a short name 'FSP' for these new procedures. FSP are similar to the well-known stepwise regression procedures in computing steps. But FSP have two advantages. One of theseadvantages is that FSP are definitely convergent with a faster rate in finite computing steps. Anotheradvantage is that ESP can be used for large number of candidate variables. In this paper we alsoshow some asymptotic properties of FSP, and some simulation results. 展开更多
关键词 AIO BIC FSP FAST STEPWISE PROCEDURES OF SELECTION OF VARIABLES BY USING AIC AND BIC CRITERIA BIC CRITERIA AIC
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Optimization of multicomponent solvent selection in high-performance liquid chromatography using a statistical method 被引量:1
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作者 WANG,Qin-Sun GAO,Ru-Yu WANG,Heng-Yan YAN,Bing-Wen National Laboratory of Elemento-Organic Chemistry,Nankai University,Tianjin 300071 《Chinese Journal of Chemistry》 SCIE CAS CSCD 1991年第3期222-230,共0页
A computer-assisted method is presented for optimization of multicomponent solvent mobile phase selection for separation of O-ethyl-N-isopropyl phosphoro(thioureido)thioates in reversed-phase HPLC and four geometric i... A computer-assisted method is presented for optimization of multicomponent solvent mobile phase selection for separation of O-ethyl-N-isopropyl phosphoro(thioureido)thioates in reversed-phase HPLC and four geometric isomers of pesticides Decis in normal-phase HPLC.The method is based on Snyder's solvent selection triangle concept using a statistical method.The optimization of the separation over the experimental region is based on a special polynomial esti- mation from seven experimental runs,and resolution(R_s)is used as the selection criterion.Excellent agreement was obtained between predicted data and experimental results. 展开更多
关键词 Optimization of multicomponent solvent selection in high-performance liquid chromatography using a statistical method HIGH
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Optimization of two-factor(pH and ion concentration)simultaneous selection in HPLC using a statistical method
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作者 WANG,Qin-Sun GAO,Ru-Yu YAN,Bing-Wen National Laboratory of Elemento-Organic Chemistry,Nankai University,Tianjin 300071 《Chinese Journal of Chemistry》 SCIE CAS CSCD 1992年第2期143-149,共0页
A computer-assisted method is presented for simultaneous optimization of pH and ion con- centration selection for the optimal separation in reversed-phase HPLC.The method is based on a polynomial estimation from nine ... A computer-assisted method is presented for simultaneous optimization of pH and ion con- centration selection for the optimal separation in reversed-phase HPLC.The method is based on a polynomial estimation from nine preliminary experiments according to two-factor rectangular design. This is followed by a two-dimension computer scanning technique.Resolution is used as the selection criterion.Good agreement was obtained between predicted data and experimental results. 展开更多
关键词 pH and ion concentration)simultaneous selection in HPLC using a statistical method Optimization of two-factor HPLC
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