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Chemical Research in Chinese Universities 2008年第3期24卷 362-366页

作者： CHEN Da-wei SHI Jin-e YAN Ji-chang wang Yue-hong YAN Fu-cheng SHANG Shu-xia XUE Jing College of Urban and Environmental Sciences Northeast Normal University Changchun 130024 P. R. China

Titania nanocrystals with different morphologies were prepared using the hydrothermal method via controlling the pH values of solution, the ratio of reactants, temperature, and time of the hydrothermal reaction. The experimental results showed that uniform rod-like titania particles with an average aspect ratio of 6：1 could be obtained under the conditions of pH=11, n（TBOT）：n（TEA）=1：2, hydrothermal treatment at 150 °C for 24 h. When pH〈10, spherical titania nanocrystals could be obtained; with increasing the pH value, the diameter became smaller. Finally, the smallest size of the particles could reach 7 nm. Nanocrystals with uniformly well-dispersed and perfect crystallographic form were obtained via the above method. Phenol was used as the degradation model for testing the photocatalytical activity of the titania nanocrystals with different morphologies.

关键词： TiO2 Hydrothermal synthesis Nanoparticle Anatase Phenol degradation

Study of the reaction mechanism for preparing powdered activated coke with SO_(2)adsorption capability via one-step rapid activation method under flue gas atmosphere

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Chinese Journal of Chemical Engineering 2024年第1期65卷 158-168页

作者： Binxuan Zhou Jingcai chang Jun Li Jinglan hong Tao wang Liqiang Zhang Ping Zhou Chunyuan Ma School of Environmental Science and Engineering Shandong UniversityQingdao 266237China School of Energy and Power Engineering Shandong UniversityJinan 250061China Weihai Research Institute of Industrial Technology of Shandong University Weihai 264209China

In this study,the impact of different reaction times on the preparation of powdered activated carbon(PAC)using a one-step rapid activation method under flue gas atmosphere is investigated,and the underlying reaction mechanism is *** indicate that the reaction process of this method can be divided into three stages:stage I is the rapid release of volatiles and the rapid consumption of O_(2),primarily occurring within a reaction time range of 0-0.5 s;stage II is mainly the continuous release and diffusion of volatiles,which is the carbonization and activation coupling reaction stage,and the carbonization process is the main in this *** stage mainly occurs at the reaction time range of 0.5 -2.0 s when SL-coal is used as material,and that is 0.5-3.0 s when JJ-coal is used as material;stage III is mainly the activation stage,during which activated components diffuse to both the surface and interior of *** stage mainly involves the reaction stage of CO_(2)and H2O(g)activation,and it mainly occurs at the reaction time range of 2.0-4.0 s when SL-coal is used as material,and that is 3.0-4.0 s when JJ-coal is used as ***,the main function of the first two stages is to provide more diffusion channels and contact surfaces/activation sites for the diffusion and activation of the activated components in the third *** the reaction mechanism would serve as a crucial reference and foundation for designing the structure,size of the reactor,and optimal positioning of the activator nozzle in PAC preparation.

关键词： Reaction mechanism Powdered activated coke preparation SO_(2)adsorption One-step rapid activation Flue gas atmosphere

Efficient electroreduction of nitrate via enriched active phases on copper-cobalt oxides

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Chinese Chemical Letters 2024年第4期35卷 204-209页

作者： Ling Fang Sha wang Shun Lu Fengjun Yin Yujie Dai Lin chang hong Liu Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 400714China University of Chinese Academy of Sciences Beijing 100049China

Electrochemical conversion of nitrate(NO_(3)~-) to ammonia(NH_(3)) can target two birds with one stone well, in NO_(3)^(-)-containing sewage remediation and sustainable NH_(3) production. However, single metalbased catalysts are difficult to drive high-efficient NO_(3)~- removal due to the multi-electron transfer ***, we present a tandem catalyst with simple structure, Cu-Co binary metal oxides(Cu-Co-O), by engineering intermediate phases as catalytic active species for NO_(3)~- conversion. Electrochemical evaluation,X-ray photoelectron spectroscopy, and in situ Raman spectra together suggest that the newly-generated Cu-based phases was prone to NO_(3)~- to NO_(2)~- conversion, then NO_(2)~- was reduced to NH_(3) on Co-based species. At an applied potential of -1.1 V vs. saturated calomel electrode, the Cu-Co-O catalyst achieved NO_(3)~- -N removal of 90% and NH_(3) faradaic efficiency of 81% for 120 min in 100 m L of 50 mg/L NO_(3)~- -N,consuming only 0.69 k Wh/mol in a two-electrode system. This study provides a facile and efficient engineering strategy for developing high-performance catalysts for electrocatalytic nitrate conversion.

关键词： NO_(3)^(-)-containing sewage remediation Electrocatalytic reduction Copper-cobalt oxides Tandem reactivity Enriched active phases

CNV-seq联合核型分析在扩展性NIPT结果异常孕妇产前诊断中的临床应用

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中国妇幼保健 2024年第3期39卷 404-408页

作者：王常宏梅莉李宏栾珊珊卢佳丽王培闻柳韩雪李小娜张宁芝宛杨阜阳市人民医院产前诊断中心安徽阜阳236000

目的探索在扩展性非侵入性产前检测(NIPT-plus)筛查结果异常孕妇中应用拷贝数变异测序(CNV-seq)技术联合染色体核型分析进行产前诊断的临床价值。方法收集2021年1月—2022年12月因NIPT-plus结果异常至阜阳市人民医院产前诊断中心自愿... 详细信息

目的探索在扩展性非侵入性产前检测(NIPT-plus)筛查结果异常孕妇中应用拷贝数变异测序(CNV-seq)技术联合染色体核型分析进行产前诊断的临床价值。方法收集2021年1月—2022年12月因NIPT-plus结果异常至阜阳市人民医院产前诊断中心自愿接受羊膜腔穿刺术并选择进行羊水核型联合CNV-seq检测的孕妇233例,统计病例产前诊断结果,并对所有病例进行随访。结果 233例羊水样本中检出86例核型异常,其中非整倍体66例、染色体结构异常9例、嵌合体13例,其中2例同时存在结构异常和嵌合。CNV-seq检出胎儿染色非整倍体同核型结果一致,12例嵌合体核型和CNV-seq均检出。1例平衡易位嵌合体CNV未检出,1例XO嵌合及1例T15嵌合核型未检出。2例性染色体相关的复杂嵌合异常,核型提示体内存在2种异常细胞系,孕妇家庭最终决定终止妊娠。CNV-seq技术在未检出非整倍体异常及嵌合体病例中检出致病及可能致病性拷贝数变异(pCNVs)13例,检出231处意义未明(VUS)的CNVs,共报告21处,占9.1%(21/231)。核型检出结构畸形病例中,有3例CNV-seq结果未见异常,孕妇及家属均决定继续妊娠;13例CNV-seq检出pCNVs的病例中,有11例核型未检出异常,占84.6%(11/13)。结论 CNV-seq技术联合核型分析在NIPT-plus结果异常孕妇中可提供更精确的产前诊断结果,但在选择前应仔细产前咨询,告知孕妇家属此技术的局限性。

关键词：拷贝数变异测序核型分析扩展性非侵入性产前检测产前诊断

Research of multilayers in EUV, soft X-ray and X-ray

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光学精密工程 2005年第4期13卷 512-518页

作者： wang Zhan-shan wang Feng-li ZHANG Zhong wang hong-chang WU Wen-juan ZHANG Shu-min XU Yao GU Zhong-xiang CHENG Xin-bin L1 Cun-xia WU Yong-rong wang Bei QIN Shu-jin CHEN Ling-yan Institute of Precision Optical Engineering Department of Physics Tongji University Shanghai 200092 China

To develop beam splitters for soft X-ray laser Michelson interferometer at 13.9 nm, Mo/Si multilayers of 100 nm thickness deposited on both sides of silicon nitride were fabricated by using DC magnetron sputtering. Initial evaluation of their reflectivity and transmission showed that reflectivity and transmission were above 10% and 25%. The broadband analyzers have been designed, fabricated and characterized for 13～20 nm polarization measurements. The measured results are in good agreement with the design. The supermirrors with different angular intervals at 0.154 nm have been designed, fabricated and characterized.

关键词： EUV X射线多层性激光宽带光纤

Investigation of nanometer-scale films using low angle Xray reflectivity analysis in IPOE

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Optoelectronics Letters 2007年第2期3卷 88-90页

作者： wang Zhan-shan XU Yao wang hong-chang ZHU Jing-tao ZHANG Zhong wang Feng-li CHEN Ling-yan Institute of Precision Optical Engineering Tongji University Shanghai 200092 China

The X-ray low angle reflectivity measurement is used to investigate single and bilayer films to determine the parameters of nanometer-scale structures,three effectual methods are presented by using X-ray reflectivity analysis to provide an accurate estimation of the nanometer film structures. The parameters of tungsten (W) single layer, such as the material density, interface roughness and deposition rate, were obtained easily and speedily. The base metal layer was introduced to measure the profiles of single low Z material film. A 0.3 nm chromium (Cr) film was also studied by low angle reflectivity analysis.

关键词： IPOE 纳米级薄膜 X线反射率分析多层结构参数

Analyses and Countermeasures of Current British-American Literature Course Teaching for English Major Students in China

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Sino-US English Teaching 2015年第12期12卷 953-958页

作者： wang hong-chang XU Zhong-ming Nanhu College of Jiaxing University Jiaxing China

Tremendous data and materials indicate that British-American literature course, as the compulsive course for English major students, has been overlooked by the authority of various administrative departments and students as well. The majorities of teachers and students have formed the conception of attaching more importance to skill-gaining than literature-acquisition. Furthermore, there are large quantities of questionnaires and analyses conducted by the author in this essay; meanwhile, this essay offers some countermeasures to solve the current situation of British-American literature course

关键词： British-American literature English major students analyses countermeasures

HPLC Fingerprint with Multi-components Analysis for Quality Consistency Evaluation of Traditional Chinese Medicine Si-Mo-Tang Oral Liquid Preparation

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Chemical Research in Chinese Universities 2011年第5期27卷 756-763页

作者： YI Yue-neng CHENG Xue-mei LIU Ling-an HU Gao-yun CAI Guang-xian DEN G Yi-de HUANG Ke-long wang chang-hong College of Chemistry ＆ Chemical Engineering Central South University Changsha 410083 P. R. China Key Laboratory of Standardization of Chinese Medicines Ministry of Education Shanghai University of Traditional Chinese Medicine Shanghai 201203 P. R. China Hunan Hansen Pharmaceutical Co. Yiyang 413000 P. R. China College of Pharmacy Central South University Changsha 410083 R R. China Laboratory of Chinese Internal Medicine Hunan University of Chinese Medicine Changsha 410007 R R. China

Si-Mo-Tang（SMT） oral liquid preparation, a traditional Chinese medicine, was prepared from four crude herbal drugs, Fructus Aurantii Submaturus, Radix Aucklandiae, Semen Arecae and Radix Linderae Aggregatae. A combinative method using HPLC fingerprint and quantitative analysis was developed and validated for quality consistency evaluation of SMT. Individual HPLC chromatograms were evaluated against the mean chromatogram generated via a similarity evaluation computer program. Data from chromatographic fingerprints were also processed with principal component analysis（PCA） and hierarchical cluster analysis（HCA）. Additionally, six components （naringin, isonaringin, hesperidin, neohesperidin, norisoboldine and potassium sorbate） in SMT were simultaneously determined to interpret the quality consistency. For fingerprint analysis, 20 peaks were selected as the characteristic peaks to evaluate the similarities of 26 SMT collected from different manufacturers. Among the 20 characteristic peaks, 10 peaks were assigned to be naringin, hesperidin, neohesperidin, isonaringin, neoeriocitrin, tangeretin, nobiletin, norisoboldine, 5-（ethoxymethyl）furan-2-carbaldehyde and potassium sorbate, respectively. The results of similarity analysis, PCA and HCA, indicate that the samples from different manufacturers were consistent with each other in composition. The results from the quantitative data show that the contents of six compounds were significantly different in SMT oral liquid preparations from different manufacturers. The combinative method of chromatographic fingerprint with quantitative analysis developed here offered an efficient way for the quality consistency evaluation of the traditional Chinese medicine SMT.

关键词： Si-Mo-Tang oral liquid preparation Quality consistency evaluation High-performance liquid chromato-graphy(HPLC) fingerprint Quantitative determination

Robust Sliding-mode Filtering for a Class of Uncertain Nonlinear Discrete-time State-delayed Systems

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自动化学报 2006年第1期32卷 96-100页

作者： WU Li-Gang wang chang-hong ZENG Qing-Shuang GAO Hui-Jun Space Control and Inertial Technology Research Center Harbin Institute of Technology Harbin 150001

This paper is concerned with the problem of robust sliding-mode filtering for a class of uncertain nonlinear discrete-time systems with time-delays. The nonlinearities are assumed to satisfy global Lipschitz conditions and parameter uncertainties are supposed to reside in a polytope. The resulting filter is of the Luenberger type with the discontinuous form. A sufficient condition with delay-dependency is proposed for existence of such a filter. And the desired filter can be found by solving a set of matrix inequalities. The resulting filter adapts for the systems whose noise input is real functional bounded and not be required to be energy bounded. A numerical example is given to illustrate the effectiveness of the proposed design method.

关键词：鲁棒控制滑动模式滤波器离散系统状态延迟线性矩阵不等式

Steel-refractory reactions in lanthanum-,cerium-,and ytrium-added steels

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Journal of Iron and Steel Research International 2024年第6期31卷 1473-1485页

作者： Jian Kang hong-po wang Yu wang College of Materials Science and Engineering Chongqing UniversityChongqing 400044China The State Key Laboratory of Mechanical Transmissions Chongqing UniversityChongqing 400044China

A systematic experimental study was conducted on the similarities and differences in the reactions between commonly used rare earth elements(REEs)and frequently used refractories in the steelmaking *** results indicate that the reaction behaviors of La,Ce,and Y with MgO,Al_(2)O_(3),and MgO·Al_(2)O_(3) crucibles differed *** consumption rates of La,Ce,and Y in the molten steel were in descending order of La>Ce>Y for smelting with all three kinds of *** the REEs reacted with the crucible,the contents of Mg and Al showed a trend of first increasing and then *** laboratory-scale smelting conditions,the reactions related to REEs were dominated by steel-crucible reactions,and the contact area between the unit mass of molten steel and refractory materials mainly determined the consumption rates of ***-and Ce-crucible reactions generated loose and porous reaction interfaces;however,Y-crucible reactions generated a dense Y_(2)O_(3) layer,dramatically suppressing the consumption rate of *** calculation indicated that the reactions between rare earth and different refractory materials were first-order *** crucible materials significantly affected the product type and morphology of the steel-crucible reaction interfaces,thereby influencing the consumption rate of *** reactions between REEs and refractories must be seriously considered,especially for small-scale smelting.

关键词： Rare earth Inclusion Refractory Thermodynamics Dynamics