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A readily monitored and controllable hydrothermal system for the facile,cost-effective transformation of FGD gypsum to calcium sulfate hemihydrate whiskers

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Particuology 2021年第1期19卷 173-180页

作者： Bolun Cao Xiao Wang Xiaoting Zhang Biao Jin Zhuoyue Xu xueping liu Wei Zhang liushuan Yang College of Materials Science and Engineering Zhengzhou UniversityZhengzhou 410001China School of Materials and Chemical Engineering Henan University of Urban ConstructionPingdingshan 467036China Zhengzhou Key Laboratory of Water Resource and Environment Zhengzhou450001China

The controllable transformation of flue gas desulfurization(FGD)gypsum to calcium sulfate hemihydrate(HH)whiskers under facile,readily monitored,and cost-effective hydrothermal conditions could play a vital role in the preparation of high quality HH whiskers and improve our understanding of the transformation *** work assessed the conversion of FGD gypsum to HH whiskers in 5×10^(-4)mol/L H_(2)SO_(4)and 1.5 wt%CuCl_(2)at 120℃while determining the effects of temperature as well as H_(2)SO_(4)and CuCl_(2)concentrations on transformation *** preparation of HH whiskers was found to involve a solution-mediated transformation from the dihydrate(DH)to theα-*** transition was determined to proceed via a dissolution crystallization mechanism,the rate of which was controlled by nucleation and growth of the HH *** autocatalytic kinetic model was established based on variations in the HH whiskers mole fraction over time,and this model accurately fit the experimental data with R2=*** the temperature or H_(2)SO_(4)concentration accelerated the transformation by modifying the super-saturation and water activity in the reaction solution,while increasing the CuCl_(2)concentration had the opposite *** hydrothermal conditions had an important effect on the transformation from FGD gypsum to HH whiskers.

关键词： FGD gypsum Whisker Hydrothermal condition Transformation process Kinetic

A Novel Method for the Quantitative Detection of Sericin Content in Silk Fiber Based on the Ratio of Aspartate to Alanine

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Journal of Renewable Materials 2023年第1期11卷 167-184页

作者： Yanfei Feng Jiaming Lin Longxing Niu Peng Pan xueping liu Linling Huang Ying Guo Mingzhong Li National Engineering Laboratory for Modern Silk College of Textile and Clothing EngineeringSoochow UniversitySuzhou215123China

The development of a method for the quantitative determination of the sericin content ratio(SCR)is urgently needed for silk refining and the purification of silk fibroin for biomedical *** this work,a series of sericin/fibroin mixed samples with known SCRs were prepared by mixing initial samples of extracted sericin and fibroin from Bombyx mori *** differences were found in the contents of characteristic hydrophilic amino acids abundant in sericin and hydrophobic amino acids abundant in fibroin,and several linear relation-ships of SCR associated with the content ratios of Ser/Ala,Asp/Ala,Lys/Ala,Asp/Gly and Ser/Gly were estab-lished by amino acid ***,the linear equation expressing SCR(%)as a function of the Asp to Ala content ratio X(%)was established as SCR=2.5634X−12.5587(R 2=0.9972).The results indicated that the SCR of degummed silks calculated by the equation is more objective and effective than the results obtained by the traditional weight loss *** study provides a novel approach for the sensitive and quantitative detection of the sericin content within the detection limit in unknown silks,which can contribute to quality control in the silk production process.

关键词： Silk sericin content amino acid analysis

The research of load spectrum between flexible gear and wave generator of harmonic drive

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Computer Aided Drafting,Design and Manufacturing 2016年第3期26卷 9-16页

作者： Wang Yake liu xueping Department of Advanced Manufacturing Graduate School at ShenzhenTsinghua University

The harmonic drive is a kind of gear transmission that uses wave generator to produce controllable soft round elastic deformation and engages with rigid gear to transmit motion and power. The load distribution on the surface of the flexible gear and wave generator is an important parameter of studying the deformation of flexible gear and flexible bearing outside the wave generator and is also a necessary condition for studying the fatigue damage of flexible gear under alternating load. In this paper, a 3D model of 32-type 80：1 harmonic drive is build. Based on the generalized Hooke law, a hypothesis of load distribution which is proved to be validity by using finite element simulation is proposed on the interface of flexible gear and wave generator. On this base, the mathematic model and the quantitative calculation formula of the load distribution on the surface of the flexible gear and wave generator are proposed which provide a basis for the dynamic analysis and the fatigue damage of harmonic gear drive.

关键词： harmonic drive load distribution finite element simulation mathematic model

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人格判断能力的老化:信息量的调节作用

心理学报 2025年第1期57卷 71-83页

作者：刘雪萍怀淇琛龚先旻彭华茂北京石油化工学院人文社科学院北京102617 北京师范大学发展心理研究院北京100875 香港中文大学何鸿燊海量数据决策分析研究中心中国香港999077

人格判断对个体社会功能的发挥具有重要影响。本研究采用2(判断者年龄组:老年、年轻)×3(目标人物信息量:单一、中等、丰富)被试间实验设计,考察了信息量对老年人和年轻人人格判断准确性的影响,包括普遍准确性(对目标人物所在群体人格... 详细信息

人格判断对个体社会功能的发挥具有重要影响。本研究采用2(判断者年龄组:老年、年轻)×3(目标人物信息量:单一、中等、丰富)被试间实验设计,考察了信息量对老年人和年轻人人格判断准确性的影响,包括普遍准确性(对目标人物所在群体人格共性判断的准确性)和特有准确性(对目标人物个体人格判断的准确性)。结果显示,老年人人格判断的普遍准确性高于年轻人,且信息量的多少并不影响这一年长优势。信息量只影响特有准确性判断的年龄差异:单一信息量(仅实时文字)时,老年人的特有准确性低于年轻人;中等(实时文字和声音)和丰富信息量(实时文字、声音和图像)时,二者表现相当。综上,老年人的人格判断能力总体保持较好,且能有效利用增量信息来弥补与年轻人在特有准确性上的差距。

关键词：人格判断普遍准确性特有准确性老化特点信息量

Fast and Balanced Charge Transport Enabled by Solution-Processed Metal Oxide Layers for Efficient and Stable Inverted Perovskite Solar Cells

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Energy & Environmental Materials 2024年第2期7卷 240-248页

作者： Jing Zhang James Mcgettrick Kangyu Ji Jinxin Bi Thomas Webb xueping liu Dongtao liu Aobo Ren Yuren Xiang Bowei Li Vlad Stolojan Trystan Watson Samuel D.Stranks Wei Zhang Advanced Technology Institute(ATI) University of SurreyGuildfordSurrey GU27XHUK SPECIFIC College of EngineeringSwansea UniversityBay Campus SA18ENSwansea UK Cavendish Laboratory University of CambridgeJ JThomson AvenueCambridge CB30HEUK Department of Chemical Engineering&Biotechnology University of CambridgePhilippa Fawcett DriveCambridge CB30ASUK

Metal oxide charge transport materials are preferable for realizing long-term stable and potentially low-cost perovskite solar cells(PSCs).However,due to some technical difficulties(e.g.,intricate fabrication protocols,high-temperature heating process,incompatible solvents,etc.),it is still challenging to achieve efficient and reliable all-metal-oxide-based ***,we developed efficient inverted PSCs(IPSCs)based on solution-processed nickel oxide(NiO_(x))and tin oxide(SnO_(2))nanoparticles,working as hole and electron transport materials respectively,enabling a fast and balanced charge transfer for photogenerated charge *** further understanding and optimizing the perovskite/metal oxide interfaces,we have realized an outstanding power conversion efficiency(PCE)of 23.5%(the bandgap of the perovskite is 1.62 eV),which is the highest efficiency among IPSCs based on all-metal-oxide charge transport *** to these stable metal oxides and improved interface properties,ambient stability(retaining 95%of initial PCE after 1 month),thermal stability(retaining 80%of initial PCE after 2 weeks)and light stability(retaining 90%of initial PCE after 1000 hours aging)of resultant devices are enhanced *** addition,owing to the low-temperature fabrication procedures of the entire device,we have obtained a PCE of over 21%for flexible IPSCs with enhanced operational stability.

关键词： fast and balanced charge transfer inverted perovskite solar cells long-term stability low-temperature processing metal oxides

Study on Coconut Shell Activated Carbon Temperature Swing Adsorption of Benzene and Formaldehyde

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Journal of Renewable Materials 2022年第12期10卷 3573-3585页

作者： Zhiguang Yang Gaojun Yan xueping liu Zhengyuan Feng Xinfeng Zhu Yanli Mao Songtao Chen Zhisheng Yu Ruimei Fan Linlin Shan Henan Province Key Laboratory of Water Pollution Control and Rehabilitation Technology Henan University of Urban ConstructionPingdingshan467036China College of Resources and Environment University of Chinese Academy of SciencesBeijing100085China College of Basic Medical Sciences Xinxiang Medical UniversityXinxiang 453003China

Adsorption can be used to recover effectively the volatile organic gases(VOCs)in the exhaust gas from factories through using an appropriate adsorption *** to form a physical or chemical bond,adsorption occurs between the porous solid medium and the liquid or gas multi component fluid *** regeneration capa-city of the adsorbent is as important as the adsorption capacity and it determines the economics of the adsorption *** regeneration of adsorbent can be realized through changing the pressure or temperature of the ***,activated carbon samples from coconut shell were prepared and *** or formal-dehyde in the mixed air was used as the adsorption object,and the adsorption experiment was carried out in a U-shaped *** how adsorption was affected by activated carbon type,adsorbate and *** results show that oxidation modifed activated carbon can increase the adsorption effect of form aldehyde,but will reduce the ad sorption effect of benzene,because their ad sorption mechanism is *** 30℃,the saturated adsorption apacity of AC-0 for benzene is 437.0 mg/*** that of AC-1 for formaldehyde is 670.5 mg/*** the experimental range,it is found that the adsorption capacity increases with the decrease of temperature,and their changes are very consistent with the ftted ExpDecay1 function.

关键词： Activated carbon adsorption benzene formaldehyde oxidation modification

Free fatty acid receptor 2 promotes cardiomyocyte hypertrophy by activating STAT3 and GATA4

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Food Science and Human Wellness 2022年第2期11卷 405-417页

作者： Hui Gao Kunming Tian Xiaojun Feng Mengqing Yan Chen Gao Yisheng Jiang Chenhao Zhu Huzhe Zhu xueping liu Yingfu Peng Department of Pharmacology School of MedicineShaoxing UniversityShaoxing 312000China Department of Pharmacology School of MedicineJishou UniversityJishou 416000China Department of Environmental Toxicity Zunyi Medical UniversityZunyi 563006China The First Affi liated Hospital of USTC Division of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei 230002China Department of Pharmacology School of MedicineGuangXi University of science and TechnologyLiuzhou 545006China

Free fatty acids(FFAs)play important roles in cardiovascular *** have shown that it is an important way for FAs to exert biological effects through their own receptors besides directly participating biochemical reaction in *** fatty acid receptor 2(FFA2)can be activated by short-chain FAs and is involved in inflammatory reactions and lipid *** the known pathological changes caused by FFA2 are also implicated in cardiac hypertrophy,we hypothesized that FFA2 might be pathogenic in cardiac *** paper showed that FFA2 expression significantly increased in cardiac hypertrophy in vivo and in ***2 agonist 4-CMTB or TUG-1375 promoted the expression of the hypertrophy markers ANF and BNP and increased cell surface area in vitro,which was further strengthened by FFA2 overexpression,suggesting that FFA2 might contribute to cardiomyocyte ***,4-CMTB treatment or FFA2 overexpression combined with 4-CMTB treatment elevated the phosphorylation and transcriptional activity of GATA4 and STAT3,which were inhibited by an ERK1/2 inhibitor,and GATA4 and STAT3 knockdown inhibited the elevation of hypertrophy biomarkers in cardiomyocytes treated with *** together,these data indicate that FFA2 can enhance cardiomyocyte hypertrophy by activating STAT3 and GATA4 via ERK1/2,providing a potential new target for therapy.

关键词： FFA2 Cardiac hypertrophy GATA4 STAT3 ERK1/2

Arsenic(Ⅲ) removal from water with modified char by chitin pyrolysis

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Arsenic(Ⅲ) removal from water with modified char by chitin ...

Pricing European Options Based on a Logarithmic Truncated t-Distribution

河南省化学会2016年学术年会

作者： Yang Zhiguang liu xueping Department of Municipal and Environmental Engineering Henan University of Urban Construction

Arsenic has harmful effects on humans,plants and *** of arsenic contamination in groundwater have been reported from all over the *** of adsorbents for removal of arsenic has drawn attention due to higher adsorption c...

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Journal of Applied Mathematics and Physics 2023年第5期11卷 1349-1358页

作者： Yingying Cao xueping liu Yiqian Zhao Xuege Han School of Mathematics and Information Science Henan Polytechnic University Jiaozuo China

The t-distribution has a “fat tail” feature, which is more suitable than the normal probability density function to describe the distribution characteristics of return on assets. The difficulty of using t-distribution to price European options is that a fat tail can lead to a deviation in one integral required for option pricing. We use a distribution called logarithmic truncated t-distribution to price European options. A risk neutral valuation method was used to obtain a European option pricing model with logarithmic truncated t-distribution.

关键词： Option Pricing Logarithmic Truncated t-Distribution Asset Returns Risk-Neutral Valuation Approach