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Acta Mechanica Solida Sinica 2023年第5期36卷 724-733页

作者： xianhui wang Yaohui Chen Jiangong Yu School of Mechanical and Power Engineering Henan Polytechnic UniversityJiaozuo 454003China

As one of the popular non-classical continuum theories in functionally graded material(FGM)nanostructures,the modified nonlocal theory(MNT)has been applied in various mechanical ***,due to the difficult solution process,the original integral formulation of MNT(IMNT)is transformed into a differential formulation of MNT(DMNT),which results in an inevitable approximation *** clarify the consistency and difference between two formulations,the Lamb wave characteristics in viscoelastic FGM nanoplates are *** mathematical models are established based on the IMNT and DMNT,and solved by the proposed displacement-based and strain-based Legendre polynomial series approaches(LPSAs),*** with the available data verify the validates of the presented *** examples indicate that the results from the DMNT and IMNT are significantly different at high *** important differences are *** example,the escape frequency only appears in the results from DMNT,but not in *** addition to comparing with classical structures,more attention should be paid to the attenuation characteristics of nonlocal nanostructures.

关键词： Modiﬁed nonlocal theory Viscoelasticity Wave propagation Legendre polynomial Phase velocity Attenuation

Spherical hollow mesoporous silica supported phosphotungstic acid as a promising catalyst for α-arylstyrenes synthesis via Friedel-Crafts alkenylation

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Chinese Chemical Letters 2019年第3期30卷 729-734页

作者： xianhui wang Zhongkui Zhao State Key Laboratory of Fine Chemicals Department of Catalysis Chemistry and Engineering School of Chemical Engineering Dalian University of Technology

In this work, a spherical hollow mesoporous silica(SHMS) with high surface area(902 m^2/g) and large mesopore volume(1.31 cm^3/g) was prepared via a facile and scalable two-step soft-hard dual templateassisted sol-gel approach(OSDSG) by using glucose-derived carbon nano/micro particles(NMCP) as a hard template and cetyltrimethylammonium bromide(CTAB) as a soft template,respectively,in which the size-preselected carbon submicro-particle was used to replace ploymer sphere, and no extra precious additives like n-octadecyltrimethoxysilane(C18TMS). Supported phosphotungstic acid(PTA) catalysts on SHMS(PTA/SHMS) and on previously reported spherical mesoporous silica(PTA/SMS) with 25 wt% of PTA loading were prepared and employed as solid acid catalysts for diverse reactions. Transmission electron microscopy(TEM),N_2 adsorption-desorption, X-ray diffraction(XRD), and NH_3 temperatureprogrammed desorption(NH_3-TPD) techniques were employed to characterize the nature of carriers and supported PTA catalysts for revealing the structure-performance relationship. The developed PTA/SHMS catalyst demonstrates much higher catalytic activity than PTA/SMS for diverse reactions including alkenylation, esterification, alkylation, and benzylation, ascribed to the strengthened mass transfer and enlarged exposure degree of acidic sites to reactants those resulting from unique hollow and mesoporous morphology. Moreover, PTA/SHMS catalyst also exhibits outstanding catalytic performance for the diverse a-arylstyrenes via solid acid-mediated alkenylation. PTA/SHMS could be considered as a practical solid acid catalyst for diverse transformations.

关键词： Spherical hollow mesoporous silica Solid acid Mass transfer Alkenylation Heterogeneous catalysis

Speech perception in noise:Masking and unmasking

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Journal of Otology 2021年第2期16卷 109-119页

作者： xianhui wang Li Xu Communication Sciences and Disorders Ohio UniversityAthensOH45701USA

Speech perception is essential for daily *** noise or concurrent talkers,on the other hand,can make it challenging for listeners to track the target speech(i.e.,cocktail party problem).The present study reviews and compares existing findings on speech perception and unmasking in cocktail party listening environments in English and Mandarin *** review starts with an introduction section followed by related concepts of auditory *** next two sections review factors that release speech perception from masking in English and Mandarin Chinese,*** last section presents an overall summary of the findings with comparisons between the two *** research directions with respect to the difference in literature on the reviewed topic between the two languages are also discussed.

关键词： Speech perception Auditory masking Speech unmasking Cocktail party problems Mandarin Chinese

Relationship between powder characteristic and internal oxidation of Al in Cu-Al pre-alloyed powders

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Acta Metallurgica Sinica(English Letters) 2009年第1期22卷 71-80页

作者： Shuhua LIANG xianhui wang Liang FANG Zhikang FAN Department of Materials Science and Engineering Xi＇an University of Technology Xi＇an 710048 China State Key Laboratory for Mechanical Behavior of Materials Xi＇an Jiaotong University Xi＇an 710049 China

Since Cu-Al powder characteristics have important effects on the preparation of Cu/Al2O3 composite, the apparent activation energy of Al internal oxidation reaction in Cu-Al pre-alloyed powders with different characteristics was calculated in the present investigation. The microstructure and properties of the synthesized Cu/Al2O3 were studied. The results show that high-energy milling can obviously promote internal oxidation of Al in Cu-Al powders in the same solid solubility. At the same milling conditions and internal oxidation parameters, the solid solution of Al in Cu either in low or high amount will result in the poor microstructure and properties of the Cu/Al2O3 composite. Subsequently, when high-energy milling and internal oxidation are synchronously used to prepare the Cu/Al2O3 composite, there should be an appropriate solubility and milling effect for the pre-alloyed powders.

关键词： Powder characteristic Internal oxidation Cu/Al2O3 composite material Solid solution Reaction rate

Simulation of the neck growth of non-isometric biosphere during initial sintering

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Acta Metallurgica Sinica(English Letters) 2009年第4期22卷 263-274页

作者： Jixiang DU Shuhua LIANG xianhui wang Zhikang FAN Department of Material Science ＆ Engineering Xi＇an University of Technology Xi＇an 710048 China

Because powders are mostly non-isometric during the sintering process, copper powders were chosen to study the effects of four material transport mechanisms, including surface diffusion, grain-boundary diffusion, volume diffusion, and multi-couplings. These material transport mechanisms were studied with respect to sintering neck growth of a non-isometric biosphere during initial sintering. The evolution of the neck growth in the four transport mechanisms was simulated by Visual C＋＋ as well based on the model of different particles. The results show that the increase of the sintering temperature, both the grain-boundary diffusion and volume diffusion play primary roles in neck growth, while surface diffusion gradually becomes the secondary mechanism. Both the sintered neck and the shrinkage of the two centers increase with increasing temperature by means of the coupling diffusion mechanism. The radius of the sintering neck decreased, and the shrinkage rate of the two centers increased with an increase of the diameter ratio of the two spheres.

关键词： Sintering simulation Non-isometric biosphere model Diffusion mechanism Sintering neck

Core transcriptional signatures of phase change in the migratory locust

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Protein & Cell 2019年第12期10卷 883-901页

作者： Pengcheng Yang Li Hou xianhui wang Le Kang Beijing Institutes of Life Science Chinese Academy of SciencesBeijing 100101China State Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of ZoologyChinese Academy of SciencesBeijing 100101China

Phenotypic plasticity plays fundamental roles in successful adaptation of animals in response to environmental ***,to reveal the transcriptome reprogramming in locust phase change,a typical phenotypic plasticity,we conducted a comprehensive analysis of multiple phase-related transcriptomic datasets of the migratory *** defined PhaseCore genes according to their contribution to phase differentiation by the adjustment for confounding principal components analysis algorithm(AC-PCA).Compared with other genes,PhaseCore genes predicted phase status with over 87.5%accuracy and displayed more unique gene attributes including the faster evolution rate,higher CpG content and higher specific expression ***,we identified 20 transcription factors(TFs)named PhaseCoreTF genes that are associated with the regulation of PhaseCore ***,we experimentally verified the regulatory roles of three representative TFs(Hr4,Hr46,and grh)in phase change by *** findings revealed that core transcriptional signatures are involved in the global regulation of locust phase changes,suggesting a potential common mechanism underlying phenotypic plasticity in *** expression and network data are accessible in an online resource called LocustMine(http://***:8080/locustmine).

关键词： phenotypic plasticity transcriptional regulatory network RNA interference

Neuropeptide ACP is required for fat body lipid metabolism homeostasis in locusts

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Insect Science 2024年第5期31卷 1453-1465页

作者： Li Hou Siyuan Guo Yuanyuan wang Shaoye Liu xianhui wang State Key Laboratory of Integrated Management of Pest Insects and Rodents Instute of ZoologyChinese Academy of SciencesBejingChina University of Chinese Academy of Sciences BejingChina

Fat body metabolism plays crucial roles in each aspect of insect life *** neuropeptides have been documented to be one of the major neuroendocrinal regulators involved in fat body metabolism,the detailed regulatory mechanism is poorly ***,we conducted comparative metabolome and transcriptome analyses of fat body between wide type(WT)and adipokinetic hormone/corazonin-related peptide(ACP)loss of function mutants of the migratory locust,Locusta *** found that knockout of ACP resulted in significantly reduced fat body triacylglycerol content but enhanced abundance of phospholipids,particularly phosphatidylcholine and ***,the expression levels of genes involved in triacylglyc-erol and phospholipid synthesis and degradation were significantly altered in the fat body of ACP ***,female ACP mutants displayed much higher fecundity com-pared to WT *** findings highlight the important role of neuropeptide ACP in fat body lipid metabolism homeostasis in locusts.

关键词： fecundity lipid metabolism metabolome neuropeptide transcriptome

Combination of steam-enhanced extraction and electrical resistance heating for efficient remediation of perchloroethylene-contaminated soil:Coupling merits and energy consumption

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Frontiers of Environmental Science & Engineering 2022年第11期16卷 249-260页

作者： Rui Yue Zhikang Chen Liujun Liu Lipu Yin Yicheng Qiu xianhui wang Zhicheng wang Xuhui Mao School of Resource and Environmental Sciences Wuhan UniversityWuhan 430079China China State Science Dingshi Environmental Engineering Company Beijing 100020China

In situ thermal desorption(ISTD)technology effectively remediates soil contaminated by dense nonaqueous phase liquids(DNAPLs).However,more efforts are required to minimize the energy consumption of ISTD *** study developed a laboratory-scale experimental device to explore the coupling merits of two traditional desorption technologies:steam-enhanced extraction(SEE)and electrical resistance heating(ERH).The results showed that injecting high-density steam(>1 g/min)into loam or clay with relatively high moisture content(>13.3%)could fracture the soil matrix and lead to the occurrence of the preferential flow of *** ERH alone,the electrical resistance and soil moisture loss were critical factors influencing heating *** ERH and SEE were combined,preheating soil by ERH could increase soil permeability,effectively alleviating the problem of preferential flow of ***,steam injection heated the soil and provided moisture for maintaining soil electrical conductivity,thereby ensuring power stability in the ERH *** with ERH alone(8 V/cm)and SEE alone(1 g/min steam),the energy consumption of combined method in remediating perchloroethylene-contaminated soil was reduced by 39.3%and 52.9%,*** findings indicate that the combined method is more favorable than ERH or SEE alone for remediating DNAPL-contaminated subsurfaces when considering ISTD technology.

关键词： Steam-enhanced extraction Electrical resistance heating Dense nonaqueous phase liquid Soil remediation Energy consumption

Chemical looping oxidative propane dehydrogenation controlled by oxygen bulk diffusion over FeVO_(4)oxygen carrier pellets

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Chinese Journal of Chemical Engineering 2023年第1期53卷 409-420页

作者： Hongbo Song Wei wang Jiachen Sun xianhui wang Xianhua Zhang Sai Chen Chunlei Pei Zhi-Jian Zhao Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China Zhejiang Institute of Tianjin University Ningbo 315201China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207China Department of Chemistry National University of Singapore3 Science Drive 3117543Singapore

The oxygen distribution and evolution within the oxygen carrier exert significant influence on chemical looping *** paper describes the influence of oxygen bulk diffusion within FeVO4 oxygen carrier pellets on the chemical looping oxidative propane dehydrogenation(CL-ODH).During CL-ODH,the oxygen concentration at the pellet surface initially decreased and then maintained stable before the final *** the stage with the stable surface oxygen concentration,the reaction showed a stable C3H6 formation rate and high C3H6 ***,based on Fick’s second law,the oxygen distribution and evolution in the oxygen carrier at this stage were further *** was found that main reactions of selective oxidation and over-oxidation were controlled by the oxygen bulk diffusion.C3H8 conversion rate kept decreasing during this stage due to the decrease of the oxygen flux caused by the decline of oxygen gradient within the oxygen carrier,while C3H6 selectivity increased due to the decrease of *** addition,reaction rates could increase with the propane partial pressure due to the increase of the oxygen gradient within the oxygen carrier until the bulk transfer reached its limit at higher propane partial *** study provides fundamental insights for the diffusion-controlled chemical looping reactions.

关键词： Chemical looping Diffusion Reaction kinetics Oxygen carriers Oxidation

Correction to:Core transcriptional signatures of phase change in the migratory locust

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Protein & Cell 2020年第9期11卷 696-697页

作者： Pengcheng Yang Li Hou xianhui wang Le Kang Bejjing Institutes of Life Science Chinese Academy of SciencesBeijing 100101China State Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of ZoologyChinese Academy of SciencesBeijing 100101China

In the original publication the photo of the gregarious adult locust in Fig.1A is *** correct photo of adult migratory locust is provided in this *** ACCESS This article is licensed under a Creative Commons Attribution 4.0 International License,which permits use,sharing,adaptation,distribution and reproduction in any medium or format,as long as you give appropriate credit to the original author(s)and the source,provide a link to the Creative Commons licence,and indicate if changes were *** images or other third party material in this article are included in the article's Creative Commons licence,unless indicated otherwise in a credit line to the *** material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use,you will need to obtain permission directly from the copyright holder.

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