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Journal of Rock Mechanics and Geotechnical Engineering 2022年第2期14卷 663-669页

作者： Yue Qin Qiankun Wang dongsheng xu Jiaming Yan Shanshan Zhang School of Civil Engineering and Architecture Wuhan University of TechnologyWuhan430070China

A novel fiber Bragg grating(FBG)sensor with three-dimensional(3D)fused deposition modeling(FDM)approach is proposed for effective stress measurement in soil *** three-diaphragm structure design is developed to measure earth and water pressures *** proposed transducer has advantages of small size,high sensitivity,low cost,immunity to electromagnetic interference and rapid *** working principle,design parameters,and manufacturing details are *** proposed transducer was calibrated for earth and water pressures measurement by using weights and a specially designed pressure chamber,*** calibration results showed that the wavelength of the transducer was proportional to the applied *** sensitivity coefficients of the earth and water pressures were 12.633 nm/MPa and 6.282 nm/MPa,*** tests and error analysis demonstrated the excellent stability and accuracy of the earth and water pressure *** performance of the proposed transducer was further verified by a model experimental test and numerical analysis,which indicated that the proposed transducer has great potential for practical applications.

关键词： Fused deposition modeling(FDM) Fiber bragg-grating(FBG)sensor Earth pressure Water pressure

富氢环境下Ni/LaInO3高效光热催化逆水汽转化反应（英文）

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富氢环境下Ni/LaInO3高效光热催化逆水汽转化反应（英文）

Application of intelligent rehabilitation equipment in occupational therapy for enhancing upper limb function of patients in the whole phase of stroke

第4届分子科学博士后学术年会

作者： Jianbo Yu dongsheng xu Aidaer Muhetaer Xiaowen Gao Zhenzhen Zhang Yuying Yang Qi Li Langxing Chen Haichao Liu College of Chemistry and Molecular Engineering Peking University

CO能源化是当前实现碳中和目标的有效途径之一。在各种方法中,CO加氢是获得各种能源化产品如CO、烃类和醇类的重要途径。在工业上,RWGS反应用于控制FTS气中CO和H的比例,进而合成生产具有更高价值的碳氢燃料。在传统的RWGS反应中,需要非... 详细信息

CO能源化是当前实现碳中和目标的有效途径之一。在各种方法中,CO加氢是获得各种能源化产品如CO、烃类和醇类的重要途径。在工业上,RWGS反应用于控制FTS气中CO和H的比例,进而合成生产具有更高价值的碳氢燃料。在传统的RWGS反应中,需要非常高的温度（500～700℃）和巨大的能量输入来克服非常高的反应焓(42.1 kJ mol)和较大C=O解离能(～750 kJ mol)。因此,亟需探索更加绿色的RWGS反应路线以降低高能耗,并通过降低反应温度来提高催化剂的稳定性。太阳能驱动的RWGS反应被视为解决能源供应可持续需求的理想方式,并可能通过一种新的活化途径来提高催化性能。通常,光热催化剂由金属氧化物载体及表面均匀分散的金属纳米颗粒组成,同时将引入多种物理机制以实现太阳能收集能力的最大化并达到相对较高的反应温度。在RWGS反应过程中,金属纳米颗粒主导H的活化、解离,而氧化物载体则为CO的吸附和活化提供活性位点。然而,如何平衡高CO产率和更高的CO转化率仍然是一个难题。例如,叶金花老师课题组设计了一种具有宽光谱吸收和大量O的黑色InO,取得了非常高的CO产量,但CO的转化率仅有53.3%。提高反应气氛中H的浓度可以有效提高CO的转化率,但由于在高H氛围下很容易形成CH或CHOH等副产物,因此很难保证CO的100%选择性。在此,本工作设计了担载Ni NPs的LaInO催化剂,并在富氢环境下高效光热催化RWGS反应进行,其中优化后的光热催化剂实现了1314 mmol g h(即26.29 mmol gh)的CO产率,选择性也达到了近100%,并且CO的转化率超过了72%。XPS表征表明,LaInO中相对丰富的O有利于增强CO的吸附和光热活化。此外,相对于纯热催化,光热催化显著降低了反应E,这可能归因于光诱导电荷转移过程。

关键词：金属纳米颗粒光热催化 Ni/LaInO3

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Medicine in Novel Technology and Devices 2021年第4期12卷 8-15页

作者： Wenxi Li dongsheng xu Yueyang Integrated Chinese and Western Medicine Hospital Shanghai University of Traditional Chinese MedicineShanghaiChina Engineering Research Center of Traditional Chinese Medicine Intelligent Rehabilitation Ministry of EducationShanghaiChina

Stroke was one of the leading causes of death in the Chinese population in *** stroke survivors may suffer from different levels of disabilities,which prevents them from returning to their daily *** decreased upper limb function is considered as the principal factor that makes the patients have less access to their activities of daily *** therapy(OT),aiming to enhance patients'functional performances and improve the participation in daily activities is usually applied from the onset of ***,conventional OT intervention still has several problems that need to be solved,such as the inefficient use of human resources,inadequate upper limb functional training and non-continuous OT *** address these difficulties and improve the patients'functional outcomes,intelligent rehabilitation equipment is combined with OT through evaluation and *** on this combination,OT can be provided in health care facilities,home,and community for patients with all phases of *** combination promotes the transition of OT to digitization,intelligence and homogenization.

关键词： Stroke Occupational therapy Rehabilitation devices Robotic technology Virtual reality Home rehabilitation

Energy paths of twin-related lattice reorientation in hexagonal metals via ab initio calculations

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Journal of Materials Science & Technology 2018年第4期34卷 700-707页

作者： Gang Zhou Lihua Ye Hao Wang dongsheng xu Changgong Meng Rui Yang Institute of Metal Research Chinese Academy of SciencesShenyang 110016China Dalian University of Technology Dalian 116024China

Employing ab initio calculations, we systematically investigated tile energy paths of [1012] twin-related lattice reorientation in hexagonal metals Be, Mg, Sc, Ti, Co, Y, Zr, Tc, Ru, Gd, Tb, Dy, Ho, Er, Tin, Lu, Hf, Re, and Os. Among the studied systems, lattice reorientation energy increases in the order of Mg, Gd, Tb, Dy, Zr, Tc, Ti, Ho, Y, Co, Er, Sc, Be, Tin, Lu, Hf, Re, Ru and Os. The reorientation process consists of shear and shuffle components. Concerning the significance of shuffle, these hexagonal metals fall into two groups. In the first group, which includes Mg, Co, Ru, Re and Os, regardless of the shear amount, subsequent shuffle is an energy-uphill process, while in the second group, which includes Ti, Tc, Be, Y. Gd, Tb, Dy, Ho, Zr, Er, Sc, Hf, Lu and Tin, shuffle becomes an energy-downhill process if shear component reaches an adequate level （at least 60%）. These results qualitatively explain the present observation of lattice reorientation in hexagonal metals, and shed light upon a general understanding on the [1012] twinning behavior in the aim of improving materials properties.

关键词： Hexagonal metal Twin Shear Shuffle First-principles

A phase-field model for simulating the growth ofαsideplates with branching in titanium alloys

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Journal of Materials Science & Technology 2022年第28期123卷 154-158页

作者： Jinhu Zhang Min Qi Haisheng xu Hao Wang Yingjie Ma dongsheng xu Rui Yang Institute of Metal Research Chinese Academy of SciencesShenyang 110016China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China University of Shanghai for Science and Technology Shanghai 200093China

In recent years,titanium and titanium alloys are widely used in the fields of aerospace,oceans,*** to their high strength to weight ratio,good toughness and excellent corrosion resistance[1].Various microstructures and mechanical properties can be ob-tained simply by varying the thermomechanical processing or heat *** an example,the Widmanstätten structure may pos-sess good tensile strength,fracture toughness,fatigue properties and high resistance to crack growth[2].It is formed when tita-nium alloys are cooled from theβphase *** the cooling process,αGB(grain boundaryα)may first nucleates at the priorβgrain boundary,and then theαW(Widmanstättenα)grows fromαGB and forms intragranularαsideplates colony[3].The compli-cated evolution process is difficult to characterize experimentally,since the microstructures observed experimentally are mostly ul-timate results,but not a dynamic evolution process.

关键词： alloys toughness resistance

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钛铝合金包晶相变的多相场模拟研究

铸造技术 2024年第9期45卷 873-879页

作者：许海生张金虎王锦程徐东生中国科学院金属研究所西北工业大学凝固技术国家重点实验室

包晶相变使传统钛铝合金在铸造过程中极易出现成分偏析、显微组织粗大等现象，导致塑性较差且各向异性明显，显著影响了钛铝合金的使役性能。为深入理解包晶相变过程并进一步合理调控微观组织，本文建立了适用于可描述钛铝合金包晶相变... 详细信息

包晶相变使传统钛铝合金在铸造过程中极易出现成分偏析、显微组织粗大等现象，导致塑性较差且各向异性明显，显著影响了钛铝合金的使役性能。为深入理解包晶相变过程并进一步合理调控微观组织，本文建立了适用于可描述钛铝合金包晶相变的多相场模型，基于定量化多相自由能输入、多相界面处理、考虑反溶质截流及相界面处虚拟相成分的简化计算策略，针对Ti-45Al（原子分数）合金的包晶相变过程，主要研究了过冷度对包晶相变时微观组织演变的影响规律。研究发现，发生包晶反应（β+L→α）时，α相沿着β/L界面快速增长。考虑到α向L与β相的生长速度存在差异，使得α相片层生长时表现出非对称性。包晶转变过程由扩散控制，α/L、α/β相界面的迁移满足xij=Aijt1/2规律。随着过冷度增大，两种相界面迁移速率均增大，且α/L界面迁移速率的增幅较为显著；较低过冷度下，在α片层前端可见β相的重熔现象。增大过冷度后，其重熔现象逐渐消失，但L/β/α三相区的形状保持不变。三相交界区域形状主要由界面能（界面张力）之间的平衡决定，而与界面迁移速率的差异无关。

关键词：多相场模型凝固钛铝合金包晶相变

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A high-sensitivity H2S gas sensor based on optimized ZnO-ZnS nano-heterojunction sensing material

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Chinese Chemical Letters 2020年第8期31卷 2050-2054页

作者： Pei Ding dongsheng xu Nan Dong Ying Chen Pengcheng xu Dan Zheng Xinxin Li School of Chemical and Environmental Engineering Shanghai Institute of TechnologyShanghai 201418China State Key Lab of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China

This paper reports a high-performance H2S gas sensing material that is made of ZnO nanowires(NWs)modified by an optimal amount of ZnS to form nano-hete *** with the intrinsic ZnONWs,the three differently modified nano-heterostructure material ZnO-ZnS-x(x=5,10,15)shows significant improvement in sensing performance to H2S at the working temperatures of 100-400℃,especially in the low temperature range(<300℃).The chemiresistive sensor with ZnO-ZnS-10 sensingmaterial exhibits the largest response signal to H2S among all the other ZnO-ZnS-x(x=5,10,15,20)*** response signal to 5 ppm H2S at 150℃is about 2.7 times to that of the ZnO-NWs ***,the ZnO-ZnS-10 sensor also features satisfactory selectivity and repeatability at 150℃.With the technical advantage attributed to the reduction of the redesigned band gap at the interface between ZnO and ZnS,the ZnO-ZnS hete ro structure sensor rather than the traditional ZnO-NWs sensor can be used for high-sensitivity application at low working temperature.

关键词： ZnO-ZnS heterojunction Hydrogen sulfide Gas sensor Sensitivity detection Selectivity Band gap

Seeded growth of Ti-46Al-8Nb polysynthetically twinned crystals with an ultra-high elongation

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Journal of Materials Science & Technology 2020年第19期54卷 190-195页

作者： Hao Jin Qing Jia Quangang Xian Ronghua Liu Yuyou Cui dongsheng xu Rui Yang Institute of Metal Research Chinese Academy of SciencesShenyang110016China University of Chinese Academy of Sciences Beijing100049China

Large size polysynthetically twinned crystals of Ti-46 Al-8 Nb alloy with a parallel lamellar microstructure were successfully prepared using a Ti-43 Al-3 Si seed by our new operation.A large amount of columnar B2 phase paralleling to the growth direction was found in the final lamellar *** growth rate(>30 mm/h)led to the failure of seeding *** on these results,a new mechanism is proposed to describe the seeding process of the hypo-peritectic Ti Al *** peritecticαphase is suggested to directly nucleate from the melt,and then act as nucleus for transformedαphase in the subsequentβtoα*** the higher growth rate,the appearance ofβphase secondary dendrites and homogeneous nucleation lead to the failure of seeding *** Nb addition leads to a large amount of residualβphase,and theseβdendrites finally evolve into B2 *** room temperature tensile elongation was measured to be 11.9-18.5%for Ti-46 Al-8 Nb PST crystals,which is the highest ever reported value for Ti Al based alloys.

关键词： TiAl alloys Polysynthetically twinned crystals Peritectic solidification Seeded growth Ductility

Core-shell CdS@ZIF-8 structures for improved selectivity in photocatalytic H2 generation from formic acid

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Nano Research 2016年第9期9卷 2729-2734页

作者： Min Zeng Zhigang Chai Xin Deng Qi Li Shiqiang Feng Juan Wang dongsheng xu College of Chemistry and Chemical Engineering Hubei UniversityWuhan 430062China College of Chemistry and Molecular Engineering Peking UniversityBeijing 100871China Key Laboratory for the Synthesis and Application of Organic Functional Molecules Ministry of Education of ChinaWuhan 430062China

Encapsulating well-defined nanoparticles (NPs) into metal–organic frameworks (MOFs) to form core–shell structures not only combines their properties, but may also provide synergistic functionality. Much research attention has been focused on applying core–shell NP@MOF structures to gas storage and sensing, luminescence, lithium ion batteries, selective catalysis, and cascade reactions; however, their application as photocatalysts has been reported much more rarely. Herein, we report the design of a new core–shell structure composed of semiconductor CdS NPs as the core and ZIF-8 as the shell. Both single-core–shell and multiple-core–shell CdS@ZIF-8 were synthesized by varying the concentrations of the ZIF-8 precursor. Photocatalytic hydrogen generation from formic acid over CdS@ZIF-8 demonstrated that core–shell CdS@ZIF-8 structures exhibit increased photocatalytic selectivity for H2 generation from formic acid compared with pure CdS NPs. Furthermore, the concentration of CO in the products was significantly decreased, which benefits the application of CdS@ZIF-8 to proton-exchange membrane fuel cells. Our results provide guidance for the development of new photocatalysts based on NP@MOF core–shell materials.

关键词： metal-organic frameworks (MOFs) cadmium sulfide core-shell photocatalytic H2 generation formic acid selectivity

Determination of L-norvaline and L-tryptophan in dietary supplements by nano-LC using an O-[2-(methacryloyloxy)-ethylcarbamoyl]-10,11- dihydroquinidine-silica hybrid monolithic column

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Journal of Pharmaceutical Analysis 2020年第1期10卷 70-77页

作者： dongsheng xu Elena Sanchez-Lopez Qiqin Wang Zhengjin Jiang María Luisa Marina Departamento de Química Analítica Química Física e Ingeniería QuímicaUniversidad de AlcalaCtra.Madrid-Barcelona Km.33.60028871Alcala de Henares(Madrid)Spain Institute of Pharmaceutical Analysis College of PharmacyJinan UniversityGuangzhou510632China Department of Pharmacy and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of Traditional Chinese Medicine&New Drug Research Jinan UniversityGuangzhou510632China Instituto de Investigacion Química“Andres M.del Río”(IQAR) Universidad de AlcalaCtra.Madrid-Barcelona Km.33.60028871Alcala de Henares(Madrid)Spain

An analytical methodology based on an O-[2-(methacryloyloxy)-ethylcarbamoyl]-10,11-dihydroquinidine(MQD)-silica hybrid monolithic column was developed for the enantioseparation of 9-fluorenylmethoxycarbonyl(FMOC)derivatized amino acids by nano-liquid *** mobile phase was optimized including the apparent pH,content of ACN,and concentration of the buffer to obtain a satisfactory enantioresolution performance.27 FMOC derivatized amino acids including 19 protein and 8 non-protein amino acids were tested,and 19 out of them were enantiomerically discriminated obtaining baseline separation for 11 of *** characteristics of the method were evaluated for norvaline and tryptophan in terms of linearity,precision,accuracy,limits of detection(LOD)and quantitation(LOQ)showing good performance to be applied to the enantiomeric determination of these amino acids in dietary *** and LOQ values were 9.3 and 31 mM for norvaline enantiomers and 7.5 and 25 mM for tryptophan enantiomers,*** contents of D-norvaline and D-tryptophan were below their respective LODs in all the analyzed *** of L-tryptophan and L-norvaline showed good agreement with the labeled contents except for one sample which did not show presence of L-norvaline,contrary to the label indication.

关键词： 9-Fluorenylmethoxycarbonyl Amino acids Chiral separation Nano-LC Quinidine-silica hybrid monolithic column