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Further numerical investigation on concrete dynamic behaviors with considering stress non-equilibrium in ShPB test based on the waveform features

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Acta Mechanica Sinica 2020年第4期36卷 873-886页

作者： T.h.lv X.W.Chen Y.J.Deng G.Chen State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province Southwest University of Science and TechnologyMianyang 621000China Institute of Systems Engineering China Academy of Engineering PhysicsMianyang 621999China

In this study,with the meso-scale model reliably validated in our previous work(Construction and Building Materials,2018),the waveform features of plain concrete under various loading conditions and especially with considering stress non-equilibrium are reliably reproduced and *** with waveform features,the violation indicator of the specimen stress equilibrium in the split hopkinson pressure bar test is identified for concrete-like damage softening *** concrete material behaviors for stress non-equilibrium are further analyzed,*** dynamic increase factor(DIF)and damage development,*** conception of“damage failure volume”is introduced,and a new method of defining the development of concrete dynamic damage is given in the nimierical ***’s more,the“compression wave”and“double peak”phenomena observed in the experiment are further interpreted based on the means of numerical *** features how to reflect the concrete material properties is also *** results show that,the disappearance of the“double peak” phenomenon of reflection curve under high strain rate can be regarded as the indicator of the violation of stress *** the violation of the stress equilibrium,the relevant DIFs of the concrete specimen will not change ***,the concrete specimen will turn into structural response from material *** conception of“damage failure volume”can well explain the generation of the“double peak”phenomenon of the reflection *** “compression wave” phenomenon of reflection curve under lower strain rates is derived from the unloading expansion recovery of the concrete ***,under the same loading condition,the amplitude of the first peak of the reflection curve can be used as the evaluation standard of the bonding quality between mortar and aggregates.

关键词： Concrete material Split hopkinson pressure bar test Numerical investigation Waveform feature Stress non-equilibrium Damage failure volume

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Co-production of hydrogen, oxygen, and electricity via an integrated solar-driven system with decoupled water electrolyzer and Na-Zn ion battery

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Journal of Energy Chemistry 2025年第1期100卷 621-627页

作者： Fei lv Longjie Liu Jiazhe Wu Pengfei Wang Lixia Pan Dengwei Jing Yubin Chen International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University

Combining water electrolysis and rechargeable battery technologies into a single system holds great promise for the co-production of hydrogen （h2） and ***,the design and development of such systems is still in its ***,an integrated hydrogen-oxygen （O2）-electricity co-production system featuring a bipolar membrane-assisted decoupled electrolyzer and a Na-Zn ion battery was established with sodium nickelhexacyanoferrate （NaNihCF） and Zn2+/Zn as dual redox *** decoupled electrolyzer enables to produce h2and O2in different time and space with almost 100%Faradaic efficiency at 100 mA ***,the charged NaNihCF and Zn electrodes after the electrolysis processes formed a Na-Zn ion battery,which can generate electricity with an average cell voltage of 1.75 V at 10 m A *** connecting Si photovoltaics with the modular electrochemical device,a well-matched solar driven system was built to convert the intermittent solar energy into hydrogen and electric energy with a solar to hydrogen-electricity efficiency of 16.7%,demonstrating the flexible storage and conversion of renewables.

关键词： hydrogen Electricity Decoupled water electrolyzer Na-Zn ion battery Solar energy

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Thermogravimetric analysis of the hydrolysis of zinc

Thermogravimetric analysis of the hydrolysis of zinc

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第九届全国氢能学术会议

作者： M.lv,J.h.Zhou,W.J.Yang,K.F.Cen Zhejiang University,China

The production of hydrogen via the hydrolysis of zinc has been applied to a two-step water splitting thermochemical cycle using high-temperature solar process *** measurements were conducted on the hydrolysis of zinc to reveal the reaction mechanism and elucidate the influence of heating rate,water partial pressure,total process pressure,and the particle size and purity of zinc on the reaction *** experimental results shows that

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A mild, configurable, flexible CoNi-LDh（v）/Zn battery based on h-vacancy-induced reversible Zn2+ intercalation

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Journal of Energy Chemistry 2025年第1期100卷 498-508页

作者： Xinyue Cheng Dingsheng Wu hao Gao Qingqing Wang Pengfei lv Sam S.Yoon Qufu Wei Key Laboratory of Eco-textiles Ministry of Education Jiangnan University School of Mechanical Engineering Korea University

Flexible Zn-based batteries have attracted increasing research interest as essential components of wearable energy storage ***,the advancement of flexible aqueous Zn-based batteries based on Co-Ni layered double hydroxide （CoNi-LDh） as the cathode material is hampered by their poor cycling stability and the corrosiveness of alkaline ***,CoNi-LDh nanosheets enriched with h vacancies (CoNi-LDh（v）) were constructed on a flexible carbon cloth （CC） substrate via electrochemical deposition and *** Zn-based battery comprising CoNi-LDh（v）@CC as the cathode exhibited highly reversible conversion reactions and stable operation in 3 M ZnSO4electrolyte （ph=4）.The battery delivered an excellent specific capacity (225 mA h g-1,0.26 mA h cm-2),acceptable cycling stability（53.9%,900 cycles）,and high discharging *** abundant h vacancies served as active sites for the reversible intercalation of Zn2+and the extravasation of NO3-generated channels and space for Zn2+transport and storage,together enabling an excellent Zn2+storage ***,a sandwich-structured solid-state CoNi-LDh（v）@CC//Zn@CC battery was fabricated and was found to exhibit a noteworthy electrochemical performance and mechanical *** a proof of concept,the unencapsulated battery powered a digital watch under various deformation conditions and operated stably for 80 ***,the flexible battery displayed outstanding customizability,maintaining an open-circuit voltage of 1.42 V even after being cut *** proposed engineering strategy contributes to the realization of textiles with truly wearable energy-storage devices.

关键词： CoNi/Zn battery h vacancies Mild aqueous electrolyte Tailorable battery Wearable energy storage device

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Technical Study of Exhaust Valve Seal Surface Overlaying Based on Micro-plasma Arc Welding

Technical Study of Exhaust Valve Seal Surface Overlaying Bas...

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Fifth International Conference on Surface Engineering

作者： Y.h.Xiang Y.h.lv D.Xia B.S.Xu National Key Laboratory for Remanufacturing Academy of Armored Forces Engineering Beijing China 100072

With high productivity,easy adjustment of welding parameters and free of weld defects,the micro-plasma arc welding technology is used successfully to remanufacture the exhaust valve of W615 *** ST6 Co alloy powder is selected as overlaying *** the geometry of deposited layer and economy,the processing parameters of overlaying is optimized,which include welding current,the rotate velocity of exhaust valve,the speed of feeding metal powder,*** current downslope method is developed to weaken the arc crater when arc *** microstructure characteristics of the weld are investigated by the optical microscope and X-ray *** micro-hardness and the internal stress of the deposited layer are also measured by the *** results show that the deposited layers have a fine dendrite structure at the top layer,and coarse columnar/cellular grain structures in the middle and at the bottom of the deposited *** fusion zone displays epitaxial grains structure,and the heat-affected zone within joint is not *** examinations do not detect any defects in the deposited layer or at the *** deposited layer possess a maximum hardness at the top layer with a slight decrease towards the bottom layer and fusion *** stress test show that there is low internal stress in deposited *** summary,The micro-plasma arc welding is a perfect welding method to remanufacture exhaust valve.

关键词： Exhaust valve Micro-plasma arc welding Cobalt alloy Microstructure remanufacture

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Serum Procalcitonin Increase In Earthquake Victims Associated With Sepsis

Serum Procalcitonin Increase In Earthquake Victims Associate...

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中华医学会第九次全国检验医学学术会议暨中国医院协会临床检验管理专业委员会第六届全国临床检验实验室管理学术会议

作者： Liang Guo,Yi Xie,Ming-jie Xiong,Xis-fei lv,h ong Fan,Mei Kang,Chuan-min Tao Zhi-xing Chen,Ling Shu,Lan Luo Department of Laboratory Medicine,West China hospital,Sichuan University

Obiective Procalcitonin(PCT) as the biologically active precursor of calcitonin,had shown closely correlation with outcome of critically ill patients. Serum concentration of PCT was rapid rising during bacterial infections. Methods the PCT was assessed with C-reactive protein(CRP),Acute Physiology and Chronic health EvaluationⅡ(APAChEⅡ) and result of blood cluture in rescuing earthquake vitims after

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Experimental and stimulant study of pressure drop in active carbon granule ventilation

Experimental and stimulant study of pressure drop in active ...

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第九届全国氢能学术会议

作者： Z.Chen~1,h.lv~1,X.W.Ma~1,J.X.Ma~1 1 Tongji University,China 2 Shanghai Fuel Cell Vehicle Powertrain Co,LTD.,China

SO and NO are reported to have the most negative effect on the performance of PEMFC *** carbon is always used as adsorptive material in fuel cell air filter to eliminate these *** this paper,pressure drop in active carbon granule ventilation is tested by *** CFD tool(Fluent) to simulate the pressure drop in active carbon

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The Lobster Eye Imager for Astronomy Onboard the SATech-01 Satellite

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Research in Astronomy and Astrophysics 2023年第9期23卷 66-78页

作者： Z.X.Ling X.J.Sun C.Zhang S.L.Sun G.Jin S.N.Zhang X.F.Zhang J.B.Chang F.S.Chen Y.F.Chen Z.W.Cheng W.Fu Y.X.han h.Li J.F.Li Y.Li Z.D.Li P.R.Liu Y.h.lv X.h.Ma Y.J.Tang C.B.Wang R.J.Xie Y.L.Xue A.L.Yan Q.Zhang C.Y.Bao h.B.Cai h.Q.Cheng C.Z.Cui Y.F.Dai D.W.Fan h.B.hu J.W.hu M.h.huang Z.Q.Jia C.C.Jin D.Y.Li J.Q.Li h.Y.Liu M.J.Liu Y.Liu h.W.Pan Y.L.Qiu M.Sugizaki h.Sun W.X.Wang Y.L.Wang Q.Y.Wu X.P.Xu Y.F.Xu h.N.Yang X.Yang B.Zhang M.Zhang W.D.Zhang Z.Zhang D.h.Zhao X.Q.Cong B.W.Jiang L.h.Li X.B.Qiu J.N.Sun D.T.Su J.Wang C.Wu Z.Xu X.M.Yang S.K.Zhang Z.Zhang N.Zhang Y.F.Zhu h.Y.Ban X.Z.Bi Z.M.Cai W.Chen X.Chen Y.h.Chen Y.Cui X.L.Duan Z.G Feng Y.Gao J.W.he T.he J.J.huang F.Li J.S.Li T.J.Li T.T.Li h.Q.Liu L.Liu R.Liu S.Liu N.Meng Q.Shi A.T.Sun Y.M.Wang Y.B.Wang h.C.Wu D.X Xu Y.Q Yang Y.Yang X.S.Yu K.X.Zhang Y.L.Zhang Y.h.Zhang Y.T.Zhang h.Zhou X.C.Zhu J.S.Cheng L.Qin L.Wang Q.L.Wang M.Bai R.L.Gao Z.Ji Y.R.Liu F.L.Ma Y.J.Shi J.Su Y.Y.Tan J.Z.Tong h.T.Xu C.B.Xue G.F.Xue W.Yuan National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China Shanghai Institute of Technical Physics Chinese Academy of SciencesShanghai 200083China North Night Vision Technology Co. LTDNanjing 211106China Institute of high Energy Physics Chinese Academy of SciencesBeijing 100049China Science and Technology on Low-Light-Level Night Vision Laboratory Xi'an 710065China Innovation Academy for Microsatellites Chinese Academy of SciencesShanghai 201204China Institute of Electrical Engineering Chinese Academy of ScienceBeijing 100190China National Space Science Center Chinese Academy of ScienceBeijing 100190China

The Lobster Eye Imager for Astronomy(LEIA),a pathfinder of the Wide-field X-ray Telescope of the Einstein Probe mission,was successfully launched onboard the SATech-01 satellite of the Chinese Academy of Sciences on2022 July *** this paper,we introduce the design and on-ground test results of the LEIA *** stateof-the-art Micro-Pore Optics(MPO),a wide field of view of 346 square degrees(18.6°×18.6°)of the X-ray imager is *** optical assembly composed of 36 MPO chips is used to focus incident X-ray photons,and four large-format complementary metal-oxide semiconductor(CMOS)sensors,each of size 6 cm×6 cm,are used as the focal plane *** instrument has an angular resolution of 4’-8’(in terms of FWhM)for the central focal spot of the point-spread function,and an effective area of 2-3 cm^(2) at 1 keV in essentially all the directions within the field of *** detection passband is 0.5-4 keV in soft X-rays and the sensitivity is2-3×10^(-11) erg s^(-1) cm^(-2)(about 1 milliCrab)with a 1000 s *** total weight of LEIA is 56 kg and the power is 85 *** satellite,with a design lifetime of 2 yr,operates in a Sun-synchronous orbit of 500 km with an orbital period of 95 *** is paving the way for future missions by verifying in flight the technologies of both novel focusing imaging optics and CMOS sensors for X-ray observation,and by optimizing the working setups of the instrumental *** addition,LEIA is able to carry out scientific observations to find new transients and to monitor known sources in the soft X-ray band,albeit with limited useful observing time available.

关键词： instrumentation detectors-space vehicles instruments-telescopes-X-rays genera

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hydrogenolysis of organosolv hydrolyzed lignin over high-dispersion Ni/Al-SBA-15 catalysts for phenolic monomers

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Chinese Journal of Chemical Engineering 2021年第4期34卷 307-314页

作者： Ying Xu Pengru Chen Wei lv Chenguang Wang Longlong Ma Qi Zhang Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou 510640China Key Laboratory of Renewable Energy Chinese Academy of SciencesGuangzhou 510640China Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development Guangzhou 510640China Jiangsu Key Laboratory for Biomass Energy and Material Nanjing 210042China

Efficiency and recycling of catalysts are important for the lignin hydrogenolysis to obtain phenolic *** this work,a series of highdispersion Ni/AlSBA15 catalysts were prepared by a direct and effective preparation method,and then used in the hydrogenolysis of diphenyl ether(DE)and organosolv hydrolyzed lignin(OhL)for phenolic *** universality of asmade catalysts in different solvents and cyclic performance were *** showed that the addition of ethylene glycol(EG)during the loading process of Ni promoted the dispersion of metal *** dispersion of Ni species could highly enhance the conversion of DE and the OhL which Ni/AlSBA15(1EG)exhibited the excellent catalytic *** was found to be most effective solvent on the conversion of DE(99.16%).84.77%liquefaction ratio and 21.36%monomer yield were achieved,and no obvious char was observed after the depolymerization of OhL in ethanol solvent at 280℃for 4 h over the Ni/AlSBA15(1EG)catalyst.

关键词： Lignin hydrogenolysis depolymerization high-dispersion Ni-based catalyst Al-SBA-15

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1型糖尿病患者的血糖控制,心脏自身免疫和心血管病的长期风险

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中华高血压杂志 2019年第1期27卷 99-99页

作者： Sousa GR Pober D Galderisi A lv h Yu L Pereira AC Doria A Kosiborod M Lipes MA 刘莉叶鹏

血糖控制不佳与1型糖尿病(type 1diabetes mellitus,T1DM)患者的心血管病风险增加有关;然而,对T1DM的特异性机制知之甚少。在T1DM中,心肌损伤可诱发持续的心脏自身免疫。慢性高血糖症引起心肌损伤,高血糖诱导的心脏自身免疫可能导致长... 详细信息

血糖控制不佳与1型糖尿病(type 1diabetes mellitus,T1DM)患者的心血管病风险增加有关;然而,对T1DM的特异性机制知之甚少。在T1DM中,心肌损伤可诱发持续的心脏自身免疫。慢性高血糖症引起心肌损伤,高血糖诱导的心脏自身免疫可能导致长期心血管病并发症的可能性。

关键词：血糖控制心血管病糖尿病患者自身免疫

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