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Reactive destabilization and bidirectional catalyzation for reversible hydrogen storage of LiBH_(4) by novel waxberry-like nano-additive assembled from ultrafine Fe_(3)O_(4) particles

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Journal of Materials science & Technology 2024年第6期173卷 63-71页

作者： s.wang M.H.Wu Y.Y.Zhu Z.L.Li Y.X.Yang Y.Z.Li H.F.Liu M.X.Gao Department of Material science Shenzhen MSU-BIT UniversityShenzhen 518172China state Key Laboratory of silicon and Advanced semiconductor Materials&school of Materials science and Engineering Zhejiang UniversityHangzhou 310027China Institute of Resources Utilization and Rare Earth Development State Key Laboratory of Rare Metals Separation and Comprehensive UtilizationGuangdong Provincial Key Laboratory of Rare Earth Development and ApplicationGuangdong Academy of SciencesGuangzhou 510650China Institute of science and Technology for New Energy Xi’an Technological UniversityXi’an 710021China National supercomputing Center in shenzhen Shenzhen 518055China

LiBH_(4) containing 18.5 wt.%H_(2) is an attractive high-capacity hydrogen storage material,however,it suffers from high operation temperature and poor ***,a novel and low-cost bifunctional additive,waxberry-like Fe_(3)O_(4) secondary nanospheres assembled from ultrafine primary Fe_(3)O_(4) nanoparticles,is synthesized,which exhibits significant destabilization and bidirectional catalyzation towards(de)hydrogenation of LiBH_(4).With an optimized addition of 30 wt.% waxberry-like Fe_(3)O_(4),the system initiated dehydrogenation below 100℃ and released a total of 8.1 wt.%H_(2) to 400℃.After 10 cycles,a capacity retention of 70% was achieved,greatly superior to previously reported oxides-modified *** destabilizing and catalyzing mechanisms of waxberry-like Fe_(3)O_(4) on LiBH_(4) were systematically analyzed by phase and microstructural evolutions during dehydrogenation and hydrogenation cycling as well as density functional theory(DFT)*** present work provides new insights in developing advanced nano-additives with unique structural and multifunctional designs towards LiBH4 hydrogen storage.

关键词： LiBH_(4) Hydrogen storage Waxberry-like Fe_(3)O_(4) Destabilization Catalysis

DEGREE 3 ALGEBRAIC MINIMAL sURFACEs IN THE 3-sPHERE

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Acta Mathematica scientia 2012年第6期32卷 2065-2084页

作者： Joe s.wang 4 Ricado Ln St.LauisM063124USA

We give a local analytic characterization that a minimal surface in the 3-sphere s3 C R4 defined by an irreducible cubic polynomial is one of the Lawson＇s minimal tori. This provides an alternative proof of the result by Perdomo （Characterization of order 3 algebraic immersed minimal surfaces of s3, Geom. Dedicata 129 （2007）, 23 34）.

关键词： algebraic minimal surface 3-sphere cubic polynomial

Effects of progesterone on gastric emptying and intestinal transit in male rats

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World Journal of Gastroenterology 2002年第2期8卷 338-341页

作者： Paulus s.wang Department of Physiology School of MedicineNational Yang-Ming UniversityTaipei 11221China

AIM: To study the dose-dependent of progesterone (P) effect and the interaction between the oxytocin (OT) and P on gastrointestinal motility. METHODs: In order to monitor the gastric emptying and intestinal transit, the sD male rats were intubated via a catheter with normal saline (3 ml/kg) containing Na(2)(51)CrO(4) (0.5 microCi/ml) and 10% charcoal. OT was dissolved into normal saline and P was dissolved into 75% alcohol. REsULTs: Low does of P (1 mg/kg, i.p.) enhanced the gastric emptying (75+/-3%, Pse of P (5 mg/kg, i.p.) inhibit it (42+/-11.2%, Psed the intestinal transit (4.2+/-0.3, Pse (10-20 mg/kg) had no effect. OT (0.8 mg/kg, i.p.) inhibited the gastric emptying (23.5+/-9.8%, Ps of P(20 mg/kg) (32+/-9.7%, Pstric emptying enhanced each other when the two chemicals were administrated simultaneously (17+/-9.4%, PsION: Low dose of P increased GI motility while high dose of P decreased it. During the later period of pregnancy, elevated plasma level of OT may also participate in the gastrointestinal inhibition.

关键词： Animals Drug Interactions Gastric Emptying Gastrointestinal Transit Male Oxytocin Progesterone Random Allocation Rats Rats, sprague-Dawley Research support, Non-U.s. Gov't

Flexible and transparent piezoelectric loudspeaker

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npj Flexible Electronics 2021年第1期5卷 198-203页

作者： M.shehzad s.wang Y.wang school of Materials science and Engineering Nanjing University of Science and TechnologyNanjingJiangsuChina school of Chemical and Materials Engineering National University of Sciences and Technology(NUST)H-12IslamabadPakistan

The simple structure of flexible piezoelectric polymers implies promise innumerous applications,such as transparent *** this study,we fabricated and characterized a prototype loudspeaker *** loudspeaker was fabricated using a straightforward method of sandwiching a film of copolymer blend between a pair of flexible ITO substrates,which served as top and bottom *** dependence of acoustic properties of the devices was investigated in accordance with d_(33)and piezoresponse force microscopy(PFM).In this study,we examine the sound pressure level(sPL)and sound intensity(sI)of devices featuring 0.5≤α≤0.9 blends,with an active area of 6.5 cm×5 cm at 100 Vpp applied *** we report sPL of 96 dB and sI of 3.98mWm^(−2)for anα=0.7 blend at 100 *** results are helpful in developing flexible,transparent piezoelectric polymers and in the development of lightweight,transparent loudspeaker devices.

关键词： transparent piezoelectric straight

Higher-Order Line Element Analysis of Potential Field with slender Heterogeneities

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Computers, Materials & Continua 2016年第3期51卷 145-161页

作者： H.-s.wang H.Jiang B.Yang school of Optoelectronics Beijing Institute of Technology Beijing 100081China Department of Mechanical and Aerospace Engineering University of Texas at Arlington ArlingtonTX 76019USA state Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhanHuBei 430074China

Potential field due to line sources residing on slender heterogeneities is involved in various areas,such as heat conduction,potential flow,and *** dipolar line sources are either prescribed or induced due to close interaction with other *** calculation requires a higher-order scheme to take into account the dipolar effect as well as net source *** the present work,we apply such a higher-order line element method to analyze the potential field with cylindrical slender *** a benchmark example of two parallel rods,we compare the line element solution with the boundary element solution to show the accuracy as a function in terms of rods ***,we use more complicated examples to demonstrate the capability of the line element technique.

关键词： Electrostatics Heat conduction Integral equation technique Line element method Mesh reduction method,Potential field problems

Mechanical properties evaluation for thin film/substrate material systems

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Theoretical & Applied Mechanics Letters 2018年第1期8卷 1-2页

作者： simon s.wang Zhanwei Liu Christopher M.Harvey Department of Aeronautical and Automotive Engineering Loughborough University school of Aerospace Engineering Beijing Institute of Technology

Thin film/substrate material systems have been widely used in various industries such as aerospace,automotive,marine and *** example is thermal barrier coatings(TBCs):TBCs are extensively applied to metallic components on gas turbine engines in order to protect them from high and prolonged heat loads,and they play an essential role in the aircraft *** example is laminated polymer matrix composites(PMCs),reinforced with fibers such as carbon,glass or aramid:These materials have been extensively employed in a variety of applications due to their superior properties and the improving ease and cost-effectiveness of fabricating *** evaluation of mechanical properties for thin film/substrate material systems is imperative for more efficient use of these material systems and further improvements.

关键词： TBCs PMCs various industries

A Two-Parameter Continuation Method for Rotating Two-Component Bose-Einstein Condensates in Optical Lattices

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Communications in Computational Physics 2013年第2期13卷 442-460页

作者： Y.-s.wang B.-W.Jeng C.-s.Chien Department of Applied Mathematics National Chung Hsing UniversityTaichung 402Taiwan Department of Mathematics Education National Taichung University of EducationTaichung 403Taiwan Department of Computer science and Information Engineering Ching Yun UniversityJungli 320Taiwan

We study efficient spectral-collocation and continuation methods(sCCM)for rotating two-component Bose-Einstein condensates(BECs)and rotating two-component BECs in optical lattices,where the second kind Chebyshev polynomials are used as the basis functions for the trial function space.A novel two-parameter continuation algorithm is proposed for computing the ground state and first excited state solutions of the governing Gross-Pitaevskii equations(GPEs),where the classical tangent vector is split into two constraint conditions for the bordered linear *** results on rotating two-component BECs and rotating two-component BECs in optical lattices are *** results on the former are consistent with the published numerical results.

关键词： spectral collocation method second kind Chebyshev polynomials periodic potential bifurcation

Vented Individual Patient(VIP)Hoods for the Control of Infectious Airborne Diseases in Healthcare Facilities

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Engineering 2022年第8期8卷 126-132页

作者： J.Patel F.McGain T.Bhatelia s.wang B.sun J.Monty V.Pareek CsIRO Energy MelbourneVIC 3169Australia Western Health MelbourneVIC 3021Australia school of Public Health The University of SydneySydneyNSW 2006Australia Centre for Integrated Critical Care The University of MelbourneMelbourneVIC 3010Australia The Western Australian school of Mines:Minerals Energy and Chemical EngineeringCurtin UniversityPerthWA 6102Australia Department of Mechanical Engineering City University of Hong KongHong Kong 999077China Department of Mechanical Engineering The University of MelbourneMelbourneVIC 3010Australia

By providing a means of separating the airborne emissions of patients from the air breathed by healthcare workers(HCWs),vented individual patient(VIP)hoods,a form of local exhaust ventilation(LEV),offer a new approach to reduce hospital-acquired infection(HAI).Results from recent studies have demonstrated that,for typical patient-emitted aerosols,VIP hoods provide protection at least equivalent to that of an N95 *** a mask,hood performance can be easily monitored and HCWs can be alerted to failure by *** appropriate use of these relatively simple devices could both reduce the reliance on personal protective equipment(PPE)for infection control and provide a low-cost and energy-efficient form of protection for hospitals and *** the development and deployment of VIP hoods has been accelerated by the coronavirus disease 2019(COVID-19)pandemic,these devices are currently an immature *** this review,we describe the state of the art of VIP hoods and identify aspects in need of further development,both in terms of device design and the protocols associated with their *** broader concept of individual patient hoods has the potential to be expanded beyond ventilation to the provision of clean conditions for individual patients and personalized control over other environmental factors such as temperature and humidity.

关键词： COVID-19 Vented individual patient hood Airborne transmission Healthcare worker Infectious disease

Economic freedom and IPO underpricing

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Frontiers of Business Research in China 2017年第4期11卷 453-483页

作者： Yibiao Chen steven s.wang Wilson H.s.Tong Hui Zhu Agriculture Bank of China International securities Co Ltd.Central Hong KongChina school of Business Renmin University of ChinaHaikouChina Faculty of Business The Hong Kong Polytechnic UniversityHong KongChina Zhejiang University of Finance and Economics NO.18 Xueyuan StreetXiasha Higher Education DistrictHangzhouZhejiang ProvinceChina

This paper examines how the difference in institutional environments constitutes differential IPO underpricing across countries. Using the Heritage Foundation＇s Index of Economic Freedom （IEF） as a proxy for the heterogeneous institutional environment, and a sample of 3728 IPOs from 22 countries and regions over the period 1993--2014, we find that countries with higher economic freedom have significantly less serious IPO underpricing problems. Moreover, we find that among the 10 economic freedom factors covered by theIEF, financial freedom related factors play a more important role in reducing the IPO underpricing problem. Finally, consistent with the market sentiment hypothesis, we find strong evidence that pre-IPO market sentiment influences IPO firstday returns, and that the IPO underpricing problem is less severe when the market is bearish.

关键词： IPO underpricing Institutional environment Economic freedom