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Energy storage performance and phase transition under high electric field in Na/Ta co-doped AgNbO_(3)ceramics

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Journal of Materiomics 2023年第1期9卷 19-26页

作者： Mingyuan Zhao Jing Wang Hao yuan Zehan Zheng Lei Zhao Key Laboratory of High-precision Computation and Application of Quantum Field Theory of Hebei Province College Physics Science and TechnologyHebei UniversityBaoding071002China State Key Laboratory of Mechanics and Control of Mechanical Structures College of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsNanjing210016China

Lead-free antiferroelectric ceramics with high energy storage performance show great potential in pulsed power ***,poor breakdown strength and antiferroelectric stability are the two main drawbacks that limit the energy storage performance of antiferroelectric ***,highquality(Ag_(1-x)Na_(x))(Nb_(1-x)Ta_(x))O_(3)ceramics were prepared by the tape casting *** breakdown strength was greatly improved as a result of the high density and fine grains,while the antiferroelectric stability was enhanced owning to the M2 *** from the synergistic improvement in breakdown strength and antiferroelectric stability,(Ag_(0.80)Na_(0.20))(Nb_(0.80)Ta_(0.20))O_(3)ceramic reveals a benign energy storage performance of W_(rec)=5.8 J/cm^(3)and h=61.7%with good temperature stability,frequency stability and cycling *** is also found that the high applied electric field can promote the M2-M3 phase transition,which may provide ideas to improve the thermal stability of the energy storage performance in AgNbO_(3)-based ceramics.

关键词： Antiferroelectric ceramics AgNbO_(3)-based ceramics Phase transition Tape casting process

Development Paths for China's Transport Sector under the Carbon Neutrality Goal

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Chinese Journal of Urban and Environmental Studies 2022年第2期10卷 41-56页

作者： OU Xunmin yuan Zhiyi Institute of Energy Environment and Economy Tsinghua University Tsinghua-Rio Tinto Joint Research Centre for Resources Energy and Sustainable Development Laboratory for Low Carbon Energy Tsinghua University

The greenhouse gas emissions from China’s transport sector,which account for a large proportion of China’s total greenhouse gas emissions,are still increasing ***,low-carbon transformation is urgently needed in China’s transport *** paper provides an overview of the situation and features of greenhouse gas emissions from China’s transport sector,and proposes carbon-neutral development paths for the transport sector based on current national policies,goals and previous *** needs to work on many aspects,including transport restructuring,alternative fuel technologies and energy efficiency improvement,to achieve near-zero emission goals by *** the carbon neutrality goal,China’s transport sector should strive to reach the carbon peaking by 2030,and limit carbon emissions within 100 million tons by 2060.

关键词： Transport sector carbon neutrality near-zero emissions

Intrinsic correlation between the generalized phase equilibrium condition and mechanical behaviors in hydrate-bearing sediments

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第7期16卷 2822-2832页

作者： Jiazuo Zhou Changfu Wei Rongtao Yan yuan Zhou Yi Dong Hubei Key Laboratory of Marine Geological Resources College of Marine Science and TechnologyChina University of GeosciencesWuhanChina State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhanChina Guangxi Key Laboratory of New Energy and Building Energy Saving College of Civil Engineering and ArchitectureGuilin University of TechnologyGuilinChina

The phase equilibrium and mechanical behaviors of natural gas hydrate-bearing sediment are essential for gas recovery from hydrate *** heating closed systems,the temperature-pressure path of hydrate-bearing sediment deviates from that of pure bulk hydrate,reflecting the porous media effect in phase equilibrium.A generalized phase equilibrium equation was established for hydrate-bearing sediments,which indicates that both capillary and osmotic pressures cause the phase equilibrium curve to shift leftward on the temperature-pressure *** contrast to bulk hydrate,hydrate-bearing sediment always contains a certain amount of unhydrated water,which keeps phase equilibrium with the hydrate within the hydrate stability *** changes in temperature and pressure,a portion of pore hydrate and unhydrated water may transform into each other,affecting the shear strength of hydrate-bearing sediment.A shear strength model is proposed to consider not only hydrate saturation but also the change in temperature and pressure of hydrate-bearing *** model is validated by experimental data with various hydrate saturation,temperature and pressure *** deformation induced by partial dissociation was studied through depressurization tests under constant effective *** reduction in gas pressure within the hydrate stability field indeed caused sediment *** dissociation-induced deformation can be reasonably estimated as the difference in volume between hydrate-bearing and hydrate-free sediments from the compression curves.

关键词： Hydrate-bearing sediment Generalized phase equilibrium Unhydrated water Partial dissociation Mechanical behavior

The coordination and preference of supply chain contracts based on time-sensitivity promotional mechanism

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Journal of Management Science and Engineering 2018年第3期3卷 158-178页

作者： Xin Fang Fengjiao yuan Collaborative Innovation Center for Chongqing's Modern Trade Logistics&Supply Chain Chongqing Technology and Business UniversityChongqing 400067China School of Business Planning Chongqing Technology and Business UniversityChongqing 400067China

To encourage retailers to submit orders as soon as possible,manufacturers usually launch a time-sensitivity promotional mechanism that the earlier you order,the cheaper the wholesale price will be in advance of the selling *** paper aims to investigate if the mechanism can improve supply chain performance.A dyadic decentralized supply chain system comprising a single manufacturer and a single retailer is viewed as a research ***,a benchmark model is proposed to provide a criterion-referenced for coordinating the supply chain in a non-standard distribution ***,a time-sensitive wholesale price contract is constructed to confirm that the mechanism can coordinate the supply ***,the retailer accepts the entire forecast risk under the *** improved contract called a time-sensitive revenue-sharing contract is constructed based on the notion that the manufacturer shares partial forecast *** results show that participants can arbitrarily divide the optimal supply chain's expected profit between the constructed price contracts;however,two differences exist between the contracts,that is,participants have contract ***,a numerical analysis and a few management insights are given.

关键词： Time-sensitivity Promotional Supply chain Contract Distribution-free approach

An integrated approach to study of strata behaviour and gas flow dynamics and its application

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International Journal of Coal Science & Technology 2015年第1期2卷 12-21页

作者： Hua Guo Liang yuan The Commonwealth Scientific and Industrial Research Organisation PO Box 883 Kenmore QLD 4069 Australia Huainan Mining (Group) Co. Ltd. Huainan 232001 China

This paper presents an advanced and integrated research approach to longwall mining-induced strata move- ment, stress changes, fractures, and gas flow dynamics with actual examples of its application from recent studies for coextraction of coal and methane development at Huainan Mining Group in China, in a deep and multi-seam mining environment. The advanced approach takes advantage of the latest techniques in Australia for mine scale geotechnical characterisation, field measurement, monitoring and numerical modelling. Key techniques described in this paper include coal mine site 3D geotechnical characterisation methods, surface deep downhole multi-point extensometers and piezometers for overburden displacement and pore pressure measurements during mining, tracer gas tests for goal gas flow patterns, and advanced numerical modelling codes for coupled coal mine strata, water and gas simulations, and longwall goaf gas ttow investigations. This integrated approach has resulted in significant insights into the complex dynamic imeraction between strata, groundwater, and gas during mining at Huainan Mining Group in recent years. Based on the lindings from the extensive field monitoring and numerical modelling studies, a three-dimensional annular-shaped over-lying zone along the perimeter of the longwall panel was identified for optimal methane drainage during mining.

关键词： Co-extraction of coal and gas Strata behaviour Pore pressure Gas flow Annular overlying zone COSFLOW CFD

A Novel Attribute-Based Encryption Approach with Integrity Verification for CAD Assembly Models

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Engineering 2021年第6期7卷 787-797页

作者： Yueting Yang Fazhi He Soonhung Han Yaqian Liang yuan Cheng School of Computer Science Wuhan UniversityWuhan 430072China State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China Division of Ocean Engineering Korea Advanced Institute of Science and TechnologyDaejeon 34141Republic of Korea School of Information Management Wuhan UniversityWuhan 430072China

Cloud manufacturing is one of the three key technologies that enable intelligent *** paper presents a novel attribute-based encryption(ABE)approach for computer-aided design(CAD)assembly models to effectively support hierarchical access control,integrity verification,and deformation protection for co-design scenarios in cloud *** assembly hierarchy access tree(AHAT)is designed as the hierarchical access ***-related ciphertext elements,which are contained in an assembly ciphertext(ACT)file,are adapted for content keys decryption instead of CAD component *** modify the original Merkle tree(MT)and reconstruct an assembly *** proposed ABE framework has the ability to combine the deformation protection method with a content privacy of CAD *** proposed encryption scheme is demonstrated to be secure under the standard *** simulation on typical CAD assembly models demonstrates that the proposed approach is feasible in applications.

关键词： Information security Cloud-based design and manufacture Co-design CAD assembly models Attribute-based encryption

Preparation of Poly(ε-caprolactone)/Poly(ester amide)Electrospun Membranes for Vascular Repair

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Chemical Research in Chinese Universities 2022年第4期38卷 1111-1117页

作者： ZHANG Xiangyu BAI Shan ZANG Leilei CHEN Xiaoqi yuan Xiaoyan School of Materials Science and Engineering Tianjin Key Laboratory of Composite and Functional MaterialsTianjin UniversityTianjin300350P.R.China Institute of Energy Resources Hebei Academy of SciencesShijiazhuang050081P.R.China

With adjustable amphiphilicity and anionic/cationic charge,biodegradability and biocompatibility,amino acid-based poly(ester amide)s(PEAs)have drawn attention in the research of tissue engineered vascular *** this work,L-phenylalanine-based PEAs with or without L-lysine were synthesized through polycondensation,and ultrafine fibrous grafts consisted of PEAs and poly(ε-caprolactone)(PCL)in given mass ratios were further prepared via blend *** characterizations by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy confirmed the chemical structure,and the wettability indicated that the prepared PCL/PEAs electrospun membranes exhibited less hydrophobic than *** results showed that the PCL/PEAs membranes possessed suitable mechanical properties,which could meet the requirements of artificial blood *** culture and hemolytic tests exhibited that the PCL/PEAs electrospun membranes are *** general,the electrospun grafts of PCL/PEAs could be applied for vascular repair.

关键词： Poly(ester amide) Poly(ε-caprolactone) Electrospun membrane Mechanical property Vascular repair

Sphingosine 1-phosphate receptor 1 regulates bloodbrain barrier permeability in epileptic mice

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Neural Regeneration Research 2023年第8期18卷 1763-1769页

作者： Li-Xiang Yang yuan-yuan Yao Jiu-Rong Yang Hui-Lin Cheng Xin-Jian Zhu Zhi-Jun Zhang Department of Neurosurgery Zhongda HospitalSchool of MedicineSoutheast UniversityNanjingJiangsu ProvinceChina Department of Pharmacology Medical School of Southeast UniversityNanjingJiangsu ProvinceChina Department of Neurology Zhongda HospitalSchool of MedicineInstitution of NeuropsychiatryKey Laboratory of Developmental Genes and Human DiseaseSoutheast UniversityNanjingJiangsu ProvinceChina Department of Mental Health and Public Health Faculty of Life and Health SciencesShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenGuangdong ProvinceChina

Destruction of the blood-brain barrier is a critical component of epilepsy *** studies have demonstrated that sphingosine 1-phosphate receptor 1 contributes to the modulation of vascular ***,its effect on blood-brain barrier permeability in epileptic mice remains *** this study,we prepared pilocarpine-induced status epilepticus models and pentylenetetrazol-induced epilepsy models in C57BL/6 mice.S1P1 expression was increased in the hippocampus after status epilepticus,whereas tight junction protein expression was decreased in epileptic mice compared with *** injection of SEW2871,a specific agonist of sphingosine-1-phosphate receptor 1,decreased the level of tight junction protein in the hippocampus of epileptic mice,increased blood-brain barrier leakage,and aggravated the severity of seizures compared with the control.W146,a specific antagonist of sphingosine-1-phosphate receptor 1,increased the level of tight junction protein,attenuated blood-brain barrier disruption,and reduced seizure severity compared with the ***,sphingosine 1-phosphate receptor 1 promoted the generation of interleukin-1βand tumor necrosis factor-αand caused *** of tight junction protein and blood-brain barrier integrity by sphingosine 1-phosphate receptor 1 was reversed by minocycline,a neuroinflammation *** tests revealed that sphingosine 1-phosphate receptor 1 exacerbated epilepsy-associated depression-like ***,specific knockdown of astrocytic S1P1 inhibited neuroinflammatory responses and attenuated blood-brain barrier leakage,seizure severity,and epilepsy-associated depression-like *** together,our results suggest that astrocytic sphingosine 1-phosphate receptor 1 exacerbates blood-brain barrier disruption in the epileptic brain by promoting neuroinflammation.

关键词： adeno-associated virus astrocytes blood-brain barrier epilepsy epilepsy-associated depression-like behavior neuroinflammation pentylenetetrazol pilocarpine tight junction

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Decreasing Trend of Western North Pacific Tropical Cyclone Inner-Core Size over the Past Decades

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Journal of Meteorological Research 2021年第4期35卷 635-645页

作者： Hanrui SHOU Tim LI yuan SUN Lu WANG Jia LIU Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environmental ChangeNanjing University of Information Science&TechnologyNanjing 210044China International Pacific Research Center and Department of Atmospheric Sciences University of Hawaii at ManoaHonoluluHI96822USA College of Meteorology and Oceanography National University of Defense TechnologyNanjing 211101China

Studies on tropical cyclone(TC)inner-core size have become increasingly active in recent ***,few studies have investigated the trend of TC inner-core ***,we introduce a new index to measure TC inner-core size and calculate the observed *** index can greatly reduce the influence of data heterogeneity and *** also considers public concern because the new index is mainly determined by the inner-core size of strong TCs,which attract more public attention than weak *** results show that in the past decades,TC inner-core size has a significant downtrend that is significant above the 99%confidence level when the new index is *** also show that this trend is probably related to the increase in TC intensity and relatively small inner-core size of strong ***,relative sea surface temperature(SST)is assumed to make contributions to the downtrend of TC inner-core size,which has a significant negative correlation with the new index.

关键词： tropical cyclone(TC) inner-core size trend intensity

维普期刊数据库