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产业多样化、技术创新与区域经济韧性

科学管理研究 2024年第4期42卷 53-63页

作者：杨珂凡李亭王志章上海财经大学财经研究所上海200433 上海财经大学金融学院上海200433 西南大学经济管理学院重庆400715

经济韧性增长是新发展阶段区域经济的演化目标。立足于抵抗力和恢复力两个维度,通过反事实分析测度中国各地区在面临突发卫生事件外部冲击时的经济韧性。并进一步基于双循环研究框架,借助空间计量实证检验产业多样化和技术创新对经济韧... 详细信息

经济韧性增长是新发展阶段区域经济的演化目标。立足于抵抗力和恢复力两个维度,通过反事实分析测度中国各地区在面临突发卫生事件外部冲击时的经济韧性。并进一步基于双循环研究框架,借助空间计量实证检验产业多样化和技术创新对经济韧性的驱动作用。研究发现:(1)经济韧性空间分异明显,抵抗力总体呈“中西部地区-长江黄河中游-沿海地区-东北地区”递减分布,高恢复力区域则主要集中在沿海地带,抵抗力和恢复力负向相关;(2)产业多样化和技术创新在塑造区域经济韧性方面发挥了显著驱动作用,同时具有空间溢出效应。此外,当与双循环因素交互后,二者的驱动作用进一步增强。基于对实证结果的综合分析,最后就如何改进韧性表现提出了政策建议。

关键词：产业多样化技术创新经济韧性双循环发展战略突发公共卫生事件

Why Are Arctic Sea Ice Concentration in September and Its Interannual Variability Well Predicted over the Barents–East Siberian Seas by CFSv2?

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Journal of Meteorological Research 2024年第1期38卷 53-68页

作者： Yifan XIE ke fan Hongqing yang School of Atmospheric Sciences Sun Yat-sen Universityand Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 519082

To further understand the prediction skill for the interannual variability of the sea ice concentration(SIC)in specific regions of the Arctic,this paper evaluates the NCEP Climate Forecast System version 2(CFSv2),in predicting the autumn SIC and its interannual variability over the Barents–East Siberian Seas(BES).It is found that CFSv2 presents much better prediction skill for the September SIC over BES than the Arctic as a whole at 1–6-month leads,and high prediction skill for the interannual variability of the SIC over BES is displayed at 1–2-month leads after removing the linear ***2 can reasonably reproduce the relationship between the SIC over BES in September and such factors as the surface air temperature(SAT),200-hPa geopotential height,sea surface temperature(SST),and North Atlantic *** addition,it is found that the prescribed SIC initial condition in August as an input to CFSv2 is also ***,the above atmospheric and oceanic factors,as well as an accurate initial condition of SIC,all contribute to a high prediction skill for SIC over BES in *** on a statistical prediction method,the contributions from individual predictability sources are further *** high prediction skill of CFSv2 for the interannual variability of SIC over BES is largely attributable to its accurate predictions of the SAT and SST,as well as a better initial condition of SIC.

关键词： sea ice concentration the Barents-East Siberian Seas Climate Forecast System version 2(CFSv2) prediction skill predictability source atmospheric and oceanic factors initial condition

EFFECT OF MICROSTRUCTURE ON MECHANICAL PROPERTIES OF INCOLOY 907

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Acta Metallurgica Sinica(English Letters) 1992年第4期5卷 245-249页

作者： XIE Yun yang ke ZHAO Xu fan Cungan LI Yiyi Institute of Metal Research,Academia Sinica,Shenyang,China Inst of Metal Research Acad Sinica Shenyang China

Effect of microstructure on the mechanical properties of a precipitation strengthening Fe-Ni-Co based low expansion alloy,Incoloy *** been investigated under different heat *** dispersed γ-phase is found to be the principal strengthening phase in the *** microstructure of the alloy with even dispersed fine γ′-phase seems to have the best mechanical ***,it will be worsened if the alloy was aged at some higher tem- perature or overaged to precipitate needle-like ε-phase.

关键词： precipitation strengthening austenite alloy microstructure mechanical property Incoloy 907

Age of Information Based User Scheduling and Data Assignment in Multi-User Mobile Edge Computing Networks:An Online Algorithm

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China Communications 2024年第5期21卷 153-165页

作者： Ge Yiyang Xiong ke Dong Rui Lu yang fan Pingyi Qu Gang School of Computer and Information Technology Beijing Jiaotong UniversityBeijing 100044China Engineering Research Center of Network Management Technology for High Speed Railway of Ministry of Education Beijing 100044China Beijing Engineering Research Center of High-speed Railway Broadband Mobile Communications Beijing 100044China Department of Electronic Engineering Tsinghua UniversityBeijing 100084China Beijing National Research Center for Information Science and Technology Tsinghua UniversityBeijing 100084China Department of Electrical and Computer Engineering College ParkMarylandUSA

This paper investigates the age of information(AoI)-based multi-user mobile edge computing(MEC)network with partial offloading *** weighted sum AoI(WSA)is first analyzed and derived,and then a WSA minimization problem is formulated by jointly optimizing the user scheduling and data *** to the non-analytic expression of the WSA *** optimization variables and the unknowability of future network information,the problem cannot be solved with known solution ***,an online Joint Partial Offloading and User Scheduling Optimization(JPOUSO)algorithm is proposed by transforming the original problem into a single-slot data assignment subproblem and a single-slot user scheduling sub-problem and solving the two sub-problems *** analyze the computational complexity of the presented JPO-USO algorithm,which is of O(N),with N being the number of *** results show that the proposed JPO-USO algorithm is able to achieve better AoI performance compared with various baseline *** is shown that both the user’s data assignment and the user’s AoI should be jointly taken into account to decrease the system WSA when scheduling users.

关键词： age of information(aoi) mobile edge computing(mec) user scheduling

Different gap junction-propagated effects on cisplatin transfer result in opposite responses to cisplatinin normal cells versus tumor cells

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中国药理学与毒理学杂志 2016年第10期30卷 1076-1077页

作者： ZHANG Yuan WANG Qin fan Li-xia PENG Yue-xia yang ke-fan ZHAO Yi-fan SONG Qi TAO Liang Department of Pharmacology Zhongshan School of MedicineSun Yat-Sen University

OBJECTIVE Previous work has shown that gap junction intercel ular communication(GJIC)enhances cisplatin(Pt)toxicity in testicular tumor cells but decreases it in non-tumor testicular *** this study,these different GJIC-propagated effects were demonstrated in tumor versus non-tumor cells from other organ tissues(liver and lung).METHODS We use several different mani pulations(no cell contact,pharmacological inhibition,and si RNA suppression)to down-regulate GJIC *** in vivo results using xenograft tumor models were consistent with those from the above-mentioned *** better understand the mechanism(s)involved,we studied the effects of GJIC on Pt accumulation in tumor and non-tumor cells from the liver and *** The intracel ular Pt and DNA-Pt adduct contents clearly increased in non-tumor cells but decreasedin tumor cells when GJIC was *** analysis indicated that the opposite effectsof GJIC on Pt accumulation in normal versus tumor cells from the liver were due to its different effects on copper transporter1 and multidrug resistance-associated protein2,membrane transporters attributed to intracellular Pt *** GJIC protects normal organs from cisplatin toxicity while enhancing it in tumor cells via its different effects on intracellular Pt transfer.

关键词： tumor cells non-tumor cells GJIC cisplatin copper transporter 1 multidrug resistance-associated protein 2

Enhanced Ion-Selective Diffusion Achieved by Supramolecular Interaction for High Thermovoltage and Thermal Stability

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Energy & Environmental Materials 2024年第2期7卷 200-208页

作者： Jiale ke Xing Zhao Jie yang Kai ke Yu Wang Mingbo yang Wei yang College of Polymer Science and Engineering Sichuan UniversityState Key Laboratory of Polymer Materials EngineeringChengdu 610065China

Thermoelectric(TE)generators capable of converting thermal energy into applicable electricity have gained great popularity among emerging energy conversion ***-based ionic thermoelectric(i-TE)materials are promising candidates for energy conversion systems because of their wide sources,innocuity,and low manufacturing ***,common physically crosslinked biopolymer gels induced by single hydrogen bonding or hydrophobic interaction suffer from low differential thermal voltage and poor thermodynamic ***,we develop a novel i-TE gel with supramolecular structures through multiple noncovalent interactions between ionic liquids(ILs)and gelatin molecular *** thermopower and thermoelectric power factor of the ionic gels are as high as 2.83 mV K-1 and 18.33μW m^(-1)K^(-2),*** quasi-solid-state gelatin-[EMIM]DCA i-TE cells achieve ultrahigh 2 h output energy density(E_(2h)=9.9 mJ m^(-2))under an optimal temperature ***,the remarkable stability of the supramolecular structure provides the i-TE hydrogels with a thermal stability of up to 80℃.It breaks the limitation that biopolymer-based i-TE gels can only be applied in the low temperature range and enables biopolymer-based i-TE materials to pursue better performance in a higher temperature range.

关键词： biopolymer gel ionic liquid multiple noncovalent interactions supramolecular structure thermoelectric conversion

Processing,microstructure,and properties of porous ceramic composites with directional channels

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Journal of Materials Science & Technology 2024年第1期168卷 1-15页

作者： Bo Zhang yang yang Xueling fan key Laboratory of Service Performance and Protection Technology in Extreme Environments Xi’an Jiaotong UniversityXi’an 710049China State key Laboratory for Strength and Vibration of Mechanical Structures School of Aerospace EngineeringXi’an Jiaotong UniversityXi’an 710049China

Porous ceramic composites with directional microchannels from micrometer to dozens of micrometer levels have attracted more and more attention in various fields including aerospace,biomedicines,and thermal insulation due to their excellent fluid permeability,mechanical properties,*** this article,we summarize the recent directional porous ceramics developments including their main processing routes and respective ***,the properties get from different processing routes have been com-pared and analyzed in terms of microstructures,mechanical properties,and *** has been given to the deeper understanding which can allow one to control the microstructural features of these porous ceramic composites to obtain the desired *** work can provide a useful reference for the development and application of porous ceramic composites with directional microchan-nels.

关键词： Porous ceramic composites Directional microchannels Processing routes Permeability

Love wave propagation in one-dimensional piezoelectric quasicrystal multilayered nanoplates with surface effects

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Applied Mathematics and Mechanics(English Edition) 2024年第4期45卷 619-632页

作者： Xin FENG Liaoliang ke yang GAO College of Science China Agricultural UniversityBeijing 100083China School of Mechanical Engineering Tianjin UniversityTianjin 300350China

The exact solutions for the propagation of Love waves in one-dimensional(1D)hexagonal piezoelectric quasicrystal(PQC)nanoplates with surface effects are *** electro-elastic model is developed to investigate the anti-plane strain problem of Love wave *** introducing three shape functions,the wave equations and electric balance equations are decoupled into three uncorrelated *** the boundary conditions of the top surface on the covering layer,the interlayer interface,and the matrix,a dispersive equation with the influence of multi-physical field coupling is provided.A surface PQC model is developed to investigate the surface effects on the propagation behaviors of Love waves in quasicrystal(QC)multilayered structures with nanoscale thicknesses.A novel dispersion relation for the PQC structure is derived in an explicit closed form according to the non-classical mechanical and electric boundary *** examples are given to reveal the effects of the boundary conditions,stacking sequence,characteristic scale,and phason fluctuation characteristics on the dispersion curves of Love waves propagating in PQC nanoplates with surface effects.

关键词： piezoelectric quasicrystal(PQC)material multilayered plate dispersion characteristic surface effect

Construction of millimeter-scale vascularized engineered myocardial tissue using a mixed gel

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Regenerative Biomaterials 2024年第3期3卷 56-67页

作者： Ming ke Wenhui Xu Yansha Hao Feiyang Zheng Guanyuan yang Yonghong fan fangfang Wang Zhiqiang Nie Chuhong Zhu Department of Anatomy Third Military Medical UniversityChongqing 400038China State key Laboratory of Trauma Burn and Combined InjuryChongqing 400038China Department of Plastic and Aesthetic Surgery Southwest HospitalThird Military Medical UniversityChongqing 400038China Engineering Research Center of Tissue and Organ Regeneration and Manufacturing Ministry of EducationChongqing 400038China

Engineering myocardium has shown great clinal potential for repairing permanent myocardial ***,the lack of perfusing blood vessels and difficulties in preparing a thick-engineered myocardium result in its limited clinical *** prepared a mixed gel containing fibrin(5 mg/ml)and collagen I(0.2 mg/ml)and verified that human umbilical vein endothelial cells(HUVECs)and human-induced pluripotent stem cell-derived cardiomyocytes(hiPSC-CMs)could fom microvascular lumens and myocardial cell clusters by harnessing the low-hardness and hyperelastic characteristics of ***-CMs and HUVECs in the mixed gel formed self-organized cell clusters,which were then cultured in different media using a three-phase *** successfully constructed vascularized engineered myocardial tissue had a spherical structure and final diameter of *** tissue exhibited autonomous beats that occured at a frequency similar to a normal human heart *** internal microvascular lumen could be maintained for 6 weeks and showed good results during preliminary surface re-vascularization in vitro and vascular remodeling in *** summary,we propose a simple method for constructing vascularized engineered myocardial tissue,through phased cultivation that does not rely on high-end manufacturing equipment and cutting-edge preparation *** constructed tissue has potential value for clinical use after preliminary evaluation.

关键词： engineered myocardium vascularized hiPSC-CM HUVEC fibrin