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Changes in global land surface frozen ground and freeze-thaw processes during 1950-2.2. based on ERA5-Land data

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Advances in Climate Change Research 2024年第2期15卷 265-274页

作者： yong YANG Ren-Sheng chen yong-Jian ding Hong-Yuan LI Zhang-Wen LIU Qilian Alpine Ecology and Hydrology Research Station Key Laboratory of Ecological Safety and Sustainable Development in Arid LandsNorthwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 73000China State Key Laboratory of Cryospheric sciences Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 73000China Shandong Provincial Key Laboratory of Water and Soil Conservation and Environmental Protection College of Resources and EnvironmentLinyi UniversityLinyi 276000China

Frozen ground(FG)plays an important role in global and regional climates and environments through changes in land freeze-thaw processes,which have been conducted mainly in different ***,the changes in land surface freeze-thaw processes under climate change on a global scale are still *** on ERA5-Land hourly land skin temperature data,this study evaluated changes in the global FG area,global land surface first freeze date(FFD),last freeze date(LFD)and frost-free period(FFP)from 1950 to *** results show that the current FG areas(1991-2.2. mean)in the Northern Hemisphere(NH),Southern Hemisphere(SH),and globe are 68.50×10^(6),9.03×10^(6),and 77.53×10^(6)km^(2.,which account for 72.4%,2..8%,and 60.4%of the exposed land(excluding glaciers,ice sheets,and water bodies)in the NH,SH and the globe,respectively;further,relative to 1951-1980,the FG area decreased by 1.9%,8.8%,and 2.8%,*** FG at lower latitudes degrades to intermittently FG,and intermittently FG degrades to non-frozen ground,which caused the global FG boundary to retreat to higher latitudes from 1950 to *** annual FG areas in the NH,SH,and globe all show significant decreasing trends(p1950 to 2.2. at-0.32.10^(6),-0.2.×10^(6),and-0.54×10^(6)km^(2.per decade,*** FFP prolongation in the NH is mainly influenced by LFD advance,while in the SH it is mainly controlled by FFD *** prolongation trend of FFP in the NH(1.34 d per decade)is larger than that in the SH(1.15 d per decade).

关键词： Frozen ground Freeze-thaw processes Frost-free period First freeze date Global warming

GA-LSTM speed prediction-based DDQN energy management for extended-range vehicles

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Energy and AI

Energy and AI 2024年第3期17卷 11-28页

作者： Laiwei Lu Hong Zhao Fuliang Xv yong Luo Junjie chen Xiaoyun {2. College of Mechanical and Electrical Engineering Qingdao UniversityQingdao266071Shandong ProvinceChina

In this paper,a dual deep Q-network(DDQN)energy management model based on long-short memory neural network(LSTM)speed prediction is proposed under the model predictive control(MPC)*** initial learning rate and neuron dropout probability of the LSTM speed prediction model are optimized by the genetic algorithm(GA).The prediction results show that the root-mean-square error of the GA-LSTM speed prediction method is smaller than the SVR method in different speed prediction *** predicted demand power,the state of charge(SOC),and the demand power at the current moment are used as the state input of the agent,and the real-time control of the control strategy is realized by the MPC *** simulation results show that the proposed control strategy reduces the equivalent fuel consumption by 0.0354 kg compared with DDQN,0.8439 kg compared with ECMS,and 0.742.kg compared with the power-following control *** difference between the proposed control strategy and the dynamic planning control strategy is only 0.0048 kg,0.193%,while the SOC of the power battery remains ***,the hardware-in-the-loop simulation verifies that the proposed control strategy has good real-time performance.

关键词： Extended-range vehicle LSTM speed prediction Genetic algorithm Model predictive control(MPC) Deep reinforcement learning Double deep Q-network(DDQN)

Diversification of interfaces triggered hydrogen storage properties enhancement

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Rare Metals 2024年第5期43卷 2324-2330页

作者： Jia-Xin Zhang Xin ding Rui-Run chen Xiang-Feng Ma Wen-Chao Cao {2. Zhang Jing-Jie Guo National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of TechnologyHarbin 150001China

Dual effects of grain refinement and alloying are achieved and the mechanism of"diverse interfaces reinforcement"for hydrogen storage Mg alloys is first *** interface reinforced Mg-Y-Zn-Al alloy for hydrogen storage is *** work figures out that the adventurous Al-rich phase exhibits an ordered face-centered cubic(FCC)structure with composition of(31±2.at%Y-(2.±1)at%Zn-(41±3)at%Al,i.e.,Y_(3)Zn_(3)Al_(4),and an incoherent interface between Y3Zn3Al4phase and Mg substrate is observed.

关键词： hydrogen alloying alloy

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Genomic profiling of colorectal cancer in large-scale Chinese patients:amplification and somatic mutations in ERBB2

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Oncology Research 2024年第9期32卷 1429-1438页

作者： YUZHI LIU EVELYNE BISCHOF ZHIQIN chen JIAHUAN ZHOU BEI ZHANG ding ZHANG {2. GAO MING QUAN department of Oncology Shanghai East HospitalTongji University School of MedicineShanghaiChina State Key Laboratory of Oncogenes and Related Genes Shanghai Cancer InstituteDepartment of OncologyRenji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina Jiangsu Hengrui Pharmaceuticals Co. Ltd.ShanghaiChina D Medicines Inc. ShanghaiChina

Objectives:Human epidermal growth factor receptor 2.HER2.-targeted therapies have demonstrated potential benefits for metastatic colorectal cancer(mCRC)patients with HER2.amplification,but are not satisfactory in cases of HER2.mutant ***:Consequently,further elucidation of amplifications and somatic mutations in erythroblastic oncogene B-2.ERBB2.is *** genomic profiling was conducted on 2.54 Chinese CRC cases to evaluate genomic alterations in 733 cancer-related genes,tumor mutational burden,microsatellite instability,and programmed death ligand 1(PD-L1)***:Among 2.54 CRC patients,85 cases(3.46%)exhibited ERBB2.amplification,and 55 cases(2.2.%)carried ERBB2.mutation.p.R678Q(2.%),p.V842.(2.%),and p.S310F/Y(12.)were the most prevalent of the 16 detected mutation *** comparison to the ERBB2.altered(alt)group,KRAS/BRAF mutations were more prevalent in ERBB2.wild-type(wt)samples(ERBB2.t ***2.lt,KRAS:50.9%vs.2..6%,p2.3%,p2.7%(18/55)of CRCs with ERBB2.mutation exhibited microsatellite instability high(MSI-H),while no cases with HER2.amplification displayed *** genes varied between ERBB2.copy number variation(CNV)and ERBB2.single nucleotide variant(SNV);TP53 alterations tended to co-occur with ERBB2.amplification(92.3%)as opposed to ERBB2.mutation(58.3%).KRAS and PIK3CA alterations were more prevalent in ERBB2.SNV cases(KRAS/PIK3CA:45.8%/31.2.)compared to ERBB2.amplification cases(KRAS/PIK3CA:14.1%/7.7%).Conclusion:Our study delineates the landscape of HER2.alterations in a large-scale cohort of CRC patients from *** fin{2.s enhance our understan{2. of the molecular features of Chinese CRC patients and offer valuable implications for further investigation.

关键词： Colorectal cancer ERBB2 HER2 Human epidermal growth factor receptor 2 Genetic profiling Precision oncology

Modification of BCC phase and the enhanced reversible hydrogen storage properties of Ti-V-Fe-Mn alloys with varied V/Fe ratios

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china Foundry 2024年第5期21卷 546-554页

作者： Xiang-feng Ma Xin ding En-lai Liu Rui-run chen Xin-xiu Wang {2. Zhang and Jing-jie Guo National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of TechnologyHarbin 150001China School of Materials science and Engineering Shandong University of Science and TechnologyQingdao 266500ShandongChina AECC Harbin Dongan Engine Co.Ltd.Harbin 150001China

Ti-V-based alloys are proved of huge potential in storing hydrogen,but the incomplete reversible hydrogen storage capacity caused by overstability of V hydride has limited the large-scale *** this study,Ti_(32.V_(40+x)Fe_(2.-x)Mn_(5)(x=0,4,8,12.at.%)alloys were designed,and the effects of V/Fe ratio on phase constitution and hydrogen storage properties were *** main phase of the alloys is body-centered cubic(BCC)phase,and the lattice constants of the BCC phase decrease with the decrease of V/Fe ***,C14 Laves phase exists in alloys with a Fe content of 19at.%to 2.at.%.For hydrogenation,the C14 Laves phase can accelerate the hydrogen absorption rate,but the hydrogen absorption capacity is *** the decrease of V/Fe ratio,the hydride gradually *** to its large lattice constant and high hydrogen absorption phase content,the Ti_(32.V_(52.Fe_(11)Mn_(5)alloy shows the most enhanced hydrogen storage properties with hydrogenation and dehydrogenation capacities of 3.588wt.%at 2.8 K and 1.688wt.%at 343 K,*** hydrogen absorption capacity of this alloy can be reserved to 3.574wt.%after 2. cycles of hydrogen absorption and desorption.

关键词： hydrogen storage Ti-based alloy lattice constant BCC phase

High-Performance All-Printed Flexible Micro-Supercapacitors with Hierarchical Encapsulation

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Energy & Environmental Materials 2024年第4期7卷 262-268页

作者： Yuhang Yuan Wei Yuan Yaopeng Wu Xuyang Wu Xiaoqing Zhang Simin Jiang Bote Zhao Yu chen chenghao Yang Liangxin {2. Zhenghua Tang Yingxi Xie yong Tang School of Mechanical & Automotive Engineering South China University of Technology School of Environment and Energy South China University of Technology School of Chemistry and Chemical Engineering South China University of Technology

Printed micro-supercapacitors (MSCs) have shown broad prospect in flexible and wearable *** of previous studies focused on printing the electrochemically active materials paying less attention to other key components like current collectors and *** study presents an allprinting strategy to fabricate in-plane flexible and substrate-free MSCs with hierarchical encapsulation.

关键词： all-printing flexible hierarchical encapsulation micro-supercapacitors substrate-free

Multidimensional regulation of Ti-Zr-Cr-Mn hydrogen storage alloys via Y partial substitution

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Nano Research 2024年第5期17卷 4211-4220页

作者： Haixiang Xiu Wanqiang Liu Dongming Yin Nan ding Wenfeng Qiao Shaolei Zhao Long Liang Cong Liu Shaohua Wang Qingshuang Wang Bingbing chen Limin Wang {2. cheng School of Materials science and Engineering Changchun University of Science and TechnologyChangchun 130022China State Key Laboratory of Rare Earth Resources Utilization Changchun Institute of Applied ChemistryChinese Academy of Sciences(CAS)Changchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China department of Energy science and Engineering Nanjing Tech UniversityNanjing 211816China National Engineering Research Center of Nonferrous Metals Materials and Products for New Energy GRINM Group Co.Ltd.Beijing 100088China GRIMAT Engineering Institute Co. Ltd.Beijing 101407China College of Life science and technology Changchun University of Science and TechnologyChangchun 130022China

High density and safe storage of hydrogen are the preconditions for the large-scale application of hydrogen ***,the hydrogen storage properties of Ti_(0.6)Zr_(0.4)Cr_(0.6)Mn_(1.4) alloys are systematically studied by introducing Y element instead of Ti element through vacuum arc *** the partial substitution of Y,a second phase of rare earth oxide is added in addition to the main suction hydrogen phase,C14 Laves *** to the unique properties of rare earth elements,the partial substitution of Y can not only improve the activation properties and plateau pressure of the alloys,but also increase the effective hydrogen storage capacity of the *** comprehensive properties of hydrogen storage alloys are improved by multidimensional regulation of rare earth *** them,Ti_(0.552.Y_(0.048)Zr_(0.4)Cr_(0.6)Mn_(1.4) has the best comprehensive *** alloy can absorb hydrogen without activation at room temperature and 5 MPa,with a maximum hydrogen storage capacity of 1.98 wt.%.At the same time,it reduces the stability of the hydride and the enthalpy change value,making it easier to release *** theoretical analysis and first-principle simulation,the results show that the substitution of Y element reduces the migration energy barrier of hydrogen and the structural stability of the system,which is conducive to hydrogen *** alloy has superior durability compared to the original alloy,and the capacity retention rate was 96.79%after 100 hydrogen absorption/desorption cycles.

关键词： AB_(2.-type hydrogen storage alloy rare earth element first-principles simulation multidimensional regulation

Alterations of sleep deprivation on brain function:A coordinatebased resting-state functional magnetic resonance imaging metaanalysis

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World Journal of Psychiatry 2024年第2期14卷 315-329页

作者： Qin Zhang yong-Zhe Hou Hui ding Yan-Ping Shu Jing Li Xi-Zhao {2. Jia-Lin Li Qin Lou Dai-Xing Wang department of Radiology The Second People’s Hospital of Guizhou ProvinceGuiyang 550000Guizhou ProvinceChina department of Radiology Guizhou Provincial People’s HospitalGuiyang 550000Guizhou ProvinceChina department of Psychiatry of Women and Children The Second People’s Hospital of Guizhou ProvinceGuiyang 550000Guizhou ProvinceChina Medical Humanities College Guizhou Medical UniversityGuiyang 550000Guizhou ProvinceChina

BACKGROUND Sleep deprivation is a prevalent issue that impacts cognitive *** numerous neuroimaging studies have explored the neural correlates of sleep loss,inconsistencies persist in the reported results,necessitating an investigation into the consistent brain functional changes resulting from sleep *** To establish the consistency of brain functional alterations associated with sleep deprivation through systematic searches of neuroimaging *** metaanalytic methods,signed differential mapping(SDM)and activation likelihood estimation(ALE),were employed to analyze functional magnetic resonance imaging(fMRI)*** A systematic search performed according to PRISMA guidelines was conducted across multiple databases through July 2.,*** that met specific inclusion criteria,focused on healthy subjects with acute sleep deprivation and reported whole-brain functional data in English were considered.A total of 2. studies were selected for SDM and ALE *** Twenty-one studies,including 2. experiments and 498 subjects,were *** to pre-sleep deprivation,post-sleep deprivation brain function was associated with increased gray matter in the right corpus callosum and decreased activity in the left medial frontal gyrus and left inferior parietal *** revealed increased brain functional activity in the left striatum and right central posterior gyrus and decreased activity in the right cerebellar gyrus,left middle frontal gyrus,corpus callosum,and right *** This meta-analysis consistently identified brain regions affected by sleep deprivation,notably the left medial frontal gyrus and corpus callosum,shedding light on the neuropathology of sleep deprivation and offering insights into its neurological impact.

关键词： Sleep deprivation Resting-state-functional magnetic resonance imaging Activation likelihood estimation-meta Signed differential mapping-meta

Variational inequalities for the commutators of rough operators with BMO functions

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science china {2. 2021年第11期64卷 2437-2460页

作者： yanping chen {2. ding Guixiang Hong Honghai Liu department of Applied mathematics School of Mathematics and PhysicsUniversity of Science and Technology BeijingBeijing 100083China School of Mathematical sciences Beijing Normal UniversityLaboratory of Mathematics and Complex Systems(BNU)Ministry of EducationBeijing 100875China School of mathematics and Statistics Wuhan UniversityWuhan 430072China School of mathematics and Information science Henan Polytechnic UniversityJiaozuo 454003China

Starting with the relatively simple observation that the variational estimates of the commutators of the standard Calderón-Zygmund operators with the bounded mean oscillation(BMO)functions can be obtained from their weighted variational estimates,we establish the similar variational estimates for the commutators of the BMO functions with rough singular integrals,which do not admit any weighted variational *** proof involves several Littlewood-Paley-type inequalities with the commutators as well as Bony decomposition and related para-product estimates.

关键词： commutator variational inequality singular integral averaging operator rough kernel

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