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The 2022 record-breaking high temperature in China:Sub-seasonal stepwise enhanced characteristics,possible causes and its predictability

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Advances in Climate Change Research 2023年第5期14卷 651-659页

作者： Yuan-Yuan ma Yi-Ting CHEN Xiao-Xue HU Qian-rong ma Tai-Chen FENG Guo-Ling FENG Di ma Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China School of Physical Science and Technology Yangzhou UniversityYangzhou 225127China College of Atmospheric Sciences Lanzhou UniversityLanzhou 730000China School of Atmospheric Sciences Key Laboratory of Tropical Atmosphere-Ocean SystemMinistry of EducationSun Yat-sen UniversityZhuhai 519082China Southern marine Science and Engineering Guangdong Laboratory Zhuhai 519082China

In the summer of 2022,an unprecedented and long-lasting high temperature swept central-eastern China,causing significant societal ***,the sub-seasonal characteristics,causes and predictability of this extreme high temperature event are not well *** on the locations,intensities and causes of the high temperature,we divided it into three stages:early(13 June-3 July),sustained(4-28 July),and enhancement(29 July-30 August)*** high temperature during the early stage mainly occurred in north-central China with an anomaly of 2.5℃compared with climatology(1981-2010),while the last two stages occurred in the middle and lower Yangtze River Basin with anomalies of 2.8 and 3.8℃*** high temperature during the three stages were all regulated by the strengthening and westward extension of the western Pacific subtropical high(WPSH)but involved different physical *** the early stage,it was mainly caused by the anticyclones over the Mongolia and Northwest Pacific and enhanced by the minor impact of *** the sustained stage it was influenced by relatively more stronger WPSH and South Asia high(SAH)and the relatively minor impact of the anticyclone over the north-western South *** the enhancement stage,the high temperature was mainly caused by a combination of the record-breaking WPSH and SAH and the strong European blocking ***,the exceptionally powerful WPSH was well correlated with the sea surface temperature gradient induced by the developing La Niñ*** ECMWF and NCEP models reasonably predicted the location and intensity of the high temperature in the early stage,but poorly predicted that in the sustained and enhancement stages partly because of the failure prediction of the WPSH's enhancement and westward *** ECMWF model's more accurate prediction of the WPSH may contribute to its better forecasting of the heatwaves.

关键词： High temperature Sub-seasonal characteristics Western Pacific subtropical high La Niña development phase Predictability

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Patterns and drivers of plant sexual systems in the dry-hot valley region of southwestern China

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Plant Diversity 2024年第2期46卷 158-168页

作者： rong ma Qi Xu Yongqian Gao Deli Peng Hang Sun Bo Song State Key Laboratory of Plant Diversity and Specialty Crops/Yunnan Key Laboratory for Integrative Conservation of Plant Species with Extremely Small Populations Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China College of Life Sciences Shaanxi Normal UniversityXi'an 710119China Yunnan Forestry Technological College Kunming 650224China School of Life Science/Key Laboratory of Yunnan for Biomass Energy and Biotechnology of Environment Yunnan Normal UniversityKunming 650500YunnanChina

Sexual systems play important roles in angiosperm evolution and exhibit substantial variations among different floras. Thus, studying their evolution in a whole flora is crucial for understanding the formation and maintenance of plant biodiversity and predicting its responses to environmental change. In this study, we determined the patterns of plant sexual systems and their associations with geographic elements and various life-history traits in dry-hot valley region of southwestern China, an extremely vulnerable ecosystem. Of the 3166 angiosperm species recorded in this area, 74.5% were hermaphroditic,13.5% were monoecious and 12% were dioecious, showing a high incidence of diclinous species. Diclinous species were strongly associated with tropical elements, whereas hermaphroditic species were strongly associated with temperate and cosmopolitan elements. We also found that hermaphroditism was strongly associated with showy floral displays, specialist entomophily, dry fruits and herbaceous *** was strongly associated with inconspicuous, pale-colored flowers, generalist entomophily, fleshy fruits, and woody plants, whereas monoecy was strongly associated with inconspicuous, pale-colored flowers, anemophily, dry fruits, and herbaceous plants. In addition, hermaphroditic species with generalist entomophily tended to flower in the dry season, whereas diclinous species with specialist entomophily tended to flower in the rainy season. However, independent of sexual systems, plants that produce dry fruits tended to flower in the rainy season and set fruits in the dry season, but the opposite pattern was found for fleshy fruit-producing plants. Our results suggest that in the dry-hot valleys, plant sexual systems are associated with geographic elements as well as various life-history traits that are sensitive to environmental change.

关键词： Floral traits Fruit type Growth form Pollination system Reproductive phenology

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NOma-Based Energy-Efficient Task Scheduling in Vehicular Edge Computing Networks: A Self-Imitation Learning-Based Approach

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China Communications 2020年第11期17卷 1-11页

作者： Peiran Dong Zhaolong Ning rong ma Xiaojie Wang Xiping Hu Bin Hu School of Information Science and Engineering Lanzhou UniversityLanzhou 730000China National Mobile Communications Research Laboratory Southeast UniversityNanjing 210096China School of Software Dalian University of TechnologyDalian 116620China School of Communication and Information Engineering Chongqing University of Posts and TelecommunicationsChongqing 400065China

Mobile Edge Computing(MEC)is promising to alleviate the computation and storage burdens for terminals in wireless *** huge energy consumption of MEC servers challenges the establishment of smart cities and their service time powered by rechargeable *** addition,Orthogonal Multiple Access(Oma)technique cannot utilize limited spectrum resources fully and ***,Non-Orthogonal Multiple Access(NOma)-based energy-efficient task scheduling among MEC servers for delay-constraint mobile applications is important,especially in highly-dynamic vehicular edge computing *** various movement patterns of vehicles lead to unbalanced offloading requirements and different load pressure for MEC ***-Imitation Learning(SIL)-based Deep Reinforcement Learning(DRL)has emerged as a promising machine learning technique to break through obstacles in various research fields,especially in time-varying *** this paper,we first introduce related MEC technologies in vehicular ***,we propose an energy-efficient approach for task scheduling in vehicular edge computing networks based on DRL,with the purpose of both guaranteeing the task latency requirement for multiple users and minimizing total energy consumption of MEC *** results demonstrate that the proposed algorithm outperforms other methods.

关键词： NOma energy-efficient scheduling vehicular edge computing imitation learning

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Numerical simulation on modulational instability of ion-acoustic waves in plasma

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Chinese Physics B 2019年第2期28卷 341-345页

作者： Yi-rong ma Lie-Juan Li Wen-Shan Duan Center for Quantum Technology Research School of PhysicsBeijing Institute of Technology College of Physics and Electronic Engineering Joint Laboratory of Atomic and Molecular Physics of NWNU&IMP CASNorthwest Normal University

In this paper, the one-dimensional(1D) particle-in-cell(PIC) simulation is used to study the modulation instability of ion acoustic waves in electron–ion plasmas. The ion acoustic wave is described by using a nonlinear Schr¨odinger equation(NLSE) derived from the reductive perturbation method. Form our numerical simulations, we are able to demonstrate that,after the modulation, the amplitude increases steadily over time. Furthermore, by comparing the numerical results with traditional analytical solutions, we acquire the application scope for the reductive perturbation method to obtain the *** also find this method can also be extended to other fields such as fluid dynamics, nonlinear optics, solid state physics,and the Bose–Einstein condensate to validate the application scope of the results from the traditional perturbation method.

关键词： modulational instability particle-in-cell simulation the reductive perturbation method

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FLOW OF OLDROYD-B FLUID IN ROTATING CURVED SQUARE DUCTS

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Journal of Hydrodynamics 2007年第1期19卷 36-41页

作者： ZHANG Ming-kan SHEN Xin-rong ma Jian-feng ZHANG Ben-zhao Institute of Fluid Engineering Zhejiang University Hangzhou 310027 China

The fully developed Oldroyd-B fluid flow through rotating square ducts was numerically studied. The effects of the rotation on secondary flow, axial velocity, and axial normal stress were examined in detail. The results indicated that all of the secondary flow, the axial flow, and the axial normal stress were evidently affected by the rotation. The Taylor-Proudman phenomenon could be observed in the flow. For the secondary flow, the four vortices structure and the six vortices structure were described. Recent studies also showed the effects of rotation on the axial normal stress.

关键词： curved ducts Oldroyd-B fluid rotating axialnormal stress

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Recent advances in visible light-mediated chemical transformations of enaminones

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Chinese Chemical Letters 2024年第2期35卷 4-15页

作者： Yu Han Liyun Zhou Chengyu Wang Shangti Feng rong ma Jie-Ping Wan College of Chemistry and Chemical Engineering Jiangxi Normal UniversityNanchang 330022China School of Chemistry and Chemical Engineering Linyi UniversityLinyi 276000China Linyi Sanfeng Chemical Co. Ltd.Linyi 276000China

Enaminones,which possesses both the nucleophilic enamine as well as electrophilic enone structures,are well known versatile building blocks in organic ***,visible light-mediated reactions have emerged as useful synthetic strategy with enhanced *** the last decade,various photochemical transformations of enaminones have been developed to construct cyclic or acyclic *** this review,we describe the recent advances in visible light-mediated chemical transformations of *** discussion on the reaction mechanism of the related reactions is given to provide guide to the ***,a summary on the existing challenges and the future outlook towards the development of practical photocatalytic reactions of enaminones is also presented.

关键词： Enaminone Visible light C-H functionalization C=C bond cleavage Cyclization Multicomponent reactions

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Jasmonic acid and ethylene signaling pathways participate in the defense response of Chinese cabbage to Pectobacterium carotovorum infection

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Journal of Integrative Agriculture 2021年第5期20卷 1314-1326页

作者： CHEN Chang-long YUAN Fang LI Xiao-ying ma rong-cai XIE Hua Beijing Agro-Biotechnology Research Center Beijing Academy of Agriculture and Forestry SciencesBeijing 100097P.R.China Beijing Key Laboratory of Agricultural Genetic Resources and Biotechnology Beijing 100097P.R.China

Chinese cabbage(Brassica rapa ***)suffers from soft rot disease caused by Pectobacterium carotovorum(Pc).To uncover the mechanisms underlying the defense response of Chinese cabbage to Pc,we constructed a suppression subtractive hybridization(SSH)library from Pc-infected cabbage and obtained 1919 non-redundant expressed sequence tags(ESTs),which were used for cDNA *** detected 800 differentially expressed genes(DEGs)in cabbage at different time points post-Pc inoculation,which were further confirmed by quantitative real-time *** quarter of these DEGs were involved in the biotic stress pathways visualized by *** them,8,8,1,3,and 2 DEGs were related to jasmonic acid(JA),ethylene(ET),JA+ET,auxin,and abscisic acid(ABA)signaling pathways,respectively,while no DEG was detected for salicylic acid(SA)*** of phytohormone production in the Pc-infected leaves showed that JA and ET production was increased,while SA production was *** with JA,methyl jasmonate(MeJA),the ET precursor 1-aminocyclopropane-1-carboxylate(ACC),or combinations thereof,reduced the disease severity,and the JA and JA+ACC treatments were superior and performed equally *** findings suggest that JA and ET may act synergistically against Pc infection in Chinese cabbage,and JA-mediated signaling might be the most significant.

关键词： Brassica rapa Pectobacterium carotovorum gene expression defense response hormone signaling

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Does pollinator dependence decrease along elevational gradients?

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Plant Diversity 2023年第4期45卷 446-455页

作者： Yue-Wen Xu Lu Sun rong ma Yong-Qian Gao Hang Sun Bo Song CAS Key Laboratory for Plant Diversity and Biogeography of East Asia/Yunnan Key Laboratory for Integrative Conservation of Plant Species with Extremely Small Populations Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China College of Life Sciences Shaanxi Normal UniversityXi'an 710119China Yunnan Forestry Technological College Kunming 650224China

Plants have long been thought to be less dependent on pollinators for seed production at higher elevations due to adverse pollination ***,recent research has yet to consistently support the generality of this *** this study,we asked whether pollinator dependence decreases along an elevational gradient and how it varies with various reproductive *** answer these questions,we quantified pollinator-plant associations and various reproductive traits for 112 flowering plants spanning a large elevational gradient(990-4260 m a.s.l.)in the Qinghai-Tibet *** found that flowering plants in the Qinghai-Tibet Plateau region are highly dependent on pollinators for seed production(76.2%of seed production was contributed by animal pollinators and 44.6%of plants would produce no seed without pollinator visitation).Contrary to our expectation,there was no significant elevational gradient in pollinator dependence *** the pollinator dependence index was not significantly correlated with pollen limitation,flower size,floral longevity,or reward type,it was correlated with compatibility status and flowering *** findings indicate that pollinator dependence does not decrease along an elevational gradient in the Qinghai-Tibet *** study also highlights the severe vulnerability of flowering plant seed production to pollinator declines under global change in the Qinghai-Tibet Plateau region,particularly for early-flowering or self-incompatible plants growing at higher elevations(e.g.,subnival belt).

关键词： Global change Pollen limitation Pollinator decline Qinghai-Tibet plateau Seed production

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Dysfunction of autophagy as the pathological mechanism of motor neuron disease based on a patient-specific disease model

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Neuroscience Bulletin 2015年第4期31卷 445-451页

作者： Dan-Jing Yang Liang Zhu Jie Ren rong-Jie ma Hongwen Zhu Jun Xu Advanced Institute of Translational Medicine Tongji University East Hospital Tongji University School of Medicine Tianjin Hospital Tianjin Academy of Integrative Medicine

Autophagy is the main catabolic pathway in cells for the degradation of impaired proteins and organelles. Accumulating evidence supports the hypothesis that dysfunction of autophagy, leading to an imbalance of proteostasis and the accumulation of toxic proteins in neurons, is a central player in the pathogenesis of neurodegenerative diseases such as Alzheimer＇s disease, Parkinson＇s disease, and amyotrophic lateral sclerosis （ALS）. The clinical pathology of ALS is complex and many genes associated with autophagy and RNA processing are mutated in patients with the familial form. But a causal relationship between autophagic dysfunction and ALS has not been fully established. More importantly, studies on the pathological mechanism of ALS are mainly based on animal models that may not precisely recapitulate the disease itself in human beings. The development of human iPSC techniques allows us to address these issues directly in human cell models that may profoundly influence drug discovery for ALS.

关键词： motor neuron disease iPSC autophagy amyotrophic lateral sclerosis spinal muscular atrophy

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Asian Journal of Andrology is advancing towards a bright future

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Asian Journal of Andrology 2010年第1期12卷 5-6页

作者： Yi-Fei Wang Qin-Zhu Zheng Dan-Qing Ren Hui Zhang Ling-Yan Ji rong-rong ma Asian Journal of Andrology Room 302 Building 16 294 Tai-Yuan Road Shanghai 200031 China

As time quickly passes, we once again have the opportunity to wave goodbye to last year and welcome the New Year. This is also an ideal point at which to reflect on the past and envision a brighter future for Asian Jo... 详细信息

关键词： no english key word

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