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16篇 您的检索式:作者名="Haimeng Li"
    题名 作者 年代 出处 被引量
1交互联合上的国际进步和评估在都市化和 eco 环境之间完成显示文摘全球都市化正在施加严重应力并且在 eco 环境上有影响深远的影响,并且还在那里存在在二之间的一种复杂非线性的联合关系。关于在都市化和 eco 环境之间的交互联合效果的研究将在下一 10 年里在国际地球系统科学和可持续性科学是学习和边疆的一个流行区域,当也是到国际组织的特别兴趣的一个高优先级的研究话题时。这篇论文系统地对照并且总结在关于交互联合理论的研究取得的国际进步,联合机制,联合法律,联合阀值,联合模型并且联合优化决定支持系统,联合关系。研究显示出交互联合理论包括的那都市化和 eco 环境 Kuznets 曲线理论, telecoupling 理论,行星的边界理论,脚印家庭理论和城市的新陈代谢理论;关于交互联合关系的大多数研究关心单身者 -- 元素联合关系,例如那些在都市化和水之间,土地,空气,气候变化,生态系统和生物多样性;关于交互联合机制和法律的研究的多数集中于五个研究范例,包括联合的人和自然开发和 eco 环境限制包围的系统,复杂聚会生态的系统,城市的生态系统, social-economic-natural 建筑群生态系统,和都市化;交互联合模拟使用 STIRPAT 的多数当模特儿,联合城市的计算机建模的度模型,多代理人系统模型和大数据;并且研究在联合阀值,强制风险和最佳的决定支持的都市化和 eco 环境上被执行了系统。在关于在都市化和 eco 环境之间的交互联合的国际研究的进步的客观评估建议有缺乏的焦点的点和六个区域研究的六主要研究:很多研究在宏观的联合效果上存在,与关于联合效果的城市的凝块和规模的很少研究;可观的研究在单个尺寸的联合效果上存在,与多重尺寸的联合效果上的很少;很多存在在上一对一双 -- 元素联合效果,与 many-to-many 上的很少,多重元素的联合完成;很多在在联合效果的否定反馈上联合效果,和很少的积极反馈上存在;很多在实验联合效果上存在,并且理论联合上的很少完成;很多在使用综合模拟方法上在简单量的方法,和很少的使用上存在。未来研究应该集中于在城市的凝块和 eco 环境联合在都市化之间的效果,空间规模联合效果,多维的联合效果, telecoupling 效果,一对多并且 many-to-many 元素联合效果,和积极、否定的反馈联合效果。也有需要为多元素, -scale,-scenario, 模块和代理人加强动态模型的开发和应用程序综合空间与时间的联合系统并且进一步在联合效果研究改进理论革新并且集成并且形成完全、多样的联合理论系统。FANG Chuanglin LIU Haimeng LI Guangdong 2016Journal of Geographical Sciences2016,26,8:28
2New-type urbanization in China: Predicted trends and investment demand for 2015-2030显示文摘The future development of new-type urbanization has drawn great attention from both the government and public alike. In this context, the present study had three related research aims. Firstly, it sought to predict the urbanization and population dynamics in China at both national and provincial levels for the period of 2015 to 2030. Secondly, on this basis, it sought to examine the spatial variation of urbanization given the predicted national urbanization rate of 70.12%. Thirdly, it sought to estimate and evaluate the national and provincial demands of investment in the development of new-type urbanization. The main conclusions from this study were as follows:(1) The population size and urbanization rate will reach 1.445 billion and 70.12%, respectively, from 2015 to 2030.(2) The demographic dividend will vanish when the population pressure reaches its maximum. During this period, there will be 70.16 million urban population born. The suburban population that becomes urbanized will be 316.7 million, and thus the net increase in urban population will reach 386 million.(3) Although the urbanization rate of every Chinese province will increase during 2015–2030, it will do so unequally, while differences in urbanization quality among provinces will also be substantial. In some provinces, moreover, the urbanization quality is not compatible with their eco-social development.(4) A total of 4,105,380 billion yuan is required to fund new-type urbanization and the investment demand for each province varies greatly; for example, Guangdong province requires the most funding, amounting to approximately 148 times that required by Tibet, the province in least need of funding. In the final part of this study, policy suggestions concerning the investment of the new-type urbanization are put forward and discussed.SUN Dongqi ZHOU Liang LI Yu LIU Haimeng SHEN Xiaoyan WANG Zedong WANG Xixi 2017Journal of Geographical Sciences2017,27,8:9
3A method to model the effect of pre-existing cracks on P-wave velocity in rocks显示文摘Crack closure is one of the reasons inducing changes of P-wave velocity of rocks under compression.In this context,a method is proposed to investigate the relationships among P-wave velocity,pre-existing cracks,and confining pressure based on the discrete element method(DEM).Pre-existing open cracks inside the rocks are generated by the initial gap of the flat-joint model.The validity of the method is evaluated by comparing the P-wave velocity tested on a sandstone specimen with numerical result.As the crack size is determined by the diameter of particles,the effects of three factors,i.e.number,aspect ratio,and orientation of cracks on the P-wave velocity are discussed.The results show that P-wave velocity is controlled by the(i.e.number) of open micro-cracks,while the closure pressure is determined by the aspect ratio of crack.The reason accounting for the anisotropy of P-wave velocity is the difference in crack number in measurement paths.Both of the number and aspect ratio of cracks can affect the responses of P-wave velocity to the applied confining pressure.Under confining pressure,the number of open cracks inside rocks will dominate the lowest P-wave velocity,and the P-wave velocity of the rock containing narrower cracks is more sensitive to the confining pressure.In this sense,crack density is difficult to be back-calculated merely by P-wave velocity.The proposed method offers a means to analyze the effect of pre-existing cracks on P-wave velocity.Haimeng Shen Xiaying Li Qi Li Haibin Wang 2020Journal of Rock Mechanics and Geotechnical Engineering2020,12,3:5
4Normobaric oxygen for cerebral ischemic injury显示文摘Oxygen inhalation has been shown to increase oxygen supply to tissues after cerebral ischemia/reperfusion injury,protecting injured neural cells.However,hyperbaric oxygen may aggravate oxidative stress.By contrast,normobaric oxygen has the rapid and non-invasive characteristics and may have therapeutic effects on ischemic/hypoxic disease.Rats inhaled normobaric oxygen(95%O2)for 6 consecutive days,and then a rat model of focal cerebral ischemia was established.Nissl and 2,3,5-triphenyltetrazolium chloride(TTC)staining revealed that normobaric oxygen pretreatment improved neurological deficits and reduced infarct volume.Immunohistochemical staining and western blot assay revealed that the expression of hypoxia-inducible factor-1α,Notch-1,vascular endothelial growth factor and erythropoietin were increased.Behavioral studies also verified that neurological deficit scores increased.The hypoxia-inducible factor inhibitor 2-methoxyestradiol treatment at 1 hour before administration of normobaric oxygen could suppress the protective effect of normobaric oxygen.Given these observations,normobaric oxygen pretreatment may alleviate cerebral ischemic injury via the hypoxia-inducible factor signal pathway.Chunhua Chen Haimeng Cui Zihe Li Ruifeng Wang Changman Zhou 2013Neural Regeneration Research2013,8,31:3
5Genomic and transcriptomic analysis unveils population evolution and development of pesticide resistance in fall armyworm Spodoptera frugiperda显示文摘The fall armyworm(FAW),Spodoptera frugiperda,is a destructive pest native to America and has recently become an invasive insect pest in China.Because of its rapid spread and great risks in China,understanding of FAW genetic background and pesticide resistance is urgent and essential to develop effective management strategies.Here,we assembled a chromosome-level genome of a male FAW(SFynMstLFR)and compared re-sequencing results of the populations from America,Africa,and China.Strain identification of 163 individuals collected from America,Africa and China showed that both C and R strains were found in the American pop-ulations,while only C strain was found in the Chinese and African populations.Moreover,population geno-mics analysis showed that populations from Africa and China have close relationship with significantly genetic differentiation from American populations.Taken toge-ther,FAWs invaded into China were most likely origi-nated from Africa.Comparative genomics analysis displayed that the cytochrome p450 gene family is extremely expanded to 425 members in FAW,of which 283 genes are specific to FAW.Treatments of Chinese populations with twenty-three pesticides showed the variant patterns of transcriptome profiles,and several detoxification genes such as AOX,UGT and GST spe-cially responded to the pesticides.These findings will be useful in developing effective strategies for manage-ment of FAW in China and other invaded areas.Furong Gui Tianming Lan Yue Zhao Wei Guo Yang Dong Dongming Fang Huan Liu Haimeng Li Hongli Wang Ruoshi Hao Xiaofang Cheng Yahong Li Pengcheng Yang Sunil Kumar Sahu Yaping Chen Le Cheng Shuqi He Ping Liu Guangyi Fan Haorong Lu Guohai Hu Wei Dong Bin Chen Yuan Jiang Yongwei Zhang Hanhong Xu Fei Lin Bernard Slippers Alisa Postma Matthew Jackson Birhan Addisie Abate Kassahun Tesfaye Aschalew Lemma Demie Meseret Destaw Bayeleygne Dawit Tesfaye Degefu Feng Chen Paul K.Kuria Zachary M.Kinyua Tong-Xian Liu Huanming Yang Fangneng Huang Xin Liu Jun Sheng Le Kang 2022Protein & Cell2022,13,7:2
6Effect of Zn^2+ during reactivation and refolding of urea-denatured ereatine kinase 显示文摘Li Sen Xu Zhen Zhou Haimeng 2002Biochemistry2002,67,7:1
7Isolated winding-coupled bidirectional ZVS converter with PWM plus phase-shift(PPS) control strategy显示文摘Li Wuhua Wu Haimeng Yu Hongbing 2011IEEE Transactions on Power Electronics2011,26,12:1
8Observation of directional change of core field inside flux ropes within one reconnection diffusion region in the Earth's magnetotail显示文摘Two consecutive magnetic flux ropes, separated by less than 30 s(Dt \ 30 s), are observed within one magnetic reconnection diffusion region without strong guide field in the Earth's magnetotail by Cluster multispacecraft. The flux ropes are characterized by bipolar signatures of the south–north magnetic field component Bz accompanied with strong core magnetic field By, intense current J and density depletions inside of them. In spite of the small but non-trivial global scale negative guide field(–By), there exists a directional change of the core fields of two flux ropes, i.e.,-Byfor the first one, and Byfor the second one. The directions of the core fields are the same as the ambient cross-tail magnetic field component(By) just outside of flux ropes. Therefore, we suggest that the core field of flux ropes is formed by compression of the local preexisting Byand that the directional change of core field is due to the change of local preexisting By. Such a change in ambient Bymight be caused by some microscale physics.Shiyong Huang Ye Pang Zhigang Yuan Xiaohua Deng Jiansen He Meng Zhou Huishan Fu Song Fu Huimin Li Dedong Wang Haimeng Li 2014Chinese Science Bulletin2014,59,34:1
9Assessment and Application of Beach Quality Based on Analytic Hierarchy Process in Yangkou Beach, Qingdao显示文摘The whole-beach quality assessment is the basis of building and preserving beautiful beaches.The beach quality assessment index system and assessment standard have been established based on the attributes of beaches(including the width,slope,landform,and types),sorting coefficient,and softness degree of surface sediment.The assessment weight of each index for quality evaluation was analyzed using the analytic hierarchy process,and comprehensive scores of selected beach profiles were calculated in accordance with the light assessment standard.A beach quality evaluation model based on index weight and scores was established in this paper.The factors of 12 profiles of Yangkou Beach in Qingdao City were surveyed to carry out a quality assessment,and the comprehensive scores of each profile were calculated in accordance with the evaluation model.The results showed that the quality of Yangkou Beach can be divided into four ratings:excellent,good,medium,and poor.The excellent-quality area includes a wide and flat dry beach zone and soft,flat,and clean intertidal and subtidal zones covered with well-sorted fine sand,and leisure sports,such as volleyball,running,and swimming,are suitable for tourists.The good-quality area features a slightly narrow and dry beach zone,moderately soft and uneven intertidal and subtidal zones covered with fine sand and a small tidal gully,and a small amount of foreign matter;leisure sports,such as walking and running,are suitable for tourists.This study recommends the building of fixed drainage ditches or underground culverts to reduce the tidal gully.The medium-quality area consisted of a narrow and dry beach zone,moderately soft and uneven intertidal and subtidal zones covered by poorly sorted medium sand,a tide ditch,and a small amount of foreign matter.In this area,walking is suitable for tourists.Sand should be supplemented in the intertidal zone.The poor-quality area contained a very narrow and dry beach zone covered with poor-sorted gravel,a very chaotic intertidal zone with a considerable amount of foreign matters,such as bricks and rocks,wide tidal ditches,and an uneven subtidal zone with some reefs;leisure sports are unsuitable here.Thus,foreign matter and reefs should be removed,and the dry beach zone should be supplemented with sand.Therefore,the beach quality assessment is a very useful tool for building beautiful beaches.LI Haimeng WANG Jingyi ZHU Chaoyue 2023Journal of Ocean University of China2023,22,1:1
10Oxygen cyclotron harmonic waves observed using Van Allen Probes显示文摘Fine structured multiple-harmonic electromagnetic emissions at frequencies around the equatorial oxygen cyclotron harmonics are observed by Van Allen Probe A outside the core plasmasphere(L^5) off the magnetic equator(MLAT~.7.5°)during a geomagnetic storm. We find that the multiple-harmonic emissions have power spectrum density(PSD) peaks during 2–8equatorial oxygen gyroharmonics( f ~ n fO+, n=2–8), while the fundamental mode(n=1) is absent, implying that the harmonic waves are generated near the equator and propagate into the observation region. Additionally, these electromagnetic emissions are linearly polarized. Different from the equatorial noise emission that propagates considerably obliquely, these emissions have moderate wave normal angles(approximately 40°–60°), which predominately increase as the harmonic number increases.Considering their frequency and wave normal angle characteristics, it is suggested that these multiple-harmonic emissions play an important role in the dynamic variation of radiation belt electrons.YU XiongDong YUAN ZhiGang WANG DeDong HUANG ShiYong LI HaiMeng YU Tao QIAO Zheng 2017Science China Earth Sciences2017,60,7:1
11An isolated PWM plus phase-shift controlled ZVS bidirectional converter with coupled inductors显示文摘WU Haimeng LI Wuhua ZHAO Yi 2011IEEE Transactions on Power Electronics2011,26,12:1
12Viral receptor profiles of masked palm civet revealed by single-cell transcriptomics显示文摘Civets are small mammals belonging to the family Viverridae.The masked palm civets(Paguma larvata)served as an intermediate host in the bat-to-human transmission of severe acute respiratory syndrome coronavirus(SARS-Co V)in 2003(Guan et al.,2003).Because of their unique role in the SARS outbreak,civets were suspected as a potential intermediate host of SARS-Co V-2.Peiwen Ding Haoyu Wang Jiacheng Zhu Fuyu An Jinqian Xu Xiangning Ding Lihua Luo Weiying Wu Qiuyu Qin Yanan Wei Wandong Zhao Zhiyuan Lv Haimeng Li Yixin Zhu Meiling Li Wensheng Zhang Yanan Zhang Zhihua Ou Huan Liu Yan Hua 2022Journal of Genetics and Genomics2022,49,11:0
13Bimetallic ZIFs-derived electrospun carbon nanofiber membrane as bifunctional oxygen electrocatalyst for rechargeable zinc-air battery显示文摘The recharged zinc-air battery(ZAB) has drawn significant attention owing to increasing requirement for energy conversion and storage devices.Fabricating the efficient bifunctional oxygen catalyst using a convenient strategy is vitally important for the rechargeable ZAB.In this study,the bimetallic ZIFs-containing electrospun(ES) carbon nanofibers membrane with hierarchically porous structure was prepared by coaxial electrospinning and carbonization process,which was expected to be a bifunctional electrocatalyst for ZABs.Owing to the formed dual single-atomic sites of Co-N_(4) and Zn-N_(4),the obtained ES-Co/ZnCNZIFexhibited the preferable performance toward oxygen reduction reaction(ORR) with E1/2of 0.857 V and JLof 5.52 mA cm^(-2),which were more than Pt/C.Meanwhile,it exhibited a marked oxygen evolution reaction(OER) property with overpotential of 462 mV due to the agglomerated metallic Co nanoparticles.Furthermore,the ZAB based on the ES-Co/Zn-CNZIFcarbon nanofibers membranes delivered peak power density of 215 mW cm^(-2),specific capacity of 802.6 mA h g^(-1),and exceptional cycling stability,far larger than Pt/C+RuO_(2)-based ZABs.A solid-state ZAB based on ES-Co/Zn-CNZIFshowed better flexibility and stability with different bending angles.Yanan Ma Shaoru Tang Haimeng Wang Yuxuan Liang Dingyu Zhang Xiaoyang Xu Qian Wang Wei Li 2023Journal of Energy Chemistry2023,,8:0
14An improved SOI trench LDMOST with double vertical high-k insulator pillars显示文摘An SOI trench LDMOST(TLDMOST)with ultra-low specific on-resistanceis proposed.It features double vertical high-k insulator pillars(Hk_1 and Hk_2)in the oxide trench,which are connected to the source electrode and drain electrode,respectively.Firstly,under reverse bias voltage,most electric displacement lines produced by the charges of the depleted drift region in the source side go through the Hk_1,and thus the average electric field strength under the source can be enhanced.Secondly,two additional electric field peaks are induced by the Hk_1,which further modulate the electric field in the drift region under the source.Thirdly,most electric displacement lines produced by the charges of the depleted drift region in the drain side enter into the Hk_2.This not only introduces one more electric field peak at the corner of the oxide trench around the Hk_2,but also forms the enhanced vertical reduced surface field effect,which modulates the electric field in the drift region under the drain.With the effects of the two Hk insulator pillars,the breakdown voltage(BV)and the drift region doping concentration are significantly improved.The simulation results indicate that compared with the oxide trench LDMOST(previous TLDMOST)with the same geometry,the proposed double Hk TLDMOST enhances the BV by 86%and reduces theby 88%.Huan Li Haimeng Huang Xingbi Chen 2018Journal of Semiconductors2018,39,9:0
15Advances in spatiotemporal graph neural network prediction research显示文摘Being a kind of non-Euclidean data,spatiotemporal graph data exists everywhere from trafficflow,air quality index to crime case,etc.Unlike the raster data,the irregular and disordered characteristics of spatiotemporal graph data have attracted the research interest of scholars,with the prediction of spatiotemporal graph data being one of the research hot spots.The emergence of spatiotemporal graph neural networks(ST-GNNs)provides a new insight for solving the problem of obtaining spatial correlation for spatiotemporal graph data prediction while achieving state-of-the-art performance.In this paper,comprehensive survey of research on ST-GNNs prediction domain isa presented,where the background of ST-GNNs is introduced before the computational paradigm of ST-GNN is thoroughly reviewed.From the perspective of model construction,59 well-known models in recent years are classified and discussed.Some of these models are further analyzed in terms of performance and efficiency.Subsequently,the categories and applicationfields of spatiotemporal graph data are summarized,providing a clear idea of technology selection for different applications.Finally,the evolution history and future direction of ST-GNNs are also summarized,to facilitate future researchers to timely understand the current state of prediction research by ST-GNNs.Jianghong Zhao Yi Wang Xintong Dou Xin Wang Ming Guo Ruiju Zhang Haimeng Li 2023International Journal of Digital Earth2023,16,1:0
16Distinct and shared endothermic strategies in the heat producing tissues of tuna and other teleosts显示文摘Although most fishes are ectothermic,some,including tuna and billfish,achieve endothermy through specialized heat producing tissues that are modified muscles.How these heat producing tissues evolved,and whether they share convergent molecular mechanisms,remain unresolved.Here,we generated a high-quality genome from the mackerel tuna(Euthynnus affinis)and investigated the heat producing tissues of this fish by single-nucleus and bulk RNA sequencing.Compared with other teleosts,tuna-specific genetic variation is strongly associated with muscle differentiation.Single-nucleus RNA-seq revealed a high proportion of specific slow skeletal muscle cell subtypes in the heat producing tissues of tuna.Marker genes of this cell subtype are associated with the relative sliding of actin and myosin,suggesting that tuna endothermy is mainly based on shivering thermogenesis.In contrast,cross-species transcriptome analysis indicated that endothermy in billfish relies mainly on nonshivering thermogenesis.Nevertheless,the heat producing tissues of the different species do share some tissue-specific genes,including vascular-related and mitochondrial genes.Overall,although tunas and billfishes differ in their thermogenic strategies,they share similar expression patterns in some respects,highlighting the complexity of convergent evolution.Baosheng Wu Xueli Gao Mingling Hu Jing Hu Tianming Lan Tingfeng Xue Wenjie Xu Chenglong Zhu Yuan Yuan Jiangmin Zheng Tao Qin Peidong Xin Ye Li Li Gong Chenguang Feng Shunping He Huan Liu Haimeng Li Qing Wang Zhenhua Ma Qiang Qiu Kun Wang 2023Science China(Life Sciences)2023,66,11:0
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