维普中文期刊产品整合服务
85篇 您的检索式:作者名="Donghai LIU"
    题名 作者 年代 出处 被引量
1Exogenous plant MIR168a specifically targets mammalian LDLRAPI: evidence of cross-kingdom regulation by microRNA显示文摘Lin Zhang Dongxia Hou Xi Chen Donghai Li Lingyun Zhu Yuj ing Zhang Jing Li Zhen Bian Xiangying Liang Xing Cai Yuan Yin Cheng Wang Tianfu Zhang Dihan Zhu Dianmu Zhang Jie Xu Qun Chen Yi Ba Jing Liu Qiang Wang Jianqun Chen Jin Wang Meng Wang Qipeng Zhang Junfeng Zhang Ke Zen Chen-Yu Zhang 2012Cell Research2012,22,1:155
2Theoretical research on construction quality real-time monitoring and system integration of core rockfill dam显示文摘With the enlargement of core rockfill dam construction scale and the improvement of construction mechanization level, the traditional manual construction quality control method is now difficult to meet the quality and safety demands of modern dam construction, so automatic and real-time dam construction quality monitoring with high-techs is urgently needed. The paper makes theoretical research on construction quality real-time monitoring and system integration of core rockfill dam, proposes implementation method and integrated solution of construction quality real-time monitoring of core rockfill dam construction process, realizes refining, all-whether, entire-process and real-time control and analysis on key links of dam construction, and introduces the application of the construction quality real-time monitoring and system integration technology to a practical core rockfill dam project.ZHONG DengHua CUI Bo LIU DongHai TONG DaWei 2009Science China(Technological Sciences)2009,52,11:59
3Real-time compaction quality monitoring of high core rockfill dam显示文摘The conventional quality control method of core rockfill dam construction exhibit difficulty controlling compaction parameters accurately or ensuring construction quality. This is because it is easily influenced by human behavior or lack of adequate management. We therefore establish the timely monitoring indexes and control criteria of compaction processes by considering the characteristics and quality requirements of high core rockfill dam construction. Based on the established indexes and criteria, integrating GPS, GPRS and PDA technologies, a real-time compaction quality monitoring method is proposed. The relevant key techniques are proposed as well, including automatic collection of information and a graphic algorithm for rolling-process visualization. By the proposed method and techniques, a real-time monitoring system is provided to realize the precise automatic online entire-process monitoring of compaction parameters, including compaction pass, rolling trajectory, running speed of roller, vibration status and rolled pavement thickness. The application of the Nuozhadu project shows that the proposed system can control compaction parameters effectively and ensure better construction quality. Therefore, it might become a new way towards construction quality control of high core rockfill dam.ZHONG DengHua LIU DongHai CUI Bo 2011Science China(Technological Sciences)2011,54,7:45
4Spatiotemporal changes in vegetation coverage and its driving factors in the Three-River Headwaters Region during 2000-2011显示文摘The Three-River Headwaters Region(TRHR), which is the source area of the Yangtze River, Yellow River, and Lancang River, is of key importance to the ecological security of China. Because of climate changes and human activities, ecological degradation occurred in this region. Therefore, 'The nature reserve of Three-River Source Regions' was established, and 'The project of ecological protection and construction for the Three-River Headwaters Nature Reserve' was implemented by the Chinese government. This study, based on MODIS-NDVI and climate data, aims to analyze the spatiotemporal changes in vegetation coverage and its driving factors in the TRHR between 2000 and 2011, from three dimensions. Linear regression, Hurst index analysis, and partial correlation analysis were employed. The results showed the following:(1) In the past 12 years(2000–2011), the NDVI of the study area increased, with a linear tendency being 1.2%/10a, of which the Yangtze and Yellow River source regions presented an increasing trend, while the Lancang River source region showed a decreasing trend.(2) Vegetation coverage presented an obvious spatial difference in the TRHR, and the NDVI frequency was featured by a bimodal structure.(3) The area with improved vegetation coverage was larger than the degraded area, being 64.06% and 35.94%, respectively during the study period, and presented an increasing trend in the north and a decreasing trend in the south.(4) The reverse characteristics of vegetation coverage change are significant. In the future, degradation trends will be mainly found in the Yangtze River Basin and to the north of the Yellow River, while areas with improving trends are mainly distributed in the Lancang River Basin.(5) The response of vegetation coverage to precipitation and potential evapotranspiration has a time lag, while there is no such lag in the case of temperature.(6) The increased vegetation coverage is mainly attributed to the warm-wet climate change and the implementation of the ecological protection project.LIU Xianfeng ZHANG Jinshui ZHU Xiufang PAN Yaozhong LIU Yanxu ZHANG Donghai LIN Zhihui 2014Journal of Geographical Sciences2014,24,2:47
5Land-surface processes and summer-cloud-precipitation characteristics in the Tibetan Plateau and their effects on downstream weather:a review and perspective显示文摘Correct understanding of the land-surface processes and cloud-precipitation processes in the Tibetan Plateau(TP)is an important prerequisite for the study and forecast of the downstream activities of weather systems and one of the key points for understanding the global atmospheric movement.In order to show the achievements that have been made,this paper reviews the progress on the observations for the atmospheric boundary layer,land-surface heat fluxes,cloud-precipitation distributions and vertical structures by using ground-and space-based multiplatform,multisensor instruments and the effect of the cloud system in the TP on the downstream weather.The results show that the form drag related to the topography,land-atmosphere momentum and scalar fluxes is an important part of the parameterization process.The sensible heat flux decreased especially in the central and northern TP caused by the decrease in wind speeds and the differences in the ground-air temperatures.Observations show that the cloud and precipitation over the TP have a strong diurnal variation.Studies also show the compressed-air column in the troposphere by the higher-altitude terrain of the TP makes particles inside clouds vary at a shorter distance in the vertical direction than those in the non-plateau area so that precipitation intensity over the TP is usually small with short duration,and the vertical structure of the convective precipitation over the TP is obviously different from that in other regions.In addition,the influence of the TP on severe weather downstream is preliminarily understood from the mechanism.It is necessary to use model simulations and observation techniques to reveal the difference between cloud precipitation in the TP and non-plateau areas in order to understand the cloud microphysical parameters over the TP and the processes of the land boundary layer affecting cloud,precipitation and weather in the downstream regions.Yunfei Fu Yaoming Ma Lei Zhong Yuanjian Yang Xueliang Guo Chenghai Wang Xiaofeng Xu Kun Yang Xiangde Xu Liping Liu Guangzhou Fan Yueqing Li Donghai Wang 2020National Science Review2020,7,3:10
6Optimization of endwall contouring in axial compressor S-shaped ducts显示文摘This paper presents a numerical investigation of the potential aerodynamic benefits of using endwall contouring in a fairly aggressive duct with six struts based on the platform for endwall design optimization.The platform is constructed by integrating adaptive genetic algorithm(AGA), design of experiments(DOE), response surface methodology(RSM) based on the artificial neural network(ANN), and a 3D Navier–Stokes solver.The visual analysis method based on DOE is used to define the design space and analyze the impact of the design parameters on the target function(response).Optimization of the axisymmetric and the non-axisymmetric endwall contouring in an S-shaped duct is performed and evaluated to minimize the total pressure loss.The optimal ducts are found to reduce the hub corner separation and suppress the migration of the low momentum fluid.The non-axisymmetric endwall contouring is shown to remove the separation completely and reduce the net duct loss by 32.7%.Jin Donghai Liu Xiwu Zhao Weiguang Gui Xingmin 2015Chinese Journal of Aeronautics2015,28,4:7
7Large-area straight,regular periodic surface structures produced on fused silica by the interference of two femtosecond laser beams through cylindrical lens显示文摘Inhomogeneity and low efficiency are two important factors that limit the application of laser-induced periodic surface structures(LIPSSs),especially on glass surfaces.In this study,two-beam interference(TBI)of femtosecond lasers was used to produce large-area straight LIPSSs on fused silica using cylindrical lenses.Compared with those produced us-ing a single circular or cylindrical lens,the LIPSSs produced by TBI are much straighter and more regular.Depending on the laser fluence and scanning velocity,LIPSSs with grating-like or spaced LIPSSs are produced on the fused silica sur-face.Their structural colors are blue,green,and red,and only green and red,respectively.Grating-like LIPSS patterns oriented in different directions are obtained and exhibit bright and vivid colors,indicating potential applications in surface coloring and anti-counterfeiting logos.Long Chen Kaiqiang Cao Yanli Li Jukun Liu Shian Zhang Donghai Feng Zhenrong Sun Tianqing Jia 2021Opto-Electronic Advances2021,4,12:7
8An Analytical Method for Calculating the Shielding Effectiveness of an Enclosure with an Oblique Rectangular Aperture显示文摘An efficient analytical method is proposed to calculate the Shielding effectiveness(SE)of an enclosure with an oblique rectangular aperture.This enclosure was first decomposed into two ones with horizontal rectangular apertures through mirror image and Green function theories.The SE of each decomposed enclosure was calculated by the Robinson’s method.The relationship between the SE of the original cavity and those of the decomposed ones was also derived analytically.The SE of the original cavity could be directly obtained from this analytical relationship.The accuracy of the proposed method was validated with measurements and the Transmission line matrix(TLM)solver.The results show that the efficiency was largely improved compared with the TLM solver.SU Donglin LIU Hongyi YANG Shunchuan ZHAO Zihua SUI Donghai 2019Chinese Journal of Electronics2019,28,4:5
9Investigation of Non-Axisymmetric Endwall Contouring in a Compressor Cascade显示文摘The current paper presents experimental and computational results to assess the effectiveness of non-axisymmetric endwall contouring in a compressor linear cascade. The endwall was designed by an endwall design optimization platform at 0° incidence(design condition). The optimization method is based on a genetic algorithm. The design objective was to minimize the total pressure losses. The experiments were carried out in a compressor cascade at a low-speed test facility with a Mach number of 0.15. Four nominal inlet flow angles were chosen to test the performance of non-axisymmetric Contoured Endwall(CEW). A five-hole pressure probe with a head diameter of 2 mm was used to traverse the downstream flow fields of the flat-endwall(FEW) and CEW cascades.Both the measured and predicted results indicated that the implementation of CEW results in smaller corner stall,and reduction of total pressure losses. The CEW gets 15.6% total pressure loss coefficient reduction at design condition, and 22.6% at off-design condition(+7° incidence). And the mechanism of the improvement of CEW based on both measured and calculated results is that the adverse pressure gradient(APG) has been reduced through the groove configuration near the leading edge(LE) of the suction surface(SS).LIU Xiwu JIN Donghai GUI Xingmin 2017Journal of Thermal Science2017,26,6:5
10Geological Controls on the CBM Productivity of No.15 Coal Seam of Carboniferous–Permian Taiyuan Formation in Southern Qinshui Basin and Prediction for CBM High-yield Potential Regions显示文摘Coalbed methane(CBM) resources in No.15 coal seam of Taiyuan Formation account for 55% of the total CBM resources in southern Qinshui Basin(SQB), and have a great production potential. This study aims at investigating the CBM production in No.15 coal seam and its influence factors. Based on a series of laboratory experiments and latest exploration and development data from local coal mines and CBM companies, the spatial characteristics of gas production of No.15 coal seam were analyzed and then the influences of seven factors on the gas productivity of this coal seam were discussed, including coal thickness, burial depth, gas content, ratio of critical desorption pressure to original coal reservoir pressure(RCPOP), porosity, permeability, and hydrogeological condition. The influences of hydrological condition on CBM production were analyzed based on the discussions of four aspects: hydrogeochemistry, roof lithology and its distribution, hydrodynamic field of groundwater, and recharge rate of groundwater. Finally, a three-level analytic hierarchy process(AHP) evaluation model was proposed for predicting the CBM potentials of the No.15 coal seam in the SQB. The best prospective target area for CBM production of the No.15 coal seam is predicted to be in the districts of Panzhuang, Chengzhuang and south of Hudi.ZHANG Zheng QIN Yong ZHUANG Xinguo LI Guoqing LIU Donghai 2018Acta Geologica Sinica(English Edition)2018,92,6:5
11Resistivity response to the porosity and permeability of low rank coal显示文摘Laojunmiao coal samples from the eastern Junggar basin were studied to understand the relationship between coal resistivity and the physical parameters of coal reservoirs under high temperatures and pressures.Specifically,we analysed the relationship of coal resistivity to porosity and permeability via heating and pressurization experiments.The results indicated that coal resistivity decreases exponentially with increasing pressure.Increasing the temperature decreases the resistivity.The sensitivity of coal resistivity to the confining pressure is worse when the temperature is higher.The resistivity of dry coal samples was linearly related to φ~m.Increasing the temperature decreased the cementation exponent(m).Increasing the confining pressure exponentially decreases the porosity.Decreasing the pressure increases the resistivity and porosity for a constant temperature.Increasing the temperature yields a quadratic relationship between the resistivity and permeability for a constant confining pressure.Based on the Archie formula,we obtained the coupling relationship between coal resistivity and permeability for Laojunmiao coal samples at different temperatures and confining pressures.Wang Gang Qin Yong Shen Jian Hu Yuanyuan Liu Donghai Zhao Long 2016International Journal of Mining Science and Technology2016,26,2:4
12Catalyzing polysulfide conversion by g-C3N4 in a graphene network for long-life lithium-sulfur batteries显示文摘Meng Wang Qinghua Liang Junwei Han Ying Tao Donghai Liu Chen Zhang Wei Lv Quan-Hong Yang 2018Nano Research2018,11,6:4
13On transitioning from PID to ADRC in thermal power plants显示文摘This paper focuscs on the recent progress in the adoption of active disturbance rejection control(ADRC)in thermal pro-cesses as a viable alternative to proportional-_integral-derivative(PID),especially in coa-fired power plants.The profound interpretation of this paradigm shift,with backward compatibility,is discussed in detail.A few fundamental issues associated with ADRC's applications in thermal processes are discussed,such as implementation,tuning,and the structural changes.Examples and case studies are presented,encompassing coal-fired power plants,gas turbines and nuclear power plants,as well as highlighting results of field applications.Also discussed are future research opportunities brought by ADRC's entry as the baseline control technology in thermal processes.Zhenlong Wu Zhiqiang Gao Donghai Li YangQuan Chen Yanhong Liu 2021Control Theory and Technology2021,19,1:4
14A novel rat model of cardiopulmonary bypass for deep hypothermic circulatory arrest without blood priming显示文摘Zhang Weihua Zhang Yanbo Liu Donghai Zhu Yaobin Qiao Chenhui Wang Jiaxiang Xu Yulin Liu Yang Li Bin Yang Yao 2014Chinese Medical Journal2014,,7:3
15Self-Assembled Materials for Catalysis显示文摘The purpose of this review is to highlight developments in self-assembled nanostructured materials(i.e.,mesoporous and nanoparticle-based materials)and their catalytic applications.Since there are many available reviews of metal-based nanoparticles as catalysts,this review will mainly focus on self-assembled oxide-based catalytic materials.The content includes:(1)design and synthetic strategies for self-assembled mesoporous catalysts,(2)polyoxometalate(POM)-based nanocatalysts,(3)dendrimer-based nanocatalysts,and(4)shaped nanomaterials and catalytic applications.We show that controlled assembly of molecules,crystalline seeds,and nano building blocks into organized mesoscopic structures or controlled morphologies is an effective approach for tailoring porosities of heterogeneous catalysts and controlling their catalytic activities.Kake Zhu Donghai Wang Jun Liu 2009Nano Research2009,2,1:3
16Permian-Triassic magmatic evolution of granitoids from the southeastern Central Asian Orogenic Belt:Implications for accretion leading to collision显示文摘Many orogenic belts in the world exhibit accretionary and collisional orogenic phases to varying extents.How accretion evolves into collision of the Central Asian Orogenic Belt(CAOB),the largest Phanerozoic accretionary orogenic belt,is an intriguing question.In this paper,we present new U-Pb age,geochemical and isotopic data for Permian-Triassic granitoids from middle Inner Mongolia,Northern China in the southeastern CAOB,and delineate the magmatic transition from subduction to(soft)collision.The magmatic record of soft collision is identified and characterized by thickened lower crust-derived high Sr/Y granitoids with a sub-linear distribution along the Solonker suture zone.Granitoids from Early Permian to Late Permian became more enriched in whole-rock Nd and zircon Hf isotopic compositions(εNd(t)values from 2.4 to-19.5,εHf(t)values from 11.6 to-33.7),indicating increasing incorporation of old crust.The change in peak timing of magmatism from west(ca.264 Ma)to east(ca.251 Ma)along the Solonker suture zone implies'scissor-like'closure of the Paleo-Asian Ocean.Integrated with previous studies,a three-stage tectonic model from the Permian to Triassic by accretion leading to collision on the south-eastern margin of CAOB is proposed.(1)Early Permian(>ca.285 Ma):Juvenile magmatism on an active continental margin with double-sided subduction of the Paleo-Asian Ocean;(2)Middle Permian to Middle Triassic(ca.285–235 Ma):Magma source transition from juvenile to old crust induced by a tectonic switch from arc to'scissor-like'closure and subsequent intracontinental orogenic contraction;(3)Late Triassic(Didi WU Shan LI David CHEW Tieyi LIU Donghai GUO 2021Science China Earth Sciences2021,64,5:3
17Hemodynamic analysis of intracranial aneurysms using phase-contrast magnetic resonance imaging and computational fluid dynamics显示文摘Additional hemodynamic parameters are highly desirable in the clinical management of intracranial aneurysm rupture as static medical images cannot demonstrate the blood flow within aneurysms. There are two ways of obtaining the hemodynamic information—by phase-contrast magnetic resonance imaging(PCMRI) and computational fluid dynamics(CFD). In this paper, we compared PCMRI and CFD in the analysis of a stable patient's specific aneurysm.The results showed that PCMRI and CFD are in good agreement with each other. An additional CFD study of two stable and two ruptured aneurysms revealed that ruptured aneurysms have a higher statistical average blood velocity,wall shear stress, and oscillatory shear index(OSI) within the aneurysm sac compared to those of stable aneurysms.Furthermore, for ruptured aneurysms, the OSI divides the positive and negative wall shear stress divergence at the aneurysm sac.Xuemei Zhao Rui Li Yu Chen Sheau Fung Sia Donghai Li Yu Zhang Aihua Liu 2017Acta Mechanica Sinica2017,33,2:3
18Spatially Interlinked Graphene with Uniformly Loaded Sulfur for High Performance Li-S Batteries显示文摘锂硫(Li-S ) 电池由于他们的高精力密度,环境友好和低费用引起了广泛的注意。在这研究,三维(3D ) graphene/S 混血儿(G/S ) 被一个一个壶准备和在基于 S 的化合物和 graphene 氧化物之间的氧化还原作用反应的热水的方法(去) 。G/S 有三维的多孔的结构,在 graphene 与形成 3D 的对方一起被互连的地方传导性的网络。它证明 G/S 的毛孔结构能被优化 3D 的弄干的方法很好控制基于 graphene 的材料。结冰弄干,导致蒸发的弄干能导致 G/S 的不同密度和毛孔结构。电气化学的测试说明产生混血儿能为 1 −1 和 575 mAh·g −1 的一个特定的能力 > st 和 100 在 500 mAh·g −1 的当前的密度的 th 周期。Donghai Liu Chen Zhang Xiaohui Lv Xiaoyu Zheng Lei Zhang Linjie Zhi Quan-Hong Yang 2016Chinese Journal of Chemistry2016,34,1:3
19Effects of greenness on preterm birth: A national longitudinal study of 3.7 million singleton births显示文摘Exposure to greenness may lead to a wide range of beneficial health outcomes.However,the effects of greenness on preterm birth(PTB)are inconsistent,and limited studies have focused on the subcategories of PTB.A total of 3,751,672 singleton births from a national birth cohort in China's Mainland were included in this study.Greenness was estimated using the satellitebased Normalized Difference Vegetation Index(NDVI)and Enhanced Vegetation Index with 500-m and 1,000-m buffers around participants’addresses.The subcategories of PTB(20-36 weeks)included extremely PTB(EPTB,20-27 weeks).Lina Zhang Shuyan Shi Shenpeng Wu Ying Yang Jihong Xu Ya Zhang Qiaomei Wang Haiping Shen Yiping Zhang Donghai Yan Zuoqi Peng Cong Liu Weidong Wang Yixuan Jiang Su Shi Renjie Chen Haidong Kan Yuan He Xia Meng Xu Ma 2022The Innovation2022,3,3:2
20Synergistic effect of the metal-support interaction and interfacial oxygen vacancy for CO_(2) hydrogenation to methanol over Ni/In_(2)O_(3) catalyst:A theoretical study显示文摘Indium oxide supported nickel catalyst has been experimentally confirmed to be highly active for CO_(2) hydrogenation towards methanol.In this work,the reaction mechanism for CO_(2) hydrogenation to methanol has been investigated on a model Ni/In_(2)O_(3) catalyst,i.e.,Ni_(4)/In_(2)O_(3),via the density functional theory(DFT)study.Three possible reaction pathways,i.e.,the formate pathway,CO hydrogenation and the reverse water-gas-shift(RWGS)pathways,have been examined on this model catalyst.It has been demonstrated that the RWGS pathway is the most theoretically-favored for CO_(2) hydrogenation to methanol.The complete RWGS pathway follows CO_(2)+6 H→COOH+5 H→CO+H_(2)O+4 H→HCO+H_(2)O+3 H→H_(2)CO+H_(2)O+2 H→H_(3)CO+H_(2)O+H→H_(3)COH+H_(2) O.Furthermore,it has been also proved that the interfacial oxygen vacancy can serve as the active site for boosting the CO_(2) adsorption and charge transfer between the nickel species and indium oxide,which synergistically promotes the consecutive CO_(2) hydrogenation towards methanol.Chenyang Shen Qianqian Bao Wenjuan Xue Kaihang Sun Zhitao Zhang Xinyu Jia Donghai Mei Chang-jun Liu 2022Journal of Energy Chemistry2022,31,2:2
返回顶部 每页显示:
共5页 首页 上一页 第1页 下一页 末页 /5 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费