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    题名 作者 年代 出处 被引量
1坚持合作共赢 携手打造亚洲命运共同体(英文)显示文摘China has never been so close to the center of the world stage like today, neither has it been so closely connected with the destiny of the outside neither outside world. The concept of 'community of common destiny' is the proposal China raises for the future welfare of Asia and even the world on the basis of China's long-term development and the prosperity and stability of its neighboring countries.Liu Zhenmin 2014国际问题研究2014,,2:44
2Experimental study on dehydration melting of natural biotite-plagioclase gneiss from High Himalayas and implications for Himalayan crust anatexis显示文摘Here we present the results of dehydration melting, melt morphology and fluid migration based on the dehydration melting experiments on natural bio-tite-plagioclase gneiss performed at the pressure of 1.0-1.4 GPa, and at the temperature of 770-1028℃. Experimental results demonstrate that: (i) most of melt tends to be distributed along mineral boundaries forming 'melt film' even the amount of melt is less than 5 vol%; melt connectivity is controlled not only by melt topology but also by melt fraction; (ii) dehydration melting involves a series of subprocesses including subsoiidus dehydration reaction, fluid migration, vapor-present melting and vapor-absent melting; (iii) experiments produce peraluminous granitic melt whose composition is similar to that of High Himalayan leucogranites (HHLG) and the residual phase assemblage is Pl+Qz+ Gat+Bio+Opx±Cpx+IIm/Rut±Kfs and can be comparable with granulites observed in Himalayas. The experiments provide the evidence that biotite-plagioclase gneiss is one ofYANG Xiaosong JIN Zhenmin Ernst Huenges Frank R.Schilling Bernd Wunder 2001Chinese Science Bulletin2001,46,10:27
3AFLP analysis revealed differences in genetic diversity of four natural populations of Manila clam (Ruditapes philippinarum) in China显示文摘The amplified fragment length polymorphism (AFLP) technology was used to analyze the genetic diversities in four natural populations of Manila clam (Ruditapes philippinarum), distributed in four sea areas of China, i.e., the Bohai Sea, the Huanghai Sea, the East China Sea and the South China Sea. Two hundred and sixty-four AFLP loci were analysed in 195 individuals and revealed high levels of genetic diversity. The percentage of polymorphic loci ranged from 92.13% to 96.06% and the Shannon’s information index was from 0.256 8 to 0.275 6. By analyzing molecular variance (AMOVA), it was found that there were high levels of genetic differentiation between populations of Qingdao and the other three sea areas. Cluster analysis by Nei’s pairwise distances grouped specimens by geographical origin, except the population of Qingdao. A conclusion can be drawn that there are high genetic diversities in the four natural populations of Manila clam in China and some distinct differences existed among and between the four populations. The results also indicated that human cultivation activities will have great influence on the genetic structure of the population of Qingdao.LIU Xiangquan BAO Zhenmin HU Jingjie WANG Shi ZHAN Aibin LIU Hui FANG Jianguang WANG Rucai 2007Acta Oceanologica Sinica2007,26,1:18
4Eclogite-melt/peridotite reaction: Experimental constrains on the destruction mechanism of the North China Craton显示文摘To study the mechanism of melt-peridotite reaction pertinent to the destruction of the North China Craton (NCC) lithosphere, a series of experiments were performed at a pressure of 2.0 GPa and temperatures from 1250 to 1400°C using Bixiling eclogite and Damaping peridotite as starting materials. The experimental results show that the reaction between eclogite melt and peridotite causes dissolution of olivine and orthopyroxene and precipitation of clinopyroxene in the melt. The experimental run products, characterized by a lherzolite/pyroxenite/garnet-pyroxenite sequence, are consistent with the mantle xenoliths in the Neogene Hannuoba basalt of the NCC found by Liu et al. (2005). It suggests that the mafic lower continental crust was probably recycled into the mantle during the Mesozoic Era. In the experiments conducted at 1300 and 1350°C, the resulting melts have a high Mg# andesite signature, indicating that the melt-peridotite reaction may have played a major role in the generation of high Mg# andesite. Our experimental results support the hypothesis that melts derived from foundered eclogite in the asthenosphere will consume the lithospheric peridotites. Therefore, melt-peridotite reaction is an important mechanism for the destruction/thinning of the lithosphere.WANG Chao JIN ZhenMin GAO Shan ZHANG JunFeng ZHENG Shu 2010Science China Earth Sciences2010,53,6:17
5Genesis of granulite in Himalayan lower crust:Evidence from experimental study at high temperature and high pressure显示文摘Here we present an insight into the genesis of Himalayan granulitic lower crust based on the experimental studies on the dehydration melting of natural biotite-plagioclase gneiss performed at the temperatures of 770-980°C and the pressures of 1.0-1.4 GPa. The experiments produce peraluminous granitic melt and residual phase assemblage (Pl+Qz+Gat+Bio+Opx±Cpx+Ilm/Rut±Kfs). The residual mineral assemblage is similar to those of granu-lites observed at the eastern and western Himalayan syntax-ises, and the chemical compositions of characteristic minerals-garnet and pyroxene in the residual phase and the granu-lite are identical. Additionally, the modeled wave velocities of the residual phase assemblage are comparable well with those of the top part of lower crust beneath Himalayas. Hence, we suggest that (1) the top part of lower crust beneath Himalayas is probably made up of garnet-bearing intermediate granulite; (2) the formations of granulite and leucogranites in Himalayas are interrelated as theYANG Xiaosong JIN Zhenmin E.Huenges GAO Shan B.Wunder F.R.Schilling 2002Chinese Science Bulletin2002,47,6:16
6Lithospheric seismic fabrics of Sulu ultrahigh-pressure metamorphic belt显示文摘Calibration of seismic reflectors appearing in the crust of the Chinese continent sci- entific drilling site can be completed through the correlation studies between direct evidences, such as the drill cores, and geophysical signatures; therefore the interpretation of geophysical data could produce reliable results of crustal structure and composition. On the other hand, there are two Cenozoic volcanoes close to the scientific drilling site; analyzing composition of xenoliths existent in the volcanoes and evaluating their seismic velocities can also offer information about the mantle and lower crust. After the calibration via cores and well-logging data, the seismic re- flectors appearing in the UHP belt can be caused by lithological changes within the UHP rock slice, ductile shearing rock-suites, and later fracture zones. Among these sources, ductile shearing resulted in displacement and detachment of original rock-sheets, producing some rock-interbeds of several hundred meters thick that are named the ductile shearing rock-suites. A suite consists of mylonized gneiss and eclogite slices that underwent shearing, becoming the major mechanism responsible to generate regional strong reflections. The UHP rock-slice is characterized by complicated structures and high density, high seismic velocity and high electri- cal resistivity, its thickness is usually less than 11 km. Velocity and density of the gneiss-layer beneath gradually tend to normal with increasing depth. Based on the xenoliths we can infer that the middle crust contains a lot of gneisses, and the lower crust consists of different granulites. The lithospheric mantle has multi-layer structures and consists mainly of spinal lherzolite and harzburgite, implying late Mesozoic lithospheric thinning. The seismic fabrics with different ori- gins were possible products of different geodynamic processes. For instance, the UHP rock-slice was produced by the UHP metamorphic process and the exhumation of subducted supercrustal rocks after the Triassic collision between the Yangtze and Sino-Korean cratons; whilst the ductile shearing rock-suites resulted from shearing deformation processes during the subduction and exhumation. The normal velocity below the UHP rock-slice was correlated with Mesozoic exten- sion processes in the area. Through careful calibration of seismic reflectors and analyzing xeno- liths, one can find the relationship between the causes of seismic reflectors and corresponding geodynamic processes, offering a new basis for reconstruction of regional dynamic evolution history.YANG Wencai 1 , YANG Wuyang 1 , JIN Zhenmin 2 & CHENG Zhenyan 1 1. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China 2. China University of Geosciences, Wuhan 430074, China 2005Science China Earth Sciences2005,48,5:13
7Partial Melting and Its Implications for Understanding the Seismic Velocity Structure within the Southern Tibetan Crust显示文摘In order to constrain the crustal wave velocity structure in the southern Tibetan crust and provide insight into the contribution of crustal composition, geothermal gradient and partial melting to the velocity structure, which is characterized by low average crustal velocities and widespread presence of low-velocity zone(s), the authors model the crustal velocity and density as functions of depth corresponding to various heat flow values in light of velocity measurements at high temperature and high pressure. The modeled velocity and density are regarded as comparison standards. The comparison of the standards with seismic observations in southern Tibet implies that the predominantly felsic composition at high heat flow cannot explain the observed velocity structure there. Hence, the authors are in favor of attributing low average crustal velocities and low-velocity zone(s) observed in southern Tibet mainly to partial melting. Modeling based on the experimental results suggests that a melting percentage of 7-12 could account for the low-velocity zone(s).YANG Xiaosong, MA Jin, JIN Zhenmin, GAO Shan and MA Shengli Geology Institute, China Seismological Bureau, Beijing 100029 Laboratory of Tectonophysics, China Seismological Bureau, Beijing 100029 Faculty of Earth Sciences, China University of Geosciences, Wuhan, Hubei 430074 2003Acta Geologica Sinica(English Edition)2003,77,1:13
8GIS-based Analysis for Hotspot Identification of Tradeoff Between Ecosystem Services: A Case Study in Yanhe Basin, China显示文摘Although the quantification and valuation of ecosystem services have been studied for a long time, few studies have specifically focused on the quantification of tradeoffs between ecosystem services and tradeoff hotspots. Based on previous studies of ecosystem service assessment, we proposed a feasible method to analyze the tradeoffs between ecosystem services, including determination of their relationship, quantification of tradeoffs, and identification of tradeoff hotspots. Potential influencing factors were then further analyzed. The Yanhe Basin in the Loess Plateau was selected as an example to demonstrate the application process. Firstly, the amounts of net primary production(NPP) and water yield(WY) in 2000 and 2008 were estimated by using biophysical models. Secondly, correlation analysis was used to indicate the tradeoffs between NPP and WY. Thirdly, tradeoff index(TI_(NPP/WY)) was established to quantify the extent of tradeoffs between NPP and WY, and the average value of TI_(NPP/WY) is 24.4 g/(mm·m^2) for the Yanhe Basin between 2000 and 2008. Finally, the tradeoff hotspots were identified. The results indicated that the area of lowest tradeoff index concentrated in the middle part of the Yanhe Basin and marginal areas of the southern basin. Map overlapping was used for preliminary analysis to seek potential influencing factors, and the results showed that shrub was the best suited for growing in the Yanhe Basin, but also was a potential influencing factor for formulation of the tradeoff hotspots. The concept of tradeoff index could also be used to quantify the degree of synergy between different ecosystem services. The method to identify the tradeoff hotspots could help us to narrow the scope of study area for further research on the relationship among ecosystem services and concentrate on the potential factors for formation of tradeoff between ecosystem services, enhance the capacity to maintain the sustainability of ecosystem.ZHENG Zhenmin FU Bojie FENG Xiaoming 2016Chinese Geographical Science2016,26,4:12
9Effect of deformation and cooling rate on the transformation behavior and microstructure of X70 steels显示文摘The effects of the deformation in the non-recrystallization region of austenite and the cooling rate on the transformation behavior and microstructure of low-carbon low-alloy steel for pipeline application were studied on the thermal-mechanical simulator Gleeble-1500. It was shown that an increase in deformation amount can greatly increase the nucleation site of ferrite when deformed in the non-recrystallization region of austenite, and an increase in nucleation ratio can greatly refine grains. When the cooling rate is accelerated, the driving force of nucleation is increased and the nucleation rate also improves. Ultra-refine grains can be obtained by controlled rolling. The high density of ferrite nucleus, which forms along the austenite grain boundary, twin interface, and deforma- tion band are introduced in the matrix of austenite by the control of hot rolling, after which the microstructure can be refined. It was found that the acicular ferrite has a very fine sub-structure, high dislocation density, and a thin slab with ultra-fine grains. Small M/A islands and cementite are precipitated on the matrix of the slabs by the analysis technique of TEM and SEM.Zhiping Zhao Zhenmin Wang Hongmei Zhang Lifeng Qiaol 2007Journal of University of Science and Technology Beijing2007,14,5:11
10Chromosomal localization of the major ribosomal RNA genes in scallop Chlamys farreri显示文摘The chromosomes of Chlamys farreri were analyzed by means of silver staining and fluorescence in situ hybridization (FISH) with 18S—28S rDNA probe. Probe was made by PCR amplification of a DNA fragment containing internal transcribed spacers ITS1 between 18S and 5.8S ribosomal RNA gene, ITS2 between 5.8S and 28S ribosomal RNA gene and 5.8S rRNA gene, and labeled by PCR incorporation of bio-16-dUTP. FISH signals were located on the short arm of subtelocentric chromosome 10. After silver-staining, nucleolus organizer regions (NORs) could be observed on the telomere of the short arm of chromosome 10. However, one metaphase spread displayed an additional silver spot on the short arm of subtelocentric chromosome 12.HUANG Xiaoting BAO Zhenmin BI Ke HU Jingjie ZHANG Can ZHANG Quanqi HU Xiaoli 2006Acta Oceanologica Sinica2006,25,3:10
11Development of Light Cycle Oil(LCO) Hydrocracking Technology over a Commercial W-Ni Based Catalyst显示文摘Because of its high density and low cetane number, the light cycle oil(LCO) containing heavy aromatics(60%—80%) can hardly be transformed through the conventional hydro-upgrading technology. In this report, a novel LCO hydrocracking technology(FD2G) was proposed for the utilization of LCO to manufacture high value-added products. Through the ingenious combination of hydroprocessing catalyst and the hydrocracking process, the high octane gasoline and the ultra-low sulfur diesel(ULSD) blendstocks were produced simultaneously. The influence of catalyst type, reaction temperature, pressure, respectively, on the research octane number(RON) of produced gasoline was studied in a fixed bed hydrogenation reactor. It indicated that high reaction temperature and medium pressure would favor the production of highoctane gasoline through the conversion of bi-aromatic and tri-aromatic hydrocarbons. The typical results of FD2 G technology on commercial units showed that it could produce clean diesel with a sulfur content of less than 10 μg/g and clean gasoline with a research octane number(RON) of up to 92. It would be contributed to the achievement of the maximum profit of a refinery, the FD2 G technology could provide a higher economic efficiency than the other diesel quality upgrading technology under the current gasoline and diesel price system.Peng Chong Yang Xuejing Fang Xiangchen Huang Xinlu Cheng Zhenmin Zeng Ronghui Guo Rong 2015China Petroleum Processing & Petrochemical Technology2015,17,4:9
12Existence of Microsatellites in Expressed Sequence Tags of Common Carp (Cyprinus carpio L.) Available in GenBank dbEST Database显示文摘表示顺序标注的普通鲤鱼(EST ) 为存在 ofmicrosatellites,或简单顺序重复(SSR ) 被分析。在 NCBI dbEST 数据库, 10612sequences 的一个总数在 2004 年 12 月 31 日前被登记。2-6 nucleotidemicrosatellites 的完全的搜索导致了 513 包含 SSR EST 的鉴定,为 4.8% 总数的财务。聚合分析显示包含 SSR EST 的 73 个序列掉进 27 个组并且留下 440 EST 是独立的。467 唯一的包含 SSR EST 的一个总数被识别。这些 EST-SSRs 包含了许多简单顺序类型,并且 di-nucleotiderepeats 和 tri-nucleotiderepeats 是最丰富的,为 42.1% 全部和 27.9% 的财务分别地。thedinucleotide 重复, CA/TG 是最丰富的,由 GA/TC 列在后面。BLASTx 搜索证明 SSR loci 的 that38.1% 能与基因或蛋白质被联系知道或包含 SSR EST 的未知 function.BLASTx 搜索也在 zebrafishsequences 上显示出点击的高频率(98/179 ) 。HU Jingjie WANG Xiaolong HU Xiaoli BAO Zhenmin 2006Journal of Ocean University of China2006,5,1:8
13Type 1 CD8^+ T Cells are Superior to Type 2 CD8^+ T Cells in Tumor Immunotherapy due to Their Efficient Cytotoxicity,Prolonged Survival and Type 1 Immune Modulation显示文摘CD8+ cytotoxic T(Tc) cells play a crucial role in host immune responses to cancer,and in this context,adoptive CD8+ Tc cell therapy has been studied in numerous animal tumor models. Its antitumor efficacy is,to a large extent,determined by the ability of Tc cells to survive and infiltrate tumors. In clinical trials,such in vitro-activated T cells often die within hours to days,and this greatly limits their therapeutic efficacy. CD8+ Tc cells fall into two subpopulations based upon their differential cytokine secretion. In this study,we in vitro generated that ovalbumin(OVA) -pulsed dendritic cell(DCOVA) -activated CD8+ type 1 Tc(Tc1) cells secreting IFN-γ,and CD8+ type 2 Tc(Tc2) cells secreting IL-4,IL-5 and IL-10,which were derived from OVA-specific T cell receptor(TCR) transgenic OT I mice. We then systemically investigated the in vitro and in vivo effector function and survival of Tc1 and Tc2 cells,and then assessed their survival kinetics after adoptively transferred into C57BL/6 mice,respectively. We demonstrated that,when compared to CD8+ Tc2,Tc1 cells were significantly more effective in perforin-mediated cytotoxicity to tumor cells,had a significantly higher capacity for in vivo survival after the adoptive T cell transfer,and had a significantly stronger therapeutic effect on eradication of well-established tumors expressing OVA in animal models. In addition,CD8+ Tc1 and Tc2 cells skewed the phenotype of CD4+ T cells toward Th1 and Th2 type,respectively. Therefore,the information regarding the differential effector function,survival and immune modulation of CD8+ Tc1 and Tc2 cells may provide useful information when preparing in vitro DC-activated CD8+ T cells for adoptive T cell therapy of cancer.Zhenmin Ye Chaoke Tang Shulin Xu Bei Zhang Xueshu Zhang Terence Moyana Jicheng Yang Jim Xiang 2007Cellular & Molecular Immunology2007,4,4:8
14Explosive limits of mixed gases containing CH_4,CO and C_2H_4 in the goaf area显示文摘The explosive gases CO and C2H4, released mainly flammable gases during the process of coal self-ignition, are of the most important ingredients of the multi-component gases in goaf areas, along with CH4. We have determined some of the parameters of explosive properties of the one-component gases CH4, CO and C2H4 using an explosive trial device of polybasic explosive gas mixtures and emphasized particularly the effect on the limits of explosive concentration of the binary explosive mixed gases CH4+CO, CH4+C2H4, as a function of the amount of CO, C2H4 and inert flame resisting gases (N2, CO2). The experimental results show that the effect of inert gases on the explosive limits of mixed gases, given the property of explosive gas, is obvious: the inert gases (N2, CO2) possess some inhibitory effects on the explosion of the multi-component explosive gas mixtures. The results will provide some experimental support to suppress the occurrence of the gas explosions in goaf areas and provide some directions for designing explosion-proof electric equipment and fire arresters.DENG Jun LUO Zhenmin WU Xiaochun HU Yaoyuan 2010Mining Science and Technology2010,20,4:8
15Assessing genetic diversity of wild populations of Japanese flounderusing AFLP markers显示文摘Amplified fragment length polymorphism (AFLP) analysis was used to evaluate the genetic diversity of four wild geographical populations of Japanese flounder (Paralichthys olivaceus). A total of 775 loci (58.32% of which was polymorphic) in the range between 100 and 1 300 base pairs were detected from 110 individuals using seven primer combinations. The percentage of polymorphic loci detected by single primer combination for each population was calculated, ranging from 19.59% to 53.33%. Genetic similarities within and among the populations were calculated from the binary matrices of presence-absence. Phylogenetic tree of four populations was constructed by using the UPGMA method using PHYLIP Version 3.5. According to intrapopulation genetic similarities, CW population displayed the highest genetic diversity value and KY population had the lowest genetic diversity value. The distance between CW and CF populations was the farthest, which was possibly resulted from the farthest distance of Weihai of Shandong and Fujian of China compared with the geographical distance between other locations of populations. The subpopulation differentiation value (G_ st ) is 0.356 5, showing a certain extent of differentiation among the four geographical populations. AFLP technology was confirmed to be an effective tool to assess within-and among-population genetic diversity of Japanese flounder. The present survey provided significant insights for research in the Japanese flounder breeding program.XU Xiaofei ZHANG Quanqi WANG Zhigang QI Jie ZHANG Zhifeng BAO Zhenmin Heisuke Nakagawa 2006Acta Oceanologica Sinica2006,25,3:7
16Hydrogen production from steam reforming of methanol over CuO/ZnO/Al_2O_3 catalysts: Catalytic performance and kinetic modeling显示文摘A series of CuO/ZnO/Al_2O_3, CuO/ZnO/ZrO_2/Al_2O_3 and CuO/ZnO/CeO_2/Al_2O_3 catalysts were prepared by coprecipitation and characterized by N_2 adsorption, XRD, TPR, N_2O titration and HRTEM. The catalytic performances of these catalysts for the steam reforming of methanol were evaluated in a laboratory-scale fixed-bed reactor at 0.1 MPa and temperatures between 473 and 543 K. The results showed that the catalytic activity depended greatly on the catalyst reducibility and the specific surface area of Cu. An approximate linear correlation between the catalytic activity and the Cu surface area was found for all catalysts investigated in this study.Compared to CuO/ZnO/Al_2O_3, the ZrO_2-doped CuO/ZnO/Al_2O_3 exhibited higher activity and selectivity to CO,while the CeO_2-doped catalyst displayed lower activity and selectivity. Finally, an intrinsic kinetic study was carried out over a screened CuO/ZnO/CeO_2/Al_2O_3 catalyst in the absence of internal and external mass transfer effects. A good agreement was observed between the model-derived effluent concentrations of CO(CO_2) and the experimental data. The activation energies for the reactions of methanol-steam reforming, water-gas shift and methanol decomposition over CuO/ZnO/CeO_2/Al_2O_3 were 93.1, 85.1 and 116.5 k J·mol^(-1), respectively.Yu Wan Zhiming Zhou Zhenmin Cheng 2016Chinese Journal of Chemical Engineering2016,24,9:7
17Circular RNA circStag1 promotes bone regeneration by interacting with HuR显示文摘Postmenopausal osteoporosis is a common bone metabolic disorder characterized by deterioration of the bone microarchitecture,leading to an increased risk of fractures.Recently,circular RNAs(circ RNAs)have been demonstrated to play pivotal roles in regulating bone metabolism.However,the underlying functions of circ RNAs in bone metabolism in postmenopausal osteoporosis remain obscure.Here,we report that circ Stag1 is a critical osteoporosis-related circ RNA that shows significantly downregulated expression in osteoporotic bone marrow mesenchymal stem cells(BMSCs)and clinical bone tissue samples from patients with osteoporosis.Overexpression of circ Stag1 significantly promoted the osteogenic capability of BMSCs.Mechanistically,we found that circ Stag1 interacts with human antigen R(Hu R),an RNA-binding protein,and promotes the translocation of Hu R into the cytoplasm.A high cytoplasmic level of Hu R led to the activation of the Wnt signaling pathway by stabilizing and enhancing low-density lipoprotein receptor-related protein 5/6(Lrp5/6)andβ-catenin expression,thereby stimulating the osteogenic differentiation of BMSCs.Furthermore,overexpression of circ Stag1 in vivo by circ Stag1-loaded adeno-associated virus(circ Stag1-AAV)promoted new bone formation,thereby preventing bone loss in ovariectomized rats.Collectively,we show that circ Stag1 plays a pivotal role in promoting the regeneration of bone tissue via Hu R/Wnt signaling,which may provide new strategies to prevent bone metabolic disorders such as postmenopausal osteoporosis.Gaoyang Chen Canling Long Shang Wang Zhenmin Wang Xin Chen Wanze Tang Xiaoqin He Zhiteng Bao Baoyu Tan Jin Zhao Yongheng Xie Zhizhong Li Dazhi Yang Guozhi Xiao Songlin Peng 2022Bone Research2022,10,3:7
18The quality traceability system for prefabricated buildings using blockchain:An integrated framework显示文摘The quality traceability of precast components has largely affected the widespread adoption of prefabricated buildings.Blockchain technology provides an effective solution to change the centralized storage mode of traditional traceability system and its related disadvantages.In this paper,we propose a framework of quality traceability system for precast components based on blockchain technology.The system framework adopts a hybrid blockchain architecture and dual storage mode,defines three types of smart contracts,and creates an interactive and efficient source tracing query method,which could effectively achieve the goals of decentralization,openness,and non-tamperability,as well as efficient traceability.Ziyao ZHANG Zhenmin YUAN Guodong NI Han LIN Yujie LU 2020Frontiers of Engineering Management2020,7,4:5
19Stable isotope analysis of water sources for Tamarix laxa in the mega-dunes of the Badain Jaran Desert, China显示文摘The complex interactions in desert ecosystems between functional types and environmental conditions could be reflected by plant water use patterns. However, the mechanisms underlying the water use patterns as well as the water sources of Tamarix laxa in the mega-dunes of the Badain Jaran Desert, China, remain unclear. This study investigated the water sources and water use patterns of T. laxa using the stable oxygen isotope method. The δ^(18)O values of xylem water, soil water in different layers(0–200 cm), rainwater, snow water, lake water, atmospheric water vapor, condensate water, and groundwater were measured. The sources of water used by T. laxa were determined using the IsoSource model. The results indicate that T. laxa mainly relies on soil water. At the beginning of the growing season(in May), the species is primarily dependent on water from the middle soil layer(60–120 cm) and deep soil layer(120–200 cm). However, it mainly absorbs water from the shallow soil layer(0–60 cm) as the rainy season commences. In September, water use of T. laxa reverts to the deep soil layer(120–200 cm). The water use patterns of T. laxa are closely linked with heavy precipitation events and soil water content. These findings reveal the drought resistance mechanisms of T. laxa and are of significance for screening species for ecological restoration.ZHANG Jinhu WANG Nai'ang NIU Zhenmin SUN Jie DONG Chunyu ZHANG LyuLyu 2018Journal of Arid Land2018,10,6:5
20New Layered SOA-Based Architecture for Multi-robots Cooperative Online SLAM显示文摘A new layered multi-robots architecture for cooperative online simultaneous localization and mapping based on Service-oriented architecture(SOA) is proposed. This architecture is constructed by the concepts of service-oriented and loosely coupled center scheduling.These methods make robots' underlying function realization be transparent in cooperation and avoid the impact affected by robot heterogeneous characteristics, which will be beneficial to the system construction, expansion, restructuring and maintenance. All data packages follow the SOA unified data format, which can avoid the impact affected by sensor heterogeneous characteristics. The point to point serving model reduces the path of data transmission which can improve the timeliness of the system. All of these features can satisfy the requirements of multi-robots cooperative online SLAM. The simulation results show the feasibility, applicability and practicability of this architecture.CAI Yunfei TANG Zhenmin ZHAO Chunxia 2014Chinese Journal of Electronics2014,23,1:5
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