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| 1 | Forest Ecosystem Services and Their Values in Beijing显示文摘As the most important ecosystem in Beijing, the forest supports a lot of ecosystem services to local and around communities, which plays a key role in the maintenance of urban ecological security.However, the valuation on the forest ecosystem services based on regional scale could not provide precise and reasonable values for forestry sector management.In this study, we estimated the magnitudes and economic values of the forest ecosystem services in Beijing at sublot level.The economic value of forest ecosystem services in Beijing was estimated to be 19 339.71×10 6 yuan(RMB) in 2004.Among all the ecosystem services indicators we estimated in this study, only fruit, timber and part of the recreation(which only include the tourism income from the forest parks and scenic areas, but not include that from other forest types) were measured in the social economic system.As estimated in this study, more than 82.19% of the economic value of forest ecosystem services could not be measured in the socio-economic statistical system.The importance of forest ecosystem services in Beijing to human welfare was underestimated by the socio-economic system.Therefore, the policies about the eco-compensation of forest ecosystem services should be established to maintain the sustainable supply of the forest ecosystem services in Beijing. | XIE Gaodi LI Wenhua XIAO Yu ZHANG Biao LU Chunxia AN Kai WANG Jixing XU Kang WANG Jinzeng | 2010 | Chinese Geographical Science2010，20，1： | 18 |
| 2 | Synthesis and kinetics investigation of meso-microporous Cu-SAPO-34 catalysts for the selective catalytic reduction of NO with ammonia显示文摘A series of meso-microporous Cu-SAPO-34 catalysts were successfully synthesized by a one-pot hydrothermal crystallization method, and these catalysts exhibited excellent NH_3-SCR performance at low temperature. Their structure and physic chemical properties were characterized by means of X-ray diffraction patterns(XRD), Scanning electron microscopy(SEM), Transmission electron microscopy(TEM), N_2 sorption-desorption, nuclear magnetic resonance(NMR), Inductively Coupled Plasma-Atomic Emission spectrometer(ICP-AES), X-ray absorption spectroscopy(XPS),Temperature-programmed desorption of ammonia(NH_3-TPD), Ultraviolet visible diffuse reflectance spectroscopy(UV-Vis DRS) and Temperature programmed reduction(TPR).The analysis results indicate that the high activities of Cu-SAPO-34 catalysts could be attributed to the enhancement of redox property, the formation of mesopores and the more acid sites. Furthermore, the kinetic results verify that the formation of mesopores remarkably reduces diffusion resistance and then improves the accessibility of reactants to catalytically active sites. The 1.0-Cu-SAPO-34 catalyst exhibited the high NO conversion(> 90%) among the wide activity temperature window in the range of 150–425℃. | Jixing Liu Fuhong Yu Jian Liu Lifeng Cui Zhen Zhao Yuechang Wei Qianyao Sun | 2016 | Journal of Environmental Sciences2016，28，10： | 8 |
| 3 | Si/C Composites as Negative Electrode for High Energy Lithium Ion Batteries显示文摘硅很为因为它的高特定的能力,中等潜力,环境友好,和低费用,改进锂离子电池(解放) 的精力密度正在答应否定电极材料。然而, Si 否定电极的体积变化在导致弄成粉,低骑车效率,和永久能力损失的 lithiation/delithiation 过程期间是巨大的。以便克服这个问题,巨大的努力被尝试了。在他们之中,最成功的策略是把另外的部件合并到硅形成合成的,特别碳媒介。在这微型评论,用作解放的否定电极的 Si/C 材料上的最近的进步被总结例如 Si/amorphous 碳合成, Si/graphene composites, Si/carbon nanotubes 或纤维 composites。制造,结构,不同 Si/C composites 的电气化学的表演被讨论。另外,一些未来方向被指出。 | Yi Zhang Yusong Zhu Lijun Fu Jixing Meng Nengfei Yu Jing Wang Yuping Wu | 2017 | Chinese Journal of Chemistry2017，35，1： | 8 |
| 4 | Study on S-shaped characteristic of Francis reversible unit by on-site test and CFD simulation显示文摘The operation parameters (vibration, shaft displacement and pressure fluctuation) of No. 1 Francis reversible unit of Baoquan pumped-storage power station were measured on site in the no-load mode at net heads of 518.04, 522.01 and 530.38 m, respectively. The rotational speed fluctuations in the no-load mode at three net heads were beyond synchronization requirement with obvious S-shaped characteristic, and misaligned guide vanes (MGV) had to be put into use for synchronization. Further analysis demonstrated that the rotating frequency signal was generally dominant in vibration and shaft displacement mixing signal in the no-load mode, while the frequency domain was wide without an obvious main frequency in pressure fluctuation mixing signal. Besides, the SST k-ω turbulence model was adopted to simulate the four quadrant characteristic curves of Baoquan model pump-turbine at three gate openings, and the relative error between simulation results and model test data was within ±6%, indicating that the simulation method in this paper is feasible and S-shaped characteristic of the pump-turbine can be simulated with CFD method. | LI JinWei HU QingJuan YU JiXing LI QiZhang | 2013 | Science China(Technological Sciences)2013，56，9： | 5 |
| 5 | One pot synthesis, crystal structures and properties of two new MOFs with imidazole-containing tripodal ligand显示文摘Two new different Cu(Ⅱ) MOFs with the same 1,3,5-tris(1-imidazolyl) benzene(tib) ligand {[Cu(tib)2]·(H2O)2·Br2}n(1) and {[Cu2(tib)·Br·Cl]·2Br}n(2) were obtained by one pot synthesized of tib with CuBr in the presences of HCl and water. X-ray single crystal diffraction analyses indicate that both complexes 1 and 2 have two dimensional frameworks containing different building blocks. Each Cu(Ⅱ) atom in complex 1 is coordinated by four N atoms from different tib ligands. However, there are two different cryptographic Cu(Ⅱ) atoms in complex 2, one is four coordinated by two bromine atoms and two N atoms from different tib ligands, the other is six coordinated by two chloride atoms and four N atoms from different tib ligands. The thermal gravimetric analysis of complexes 1 and 2 are depicted in the paper. | TANG YunZhi YU YinMei XIONG JianBo YAO Qiong TAN YuHui GAO JiXing WEN HeRui | 2014 | Science China Chemistry2014，57，11： | 2 |
| 6 | Single-cell brain atlas of Parkinson's disease mouse model显示文摘Parkinson's disease(PD)is a neurodegenerative disease,leading to the impairment of movement execution.PD pathogenesis has been largely investigated,either limited to bulk transcriptomic levels or at certain cell types,which failed to capture the cellular heterogeneity and intrinsic interplays among distinct cell types.Here,we report the application of single-nucleus RNA-seq on midbrain,striatum,and cerebellum of theα-syn-A53 T mouse,a well-established PD mouse model,and matched controls,generating the first single cell transcriptomic atlas for the PD model mouse brain composed of 46,174 individual cells.Additionally,we comprehensively depicte the dysfunctions in PD pathology,covering the elevation of NF-k B activity,the alteration of ion channel components,the perturbation of protein homeostasis network,and the dysregulation of glutamatergic signaling.Notably,we identify a variety of cell types closely associated with PD risk genes.Taken together,our study provides valuable resources to systematically dissect the molecular mechanism of PD pathogenesis at the single-cell resolution,which facilitates the development of novel approaches for diagnosis and therapies against PD. | Jixing Zhong Gen Tang Jiacheng Zhu Weiying Wu Ge Li Xiumei Lin Langchao Liang Chaochao Chai Yuying Zeng Feiyue Wang Lihua Luo Jiankang Li Fang Chen Zhen Huang Xiuqing Zhang Yu Zhang Hongde Liu Xin Qiu Shengping Tang Dongsheng Chen | 2021 | Journal of Genetics and Genomics2021，48，4： | 1 |
| 7 | The characteristic of sound propagation in deep water and underwater source localization in the direct zone显示文摘The multiple-path sound propagation in deep water is conducive to source localization of an underwater target.The transmission losses(TLs) and broadband pulse multiple-path propagation characteristics from a deep receiver is analyzed by using the experimental data from deep water area in the South China Sea(SCS).The results indicate that the width of the direct zone near the bottom of 4300 m water depth is about 30 km.The TLs in the direct zone near the bottom are much less than those in the shadow zone.It is meaningful for underwater sound source detection.Moreover,the time delay between the direct path and the bottomsurface-reflected path for a receiver near the bottom decreases monotonically with the source range.According to the linear relationship between the time delay of multipath and source range,a source localization method is presented to estimate the range of underwater target.The experimental results show that the estimated ranges are consistent with the global position system(GPS) measurements,and the mean square error of the estimation results is less than 0.28 km. | WANG Mengyuan LI Zhenglin WU Shuanglin QIN Jixing YU Yanxin | 2019 | Chinese Journal of Acoustics2019，38，4： | 1 |
| 8 | Experimental investigations of a prototype reversible pump turbine in generating mode with water head variations显示文摘Influences of water head variations on the performances of a prototype reversible pump turbine are experimentally studied in generating mode within a wide range of load conditions(from 25% to 96% of the rated power). The pressure fluctuations of the reversible pump turbine at three different water heads(with non-dimensional values being 0.48, 0.71 and 0.90) are measured and compared based on the pressure data recorded in the whole flow passage of the turbine. Furthermore, effects of monitoring points and load variations on the impeller-induced unstable behavior(e.g. blade passing frequency and its harmonics) are quantitatively discussed. Our findings reveal that water head variations play a significant role on the pressure fluctuations and their propagation mechanisms inside the reversible pump turbine. | LI JinWei ZHANG YuNing YU JiXing | 2018 | Science China(Technological Sciences)2018，61，4： | 1 |
| 9 | Study on the Management System of Enterprise's Scientific and Technical Innovation显示文摘 | Jixing Yu Muyou Sun | 2004 | China-USA Business Review2004，3，2： | 0 |
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