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Clustering gully profiles for investigating the spatial variation in landform formation on the Chinese Loess Plateau

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Journal of Mountain Science 2021年第10期18卷 2742-2760页

作者： CHENG Yao li jing-wei XIONG li-yang TANG Guo-an Key Laboratory of Virtual Geographic Environment(Nanjing Normal University) Ministry of EducationNanjing 210023China School of Geography Nanjing Normal UniversityNanjing 210023China Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Nanjing 210023China

The gully is the most dynamic and changeable landform unit on the Loess Plateau,and the characteristics of gully landforms are key indicators of gully *** gully profiles are connected and combined through runoff ***,it is necessary to cluster gully profiles into a gully profile combination(GPC)to reveal the spatial variation in gully landforms throughout the Loess ***,the gradient and gully evolution index(GEI)of two sample areas in Changwu and Suide in Shaanxi Province,China are calculated and analysed based on ***,the gradient and GEI are calculated by using 90-m-resolution digital elevation model(DEM)data for the severe soil erosion area with the basin as the research *** this basis,the spatial variation in the development degree is analysed with Getis-Ord Gi*.The results show that the degree of gully undercutting decreases from southeast to northwest under the influence of *** to the soil properties,the loess in the northwest is more prone to collapse,resulting in the decrease of GEI from northwest to *** development degree of gullies is closely related to *** strong erosive capacity of rivers leads to greater differences in gullies within the *** the same time,the skewness and kurtosis of the gully index in the basin are correlated;when the distribution of the gully index in the basin is less normal,the distribution of the gully index is more *** results reveal the spatial variation characteristics of the Loess Plateau based on GPC.

关键词： Gully profile combination Spatial variation Digital elevation model Loess landform Terrain analysis

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A New Route for Synthesis of Entecavir

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Chinese Chemical Letters 2006年第7期17卷 907-910页

作者： li wei GUO Yuan jing XIAO li Ping YANG Department of chemistry East China Normal University Shanghai 200062

A new economical synthetic route of the key intermediate 6. The synthesis of a modified Mitsunobu reaction. of entecavir was presented, involving the preparation 6 was conveniendy achieved in good overall yield by a m... 详细信息

关键词： Entecavir new route synthesis.

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Dual Phase Heat Treatment of Low-Alloy Steel

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Journal of Iron and Steel Research International 2005年第5期12卷 47-51页

作者： HAN Jian-min CUI Shi-hai li wei-jing MA Xiao-yan Beijing Jiaotong University Beijing 100044 China

Dual phase heat treatment is an economical and effective way for improving the properties of low carbon steels and low-alloy steel materials. In this paper, the microstructures and mechanical properties of 20MnSi steel treated by different dual phase heat treatment have been studied. The results show that dual phase heat treatment with pre-quenching technique and then heating from room temperature to the critical zone can achieve finer and more homogeneous microstructure than that with pre-normalizing technique and then cooling from austenite zone to the critical zone. Among all factors affecting dual phase heat treatment, quenching temperature at the critical zone and tempering temperature play an important part in mechanical properties. Using proper dual phase heat treatment technique with computer optimized parameters, the yield strength, the elongation and impact toughness of 20MnSi can reach 860 MPa, 16% and 207 MPa respectively.

关键词： low-alloy steel dual phase heat treatment microstructure optimization

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Evaluation of Curvularia lunata Strain B6 as a Potential Mycoherbicide to Control Barnydrgrass (Echinochloa crus-galli)

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Journal of Integrative Agriculture 2013年第7期12卷 1201-1207页

作者： li jing wei Tao SUN Ai-rui NI Han-wen College of Agronomy and Biotechnology China Agricultural University

The virulent strain B6 of Curvularia lunata was screened out from 65 fungus strains isolated from the diseased leaves of barnyardgrass （Echinochloa crus-galli）. Greenhouse and field studies were conducted to evaluate the feasibility of the strain being exploited as a mycoherbicide for barnyardgrass control in paddy fields. The results of pathogenicity experiments showed that this strain was highly pathogenic to barnyardgrass at the 1- to 2.5-leaf stages. The fresh weight reduction increased with the increase of inoculated conidial concentrations and the prolongation of dew duration. Strain B6 provided excellent barnyardgrass control when it was applied at the concentration of 1×104-1×106 conidia mL-1 in paddy fields with water layer. This strain was very safe to rice and the most plant species except wheat, barley and corn. Findings of this study indicated that this strain could be a potential mycoherbicide for barnyardgrass control in paddy fields in the future.

关键词： barnyardgrass Curvularia lunata biological control mycoherbicide rice

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Representation of the Arctic Oscillation in the CMIP5 Models

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Advances in Climate Change Research 2013年第4期4卷 242-249页

作者： ZUO Jin-Qing li wei-jing REN Hong-li Chinese Academy of Meteorological Sciences Laboratory for Climate Studies National Climate CenterChina Meteorological Administration

The temporal variability and spatial pattern of the Arctic Oscillation(AO)simulated in the historical experiment of26 coupled climate models participating in the Coupled Model Intercomparison Project Phase 5(CMIP5)are *** analysis of the monthly AO index indicates that 23 out of the 26 CMIP5 models exhibit no statistically significant spectral peak in the historical experiment,as seen in the *** models are able to reproduce the AO pattern in the sea level pressure anomaly field during boreal winter,but the intensity of the AO pattern tends to be overestimated in all the *** zonal-mean zonal wind anomalies associated with the AO is dominated by a meridional dipole in the mid-high latitudes of the Northern Hemisphere during boreal winter,which is well reproduced by only a few *** models show significant biases in both strength and location of the dipole compared to the *** considering the temporal variability as well as spatial structures in both horizontal and vertical directions,the MPI-ESM-P model reproduces an AO pattern that resembles the observation the best.

关键词： Arctic Oscillation model evaluation coupled climate model CMIP5

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Phosphite ligand Modified Supported Rhodium Catalyst for Hydroformylation of Internal Olefins to linear Aldehydes

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Chemical Research in Chinese Universities 2009年第5期25卷 738-739页

作者： li Xian-ming DING Yun-jie JIAO Oui-ping li jing-wei YAN li ZHU He-jun Laboratory of Applied Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P R. China State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P R. China Graduate School of Chinese Academy of Sciences Beijing 100049 P R. China

A phosphite ligand modified heterogeneous catalyst was developed for the hydroformylation of internal olefins to linear aldehydes, which showed a high activity and high regioselectivity and could be separated easily by filtration after reaction in an autoclave. Three nanoporous silica sieves were used to investigate the influence of pore structure and shape selective performance of support on the regioselectivity to the linear products.

关键词： Phosphite ligand Hydroformylation Internal olefin Shape selective performance

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Kinetics of Reduction Reaction in Micro-Fluidized Bed

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Journal of Iron and Steel Research International 2012年第6期19卷 6-8页

作者： liN Yin-he GUO Zhan-cheng TANG Hui-qing REN Shan li jing-wei State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

Micro-fluidized bed reactor is a new research method for the reduction of iron ore fines. The reactor is op- erated as a differential reactor to ensure a constant gas concentration and temperature within the reactor volume. In order to understand the dynamic process of the reduction reaction in micro-fluidized bed, a series of kinetic experi- ments were designed. In the micro fluidized bed, the use of shrinking core model describes the dynamic behavior of reduction of iron ore. And the apparent activation energy is calculated in the range of 700--850 ~C while the initial atmosphere is 100% content of CO.

关键词： iron ore reduction micro-fluidized bed dynamics

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RELATIONSHIP BETWEEN SUMMER LOW-FREQUENCY RAINFALL OVER SOUTHERN CHINA AND PROPAGATION OF TROPICAL INTRASEASONAL OSCILLATION

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Journal of Tropical Meteorology 2018年第1期24卷 92-101页

作者： SHEN Yu-yang REN Hong-li li wei-jing ZHANG Yu-jie ZUO Jin-qing Public Meteorological Service Centre China Meteorological AdministrationBeijing 100081 China Laboratory for Climate Studies&CMA-NJU Joint Laboratory for Climate Prediction Studies National Climate CenterChina Meteorological AdministrationBeijing 100081 China Department of Atmospheric Science School of Environmental StudiesChina University of GeoscienceWuhan 430074 China Beijing Meteorological Bureau Beijing 100089 China

This study investigates the relationship between summer low-frequency rainfall over southern China and tropical intraseasonal oscillation(ISO) in the atmosphere by examining systematically the propagation features of the tropical ISO in terms of focusing on five large-scale low-frequency rainfall regimes in summer over southern China. It is demonstrated that there is a close linkage between the five rainfall regimes over southern China and the northward propagation of the tropical ISO. The moist ISO signals, which influence the low-frequency rainfall events in different regions of southern China, mainly propagate northwestward from the tropical ocean to the southeast of China. The southeast China rainfall regime is intimately associated with the moist ISO signals propagating northwestward from the equatorial mid-western Pacific Ocean. For both the Yangtze River regime and South of Yangtze River regime, the moist ISO signals over the northern South China Sea show an evident northward propagation towards the Yangtze River region, and then propagate westward. It is further found that the interaction between the northward propagation of low-latitude ISO signals and the southward propagation of high-latitude ISO signals can also make a clear influence on the low-frequency rainfall in southern China. For the Southern China regime, the moist ISO signals show a significant northward propagation from the Philippines. Moreover, for the rainless regime, southern China is under dry ISO signals' control, and the latter shows no clear propagation to southern China. This study may provide insights for the extended-range forecasting of summer rainfall in southern China.

关键词： summer low-frequency rainfall intraseasonal oscillation propagation composite analysis

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Strong Growth and Inflation Today

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China's Foreign Trade 2010年第14期 38-40页

作者： li wei jing Tan Economists with Standard Chartered Bank （China）limited

Inflation pressures still bubbling, and there is still risk of a rate hike or twoIndustrial production and fixed asset investment growth slowed, but momentum stillseems strongPolicy tightening, especially in terms of ... 详细信息

关键词：通货膨胀固定资产投资膨胀压力房地产

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Construction, expression and characterization of the engineered antibody against tumor surface antigen, p185c-erbB-2

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Cell Research 2003年第1期13卷 35-48页

作者： liAN SHENG CHENG, AI PING liU, JIA HONG YANG, YAN QIU DONG, liANG wei li, jing WANG, CHAO CHEN WANG, jing liUSchool of life Science, University of Science and Technology of China, Hefei 230027, China School of life Science University of Science and Technology of China Hefei China

The c-erbB-2 proto-oncogene encodes a 185kDa protein p!85, which belongs to epidermal growth factor receptor family. Amplification of this gene has been shown to correlate with poor clinical prognosis for certain cancer patients. The monoclonal antibody A21 which directed against p185 specifically inhibits proliferation of tumor cells overexpressing p185, hence allows it to be a candidate for targeted therapy. In order to overcome several drawbacks of murine MAb, we cloned its VH and VL genes and constructed the single-chain Fv (scFv) through a peptide linker. The recombinant scFvA21 was expressed in Escherichia coli and purified by the affinity column. Subsequently it was characterized by EliSA, Western blot, cell immunohistochemistry and FACS. All these assays showed the binding activity to extracellular domain (ECD) of p!85. Based on those properties of scFvA21, we further constructed the scFv-Fc fusion molecule with a homodimer form and the recombinant product was expressed in mammalian cells. In a

关键词： p185 c-erbB-2 scFv scFv-Fc.

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