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Comparing the performances of WRF QPF and PERSIANN-CCS QPEs in karst flood simulation and forecasting by coupling the Karst-liuxihe model

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Frontiers of Earth Science 2022年第2期16卷 381-400页

作者： ji li Daoxian YUAN Yuchuan SUN jianhong li Chongqing jinfo Mountain Karst Ecosystem National Observation and Research Station School of Geographical SciencesSouthwest UniversityChongqing 400715China Key Laboratory of Karst Dynamics(MNR&Guangxi)Institute of Karst Geology CAGSGuilin 541004China

Long-term rainfall data are crucial for flood simulations and forecasting in karst ***,in karst areas,there is often a lack of suitable precipitation data available to build distributed hydrological models to forecast karst *** precipitation forecasts(QPFs)and estimates(QPEs)could provide rational methods to acquire the available precipitation data for karst ***,coupling a physically based hydrological model with QPFs and QPEs could greatly enhance the performance and extend the lead time of flood forecasting in karst *** study served two main *** purpose was to compare the performance of the Weather Research and Forecasting(WRF)QPFs with that of the Precipitation Estimations through Remotely Sensed Information based on the Artificial Neural Network-Cloud Classification System(PERSIANN-CCS)QPEs in rainfall forecasting in karst river *** other purpose was to test the feasibility and effective application of karst flood simulation and forecasting by coupling the WRF and PERSIANN models with the Karst-liuxihe *** rainfall forecasting results showed that the precipitation distributions of the 2 weather models were very similar to the observed rainfall ***,the precipitation amounts forecasted by WRF QPF were larger than those measured by the rain gauges,while the quantities forecasted by the PERSIANN-CCS QPEs were smaller.A postprocessing algorithm was proposed in this paper to correct the rainfall estimates produced by the two weather *** flood simulations achieved based on the postprocessed WRF QPF and PERSIANN-CCS QPEs coupled with the Karst-liuxihe model were much improved over previous *** particular,coupling the postprocessed WRF QPF with the Karst-liuxihe model could greatly extend the lead time of flood forecasting,and a maximum lead time of 96 h is adequate for flood warnings and emergency responses,which is extremely important in flood simulations and forecasting.

关键词： WRF QPF PERSIANN-CCS QPEs the Karst-liuxihe model flood simulation and forecasting karst river basin

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Single-photon quantum router based on asymmetric intercavity couplings

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Communications in Theoretical Physics 2020年第5期72卷 52-57页

作者： ji-Yang li Xin-Lei li Guo-An Yan College of Physics and Engineering Qufu Normal UniversityQufu 273165China

As a special quantum node in a quantum network,the quantum router plays an important role in storing and transferring quantum *** this paper,we propose a quantum router scheme based on asymmetric intercavity couplings and a three-levelΛ-type atomic *** scheme implements the quantum routing capability very *** can perfectly transfer quantum information from one quantum channel to *** with the previous quantum routing scheme,our proposed scheme can achieve the transfer rate of single photons from one quantum channel to another quantum channel reaching 100%,the high transfer rate is located in the almost quadrant regions with negative values of the two variablesλa andλb,and their maximum values Tu^b+Td^b=1 emerge in the center pointλa=λb=-***,it is possibly feasible to efficiently enhance the routing capability of the single photons between two channels by adjusting the inter-resonator couplings,and the asymmetric intercavity coupling provides a new method for achieving high-fidelity quantum routers.

关键词： quantum router asymmetric intercavity quantum information processing

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Nitrogen release and re-adsorption dynamics on crop straw residue during straw decomposition in an Alfisol

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Journal of Integrative Agriculture 2021年第1期20卷 248-259页

作者： li ji-fu ZHONG Fang-fang Engineering Research Center of Ecology and Agricultural Use of Wetland Ministry of Education/College of AgricultureYangtze UniversityJingzhou 434025P.R.China

Returning crop straw to the field not only improves the nitrogen(N) supplying capacity and N retention of soil but also decreases the amount of rural organic waste and prevents air pollution. Therefore, understanding the mechanisms of the N release and re-adsorption dynamics on crop straw residue during straw decomposition in agricultural soil is important, and this understanding can help us strengthen N fertilizer management during the crop growth period. An on-farm incubation experiment was conducted in the jianghan Plain in Central China under flooded conditions using the nylon mesh bag method. Results showed that the decomposition rate of crop straw was much faster at the beginning of the incubation stage, whereas it was steady during the later stage with no observed differences among the three types of crop straw. After 120 d of incubation, the cumulative decomposition proportion of rice straw, wheat straw and rape straw was 72.9, 56.2, and 66.9%, respectively. The proportion of N that released from the three crop straws was 52.0, 54.4 and 54.9%, respectively. The zeta potentials and Brunauer, Emmett and Teller(BET) surface area of the rice, wheat and rape straw residues increased gradually as the decomposition period progressed. The water adsorption capacity of the rice straw was significantly affected during the decomposition period. The saturated water adsorption capacity of rice straw was the highest at 30 d of decomposition(4.17 g g^–1) and then decreased slightly. The saturated water adsorption of wheat and rape straws reached the lowest value at 30 d and then gradually increased and became stable. All the results demonstrated that crop straw and straw residue can re-adsorb NH4^+ ions from the surrounding solution. The re-adsorption was affected by the decomposition period and concentration of exogenous NH4^+ and was independent of the crop species via the combined efforts of physical and chemical adsorption, ion exchange and water retention on residue su

关键词： adsorption decomposition nitrogen(N) Alfisol straw substrate

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Quantized vortices in spinor Bose–Einstein condensates with time–space modulated interactions and stability analysis

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Chinese Physics B 2020年第10期29卷 227-232页

作者： Yu-Qin Yao ji li Department of Applied Mathematics China Agricultural UniversityBeijing 102206China Department of Physics Taiyuan Normal UniversityTaiyuan 030031China

The three-component Gross–Pitaevskii equation with an angular momentum rotational term can be served as a model to study spinor Bose–Einstein condensates (BECs) with time–space modulated interactions. Vortex solutions of the spinor BECs with spatiotemporally modulated interactions are worked out by similarity transformation. Theoretical analysis and numerical simulation of vortex states are demonstrated. Stable vortex states are obtained by adjusting the frequency of the external potential and the spatiotemporally modulated interaction.

关键词： spinor Bose-Einstein condensates spatiotemporal modulation vortex solution dynamical stability

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Skyrmion Excitations in Planar Ferromagnets

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Communications in Theoretical Physics 2009年第1期51卷 157-160页

作者： WANG ji-Biao REN ji-Rong li Ran Institute of Theoretical Physics Lanzhou University Lanzhou 730000 China

By making use of the C-mapping topological current theory and the decomposition of gauge potential theory, we investigate the （2＋1）-dimensional skyrmion excitations in ferromagnets. We also discuss the branch proce... 详细信息

关键词： ferromagnet skyrmion

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Classification of natural products as sources of drugs according to the biopharmaceutics drug disposition classification system(BDDCS)

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Chinese Journal of Natural Medicines 2016年第12期14卷 888-897页

作者： li ji Caroline A.Larregieu Leslie *** Department of Clinical Pharmacy School of Basic Medicine and Clinical Pharmacy China Pharmaceutical University Department of Bioengineering & Therapeutic Science University of California

Natural products(NPs) are compounds that are derived from natural sources such as plants, animals, and microisms. Therapeutics has benefited from numerous drug classes derived from natural product sources. The Biopharmaceutics Drug position Classification System(BDDCS) was proposed to serve as a basis for predicting the importance of transporters and enzymes in determining drug bioavailability and disposition. It categorizes drugs into one of four biopharmaceutical classes according to their water solubility and extent of metabolism. The present paper reviews 109 drugs from natural product sources: 29% belong to class 1(high solubility, extensive metabolism), 22% to class 2(low solubility, extensive metabolism), 40% to class 3(high solubility, poor metabolism), and 9% to class 4(low solubility, poor metabolism). Herein we evaluated the characteristics of NPs in terms of BDDCS class for all 109 drugs as wells as for subsets of NPs drugs derived from plant sources as antibiotics. In the 109 NPs drugs, we piled 32 drugs from plants, 50%(16) of total in class 1, 22%(7) in class 2 and 28%(9) in class 3, none found in class 4; Meantime, the antibiotics were found 5(16%) in class 2, 22(71%) in class 3, and 4(13%) in class 4; no drug was found in class 1. Based on this classification, we anticipate BDDCS to serve as a useful adjunct in evaluating the potential characteristics of new natural products.

关键词： Biopharmaceutics Drug Disposition Classification System(BDDCS) Natural products(NPs) Dose number Solubility and extent of metabolism

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PARAMETERS IDENTIFICATION IN A SALTWATER INTRUSION PROBLEM

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Acta Mathematica Scientia 2020年第5期40卷 1563-1584页

作者： ji li Carole ROSIER College of Mathematics and Statistics Chongqing Technology and Business UniversityChongqing Key Laboratory of Social Economy and Applied StatistiesChongqing 400067China LMPA Laboratoire de Mathematiques Pures et Appliquees Joseph LiouvilleF-62100 CalaisFranceCNRS FR 2037France

This article is devoted to the identification, from observations or field measurements, of the hydraulic conductivity K for the saltwater intrusion problem in confined aquifers. The involved PDE model is a coupled system of nonlinear parabolic-elliptic equations completed by boundary and initial conditions. The main unknowns are the saltwater/freshwater interface depth and the freshwater hydraulic head. The inverse problem is formulated as an optimization problem where the cost function is a least square functional measuring the discrepancy between experimental data and those provided by the *** the exact problem as a constraint for the optimization problem and introducing the Lagrangian associated with the cost function, we prove that the optimality system has at least one solution. Moreover, the first order necessary optimality conditions are established for this optimization problem.

关键词： parameters identification optimization problem strongly coupled system nonlinear parabolic equations seawater intrusion

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A molecular insight into coke formation process of vacuum residue in thermal cracking reaction

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Petroleum Science 2024年第3期21卷 2130-2138页

作者： ji-Guang li Xin Guo Huan-Di Hou Heavy Oil Processing Department Sinopec Research Institute of Petroleum Processing Co.LtdBeijing100083China

Understanding the coking behaviors has been considered to be really essential for developing better vacuum residue processing technologies.A battery of thermal cracking tests of typical vacuum residue at 410℃ with various reaction time were performed to evaluate the coke formation *** total yields of ideal components including naphtha,atmospheric gas oil(AGO)and vacuum gas oil(VGO)of thermal cracking reactions increased from 10.89%to 40.81%,and the conversion ratios increased from8.05%to 43.33%with increasing the reaction time from 10 to 70 *** asphaltene content increased from 12.14%to a maximum of 22.39%and then decreased,and this maximum of asphaltene content occurred at the end of the coking induction *** asphaltenes during the coking induction period,at the end and after coking induction period of those tested thermal cracking reactions were characterized to disclose the structure changing rules for coke formation process,and the coke formation pathways were discussed to reveal the coke formation process at molecular level.

关键词： Vacuum residue Thermal cracking Asphaltene Coking induction period Sulfur Nitrogen

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Effect of adding Lactobacillus plantarum and soluble carbohydrates to swine manure on odorous compounds, chemical composition and indigenous flora

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Journal of Environmental Sciences 2006年第1期18卷 201-206页

作者： HUANG Can li ji KANG Wen-li TANG Xin-yan College of Resources and Environment Sciences China Agriculture University Beijing 100094 China College of Animal Sciences Zhejiang University Hangzhou 310029 China

Manure odor, which results in the increasing complaints and lawsuits, has increased the tension among swine producers and surrounding residents. The effects of Lactobacillus plantarum and different rates of soluble carbohydrates additions to swine manure on odorous compounds, chemical compounds and indigenous flora were evaluated. Additions were calculated on dried manure weight basis. Variables monitored included ammonia （NH3）, hydrogen sulfide （H2S）, odor offensiveness, pH, ammonium nitrogen（NH4^＋-N）, volatile fatty acids （VFAs）, urease and indigenous flora. The results indicated that the combination of L. plantarum and soluble carbohydrates dramatically reduced manure pH. Lower pH resulted in the reduction of NH3 volatilization （34.6%-92.4%, P〈0.01）, the increases of H2S （P〈 0.05） and NH4^＋-N （5.3%-17.5%, P〈0.05）. In addition, L. plantarum and soluble carbohydrates additions significantly reduced odor offensiveness, those VFAs related to malodor indicators（valeric acids, 12.3%-47.7%, P〈 0.05; iso-valeric, 3.5%-23.8%） and the main microorganisms responsible for odor production, with the number of Eubacteria in swine manure reducing by 4.9%, 11.6%, 17.4%, 34.1% and 32.2% respectively.

关键词： Laetobaeillus plontarum soluble carbohydrates swine manure odorous compounds indigenous flora

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Phenotypic Classification of Well-Differentiated Gastric Adenocarcinoma

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Chinese Journal of Cancer Research 2009年第4期21卷 278-289页

作者： Ying Wu Zhong-wu li ji-you li Key Laboratory of Carcinogenesis and Translational Research （Ministry of Education） Department ofPathology Peking University School of Oncology Beijing Cancer Hospital ＆ Institute Beijing 100142China

Objective： To investigate the genotypes of well-differentiated non-cardiac gastric adenocarcinoma and their clinicopathological significance. Methods： Sixty-four cases of well-differentiated non-cardiac gastric adenocarcinoma were included in this study. The expressions of intestinal phenotypic markers including CDX2, MUC2, li-cadherin, CD10, Hepatocyte（Hep） and Villin, and gastric phenotypic markers including MUC5AC and pS2 were detected immunohistochemically. Based on the expressions of phenotypic markers, 64 cases can be divided into four phenotypes. Cases only expressing intestinal phenotypic markers were classified as intestinal phenotype; cases only expressing gastric phenotypic markers as gastric phenotype; cases expressing both intestinal and gastric phenotypic markers as gastrointestinal phenotype; and cases expressing neither intestinal nor gastric phenotypic marker as null phenotype. The association of phenotype and clinic-pathological parameters was analyzed. We also detected the expressions of markers related to the development and progression of cancer, including Rb, P53, c-Met, MIF, TGF-β-RII, β-catenin, CD44v6 and E-cadherin. Results： Of 64 cases, 33（51.6%） were intestinal type, 3（4.7%） were gastric type, 25（39.1%） were gastrointestinal type and 3（4.7%） were null type. Fifty-eight cases were either intestinal or gastrointestinal type, which accounted for 90.6% of all the cases. In addition, there was an association between phenotype and biological behaviors （invasion or metastasis）. The biological behaviors of intestinal and gastrointestinal type were better than gastric type. Compared with intestinal, gastric and gastrointestinal types, the biological behaviors of null type were the most aggressive. The biological behaviors of gastric carcinoma tended to be better as the number of expression of intestinal markers increased. Expression of markers related to the development and progression of cancer was not significantly correlated with phenotypes a

关键词： Gastric carcinoma Phenotype Immunohistochemistry Biological behavior

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