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Calculating the Climatology and Anomalies of Surface Cloud Radiative Effect Using Cloud Property Histograms and Cloud Radiative Kernels

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Advances in Atmospheric Sciences 2022年第12期39卷 2124-2136页

作者： Chen zhou Yincheng LIU quan WANG School of Atmospheric Sciences Nanjing UniversityNanjing 210093China

Cloud radiative kernels(CRK)built with radiative transfer models have been widely used to analyze the cloud radiative effect on top of atmosphere(TOA)fluxes,and it is expected that the CRKs would also be useful in the analyses of surface radiative fluxes,which determines the regional surface temperature change and *** this study,CRKs at the surface and TOA were built using the Rapid Radiative Transfer Model(RRTM).Longwave cloud radiative effect(CRE)at the surface is primarily driven by cloud base properties,while TOA CRE is primarily decided by cloud top *** this reason,the standard version of surface CRK is a function of latitude,longitude,month,cloud optical thickness(τ)and cloud base pressure(CBP),and the TOA CRK is a function of latitude,longitude,month,τand cloud top pressure(CTP).Considering that the cloud property histograms provided by climate models are functions of CTP instead of CBP at present,the surface CRKs on CBP-τhistograms were converted to CTP-τfields using the statistical relationship between CTP,CBP andτobtained from collocated CloudSat and MODIS *** both climate model outputs and satellites observations,the climatology of surface CRE and cloud-induced surface radiative anomalies calculated with the surface CRKs and cloud property histograms are well correlated with those calculated from surface radiative *** cloud-induced surface radiative anomalies reproduced by surface CRKs and MODIS cloud property histograms are not affected by spurious trends that appear in Clouds and the Earth's Radiant Energy System(CERES)surface irradiances products.

关键词： cloud radiative kernel surface radiative flux cloud feedback cloud properties cloud top pressure cloud base pressure

Synthesis and Crystal Structure of a Dinuclear Cu(Ⅱ) Complex Based on a Carboxyl-substituted 1H-1,2,3-Triazole and Its DNA Cleavage Activity

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Chinese Journal of Structural Chemistry 2015年第6期34卷 917-924页

作者： LIU Wen-Qian zhou Shi-Lei FAN Ming-Zhu PAN Zhi-quan CHEN Yun-feng School of Chemistry and Environmental Engineering Wuhan Institute of Technology

The novel dinuclear copper complex [Cu2（H20）2（DMF）2（L）2] （1, H2L = 5-phenyl- 2H-1,2,3-triazole-4-carboxylic acid, DMF = N,N-dimethyl-formamide） has been synthesized and characterized by X-ray single-crystal diffraction. The compound crystallizes in triclinic system, space group P1 with a = 9.591, b = 10.508, c = 15.515A,β = 75.11°, V= 1446.2 A3, Z= 2, Mr = 683.62, Dc = 1.570 g/cm3, μ = 1.531 mm^-1, F（000） = 700, the final R = 0.0404 and wR = 0.1130 for 5327 observed reflections with I 〉 2σ（I）. In each unit of the complex, two Cu2＋ ions coordinated with two triazole ligands to form a dimeric [5,6,5] tricyclic structure. The central Cu atom is five-coordinated, and each copper atom shows a square pyramidal geometry. The crystal structure is stabilized by the inversion-related O-H…O hydrogen bond and C-H…O hydrogen bonding interactions to form a layer structure. Fluorescent spectra show an obvious quenching of fluorescence compared with free 1,2,3-triazole ligand. The results of agarose gel electrophoresis indicate that this complex can cleave the plasmid supercoiled DNA within shorter time in the 50-folds excess of ascorbate under physiological conditions, providing a new example in the research for artificial metal nucleic acid enzyme.

关键词： 1,2,3-triazole copper complex crystal structure fluorescent property DNA cleavage activity

A review of addressing class noise problems of remote sensing classification

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Journal of Systems Engineering and Electronics 2023年第1期34卷 36-46页

作者： feng Wei LONG Yijun WANG Shuo quan Yinghui School of Electronic Engineering Xidian UniversityXi’an 710071China Xi’an Key Laboratory of Advanced Remote Sensing Xi’an 710071China Key Laboratory of Collaborative Intelligence Systems Ministry of EducationXidian UniversityXi’an 710071China

The development of image classification is one of the most important research topics in remote sensing. The prediction accuracy depends not only on the appropriate choice of the machine learning method but also on the quality of the training datasets. However, real-world data is not perfect and often suffers from noise. This paper gives an overview of noise filtering methods. Firstly, the types of noise and the consequences of class noise on machine learning are presented. Secondly, class noise handling methods at both the data level and the algorithm level are introduced. Then ensemble-based class noise handling methods including class noise removal, correction, and noise robust ensemble learners are presented. Finally, a summary of existing data-cleaning techniques is given.

关键词： class noise label noise mislabeled classification ensemble learning remote sensing

Ca^(2+) cytochemical changes of hepatotoxicity caused by halothane and sevoflurane in enzyme-induced hypoxic rats

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World Journal of Gastroenterology 2005年第32期11卷 5025-5028页

作者： Wei-feng Yu Li-Qun Yang Mai-Tao zhou Zhi-Qiang Liu quan Li Department of Anesthesiology Eastern Hepatobiliary Surgery Hospital the Second Military Medical University Shanghai 200438 China

AIM： To investigat the relation between hepatotoxicity of halothane and sevoflurane and altered hepatic calcium homeostasis in enzyme-induced hypoxic rats. METHODS： Forty-eight rats were pretreated with phenobarbital and randomly divided into six groups （eight in each group） and exposed to O2/N2/1.2 MAC anesthetics for 1 h： normal control （NC）, 21% O2/79% N2; hypoxic control （HC）, 14% O2/86% N2; normal sevoflurane （NS）, 21% O2/ N2/1.2MAC sevoflurane; hypoxic sevoflurane （HS）, 14% O2/N2/1.2MAC sevoflurane; normal halothane （NH）21%O2/79%N2/1.2MAC halothane; hypoxic halothane （HH）, 14%O2/N2/1.2MAC halothane. Liver specimens and blood were taken 24 h after exposure to calcium and determined by EDX microanalysis. RESULTS： The liver of all rats given halothane （14% O2） had extensive centrilobular necrosis and denaturation. Morphologic damage was accompanied with an increase in serum glutarnic pyruvic transminase. In groups NH and HH, more calcium was precipitated in cytoplasm and mitochondria. CONCLUSION： These results suggest that halothane increases cytosolic Ca^2＋ concentration in hepatocytes. Elevation in Ca^2＋ concentration is implicated in the mechanism of halothane-induced hepatotoxicity. sevoflurane is less effective in affecting hepatic calcium homeostasis than halothane.

关键词： Ca^2+ cytochemistry Hepatotoxicity Calcium homeostasis Halothane Sevoflurane

The nitrate-responsive transcription factor Md NLP7 regulates callus formation by modulating auxin response

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Journal of Integrative Agriculture 2023年第10期22卷 3022-3033页

作者： LI Tong feng Zi-quan ZHANG Ting-ting YOU Chun-xiang zhou Chao WANG Xiao-fei Apple Technology Innovation Center of Shandong Province/Shandong Collaborative Innovation Center of Fruit&Vegetable Quality and Efficient Production/National Key Laboratory of Wheat Improvement/College of Horticulture Science and Engineering Shandong Agricultural UniversityTai’an 271018P.R.China National Key Laboratory of Wheat Improvement/College of Life Sciences Shandong Agricultural UniversityTai’an 271018P.R.China

Under appropriate culture conditions,plant cells can regenerate new organs or even whole *** novo organ regeneration is an excellent biological system,which usually requires additional growth regulators,including auxin and *** is an essential nutrient element for plant vegetative and reproductive *** has been reported that nitrate is involved in auxin biosynthesis and transport throughout the growth and development of *** this study,we demonstrated that the ectopic expression of the MdNLP7 transcription factor in Arabidopsis could regulate the regeneration of root ***7 mainly participated in the regulation of callus formation,starting with pericycle cell division,and mainly affected auxin distribution and accumulation in the regulation ***,MdNLP7 upregulated the expression of genes related to auxin biosynthesis and transport in the callus formation *** results demonstrated that MdNLP7 may play a role in the nitrate-modulated regeneration of root ***,the results revealed that nitrate–auxin crosstalk is required for de novo callus initiation and clarified the mechanisms of organogenesis.

关键词： MdNLP7 callus initiation auxin nitrate pericycle shoot regeneration

Human endothelial senescence can be induced by TNF-α

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Chinese Science Bulletin 2002年第2期47卷 118-122页

作者： Jianjun zhou Yunfei Gao Hongfang Wang quan Chen Caihong Wu Meifu feng The National Key Laboratory of Biomembrane and Membrane Biotechnology College of Life Sciences Peking University Beijing China The National Key Laboratory of Biomembrane and Membrane Biotechnology Institute of Zoology Chinese Academy of Sciences Beijing China Department of Cell Biology and Genetics College of Life Sciences Peking University Beijing China

TNF-α is one of the most important proin-flammatory cytokines in mediating multiple physio-patho-logical functions during immunological responses. Vascular endothelial cells, when stimulated by TNF-α, can increase the expression of multiple cytokines and cellular adhesion molecules and, in turn, actively promote the inflammatory responses by recruiting and activating of leukocytes to the inflammatory site. In addition to endothelial death induced by TNF-α, we found for the first time that TNF-α can also induce the human endothelial cells senescence. The induced senescent endothelial cells will display SA-B-Gal staining and they were arrested in G0-G1 phase. We found that △(?)m would always be up-regulated in response to TNF-α stimula-tion at early time but when the cells become senescent, △(?)m shows a tendency to decrease. It may reflect the sthenic func-tion of mitochondria at early time in response to TNF-α stimulation and decay when the endothelial cells were in-duced senescent. ROS

关键词： TNF-α endothelial cells inflammation senescence.

Infinite Horizon Forward-Backward Doubly Stochastic Differential Equations and Related SPDEs

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Acta Mathematicae Applicatae Sinica 2021年第2期37卷 319-336页

作者： Qing-feng ZHU Liang-quan ZHANG Yu-feng SHI School of Mathematics and quantitative Economics Shandong University of Finance and EconomicsandShandong Key Laboratory of Blockchain FinanceJinan 250014China Institute for Financial Studies and School of Mathematics Shandong UniversityJinanChina School of Science Beijing University of Posts and TelecommunicationsBeijing 100876China

A type of infinite horizon forward-backward doubly stochastic differential equations is *** some monotonicity assumptions,the existence and uniqueness results for measurable solutions are established by means of homotopy method.A probabilistic interpretation for solutions to a class of stochastic partial differential equations combined with algebra equations is given.A significant feature of this result is that the forward component of the FBDSDEs is coupled with the backward variable.

关键词： infinite horizon forward-backward doubly stochastic differential equations homotopy stochastic partial differential equation

Explicit High Order One-Step Methods for Decoupled Forward Backward Stochastic Differential Equations

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Advances in Applied Mathematics and Mechanics 2021年第6期13卷 1293-1317页

作者： quan zhou Yabing Sun School of Mathematics Shandong UniversityJinanShandong 250100China College of Science National University of Defense TechnologyChangshaHunan 410073China

By using the Feynman-Kac formula and combining with Itˆo-Taylor expansion and finite difference approximation,we first develop an explicit third order onestep method for solving decoupled forward backward stochastic differential *** based on the third order one,an explicit fourth order method is further *** numerical tests are also presented to illustrate the stability and high order accuracy of the proposed methods.

关键词： Decoupled forward backward stochastic differential equations Itˆo-Taylor expansion,finite difference approximation explicit one-step method high order convergence

KnowledgeMapping of Hybrid Solar PV andWind Energy Standalone Systems: A Bibliometric Analysis

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Energy Engineering 2024年第7期121卷 1781-1803页

作者： quan zhou Haiyang Li School of Mechanical and Electrical Engineering Central South University of Forestry and TechnologyChangsha410004China

Renewable energy is becoming more attractive as traditional fossil fuels are rapidly depleted and expensive,and their use would release *** systems that use both wind and solar energy are more reliable and efficient than those that utilize only one *** renewable energy systems(HRES)are viable for remote areas operating in standalone *** paper aims to present the state-of-the-art research on off-grid solar-wind hybrid energy systems over the last two *** than 1500 published articles extracted from the Web of Science are analyzed by bibliometric methods and processed by CiteSpace to present the results with figures and *** countries and highly cited authors are identified,and hot topics with hotspot articles are shown in landscape and timeline *** trends and new developments related to techno-economic analysis and microgrids,as well as the application of HOMER software,are predicted based on the analysis of citation ***,the opportunities of hybrid energy systems for sustainable development are discussed,and challenges and possible solutions are *** study of this paper provides researchers with a comprehensive understanding and intuitive representation of standalone solar-wind hybrid energy systems.

关键词： Wind energy solar PV standalone citation bursts emerging trends