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The nature of the γ-ray flare associated with blazar 3C 454.3

Research in Astronomy and Astrophysics 2015年第9期15卷 1455-1466页

作者： wen Hu zhong-Hui Fan Ben-zhong Da Department of Astronomy Yunnan University Key Laboratory of Astroparticle Physics Yunnan Province

We have studied the simultaneous spectral energy distributions （SEDs） of the 2009 December flare and those of the quiescent state of blazar 3C 454.3 by con- structing a multi-component model We find that all six SEDs can be explained by a one-zone leptonic model involving synchrotron self-Compton （SSC） plus external Compton emission from an accretion disk （ECD） and that from a broad-line region （ECC）. X-ray emission is dominated by the SSC mechanism, and the γ-ray spectrum is well represented by a combination of ECD and ECC processes. Our results indicate that the energy density of the magnetic field and electrons decrease with distance from the central engine, and the Doppler factor increases with the blob moving outward in the development of the 2009 December flare. The increase in the observed flux density is possibly due to the increase in the Doppler factor of the blob. The relation between the Doppler factor σb and the distance from the central black hole suggests the magnetically driven jets span a sub-pc scale, and the relation between the magnetic field Bt and the dimension of the emission region R＇b is in good agreement with what is required by conservation of magnetic flux. The weak ＂harder-when-brighter＂ behavior of the γ-ray spectrum could be a result of the increase in Doppler factor during the outward motion of the blob. The parameters during the quiescent state obviously deviate from those during the flare state. We propose that the flare was likely caused by the ejection of a new blob. The gamma-ray emissions in different states are associated with the evolution of the blob.

关键词： radiation mechanisms: non-thermal -- methods: numerical -- galaxies:active -- quasars: individual (3C 454.3)

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Anode material NbO for Li-ion battery and its electrochemical properties

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Rare Metals 2018年第2期37卷 118-122页

作者： Jian Li wen-wen Liu Hong-Ming Zhou zhong-zhong Liu Bao-Rong Chen wen-Jiao Sun School of Materials Science and Engineering Central South UniversityChangsha 410083China Hunan Zhengyuan Institute for Energy Storage Materials and Devices Changsha 410083China

The NbO electrode materials were successfully synthesized by high-temperature solid-phase method using Nb powders and Nb2O5 powders as raw materials. The crystalline structure, morphology, and electrochemical properties of the obtained materials were characterized by X-ray diffi＇action （XRD）, scanning electron microscopy （SEM）, dynamic light scattering instrument （DLSA）, half- cell charge-discharge tests, and cyclic voltammetry （CV）. The reaction mechanism of lithium with NbO was inves- tigated by ex-situ XRD studies. The results show that material average Li storage voltage is nearly located at 1.6 V, and the lithium intercalation into NbO remains a single-phase process. For the first discharge, a capacity of 355 mAh·g^-1 is obtained at a current rate of 0.1C, and 293 mAh·g^-1is maintained after 50 cycles, whereas a capacity of 416 mAh·g^-1 is obtained at a current rate of 0.1C alter ball milling. And 380 mAh·g^-1 reversible capacity remains for the ball milling sample.

关键词： Niobium oxide Anode Electrochemicalproperties Lithium-ion batteries

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FREE-PARAMETER PERTURBATION-METHOD SOLUTIONS OF THE NONlinEAR STABILITY OF SHALLOW SPHERICAL SHELLS

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Applied Mathematics and Mechanics(English Edition) 2004年第9期25卷 963-970页

作者： CHENShan-lin LIQi-zhong FacultyofCivilEngineering ChongqingUniversityChongqing400045P.R.China

The free-parameter perturbation method is applied to solve the problems of nonlinear stability of spherical shallow shells under uniform load. As a modified perturbation method, the free-parameter perturbation method enables researchers to obtain all characteristic relations without choosing the certain perturbation parameter. Some examples were discussed to study the variety regulations of deflections and stress of shells in the process of buckling, and the results were compared with those of other researchers.

关键词： Free-parameter perturbation method Nonlinear stability Spherical shallow shell

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Magnetic-field-assisted triboelectric nanogenerator for harvesting multi-directional wave energy

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Nano Research 2024年第8期17卷 7144-7152页

作者： Mengru Ding Jianlong Wang Da Zhao Hengyu Li Xiaojun Cheng Jianming wen zhong lin Wang Tinghai Cheng Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400China School of Nanoscience and Engineering University of Chinese Academy of SciencesBeijing 100049China Guangzhou Institute of Blue Energy Guangzhou 510555China College of Engineering Zhejiang Normal UniversityJinhua 321004China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332-0245USA

Ocean wave energy is a significant and promising source of renewable ***,the energy harvesting is challenging due to the multi-directional nature of *** paper proposes a magnetic-field-assisted triboelectric nanogenerator(MFATENG)for harvesting multi-directional wave *** incorporating a magnetic field,the planar motion of the pendulum is converted into spatial motion,increasing the triggering of multilayered TENG(M-TENG)and enhancing the output energy of the *** results demonstrate that the output energy of the MFA-TENG is increased by 73%by utilizing the magnetic ***,a spring model based on the origami-structured M-TENG is established to analyze the effect of different equivalent stiffnesses on the performance of the M-TENG,aiming to obtain optimal output *** results showcase the impressive output performance of the M-TENG,generating outputs of 250 V,18μA,and 255 ***,the proposed MFA-TENG effectively harvests multi-directional wave energy under water-wave driven *** study significantly enhances the ability of the MFA-TENG to harvest multi-directional wave energy and presents a promising approach for self-powered marine monitoring in the future.

关键词： triboelectric nanogenerator magnetic-field-assisted spring model multi-directional wave energy

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Mechanism of action of linggui Zhugan Decoction in treating non-alcoholic fatty liver disease using untargeted metabolomics approach

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Traditional Medicine Research 2025年第2期10卷 65-76页

作者： Huan Pei Ren-lin Li Xin-Ran Song Qian-Qian Wan Yu-Ming Wang Han-Zhou Li Wei-Quan Xu Jia-Bao Liao Wei-Bo wen Jing Miao Huan-Tian Cui School of Basic Medicine Yunnan University of Chinese MedicineKunming 650599China School Clinical Medical College Yunnan University of Chinese MedicineKunming 650599China First School of Clinical Medicine Yunnan University of Chinese MedicineKunming 650599China School of Integrative Chinese and Western Medicine Tianjin University of Traditional Chinese MedicineTianjin 301617China Department of Pharmacy Tianjin Second People's HospitalTianjin 300192China

Background:Non-alcoholic fatty liver disease(NAFLD)is a liver disorder characterized by the accumulation and degeneration of fat in the liver cells,a condition that may further deteriorate and lead to cirrhosis and liver *** studies showed that metabolic dysfunction can promote NAFLD *** Zhugan Decoction(LGZGD)has therapeutic effects on *** mechanism of LGZGD still remains *** study was to examine the impact of LGZGD on the metabolic processes involved in the development of ***:A mice model of NAFLD was treated with *** therapeutic potential of LGZGD was evaluated by assessing the activity of transaminases,lipids levels of blood,and pathological changes in the liver of the mice model of ***,this study also evaluated the influence of LGZGD on liver inflammation and oxidative ***:The results of untargeted metabolomics analysis showed that LGZGD reduced the disordered lipid metabolism in NAFLD *** improved the oxidative stress and also reduced the levels of pro-inflammatory cytokines in the *** metabolomics analysis of liver samples revealed that LGZGD treatment improved metabolic disorders,including alanine,aspartate,glutamate,glycerophospholipid metabolism,and citrate *** RT-qPCR and Western blot results showed that LGZGD could regulate the expression of key enzymes in the metabolic pathway of the citrate cycle,including ATP-citrate lyase(ACLY),alanine-glyoxylate aminotransferase-2(AGXT2),phosphatidylethanolamine N-methyltransferase(PEMT),and succinate dehydrogenase(SDH).Conclusion:We found that LGZGD can treat NAFLD by reducing inflammatory responses,inhibiting oxidative stress,regulating alanine,aspartate,glutamate,and glycerophospholipid metabolism,and citrate cycle pathways.

关键词： NAFLD LGZGD untargeted metabolomics glycerophospholipid metabolism citrate cycle

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Estimating Restricted Common Structural Changes for Panel Data

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Acta Mathematicae Applicatae Sinica 2019年第4期35卷 893-908页

作者： Li-wen ZHANG zhong-yi ZHU School of Statistics and Management Shanghai University of Finance and Economics Shanghai 200444 China Department of Statistics School of Management Fudan University Shanghai 200433 China

We consider estimating multiple structural changes occurring at unknown common dates in a panel data regression model with restrictions imposed on the coefficients. We establish the consistency and rate of convergence of the structural change estimates and the asymptotic distribution of the parameter *** is shown that the efficiency of the parameter estimators is increased using the restrictions. An efficient dynamic algorithm is proposed to obtain the break date estimates and the parameter estimates. In addition, we propose a testing procedure for the existence of the change points with the restrictions and derive the asymptotic distribution under the null hypothesis of the test statistics. Simulation studies are presented to investigate the performance of the proposed method in finite samples.

关键词： common structural changes panel data consistency

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Lattice results on nucleon/roper properties

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Chinese Physics C 2009年第12期33卷 1238-1243页

作者： Huey-wen lin Jefferson Laboratory 12000 Jefferson Avenue Newport News VA 23606 USA

In this proceeding, I review the attempts to calculate the Nucleon resonance （including Roper as first radially excited state of nucleon and other excited states） using lattice quantum chromodynamics （QCD）. The latest preliminary results from Hadron Spectrum Collaboration （HSC） with mπ≈ 380 MeV are reported. The Sachs electric form factor of the proton and neutron and their transition with the Roper at large Q2 are also updated in this work.

关键词： nucleon excited spectroscopy electric and magnetic form factor transposition form factor

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Sequential maneuvering decisions based on multi-stage influence diagram in air combat

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Journal of Systems Engineering and Electronics 2007年第3期18卷 551-555页

作者： zhong lin Tong Ming'an zhong Wei Zhang Shengyun Dept. of Electronic Information Northwestern Polytechnical Univ. Xi'an 710072 P. R. China School of Electronic Science Jiangxi Univ. of Finance and Economics Nanchang 330013 P. R. China

A multi-stage influence diagram is used to model the pilot＇s sequential decision making in one on one air combat. The model based on the multi-stage influence diagram graphically describes the elements of decision process, and contains a point-mass model for the dynamics of an aircraft and takes into account the decision maker＇s preferences under uncertain conditions. Considering an active opponent, the opponent＇s maneuvers can be modeled stochastically. The solution of multistage influence diagram can be obtained by converting the multistage influence diagram into a two-level optimization problem. The simulation results show the model is effective.

关键词： multi-stage influence diagram air combat maneuvering decision hierarchical optimization.

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p-arrangeable Graphs are Folkman linear

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Acta Mathematicae Applicatae Sinica 2021年第1期37卷 69-74页

作者： Xun CHEN Qi-zhong lin Center for Discrete Mathematics Fuzhou UniversityFuzhou 350108 China

For graphs F and G,let F→(G,G)denote that any red/blue edge coloring of F contains a monochromatic *** Folkman number f(G;t)to be the smallest order of a graph F such that F→(G,G)andω(F)≤*** is shown that f(G;t)≤... 详细信息

关键词： Folkman number Folkman linear Multi-partite regularity lemma

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Nitric oxide and calcium ions in apoptotic esophageal carcinoma cells induced by arsenite

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World Journal of Gastroenterology 2002年第1期8卷 40-43页

作者： zhong-YingShen wen-YingShen 等 DepartmentofPathology DepartmentofChemistryMedicalCollegeofShantouNniversity Shantou515031GuangdongChina

AIM: To quantitatively analyze the nitric okide (NO) andCa2+ in apoptosis of esophageal carcinoma cells induced byarsenic trioxide (As2O3).METHODS: The cell line SHEEC1, a malignant esophagealepithelial call induced by HPV in synergy with TPA in ourlaboratory, was cultured in a serum-free medium and treatedwith As2O3. Before and after administration of As2O3, NOproduction in cultured medium was detected quantitativelyusing the Griess Colorimetric method. Intracellular Ca2+ waslabeled using the fluorescent dye Fluo3-AM and detectedunder confocal laser scanning microscope (CLSM), whichwas able to acquire data in real-time enabling Ca2+ dynamicsof individual cells in vitro. The apoptotic cells wareexamined under electron ***: Intracellular concentration of Ca2+ increased from1.00 units to 1.09-1.38 units of fluorescent intensity at As2O3treatment and NO products subsequently released fromAs2O3-treated cells increased from 0.98-1.00 × 10-2 mol@ L-1up to 1.48-1.52 × 10-2 mol@ L-1 and maintained in a highlevel contineously. Finally apoptosis of cells occurred,chromatin being agglutinated, cells shrunk, nuclei becameround and mitochondria ***:Ca2+ and NO increased with cell damage andapoptosis in cells treated by As2O3. The Ca2+ is an initialmessenger to the apoptotic pathway. To investigate Ca2+and NO will be a new direction for studying the apoptoticsignaling messenger of the esophageal carcinoma cellsinduced by As2O3.

关键词：亚砒酸盐食管癌氮氧化物钙离子细胞凋亡

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