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The Existence of Positive Solution for Singular Boundary Value Problems of First Order Differential Equation on Unbounded Domains

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Acta Mathematicae Applicatae Sinica 2009年第1期25卷 95-104页

作者： Xing-qiu Zhang jing-xian sun Department of Mathematics Liaocheng University Liaocheng Shandong 252059 China Department of Mathematics Xuzhou Normal University Xuzhou Jiangsu 221116 China

By constructing a special cone and using cone compression and expansion fixed point theorem, this paper presents some existence results of positive solutions of singular boundary value problem on unbounded domains for a class of first order differential equation. As applications of the main results, two examples are given at the end of this paper.

关键词： Singular equation unbounded domain positive solution

Prompt photon production in proton–nucleus collisions at LHC:a comparison among color dipole models

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Communications in Theoretical Physics 2023年第12期75卷 75-83页

作者： Hong-Min Wang Yan-Zhao Wang Yong-Han Xu xian-jing sun Physics Department Army Academy of Armored ForcesPLABeijing 100072China Department of Mathematics and Physics Shijiazhuang Tiedao UniversityShijiazhuang 050043China Hebei Key Laboratory of Physics and Energy Technology North China Electric Power UniversityBaoding 071000China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China

The nuclear modification factor for prompt photon production in proton-nucleus collisions is investigated within color dipole *** means of the Glauber-Gribov approach,the nuclear effects are studied in various rapidity bins with the evolution equation-based saturation models and the phenomenological dipole *** theoretical results are compared with the experimental data provided by PHENIX,ATLAS and CMS *** forward rapidity and midrapidity,a reasonable agreement with the experimental data is shown for the theoretical results with the modified Kharzeev,Levin and Nardi model,and the Kowalski and Teaney ***,we analyze the influence of the initial state energy loss effect on the nuclear modification factor and find that it is obvious only at backward rapidity together with small ***,the theoretical results are also compared with those of JETPHOX Monte Carlo program and the predictive results for the LHCb at very forward rapidities are presented.

关键词： color dipole formalism Glauber-Gribov approach small-r limit

J/ψ production in p+p and p+Pb collisions at ultrarelativistic energies

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Nuclear Science and Techniques 2018年第8期29卷 179-185页

作者： Hong-Min Wang Zhao-Yu Hou Xiu-Ting Wang xian-jing sun Physics Department Academy of Army Armored Forces of PLA Physics Graduate School Shijiazhuang Railway Institute Institute of High Energy Physics Chinese Academy of Sciences

The production of J/ψ mesons in p+p and p+Pb collisions is studied in the framework of color-glass condensate together with a simple color evaporation *** the nuclear effects with the Glauber–Gribov approach,we calculate the cross section and the nuclear modification factor of forward J/ψ production in p+Pb collisions at s^(1/2) 5:02 ***,the backward J/ψ production in p+Pb collisions at s^(1/2) 8:16 Te V is also *** our calculation,the phenomenology KLRAd S/CFT model and the rc BK approach,which are valid at a small x,are used to calculate the three-point *** is shown that the theoretical results fit well with the experimental data from ALICE and LHCb.

关键词：碰撞生产 Glauber 精力 J/ψ 修正因素冷凝物现象学

System design and measurements of flux concentrator and its solid-state modulator for CEPC positron source

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Nuclear Science and Techniques 2021年第7期32卷 108-117页

作者： jing-Dong Liu Xiao-Ping Li Cai Meng Yun-Long Chi Guo-Xi Pei Da-Yong He jing-Yi Li xian-jing sun jing-Ru Zhang Lei Shang Jian-Bin Zhu National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China Key Laboratory of Particle Acceleration Physics and Technology Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

Positron sources are one of the most important components of the injector of a circular electron positron collector(CEPC).The CEPC is designed as an e^(+)e^(−)collider for a Higgs *** accelerator system is composed of 100-km-long storage rings and an *** design goal of the positron source is to obtain positron beams with a bunch charge of 3 *** flux concentrator(FC)is one of the cores of the positron *** paper reports the design,development,and measurements of an FC prototype *** prototype includes an FC and an all-solid-state high-current pulse *** tests show that the peak current on the FC can reach 15.5 kA,and the peak magnetic field can reach 6.2 *** test results are consistent with the theoretical *** FC system fulfills the requirements of the CEPC positron source as well as provides a reference for the development of similar devices both domestically and abroad.

关键词： CEPC positron source Flux concentrator Solid-state modulator High current Peak magnetic field

Design, assembly, and pre-commissioning of cryostat for 3W1 superconducting wiggler magnet

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Nuclear Science and Techniques 2020年第11期31卷 78-92页

作者： Miao-Fu Xu xiang-Zhen Zhang Rui Ye Fu-San Chen Xiao-Chen Yang Tong-xian Zhao Shao-Peng Li xian-jing sun Liang-Rui sun Chang-Cheng Ma Rui Ge Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Key Laboratory of Particle Acceleration Physics and Technology Chinese Academy of SciencesBeijing 100049China Center for Superconducting RF and Cryogenics Institute of High Energy PhysicsBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China

One of the most important devices for the High Energy Photon Source Test Facility project,the 2.6 T 32-pole 3W1 superconducting wiggler,was designed by the Institute of High Energy Physics(IHEP);its magnetic gap is 68 mm,and its storage energy is 286 *** will be installed at the storage ring of the Beijing Electron Positron Collider Upgrade Project at the IHEP to replace the old permanent *** primary purpose of the cryostat is to create a safe and reliable system and realize long-term operation with zero liquid helium *** maintain liquid helium temperature,four identical two-stage cryocoolers are placed symmetrically at the wiggler *** cryostat has only one 60 K thermal shield,which is used to reduce the heat load to the liquid helium *** cryostat has several novel features,including a suspension system with little heat leakage that is self-centered during cooling of the cryostat,a special copper liner and high-efficiency condensers,three pairs of binary current leads,and three-level safety *** cryogenic system has been cooled three times,and the residual cooling capacity is approximately 0.41 W at 4.2 K without current.

关键词： Cryostat Cryocooler Superconducting wiggler Superconducting insertion device

miR-124/VAMP3 is a novel therapeutic target for mitigation of surgical trauma-induced microglial activation

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Signal Transduction and Targeted Therapy 2019年第1期4卷 434-444页

作者： Yan Chen jing-xian sun Wan-kun Chen Gen-cheng Wu Yan-qing Wang Ke-ying Zhu Jun Wang Department of Integrative Medicine and Neurobiology State Key Laboratory of Medical NeurobiologySchool of Basic Medical ScienceFudan University200032 ShanghaiChina Institutes of Brain Science Collaborative Innovation Center for Brain ScienceFudan University200032 ShanghaiChina Institute of Acupuncture and Moxibustion Fudan Institutes of Integrative MedicineFudan University200032 ShanghaiChina Department of Anesthesiology Fudan University Shanghai Cancer Center200032 ShanghaiChina Department of Oncology Shanghai Medical CollegeFudan University200032 ShanghaiChina Department of Clinical Neuroscience Center for Molecular MedicineKarolinska Institutet17176 StockholmSweden

Activation of microglia and the subsequently elevated inflammatory cytokine release in the brain during surgery predispose individuals to cognitive dysfunction,also known as postoperative cognitive dysfunction(POCD).miR-124 is one of the most abundant microRNAs in the brain that regulates microglial *** the role of miR-124 in microglial activation in the context of surgery may therefore promote understanding of as well as therapeutic development for post-surgical disorders involving microglial *** downstream targets of miR-124 were investigated using bioinformatic screening and dual-luciferase reporter assay validation,and vesicle-associated membrane protein 3(VAMP3)was identified as a potential *** kinetics of miR-124/VAMP3 expression was first examined in vitro in microglial cells(primary microglia and BV2 microglial cells)following lipopolysaccharide(LPS)*** induced a time-dependent decrease of miR-124 and upregulated the expression of *** miR-124/VAMP3 expression by using miR-124 mimics or VAMP3-specific siRNA in LPS-stimulated BV2 microglial cells inhibited BV2 microglial activation-associated inflammatory cytokine *** further examine the role of miR-124/VAMP3 in a surgical setting,we employed a rat surgical trauma *** microglial activation and altered miR-124/VAMP3 expression were observed following surgical *** also altered miR-124/VAMP3 expression in the rat surgical trauma model by administration of exogenous miR-124 and by using electroacupuncture,which is a clinically applicable treatment that modulates microglial function and minimizes postoperative *** determined that electroacupuncture treatment specifically increases the expression of miR-124 in the hypothalamus and *** miR-124 expression with a concomitant decrease in VAMP3 expression resulted in decreased inflammatory cytokine release related to microglial activation *** s

关键词： miR surgical therapeutic

Effect of local wound infiltration with ropivacaine on postoperative pain relief and stress response reduction after open hepatectomy

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World Journal of Gastroenterology 2017年第36期23卷 6733-6740页

作者： jing-xian sun Ke-Yun Bai Yan-Feng Liu Gang Du Zhi-Hao Fu Hao Zhang Jin-Huan Yang Ben Wang Xiu-Yu Wang Bin Jin Department of Anorectal Surgery Affiliated Hospital of Shandong University of Traditional Chinese MedicineJinan 250011 Shandong Province China Department of Hepatobiliary Surgery Qilu Hospital of Shandong UniversityJinan 250012 Shandong Province China Department of Anesthesiology Qilu Hospital of Shandong UniversityJinan 250012 Shandong Province China

AIM To prospectively evaluate the effect of local wound infiltration with ropivacaine on postoperative pain relief and stress response reduction after open *** A total of 56 patients undergoing open hepatectomy were randomly divided into two groups:a ropivacaine group(wound infiltration with ropivacaine solution)and a control group(infiltration with isotonic saline solution).A visual analog scale(VAS)at rest and on movement was used to measure postoperative pain for the first 48 h after *** arterial pressure(MAP),heart rate(HR),time to bowel recovery,length of hospitalization after surgery,cumulative sufentanil consumption,and incidence of nausea and vomiting were compared between the two *** stress hormones(epinephrine,norepinephrine,and cortisol)were detected using enzyme-linked immunosorbent assay,and the results were compared. RESULTS VAS scores both at rest and on movement at 24 h and48 h were similar between the two *** lower VAS scores were detected at 0,6,and 12 h in the ropivacaine group compared with the control group(P<0.05 for all).MAP was significantly lower at 6,12,and 24 h(P<0.05 for all);HR was significantly lower at 0,6,12,and 24 h(P<0.05 for all);time to bowel recovery and length of hospitalization after surgery(P<0.05 for both)were significantly shortened;and cumulative sufentanil consumption was significantly lower at 6,12,24,and 36 h(P<0.05 for all)in the ropivacaine group than in the control group,although the incidence of nausea and vomiting showed no significant difference between the two *** levels of epinephrine,norepinephrine,and cortisol were significantly lower in the ropivacaine group than in the control group at 24 and 48 h(P<0.01 for all). CONCLUSION Local wound infiltration with ropivacaine after open hepatectomy can improve postoperative pain relief,reduce surgical stress response,and accelerate postoperative recovery.

关键词： Local wound infiltration Ropivacaine Open hepatectomy Postoperative pain Surgical stress

Superconducting multipole wiggler with large magnetic gap for HEPS-TF

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Nuclear Science and Techniques 2022年第2期33卷 21-29页

作者： xian-jing sun Fu-San Chen xiang-Chen Yang Wan Chen Xiao-Juan Bian Min-xian Li Rui Ge Miao-Fu Xu Yao Gao Jin-Can Wang Hui-Hua Lu Jian-She Cao Zhi-Qiang Li Zhuo Zhang Rui Ye xiang-Zhen Zhang Shuai Li Bao-Gui Yin Mei Yang Ling-Ling Gong Da-Heng Ji Lin Bian Ran Liang Ya-Jun sun Hong Shi Institute of High Energy Physics Chinese Academy of SciencesBeijing 10049China Key Laboratory of Particle Acceleration Physics and Technology Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China China Spallation Neutron Source Institute of High Energy PhysicsChinese Academy of SciencesDongguan 523803China

A 16-pole superconducting multipole wiggler with a large gap of 68 mm was designed and fabricated to serve as a multipole wiggler for *** wiggler consists of 16 pairs of NbTi superconducting coils with a period length of 170 mm,and its maximum peak field is 2.6 *** magnet design,magnet poles were ***,the Lorentz force on the coils and electromagnetic force between the upper and lower halves were computed and analyzed along with the stored energy and inductance at different *** enhance the critical current of the magnet coil,all the pole coils selected for the magnet exhibited excellent performance,and appropriate prestress derived from the coil force analysis was applied to the pole coils during magnet *** entire magnet structure was immersed in 4.2-K liquid helium in the cryostat cooled solely by four two-stage cryocoolers,and the performance test of the superconducting wiggler was appropriately *** on the measured results,the first and second field integrals on the axis of the superconducting wiggler were significantly improved at different field levels after the compensation of the corrector ***,the wiggler was successfully installed in the storage ring of BEPCII operation with beams.

关键词： Superconducting multipole wiggler Force analysis Quench protection Magnetic field measurement HEPS-TF Cryostat

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非正非线性算子方程正解的存在性及其应用

数学学报（中文版） 2012年第1期55卷 55-64页

作者：孙经先徐西安徐州师范大学数学科学学院徐州221116

首先使用全局分歧理论得到了含参数非线性算子方程解集无界连通分支存在的结果,然后根据算子的正连通性得到了一类非正非线性算子方程正解的存在结果.使用本文的主要结果在无需假设非线性项为正的条件下可以得到某些微分边值问题正解的... 详细信息

首先使用全局分歧理论得到了含参数非线性算子方程解集无界连通分支存在的结果,然后根据算子的正连通性得到了一类非正非线性算子方程正解的存在结果.使用本文的主要结果在无需假设非线性项为正的条件下可以得到某些微分边值问题正解的存在结果.

关键词：连通分支正解格