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去边缘化的边疆:沈阳空间变迁与东北现代性的多重变奏

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中央民族大学学报（哲学社会科学版） 2024年第5期51卷 37-49页

作者：宋念申清华大学人文与社会科学高等研究所人文学院历史系北京100084

本文聚焦沈阳核心城区自清初到第二次世界大战结束的长时段变迁。但这篇以城市空间演变为主题的文章并不是城市史研究,而是借由不同权力在城市空间中的排列,揭示东北进入现代性的特殊路径。其核心问题意识是:东北边疆是如何展开“现代... 详细信息

本文聚焦沈阳核心城区自清初到第二次世界大战结束的长时段变迁。但这篇以城市空间演变为主题的文章并不是城市史研究,而是借由不同权力在城市空间中的排列,揭示东北进入现代性的特殊路径。其核心问题意识是:东北边疆是如何展开“现代中国”这个统一多民族共同体叙事的。本文提出,沈阳城市格局的变化,生动体现了东北现代性的多重变奏特质。从明代辽东一座普通的卫城,到清代关外第一大都市,再到20世纪东北乃至全国最重要的工业和商业中心,沈阳城的发展容纳了近现代中国形成、转型与重塑的一系列重大主题。其中一个持续性的现象,是一对看似相互背反的动态轨迹:东北作为特殊“边疆”的不断被认定以及这一边疆之“边缘性”的逐渐消失。借助沈阳城市格局的案例研究,本文提出以去边缘化的边疆(de-marginalized frontier)为理解现代东北的一种可能。

关键词：盛京铁路资本主义满铁附属地商埠地统一多民族空间边疆

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区块链安全问题研究综述

计算机工程与科学 2024年第1期46卷 46-62页

作者：沈传年国家计算机网络应急技术处理协调中心上海分中心上海201315

区块链凭借其颠覆性的创新技术,正在不断改变数字金融、数字政务、物联网、智能制造等诸多行业的运行规则和应用场景,是构建未来社会全新信任体系和价值体系不可或缺的关键技术。然而,区块链自身技术的缺陷和应用场景的复杂多变导致的... 详细信息

区块链凭借其颠覆性的创新技术,正在不断改变数字金融、数字政务、物联网、智能制造等诸多行业的运行规则和应用场景,是构建未来社会全新信任体系和价值体系不可或缺的关键技术。然而,区块链自身技术的缺陷和应用场景的复杂多变导致的安全问题日趋严重,已成为制约区块链未来发展的主要瓶颈,区块链的监管之路任重道远。介绍了区块链的背景知识、基本概念和体系架构;从区块链的体系架构出发,分别从数据层、网络层、共识层、激励层、合约层、应用层以及跨链7个方面对区块链的安全问题和防范策略进行分析;在此基础上,从当前政策监管的情况及监管难点、技术监管的标准建立、创新方式及发展趋势对区块链的安全监管进行探讨。

关键词：区块链共识机制智能合约跨链监管

静脉注射丁二磺酸腺苷蛋氨酸对外周浅静脉影响的回顾性研究

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中西医结合护理 2024年第6期10卷 48-52页

作者：沈念覃静霞三峡大学第一临床医学院、湖北省宜昌市中心人民医院介入放射科湖北宜昌443000

目的了解静脉注射注射用丁二磺酸腺苷蛋氨酸(思美泰)对外周浅表静脉的影响,为合理治疗因静脉注射思美泰而产生的静脉炎而提供科学依据。结合静脉炎的产生机制及原因提出相应的处理方法及护理措施,预防及减轻静脉炎的相关症状。方法采用... 详细信息

目的了解静脉注射注射用丁二磺酸腺苷蛋氨酸(思美泰)对外周浅表静脉的影响,为合理治疗因静脉注射思美泰而产生的静脉炎而提供科学依据。结合静脉炎的产生机制及原因提出相应的处理方法及护理措施,预防及减轻静脉炎的相关症状。方法采用回顾性研究方法,抽取2023年1月1日—2023年12月31日就诊于宜昌市中心人民医院介入放射科的163名患者作为研究对象,其中61名患者采用留置针依照药品说明书静脉输注思美泰作为试验组,102名患者采用留置针静脉输注等渗性液体作为对照组。利用思美泰的药理特性、产生静脉炎的原因及机制、静脉炎的分型和分级等专业知识进行调查研究,主要观察疼痛、皮肤红肿范围、静脉呈条索状无弹性的长度及静脉炎级别等指标。结果在严格按照说明书的配置方法及输液速度进行操作采用留置针静脉输注思美泰时外周浅表静脉可发生静脉炎。发生的静脉炎主要见于红肿型和硬结型(χ^(2)=8.69,P<0.05),其中静脉炎可见于1级、2级、3级其中以3级多见(χ^(2)=116.22,P<0.01),其产生的疼痛以2分和3分为主(χ^(2)=85.12,P<0.01)。结论静脉注射思美泰可导致外周浅表静脉发生静脉炎。

关键词：注射用丁二磺酸腺苷蛋氨酸静脉炎药品不良反应护理

■Ω and ■^(*)Ω Dibaryons in SC7(3)Chiral Quark Model

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Chinese Physics Letters 2000年第3期17卷 182-184页

作者： LI Qiang-Bing shen Peng-nian Institute of High Energy Physics Chinese Academy of ScienceBeijing 100039 Chinese Center of Advanced Science and Technology(World Laboratory) Beijing 100080 Institute of Theoretical Physics Chinese Acedemy of SciencesBeijing 100080 Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion AcceleratorLanzhou 730000

The binding energy of the six quark system with strangeness s=-5 is investigated by the SU(3)chiral constituent quark *** single ■^(*)Ω channel calculation with spin S=Q and the coupled ■Ω-■^(*)Ω channel calculation with spin S=1 are *** is shown that in the spin S=0 case,the binding energy of ■^(*)Ω is ranged from 80.0 to 92.4MeV,while in the S=1 case,the additional ■^(*)Ω channel increases the binding energy of ■Ω to a range of 26.2-32.9 MgV.

关键词： model quark S=1

Dynamical Running Mass of Quark in the Dyson-Schwinger Equation Approach

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Communications in Theoretical Physics 2002年第5期38卷 571-576页

作者： MA Wei-Xing shen Peng-nian ZHOU Li-Juan Institute of High Energy Physics the Chinese Academy of Sciences Beijing 100039 China Institute of Theoretical Physics the Chinese Academy of Sciences Beijing 100080 China Department of Information and Computing Science Guangxi University of Technology Liuzhou 545006 China Institute of High Energy Physics the Chinese Academy of Sciences Beijing 100039 China Institute of Theoretical Physics the Chinese Academy of Sciences Beijing 100080 China Department of Information and Computing Science Guangxi University of Technology Liuzhou 545006 China

Based on the Dyson-Schwinger equations of QCD in the "rainbow" approximation, the fully dressed quarkpropagator Sf(p) is investigated, and then an algebraic parametrization form of the propagator is obtained as a solutionof the equations. The dressed quark amplitudes Af and Bf built up the fully dressed quark propagator and the dynamicalrunning masses Mf defined by Af and Bf for light quarks u, d and s are calculated, respectively. Using the predictedrunning masses Mf, quark condensates = -(0.255 GeV)a for u, d quarks, and = 0.8<0|q(0)q(0)]0)for s quark, and experimental pion decay constant fπ = 0.093 GeV, the masses of Goldstone bosons K, π, and η are alsoevaluated. The numerical results show that the masses of quarks are dependent on their momentum p2. The fully dressedquark amplitudes Af and Bf have correct behaviors which can be used for many purposes in our future researches onnonperturbative QCD.

关键词： Dyson-Schwinger equations, quark propagator, quark mass, the masses of Goldstone bosons

Leptonic Decay of J/ψ Y

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Chinese Physics Letters 1998年第12期15卷 871-873页

作者： LIU Bo shen Peng-nian JIANG Huan-qing Institute of High Energy Physics Chinese Academy of SciencesBeijing 100039

A more realistic non-relativistic quark-quark potential in the thermal and dense medium is proposed and used to study the laptonic decay of J/ψ.The laptonic decay property of J/ψin the hot and dense matter depends on the form of the binding *** decay width in the potential case is much sensitive to the temperature than that in the Karsch’s potential case,especially in the lower temperature *** both cases,the decay widths decreased with the increasing temperature and *** resultant critical temperature of 200 MeV is consistent with the lattice quantum chromodynamics finding.

关键词： potential. density. decay

Phase Structure in a Quark Mass Density-and-Temperature-Dependent Model

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Communications in Theoretical Physics 2007年第1期47卷 78-84页

作者： WEN Xin-Jian PENG Guang-Xiong shen Peng-nian Institute of High Energy Physics the Chinese Academy of Sciences Beijing 100049 China Graduate University of the Chinese Academy of Sciences Beijing 100049 China

The phase diagram of bulk quark matter in equilibrium with a finite hadronic gas is studied. Different from previous investigations, we treat the quark phase with the quark mass density-and-temperature-dependent model to take the strong quark interaction into account, while the hadron phase is treated by hard core repulsion factor. It is found that the phase diagram in this model is, in several aspects, different from those in the conventional MIT bag model, especially at high temperature. The new phase diagram also has strong effects on the mass-radius relation of compact hybrid stars.

关键词： phase diagram quark matter hadron matter

Understanding the structure of d~*(2380) in chiral quark model

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Science China(Physics,Mechanics & Astronomy) 2016年第2期59卷 40-48页

作者： Fei Huang Peng nian shen Yu Bing Dong Zong Ye Zhang School of Physical Sciences University of Chinese Academy of Sciences Institute of High Energy Physics Chinese Academy of Sciences Theoretical Physics Center for Science Facilities Chinese Academy of Sciences College of Physics and Technology Guangxi Normal University

The structure and decay properties of d＊ have been detailedly investigated in both the chiral SU（3） quark model and the extended chiral SU（3） quark model that describe the energies of baryon ground states and the nucleon-nucleon （NN） scattering data satisfactorily. By performing a dynamical coupled-channels study of the system of △△ and hidden-color channel （CC） with quantum numbers l（JP） = 0（3^＋） in the framework of the resonating group method （RGM）, we find that the d＊ has a mass of about 2.38-2.42 GeV and a root-mean-square radius （RMS） of about 0.76-0.88 fm. The channel wave function is extracted by a projection of the RGM wave function onto the physical basis, and the fraction of CC component in the d＊ is found to be about 66%-68%, which indicates that the d＊ is a hexaquark-dominated exotic state. Based on this scenario the partial decay widths of d＊ → dπ^0π^0 and d＊ → dn^＋n^- are further explicitly evaluated and the total width is then obtained by use of the branching ratios extracted from the measured cross sections of other possible decay channels. Both the mass and the decay width of d＊ calculated in this work are compatible with the data （M ≈ 2380 MeV, F ≈ 70 MeV） reported by WASA-at-COSY Collaboration.

关键词： hexaquark state d*(2380) quark model hidden-color channel

Neurovascular unit in diabetic retinopathy:pathophysiological roles and potential therapeutical targets

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Eye and Vision 2021年第3期8卷 135-153页

作者： shen nian Amy C.Y.Lo Yajing Mi Kai Ren Di Yang Department of Pathology Xi’an Medical UniversityXi’anShaanxi ProvinceChina Department of Ophthalmology LKS Faculty of MedicineThe University of Hong KongHong KongHong Kong Institute of Basic Medicine Science Xi’an Medical UniversityXi’anShaanxi ProvinceChina Department of Biochemistry and Molecular Biology Xi’an Medical UniversityXi’anShaanxi ProvinceChina Department of Ophthalmology First Affiliated Hospital of Kunming Medical UniversityKunming Medical UniversityKunmingYunnan ProvinceChina

Diabetic retinopathy(DR),one of the common complications of diabetes,is the leading cause of visual loss in working-age individuals in many industrialized *** has been traditionally regarded as a purely microvascular disease in the ***,an increasing number of studies have shown that DR is a complex neurovascular disorder that affects not only vascular structure but also neural tissue of the *** of neural retina could precede microvascular abnormalities in the DR,leading to microvascular ***,disruption of interactions among neurons,vascular cells,glia and local immune cells,which collectively form the neurovascular unit,is considered to be associated with the progression of DR early on in the ***,it makes sense to develop new therapeutic strategies to prevent or reverse retinal neurodegeneration,neuroinflammation and impaired cell-cell interactions of the neurovascular unit in early stage ***,we present current perspectives on the pathophysiology of DR as a neurovascular disease,especially at the early *** novel treatments for preventing or reversing neurovascular injuries in DR are discussed as well.

关键词： Diabetic retinopathy Neurovascular unit Neurodegeneration Gliosis Inflammation treatment