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越南红河水下三角洲表层沉积物中有机物分布及来源分析

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海洋与湖沼 2013年第3期44卷 577-583页

作者：李中乔吴莹李珍宋兵 DANG xuan Phong 华东师范大学河口海岸国家重点实验室上海200062 越南科学技术院地理研究所

采用总有机碳(OC%)、总氮(TN%)、有机碳同位素组成(δ13C)以及木质素方法,对越南红河水下三角洲表层沉积物进行研究,结合粒度数据,分析其有机物分布以及来源。结果表明,红河口表层沉积物的(C/N)mol在2.7—18.7之间;有机碳(OC%)和总氮(T... 详细信息

采用总有机碳(OC%)、总氮(TN%)、有机碳同位素组成(δ13C)以及木质素方法,对越南红河水下三角洲表层沉积物进行研究,结合粒度数据,分析其有机物分布以及来源。结果表明,红河口表层沉积物的(C/N)mol在2.7—18.7之间;有机碳(OC%)和总氮(TN%)在近岸粒径大的站位含量低,粒度小的站位含量高;δ13C(‰)在22.8—25.9之间;Λ8(mg/100mgOC)在0.2—4.9之间。使用简单二端元模型计算后发现陆源有机物在表层沉积物中占的比例在3.7%—89.5%,并且与粒径大小有关,粒径大陆源有机物比例低,粒径小陆源有机物比例高,说明水动力分选是控制陆源有机物分布的主要因素。C/V和S/V分别为0.29±0.13和0.87±0.18,表明该区域的陆源有机物来源于被子植物的草本和木本部分混合。V系列的酸醛比(Ad/Al)v在0.38—2.43之间,平均值为0.70,说明该区域陆源有机物经历了中等程度的降解。

关键词：越南红河表层沉积物有机物木质素

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基于设计演算的形式化用例分析建模框架

软件学报 2008年第10期19卷 2539-2549页

作者：陈鑫李宣东南京大学计算机科学与技术系江苏南京210093 计算机软件新技术国家重点实验室(南京大学) 江苏南京210093

提出一种形式化用例分析建模框架,引入类图、用例顺序图、用例状态图、功能规约函数和系统不变式从多个角度为需求建模.通过定义这些视图的形式化语义,为需求的各个方面定义了准确的形式化描述.利用该框架,可以从方法的交互行为规约和... 详细信息

提出一种形式化用例分析建模框架,引入类图、用例顺序图、用例状态图、功能规约函数和系统不变式从多个角度为需求建模.通过定义这些视图的形式化语义,为需求的各个方面定义了准确的形式化描述.利用该框架,可以从方法的交互行为规约和功能规约合成描述方法全部行为的全规约;也可以定义用例模型的性质,并通过设计演算中的证明来分析验证这些性质.作为应用,研究了检查用例模型一致性的规则.给出一个实例说明建模框架的可行性.

关键词：用例模型语义多视图一致性检验最弱前提条件

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红磷烟幕中红外光谱和红外消光性能研究

红外与毫米波学报 2006年第5期25卷 397-400页

作者：王玄玉潘功配南京理工大学化工学院

在中型烟幕试验柜中测试了红磷烟幕的红外光谱和粒度分布,分析了红磷烟幕在7.4μm^13.8μm波段的红外透过率和消光系数.测试了红磷烟幕对10.6μm激光的质量消光系数.根据M ie理论计算了红磷烟幕粒子对该波段红外的散射、吸收和消光效率... 详细信息

在中型烟幕试验柜中测试了红磷烟幕的红外光谱和粒度分布,分析了红磷烟幕在7.4μm^13.8μm波段的红外透过率和消光系数.测试了红磷烟幕对10.6μm激光的质量消光系数.根据M ie理论计算了红磷烟幕粒子对该波段红外的散射、吸收和消光效率因子.结果表明,在中等湿度条件下红磷烟幕对8.2μm^11.0μm红外和入射功率为1.0W的10.6μm激光的质量消光系数分别为0.424m2/g和0.396m2/g.红磷烟幕在成烟后10m in^30m in时间内粒度分布在0.5μm^3μm.平均粒度较小的红磷烟幕对中红外辐射的消光主要是吸收作用,随着烟幕粒度增加,散射作用和消光效果逐渐加强.

关键词：军事化学与烟火技术烟幕红外光谱Mie理论红磷消光系数

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论广东醒狮的多元传承路径

文化遗产 2023年第5期 96-103页

作者：赵萱中山大学社会学与人类学学院广东广州510275

自新文化运动以来,现代中国长期是以一种文化自省的方式,嫁接以现代性为基础的文化准则对自身进行改造,一定程度上造成了两个结果,一是在横向上,民族国家与文化的脱离,二是在纵向关系上,国家与社会关系的紧张。“非物质文化遗产”作为2... 详细信息

自新文化运动以来,现代中国长期是以一种文化自省的方式,嫁接以现代性为基础的文化准则对自身进行改造,一定程度上造成了两个结果,一是在横向上,民族国家与文化的脱离,二是在纵向关系上,国家与社会关系的紧张。“非物质文化遗产”作为21世纪中国在文化治理领域重要的文化概念与公共实践,不仅是要实现对传统文化进行保育和传承的任务,更是作为某种“中介”,校准以上两个关系上的分离,进而重建和创造地方。广东醒狮作为第一批国家级非物质文化遗产项目,经历了近20年的发展,逐渐形成了一套完备、有效的文化传承体系,但在多元现代性的理念之下,传承人作为地方性知识的承载者与遗产化的行动者却也衍生出不同的文化逻辑与传承路径,从而超越了以上两种二元关系的解释,形成了有关多元地方性的现代方案。

关键词：治理地方性知识遗产化醒狮非物质文化遗产

Advancing Energy Systems with In-Situ and Operando Surface-Enhanced Raman Scattering Spectroscopy

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CCS Chemistry 2024年第6期6卷 1403-1421页

作者： Haoming Bao Shi xuan Leong Jaslyn Ru Ting Chen Zhenhai Shi Suli Chen Yan Lv Tianxi Liu In Yee Phang Xing Yi Ling Key Laboratory of Synthetic and Biological Colloids Ministry of EducationInternational Joint Research Laboratory for Nano Energy CompositesSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122 School of Chemistry Chemical Engineering and BiotechnologyNanyang Technological UniversitySingapore 637371

Surface-enhanced Raman scattering spectroscopy(SERS)has emerged as a powerful analytical technique to enable nanoscale investigations of energy *** mini-review focuses on the applications of in-situ and operando SERS in energy-related research,highlighting its unique capabilities and significant contributions to understanding energy storage and conversion *** first introduce the fundamental principles of SERS,key SERS-derived techniques,and commonly employed ***,we delve into the diverse applications of in-situ and operando SERS across various energy systems,encompassing photocatalytic and electrocatalytic systems,fuel cells,solar cells,and ***,we conclude with our perspective on the current challenges and prospects in this *** hope thismini-review serves as an essential overview to guide the design and implementation of in-situ and operando SERS studies of energy systems.

关键词： surface-enhanced Raman scattering spectroscopy in-situ operando energy systems photocatalysis electrocatalysis fuel cells solar cells batteries

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球形碳酸锰微晶制备过程中的形貌控制

过程工程学报 2008年第2期8卷 280-284页

作者：粟海锋屈雄文衍宣童张法黎铉海广西大学化学化工学院广西南宁530004

以MnSO4和NH4HCO3为原料,采用低温化学沉淀法制备出了粒度主要为5～6μm的单分散MnCO3球形颗粒.通过扫描电镜研究了各种反应条件如温度、pH值、MnSO4和NH4HCO3浓度等对MnCO3颗粒形貌和粒度的影响,并初步探讨了其可能的生长机理.结果表明... 详细信息

以MnSO4和NH4HCO3为原料,采用低温化学沉淀法制备出了粒度主要为5～6μm的单分散MnCO3球形颗粒.通过扫描电镜研究了各种反应条件如温度、pH值、MnSO4和NH4HCO3浓度等对MnCO3颗粒形貌和粒度的影响,并初步探讨了其可能的生长机理.结果表明,溶液的pH值是影响MnCO3颗粒形貌的关键因素,当pH值在8.0～7.0范围内减小时,MnCO3颗粒形貌由立方形向球形转变.随着反应温度的降低,MnCO3颗粒的分散性趋好,其形貌也逐渐趋于形成均一的球形颗粒,但粒径增大.在实验范围内,NH4HCO3浓度控制在0.1～0.3mol/L有利于球形MnCO3颗粒的生成,MnSO4浓度在0.05～0.4mol/L变化对产物的形貌影响不大.XRD分析证实了沉淀产物为MnCO3晶体,属三方晶系,方解石晶型。

关键词：硫酸锰碳酸锰形貌控制球形颗粒

Zinc oxide nanoparticles with catalase-like nanozyme activity and near-infrared light response:A combination of effective photodynamic therapy,autophagy,ferroptosis,and antitumor immunity

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Acta Pharmaceutica Sinica B 2024年第10期14卷 4493-4508页

作者： Jingru Wang Man Liu Jingwen Wang Zhuoyue Li Zhenhan Feng Meiqi Xu Hui Wang Hui Li Zhantao Li Jianming Yu Junwei Liu Qingchao Wei Shuang Zhang xuan Zhang Department of Pharmaceutics School of Pharmaceutical SciencesPeking UniversityBeijing 100191China Beijing Key Laboratory of Molecular Pharmaceutics and New Drug Delivery Systems School of Pharmaceutical Sciences Peking UniversityBeijing 100191China School of Pharmaceutical Sciences Capital Medical UniversityBeijing 100069China Ningbo Institute of Marine Medicine Peking UniversityNingbo 315832China

We prepared biocompatible and environment-friendly zinc oxide nanoparticles(ZnO NPs)with upconversion properties and catalase-like nanozyme *** therapy(PDT)application is severely limited by the poor penetration of UV-Visible light and a hypoxic tumor ***,we used ZnO NPs as a carrier for the photosensitizer chlorin e6(Ce6)to construct zinc oxide-chlorin e6 nanoparticles(ZnO-Ce6 NPs),simultaneously addressing both *** terms of penetration,ZnO NPs convert 808 nm near-infrared light into 401 nm visible light to excite Ce6,achieving deep-penetrating photodynamic therapy under long-wavelength ***,the ability to emit short-wavelength light under long-wavelength light is usually observed in upconversion *** nanozymes,ZnO NPs can catalyze the decomposition of hydrogen peroxide in tumors,providing oxygen for photodynamic action and relieving *** enhanced photodynamic action produces a large amount of reactive oxygen species,which overactivate autophagy and trigger immunogenic cell death(ICD),leading to antitumor *** addition,even in the absence of light,ZnO and ZnO-Ce6 NPs can induce ferroptosis of tumor cells and exert antitumor effects.

关键词： Photodynamic therapy Near-infrared light Tissue penetration Catalase-like nanozyme Ferroptosis Autophagy Immunity Zinc oxide nanoparticles

A novel single event upset reversal in 40-nm bulk CMOS 6T SRAM cells

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Nuclear Science and Techniques 2015年第5期26卷 76-82页

作者：李鹏张民选赵振宇邓全 College of Computer National University of Defense Technology

In advanced technologies, single event upset reversal(SEUR) due to charge sharing can make the upset state of SRAM cells recover to their initial state, which can reduce the soft error for SRAMs in radiation environments. By using the full 3D TCAD simulations, this paper presents a new kind of SEUR triggered by the charge collection of the Off-PMOS and the delayed charge collection of the On-NMOS in commercial 40-nm 6 T SRAM cells. The simulation results show that the proposed SEUR can not occur at normal incidence,but can present easily at angular incidence. It is also found that the width of SET induced by this SEUR remains the same after linear energy transfer(LET) increases to a certain value. In addition, through analyzing the effect of the spacing, the adjacent transistors, the drain area, and some other dependent parameters on this new kind of SEUR, some methods are proposed to strengthen the recovery ability of SRAM cells.

关键词： SRAM单元单粒子翻转 CMOS 纳米静态存储器 CAD模拟初始状态状态恢复

The role of 3d orbitals in the bonding of phosphorus compounds

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Chinese Journal of Chemistry 1992年第2期10卷 97-106页

作者： LI,Le-Min XIAO,Li Department of Chemistry,Beijing University,Beijing 100871LIANG,Zhen-xuan Computer Center,Chinese Academy of Sciences,Beijing 100080 Department of Chemistry Beijing University Beijing 100871 Computer Center Chinese Academy of Sciences Beijing 100080

Ab initio LCAO-MO-SCF calculations for several typical molecules containing phosphorus have been undertaken to study the role of phosphorus 3d orbitals in the *** is emphasized that the discussion about the 3d orbital participation in bonding should be based on a reasonable choice of basis sets and it seems suitable to choose the atomic orbitals in proper molecular environment as the basis *** an approximation,the optimized minimal STO-NG basis sets have been adopted in the present *** results obtained well exhibit the model of 3d orbital participation in bonding. It is shown that under the influence of highly electronegative ligands the phosphorus 3d orbitals con- tract greatly,their energy levels drop considerably,and thus they can effectively participate in bond- *** presence of highly electronegative ligands seems *** contribution of 3d orbitals to bonding is achieved mainly through the concertedformation of σ bonds and p-d backbonds,though the contribution to σ bonding is *** three-center,four-electron bond modelis only approxi- mately *** results of the present paper demonstrate that the model of 3d orbital participation in bonding favoured by experimental chemists is reasonable and possesses sound ground.

关键词： The role of 3d orbitals in the bonding of phosphorus compounds