检索结果-南通市图书馆

Theoretical analysis of the double-differential cross-sections of neutron,proton,deuteron,^(3)He,andαfor the p+^(6) Li reaction

引用

Nuclear Science and Techniques 2024年第3期35卷 181-197页

作者： Fang-Lei Zou Xiao-Jun sun Jing-Shang Zhang Hai-Rui Guo Yin-Lu Han Rui-Rui Xu Xi Tao Ji-min Wang Xiao-Dong sun Yuan Tian Tao Ye Yong-Li Xu Chun-Tian Liang College of Physics Guangxi Normal University541004 GuilinChina Guangxi Key Laboratory of Nuclear Physics and Nuclear Technology 541004 GuilinChina China Institute of Atomic Energy P.O.Box 275(41)102413 BeijingChina Institute of Applied Physics and Computational Mathematics 10094 BeijingChina College of Physics and Electronic Shanxi Datong University037009 DatongChina School of Science Tianjin Chengjian University300384 TianjinChina

Based on the unified Hauser–Feshbach and exciton model,which can describe the particle emission processes between discrete energy levels with energy,angular momentum,and parity conservations,a statistical theory of light nucleus reaction(STLN)is developed to calculate the double-differential cross-sections of the outgoing neutron and light charged particles for the proton-induced^(6) Li reaction.A significant difference is observed between the p+^(6) Li and p+^(7) Li reactions owing to the discrepancies in the energy-level structures of the *** reaction channels,including sequential and simultaneous emission processes,are analyzed in *** the double-differential cross-sections of the outgoing proton as an example,the influence of contaminations(such as^(1) H,^(7)Li,^(12)C,and^(16)O)on the target is identified in terms of the kinetic energy of the first emitted *** optical potential parameters of the proton are obtained by fitting the elastic scattering differential *** calculated total double-differential cross-sections of the outgoing proton and deuteron at E_(p)=14 MeV agree well with the experimental data for different outgoing ***,the mixed double differential cross-sections of^(3) He andαare in good agreement with the *** agreement between the measured data and calculated results indicates that the two-body and three-body breakup reactions need to be considered,and the pre-equilibrium reaction mechanism dominates the reaction *** on the STLN model,a PLUNF code for the p+^(6) Li reaction is developed to obtain an ENDF-6-formatted file of the double-differential cross-sections of the nucleon and light composite charged particles.

关键词： Statistical theory of light nucleus reaction p+^(6)Li reaction Light composite charged particle Double-differential cross-sections Two-body breakup Three-body breakup

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A novel method for quantitatively identifying driving forces and evaluating their contributions to oil and gas accumulation

引用

Geoscience Frontiers 2024年第4期15卷 28-40页

作者： Bo Pang Xiongqi Pang Caijun Li Zhangxing Chen Huiyi Xiao Suyun Hu Siyu Zhang Lei Wang Yaoxi sun min Li Shasha Hui College of Geosciences China University of Petroleum(Beijing)Beijing 102249China State Key Laboratory of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing 102249China Chemical and Petroleum Engineering Schulich School of EngineeringUniversity of CalgaryCalgary T2N 1N4Canada Petroleum Exploration and Development Research Institute CNPCBeijing 100083China

Different driving forces govern the formation of distinct types of oil and gas accumulation and yield diverse oil and gas *** oil and gas reservoirs in basins are commonly formed by the combination of multiple *** is very difficult but essential to identify driving forces and evaluate their contributions in predicting the type and distribution of oil and gas *** this study,a novel method is proposed to identify driving forces and evaluate their contribution based on the critical conditions of porosity and permeability corresponding to buoyancy-driven hydrocarbon accumulation depth(BHAD).The application of this method to the Nanpu Sag of the Bohai Bay Basin shows that all oil and gas accumulations in the reservoirs are jointly formed by four driving forces:buoyance(Ⅰ),non-buoyance(Ⅱ),tectonic stress(Ⅲ1)and geofluid activity(Ⅲ2).Their contributions to all proven reserves are approxi-mately 63.8%,16.2%,2.9%,and 17.0%,*** contribution of the driving forces is related to the depth,distance to faults and unconformity *** dominates the formation of conven-tional reservoirs above BHAD,non-buoyant dominate the formation of unconventional reservoirs below BHAD,tectonic stress dominates the formation of fractured reservoirs within 300 m of a fault,and geoflu-ids activity dominates the formation of vuggy reservoirs within 100 m of an unconformity surface.

关键词： Driving forces Dynamic mechanisms Buoyancy-driven hydrocarbon accumulation depth Unconventional oil and gas Resources evaluation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Surface diffraction beamline at the SSRF

引用

Nuclear Science and Techniques 2024年第7期35卷 47-57页

作者： Yue-Liang Gu Xu Zheng Xing-min Zhang Bin Zhao Guang-Zhi Yin Da-ming Zhu Yuan-He sun Xing-Yu Gao Xiao-Long Li Shanghai Advanced Research Institute Chinese Academy of Sciences239 Zhangheng RoadPudong DistrictShanghai201204China

BL02U2 of the Shanghai Synchrotron Radiation Facility is a surface diffraction beamline with a photon flux of 5.5×10^(12) photons/s at 10 keV and a beam size of 160µm×80µm at the sample *** is dedicated to studying surfaces(solid-vacuum,solid-gas)and interfaces(solid-solid,solid-liquid,and liquid-liquid)in nanoscience,condensed matter,and soft matter systems using various surface scattering techniques over an energy range of 4.8-28 keV with transmission and reflection ***,BL02U2 has a high energy resolution,high angular resolution,and low beam divergence,which can provide excellent properties for X-ray diffraction experiments,such as grazing incident X-ray diffraction,X-ray reflectivity,crystal truncation rods,and liquid X-ray *** of in situ environments can also be provided for the samples *** paper describes the setup of the new beamline and its applications in various fields.

关键词： Surface and interface Beamline Surface diffraction Microstructure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Ocular surface changes in moderate-to-severe acne vulgaris

引用

International Journal of Ophthalmology(English edition) 2024年第6期17卷 1049-1057页

作者： Ci-Yi Pan Dong-Jie sun Han-Ling Li Li Ma min Zhang Song-Yuan Tang Hui Zhang Department of Ophthalmology First Affiliated Hospital of Kunming Medical UniversityKunming 650032Yunnan ProvinceChina Department of Dermatology First Affiliated Hospital of Kunming Medical UniversityKunming 650032Yunnan ProvinceChina Department of Stomatology the First People’s Hospital of Yunnan ProvinceKunming 650100Yunnan ProvinceChina Institute of Health Studies School of Public HealthKunming Medical UniversityKunming 650500Yunnan ProvinceChina

AIM:To investigate ocular surface disorders and tear function changes in patients with acne vulgaris and explore the potential relationship between acne vulgaris and dry ***:This cross-sectional study included right eyes of 53 patients with acne vulgaris and 54 healthy *** participants completed the Ocular Surface Disease Index(OSDI)*** following ocular surface-related parameters were measured:tear meniscus height(TMH),noninvasive tear breakup time(NIBUT),Schirmer I test(SIT),lipid layer thickness(LLT)score of the tear film,meibum score,meibomian gland orifice obstruction score,the ratio of meibomian gland loss,conjunctival hyperemia score,and corneal fluorescein staining(CFS)***:The stability of the tear film decreased in acne vulgaris *** the acne group,the TMH and NIBUT were lower,whereas the OSDI,meibum score,meibomian gland orifice obstruction score,ratio of meibomian gland loss,and conjunctival hyperemia score were higher compared with controls(P0.05).In two dry eye groups,the TMH,NIBUT,and LLT score were lower in the acne with dry eye(acne-DE)group,and the meibum score,meibomian gland orifice obstruction score,ratio of meibomian gland loss and conjunctival hyperemia score in the acne-DE group were higher(P0.05).CONCLUSION:Patients with moderate-to-severe acne vulgaris are more likely to experience dry eye than those without acne *** tear film stability and meibomian gland structure dysfunction are more pronounced in patients with moderate-to-severe acne and dry eye.

关键词： acne vulgaris meibomian gland dysfunction dry eye tear film

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

V0405 Dra:A New Deep and Low Mass Ratio Contact Binary with Extremely Fast Decrease in the Orbital Period

引用

Research in Astronomy and Astrophysics 2024年第6期24卷 287-293页

作者： Chao-Yue Li Lin-Qiao Jiang Jie Zheng Yi-Man Liu Xiao-Yu Long min sun Han-Lu Zhang Xiao-Man Tian School of Science Leshan Normal UniversityLeshan 614000China Center for Applied Optics Research Leshan Normal UniversityLeshan 614000China Key Laboratory of Detection and Application of Space Effect in Southwest Sichuan Leshan 614000China CAS Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China School of Aeronautics Shandong Jiaotong UniversityJinan 250000China

V0405 Dra is a W UMa-type binary *** on the TESS data,we have conducted an orbital period study and performed a light curve analysis for the *** orbital period study reveals that the O-C curve for V0405 Dra exhibits secular decrease at an extremely high rate of d P/dt=-2.71×10^(-6)day year^(-1),along with periodic variations characterized by an amplitude of A_(3)=0.0032 day and a period of P_(3)=1.413 *** orbital periodic change is possibly due to the light-travel time effect resulting from an additional third body in the system,for which we estimate a minimum mass of M_(3)=0.77M_(⊙).By employing the 2013 version of the Wilson-Devinney(W-D)method to synthesize a light curve,we derived photometric solutions indicating that V0405 Dra is a new deep(f=68.7%)and low-mass ratio(q=0.175)contact *** fast decrease in its orbital period is likely caused by mass transfer from the more massive primary star to the less massive secondary star,or due to angular momentum *** further mass transfer and loss of angular momentum,the binary will gradually evolve into a tighter contact configuration,eventually leading to a merger into a single star,following the evolutionary paths suggested for such deep and low mass ratio contact binaries.

关键词： (stars:)binaries(including multiple):close (stars:)binaries:eclipsing stars:individual(V0405 Dra)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Chemical and mechanical properties of stainless, environment-friendly, and nonflammable Mg alloys (SEN alloys): A review

引用

Journal of Magnesium and Alloys 2024年第3期12卷 841-872页

作者： Jong Un Lee Hyun Ji Kim Sang-Cheol Jin Ye Jin Kim Young min Kim Bong sun You Jun Ho Bae sung Hyuk Park Advanced Metals Division Korea Institute of Materials ScienceChangwon 51508Republic of Korea Department of Materials Science and Metallurgical Engineering Kyungpook National UniversityDaegu 41566Republic of Korea Missile Research Institute Agency for Defense DevelopmentDaejeon 34060Republic of Korea

This review article provides overall understanding of stainless,environment-friendly,and nonflammable Mg alloys(SEN alloys)recently developed at the Korea Institute of Materials *** alloys are produced by adding small amounts of Ca and Y(eachminor amounts of Ca and Y renders excellent mechanical properties due to improved strengthening *** enhanced properties are attributed to more pronounced dynamic recrystallization and grain refining behaviors caused by the second-phase particles during extrusion.(4)Despite the presence of various types of second-phase particles,the fatigue properties of SEN9 alloys are similar to those of commercial AZ91 alloys.(5)Simultaneous introduction of Ca and Y suppresses the formation of Mg17Al12 discontinuous precipitates during aging,leading to the enhanced elongation of aged SEN alloys.(6)Adding mischmetal into the SEN9 alloy leads to a six-fold enhancement in ***,the studies conducted on SEN alloys demonstrate their excellent ignition and corrosion resistances and mechanical properties,which broaden the industrial applications of Mg alloys by addressing their inherent weaknesses.

关键词： SEN magnesium alloy Corrosion resistance Ignition resistance Mechanical properties Extrudability.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

长沙市售新鲜蔬菜中硝酸盐含量的测定

引用

湖北农业科学 2012年第13期51卷 2834-2836页

作者：孙敏红吕燕君中南林业科技大学林学院长沙410004

以长沙市售13种主要蔬菜为材料,采用紫外分光光度法测定其硝酸盐含量。结果表明,不同类型蔬菜中的硝酸盐含量差异很大,其趋势为叶菜类>根菜类>瓜类>茄果类;同一类型蔬菜中的硝酸盐含量也不相同;且所测市售蔬菜中硝酸盐含量与国标相比,... 详细信息

以长沙市售13种主要蔬菜为材料,采用紫外分光光度法测定其硝酸盐含量。结果表明,不同类型蔬菜中的硝酸盐含量差异很大,其趋势为叶菜类>根菜类>瓜类>茄果类;同一类型蔬菜中的硝酸盐含量也不相同;且所测市售蔬菜中硝酸盐含量与国标相比,除冬瓜、黄瓜和茄子超标外,其余均达到食用标准。

关键词：紫外分光光度法市售新鲜蔬菜硝酸盐

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

How to manage the malposition of deep vein catheterization into the artery?

引用

Journal of Geriatric Cardiology 2024年第6期21卷 682-685页

作者： Jun-Na sun Hai DONG Peng CHEN Zi-Qi LI Li-You SUI Bin QI Quan-min JING Department of Cardiovascular Diseases the First Affiliated Hospital of Henan University of Chinese MedicineZhengzhouChina Department of Cardiology General Hospital of Northern Theater CommandShenyangChina

Central venous catheterization establishes temporary,efficient,and rapid use of deep venous access in patients,which provides high flow rate fluid perfusion,enables measurement of central venous pressure,and acts as an important reference for clinical ***,various complications such as pneumothorax,hemothorax,hematoma,and puncture failure can easily occur during the puncture and catheterization process.

关键词： process enable catheter

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

高校教师人格特征与工作绩效的关系:组织认同的调节作用

引用

教师教育研究 2017年第1期29卷 79-86页

作者：姜红孙健敏姜金秋首都经济贸易大学科研处北京100070 中国人民大学心理学系北京100872 首都经济贸易大学城市经济与公共管理学院北京100070

人格是个人所具有的稳定的心理和行为特征的总和,通过人格特征来预测工作绩效,长期以来一直是组织行为学领域备受关注的问题。本文用来自13所高校的865名高校教师的数据,通过实证研究揭示了人格特征与工作绩效的关系,并验证了组织认同... 详细信息

人格是个人所具有的稳定的心理和行为特征的总和,通过人格特征来预测工作绩效,长期以来一直是组织行为学领域备受关注的问题。本文用来自13所高校的865名高校教师的数据,通过实证研究揭示了人格特征与工作绩效的关系,并验证了组织认同在其中的调节作用。研究结果表明,大五人格特征的五个维度对高校教师的组织公民行为(OCB)都具有显著正向影响;大五人格特征的外倾性维度对高校教师的科研绩效具有显著正向影响;在组织认同的调节下,外倾性维度对高校教师的教学绩效也有显著正向影响;神经质维度对高校教师的科研工作绩效有显著的正向影响;责任感维度对高校教师的科研绩效具有显著正向影响;在组织认同的调节下,责任感维度对高校教师的OCB也有显著正向影响。

关键词：人格特征组织认同工作绩效组织公民行为

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

建设社会主义核心价值体系的实践解读

引用

沈阳工业大学学报（社会科学版） 2008年第3期1卷 262-267,288页

作者：孙洪敏辽宁社会科学院沈阳110031

建设社会主义核心价值体系是构筑中华民族的共同思想基础、形成强大民族凝聚力的要求。其具体实践包括:揭示社会主义核心价值体系的本质特征,坚定对中国化马克思主义的信念;增强社会主义意识形态的吸引力和凝聚力,坚持走中国特色社会主... 详细信息

建设社会主义核心价值体系是构筑中华民族的共同思想基础、形成强大民族凝聚力的要求。其具体实践包括:揭示社会主义核心价值体系的本质特征,坚定对中国化马克思主义的信念;增强社会主义意识形态的吸引力和凝聚力,坚持走中国特色社会主义道路;不断解决我们面临的重大理论和现实问题,坚持改革开放;继承中华民族的文化精神,加强社会主义荣辱观教育。

关键词：建设社会主义核心价值体系

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：