检索结果-南通市图书馆

Study of the pressure transient behavior of directional wells considering the effect of non-uniform flux distribution

引用

Petroleum Science 2024年第3期21卷 1765-1779页

作者： Yan-Zhong Liang Bai-Lu Teng wan-jing luo School of Energy Resources China University of Geosciences(Beijing)Beijing100083China

During the production,the fluid in the vicinity of the directional well enters the wellbore with different rates,leading to non-uniform flux distribution along the directional ***,in all existing studies,it is oversimplified to a uniform flux distribution,which can result in inaccurate results for field ***,this paper proposes a semi-analytical model of a directional well based on the assumption of non-uniform flux ***,the direction well is discretized into a carefully chosen series of linear sources,such that the complex well trajectory can be captured and the nonuniform flux distribution along the wellbore can be considered to model the three-dimensional flow *** using the finite difference method,we can obtain the numerical solutions of the transient flow within the *** the aid of Green's function method,we can obtain the analytical solutions of the transient flow from the matrix to the *** complete flow behavior of a directional well is perfectly represented by coupling the above two types of transient ***,on the basis of the proposed model,we conduct a comprehensive analysis of the pressure transient behavior of a directional *** computation results show that the flux variation along the direction well has a significant effect on pressure *** addition,the directional well in an infinite reservoir may exhibit the following flow regimes:wellbore afterflow,transition flow,inclined radial flow,elliptical flow,horizontal linear flow,and horizontal radial *** horizontal linear flow can be observed only if the formation thickness is much smaller than the well ***,a dip region that appears on the pressure derivative curve indicates the three-dimensional flow behavior near the wellbore.

关键词： Directional well Pressure transient behavior Semi-analytical model Non-uniform flux

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

Designing Electronic Structures of Multiscale Helical Converters for Tailored Ultrabroad Electromagnetic Absorption

引用

Nano-Micro Letters 2025年第1期17卷 439-455页

作者： Zhaobo Feng Chongbo Liu Xin Li Guangsheng luo Naixin Zhai Ruizhe Hu jing Lin Jinbin Peng Yuhui Peng Renchao Che Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle School of Environmental and Chemical EngineeringNanchang Hangkong UniversityNanchang 330063People’s Republic of China School of Physics and Materials Nanchang UniversityNanchang 330031People’s Republic of China Key Laboratory of Nondestructive Testing Ministry of EducationNanchang Hangkong UniversityNanchang 330063People’s Republic of China Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative MaterialsAcademy for Engineering and TechnologyFudan UniversityShanghai 200438People’s Republic of China

Atomic-scale doping strategies and structure design play pivotal roles in tailoring the electronic structure and physicochemical property of electromagnetic wave absorption(EMWA)***,the relationship between configuration and electromagnetic(EM)loss mechanism has remained ***,drawing inspiration from the DNA transcription process,we report the successful synthesis of novel in situ Mn/N co-doped helical carbon nanotubes with ultrabroad EMWA *** calculation and EM simulation confirm that the orbital coupling and spin polarization of the Mn–N4–C configuration,along with cross polarization generated by the helical structure,endow the helical converters with enhanced EM *** a result,HMC-8 demonstrates outstanding EMWA performance,achieving a minimum reflection loss of−63.13 dB at an ultralow thickness of 1.29 *** precise tuning of the graphite domain size,HMC-7 achieves an effective absorption bandwidth(EAB)of 6.08 GHz at 2.02 mm ***,constructing macroscale gradient metamaterials enables an ultrabroadband EAB of 12.16 GHz at a thickness of only 5.00 mm,with the maximum radar cross section reduction value reaching 36.4 dB *** innovative approach not only advances the understanding of metal–nonmetal co-doping but also realizes broadband EMWA,thus contributing to the development of EMWA mechanisms and applications.

关键词： Metal-nonmetal co-doping 3d-2p orbital coupling Spin polarization Helical structure Broadband EM wave absorption

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

The interaction between KIF21A and KANK1 regulates dendritic morphology and synapse plasticity in neurons

引用

Neural Regeneration Research 2025年第1期20卷 209-223页

作者： Shi-Yan Sun Lingyun Nie jing Zhang Xue Fang Hongmei luo Chuanhai Fu Zhiyi Wei Ai-Hui Tang Hefei National Research Center for Physical Sciences at the Microscale CAS Key Laboratory of Brain Function and DiseaseMinistry of Education Key Laboratory for Membrane-less Organelles and Cellular DynamicsDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhui ProvinceChina Institute of Artificial Intelligence Hefei Comprehensive National Science CenterHefeiAnhui ProvinceChina CAS Center for Excellence in Molecular Cell Sciences Division of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhui ProvinceChina Department of Neurobiology School of Life SciencesSouthern University of Science and TechnologyShenzhenGuangdong ProvinceChina Brain Research Center Southern University of Science and TechnologyShenzhenGuangdong ProvinceChina

Morphological alterations in dendritic spines have been linked to changes in functional communication between neurons that affect learning and ***-4 KIF21A helps organize the microtubule-actin network at the cell cortex by interacting with KANK1;however,whether KIF21A modulates dendritic structure and function in neurons remains *** this study,we found that KIF21A was distributed in a subset of dendritic spines,and that these KIF21A-positive spines were larger and more structurally plastic than KIF21A-negative ***,the interaction between KIF21A and KANK1 was found to be critical for dendritic spine morphogenesis and synaptic *** of either KIF21A or KANK1 inhibited dendritic spine morphogenesis and dendritic branching,and these deficits were fully rescued by coexpressing full-length KIF21A or KANK1,but not by proteins with mutations disrupting direct binding between KIF21A and KANK1 or binding between KANK1 and *** down KIF21A in the hippocampus of rats inhibited the amplitudes of long-term potentiation induced by high-frequency stimulation and negatively impacted the animals’cognitive *** together,our findings demonstrate the function of KIF21A in modulating spine morphology and provide insight into its role in synaptic function.

关键词： actin cytoskeleton dendrite KANK1 KIF21A microtubule spine morphology spine synaptic plasticity talin1

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

Impacts of Nutlin-3a and exercise on murine double minute 2-enriched glioma treatment

引用

Neural Regeneration Research 2025年第4期20卷 1135-1152页

作者： Yisheng Chen Zhongcheng Fan Zhiwen luo Xueran Kang Renwen wan Fangqi Li Weiwei Lin Zhihua Han Beijie Qi Jinrong Lin Yaying Sun Jiebin Huang Yuzhen Xu Shiyi Chen Department of Sport Medicine Huashan HospitalFudan UniversityShanghaiChina Department of Orthopedic Surgery Hainan Province Clinical Medical CenterHaikou Affiliated Hospital of Central South University Xiangya School of MedicineHaikouHainan ProvinceChina Department of Basic Medicine Shanghai Jiao Tong University School of MedicineShanghai Jiao Tong UniversityShanghaiChina Department of Neurosurgery Second Affiliated Hospital of Zhejiang University School of MedicineZhejiang UniversityHangzhouZhejiang ProvinceChina Department of Orthopedics Shanghai General HospitalSchool of Medicine Shanghai Jiao Tong UniversityShanghaiChina Department of Infectious Diseases Children’s Hospital of Fudan UniversityNational Children’s Medical CenterShanghaiChina Department of Rehabilitation The Second Affiliated Hospital of Shandong First Medical UniversityTaianShandong ProvinceChina

Recent research has demonstrated the impact of physical activity on the prognosis of glioma patients,with evidence suggesting exercise may reduce mortality risks and aid neural *** role of the small ubiquitin-like modifier(SUMO)protein,especially post-exercise,in cancer progression,is gaining attention,as are the potential anti-cancer effects of *** used machine learning to create the exercise and SUMO-related gene signature(ESLRS).This signature shows how physical activity might help improve the outlook for low-grade glioma and other *** demonstrated the prognostic and immunotherapeutic significance of ESLRS markers,specifically highlighting how murine double minute 2(MDM2),a component of the ESLRS,can be targeted by *** underscores the intricate relationship between natural compounds such as nutlin-3 and immune *** comprehensive CRISPR screening,we validated the effects of specific ESLRS genes on low-grade glioma *** also revealed insights into the effectiveness of Nutlin-3a as a potent MDM2 inhibitor through molecular docking and dynamic ***-3a inhibited glioma cell proliferation and activated the p53 *** efficacy decreased with MDM2 overexpression,and this was reversed by Nutlin-3a or *** using a low-grade glioma mouse model highlighted the effect of physical activity on oxidative stress and molecular pathway ***,both physical exercise and Nutlin-3a administration improved physical function in mice bearing tumors derived from MDM2-overexpressing *** results suggest the potential for Nutlin-3a,an MDM2 inhibitor,with physical exercise as a therapeutic approach for glioma *** research also supports the use of natural products for therapy and sheds light on the interaction of exercise,natural products,and immune regulation in cancer treatment.

关键词： exercise and SUMO-related gene signatures(ESLRS) glioblastoma management low-grade glioma natural bioactives neural regeneration physical exercise

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

页岩气井间干扰分析及井距优化

引用

天然气地球科学 2021年第7期32卷 931-940页

作者：陈京元位云生王军磊于伟齐亚东吴建发罗万静中国石油西南油气田公司四川成都610051 中国石油勘探开发研究院北京100083 美国德克萨斯州大学奥斯汀分校石油地质工程系奥斯汀78712 中国地质大学(北京)能源学院北京100083

页岩气井距设计与优化是评价页岩气开发效果的重要指标。在理论认识的基础上,根据类比法、数值模拟、经济评价方法论证,形成了从井间干扰模拟、动态数据诊断到多井生产模拟、井距优化的完整工作流程:①通过建立压力探测边界传播模型,模... 详细信息

页岩气井距设计与优化是评价页岩气开发效果的重要指标。在理论认识的基础上,根据类比法、数值模拟、经济评价方法论证,形成了从井间干扰模拟、动态数据诊断到多井生产模拟、井距优化的完整工作流程:①通过建立压力探测边界传播模型,模拟不同连通条件下井间干扰响应程度;②基于井间干扰响应规律,根据气井生产动态数据演绎识别、诊断井间干扰;③以地质解释和动态分析结果为基础参数,建立气藏体积压裂多井数值模型,模拟气田生产动态,结合净现值模型优化井距。以长宁国家级页岩气示范区宁201井区为例,模拟表明,减小井距可使得井间干扰提前发生,同时也提高区块整体采收率;基于目前的压裂规模和参数体系,300~400 m井距可进一步优化至260~320 m,单位面积内井数增加20%~30%,区块储量采收率提高10%左右;区块整体净现值随着生产年限不断增加,但对应的最优井距结果不随生产周期的改变而改变。

关键词：分段压裂水平井裂缝连通井间干扰井距优化净现值模型

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

欧盟转基因食品强制标识制度相关立法及其启示

引用

食品科学 2025年第2期46卷 290-298页

作者：张晶罗佼妮西南交通大学公共管理学院四川成都610031

转基因食品标识管理是保障食品安全的重要环节。欧盟对转基因食品强制标识的审慎监管为控制安全风险提供了新的路径选择,其通过不断扩大转基因食品标识范围、降低标识风险阈值、建立全过程追溯以及转基因成分检测体系,持续优化转基因食... 详细信息

转基因食品标识管理是保障食品安全的重要环节。欧盟对转基因食品强制标识的审慎监管为控制安全风险提供了新的路径选择,其通过不断扩大转基因食品标识范围、降低标识风险阈值、建立全过程追溯以及转基因成分检测体系,持续优化转基因食品标识制度并构建了完善的法律体系,呈现出转基因食品安全监管的强制性特色。本文通过回顾欧盟转基因食品强制标识制度的历史沿革,总结出其主要立法内容和法律体系的显著特征,提出完善我国转基因食品标识制度的3项立法建议以及建立追溯、检测和惩罚救济的配套措施等,以期为解决我国转基因食品标识制度所存在的问题提供创新思路。

关键词：欧盟转基因食品强制标识可追溯

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

蛋白质组研究中肽质量指纹谱鉴定方法的建立及应用

引用

生物化学与生物物理学报 2000年第4期32卷 373-378页

作者：王京兰万晶宏罗凌熊少祥王光辉贺福初钱小红军事医学科学院国家生物医学分析中心!北京100850 军事医学科学院放射医学研究所!北京100850 中国科学院化学所国家质谱中心!北京100080 军事医学?

建立了用肽质量指纹谱和数据库检索方法鉴定凝胶电泳分离蛋白质的方法。用标准蛋白质对胶上蛋白质原位酶切制备肽谱的方法进行了讨论。分析了实际细胞蛋白质样品 ,获得了双向电泳分离的人肺癌细胞蛋白质谱中三个蛋白质点的肽指纹谱 ,并... 详细信息

建立了用肽质量指纹谱和数据库检索方法鉴定凝胶电泳分离蛋白质的方法。用标准蛋白质对胶上蛋白质原位酶切制备肽谱的方法进行了讨论。分析了实际细胞蛋白质样品 ,获得了双向电泳分离的人肺癌细胞蛋白质谱中三个蛋白质点的肽指纹谱 ,并通过数据库检索分别鉴定为甘油醛 3 磷酸脱氢酶 2、遍在蛋白羧基末端水解同工酶和丙糖磷酸异构酶。

关键词：蛋白质组肽质量指纹谱人肺癌细胞双向电泳基质辅助激光解吸/电离飞行时间质谱

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

EFFECT OF A MOVING BOUNDARY ON THE FLUID TRANSIENT FLOW IN LOW PERMEABILITY RESERVOIRS

引用

Journal of Hydrodynamics 2012年第3期24卷 391-398页

作者： luo wan-jing wanG Xiao-dong School of Energy Resources China University of Geosciences Beijing 100083 China

In a low permeability reservoir, the existence of a moving boundary is considered in the study of the transient porous flow with threshold pressure gradient. The transmission of the moving boundary directly indicates the size of the drainage area as well as the apparent influences on the pressure behavior. The nonlinear transient flow mathematical model in which the threshold pressure gradient and the moving boundary are incorporated is solved by advanced mathematical methods. This paper presents some new analytical solutions describing the pressure distribution at a constant rate and the production decline in a constant pressure production with the boundary propagation. It is shown that the greater the threshold pressure gradient, the slower the transmission of the moving boundary, the larger the pressure loss will be, and there is no radial flow in the middle and later phases of the wellface pressure for a well at a constant rate. We have the the maximum moving boundary at a specific drawdown pressure for a low permeability reservoir The greater the threshold pressure gradient, the smaller the maximum moving boundary distance, the quicker the production decline for a well in a constant pressure production will be. The type curve charts for the modern well test analysis and the rate transient analysis with a moving boundary are obtained and the field test and the production data are interpreted as examples to illustrate how to use our new results.

关键词： threshold pressure gradient moving boundary well test analysis low permeability reservoir rate transient analysis

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

Advanced Functional Electromagnetic Shielding Materials:A Review Based on Micro‑Nano Structure Interface Control of Biomass Cell Walls

引用

Nano-Micro Letters 2025年第1期17卷 98-134页

作者： Yang Shi Mingjun Wu Shengbo Ge Jianzhang Li Anoud Saud Alshammari jing luo Mohammed A.Amin Hua Qiu Jinxuan Jiang Yazeed M.Asiri Runzhou Huang Hua Hou Zeinhom M.El‑Bahy Zhanhu Guo Chong Jia Kaimeng Xu Xiangmeng Chen Co‑Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037People’s Republic of China State Key Laboratory of Efficient Production of Forest Resourced Beijing Forestry UniversityQinghua East Road 35Haidian DistrictBeijing 100083People’s Republic of China Department of Physics Faculty of Sciences‑ArarNorthern Border UniversityArar 91431Saudi Arabia Department of Chemistry College of ScienceTaif UniversityP.O.Box 1109921944 TaifSaudi Arabia Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’anShaanxi 710072People’s Republic of China Integrated Composites Lab Department of Mechanical and Construction EngineeringNorthumbria UniversityNewcastle Upon Tyne NE18STUK College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024People’s Republic of China Department of Chemistry Faculty of ScienceAl-Azhar UniversityNasr CityCairo 11884Egypt Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products International Joint Research Center for Biomass MaterialsSouthwest Forestry UniversityKunming 650224People’s Republic of China School of Science Henan Agricultural UniversityZhengzhou 450002People’s Republic of China

Research efforts on electromagnetic interference(EMI)shielding materials have begun to converge on green and sustainable biomass *** materials offer numerous advantages such as being lightweight,porous,and *** to their porous nature,interfacial compatibility,and electrical conductivity,biomass materials hold significant potential as EMI shielding *** concerted efforts on the EMI shielding of biomass materials have been reported,this research area is still relatively new compared to traditional EMI shielding *** particular,a more comprehensive study and summary of the factors influencing biomass EMI shielding materials including the pore structure adjustment,preparation process,and micro-control would be *** preparation methods and characteristics of wood,bamboo,cellulose and lignin in EMI shielding field are critically discussed in this paper,and similar biomass EMI materials are summarized and *** composite methods and fillers of various biomass materials were *** paper also highlights the mechanism of EMI shielding as well as existing prospects and challenges for development trends in this field.

关键词： Biomass materials Electromagnetic interference shielding Micro-nano structure interface control Conductivity

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

数字经济赋能养老服务业跨越“低水平均衡陷阱”

引用

河北学刊 2025年第1期45卷 152-161页

作者：夏杰长罗敬蔚中国社会科学院财经战略研究院中央财经大学法学院

中国养老服务业正面临低水平需求与高成本供给之间的矛盾,这直接导致养老服务业陷入“低水平均衡陷阱”。数字经济在优化养老资源配置、降低养老服务成本和完善养老生态系统等方面发挥了重要作用,是跨越养老服务业“低水平均衡陷阱”的... 详细信息

中国养老服务业正面临低水平需求与高成本供给之间的矛盾,这直接导致养老服务业陷入“低水平均衡陷阱”。数字经济在优化养老资源配置、降低养老服务成本和完善养老生态系统等方面发挥了重要作用,是跨越养老服务业“低水平均衡陷阱”的重要力量。借力数字经济推动养老服务实现高水平均衡,进而实现养老服务业高质量发展,需要综合施策:适当延长老年群体工作年限;对老年人口进行数字技术培训,助力他们跨越数字鸿沟;利用数字技术优化养老服务的资源配置;多渠道降低养老服务业成本;提升从业人员数字素养。

关键词： “低水平均衡陷阱” 老龄化数字经济养老服务业

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：