检索结果-南通市图书馆

Mechanical characteristics and reservoir stimulation mechanisms of the Gulong shale oil reservoirs, the northern Songliao Basin

引用

Petroleum Science 2024年第3期21卷 2023-2036页

作者： Si-Wei Meng Jia-Ping Tao Tian-Jiao li Dong-Xu li Su-ling Wang liu Yang Xin liu li-hao liang He liu PetroChina Research Institute of Petroleum Exploration Development Beijing100083China National Key Laboratory of Continental Shale Oil Daqing 163002HeilongjiangChina Dalian University of Technology Dalian116024LiaoningChina PetroChina Daqing Oilfield Co.Ltd. Daqing163002HeilongjiangChina Northeast Petroleum University Daqing163002HeilongjiangChina China University of Mining and Technology(Beijing) Beijing100083China

Shale oil of the Qingshankou Formation of the Gulong Sag,the northern Songliao Basin,represents the first attempt at large-scale development of pure-shale-type shale oil in *** integrating the multiscale refined reservoir characterization with macro-micro-scale mechanical testing,it is clarified that the Gulong shale is characterized by high clay mineral content,high rock plasticity,highly-developed bedding,and prominent mechanical anisotropy.A three-dimensional(3D)fracture propagation model of hydraulic fracturing was built for the Gulong shale,which fully captures the hydraulic fracture distribution pattern affected by the high bedding density,in-situ stress,and fracturing treatment *** research showed that due to influences of bedding,hydraulic fracturing in the Gulong shale forms a complex fracture morphology featuring the main fracture with multiple perpendicular branches that have different lengths(like the outdoor directional TV antenna);however,the vertical propagation of fractures is inhibited,and the fracture height is commonly less than 10 *** limited stimulated reservoir volume(SRV)is the main problem facing the fracturing stimulation of the Gulong shale *** density has vital effects on fracture morphology,so case-specific fracturing designs shall be developed for shale intervals with different bedding development *** reservoirs with welldeveloped bedding,it is suggested to properly increase the perforation cluster spacing and raise the volume and proportions of viscous fluids of the pad,so as to effectively promote vertical fracture propagation and improve reservoir stimulation *** study integrates multi-scale fine reservoir characterization and macro-micro-scale mechanical testing,as well as the construction and numerical simulation of hydraulic fracturing models for high-density layered shale reservoirs,providing a new approach and methodological framework for the fracturing research of high-density layer

关键词： Shale oil Hydraulic fracturing High bedding density Fracture propagation model

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

MRPL37在结直肠癌中的表达及与临床病理的相关性

引用

中国现代普通外科进展 2024年第7期27卷 517-521页

作者：滕文豪郝立亮李光陈心锐锦州医科大学临沂市人民医院研究生培养基地山东临沂276007 临沂市人民医院胃肠外科山东临沂276007

目的:探究线粒体核糖体蛋白L37(MRPL37)在结直肠癌中的表达及意义。方法:从TCGA和GEO数据库中下载结直肠癌患者的RNA-seq数据和临床资料,用于MRPL37在结直肠癌中的差异表达、临床病理特征、预后等分析。富集分析探讨MRPL37参与的生物学... 详细信息

目的:探究线粒体核糖体蛋白L37(MRPL37)在结直肠癌中的表达及意义。方法:从TCGA和GEO数据库中下载结直肠癌患者的RNA-seq数据和临床资料,用于MRPL37在结直肠癌中的差异表达、临床病理特征、预后等分析。富集分析探讨MRPL37参与的生物学功能和信号通路,利用TISID数据库分析MRPL37与免疫浸润细胞的相关性。结果:MRPL37在结直肠癌中高表达(P<0.05),并且其表达水平与结直肠癌患者的T分期(P=0.0041)、N分期(P=0.0053)和TNM分期(P=0.0159)显著相关。富集分析提示,在结直肠癌中,MRPL37主要参与线粒体生理活动、细胞周期、氧化磷酸化等途径。在肿瘤免疫方面,MRPL37表达量的改变与肿瘤微环境中多种类型的免疫细胞的变化相关。MRPL37是一个独立预后因素(P=0.011),其表达水平与患者的预后成正相关(P=0.0017)。结论:MRPL37可能是结直肠癌的一种新的生物标志物,未来可用于预测患者预后及指导精准诊疗。

关键词：结直肠肿瘤 MRPL37 生物标志物淋巴细胞肿瘤免疫微环境

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

模糊集合下多传感器信息融合算法仿真

引用

计算机仿真 2024年第7期41卷 276-280页

作者：靳双燕李浩亮郑州工商学院信息工程学院河南郑州450000 郑州大学电气与信息工程学院河南郑州450000

多传感器数据融合通常涉及大量数据,受到噪声、不完整性、不准确性等因素的影响,导致融合结果的不确定性增加。为此,提出一种基于模糊集合的多传感器信息融合算法。利用局部保持投影(Locality Preserving Projection, LPP)处理多传感器... 详细信息

多传感器数据融合通常涉及大量数据,受到噪声、不完整性、不准确性等因素的影响,导致融合结果的不确定性增加。为此,提出一种基于模糊集合的多传感器信息融合算法。利用局部保持投影(Locality Preserving Projection, LPP)处理多传感器信息,采用主成分分析(Principal Component Analysis, PCA)分离特征值较大的反射信号,删除特征值较小的随机噪声。利用隶属函数得到不同传感器提供的可信度,将支持度以及可信度转换为基本概率分配函数,引入证据理论(Dempster-Shafer, D-S),实现多传感器信息融合优化。仿真分析表明,所提方法可以得到高精度和高效率的多传感器信息融合结果,峰值信噪比达60dB以上,信噪比一直处于12dB以上,融合最长耗时仅为2.01ms,使其融合性能得到有效优化。

关键词：模糊集合多传感器信息融合优化

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

高速公路拓宽工程桩承式加筋路堤荷载传递与变形规律分析

引用

武汉理工大学学报 2024年第5期46卷 83-89页

作者：芮瑞李良昊刘敏胡向东武汉理工大学基建处武汉430070 武汉理工大学土木工程与建筑学院武汉430070 广东省高速公路有限公司广州510000 中国铁建港航局集团有限公司第一工程分公司广州510000

为深入探讨高速公路拓宽工程中的桩承式加筋路堤荷载传递与变形规律,选取一个断面开展了现场试验。通过埋设监测设备,对该断面新老路堤交接部位的桩顶和桩间土竖向土压力、路堤沉降变形进行了测试。结果表明:在加载结束后竖向荷载向新... 详细信息

为深入探讨高速公路拓宽工程中的桩承式加筋路堤荷载传递与变形规律,选取一个断面开展了现场试验。通过埋设监测设备,对该断面新老路堤交接部位的桩顶和桩间土竖向土压力、路堤沉降变形进行了测试。结果表明:在加载结束后竖向荷载向新路堤产生了一定程度的扩散,导致新路堤区域土压力在等载期持续增长。工程中,桩土差异沉降较小,导致土工格室的张拉膜效应发挥程度有限。不同路堤高程处的土压力与分层沉降数据均表明,土拱效应发挥高度以及等沉面高度大致为桩间净距的1.25倍。

关键词：拓宽工程桩承式加筋路堤现场试验土压力沉降

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 nanofluid of modified carbon black nanoparticles for enhanced oil recovery in low permeability reservoirs

引用

Petroleum Science 2023年第3期20卷 1598-1607页

作者： Guang Zhao li-hao liang Dong-Fang Lv Wen-Juan Ji Qing You Cai-li Dai School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580Shandongthe People's Republic of China Research Institute of Petroleum Exploration&Development PetroChinaBejing100083the People's Republic of China School of Energy Resources China University of Geosciences(Beijing)Bejing100083the People's Republic of China

A novel nanofluid of modified carbon black(MCB)nanoparticles was initially developed for enhanced oil recovery(EOR)in low permeability *** MCB nanoparticles were obtained via a three-step reaction involving modification by oxidation,acyl chlorination,and activated *** nano-particles were spherically dispersed,with an average size of 72.3 *** with carbon black(CB)nanoparticles,dispersed MCB nanoparticles can effectively reduce the oil-water interfacial tension(IFT)to 10^(-2)mN/m and change the surface wettability of sand *** on the results of core flooding experiments,the MCB nanoparticles exhibited a better EOR capacity than surfactants and CB nano-particles,and the final oil recovery was significantly increased by 27.27%.The core scanning test showed that the MCB nanoparticles could plug high permeability channels by adsorbing onto the surfaces of sand particles and forming larger aggregates that bridge across pores or throats,resulting in a higher swept *** synergistic effects of improved swept volume and oil displacement efficiency were the EOR mechanisms of the MCB *** studies indicate that these MCB nanoparticles have excellent potential for EOR in low permeability reservoirs.

关键词： Modified carbon black nanoparticles Interfacial tension reduction Displacement efficiency Synergistic effects Enhanced oil recovery

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

MLDA:a multi-level k-degree anonymity scheme on directed social network graphs

引用

Frontiers of Computer Science 2024年第2期18卷 199-215页

作者： Yuanjing hao Long li liang CHANG Tianlong GU Guangxi Key Laboratory of Trusted Software Guilin University of Electronic TechnologyGuilin 541004China Engineering Research Center of Trustworthy AI(Ministry of Education) Jinan UniversityGuangzhou 510632China

With the emergence of network-centric data,social network graph publishing is conducive to data analysts to mine the value of social networks,analyze the social behavior of individuals or groups,implement personalized recommendations,and so ***,published social network graphs are often subject to re-identification attacks from adversaries,which results in the leakage of users’***-anonymity technology is widely used in the field of graph publishing,which is quite effective to resist re-identification ***,the current researches still exist some issues to be solved:the protection of directed graphs is less concerned than that of undirected graphs;the protection of graph structure is often ignored while achieving the protection of nodes’identities;the same protection is performed for different users,which doesn’t meet the different privacy requirements of ***,to address the above issues,a multi-level-degree anonymity(MLDA)scheme on directed social network graphs is proposed in this ***,node sets with different importance are divided by the firefly algorithm and constrained connectedness upper approximation,and they are performed different-degree anonymity protection to meet the different privacy requirements of ***,a new graph anonymity method is proposed,which achieves the addition and removal of edges with the help of fake *** addition,to improve the utility of the anonymized graph,a new edge cost criterion is proposed,which is used to select the most appropriate edge to be ***,to protect the community structure of the original graph as much as possible,fake nodes contained in a same community are merged prior to fake nodes contained in different *** results on real datasets show that the newly proposed MLDA scheme is effective to balance the privacy and utility of the anonymized graph.

关键词： directed social network graph graph publishing k-degree anonymity community structure graph utility

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

灯盏花素对急性心肌梗死大鼠的心肌保护作用及机制研究

引用

安徽医专学报 2024年第3期23卷 78-81页

作者：李浩亮许邦龙胡广全高峰安徽医科大学第二附属医院心血管内科安徽合肥230601

目的:探讨灯盏花素对急性心肌梗死(AMI)大鼠的心肌保护作用及其分子机制。方法:将32只SD大鼠随机均分为假手术组、AMI组、AMI+灯盏花素组,AMI+灯盏花素+LY294002组。通过超声心动图、TUNEL染色、EliSA、Western blot和qRT-PCR等多种检... 详细信息

目的:探讨灯盏花素对急性心肌梗死(AMI)大鼠的心肌保护作用及其分子机制。方法:将32只SD大鼠随机均分为假手术组、AMI组、AMI+灯盏花素组,AMI+灯盏花素+LY294002组。通过超声心动图、TUNEL染色、EliSA、Western blot和qRT-PCR等多种检测方法,探究各组大鼠的心功能、心肌细胞凋亡率、心肌损伤程度、凋亡相关分子以及PI3K/Akt信号通路的表达情况。结果:与假手术组比较,AMI组大鼠的心脏收缩功能降低,心肌细胞凋亡率显著增加,心肌损伤严重;与AMI组比较,AMI+灯盏花素组的上述病理改变明显减轻;当加入PI3K的特异性抑制剂LY294002后,灯盏花素对AMI大鼠的治疗作用被削弱。结论:灯盏花素可能是通过激活PI3K/Akt信号通路抑制心肌细胞凋亡,从而减轻AMI导致的大鼠心肌损伤,改善心功能。

关键词：灯盏花素急性心肌梗死 PI3K/Akt信号通路细胞凋亡

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 Hybrid Level Set Optimization Design Method of Functionally Graded Cellular Structures Considering Connectivity

引用

Computers, Materials & Continua 2024年第4期79卷 1-18页

作者： Yan Dong Kang Zhao liang Gao hao li The State Key Lab of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan430074China Institute of Systems Engineering China Academy of Engineering PhysicsMianyang621900China

With the continuous advancement in topology optimization and additive manufacturing(AM)technology,the capability to fabricate functionally graded materials and intricate cellular structures with spatially varying microstructures has grown ***,a critical challenge is encountered in the design of these structures–the absence of robust interface connections between adjacent microstructures,potentially resulting in diminished efficiency or macroscopic failure.A Hybrid Level Set Method(HLSM)is proposed,specifically designed to enhance connectivity among non-uniform microstructures,contributing to the design of functionally graded cellular *** HLSM introduces a pioneering algorithm for effectively blending heterogeneous microstructure ***,an interpolation algorithm is presented to construct transition microstructures seamlessly connected on both ***,the algorithm enables the morphing of non-uniform unit cells to seamlessly adapt to interconnected adjacent *** method,seamlessly integrated into a multi-scale topology optimization framework using the level set method,exhibits its efficacy through numerical examples,showcasing its prowess in optimizing 2D and 3D functionally graded materials(FGM)and multi-scale topology *** essence,the pressing issue of interface connections in complex structure design is not only addressed but also a robust methodology is introduced,substantiated by numerical evidence,advancing optimization capabilities in the realm of functionally graded materials and cellular structures.

关键词： Hybrid level set method functionally graded cellular structure connectivity interpolated transition optimization design

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

Epidemic Spread in Networks Induced by Deactivation Mechanism

引用

Communications in Theoretical Physics 2008年第5期49卷 1357-1360页

作者： YU Xiao-ling WU Xiao ZHANG Duan-Ming li Zhi-hao liang Fang WANG Xiao-Yu Department of Physics Huazhong University of Science and Technology Wuhan 430074 China

We have studied the topology and epidemic spreading behaviors on the networks in which deactivation mechanism and long-rang connection are coexisted. By means of numerical simulation, we find that the clustering coefficient C and the Pearson correlation coefficient r decrease with increasing long-range connection μ and the topological state of the network changes into that of BA model at the end （when μ = 1）. For the Susceptible-Infect-Susceptible model of epidemics, the epidemic threshold can reach maximum value at μ = 0.4 and presents two different variable states around μ= 0.4.

关键词： epidemic threshold deactivation mechanism long-rang connection

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

An intelligent control method based on artificial neural network for numerical flight simulation of the basic finner projectile with pitching maneuver

引用

Defence Technology（防务技术） 2024年第2期32卷 663-674页

作者： Yiming liang Guangning li Min Xu Junmin Zhao Feng hao Hongbo Shi Northwestern Polytechnical University School of Astronautics Xi’an 710072China China North Industries Group Corporation No 203 Research Institute Xi’an 710065China

In this paper,an intelligent control method applying on numerical virtual flight is *** proposed algorithm is verified and evaluated by combining with the case of the basic finner projectile model and shows a good application ***,a numerical virtual flight simulation model based on overlapping dynamic mesh technology is *** order to verify the accuracy of the dynamic grid technology and the calculation of unsteady flow,a numerical simulation of the basic finner projectile without control is carried *** simulation results are in good agreement with the experiment data which shows that the algorithm used in this paper can also be used in the design and evaluation of the intelligent controller in the numerical virtual flight ***,combined with the real-time control requirements of aerodynamic,attitude and displacement parameters of the projectile during the flight process,the numerical simulations of the basic finner projectile’s pitch channel are carried out under the traditional PID(Proportional-Integral-Derivative)control strategy and the intelligent PID control strategy *** intelligent PID controller based on BP(Back Propagation)neural network can realize online learning and self-optimization of control parameters according to the acquired real-time flight *** with the traditional PID controller,the concerned control variable overshoot,rise time,transition time and steady state error and other performance indicators have been greatly improved,and the higher the learning efficiency or the inertia coefficient,the faster the system,the larger the overshoot,and the smaller the stability *** intelligent control method applying on numerical virtual flight is capable of solving the complicated unsteady motion and flow with the intelligent PID control strategy and has a strong promotion to engineering application.

关键词： Numerical virtual flight Intelligent control BP neural network PID Moving chimera grid

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：