检索结果-南通市图书馆

Changes in filtration and capacitance properties of highly porous reservoir in underground gas storage:CT-based and geomechanical modeling

引用

Journal of Rock Mechanics and Geotechnical Engineering 2024年第8期16卷 2982-2995页

作者： Valerii Khimulia Vladimir Karev yury kovalenko Svyatoslav Barkov Ishlinsky Institute for Problems in Mechanics RAS Moscow119526Russia

The paper presents the results of comprehensive studies of filtration and capacitance properties of highly porous reservoir rocks of the aquifer of an underground gas storage *** geomechanical part of the research included studying the dependence of rock permeability on the stress-strain state in the vicinity of the wells,and physical modeling of the implementation of the method of increasing the permeability of the wellbore zone-the method of directional unloading of the *** digital part of the research included computed tomography(CT)-based computer analysis of the internal structure,pore space characteristics,and filtration properties before and after the *** to the results of physical modeling of deformation and filtration processes,it is found that the permeability of rocks before fracture depends on the stress-strain state insignificantly,and this influence is ***,when downhole pressure reaches 7-8 MPa,macrocracks in the rock begin to grow,accompanied by irreversible permeability ***,geodesic tortuosity and permeability values were obtained based on digital studies and numerical modeling.A weak degree of transversal anisotropy of the filtration properties of rocks was *** on the analysis of pore size distribution,pressure field and flow velocities,high homogeneity and connectivity of the rock pore space is *** absence of pronounced changes in pore space characteristics and pore permeability after non-uniform triaxial loading rocks was *** the basis of geometrical analysis of pore space,the reasons for weak permeability anisotropy were *** filtration-capacitance properties obtained from the digital analysis showed very good agreement with the results of field and laboratory *** physical modeling has confirmed the efficiency of application of the directional unloading method for the reservoir under *** necessary parameters of its application were calcu

关键词： Permeability anisotropy Reservoir porosity Rocks computed tomography(CT) Digital core analysis Filtration flow numerical modeling

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

Rare primary mature teratoma of the liver:A case report

引用

World Journal of Hepatology 2021年第12期13卷 2192-2200页

作者： yury a kovalenko yury O Zharikov Yana V Kiseleva Anton B Goncharov Tatyana V Shevchenko Beslan N Gurmikov Dmitry V Kalinin Alexey V Zhao Department of Surgical Oncology and Chemotherapy A.V.Vishnevsky National Medical Research Center of Surgery of the Russian Ministry of HealthcareMoscow 115093Russia Department of Human Anatomy Sechenov First Moscow State Medical University(Sechenov University)Moscow 119048Russia International School“Medicine of the Future” Sechenov First Moscow State Medical University(Sechenov University)Moscow 119048Russia Pathology Department A.V.Vishnevsky National Medical Research Center of Surgery of the Russian Ministry of HealthcareMoscow 115093Russia

BACKGROUND Primary liver teratoma is an extremely rare tumor usually affecting children under the age of 3 *** signs of teratoma on ultrasound,computed tomography(CT)or magnetic resonance imaging are lacking,which makes morphology the only diagnostic *** of a mature teratoma may lead to excessive liver resection,whereas misdiagnosis of an immature teratoma may result in spread,causing a life-threatening ***,a careful tumor examination is important,and the rarest types of tumors must be accounted *** SUMMARY We describe a 52 years old female who presented with a solid mass in the left liver ***-enhanced CT and magnetic resonance imaging(MRI)revealed a round,heterogeneous lesion containing a number of fluid areas and areas of calcification in the middle,and the provisional diagnosis was *** patient underwent resection of liver segment *** analysis of the resected lesion indicated thyroid follicular epithelium;however,the thyroid gland was intact.10 years prior to presentation the patient underwent a surgery due to mature teratoma of the right ovary,nevertheless the tumor was benign and could not spread to the liver,in addition teratoma of the liver was also *** led to the final diagnosis of primary mature liver *** Primary hepatic teratoma,including heterotopia of the thyroid gland in the liver,is an extremely rare condition in adults that needs to be considered in the differential diagnosis of solid-cystic neoplasms in the liver and *** case adds to the limited literature on the patient presentation,clinical workup and management of liver teratomas.

关键词： Case report Primary liver teratoma Ectopic thyroid gland tissue Mature teratoma Epidermoi cyst

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

Preliminary results of lithological and palynological study of Svobodny, ancient man's parking relic in Amur region, Russia

引用

Global Geology 2024年

作者： kovalenko S.V. Kezina T.V. Kryuchko E.I. Mironov M.A. Amur State University Center for the Preservation of Historical and Cultural Heritage of the Amur Region

Asingle-layermonumentSvobodny,ancientman’sparkinglot-1,discoveredin2021aspart of archaeological work to study the zone of economic development of the Amur region was investigated lithologically and palynologically. Based on the results of geomorphological analysis of the territory, the study of artifacts, palynological data, as well as analogy with previously identified and sufficiently studied relics in the region, the existence of the Osinoozersk late Neolithic culture in this territory is assumed. The time of its expansion in the Amur region is determined within the framework of the second half of the IV millennium BC to the first half of the II millennium BC. The preliminary results of palynological analysis suggest the existence of a temperate climate here, was close to the modern one, which does not contradict the reconstructed paleoclimate and environments of the region during the Holocene period.

关键词：

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

Preliminary results of lithological and palynological study of Svobodny,ancient man’s parking relic in Amur region,Russia

引用

Global Geology 2024年第3期27卷 121-131页

作者： kovalenko S.V. Kezina T.V. Kryuchko E.I. Mironov M.A. Center for the Preservation of Historical and Cultural Heritage of the Amur Region Blagoveshchensk 675000Russia Amur State University Blagoveshchensk 675027Russia

A single-layer monument Svobodny,ancient man's parking lot-1,discovered in 2021 as part of archaeological work to study the zone of economic development of the Amur region was investigated lithologically and *** on the results of geomorphological analysis of the territory,the study of artifacts,palynological data,as well as analogy with previously identified and sufficiently studied relics in the region,the existence of the Osinoozersk late Neolithic culture in this territory is *** time of its expansion in the Amur region is determined within the framework of the second half of the IV millennium BC to the first half of the II millennium *** preliminary results of palynological analysis suggest the existence of a temperate climate here,was close to the modern one,which does not contradict the reconstructed paleoclimate and environments of the region during the Holocene period.

关键词： Osinoozersk culture palynological spectra Zeya River paleoclimate

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

Belgica antarctica(Diptera: Chironomidae): A natural modelorganism for extreme environments

引用

Insect Science 2022年第1期29卷 2-20页

作者： Iryna Kozeretska Svitlana Serga Pavlo kovalenko Volodymyr Gorobchyshynand Peter Convey National Antarctic Scientific Center of Ukraine 01601Taras Shevchenko blv.16KyivUkraine Taras Shevchenko National Universityof Kyiv Department General and Medical Genetics01601Volodymyrska str.64/13KyivUkraine State Institution«Institute for Evolu-tionary Ecology of the National Academy of Sciences of Ukraine» Department of Population Dynamics03143Lebedeva str.37KyivUkraine and4British Antarctic SurveyNERCHigh CrossMadingley RoadCambridge CB30ETUnited Kingdom

Belgica antarctica(Diptera:Chironomidae),a brachypterous midge endemicto the maritime Antarctic,was first described in *** more than a century of study,a vast amount of information has been compiled on the species(3750000 Google searchresults as of January 10,2021),encompassing its ecology and biology,life cycle and re-production,polytene chromosomes,physiology,biochemistry and,increasingly,***2014,***’s genome was sequenced,further boosting *** develop-mental stages can be cultured successfully in the *** together,this wealthof information allows the species to be viewed as a natural model organism for studies ofadaptation and function in extreme environments.

关键词： Belgica antarctica Chironomidae stress adaptation Antarctica

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

Engineering stable perovskite X-ray detectors

引用

Light(Science & Applications) 2022年第10期11卷 2276-2276页

作者： Kostiantyn Sakhatskyi Maksym V.kovalenko Institute of Inorganic Chemistry Department of Chemistry and Applied BiosciencesETH ZürichCH-8093 ZürichSwitzerland Laboratory for Thin Films and Photovoltaics Empa-Swiss Federal Laboratories for Materials Science and TechnologyCH-8600 DübendorfSwitzerland

Nature Photonics 16,575-581(2022) The past decade has seen the raise of hybrid organic-inorganic lead halide perovskites as highly potent semi-conductors for direct-conversion X-ray *** offering unmatched cost advantages owing to solution growth,and unique defect-tolerant,intrinsic semi-conductor characteristics,these materials suffer from reduced operational stability caused by ionic drift and lattice instability.

关键词： perovskite matched inorganic

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

铺粉厚度对选区激光熔化316L沉积层致密度与表面形貌的影响

引用

表面技术 2022年第3期51卷 286-295页

作者：张杰杨高林徐侠姚建华 Volodymyr kovalenko 浙江工业大学激光先进制造研究院杭州310023 浙江工业大学机械工程学院杭州310023 浙江工业大学高端激光制造装备省部共建协同创新中心杭州310023 奔腾激光(温州)有限公司浙江温州325000 乌克兰国立科技大学激光技术研究所乌克兰基辅03056

目的为了解决选区激光熔化增材再制造时出现的首层铺粉粉层厚度不均的问题,研究首层粉层厚度为400μm时选区激光熔化成形工艺。方法采用倾斜基板预置楔形粉层,在粉层上进行不同激光功率的激光扫描实验,研究楔形粉层对沉积的影响规律... 详细信息

目的为了解决选区激光熔化增材再制造时出现的首层铺粉粉层厚度不均的问题,研究首层粉层厚度为400μm时选区激光熔化成形工艺。方法采用倾斜基板预置楔形粉层,在粉层上进行不同激光功率的激光扫描实验,研究楔形粉层对沉积的影响规律。然后在水平放置的基板上分别预置50、100、200、300、400μm厚度粉层,在粉层上进行激光扫描实验,研究粉层厚度对沉积的影响规律。最后做首层400μm层厚,后续5层每层50μm的多层沉积实验,研究厚粉层对后续SLM成形的影响规律。结果在倾斜上表面采用选区激光熔化技术进行修复,铺粉厚度的增加会导致沉积层致密度变差且表面起伏增大。通过提高激光能量密度的方式,采用300 W、800 mm/s的工艺参数在400μm大层厚下激光扫描,可改善沉积层与基板的结合情况并减小沉积层上表面的起伏轮廓,同时该参数也能在小层厚时得到致密的沉积层。在首层400μm层厚的基础上进行SLM成形时,需用首层沉积的工艺沉积5层作为过渡区,后续可按正常的SLM成形工艺进行沉积。结论用SLM技术进行零件修复时,虽然首层会出现厚度不均的楔形粉层。当粉层最厚区域不超过400μm时,需提高激光功率密度进行沉积。在高功率密度参数下沉积5层后可以采用正常SLM工艺进行后续成形。

关键词：选区激光熔化修复沉积层致密度表面形貌

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Current Problems of the Diagnostics and Treatment of Sepsis and Burn Injuries: The Modified Pathogenetic Concept

引用

International Journal of Clinical Medicine 2023年第1期14卷 20-33页

作者： Olga kovalenko Lesia Ostapiuk Anatoliy Voloshinovskii Bohomolets National Medical University Kyiv Ukraine Pulmonary Health Centre Lviv Ukraine Ivan Franko National University Lviv Ukraine

Background: The deep understanding of pathogenesis is a key moment in the formation of the modern strategy of modern medicine. We conducted the thorough analysis of the microscopic processes occurring in the bodies of patients with purulent-septic complications. The modified pathogenetic concept of the diagnostic and treatment model of diseases with septic complications is presented. The obtained information about the mechanisms of origin and development of these diseases is fundamentally important for finding the modern effective methods of treating patients. The aim of the research is to modify treatment tactics for patients with sepsis and burn injuries based on the modified pathogenetic concept using modern diagnostics, i.e. the method of fluorescence spectroscopy (MFS) and biomarkers. Materials and Methods: The proposed modified pathogenetic concept of the diagnostic and treatment model of diseases with purulent-septic complications along with standard methods was used successfully for effective treatment of 15 patients with sepsis and 25 with burn injuries. Results: 3 main scenarios of behaviour of spectral-fluorescence characteristics of patients with sepsis are illustrated. Spectral-fluorescence markers of sepsis were studied, which are informative 24 to 48 hours before the appearance of obvious clinical and laboratory signs of significant changes in the general somatic status of patients. Conclusions: The proposed diagnostic and therapeutic approach is new and fundamentally important for diagnostics and monitoring of the process of treatment of patients with purulent-septic diseases and burn injuries. An in-depth understanding of the dynamics of septic complications and the corresponding changes of the main markers of these diseases during treatment is especially relevant. The use of infusion therapy with solutions of donor albumin as an effective pathogenetic treatment is scientifically justified.

关键词： Purulent-Inflammatory Diseases Sepsis Modified Pathogenetic Diagnostic and Treatment Model Method of Fluorescent Spectroscopy Biomarkers Albumin Infusion

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

316L表面激光熔覆复合等离子体电解氧化制备多孔陶瓷涂层及其生物应用

引用

Transactions of Nonferrous Metals Society of China 2022年第9期32卷 2993-3004页

作者：吴国龙张烁王晔孙敏张群莉 Volodymyr kovalenko 姚建华浙江工业大学机械工程学院杭州310014 浙江工业大学激光先进制造研究院杭州310014 浙江工业大学高端激光制造设备协同创新中心杭州310014 Laser Technology Research Institute National Technical University of Ukraine“Kiev Polytechnic Institute”Kiev03056Ukraine

为了提高316L不锈钢的生物活性,采用激光熔覆(LC)技术在316L不锈钢表面制备钛层,然后利用等离子体电解氧化(PEO)技术在钛层上形成多孔陶瓷涂层。采用三维表面轮廓仪、SEM、EDS、XRD和XPS等测试方法对涂层试样的形貌、微观结构和组成进... 详细信息

为了提高316L不锈钢的生物活性,采用激光熔覆(LC)技术在316L不锈钢表面制备钛层,然后利用等离子体电解氧化(PEO)技术在钛层上形成多孔陶瓷涂层。采用三维表面轮廓仪、SEM、EDS、XRD和XPS等测试方法对涂层试样的形貌、微观结构和组成进行表征。通过动电位极化曲线和模拟体液(SBF)浸泡试验,分别对涂层的耐腐蚀性和生物活性进行评价。结果表明,多孔陶瓷涂层主要由锐钛矿和金红石组成,并检测到高结晶HA。陶瓷涂层的主要元素为Ca、P、Ti和O。在模拟体液中,LC+PEO复合生物涂层比316L基质具有更优异的耐腐蚀性,并且复合涂层能有效提高316L不锈钢的生物活性。

关键词： 316L不锈钢激光熔覆钛等离子体电解氧化生物活性

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

激光辅助化学气相沉积研究进展

引用

光电工程 2022年第2期49卷 1-29页

作者：范丽莎刘帆吴国龙 Volodymyr S.kovalenko 姚建华浙江工业大学激光先进制造研究院浙江杭州310023 浙江工业大学机械工程学院浙江杭州310023 高端激光制造装备省部共建协同创新中心浙江杭州310023 乌克兰国立科技大学激光技术研究所乌克兰基辅03056

激光化学气相沉积技术(LCVD)相较于传统化学气相沉积技术具有低沉积温度、高膜层纯度、高沉积效率等特点,在各类功能薄膜材料制备上有着巨大的应用前景。围绕激光化学气相沉积技术,本文详细阐述了激光热解离、激光光解离与激光共振激发... 详细信息

激光化学气相沉积技术(LCVD)相较于传统化学气相沉积技术具有低沉积温度、高膜层纯度、高沉积效率等特点,在各类功能薄膜材料制备上有着巨大的应用前景。围绕激光化学气相沉积技术,本文详细阐述了激光热解离、激光光解离与激光共振激发解离作用机制,同时介绍了各类LCVD的常用设备,着重总结了LCVD在金属材料、碳基材料、氧化物材料以及半导体材料等各类材料制备应用上的最新研究进展,特别介绍了LCVD制备过程中常用的检测与分析方法,最后讨论了激光化学气相沉积技术目前所面临的挑战与机遇,并展望了该技术的发展前景。

关键词：激光化学气相沉积薄膜制备热解离光解离共振激发解离

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

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：