检索结果-南通市图书馆

Paleoenvironment evolution and organic matter enrichment mechanisms in the first member of the Qingshankou Formation,Songliao Basin,China

引用

Frontiers of Earth Science 2024年第2期18卷 364-383页

作者： Ying LI Min WANG Yu YAN Xin WANG Jinyou ZHANG Xuefeng BAI Yuchen ZHANG Jiaheng XUE Junsheng FEI Lianbin ZHANG Guojun WANG School of Geoscience China University of Petroleum(East China)Qingdao 266580China Shandong Provincial Key Laboratory of Deep Oil and Gas Qingdao 266580China Exploration and Development Research Institute of Daqing oilfield Co ltd. Daqing 163712China Exploration Division PetroChina Daqing Oilfield CompanyDaqing 163453China Department of Physics Xiamen University MalaysiaBandar Sunsuria 43900Malaysia

Organic matter is the basis for oil and gas generation,and the depositional environment controls its *** first member of the Qingshankou Formation(K_(2)qn^(1))in Songliao Basin has a thick organic-rich shale and so is an important target section for shale oil exploration and *** the Gulong Sag,shale samples from this unit were collected over the full length of the *** characterization of the environments of deposition(EOD)of K_(2)qn^(1)was improved by utilizing lithological characteristics,thin section observations,elemental compositions,and organic carbon *** with the normalization coefficients proposed in this paper,an organic matter correlation model was established to elucidate the factors that influence organic matter *** the bottom to the top of K2qn1,the lake depth gradually becomes shallower,the primary productivity first decreases and then increases,the reducing conditions become stronger and then weaker,the water salinity gradually decreases,the climate first becomes semi-humid and then warm and humid,and the input of terrigenous debris first decreases and then increases.A major marine transgression at the base of the K_(2)qn^(1)᾽s brought in nutrients to increase primary productivity,and the density-stratified reducing environment preserved and enriched organic *** primary productivity occurred during the middle of the deposition of the K_(2)qn^(1),while terrigenous input is *** matter is preserved in reduced deep lake environments,resulting in organic matter-rich black *** lake became shallower,and the salinity decreased in the upper part of K_(2)qn^(1).Benthic organisms rapidly multiplied,consuming large amounts of oxygen and destroying the previously depositional environment,resulting in a reducing environment disturbed by benthic organisms with poor preservation conditions and the lowest organic matter content.

关键词： major and trace elements paleoenvironment evolution OM enrichment mechanism lacustrine shale Songliao Basin Qingshankou Formation

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

Analysis of the Relationship between Mechanical Properties and Pore Structure of MSW Incineration Bottom Ash Fine Aggregate Concrete after Freeze-Thaw Cycles Based on the Gray Theory

引用

Journal of Renewable Materials 2023年第2期11卷 669-688页

作者： Peng Zhang Dongsheng Shi Ping Han Wenchao Jiang School of Civil Engineering Inner Mongolia University of TechnologyHohhot010000China Xingtai Construction group Co. Ltd.Hohhot010000China Inner Mongolia Electric Power(group)company Limited Mengdian Project Construction and Management Branch Hohhot010000China

The destruction of concrete building materials in severely cold regions of the north is more severely affected by freeze-thaw cycles,and the relationship between the mechanical properties and pore structure of concrete with fine aggregate from municipal solid waste(MSW)incineration bottom ash after freeze-thaw cycles is analyzed under the degree of freeze-thaw hazard *** this paper,the gray correlation method is used to calculate the correlation between the relative dynamic elastic modulus,compressive strength,and microscopic porosity parameters to speculate on the most important factors affecting their *** GM(1,1)model was established based on the compressive strength of the waste incineration ash aggregate concrete,the relative error between the simulated and actual values in the model was less than 5%,and the accuracy of the model was level 1,indicating that the GM(1,1)model can well reflect the change in the compressive strength of the MSW incineration bottom ash aggregate concrete during freeze-thaw *** the gray correlation method,the correlation between the relative dynamic elastic modulus,compressive strength,air content,specific surface area,pore spacing coefficient,and pore average chord length was calculated,and the pore spacing coefficient and pore average chord length were determined to be highly correlated with each *** determination can help analyze and infer the deterioration mechanism of concrete subject to freeze-thaw *** results can provide a theoretical basis for guiding the engineering practice of concrete with fine aggregates of household bottom ash in the northern cold region.

关键词： Municipal solid waste incineration bottom ash concrete gray system theory mechanical properties pore structure

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

Whole process prediction model of silicon steel strip on transverse thickness difference based on Takagi-Sugeno fuzzy network

引用

Journal of Iron and Steel Research International 2023年第12期30卷 2448-2458页

作者： Hai-nan He Zhuo-hao Dai Xiao-chen Wang Quan Yang Jian Shao Jing-dong Li Zhi-hong Zhang Liang Zhang National Engineering Technology Research Center of Flat Rolling Equipment University of Science and Technology BeijingBeijing100083China Handan Iron and Steel company of Hebei Iron and Steel group Co. Ltd.Handan056015HebeiChina

The hot rolling and cold rolling control models of silicon steel strip were *** control of silicon steel strip of hot rolling was a theoretical analysis model,and the shape control of cold rolling was a data-based prediction *** mathematical model of the hot-rolled silicon steel section,including the crown genetic model,inter-stand crown recovery model,and hot-rolled strip section prediction model,is used to control the shape of hot-rolled *** cold rolling shape control is mainly based on Takagi-Sugeno fuzzy network,which is used to simulate and predict the transverse thickness difference of cold-rolled silicon steel ***,a predictive model for the transverse thickness difference of silicon steel strips is developed to provide a new quality control method of transverse thickness of combined hot and cold rolling to improve the strip profile quality and increase economic *** qualified rate of the non-oriented silicon steel strip is finally obtained by applying this model,and it has been steadily upgraded to meet the needs of product quality and flexible production.

关键词： Hot rolling-Strip profile Transverse thickness difference Silicon steel.Takagi-Sugeno fuzzy network

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

Production and characterization of high porosity porous Fe?Cr?C alloys by the space holder leaching technique

引用

International Journal of Minerals,Metallurgy and Materials 2016年第7期23卷 793-798页

作者： Da-rong Tian Yu-hua Pang Liang Yu Li Sun School of Metallurgical Engineering Xi'an University of Architecture and TechnologyXi'an 710055China Research Center of Metallurgical Engineering and Technology of Shaanxi Province Xi'an 710055China AVIC Xi'an Aircraft Industry(group)company ltd. Xi'an 710000China

Spherical carbamide particles were employed to produce porous Fe–Cr–C alloy with high porosity and large aperture via the space-holder leaching technique. A series of porous samples were prepared by regulating the processing parameters, which included the carbamide content and the compaction pressure. The pore characteristics and compression properties of the produced samples were investigated. The samples were characterized by scanning electron microscopy, image analysis, and compression tests. The results showed that the macro-porosity and the mean pore size were in the ranges 40.4%–82.4% and 0.6–1.5 mm, respectively. The compressive strength varied between 25.38 MPa and 127.9 MPa, and was observed to decrease with increasing total porosity.

关键词： porous metal powder metallurgy cellular manufacturing porosity compressive strength

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

Innovative development path of ethnomedicines： an overview of ethnomedicines in China

引用

Frontiers of Medicine 2016年第2期10卷 166-177页

作者： Zhaoyun Zhu Ting Wang Dehuan Fu Yali Gui Jingkun Wang Tao Cui Yunnan Institute of Materia Medica Innovation and R & D Center of Yunnan Baiyao Group Co. Ltd. and Yunnan Province Company KeyLaboratory for New Drug Research and Development of TCM and Ethnomedicines Kunming 650111 China

In the long history of disease prevention and treatment, ancestral populations worldwide have gained knowledge and experiences in traditional medicines. For instance, ethnomedicines of Chinese ethnic minorities constitute an important part of traditional medicines. In our study, we firstly clarified the concept of ethnomedicines and the connotations of ethnopharmacology. The particularity of ethnomedicine research were then summed up, and the development profiles of the ethnomedicines of Chinese ethnic minorities were discussed by investigating the current status and existing problems. On this basis, we abstracted the innovative development path of ethnomedicines for the first time, which was found to follows：resource study -, standardized development research -~ industrialization of the achievements and efforts for internationalization. We found that platform establishment and team training are keys to achieving innovative development. Hence, this study provided a basis for ethnomedicine development.

关键词： traditional medicines ethnomedicines Chinese ethnic minorities ethnopharmacology research mode innovative development path

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

Shale Oil Occurrence and Reservoir Characteristics of the Qijia-Gulong Depression in Songliao Basin

引用

Acta Geologica Sinica(English Edition) 2015年第A1期89卷 151-153页

作者： HUO Qiuli ZENG Huasen ZHANG Xiaochang FANG Qinghua WANG Zhenying FU Li E&D Research Institute Daqing Oilfield Company Ltd.Co.

1 Introduction The technology breakthrough in the exploration of shale gas and tight oil has greatly extended the global fossil fuel resources （Jia et al., 2012; Zou et al., 2012; Qiu et al., 2013）. Although shale oil has been the global hot topic in the study of unconventional resources, there are varied definitions with respect to shale oil by different researchers.

关键词：

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

Enhancing the resolution of sparse rock property measurements using machine learning and random field theory

引用

Journal of Rock Mechanics and Geotechnical Engineering 2024年第10期16卷 3924-3936页

作者： Jiawei Xie Jinsong Huang Fuxiang Zhang Jixiang He Kaifeng Kang Yunqiang Sun Discipline of Civil Surveying and Environmental EngineeringPriority Research Centre for Geotechnical Science and EngineeringThe University of NewcastleCallaghanNSW2308Australia Intercontinental Strait Energy Technology Co. Ltd.BeijingChina Institute of Exploration and Development of Xinjiang oilfield company PetroChinaKaramayChina

The travel time of rock compressional waves is an essential parameter used for estimating important rock properties,such as porosity,permeability,and *** methods,like wireline logging tests,provide broad measurements but lack finer ***-based rock core measurements offer higher resolution but are ***,wireline logging and rock core measurements have been used *** study introduces a novel approach that integrates both data *** method leverages the detailed features from limited core data to enhance the resolution of wireline logging *** combining machine learning with random field theory,the method allows for probabilistic predictions in regions with sparse data *** this framework,12 parameters from wireline tests are used to predict trends in rock core *** residuals are modeled using random field *** outcomes are high-resolution predictions that combine both the predicted trend and the probabilistic realizations of the *** utilizing unconditional and conditional random field theories,this method enables unconditional and conditional simulations of the underlying high-resolution rock compressional wave travel time profile and provides uncertainty *** integrated approach optimizes the use of existing core and logging *** applicability is confirmed in an oil project in West China.

关键词： Wireline logs Core characterization Compressional wave travel time Machine learning Random field theory

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

A Developing dagang oilfields

引用

China Oil & Gas 1996年第4期3卷 253-253页

作者： $$$$Yao Heqing(Chairman and President of dagang oilfield group ltd. company) Chairman and President of dagang oilfield group ltd. company

ＡＤｅｖｅｌｏｐｉｎｇＤａｇａｎｇＯｉｌｆｉｅｌｄｓＹａｏＨｅｑｉｎｇ（ＣｈａｉｒｍａｎａｎｄＰｒｅｓｉｄｅｎｔｏｆＤａｇａｎｇＯｉｌｆｉｅｌｄＧｒｏｕｐＬｔｄ．Ｃｏｍｐａｎｙ）ＤａｇａｎｇＯｉｌｆｉｅｌｄＧｒｏｕｐ...

ＡＤｅｖｅｌｏｐｉｎｇＤａｇａｎｇＯｉｌｆｉｅｌｄｓＹａｏＨｅｑｉｎｇ（ＣｈａｉｒｍａｎａｎｄＰｒｅｓｉｄｅｎｔｏｆＤａｇａｎｇＯｉｌｆｉｅｌｄＧｒｏｕｐＬｔｄ．Ｃｏｍｐａｎｙ）ＤａｇａｎｇＯｉｌｆｉｅｌｄＧｒｏｕｐＬｔｄ．Ｃｏｍｐａｎｙ（Ｄａｇａｎ...

关键词：

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

Innovative development path of ethnomedicines： a case study

引用

Frontiers of Medicine 2017年第2期11卷 297-305页

作者： Zhaoyun Zhu Yali Gui Li Wang Ting Wang Yang Yang Yunzhuang Niu Dehuan Fu Jingkun Wang Tao Cui Yunnan Institute of Materia Medica Innovation and R & D Center of Yunnan Baiyao Group Co. Ltd. and Yunnan Province Company KeyLaboratory for New Drug Research and Development of TCM and Ethnomedicines Kunming 650111 China

Innovative development extends the vitality of ethnomedicines. Developing ethnomedicines is not only beneficial to the public but also to the related industry and transforms economic growth, driving local social and economic development further. Its economic benefit can be used to optimize and promote the hardware and software of the platform, as well as support the sustainable development of ethnomedicines. Apart from research and discussion on the innovative development of ethnomedicines on the basis of theory and regulations, this series of articles also summarizes cases that are conducive to the overall understanding of the necessity and feasibility of the innovative development. In terms of industrial development, large enterprises and products, such as Yunnan Baiyao, Guizhou Miao ethnomedicines, Cheezheng Tibetan Medicine, products developed from Dengzhanhua （Erigeron breviscapus）, the Gold series of Yi ethnomedicines, and products developed from Sanqi （Panax notoginseng）, in China are introduced and summarized, focusing on resource superiority, sustainable innovation, standard research and development, and production, as well as intellectual property protection.

关键词： ethnomedicine industry resource advantages continuous innovation standardized development research intellectual property protection

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

Effect of Heat Treatment on Gradient Microstructure and Tensile Property of Laser Powder Bed Fusion Fabricated 15-5 Precipitation Hardening Stainless Steel

引用

Acta Metallurgica Sinica(English Letters) 2024年第1期37卷 181-195页

作者： Sheng Cao Hongyu Liu Jin Jiang Ke He Binghua Lv Hao Zhang Lujie Zhang Jingrong Meng Hao Deng Xiaodong Niu Department of Mechanical Engineering College of EngineeringShantou UniversityShantou515063China China State Shipbuilding Co. Ltd.Huangpu Wenchong Shipbuilding Company Ltd.Guangzhou510715China Faculty of Materials and Manufacturing Beijing University of TechnologyBeijing100080China Shantou Ruixiang Mould Co. Ltd.Shantou515041China Military Representative Office X of Unit 93147 Deyang618000China China National Erzhong group Co. Deyang Wanhang Die Forging Co.Ltd.Deyang618013China

This work investigated the gradient microstructure evolution and tensile property of LPBF fabricated 15-5 precipitation hardening stainless steel in post-process direct ageing(DA)and solution treating&ageing(STA).The varied microstructures for austenite and small-sized oxide inclusions at different sample heights in the as-built(AB)condition was generally preserved after DA ***,austenite was almost disappeared,and oxide particle grew significantly after the STA *** a result,the tensile property differences in sample top and bottom for AB and DA conditions did not occur in the STA *** the influence of post-process heat treatment,the STA condition had the highest yield strength due to the highest volume fraction of nano-sized Cu ***,the DA specimen had the highest ultimate tensile strength and elongation owing to the considerable amount of austenite phase and associated transformation induced plasticity effect.

关键词： 15-5 PH stainless steel Laser powder bed fusion Heat treatment Gradient microstructures Tensile properties

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

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：