检索结果-内蒙古大学图书馆

Carbon sequestration in overlying methane hydrate layers via hydrate technology: Feasibility and synergistic benefits

引用

ENVIRONMENTAL TECHNOLOGY & INNOVATION 2025年 37卷

作者： Zhang, Zhaobin li, Yuxuan li, Shouding He, Jianming Xie, Zhuoran li, Xiao Lu, Cheng Qin, xuwen Chinese Acad Sci Inst Geol & Geophys Key Lab Deep Petr Intelligent Explorat & Dev Beijing 100029 Peoples R China Chinese Acad Sci Innovat Acad Earth Sci Beijing 100029 Peoples R China Univ Chinese Acad Sci Coll Earth & Planetary Sci Beijing 100049 Peoples R China China Geol Survey Minist Nat Resources Oil & Gas Resources Survey Beijing 100083 Peoples R China China Geol Survey Minist Nat Resources Beijing 100037 Peoples R China

Excessive carbon dioxide emissions pose a global environmental issue, and carbon sequestration technology offers a solution. This study based on independently developed simulator proposes a novel approach for carbon dioxide sequestration in the overlying layers of methane hydrate reservoirs using carbon dioxide hydrate technology. The feasibility and risks of this method are evaluated over a time scale of 100,000 years. Results show that carbon dioxide migrates upwards after injection, forming highly saturated hydrate shells at the migration front. Within these carbon dioxide hydrate shells, a portion of the carbon dioxide is sequestered in liquid and dissolved forms;however, over tens of thousands of years, 20% of the COQ will dissolve, while less than 1% will escape. The study highlights the synergy between methane hydrate extraction and carbon sequestration, as the cold seawater down draw effect from extraction enhances sequestration efficiency and safety. Given the widespread distribution of methane hydrate reservoirs globally, this research provides new insights into carbon sequestration technology.

关键词： Carbon dioxide sequestration Hydrate Carbon dioxide hydrate shells Carbon dioxide escapes Methane hydrate extraction

来源：评论

学校读者我要写书评

暂无评论

Decoding the bitter taste of Idesia polycarpa var. vestita Diels fruit: Bitterness contribution and mechanisms

引用

FOOD CHEMISTRY 2024年第Part2期460卷 140609页

作者： Xiang, xuwen Chen, Kewei li, Aijun Yang, Gang An, Xiaofeng Kan, Jianquan Southwest Univ Coll Food Sci 2 Tiansheng Rd Chongqing 400715 Peoples R China Minist Agr & Rural Affairs Peoples Republ China Lab Qual & Safety Risk Assessment Agroprod Storage Chongqing 400715 Peoples R China Chinese Hungarian Cooperat Res Ctr Food Sci Chongqing 400715 Peoples R China Chongqing Key Lab Special Food Cobuilt Sichuan & C Chongqing 400715 Peoples R China Chongqing Shanlinyuan Forestry Comprehens Dev Co L Chongqing 400800 Peoples R China

To comprehensively explore the contribution and mechanisms of identified low-threshold bitter substances in Idesia polycarpa var. vestita Diels (I. vestita) fruit, we performed quantification and elucidated their interactions with main bitter taste receptors through molecular docking. The established method for quantifying bitter compounds in I. vestita fruit was validated, yielding satisfactory parameters for linearity, stability, and accuracy. Idescarpin (17.71-101.05 mg/g) and idesin (7.88-77.14 mg/g) were the predominant bitter compounds in terms of content. Taste activity values (TAVs) exceeded 10 for the bitter substances, affirming their pivotal role as major contributors to overall bitterness of I. vestita fruit. Notably, idescarpin with the highest TAV, played a crucial role in generating the bitterness of I. vestita fruit. Hydrogen bonds and hydrophobic interactions were the main driving forces. This study holds potential implications for industrial development of I. vestita fruit by providing novel insights into the mechanism underlying its bitterness formation.

关键词： Idesia polycarpa var. vestita Diels Bitterness contribution Quantitative analysis Molecular docking Bitterness mechanism Taste activity value

来源：评论

学校读者我要写书评

暂无评论

骨折顺势复位法结合微创接骨板技术对累及关节面跟骨骨折近期疗效

引用

青岛大学学报（医学版） 2022年第1期58卷 46-50页

作者：李勇阵刘国明钱源陈峰李绪文季爱玉青岛大学附属医院创伤外科山东青岛266071

目的探讨应用骨折顺势复位法结合微创接骨板技术(MIPO)治疗累及关节面跟骨骨折的近期效果。方法对12例(14侧)累及关节面的跟骨骨折应用骨折顺势复位法结合克氏针撬拨,恢复距下关节面平整及跟骨长度、宽度、高度和Bohler角、Gisane角;选... 详细信息

目的探讨应用骨折顺势复位法结合微创接骨板技术(MIPO)治疗累及关节面跟骨骨折的近期效果。方法对12例(14侧)累及关节面的跟骨骨折应用骨折顺势复位法结合克氏针撬拨,恢复距下关节面平整及跟骨长度、宽度、高度和Bohler角、Gisane角;选择纵向微创切口,采用MIPO技术放置解剖钢板固定骨折。结果12例(14侧)病人术后无切口感染、坏死等并发症出现。术后24 h跟骨长度、跟骨高度、Bohler角、Gisane角明显高于术前,跟骨宽度低于术前,差异有统计学意义(t=12.552~17.011,Z=3.296、3.538,P<0.05)。术后6个月随访,AOFAS踝-后足评分优4侧,良8侧,可2侧。结论运用骨折顺势复位法结合MIPO技术治疗累及关节面跟骨骨折近期效果满意。

关键词：跟骨骨折骨折固定术微创接骨板技术

来源：评论

学校读者我要写书评

暂无评论

Comprehensive feasibility analysis of carbon dioxide hydrate sequestration: A numerical study based on horizontal well networks

引用

ENVIRONMENTAL TECHNOLOGY & INNOVATION 2025年 37卷

作者： li, Yuxuan Zhang, Zhaobin li, Shouding He, Jianming Xie, Zhuoran li, Xiao Lu, Cheng Qin, xuwen Chinese Acad Sci Inst Geol & Geophys State Key Lab Deep Petr Intelligent Explorat & Dev Beijing 100029 Peoples R China Univ Chinese Acad Sci Coll Earth & Planetary Sci Beijing 100049 Peoples R China Minist Nat Resources China Geol Survey Beijing 100037 Peoples R China

Carbon dioxide sequestration is a crucial strategy for achieving carbon neutrality. This study explores a novel approach to carbon dioxide storage in marine environments in the form of hydrate, addressing the stringent site requirements of traditional geological storage methods. Using a custom-developed simulator, a conceptual model for carbon dioxide sequestration in subsea reservoirs under a horizontal well network configuration was constructed. Key factors, including seawater depth, injection depth, and well spacing, were analyzed through simulations to quantify carbon dioxide storage capacity and assess associated risks under various sequestration scenarios. The results indicate that increasing seawater depth boosts both COQ storage capacity and safety, while deeper injection enhances safety but reduces hydrate storage capacity and raises leakage potential. Closer well spacing improves early-stage safety but increases long-term risks. The study outlines distinct sequestration stages and provides detailed analyses of COQ migration and phase transformations over time, contributing insights for advancing COQ sequestration strategies.

关键词： Carbon dioxide sequestration Hydrate Horizontal well network Seawater depth Injection depth Well spacing

来源：评论

学校读者我要写书评

暂无评论

生物医学工程国际化人才培养的需求与探索——以北京工业大学为例

引用

北京生物医学工程 2022年第2期41卷 190-193页

作者：郝冬梅杨琳李旭雯杨益民张松北京工业大学环境与生命学部北京100124 智能化生理测量与临床转化北京市国际科技合作基地北京100124

生物医学工程国际化人才培养对于我国医疗健康产业的发展具有重要意义。论文通过系统分析国际化教育的国内外研究现状,针对生物医学工程领域的科研和产业的需求,从办学方式、培养目标、课程设置和国际化举措方面探索了生物医学工程国际... 详细信息

生物医学工程国际化人才培养对于我国医疗健康产业的发展具有重要意义。论文通过系统分析国际化教育的国内外研究现状,针对生物医学工程领域的科研和产业的需求,从办学方式、培养目标、课程设置和国际化举措方面探索了生物医学工程国际化人才培养模式,并得到一些有益的结果。激励学生具有国际化视野、全球思维,能够与世界各国专业人士合作,解决人类共同面临的健康问题。

关键词：生物医学工程国际化人才培养医疗器械

来源：评论

学校读者我要写书评

暂无评论

Optimizing fracturing techniques for enhanced hydrate dissociation in low-permeability reservoirs: Insights from numerical simulation

GAS SCIENCE AND ENGINEERING

引用

GAS SCIENCE AND ENGINEERING 2024年 125卷

作者： Zhang, Zhaobin Xu, Tao li, Shouding He, Jianming li, Xiao li, Yuxuan Lu, Cheng Qin, xuwen Chinese Acad Sci Key Lab Shale Gas & Geoengn Inst Geol & Geophys Beijing 100029 Peoples R China Chinese Acad Sci Innovat Acad Earth Sci Beijing 100029 Peoples R China Univ Chinese Acad Sci Coll Earth & Planetary Sci Beijing 100049 Peoples R China Minist Nat Resources China Geol Survey Oil & Gas Resources Survey Beijing 100083 Peoples R China Minist Nat Resources China Geol Survey Guangzhou Marine Geol Survey Guangzhou 510075 Peoples R China

Natural gas hydrate represents an environmentally friendly alternative energy. However, the low-permeability hydrate reservoirs pose significant challenges to commercial production. To optimize hydrate production, reservoir stimulation methods like hydraulic fracturing, gas fracturing, and explosive fracturing are potential. In the investigation of the fracturing effect on hydrate dissociation behavior, we developed a three-dimensional model that comprehensively incorporates the arrangement of fracture planes, encompassing fracture permeability, spacing, and height. The model was implemented using a self-developed hydrate simulator which was validated at multiple scales. We firstly conducted a comparative analysis, contrasting the conventional depressurization method in horizontal wells with a combined depressurization and fracturing method. The comparison suggested that fracturing brings significant promotion (113.5%) on hydrate dissociation. Sensitivity analysis revealed fracture permeability and fracture height evidently exhibit an optimal value that facilitates the dissociation behavior. The optimal value of fracture permeability is dependent on the geological background. The optimal value of fracture height occurs just before penetrating the hydrate-bearing sediment layer and the overlying/underlying formations, i.e., near the thickness of the hydrate-bearing sediment layer. The impact of spacing on gas volume is limited while decreasing the spacing leads to more evident localized dissociation and differential subsidence of hydrate reservoir. It is necessary to balance production and geological risks when selecting the fracture spacing. The conclusions suggest that the fracturing operation need to be optimized by controlling the injection rate and the fracturing interval. It is not advisable to blindly pursue the effectiveness of reservoir stimulation but rather to consider the geological conditions. Additionally, we have found that it is preferable to establis

关键词： Numerical simulation Hydrate Fracturing Sensitivity analysis

来源：评论

学校读者我要写书评

暂无评论

Effect of Carburized Layer Depth on the Wear Reliability of Cams

引用

INTERNATIONAL JOURNAL OF AUTOMOTIVE TECHNOLOGY 2025年第3期26卷 799-812页

作者： Tang, Jie Chen, Jianzhi Shang, Fanmin Jing, xuwen Zhou, Honggen li, Guochao Jiangsu Univ Sci & Technol Sch Mech Engn Zhenjiang 212003 Peoples R China Jiangsu Univ Sci & Technol Sch Mat Sci & Engn Zhenjiang 212003 Peoples R China

The carburizing process is the key technology to improve the wear properties of cams;however, the influence mechanisms of the carburized depth on the wear reliability of cams are still unclear. In this work, the multi-body dynamic simulation with the AVL_EXCITE TD software and the accelerated wear experiments of the cam-roller pairs were combined to analyze the wear reliability of cams with different carburized depths of 0 mm, 0.8 mm and 1.4 mm. The results indicate that allowable wear depth of the cam is predicted to be 0.916 mm according to the degradation rule of the valve fullness coefficient. The maximum wear failure life of different carburized cams corresponding to the wear reliability of 99% was determined to be 1.0 x 107 cycles, 3.2 x 109 cycles and 3.5 x 109 cycles based on the combination of online detection data and the multi-body dynamics simulation. The relationship model between the wear failure life of the carburized cams and the carburized depth is established, and the optimal carburized layer depth of 1.20 mm is speculated from the model. The present work can provide new clues for improving the wear resistance of mechanical components.

关键词： Carburized layer depth Wear reliability Simulation Accelerated wear experiments Cam

来源：评论

学校读者我要写书评

暂无评论

64层螺旋CT冠状动脉血管造影“一站式”二尖瓣环收缩期运动参数测量对左心室收缩功能不全的诊断价值

引用

实用医学影像杂志 2021年第5期22卷 452-455页

作者：李旭文杜秀娟王夕富上海市松江区泗泾医院放射科 201600 上海市松江区泗泾医院心内科 201600 上海交通大学附属第一人民医院放射科

目的研究二尖瓣环收缩期运动相关参数[二尖瓣环平面收缩期位移(MAPSE)、二尖瓣环平面收缩期移动速度(MAPSMV)、左心室长轴应变(LAS)]与左心室收缩功能的关系,评估64层螺旋CT冠状动脉血管造影“一站式”二尖瓣环收缩期运动相关参数测量... 详细信息

目的研究二尖瓣环收缩期运动相关参数[二尖瓣环平面收缩期位移(MAPSE)、二尖瓣环平面收缩期移动速度(MAPSMV)、左心室长轴应变(LAS)]与左心室收缩功能的关系,评估64层螺旋CT冠状动脉血管造影“一站式”二尖瓣环收缩期运动相关参数测量对于左心室收缩功能不全的临床诊断价值。方法采用64层螺旋CT回顾性心电门控扫描技术对纳入研究的对照组(23名健康志愿者)、研究组(23例EF≥50%的左心室收缩功能不全患者)进行冠状动脉CTA检查,基于所获冠状动脉CTA图像数据测量2组二尖瓣环收缩期运动相关参数及左心室射血分数(LVEF),对2组间二尖瓣环收缩期运动相关参数及LVEF进行对比分析。结果研究组LVEF略低于对照组,二者间差异无统计学意义(t=1.42,P=0.16);研究组二尖瓣环收缩期位移(MAPSE)、二尖瓣环收缩期位移指数(MAPSEI)、二尖瓣环平面收缩期移动速度(MAPSMV)、二尖瓣环平面收缩期移动速度指数(MAPSMVI)、右心室长轴应变(LAS)参数低于对照组,2组间差异有统计学意义(P<0.05);MAPSE、MAPSEI、MAPSMV、MAPSMVI、LAS诊断EF≥50%左心室收缩功能不全的受试者工作特征曲线(ROC)曲线下面积分别为0.835、0.773、0.767、0.698、0.721,整体诊断准确性处于中到低水平。结论基于64层螺旋CT冠状动脉CTA的“一站式”二尖瓣环收缩期运动相关参数测量具有操作简单、重复性好的优点,可以在未额外增加X线辐射剂量及造影剂剂量前提下使受检者同时获得冠状动脉血管及左心室收缩功能相关信息,可以为诊断EF值尚处于正常范围的左心室收缩功能不全患者提供客观依据,在血管相关性射血分数保留型心力衰竭的诊断方面具有乐观的临床应用前景。

关键词：二尖瓣环平面收缩期位移左心室长轴应变二尖瓣环平面收缩期移动速度左心室收缩功能不全冠状动脉CTA 一站式

来源：评论

学校读者我要写书评

暂无评论

Comparative Evaluation of Thermal Stimulation Techniques for Natural Gas Hydrate Production

引用

ENERGY & FUELS 2024年第18期38卷 17674-17686页

作者： Zhang, Zhaobin li, Yuxuan li, Shouding He, Jianming Xie, Zhuoran li, Xiao Lu, Cheng Qin, xuwen Chinese Acad Sci Key Lab Shale Gas & Geoengn Inst Geol & Geophys Beijing 100029 Peoples R China Chinese Acad Sci Innovat Acad Earth Sci Beijing 100029 Peoples R China Univ Chinese Acad Sci Coll Earth & Planetary Sci Beijing 100049 Peoples R China China Geol Survey Minist Nat Resources Oil & Gas Resources Survey Beijing 100083 Peoples R China China Geol Survey Minist Nat Resources Beijing 100037 Peoples R China

The issue of thermal loss during the depressurization extraction of natural gas hydrates has long been a significant challenge for achieving long-term stable production. In the context of thermal stimulation extraction, researchers have proposed four injection methods: hot water injection, steam injection, wellbore electric heating, and low-frequency electric heating, and have conducted relevant studies. However, a comprehensive evaluation comparing the advantages and disadvantages of these four thermal stimulation extraction methods is still lacking. This research, using a self-developed hydrate numerical simulator, constructed extraction class III hydrate deposits models for the four injection methods and conducted long-term extraction simulations over a period of five years. The results indicate that low-frequency electric heating significantly enhances extraction efficiency under various permeability reservoir conditions. Its ability to achieve a large heating range and provide wellbore protection confers distinct advantages. In contrast, the hot water injection method imposes stringent requirements on reservoir permeability. Both steam injection and wellbore electric heating exhibit notable similarities in multiple physical fields and fluid production outcomes. This study offers valuable insights and reference points for the selection of thermal stimulation methods in future hydrate extraction engineering.

关键词： Hydrates

来源：评论

学校读者我要写书评

暂无评论

A new species of the genus lindaspio Blake & Maciolek, 1992 (Annelida, Spionidae) from a cold seep near Hainan Island, China

引用

ZOOKEYS 2023年第1153期1153卷 105-112页

作者： Sui, Jixing Dong, Dong Wu, xuwen li, Xinzheng Chinese Acad Sci Inst Oceanol Lab Marine Organism Taxon & Phylogeny Qingdao Key Lab Marine Biodivers & Conservat Qingdao 266071 Peoples R China Pilot Natl Lab Marine Sci & Technol Qingdao Lab Marine Biol & Biotechnol Qingdao Peoples R China Univ Chinese Acad Sci Beijing Peoples R China

A new species of the spionid genus lindaspio Blake & Maciolek, 1992 was collected from a cold seep near the Hainan Island at a depth of 1758 m. Morphologically, lindaspio polybranchiata sp. nov. differs from the congeners in having a narrow, folded caruncle and more neuropodial branchiae (from chaetiger 20). The 18S, COI, and 16S sequences of the new species have been submitted to GenBank. It is the first record of the genus lindaspio from Chinese waters. A key to all species of lindaspio is given.

关键词： Cold seep lindaspio polybranchiata sp nov Polychaeta taxonomy

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：