检索结果-南通市图书馆

Acoustic characterization of hydrate formation and decomposition in clay-bearing sediments

Petroleum Science 2024年第4期21卷 2830-2838页

作者： Yi-Jian Zhu Xiao-Mei Yang Xing Huang Hao Li Xiao-Hui Wang Yi-Fei Sun Peng Xiao chang-Yu Sun guang-Jin Chen State Key Laboratory of Heavy Oil Processing College of Chemical Engineering and Environment China University of Petroleum

Understanding the acoustic characteristics of hydrates in various sediments is crucial for hydrate resource detection and safe and efficient exploitation, as hydrate occurrence patterns vary greatly in different sediments. In this work, sediments with different bentonite contents, water saturations, and types were prepared to investigate the characteristics of P-wave velocity(reflecting the magnitude of hydrate saturation in the sediment) and amplitude(reflecting the degree of hydrate-sediment cementation) during hydrate formation and depressurization. During hydrate formation, the P-wave velocity and amplitude have similar trends. As clay content increases, the P-wave velocity increase rates quickened. On the other hand, the increased rate of P-wave velocity slows down with the increase of water saturation in the clay-bearing sediments. Comparing various types of sediment shows that the water absorption and swelling of bentonite reduce the pore space, speeding up the cementation of the hydrate with the sediment and increasing P-wave velocity at a faster rate. Correspondence between P-wave velocity and hydrate saturation is strongly related to sediment type, clay content, and water *** rapidly decreasing amplitude in the early stage of hydrate depressurization indicates that hydrate in clay-bearing sediments is weakly cemented to the sediments, which is prone to stratigraphic *** findings of this study offer guidance for hydrate resource assessments in clay-bearing sediments as well as geologic risk estimations during hydrate mining.

关键词： gas hydrate bentonite illite P-wave velocity amplitude

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

Lithiophilic CoF_(2)@C hollow spheres towards spatial lithium deposition for stable lithium metal batteries

引用

Journal of Energy Chemistry 2024年第10期97卷 55-67,I0002页

作者： Jianxing Wang shuhao Yao Runming Tao Xiaolang Liu Jiazhi Geng chang Hong Huiying Li Guiyun Yu Haifeng Li Xiao-guang Sun Jianlin Li Jiyuan Liang School of Optoelectronic Materials&Technology jianghan UniversityWuhan 430056HubeiChina Institute for Advanced Materials and Manufacturing University of TennesseeKnoxilTN 37996USA School of Chemistry&Chemical Engineering Yancheng Institute of TechnologyYancheng 224051JiangsuChina Chemical Sciences Division Oak Ridge National LaboratoryOak RidgeTN 37831USA Applied Materials Division Argonne National LaboratoryLemontIL 60439USA

Lithium metal(LM)is a promising anode for next-generation batteries due to its high theoretical capacity and low electrode ***,side reactions,volume change,and unwanted lithium dendrite growth seriously limit the practical application of ***,with the aid of a hard template approach,a novel lithiophilic CoF_(2)-carbon hollow sphere(CoF_(2)@C-HS)composite material is successfully prepared via a facile in-situ fluorination and etching *** lithiophilic CoF_(2) acts as nucleation sites to reduce nucleation overpotential as well as induces the spatial Li deposition and the formation of LiFrich solid electrolyte interphase(SEI),and the hollow carbon matrix can enhance the electrical conductivity and offer free space for LM *** simulations reveal that the synergistic effect of lithiophilic CoF_(2) and hollow carbon matrix homogenizes the electric field distribution and Li~+*** from these advantages,the CoF_(2)@C-HS-modified copper substrate electrode delivers an enhanced Coulombic efficiency(CE)of 93.7%for 280 cycles at 1 mA cm^(-2)and 1 mA h cm^(-2).The symmetrical cell using CoF_(2)@C-HS can stably cycle more than 1800 h with a low voltage hysteresis of 11 mV at a current density of 0.5 MA cm^(-2)and an areal capacity of 0.5 mA h cm^(-2).Moreover,the Li@CoF_(2)@C-HS composite anode enables more than 300 stable cycles at 1 C with a capacity retention of 95%in LiFePO_(4)-based full cell and 110 stable cycles at 1 C in LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)-based highvoltage full *** work might shed a new light on designing lithiophilic hosts to spatially confine LM deposition,realizing dendrite-free LM anodes and the practical applications of LM batteries.

关键词： Lithium metal anode Spatial deposition Stability Nanocomposite Lithiophilic CoF_(2)

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

供应链库存管理中缺货补偿问题的研究

引用

工业工程与管理 2005年第2期10卷 31-33,38页

作者：常广庶西北工业大学管理学院

在供应链库存管理中,往往都是由客户承担缺货所带来的各种损失。针对这种情况,本文提出供应商在缺货时应向客户提供一定比例的补偿,以维持与客户的合作关系,实现双赢的目的,并利用非线性规划的原理,建立了供应商的缺货补偿模型,最后给... 详细信息

在供应链库存管理中,往往都是由客户承担缺货所带来的各种损失。针对这种情况,本文提出供应商在缺货时应向客户提供一定比例的补偿,以维持与客户的合作关系,实现双赢的目的,并利用非线性规划的原理,建立了供应商的缺货补偿模型,最后给出了订货量的最优解,并以实例验证了所给模型和算法的有效性。

关键词：供应链库存管理缺货

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

当前大学生就业难的根源及对策

引用

郑州航空工业管理学院学报 2009年第6期27卷 60-63页

作者：常广庶郑州航空工业管理学院河南郑州450015

当前,大学毕业生的就业难问题已引起各级政府的空前重视和社会各界的普遍关注。文章分析了大学毕业生就业难的现状,探讨了大学生就业难的根源所在,指出了大学毕业生就业面临的机遇,进而提出了促进大学毕业生就业的一些基本途径。

关键词：大学毕业生就业职业生涯规划

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

世界电子商务发展形势及我国应对策略

引用

郑州航空工业管理学院学报（社会科学版） 2001年第2期20卷 36-39页

作者：常广庶郑州航空工业管理学院郑州450005

本文论述了世界电子商务的最新发展趋势及我国电子商务发展所取得的进展和存在的问题，并

关键词：互联网电子商务发展对策

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

供应链采购限制下的库存策略研究

引用

组合机床与自动化加工技术 2005年第3期 94-95,98页

作者：常广庶郑州航空工业管理学院郑州450015

库存是影响供应链成本性能的主要因素之一 ,有效地减少库存可以降低整个供应链的成本性能 ,因此库存管理是优化供应链运作、提高竞争优势的重要手段。论文针对库存管理中的 (s ,S)策略 ,建立了库存水平变化的模型 ,分别分析了无采购条... 详细信息

库存是影响供应链成本性能的主要因素之一 ,有效地减少库存可以降低整个供应链的成本性能 ,因此库存管理是优化供应链运作、提高竞争优势的重要手段。论文针对库存管理中的 (s ,S)策略 ,建立了库存水平变化的模型 ,分别分析了无采购条件限制和有采购条件限制下的库存水平的变化 ,并分别给出了其期望值和方差。

关键词：供应链库存管理 (s,S)策略

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

Stimulated Brillouin interaction between guided phonons and photons in a lithium niobate waveguide

引用

Science China(Physics,Mechanics & Astronomy) 2024年第1期67卷 173-175页

作者： Yuan-Hao Yang Jia-Qi Wang Zheng-Xu Zhu Xin-Biao Xu Qiang Zhang Juanjuan Lu Yu Zeng Chun-Hua Dong Luyan Sun guang-Can Guo chang-Ling Zou CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-ElectronicsShanxi UniversityTaiyuan 030006China School of Information Science and Technology ShanghaiTech UniversityShanghai 201210China Center for Quantum Information Institute for Interdisciplinary Information SciencesTsinghua UniversityBeijing 100084China

The Brillouin scattering is one of the strongest nonlinear optical effects in dielectrics[1].In particular,the backward Brillouin scattering(BBS)provides an efficient method to achieve low-noise optical gain for active photonics[2]and the coherent interconnects between 10 GHz phonons and photons[3].However,previous studies on BBS are primarily limited to the unconfined phonons[1]or phonon confined in suspended structures[4-6].

关键词： scattering waveguide Brillouin

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 contradictory phenomenon of thicken pericardium and cardiac compression without inferior vena cava dilation:sign of IVC escape

引用

Journal of Geriatric Cardiology 2024年第5期21卷 583-587页

作者： Tie-Nan CHEN shuang ZHAO shuai QIAO Yong-Yong HAN Qing LIU chang-Le LIU guang-Ping LI Tong LIU Hua-Ying FU Department of Cardiovascular Surgery Second Hospital of Tianjin Medical UniversityTianjinChina Department of Cardiology Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular DiseaseTianjin Institute of Cardi-ologyThe Second Hospital of Tianjin Medical UniversityTianjinChina Department of Oncology Second Hospital of Tianjin Medical UniversityTianjinPeople's Republic of China

A 77-year-old female presented with shortness of breath and tightness of chest was *** past medical history included hypertension and she has been taking nifedipine *** years before,she was diagnosed with pericardial effusion(Figure 1)and had pericardiocentesis *** physical examination,her blood pressure was 151/100 mm-Hg and her pulse rate was 91 beats/min.

关键词： admitted cardiac thick

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

Polarity-controllable magnetic skyrmion filter

引用

Chinese Physics B 2024年第10期33卷 400-404页

作者： Xiao-Lin Ai Hui-Ting Li Xue-Feng Zhang chang-Feng Li Je-Ho Shim Xiao-Ping Ma Hong-guang Piao Hubei Engineering Research Center of Weak Magnetic-Field Detection College of ScienceChina Three Gorges UniversityYichang 443002China Department of Physics College of ScienceYanbian UniversityYanji 133002China

The skyrmion generator is one of the indispensable components for the future functional skyrmion devices,but the process of generating skyrmion cannot avoid mixing with other magnetic textures,such as skyrmionium and nested skyrmion *** mixed magnetic textures will inevitably lead to the blockage of skyrmion transport and even the distortion of data ***,the design of an efficient skyrmion filter is of great significance for the development of skyrmion-based spintronic *** this work,a skyrmion filter scheme is proposed,and the high-efficiency filtering function is demonstrated by micromagnetic *** results show that the filtering effect of the scheme depends on the structure geometry and the spin current density that drives the *** on this scheme,the polarity of the filtered skyrmion can be controlled by switching the magnetization state at the output end,and the“cloning”of the skyrmion can be realized by geometric optimization of the *** believe that in the near future,the skyrmion filter will become one of the important components of skyrmion-based spintronic devices in the future.

关键词： spintronics skyrmions skyrmion filter skyrmion polarity skyrmion clone

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

Effect of drying methods on perovskite films and solar cells

引用

Journal of Semiconductors 2024年第1期45卷 1-5页

作者： Ling Liu Chuantian Zuo guang-Xing Liang Hua Dong Jingjing chang Liming Ding Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China Key Laboratory of Semiconductor Materials Science Beijing Key Laboratory of Low Dimensional Semiconductor Materials and DeviceIsnstitute of SemiconductorsChinese Academy of SciencesBeijing 100083China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China School of Electronic and Information Engineering Xi’an Jiaotong UniversityXi’an 710049China Academy of Advanced Interdisciplinary Research Xidian UniversityXi’an 710126China

The high efficiency,solution processibility,and flexibility of perovskite solar cells make them promising candidates for the photovoltaic industry[1−8].The deposition method is one of the most critical factors that affect the performance of perovskite *** deposition methods have been developed to make perovskite films,including spin-coating,slotdie coating.

关键词： perovskite films critical

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：