检索结果-南通市图书馆

The Modeling of Grain Surface Chemistry

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Physics 2020年第1期33卷 79-84页

作者： long-fei chen Fang-fang Li Qiang Chang Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China School of Physics and Optoelectronic Engineering Shandong University of TechnologyZibo 255000China

Astrochemistry has made great progress in recent *** the grain surface chemistry played important roles in the explanation of the formation of the interstellar *** this review,we will discuss the progress,including the di erent numerical methods to simulate the ice mantles in the astrochemical *** will also introduce the laboratory astrochemical experimental results,and their contributions to the grain surface chemistry in the review.

关键词： Astrochemistry Molecules Surface chemistry Solid-state

Correction to:Effect of Process Parameters on Defects,Melt Pool Shape,Microstructure,and Tensile Behavior of 316L Stainless Steel Produced by Selective Laser Melting

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2021年第4期34卷 511-513页

作者： Hua-Zhen Jiang Zheng-Yang Li Tao Feng Peng-Yue Wu Qi-Sheng chen Yun-long Feng long-fei chen Jing-Yu Hou He-Jian Xu School of Engineering Science University of Chinese Academy of SciencesBeijing100190China Institute of Mechanics Chinese Academy of SciencesBeijing100190China Beijing E-Plus-3D Technology Co. LTDBeijing102299China

In the Original Publication of the article,some reference numbers in the Figs.1,5,14 and Appendixes B,C,D are *** corrected reference numbers in the figures and appendixes are given below.

关键词： Microstructure Defects 316L

VLP:A Survey on Vision-language Pre-training

在线全文

学校读者我要写书评

暂无评论

Machine Intelligence Research 2023年第1期20卷 38-56页

作者： fei-long chen Du-Zhen Zhang Ming-Lun Han Xiu-Yi chen Jing Shi Shuang Xu Bo Xu Institute of Automation Chinese Academy of SciencesBeijing 100190China School of Future Technology University of Chinese Academy of SciencesBeijing 100049China School of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100049China

In the past few years,the emergence of pre-training models has brought uni-modal fields such as computer vision(CV)and natural language processing(NLP)to a new *** works have shown that they are beneficial for downstream uni-modal tasks and avoid training a new model from *** can such pre-trained models be applied to multi-modal tasks?Researchers have ex-plored this problem and made significant *** paper surveys recent advances and new frontiers in vision-language pre-training(VLP),including image-text and video-text *** give readers a better overall grasp of VLP,we first review its recent ad-vances in five aspects:feature extraction,model architecture,pre-training objectives,pre-training datasets,and downstream ***,we summarize the specific VLP models in ***,we discuss the new frontiers in *** the best of our knowledge,this is the first survey focused on *** hope that this survey can shed light on future research in the VLP field.

关键词： Vision and language pre-training transformers multimodal learning representation learning

Sustainable Mining in the Era of Artificial Intelligence

在线全文

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2024年第1期11卷 1-4页

作者： long chen Yuting Xie Yutong Wang Shirong Ge fei-Yue Wang IEEE the State Key Laboratory for Management and Control of Complex Systems at the Institute of Automation Chinese Academy of SciencesBeijing 100190China the National Laboratory of Pattern Recognition at the Institute of Automation and Waytous Ltd.China the School of Computer Science and Engineering Sun Yat-Sen UniversityGuangzhou 510275GuangdongChina the School of Mechanical Electronic and Information Engineering China University of Mining and Technology BeijingBejing 100083China the School of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100190China

The mining sector historically drove the global economy but at the expense of severe environmental and health repercussions,posing sustainability challenges[1]-[3].Recent advancements on artificial intelligence(AI)are revolutionizing mining through robotic and data-driven innovations[4]-[7].While AI offers mining industry advantages,it is crucial to acknowledge the potential risks associated with its widespread ***-reliance on AI may lead to a loss of human control over mining operations in the future,resulting in unpredictable consequences.

关键词： Sustainable mining consequences

(±)-Atrachinenins A-C,Three Pairs of Caged C_(27) Meroterpenoids from the Rhizomes of Atractylodes chinensis

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2022年第4期40卷 460-466页

作者： fei-long chen Dong-Li Liu Jing Fu Ji Yang Li-Ping Bai Wei Zhang Zhi-Hong Jiang Guo-Yuan Zhu Key Laboratory of Quality Research in Chinese Medicine Guangdong-Hong Kong-Macao Joint Laboratory of Respiratory Infectious DiseaseMacao Institute for Applied Research in Medicine and HealthMacao University of Science and TechnologyMacaoChina

Comprehensive Summary(±)-Atrachinenins A—C(1—3),three meroterpenoids possessing novel C_(27) skeletons,were isolated from the rhizomes of Atractylodes chinensis.(±)-Atrachinenin A(1)possesses an unprecedented cage-like skeleton with a fused 6/6/5/5 tetracyclic system(decahy-dro-1,5:4a,7-dimethanobenzo[7]annulene),which may be formed by the intermolecular cyclization of(±)-atrachinenin C(3).

关键词： Atractylodes chinensis Terpenoids Phytochemistry Natural products TGF-β

On the encounter desorption of hydrogen atoms on an ice mantle

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

Research in Astronomy and Astrophysics 2021年第2期21卷 113-120页

作者： Qiang Chang Xu-Li Zheng Xia Zhang Dong-Hui Quan Yang Lu Qing-Kuan Meng Xiao-Hu Li long-fei chen School of Physics and Optoeletronic Engineering Shandong University of TechnologyZibo 255000China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Department of Chemistry Eastern Kentucky UniversityRichmondKY 40475USA School of Physics&Astronomy Sun Yat-Sen UniversityZhuhai 519082China

At low temperatures(10 K),hydrogen atoms can diffuse quickly on grain ice mantles and frequently encounter hydrogen molecules,which cover a notable fraction of grain *** desorption energy of H atoms on H2 substrates is much less than that on water *** H atom encounter desorption mechanism is adopted to study the enhanced desorption of H atoms on H_(2 )*** a small reaction network,we show that the steady-state surface H abundances predicted by the rate equation model that includes H atom encounter desorption agree reasonably well with the results from the more rigorous microscopic Monte Carlo *** a full gas-grain model,H atom encounter desorption can reduce surface H ***,if a model adopts the encounter desorption of H atoms,it becomes more difficult for hydrogenation products such as methanol to form,but it is easier for C,O and N atoms to bond with each other on grain surfaces.

关键词： astrochemistry-ISM abundances-ISM molecules

Current landscape of preoperative neoadjuvant therapies for initial resectable colorectal cancer liver metastasis

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2024年第7期30卷 663-672页

作者： Xiao-fei cheng Feng Zhao Dong chen Fan-long Liu Department of Colorectal Surgery The First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003Zhejiang ProvinceChina Department of Radiation Oncology The First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003Zhejiang ProvinceChina

Colorectal cancer liver metastasis(CRLM)presents a clinical challenge,and optimizing treatment strategies is crucial for improving patient *** resection,a key element in achieving prolonged survival,is often linked to a heightened risk of *** the potential benefits of preoperative neoadjuvant chemotherapy in managing resectable liver metastases,this approach has gained attention for its role in tumor downsizing,assessing biological behavior,and reducing the risk of postoperative ***,the use of neoadjuvant chemotherapy in initially resectable CRLM sparks ongoing *** balance between tumor reduction and the risk of hepatic injury,coupled with concerns about delaying surgery,necessitates a nuanced *** article explores recent research insights and draws upon the practical experiences at our center to address critical issues regarding considerations for initially resectable *** the criteria for patient selection and the judicious choice of neoadjuvant regimens are pivotal areas of *** the right balance between maximizing treatment efficacy and minimizing adverse effects is *** dynamic landscape of precision medicine is also reflected in the evolving role of gene testing,such as RAS/BRAF and PIK3CA,in tailoring neoadjuvant ***,the review emphasizes the need for a multidisciplinary approach to navigate the comp-lexities of *** technical expertise and biological insights is crucial in refining neoadjuvant *** management of progression following neoadjuvant chemotherapy requires a tailored approach,acknowledging the diverse biological behaviors that may *** conclusion,this review aims to provide a comprehensive perspective on the considerations,challenges,and advancements in the use of neoadjuvant chemotherapy for initially resectable *** combining evidencebased insights with practical experiences,we aspire to contribute

关键词： Neoadjuvant therapy Colorectal cancer liver metastasis Multidisciplinary teams Chemotherapeutic regimens Resectability criteria

Solidification behaviour and hot cracking susceptibility of a novel Ni-based superalloy

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

Journal of Iron and Steel Research International 2024年第4期31卷 956-966页

作者： Yue chen Shao-min Lv Xing-fei Xie Xiao-can Wen Jng-long Qu Jin-hui Du High-Temperature Materials Institute China Iron and Steel Research Institute Group Co.Ltd.Beijing 100081China Beijing GAONA Materials and Technology Co. Ltd.Beijing 100081China Sichuan CISRI-GAONA Forging Co. Ltd.Deyang 610000SichuanChina

A novel Ni-based superalloy GH4151,with a γ′ volume fraction of about 55%and a service temperature capability up to 8oo oC,was *** to the different cooling conditions of various regions during the solidification of ingots,significant cooling rate variations may lead to the occurrence of hot *** scanning laser microscope was utilised to investigate the solidification process and phase precipitation behaviour of the GH4151 under wide range cooling *** characteristics of L→γ transformation were analysed,and the growth rates of at each stage were *** segregation behaviour was predicted using the Scheil equation,and the predicted results match well with the experimental *** sensitivity coefficient for hot cracking was modified,and cracking sensitivity coefficient values for the alloy under different cooling rates were computed,revealing that the alloy is most susceptible to hot cracking at 10℃/min cooling ***,controlling the cooling rate can reduce the possibility of hot cracking in ingot.

关键词： Ni-based superalloy Solidification behaviour In-situ observation Clyne and Davies's criterion:Hot cracking susceptibility

Lignin-reinforced PVDF electrolyte for dendrite-free quasi-solid-state Li metal battery

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 Metals 2024年第3期43卷 1006-1016页

作者： Xin-Yang chen Xue-Jie Gao Han-Yan Wu Yu-long Liu Xiao-fei Yang Run-Cang Sun Center for Lignocellulosic Chemistry and Biomaterials College of Light Industry and Chemical EngineeringDalian Polytechnic UniversityDalian116034China Division of Energy Storage Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China School of Chemistry Northeast Normal UniversityChangchun130024China

Quasi-solid-state lithium metal batteries(QSSLMBs)assembled with polyvinylidene fluoride(PVDF)are a promising class of next-generation rechargeable batteries due to their safety,high energy density,and superior interfacial ***,PVDF has a series of inherent drawbacks such as low ionic conductivity,ease of crystallization,and hydrophobic character that leading to poor cell *** tackle these issues,a lignin-reinforced PVDF electrolyte is proposed in this work to solve these drawbacks of PVDF and enhance the comprehensive performance of *** lithophilic polar groups of lignin can promote uniform deposition of Li on the *** with the improved mechanical properties can efficiently prevent Li dendrites penetration through the *** addition,more active sites provided by lignin can also enhance Li^(+)transport and lead to a faster electrochemical reaction *** from the ingenious design,Li symmetric cells with 5%lignin-PVDF quasi-solid-state electrolyte can operate for 900 h at a high current density/capacity of 5 mA·cm^(-2)/5 mAh·cm^(-2),while shortcircuiting occurs after 56 h for the counterpart(pure PVDF).Moreover,a full cell of Li/5%lignin-PVDF/LFP cell demonstrates a high capacity of 96.2 mAh·g^(-1)after 2000 cycles at 10 *** work is expected to open up promising opportunities to develop other high-energy/power-density QSSLMBs.

关键词： Quasi-solid-state electrolyte Lignin PVDF Dendrite-free Li metal battery