检索结果-南通市图书馆

A general framework for frequentist model averaging In Celebration of Professor Lincheng Zhao's 75th Birthday

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Mathematics 2019年第2期62卷 205-226页

作者： Priyam Mitra Heng Lian Ritwik Mitra Hua Liang Min-ge Xie department of Statistics and Biostatistics Rutgers University department of Mathematics City University of Hong Kong department of Operations Research and financial Engineering Princeton University department of Statistics George Washington University

Model selection strategies have been routinely employed to determine a model for data analysis in statistics, and further study and inference then often proceed as though the selected model were the true model that were known a priori. Model averaging approaches, on the other hand, try to combine estimators for a set of candidate models. Specifically, instead of deciding which model is the 'right' one, a model averaging approach suggests to fit a set of candidate models and average over the estimators using data adaptive *** this paper we establish a general frequentist model averaging framework that does not set any restrictions on the set of candidate models. It broaden, the scope of the existing methodologies under the frequentist model averaging development. Assuming the data is from an unknown model, we derive the model averaging estimator and study its limiting distributions and related predictions while taking possible modeling biases into *** propose a set of optimal weights to combine the individual estimators so that the expected mean squared error of the average estimator is minimized. Simulation studies are conducted to compare the performance of the estimator with that of the existing methods. The results show the benefits of the proposed approach over traditional model selection approaches as well as existing model averaging methods.

关键词： asymptotic distribution bias variance trade-off local mis-specification model averaging estimators optimal weight selection

Selecting Best Software Vulnerability Scanner Using Intuitionistic Fuzzy Set TOPSIS

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

Computers, Materials & Continua 2022年第8期72卷 3613-3629页

作者： Navneet Bhatt Jasmine Kaur Adarsh Anand Omar H.Alhazmi Anil Surendra Modi School of commerce Narsee Monjee Institute of Management StudiesDeemed to be UniversityMumbai400056India department of Operational Research Faculty of Mathematical SciencesUniversity of DelhiDelhi110007India department of Computer Science Taibah UniversityMedina30001Saudi Arabia

Software developers endeavor to build their products with the least number of *** this,many vulnerabilities are detected in software that threatens its *** automated software i.e.,vulnerability scanners,are available in the market which helps detect and manage vulnerabilities in a computer,application,or a ***,the choice of an appropriate vulnerability scanner is crucial to ensure efficient vulnerability *** current work serves a dual purpose,first,to identify the key factors which affect the vulnerability discovery process in a *** second,is to rank the popular vulnerability scanners based on the identified *** will aid the firm in determining the best scanner for them considering multiple *** multi-criterion decision making based ranking approach has been discussed using the Intuitionistic Fuzzy set(IFS)and Technique for Order of Preference by Similarity to Ideal Solution(TOPSIS)to rank the various *** IFS TOPSIS,the opinion of a whole group could be simultaneously considered in the vulnerability scanner *** this study,five popular vulnerability scanners,namely,Nessus,Fsecure Radar,Greenbone,Qualys,and Nexpose have been *** inputs of industry specialists i.e.,people who deal in software security and vulnerability management process have been taken for the ranking *** the proposed methodology,a hierarchical classification of the various vulnerability scanners could be *** clear enumeration of the steps allows for easy adaptability of the model to varied *** study will help product developers become aware of the needs of the market and design better *** from the user’s point of view,it will help the system administrators in deciding which scanner to deploy depending on the company’s needs and *** current work is the first to use a Multi Criterion Group Decision Making technique in vulnerability scanner selection.

关键词： Intuitionistic fuzzy set group decision making multi-criteria decision making(MCDM) ranking algorithm software security TOPSIS vulnerability vulnerability scanners

First experience in laparoscopic surgery in low and middle income countries: A systematic review

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Surgery 2024年第2期16卷 546-553页

作者： Rebekka Troller Jasmine Bawa Olivia Baker James Ashcroft department of Surgery Medway Maritime HospitalGillingham ME75NYKentUnited Kingdom department of Surgery University Hospital CambridgeCambridge CB20QQUnited Kingdom

BACKGROUND Laparoscopic surgery has reduced morbidity and mortality rates,shorter post-operative recovery periods and lower complication rates than open *** is routine practice in high-income countries and is becoming increasingly common in countries with limited ***,introducing laparoscopic surgery in low-and-middle-income countries(LMIC)can be expensive and requires resour-ces,equipment,and *** To report the challenges and benefits of introducing laparoscopic surgery in LMIC as well as to identify solutions to these challenges for countries with limited finances and *** MEDLINE,EMBASE and Cochrane databases were searched for studies reporting first experience in laparoscopic surgery in *** studies were published between 1996 and 2022 with full text available in *** criteria were studies considering only open surgery,ear,nose,and throat,endoscopy,arthro-scopy,hysteroscopy,cystoscopy,transplant,or bariatric *** Ten studies out of 3409 screened papers,from eight LMIC were eligible for inclusion in the final analysis,totaling 2497 *** reported challenges were related to costs of equipment and training programmes,equipment pro-blems such as faulty equipment,and access to surgical ***-related challenges were reliance on foreign trainers and lack of locally trained surgeons and theatre *** benefits of introducing laparoscopic surgery were economic and clinical,including a reduction in hospital stay,complications,and morbidi-ty/*** introduction of laparoscopic surgery also provided training opportunities for junior *** Despite financial and technical challenges,many studies emphasise the overall benefit of introducing laparoscopic surgery in LMICs such as reduced hospital stay and the related lower cost for *** many of the clinical centres in LMICs have proposed practical solutions to the challenges reported,more support is critical

关键词： Laparoscopic surgery Low and middle income country First experience Training in laparoscopic surgery

Investigating liquidity constraints as a channel of contagion: a regime switching approach

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

financial Innovation 2020年第1期6卷 435-455页

作者： Rajan Sruthi Santhakumar Shijin department of commerce Pondicherry UniversityPinPuducherry 605014India

The present study investigates the timing and repercussion of the subprime crisis of 2008–09 in a regime-switching *** interdependence and co-movement of financial markets in different countries has been enhanced due to the globalization of international trade,and investment trends can spread globally as a result of investors owning international *** study uses a regime-switching model to illustrate the timing of the crisis regime and calm regime for United States(US)stock index returns and the corresponding impact on Indian stock index *** Indian stocks investigated are classified into“remote”and“reachable”stocks,and different effects are found for these two *** is found that shocks originating in the US can be transferred to the Indian reachable market as a result of foreign *** is,however,a less persistent impact on remote ***,the study contributes to the literature on the material impacts of the crisis resulting from liquidity constraints and fear of contagion among investors.

关键词： financial crisis financial contagion Co-movement Emerging market Regime-switching

Isospin effect of the in-medium nucleon-nucleon cross section in excited nuclear reactions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics C 2014年第5期38卷 33-37页

作者：张傲郭文军黄江伟杨林孟 College of Science University of Shanghai for Science and Technology department of Physics and Astronomy Texas A&M University-Commerce

Using relativistic mean field theory, the neutron and the proton density distribution of 56Ni nuclei could be obtained in the ground state and the excited state. Based on the framework of the quantum molecular dynamics model, the 56Ni nuclei have been simulated in ground state and in the neutron or proton excited state. We then used the three different states of 56Ni to collide with the 56Ni in the ground state. To discuss the evolution of the nuclear stopping in different reactions, two kinds of different excited nuclear reactions were studied at different reaction energies and at different impact parameters. studies have shown that the nuclear stopping of an excited nuclear reaction is sensitive to the isospin-dependent in-medium nucleon-nucleon cross section, compared with the response value of the ground state nuclear reaction. So, it is better for the excited nuclei to extract the isospin dependence of nucleon-nucleon cross section information.

关键词： quantum molecular dynamics excited state nuclear stopping isospin effect

How to Reinvigorate The Real Economy

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

Beijing Review 2017年第17期60卷 34-35页

作者： Xiang Junyong the department of Industrial Research at the Chongyang Institute for financial studies of Renmin University of China

On April 7 the China Banking Regulatory Commission （CBRC）, the country＇s banking watchdog, issueda guideline urging the banking industry to focus on serving the real economy.

关键词：实体经济管理委员会银行业行业监督监管机构中国

SOWING AGRICULTURAL REFORMS

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Beijing Review 2017年第11期60卷 32-33页

作者： Xiang Junyong the department of Industrial Research at the Chongyang Institute for financial studies of Renmin University of China

On March 5,Premier Li Keqiang deliveredthe Government Work Report at theopening ceremony of the Fifth Sessionof the 12th National People’s *** suggests that this year’s agricultural workwill focus on pushing forward... 详细信息

关键词：英语阅读理解时事

Symbiotic Organisms Search with Deep Learning Driven Biomedical Osteosarcoma Detection and Classification

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2023年第4期75卷 133-148页

作者： Abdullah M.Basahel Mohammad Yamin Sulafah M.Basahel Mona M.Abusurrah K.Vijaya Kumar E.Laxmi Lydia Faculty of Economics and Administration King Abdulaziz UniversityJeddahSaudi Arabia E-commerce department College of Administrative and Financial SciencesSaudi Electronic UniversityJeddahSaudi Arabia department of Management Information Systems College of Business AdministrationTaibah UniversityAl-MadinahSaudi Arabia department of Computer Science and Engineering GITAM School of TechnologyVisakhapatnam CampusGITAM(Deemed to be a University)India department of Computer Science and Engineering GMR Institute of TechnologyAndhra PradeshRajamIndia

Osteosarcoma is one of the rare bone cancers that affect the individualsaged between 10 and 30 and it incurs high death rate. Early diagnosisof osteosarcoma is essential to improve the survivability rate and treatmentprotocols. Traditional physical examination procedure is not only a timeconsumingprocess, but it also primarily relies upon the expert’s *** this background, the recently developed Deep Learning (DL) models canbe applied to perform decision making. At the same time, hyperparameteroptimization of DL models also plays an important role in influencing overallclassification performance. The current study introduces a novel SymbioticOrganisms Search with Deep Learning-driven Osteosarcoma Detection andClassification (SOSDL-ODC) model. The presented SOSDL-ODC techniqueprimarily focuses on recognition and classification of osteosarcoma usinghistopathological images. In order to achieve this, the presented SOSDL-ODCtechnique initially applies image pre-processing approach to enhance the qualityof image. Also, MobileNetv2 model is applied to generate a suitable groupof feature vectors whereas hyperparameter tuning of MobileNetv2 modelis performed using SOS algorithm. At last, Gated Recurrent Unit (GRU)technique is applied as a classification model to determine proper class *** order to validate the enhanced osteosarcoma classification performance ofthe proposed SOSDL-ODC technique, a comprehensive comparative analysiswas conducted. The obtained outcomes confirmed the betterment of SOSDLODCapproach than the existing approaches as the former achieved a maximumaccuracy of 97.73%.

关键词： Osteosarcoma medical imaging deep learning feature vectors computer aided diagnosis image classification

RCEP: A Boost for Asia-Pacific Regional Economic Integration

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Today 2021年第1期70卷 48-50页

作者： LIU YING Cooperation Research department at Chongyang Institute for financial studies of Renmin University of China

AFTER eight years of negotiations,15 countries of the Asia-Pacific region signed a free trade agreement on the Regional Comprehensive Economic Partnership(RCEP)on November 15,2020,which was initiated by the Association of Southeast Asian Nations(ASEAN)in *** the world’s largest free trade area came into *** the midst of the COVID-19 pandemic,the signing of this agreement gives a strong impetus to Asia-Pacific regional economic integration and injects a powerful new stimulus to the global economic recovery.

关键词： RCEP Regional initiated