检索结果-南通市图书馆

Attribute Reduction on Decision Tables Based on Hausdorff Topology

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第11期81卷 3097-3124页

作者： nguyen Long Giang Tran thanh Dai Le Hoang Son Tran Thi Ngan nguyen Nhu Son Cu nguyen Giap Institute of Information Technology Vietnam Academy of Science and TechnologyHanoi10000Vietnam Faculty of Information Technology University of Economics-Technology for IndustriesHanoi10000Vietnam VNU Information Technology Institute Vietnam National UniversityHanoi10000Vietnam International School Vietnam National UniversityHanoi10000Vietnam Center of Science and Technology Research and Development Thuongmai UniversityHanoi10000Vietnam

Attribute reduction through the combined approach of Rough Sets(RS)and algebraic topology is an open research topic with significant potential for *** research works have introduced a strong relationship between RS and topology spaces for the attribute reduction ***,the mentioned recent methods followed a strategy to construct a new measure for attribute ***,the strategy for searching for the reduct is still to select each attribute and gradually add it to the ***,those methods tended to be inefficient for high-dimensional *** overcome these challenges,we use the separability property of Hausdorff topology to quickly identify distinguishable attributes,this approach significantly reduces the time for the attribute filtering stage of the *** addition,we propose the concept of Hausdorff topological homomorphism to construct candidate reducts,this method significantly reduces the number of candidate reducts for the wrapper stage of the *** are the two main stages that have the most effect on reducing computing time for the attribute reduction of the proposed algorithm,which we call the Cluster Filter Wrapper algorithm based on Hausdorff *** validation on the UCI Machine Learning Repository Data shows that the proposed method achieves efficiency in both the execution time and the size of the reduct.

关键词： Hausdorff topology rough sets topology from rough sets attribute reduction

Assessing Asian Economies Renewable Energy Consumption Efficiency Using DEA with Undesirable Output

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Systems Science & Engineering 2022年第10期43卷 347-362页

作者： Chia-Nan Wang Ngoc-Ai-Thy nguyen thanh-Tuan Dang Jing-Wein Wang Department of Industrial Engineering and Management National Kaohsiung University of Science and TechnologyKaohsiung80778Taiwan Department of Logistics and Supply Chain Management Hong Bang International UniversityHo Chi Minh723000Vietnam Institute of Photonics Engineering National Kaohsiung University of Science and TechnologyKaohsiung80778Taiwan

Along with vast non-fossil potential and significant expertise,there is a question of whether Asian nations are attaining efficient consumption and exploitation of renewable *** this perspective,the paper aims to evaluate the efficiency of 14 potential Asia countries in renewable energy consumption during the six-year periods(2014-2019).In analyzing the performance of the renewable energy sector,the data envelopment analysis(DEA)with an undesirable output model approach has been widely utilized to measure the efficiency of peer units compared with the best practice *** consider four inputs and two outputs to a DEA-based efficiency *** force,total energy consumption,share of renewable energy,and total renewable energy capacity are *** outputs consist of CO_(2)emissions as an undesirable output and gross domestic product as a desirable *** results show that United Arab Emirates,Saudi Arabia,Japan,and South Korea consistently outperform in the evaluation,achieving perfect efficiency scores during the research *** is found to have the lowest average efficiency of renewable energy utilization.

关键词： Asia renewable energy efficiency frontier data envelopment analysis bad output

Dealing with the Class Imbalance Problem in the Detection of Fake Job Descriptions

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 2021年第7期68卷 521-535页

作者： Minh thanh Vo Anh H.Vo Trang nguyen Rohit Sharma Tuong Le Faculty of Information Technology Ho Chi Minh City University of Technology(HUTECH)Ho Chi Minh CityVietnam Faculty of Information Technology Ton Duc Thang UniversityHo Chi Minh CityVietnam Faculty of Information Technology Ho Chi Minh City Open UniversityHo Chi Minh CityVietnam Department of Electronics&Communication Engineering SRM Institute of Science and TechnologyNCR CampusGhaziabadIndia Informetrics Research Group Ton Duc Thang UniversityHo Chi Minh CityVietnam

In recent years,the detection of fake job descriptions has become increasingly necessary because social networking has changed the way people access burgeoning information in the internet *** fraud in job descriptions can help jobseekers to avoid many of the risks of job ***,the problem of detecting fake job descriptions comes up against the problem of class imbalance when the number of genuine jobs exceeds the number of fake *** causes a reduction in the predictability and performance of traditional machine learning *** therefore present an efficient framework that uses an oversampling technique called FJD-OT(Fake Job Description Detection Using Oversampling Techniques)to improve the predictability of detecting fake job *** the proposed framework,we apply several techniques including the removal of stop words and the use of a tokenizer to preprocess the text data in the first *** then use a bag of words in combination with the term frequency-inverse document frequency(TF-IDF)approach to extract the features from the text data to create the feature dataset in the second ***,our framework applies k-fold cross-validation,a commonly used technique to test the effectiveness of machine learning models,that splits the experimental dataset[the Employment Scam Aegean(ESA)dataset in our study]into training and test sets for *** training set is passed through the third module,an oversampling module in which the SVMSMOTE method is used to balance data before training the classifiers in the last *** experimental results indicate that the proposed approach significantly improves the predictability of fake job description detection on the ESA dataset based on several popular performance metrics.

关键词： Fake job description detection class imbalance problem oversampling techniques

Effect of thinning intensity on tree growth and temporal variation of seed and cone production in a Pinus koraiensis plantation

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 Forestry Research 2019年第3期30卷 835-845页

作者： thanh Tuan nguyen Dinh Tien Tai Peng Zhang Muhammad Razaq Hai-Long Shen School of Forestry Northeast Forestry University Harbin 150040People’s Republic of China Department of Forestry Vietnam Forestry University-Second CampusOkayamaDongnai 810000Vietnam Graduate School of Environmental and Life Science Okayama UniversityOkayamaJapan

Thinning of Korean pine (Pinus koraiensis Sieb. et Zucc.) is used to facilitate timber and cone production. The present study in Northeast China investigated the effects of thinning intensity on individual tree growth, temporal variation in cone yield, and seed quality in Korean pine plantation. In 2005, five thinning intensity levels (none, extreme, heavy, moderate and light) were set in 15 permanent plots in a 32-year-old Korean pine plantation at Mengjiagang Forest Farm, Jiamusi City, Heilongjiang Province. We recorded tree growth and seed cone production from 2013 to 2016, i.e., from 8 to 11 years after thinning. Except for height growth, thinning increased tree growth (diameter at breast height and crown size) and improved cone yield. The extreme thinning treatment (to 300 trees per hectare) resulted in the largest tree diameter, tree volume, crown size and 4-year cone production per tree. The highest cone yield per tree in the mast year (2014) was observed when stands were thinned to 500 trees per hectare (heavy thinning). Although the best cone and seed quality and the largest cone and seed mass per tree were recorded in the heavily thinned stand, no significant differences were found between heavy and moderate thinning stands (750 trees per hectare). At the stand level, the moderately thinned stand had the highest basal area, stock volume and seed cone production per stand. Our results suggest that thinning to 750 trees per hectare will improve timber and cone productivity in 40-year-old P. koraiensis stands.

关键词： Korean pine Thinning intensity Seed yield Tree growth Temporal variation in cone yield

Insights and implications from the study on meniscus reconstruction using tendon autograft

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

World Journal of Orthopedics 2024年第11期15卷 1109-1111页

作者： Phi Duong nguyen thanh Kien Lam Department of Orthopaedic-Burn-Plastic Surgery City Children's HospitalHo Chi Minh City 71815Viet Nam The Faculty of Medical Technology Van Lang UniversityHo Chi Minh City 700000Viet Nam

This letter addresses the recent study by Zhu et al on the predictive factors for coronal and sagittal graft extrusion length following medial meniscus reconstruction using tendon *** study provides valuable insights into the importance of preoperative joint space width and tunnel positioning as predictors of graft ***,it found strong correlations between preoperative joint space width and medial,posterior,and mean graft extrusion at both 1 week and 8 months ***,tunnel edge distance at 1 week postoperation correlated with anterior and posterior graft *** findings offer critical guidance for improving surgical ***,the letter highlights the need for further research with larger sample sizes and comparative studies involving different graft types to strengthen these findings and broaden their applicability in clinical *** study's contributions to understanding meniscus reconstruction using tendon autografts are acknowledged,along with suggestions for future research directions.

关键词： Meniscus reconstruction Tendon autograft Graft extrusion Joint space width Tunnel positioning Surgical outcomes

How to Use Artificial Intelligence to Evaluate Board Efficiency

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 Artificial Intelligence and Technology 2024年第1期4卷 56-63页

作者： nguyen Thi thanh Binh Huang Pin-Yu Department of Accounting Chaoyang University of Technology168 Jifong E.RoadWufong DistrictTaichung City 41349TaiwanChina

The era of the technological revolution brought rapid changes in the way businesses are managed and operated with new *** study applies and develops artificial neural networks(ANNs)to predict the return on equity(ROE)and return on assets(ROA)based on data of the structure of the board of directors and managers of 839 Taiwan residents electronics firms listed on the Taiwan Stock Exchange for the period 2000 to *** results show that the characteristics of the board of directors and managers decide 64.25% of the value of the ROE and 67.05% of the *** results also show that the board with fewer members is easy to reach a consensus on decisions rather than a larger board,leading to better firm *** ROE and ROA are at their worst,board members use their power to protect their ***,independent board members have a negative influence on financial *** company size has always been a strong supporter of high profitability,and a high debt ratio has not yet brought about tax savings.

关键词： artificial neural networks financial performance threshold regression

Temperature and Precipitation Suitability Evaluation for the Winter Wheat and Summer Maize Cropping System in the Huang-Huai-Hai Plain of China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Agricultural Sciences in China 2011年第2期10卷 275-288页

作者： nguyen thanh Tuan QIU Jian-jun Ann Verdoodt LI Hu Eric Van Ranst Vietnam National Museum of Nature Vietnamese Academy of Science and TechnologyHa Noi 0000Vietnam Key Laboratory of Resources Remote Sensing and Digital Agriculture Ministry of Agriculture/Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural Sciences（CAAS）Beijing 100081P.R.China Laboratory of Soil Science Department of Geology and Soil Science（WE13）Ghent UniversityB-9000 GhentBelgium

The Huang-Huai-Hai Plain is the most important winter wheat and maize production region in *** response to the increasing population pressure,the Chinese authorities strongly invested in improving the irrigation systems and increasing ground and surface water exploitation within the plain to increase the crop *** resulted in a reduction of water resource availability and in turn indirectly affected the suitability of various agricultural ecosystems in the *** main purpose of this study was to review the suitability of temperature and precipitation for the winter wheat and summer maize cropping system in the Huang-Huai-Hai Plain,in order to provide a preliminary irrigation *** analysis provides a first attempt to enhance the water resource management as well as to increase the water use *** this aim,a GIS-based multicriteria analysis procedure has been developed consisting of（1） definition of objectives（evaluated entities） and database building;（2） definition of evaluation criteria;（3） standardization of the criteria;（4） combination of the criteria;（5） classification of the objectives;and（6） integration of the *** land suitability classification maps were transformed into maps of required irrigation amounts for each growing stage of the winter wheat and summer maize cropping *** study also exemplified the limitations and proposed future research activities that will improve the detail and accuracy of the evaluation results.

关键词： GIS multicriteria Huang-Huai-Hai Plain precipitation suitability irrigation

Study of vertically ascending flight of a hawkmoth model

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

Acta Mechanica Sinica 2020年第5期36卷 1031-1045,I0002页

作者： Anh Tuan nguyen Vu Dan thanh Le The Hung Tran V.N.Due Van Binh Phung Faculty of Aerospace Engineering Le Quy Don Technical UniversityHanoiVietnam Institute of Theoretical and Applied Research.Duy Tan University HanoiVietnam Division of Construction Computation Institute for Computational ScienceTon Due Thang UniversityHo Chi Minh CityVietnam Faculty of Civil Engineering Ton Due Thang UniversityHo Chi Minh CityVietnam

This paper provides insight into the wing kinematics,the power requirement and the dynamic stability characteristics of a hawkmoth model in vertically ascending *** wing kinematics of the hawkmoth model is obtained based on the minimum required power *** optimization process is conducted using genetic and simplex algorithms that are coupled with an artificial neural network to rapidly predict the aerodynamic force and required *** training data for the neural network are generated from an unsteady vortex-lattice *** to hover,the results in this study show the larger flapping frequency and the smaller rotation amplitude of the hawkmoth wing kinematics in ascending ***,more power is required when the ascending speed *** conducting a dynamic modal analysis based on a cycle-average approach,the certain effect of the ascending speed on the modal structures of the hawkmoth model was observed.

关键词： Hawkmoth Ascending flapping flight-Genetic algorithm Artificial neural network Flight dynamic stability

Combining SnO_(2-x)and g-C_(3)N_(4)nanosheets toward S-scheme heterojunction for high selectivity into green products of NO degradation reaction under visible light

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 Materiomics 2022年第1期8卷 1-8页

作者： Pham Van Viet thanh-Dat nguyen Dai-Phat Bui Cao Minh Thi Faculty of Materials Science and Technology University of ScienceVNU-HCM227 Nguyen Van Cu StreetDistrict 5Ho Chi Minh City700000Viet Nam Vietnam National University-Ho Chi Minh City Thu Duc DistrictHo Chi Minh City700000Viet Nam Ho Chi Minh City University of Technology(HUTECH) 475A Dien Bien Phu StreetBinh Thanh DistrictHo Chi Minh City700000Viet Nam

NOx emissions cause many negative impacts on the living *** photocatalysis of semiconductors is superior for nitric oxide(NO)degradation due to their low redox *** this report,we combine SnO_(2-x)/g-C_(3)N_(4)heterojunction photocatalyst toward the high selectivity into green products under visible light *** show that SnO_(2-x)/g-C_(3)N_(4)heterojunction degraded 40.8%of NO,which is 1.6 times higher than that of g-C_(3)N_(4).In addition,the selectivity coefficient of SnO_(2-x)/g-C_(3)N_(4)is higher 3 times than both pure SnO_(2-x)and g-C_(3)N_(4).Furthermore,SnO_(2-x)/g-C_(3)N_(4)expresses a superior stability for NO photocatalytic-degradation after five *** scavenger trapping test results,and electron spin resonance(ESR)analysis also provide more understanding of the charge transfer mechanism of ***_(2-x)/g-C_(3)N_(4)heterojunction shows a high removal efficiency of NO gas,making it an up-and-coming environmental treatment candidate.

关键词： G-C_(3)N_(4) NO removal Oxygen vacancies Photocatalysis S-scheme