检索结果-南通市图书馆

Law of iterated logarithm and model selection consistency for generalized linear models with independent and dependent responses

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Frontiers of Mathematics in China 2021年第3期16卷 825-856页

作者： Xiaowei YANG shuang song Huiming ZHANG School of Mathematics and Statistics Chaohu UniversityChaohuHefei238024China Center for Statistical Science Tsinghua UniversityBeijing100084China Department of Industrial Engineering Tsinghua UniversityBeijing100084China Department of Mathematics University of MacaoTaipa MacaoChina UMacao Zhuhai Research Institute Zhuhai519000China

We study the law of the iterated logarithm (LIL) for the maximum likelihood estimation of the parameters (as a convex optimization problem) in the generalized linear models with independent or weakly dependent (ρ-mixing) responses under mild conditions. The LIL is useful to derive the asymptotic bounds for the discrepancy between the empirical process of the log-likelihood function and the true log-likelihood. The strong consistency of some penalized likelihood-based model selection criteria can be shown as an application of the LIL. Under some regularity conditions, the model selection criterion will be helpful to select the simplest correct model almost surely when the penalty term increases with the model dimension, and the penalty term has an order higher than O(log log n) but lower than O(n). Simulation studies are implemented to verify the selection consistency of Bayesian information criterion.

关键词： Generalized linear models(GLMs) weighted scores method non-natural link function model selection consistency weakly dependent

Practical Optimal Control of Large-scale Water Distribution Network

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

High Technology Letters 2004年第4期10卷 79-82页

作者：吕谋 song shuang School of Environmental and Municipal Engineering Qingdao Technological University Qingdao P.R.China Department of Environmental Engineering Zhejiang University of Technology Hangzhou P.R.China

According to the network characteristics and actual state of the water supply system in China, the implicit model, which can be solved by the hierarchical optimization method, was established. In special, based on the analyses of the water supply system containing variable-speed pumps, a software has been developed successfully. The application of this model to the city of Hangzhou (China) was compared to experiential strategy. The results of this study showed that the developed model is a promising optimization method to control the large-scale water supply systems.

关键词：最佳控制系统配水工程水量向量分析法供水系统

Directional nearest neighbor query method for specified geographical direction space based on Voronoi diagram

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

High Technology Letters 2022年第2期28卷 122-133页

作者： LI song song shuang HAO Xiaohong ZHANG Liping College of Computer Science and Technology Harbin University of Science and TechnologyHarbin 150080P.R.China

The existing nearest neighbor query methods cannot directly perform the nearest neighbor query of specified geographical direction *** order to compensate the shortcomings of the existing methods,a directional nearest neighbor query method in specific direction space based on Voronoi diagram is put *** work studies two cases,*** query point is static and the query point moves with a constant *** the static condition,the corresponding pruning method and the pruning algorithm of the specified direction nearest neighbor(pruning_SDNN algorithm)are proposed by combining the plane right-angle coordinate system with the north-west direction,and then according to the smallest external rectangle of Voronoi polygon,the specific query is made and the direction nearest neighbor query based on Voronoi rectangle(VR-DNN) algorithm is *** the case of moving with a constant velocity,first of all,the combination of plane right angle coordinate system,geographical direction and circle are used,the query range is determined and pruning methods and the pruning algorithm of the direction nearest neighbor based on decision circle(pruning_DDNN algorithm) are put ***,according to the different position of motion trajectory and Voronoi diagram,a specific query through the nature of Voronoi diagram is *** last,the direction nearest neighbor query based on Voronoi diagram and motion trajectory(VM-DNN) algorithm is put *** theoretical research and experiments show that the proposed algorithm can effectively deal with the problem of the nearest neighbor query for a specified geographical direction space.

关键词： nearest neighbor query direction Voronoi diagram rectangular plane coordinate system

Update on Mayer—Rokitansky—Küster—Hauser syndrome

在线全文

学校读者我要写书评

暂无评论

Frontiers of Medicine 2022年第6期16卷 859-872页

作者： Na Chen shuang song Xinmiao Bao Lan Zhu National Clinical Research Center for Obstetric and Gynecologic Diseases Department of Obstetrics and GynecologyState Key Laboratory of Complex Severe and Rare DiseasesPeking Union Medical College HospitalPeking Union Medical College and Chinese Academy of Medical SciencesBeijing100730China Peking Union Medical College M.D.ProgramBeijing100730China

This review presents an update of Mayer—Rokitansky—Küster—Hauser(MRKH)syndrome on its etiologic,clinical,diagnostic,psychological,therapeutic,and reproductive *** etiology of MRKH syndrome remains unclear due to its intrinsic *** and genetic causes that may interact during the embryonic development have been proposed with no definitive etiopathogenesis *** proportion of concomitant extragenital malformations varies in different studies,and the discrepancies may be explained by ethnic *** addition to physical examination and pelvic ultrasound,the performance of pelvic magnetic resonance imaging is crucial in detecting the presence of rudimentary uterine *** syndrome has long-lasting psychological effects on patients,resulting in low esteem,poor coping strategies,depression,and anxiety *** psychological counseling and peer support to diagnosed patients is *** and timely psychological intervention could significantly improve a patient’s *** nonsurgical and surgical methods have been suggested for treatment of MRKH *** to the high success rate and minimal risk of complications,vaginal dilation has been proven to be the first-line *** is the second-line option for patients experiencing dilation *** transplantation and gestational surrogacy are options for women with MRKH syndrome to achieve biological motherhood.

关键词： MRKH(Mayer-Rokitansky-Küster-Hauser)syndrome etiology clinical characteristic diagnosis treatment psychological effect

Variable stiffness methods of flexible robots for minimally invasive surgery:A review

在线全文

学校读者我要写书评

暂无评论

Biomimetic Intelligence & Robotics 2024年第3期4卷 3-14页

作者： Botao Lin shuang song Jiaole Wang Harbin Institute of Technology(Shenzhen) Shenzhen 518055China

With high flexibility and slim body,flexible robots have been widely used in minimally invasive surgery because they can safely reach the lesion deep inside the human body through small incisions or natural ***,high stiffness of robot body is also required for transferring force and maintaining the motion *** meet these two contradictory requirements,various methods have been implemented to enable adjustable stiffness for flexible surgical *** this review,we first summarize the anatomic constraints of common natural tracts of human body to provide a guidance for the design of variable stiffness flexible *** then,the variable stiffness methods have been categorized based on their basic principles of varying the *** the end,two variable stiffness methods with great potential and the moving strategy of variable stiffness flexible robots are discussed.

关键词： Minimally invasive surgery Continuum robot Variable stiffness

Optimal Dispatching of Large-scale Water Supply System

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

High Technology Letters 2003年第2期9卷 21-26页

作者：吕谋 song shuang Zhao Hongbin ZHANG Tuqiao Department of Civil Engineering Zhejiang University Hangzhou 310013 P.R.China Department of Environmental Engineering Zhejiang University of Technology Hangzhou 310032 P.R.China Department of Municipal Engineering Harbin Institute of Technology Harbin 150001 P.R.China

This paper deals with the use of optimal control techniques in large-scale water distribution networks. According to the network characteristics and actual state of the water supply system in China, the implicit model, which may be solved by utilizing the hierarchical optimization method, is established. In special, based on the analyses of the water supply system containing variable-speed pumps, a software tool has been developed successfully. The application of this model to the city of Shenyang (China) is compared to experiential strategy. The results of this study show that the developed model is a very promising optimization method to control the large-scale water supply systems.

关键词： optimal dispatching water supply system water networks implicit model hierarchical optimization

Editorial for the special issue on design,sensing and control in medical robots

在线全文

学校读者我要写书评

暂无评论

Biomimetic Intelligence & Robotics 2024年第3期4卷 1-2页

作者： Jiaole Wang shuang song Li Liu Harbin Institute of Technology ShenzhenChina School of Engineering Great Bay UniversityDongguanChina

In the past decades,surgical robotics have been developed rapidly,promoting significant progress in the medical *** the support of compact system design and advanced sensing technology,surgical robotics have successfully reduced doctors’training costs and surgical risks,and also shorten the patient recovery *** continual progress advances in materials,microelectronics,medical vision,control theory and other related fields have played a pivotal role in facilitating unprecedented breakthroughs in surgical *** advancements have resulted in improved biocompatibility and control accuracy of surgical robots,as well as enhanced intraoperative sensing *** a result,the prospects for medical applications of surgical robots are broad and promising.

关键词： breakthrough robots control

Differences in the Tectonic Evolution of Basins in the CentralSouthern South China Sea and their Hydrocarbon Accumulation Conditions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2021年第1期95卷 30-40页

作者： TANG Wu ZHAO Zhigang song shuang WANG Yibo XIE Xiaojun LIU Shixiang CNOOC Research Institute Co. Ltd.Beijing 100028China

To reveal the causes of differences in the hydrocarbon accumulation in continental marginal basins in the centralsouthern South China Sea,we used gravity-magnetic,seismic,drilling,and outcrop data to investigate the tectonic histories of the basins and explore how these tectonic events controlled the hydrocarbon accumulation conditions in these *** the subduction of the Cenozoic proto-South China Sea and the expansion of the new South China Sea,the continental margin basins in the central-southern South China Sea could be classified as one of three types of epicontinental basins:southern extensional-foreland basins,western extensional-strike slip basins,and central extensional-drift *** these basins have different tectonic and sedimentary histories,they also differ in their accumulated hydrocarbon *** the Cenozoic,the basin groups in the southern South China Sea generally progressed through three stages:faulting and subsidence from the late Eocene to the early Miocene,inversion and uplift in the middle Miocene,and subsidence since the late *** source rocks with marine-continental transitional facies dominated byⅡ-Ⅲkerogen largely developed in extremely thick Miocene sedimentary series with the filling characteristics being mainly deep-water deposits in the early stage and shallow water deposits in the late *** well-developed sandstone and carbonate reservoirs,this stratum has a strong hydrocarbon generation *** the Cenozoic,the basin groups in the western South China Sea also progressed through the three developmental stages discussed *** source rocks with lacustrine facies,marine-continental transitional facies,and terrigenous marine facies dominated byⅡ2-Ⅲkerogen largely developed in the relatively thick stratum with the filling characteristics being mainly lacustrine deposits in the early stage and marine deposits in the late *** a reservoir comprised of self-generated a

关键词： tectonic evolution hydrocarbon accumulation continental margin central-southern South China Sea proto-South China Sea

Extended model predictive control scheme for smooth path following of autonomous vehicles

在线全文

学校读者我要写书评

暂无评论

Frontiers of Mechanical Engineering 2022年第1期17卷 34-49页

作者： Qianjie LIU shuang song Huosheng HU Tengchao HUANG Chenyang LI Qingyuan ZHU Department of Mechanical and Electrical Engineering Xiamen UniversityXiamen 361102China School of Computer Science and Electronic Engineering University of EssexColchester CO43SQUK

This paper presents an extended model predictive control(MPC)scheme for implementing optimal path following of autonomous vehicles,which has multiple constraints and an integrated model of vehicle and road *** curvature and inclination factors are used in the construction of the vehicle dynamic model to describe its lateral and roll dynamics ***,rollover,and vehicle envelopes are used as multiple constraints in the MPC controller ***,an extended MPC method solved by differential evolution optimization algorithm is proposed to realize optimal smooth path following based on driving path ***,simulation and real experiments are carried out to evaluate the feasibility and the effectiveness of the extended MPC *** indicate that the proposed method can obtain the smooth transition to follow the optimal drivable path and satisfy the lateral dynamic stability and environmental constraints,which can improve the path following quality for better ride comfort and road availability of autonomous vehicles.

关键词： autonomous vehicles vehicle dynamic modeling model predictive control path following optimization algorithm