检索结果-南通市图书馆

DSCA-Net: Indoor Head Detection Network Using Dual-Stream Information and Channel Attention

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2020年第6期29卷 1102-1109页

作者： QIN Pinle SHEN Wenxiang ZENG Jianchao school of big data North University of China

We propose a novel indoor head detection network using dual-stream information and multi-attention that can be used for indoor crowd *** solve the problem of object scale diversity in indoor human head detection,especially the problem of smallscale human head,we propose a dual-stream information flow structure to enrich the positioning and category semantic information of small-scale *** propose a kind of structure of the channel-attention mechanism which is used to enhance the ability of the network to identify small-scale *** method has achieved a recall rate of 0.91 and an f1 score of 0.92 on SCUT-HEAD,which achieves the state-of-art performance in the field of indoor crowd detection.

关键词： object detection indoor head detection network SCUT-HEAD channel-attention mechanism small-scale objects category semantic information dual-stream information flow structure smallscale human head indoor human head detection object scale diversity indoor crowd counting multiattention DSCA-net indoor crowd detection Pedestrian detection object detection Attention mechanism Deep learning

SoME CoNVERGENCE PRoBLEMS REGARDING THE fRACTIoNAL SCHRoDINGER PRoPAGAToR oN NoNCoMPACT MANIfoLDS

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Scientia 2023年第5期43卷 2309-2319页

作者：潘亚丽 school of Mathematics and big data Chaohu UniversityHefei 238024China

Let L be the Laplace-Beltrami *** an n-dimensional(n≥2),complete,noncompact Riemannian manifold M,we prove that if 0α/2 and f∈Hs(M),then the fractional Schr?dinger propagator e(it|L|α/2)(f)(x)→f(x)*** t→*** addition,for when M is a Lie group,the rate of the convergence is also *** results are a non-trivial extension of results on Euclidean spaces and compact manifolds.

关键词： Schrodinger propagator noncompact manifolds spectra

Embedding Theorems for L-Algebras and Anti-commutative Algebras

在线全文

学校读者我要写书评

暂无评论

Algebra Colloquium 2019年第1期26卷 51-64页

作者： Qiuhui Mo school of Mathematics and big data Huizhou University Huizhou Guangdong 516007 China

Bokut, Chen and Huang proved that every countably generated L-algebra over a cou nt able field can be embedded into a simple t wo-generated L-algebra. In this paper, we prove that every countably generated L-algebra can be embedded into a simple two-generated L-algebra. We also prove that every anti-commutative algebra can be embedded into a simple anti-commutative algebra, and that every countably generated anti-commutative algebra can be embedded into a simple two-generated anti-commutative algebra. finally, we prove that every anti-commutative algebra can be embedded into its universal enveloping non-associative algebra.

关键词： L-algebra anti-commutative algebra Grdbner-Shirshov basis

Some Convergence Properties for Weighted Sums of Martingale Difference Random Vectors

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

Acta Mathematica Sinica,English Series 2024年第4期40卷 1127-1142页

作者： Yi WU Xue Jun WANG school of big data and Artificial Intelligence Chizhou UniversityChizhou 247000P.R.China school of big data and Statistics Anhui UniversityHefei 230601P.R.China

Let{X_(ni),f_(ni);1≤i≤n,n≥1}be an array of R^(d)martingale difference random vectors and{A_(ni),1≤i≤n,n≥1}be an array of m×d matrices of real *** this paper,the Marcinkiewicz-Zygmund type weak law of large numbers for maximal weighted sums of martingale difference random vectors is obtained with not necessarily finite p-th(1omplete convergence and strong law of large numbers are established under some mild *** application to multivariate simple linear regression model is also provided.

关键词： Martingale difference random vectors weighted sums Marcinkiewicz–Zygmund type weak law of large numbers complete convergence strong law of large numbers multivariate simple linear regression model

High Performance Electrically Small Huygens Rectennas Enable Wirelessly Powered Internet of Things Sensing Applications:A Review

在线全文

学校读者我要写书评

暂无评论

Engineering 2022年第4期8卷 42-59页

作者： Wei Lin Richard W.Ziolkowski Global big data Technologies Centre School of Electrical and Data EngineeringUniversity of Technology SydneyUltimoNSW 2007Australia

far-field wireless power transfer(WPT)is a major breakthrough technology that will enable the many anticipated ubiquitous Internet of Things(IoT)applications associated with fifth generation(5G),sixth generation(6G),and beyond wireless ***,which are the combination of rectifying circuits and antennas,are the most critical components in far-field WPT ***,compact application devices require even smaller integrated rectennas that simultaneously have large electromagnetic wave capture capabilities,high alternating current(AC)-to-direct current(DC)(AC-to-DC)conversion efficiencies,and facilitate a multifunctional wireless *** paper reviews various rectenna miniaturization techniques such as meandered planar inverted-f antenna(PIfA)rectennas;miniaturized monopole-and dipole-based rectennas;fractal loop and patch rectennas;dielectric-loaded rectennas;and electrically small near-field resonant parasitic *** performance characteristics are summarized and then compared with our previously developed electrically small Huygens rectennas that are proven to be more suitable for IoT *** have been tailored,for example,to achieve batteryfree IoT sensors as is demonstrated in this ***-free,wirelessly powered devices are smaller and lighter in weight in comparison to battery-powered ***,they are environmentally friendly and,hence,have a significant societal benefit.A series of high-performance electrically small Huygens rectennas are presented including Huygens linearly-polarized(HLP)and circularly-polarized(HCP)rectennas;wirelessly powered IoT sensors based on these designs;and a dual-functional HLP rectenna and antenna ***,two linear uniform HLP rectenna array systems are considered for significantly larger wireless power *** arrays illustrate how they can be integrated advantageously with DC or radio frequency(Rf)power-combining schemes for practical IoT applications.

关键词： Antenna Array Cardioid pattern Electrically small antenna Huygens dipole antenna Internet of Things(IoT) Rectenna Rectifier circuit Wireless power transfer

Attribute Reduction of Hybrid Decision Information Systems Based on fuzzy Conditional Information Entropy

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第5期79卷 2063-2083页

作者： Xiaoqin Ma Jun Wang Wenchang Yu Qinli Zhang school of big data and Artificial Intelligence Chizhou UniversityChizhou247000China Anhui Education big data Intelligent Perception and Application Engineering Research Center Chizhou247000China

The presence of numerous uncertainties in hybrid decision information systems(HDISs)renders attribute reduction a formidable *** available attribute reduction algorithms,including those based on Pawlak attribute importance,Skowron discernibility matrix,and information entropy,struggle to effectively manages multiple uncertainties simultaneously in HDISs like the precise measurement of disparities between nominal attribute values,and attributes with fuzzy boundaries and abnormal *** order to address the aforementioned issues,this paper delves into the study of attribute reduction *** of all,a novel metric based on the decision attribute is introduced to solve the problem of accurately measuring the differences between nominal attribute *** newly introduced distance metric has been christened the supervised distance that can effectively quantify the differences between the nominal attribute ***,based on the newly developed metric,a novel fuzzy relationship is defined from the perspective of“feedback on parity of attribute values to attribute sets”.This new fuzzy relationship serves as a valuable tool in addressing the challenges posed by abnormal attribute ***,leveraging the newly introduced fuzzy relationship,the fuzzy conditional information entropy is defined as a solution to the challenges posed by fuzzy *** effectively quantifies the uncertainty associated with fuzzy attribute values,thereby providing a robust framework for handling fuzzy information in hybrid information ***,an algorithm for attribute reduction utilizing the fuzzy conditional information entropy is *** experimental results on 12 datasets show that the average reduction rate of our algorithm reaches 84.04%,and the classification accuracy is improved by 3.91%compared to the original dataset,and by an average of 11.25%compared to the other 9 state-of-the-art reduction *** comprehensive analysis o

关键词： Hybrid decision information systems fuzzy conditional information entropy attribute reduction fuzzy relationship rough set theory(RST)

Leader-follower: Human-centered intention-guided controller for novel SuperLimb with application to load-carrying scenarios

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

Science China Technological Sciences 2025年第1期 325-338页

作者： Qinghua ZHANG Xianglong LI Hongwei JING Kerui SUN Yuancheng LI Sikai ZHAo Lele LI Haotian JU Ziqi WANG Rui WU Tianjiao ZHENG Jie ZHAo Yanhe ZHU The State Key Laboratory of Robotics and System Harbin Institute of Technology The Learning Algorithms and Systems Laboratory School of Engineeringécole Polytechnique Fédérale de Lausanne

Supernumerary robotic arms(SuperLimb) are a new type of wearable robot that works closely with humans as a third hand to augment human operation capability. Accurate conveyance of wearers' intentions, allocation of roles, and humancentered interaction considerations are the key points in the process of human–SuperLimb collaboration. This paper proposes a human-centered intention-guided leader–follower controller that relies on the dynamic modeling of SuperLimb with application to load-carrying scenarios. The proposed leader–follower controller takes the human as the leader and the SuperLimb as the follower, achieving effective information communication, autonomous coordination, and good force compliance between SuperLimb, humans, and the environment under human safety assurance. first, the human–SuperLimb dynamic system is modeled to achieve force interaction with the environment and wearer. Second, to achieve the precise intention extraction of humans, pose data from five visual odometry sensors are fused to capture the human state, the generalized position, the velocity of hands, and the surface electromyography signals from two myoelectric bracelets sensors are processed to recognize the natural hand gestures during load-carrying scenarios by a designed Swin transformer network. Then, based on the real-time distance detection between human and mechanical limbs, the security assurance and force-compliant interaction of the human–SuperLimb system are realized. finally, the human hand muscle intention recognition, human–robot safety strategy verification,and comparative load-carrying experiments with and without the proposed method are conducted on the SuperLimb *** showed that the task parameters are well estimated to produce more reasonable planning trajectories, and SuperLimb could well understand the wearer's intentions to switch different SuperLimb actions. The proposed sensor-based human–robot communication framework motivates future studies of o

关键词：

Tracking consensus for nonlinear heterogeneous multi-agent systems subject to unknown disturbances via sliding mode control

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2017年第7期26卷 39-48页

作者：张翔王金环杨德东徐勇 school of Sciences Hebei Province Key Laboratory of big data Calculation Hebei University of Technology school of Control Science and Engineering Hebei University of Technology

We investigate the tracking control for a class of nonlinear heterogeneous leader-follower multi-agent systems（MAS）with unknown external disturbances. firstly, the neighbor-based distributed finite-time observers are proposed for the followers to estimate the position and velocity of the leader. Then, two novel distributed adaptive control laws are designed by means of linear sliding mode（LSM） as well as nonsingular terminal sliding mode（NTSM）, respectively. one can prove that the tracking consensus can be achieved asymptotically under LSM and the tracking error can converge to a quite small neighborhood of the origin in finite time by NTSM in spite of uncertainties and disturbances. finally, a simulation example is given to verify the effectiveness of the obtained theoretical results.

关键词： multi-agent systems tracking consensus distributed adaptive control sliding mode

A Note of the Interpolating Sequence in Q_(p)∩H^(∞)

在线全文

学校读者我要写书评

暂无评论

Wuhan University Journal of Natural Sciences 2024年第1期29卷 1-6页

作者： ZHoU Jizhen SUN Hejie school of Mathematics and big data Anhui University of Science and TechnologyHuainan 232001AnhuiChina

In this paper,{z_(n)}_(n=1)^(∞)acts as an interpolating sequence for Q_(p)∩H^(∞).An analytic function f is constructed,and f(z_(n))=∑_(j)λ_(j)f_(z_(j))(z_(n))=λ_(n),n=1,2,…for any{λ_(n)}∈l~∞,wheref and{λn}∈l^(∞),where f and f_(zj)belong to Q_(p)∩H^(∞).As a result,the study achieves a comparable outcome for f(p,p-2,s)∩H^(∞).

关键词： Q_(p)space H^(∞)space f(p p-2 s)∩H^(∞) interpolating sequence