检索结果-南通市图书馆

Pig target tracking algorithm based on multi-channel color feature fusion

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Agricultural and Biological Engineering 2020年第3期13卷 180-185页

作者： Longqing Sun Shuaihua Chen ting liu Chunhong liu Yan liu College of Information and Electrical Engineering China Agricultural UniversityBeijing 100083China

In the process of tracking the target of the pig,with the change of the size of the tracking target in the video image,the estimated tracking target scale cannot be adaptively updated in real-time,resulting in the low accuracy of the tracking *** this study,a multi-channel color feature adaptive fusion algorithm was proposed,and the target scale of the pig was updated in real-time by utilizing the contour information of the target *** show that the proposed algorithm had a distance precision of 89.7%and an overlap precision of 87.5%,and the average running speed of this algorithm was 50.1 *** robustness of the proposed algorithm in tracking target deformation and scale variation were significantly improved,which satisfies the accuracy and real-time requirements of pig target tracking.

关键词： pig tracking color feature correlation filter ellipse fitting

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

利伐沙班在犬和猫临床应用的研究进展

动物医学进展 2025年第1期46卷 97-102页

作者：王炜江蓝路心怡付诗懿刘亦婷韦力煣俞峰刘波中国农业大学动物医学院北京100193 中国农业大学教学动物医院北京100193

血栓栓塞是犬、猫临床上多种疾病的并发症,可累及动脉或静脉,预后较差。目前兽医临床防治血栓栓塞可用的抗血栓药物种类有限,影响临床诊疗水平,引入新药具有实际意义。利伐沙班是一种新型非维生素K拮抗剂类口服抗凝药物,研究证明其能够... 详细信息

血栓栓塞是犬、猫临床上多种疾病的并发症,可累及动脉或静脉,预后较差。目前兽医临床防治血栓栓塞可用的抗血栓药物种类有限,影响临床诊疗水平,引入新药具有实际意义。利伐沙班是一种新型非维生素K拮抗剂类口服抗凝药物,研究证明其能够特异性抑制活性凝血因子X从而抑制血栓形成。近年来人医领域对利伐沙班的相关临床研究逐渐丰富,涉及单用利伐沙班或使用双通路抑制疗法防治不同类型的动、静脉血栓栓塞,可为其应用于兽医临床提供据。犬、猫临床使用利伐沙班的研究正相继开展,论文就犬、猫血栓栓塞疾病发病情况、防治现状,利伐沙班的药理学特性及其在人医、兽医领域的临床试验研究进展进行综述,以期为兽医临床上利伐沙班的进一步研究提供参考。

关键词：新型口服抗凝药利伐沙班血栓栓塞犬猫

Towards characterizing bug fixes through dependency-level changes in Apache Java open source projects

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2022年第7期65卷 102-120页

作者： Di CUI Lingling FAN Sen CHEN Yuanfang CAI Qinghua ZHENG Yang liu ting liu School of Computer Science and Technology Xi'an Jiaotong University College of Cyber Science Nankai University College of Intelligence and Computing Tianjin University Department of Computer Science Drexel University School of Computer Science and Engineering Nanyang Technological University School of Cyber Science and Engineering Xi'an Jiaotong University

The complexity and diversity of bug fixes require developers to understand bug fixes from multiple perspectives in addition to fine-grained code changes. The dependencies among files in a software system are an important dimension to inform software quality. Recent studies have revealed that most bug-prone files are always architecturally connected with dependencies, and as one of the best practices in the industry,changes in dependencies should be avoided or carefully made during bug fixing. Hence, in this paper, we take the first attempt to understand bug fixes from the dependencies perspective, which can complement existing code change perspectives. Based on this new perspective, we conducted a systematic and comprehensive study on bug fixes collected from 157 Apache open source projects, involving 140456 bug reports and182621 bug fixes in total. Our study results show that a relatively high proportion of bug fixes(30%) introduce dependency-level changes when fixing the corresponding 33% bugs. The bugs, whose fixes introduce dependency-level changes, have a strong correlation with high priority, large fixing churn, long fixing time,frequent bug reopening, and bug inducing. More importantly, patched files with dependency-level changes in their fixes, consume much more maintenance costs compared with those without these changes. We further summarized three representative patch patterns to explain the reasons for the increasing costs. Our study unveils useful findings based on qualitative and quantitative analysis and also provides new insights that might benefit existing bug prediction techniques. We release a large set of benchmarks and also implement a prototype tool to automatically detect dependency-level changes from bug fixes, which can warn developers and remind them to design a better fix.

关键词： empirical software engineering software maintenance software evolution software architecture software design

同方期刊数据库

Selective synthesis of heteroleptic Pd_(2)A_(3)B-cages:modulating size-preference of supramolecular hosts via endo-functionalization

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2024年第12期67卷 4110-4115页

作者： Wen-Tao Dai ting-ting liu Qixia Bai Zhe Zhang Pingshan Wang Wei Lu Qi Zhang Key Laboratory of Green Chemistry and Technology of Ministry of Education College of ChemistrySichuan UniversityChengdu 610064China Institute of Environmental Research at Greater Bay Area Key Laboratory for Water Quality and Conservation of the Pearl River DeltaMinistry of EducationGuangzhou UniversityGuangzhou 510006China

The size complementarity between a host and a guest is a critical prerequisite for selective molecular *** artificial host systems have been designed to achieve size-selective recognition and chemical ***,the inherent challenge lies in the fixed selectivity governed by a size-exclusion mechanism dictated by the host's *** the selectivity necessitates structural modifications of *** of host systems with modifiable sizeselectivity are *** this study,we present an approach to modulating guest-selectivity via endo-functionalization of supramolecular *** Pd_(2)A_(3)B-cages are constructed with a Pd_(2)A_(3)precursor or directly from palladium ions and relevant ***,the simultaneous and selective formation of multiple hetero-cages was achieved by simply mixing PdIIand the free ligands in a one-pot *** fidelity of the assembly process relies on cooperative steric control at the periphery and within the cavity of the hetero-cages,*** central steric group also functions as the endohedral *** of the endohedral groups facilitate facile and modular derivatization of the microenvironment within the cages,enabling the fine-tuning of guest binding affinities as evidenced by titration *** strategy offers a new solution for the development of customized host structures.

关键词： endo-functionalization heteroleptic assemblies host-guest chemistry size-selectivity metal-ligand supramolecular structures

An Improved Whale Optimization Algorithm for Feature Selection

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2020年第1期62卷 337-354页

作者： Wenyan Guo ting liu Fang Dai Peng Xu School of Science Xi’an University of TechnologyXi’an710054China

Whale optimization algorithm(WOA)is a new population-based meta-heuristic *** uses shrinking encircling mechanism,spiral rise,and random learning strategies to update whale’s *** has merit in terms of simple calculation and high computational accuracy,but its convergence speed is slow and it is easy to fall into the local optimal *** order to overcome the shortcomings,this paper integrates adaptive neighborhood and hybrid mutation strategies into whale optimization algorithms,designs the average distance from itself to other whales as an adaptive neighborhood radius,and chooses to learn from the optimal solution in the neighborhood instead of random learning *** hybrid mutation strategy is used to enhance the ability of algorithm to jump out of the local optimal solution.A new whale optimization algorithm(HMNWOA)is *** proposed algorithm inherits the global search capability of the original algorithm,enhances the exploitation ability,improves the quality of the population,and thus improves the convergence speed of the algorithm.A feature selection algorithm based on binary HMNWOA is *** standard datasets from UCI repository test the validity of the proposed algorithm for feature *** experimental results show that HMNWOA is very competitive compared to the other six popular feature selection methods in improving the classification accuracy and reducing the number of features,and ensures that HMNWOA has strong search ability in the search feature space.

关键词： Whale optimization algorithm Filter and Wrapper model K-nearest neighbor method Adaptive neighborhood hybrid mutation

Development of Genomic Microsatellite Multiplex PCR Using Dye-Labeled Universal Primer and Its Validation in Pedigree Analysis of Pacific Oyster(Crassostrea gigas)

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 Ocean University of China 2017年第1期16卷 151-160页

作者： liu ting LI Qi SONG Junlin YU Hong Key Laboratory of Mariculture of Ministry of Education Ocean University of ChinaQingdao 266003P.R.China

There is an increasing requirement for traceability of aquaculture products, both for consumer protection and for food safety. There are high error rates in the conventional traceability systems depending on physical labels. Genetic traceability technique depending on DNA-based tracking system can overcome this problem. Genealogy information is essential for genetic traceability, and microsatellite DNA marker is a good choice for pedigree analysis. As increasing genotyping throughput of microsatellites, microsatellite multiplex PCR has become a fast and cost-effective technique. As a commercially important cultured aquatic species, Pacific oyster Crassostrea gigas has the highest global production. The objective of this study was to develop microsatellite multiplex PCR panels with dye-labeled universal primer for pedigree analysis in C. gigas, and these multiplex PCRs were validated using 12 full-sib families with known pedigrees. Here we developed six informative multiplex PCRs using 18 genomic microsatellites in C. gigas. Each multiplex panel contained a single universal primer M13(-21) used as a tail on each locus-specific forward primer and a single universal primer M13(-21) labeled with fluorophores. The polymorphisms of the markers were moderate, with an average of 10.3 alleles per locus and average polymorphic information content of 0.740. The observed heterozygosity per locus ranged from 0.492 to 0.822. Cervus simulations revealed that the six panels would still be of great value when massive families were analysed. Pedigree analysis of real offspring demonstrated that 100% of the offspring were unambiguously allocated to their parents when two multiplex PCRs were used. The six sets of multiplex PCRs can be an important tool for tracing cultured individuals, population genetic analysis, and selective breeding program in C. gigas.

关键词： Crassostrea gigas traceability microsatellites universal primer multiplex PCR pedigree analysis

Underflow concentration prediction model of deep-cone thickener based on data-driven

在线全文

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2019年第6期26卷 63-72页

作者： Wang Huan liu ting Cao Yuning Wu Aixiang School of Civil and Environmental Engineering University of Science and Technology BeijingBeijing 100083China School of Computer and Communication Engineering University of Science and Technology BeijingBeijing 100083China

The underflow concentration prediction of deep-cone thickener is a difficult problem in paste filling. The existing prediction model only determines the influence of some parameters on the underflow concentration, but lacks a prediction model that comprehensively considers the thickening process and various factors. This paper proposed a model which analyzed the variation of the underflow concentration from a number of influencing factors in the concentrating process. It can accurately predict the underflow concentration. After preprocessing and feature selection of the history data set of the deep-cone thickener, this model uses the eXtreme gradient boosting(XGBOOST) in machine learning to deal with the relationship between the influencing factors and the underflow concentration, so as to achieve a more comprehensive prediction of the underflow concentration of the deep-cone thickener. The experimental results show that the underflow concentration prediction model based on XGBOOST shows a mean absolute error(MAE) of 0.31% and a running time of 1.6 s on the test set constructed in this paper, which fully meet the demand. By comparing the following three classical algorithms: back propagation(BP) neural network, support vector regression(SVR) and linear regression, we further verified the superiority of XGBOOST under the conditions of this study.

关键词： paste filling underflow concentration machine learning XGBOOST prediction model

Dynamics and Stability of Potential Hyper-networked Evolutionary Games

在线全文

学校读者我要写书评

暂无评论

International Journal of Automation and computing 2017年第2期14卷 229-238页

作者： ting liu Yuan-Hua Wang Dai-Zhan Cheng Key Laboratory of Systems and Control Institute of Systems ScienceChinese Academy of Sciences Institute of Control Science and Engineering Shandong University

This paper considers the modeling and convergence of hyper-networked evolutionary games （HNEGs）. In an HNEG the network graph is a hypergraph, which allows the fundamental network game to be a multi-player one. Using semi-tensor product of matrices and the fundamental evolutionary equation, the dynamics of an HNEG is obtained and we extend the results about the networked evolutionary games to show whether an HNEG is potential and how to calculate the potential. Then we propose a new strategy updating rule, called the cascading myopic best response adjustment rule （MBRAR）, and prove that under the cascading MBRAR the strategies of an HNEG will converge to a pure Nash equilibrium. An example is presented and discussed in detail to demonstrate the theoretical and numerical results.

关键词： (Hyper-) Networked evolutionary game (HNEG) potential cascading myopic best response adjustment rule (MBRAR),Nash equilibrium semi-tensor product of matrices.

Therapeutic effects of topical netrin-4 in a corneal acute inflammatory model

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2015年第2期8卷 228-233页

作者： Yun Han Yi Shao ting-ting liu Sang-Ming Li Wei Li Zu-Guo liu Eye Institute of Xiamen University Fujian Provincial Key Laboratory of Ophthalmology and Visual Science Department of Ophthalmology the First Affiliated Hospital of Nanchang University

AIM: To evaluate the therapeutic effect of netrin-4 on the early acute phase of inflammation in the alkali-burned ***: Eye drops containing netrin-4 or phosphate buffered saline(PBS) were administered to a alkali-burn-induced corneal acute inflammatory model four times daily. The clinical evaluations, including fluorescein staining and inflammatory index, were performed on day 1, 4 and 7 using slit lamp *** specimens were collected on day 7 and processed for immunofluorescent staining. The levels of inflammatory mediators in the corneas were determined by real-time polymerase chain reaction(PCR).RESULTS: Exogenous netrin-4 administered on rat ocular surfaces showed more improvements in decreasing fluorescein staining on day 4 and 7, and resolved alkali burn-induced corneal inflammation index on day 7(P ting a potential as an anti-inflammatory agent in the clinical to treat the acute inflammation.

关键词： netrin-4 inflammation alkali burn cornea