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The optimization of DNA encoding based on chaotic optimization particle swarm algorithm

Journal of Computational and Theoretical Nanoscience 2016年第1期13卷 443-449页

作者： Liu, Yuanyuan Zheng, Xuedong Wang, Bin Zhou, Shihua Zhou, Changjun Key Laboratory of Advanced Design and Intelligent Computing Dalian University Ministry of Education Dalian116622 China

DNA sequence encoding is significant for the improvement of reliability and validity of DNA computing. The hybridization reaction between DNA molecules is the most important and core reaction in the field of DNA computing, because its efficiency and accuracy directly affect the result of DNA computing. In view of the disadvantages of precocious phenomena and local optimum of particle swarm optimization (PSO), chaotic mapping is integrated into the traditional particle swarm optimization, namely chaotic optimization particle swarm algorithm (CPSO). The algorithm not only has the property of chaotic with ergodic, randomness and the sensitivity to the initial value, but also has the fast convergence of the PSO. Thus, we use the chaotic optimization particle swarm algorithm to design the DNA sequences. Compared with other algorithms, the simulation results and security analysis of our DNA sequences are more reliable and stable. At same time, our DNA sequences have low similarity and stable melting temperature. Therefore, it is proved that this method is feasible and has better optimization effect. © 2016 American Scientific Publishers All rights reserved.

关键词： DNA sequences

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Logic gates designed with domain label based on DNA strand displacement

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2016年 9712 LNCS卷 244-255页

作者： Yang, Qianhao Zhou, Changjun Zhang, Qiang Key Laboratory of Advanced Design and Intelligent Computing Dalian University Ministry of Education Dalian116622 China

ISBN: (纸本)9783319409993

The construction of DNA logic gates plays a very significant role in solving NP-complete problems, because DNA computer applied to solving NP-complete problems consists of DNA logic gates. Although AND Gate module and OR Gate module with dual-rail logic constructed by Winfree avoided the instability caused by NOT Gate, the scale of dual-rail logic circuit is two times that of single-rail logic circuit. In this paper, domain t and domain f are applied to representing signal 1 and signal 0 respectively instead of high concentration and low concentration, and AND Gate, OR Gate, NOT Gate with domain label (domain t and f) are constructed. AND Gate, OR Gate, NOT Gate with domain label have good stability and encapsulation, which can be applied to DNA computing in the future. © Springer International Publishing Switzerland 2016.

关键词： DNA

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Wind Tunnel Mach Number Prediction Based on the Pruned Feature Subsets Ensemble Method

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Journal of Aerospace Engineering 2017年第4期30卷 1-8页

作者： Wang, Xiaojun Yuan, Ping Mao, Zhizhong Rui, Wei University Lctr. Key Laboratory of Advanced Design and Intelligent Computing Ministry of Education Dalian Univ. Dalian116622 China Institute of Automatization College of Information Science and Engineering Northeastern Univ. Shenyang110004 China Institute of High Speed Aerodynamics China Aerodynamics Research and Development Center Mianyang Sichuan621000 China

In a wind tunnel, the Mach number in the test section is an important parameter that should be predicted quickly and accurately. In building a Mach number prediction model, large-scale and high-dimensional data is the main issue. To solve the issue, the feature subsets ensemble (FSE) method has been proposed. However, a major drawback of the FSE method is that a large number of submodels are necessarily combined. In this paper, the maximum entropy pruning (MEP) method is proposed to overcome this drawback in the FSE Mach number prediction model. The MEP method refers to finding a subset of submodels that best approximates the entire submodels, while maximizing the quadratic Rényi entropy criterion. Experiments demonstrate that, with much fewer submodels than the FSE and other Mach number models, the MEP-FSE Mach number model can improve the prediction performance (i.e., the generalization), and meet the requirements of the forecasting speed and the root mean square error (less than 0.002). © 2017 American Society of Civil Engineers.

关键词： Wind tunnels

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Dynamic Simulation Analysis of the Flexible Swap Device

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Journal of Donghua University(English Edition) 2015年第2期32卷 300-304页

作者：崔艳波赵腊生张强张建新 Key Laboratory of Advanced Design and Intelligent Computing Dalian University

With the development of space science and technology,the on-orbit servicing technologies of spacecraft get more and more *** to the design criterion of existing spacecraft in orbit module replacement technology,the flexible swap device is designed and the dynamics simulation of institutions by the automatic dynamic analysis of mechanical systems(ADAMS)simulation software is *** the analysis process,this paper studies the effect of collision force of flexible mechanism and provides a basis for the optimization of flexible plug agencies.

关键词： collision swap spacecraft institutions trajectory freedom kinematic criterion constraints replacement

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Sentence Alignment Method Based on Maximum Entropy Model Using Anchor Sentences

Sentence Alignment Method Based on Maximum Entropy Model Usi...

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第十五届全国计算语言学学术会议(CCL2016)暨第四届基于自然标注大数据的自然语言处理国际学术研讨会(NLP-NABD-2016)

作者： Chao Che Wenwen Guo Jianxin Zhang Key Laboratory of Advanced Design and Intelligent Computing(Dalian University) Ministry of EducationDalian

The paper proposes a sentence alignment method based on maximum entropy model using anchor sentences to align ancient and modern Chinese sentences in historical *** method selects the sentence pairs with the same phrases at the beginning or the end of the sentence or with the same time phrases as anchor sentence pairs,which are employed to divide the paragraph into several ***,the sentences in each section are aligned using dynamic programming algorithm according to the entropy calculated by maximum entropy *** maximum entropy model employs improved Chinese co-occurrence character feature,length feature and sentence alignment mode *** Chinese co-occurrence characters feature is improved by giving different weights to characters in different position based on the contribution to align *** the experiment performed on ShiJi,the precision and recall of the proposed method reaches 95.9%and 95.6%respectively,which outperforms other sentence alignment methods significantly.

关键词： anchor sentences maximum entropy model Chinese co-occurrence character sentence alignment

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Facial expression recognition based on DT-CWT and weighted inverse cloud model 15

Facial expression recognition based on DT-CWT and weighted i...

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15th IASTED International Conference on intelligent Systems and Control, ISC 2016

作者： Li, Yanqiu Ren, Fuji Hu, Min Anhui province Key Laboratory of Affective Computing and Advanced Intelligent Machines School of Computer and Information Hefei University of Technology Anhui230009 China

ISBN: (纸本)9780889869837

In order to describe the facial expression images in multi-scale better and weaken the influence of the edge information to recognition result, this paper proposes a method for describing the feature of the facial expression which uses the dual tree complex wavelet transform (DT-CWT) and Uniform Local Gradient Pattern (ULGP). To distinguish the contribution which feature information of different directions play in the recognition, and describe the randomness of the testing image, the cloud model is introduced in this paper. It uses the information entropy of features in different directions as the cloud droplet to obtain the membership degree of the testing image and get the adaptive weighting matrix of it. Moreover, at the recognition stage, combined with BP neural network, we obtain the posterior values which the testing image in different directions belong to different categories. Finally, we utilize the weighted fusion method of decision level to realize the recognition of the testing image. The experimental results on JAFFE database and CK database verify the validity of the feature extracting method in this paper, and the feasibility of using the cloud model to get adaptive weights. The system obtains higher recognition rate ultimately.

关键词： Wavelet transforms

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Axiomatic approaches based on the software trustworthiness measure

Axiomatic approaches based on the software trustworthiness m...

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International Conference on Applied System Innovation, ICASI 2015

作者： Tao, H.W. Chen, Y.X. Pang, J.M. State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou China MoE Engineering Center for Software/Hardware Co-Design Technology and Application East China Normal University Shanghai China State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou China

ISBN: (纸本)9781138028937

Due to the outstanding problems of software trustworthiness, the measurement of software trustworthiness has aroused more and more concern. However, few researches pay attention to using more rigorous approaches in the measurement of software trustworthiness and carrying out the theoretical validation of measures. Axiomatic approaches by formally defining the desirable properties of the measures for software attributes can provide precise, formal, and unambiguous terms for the quantification of software attributes. We once applied axiomatic approaches to the measured software trustworthiness, presented four properties for software trustworthiness measures and gave three measures for software trustworthiness. In this paper, we propose a new property-related user expectation to establish an improved software trustworthiness measure and validate this measure from the theory point of view by proving that it complies with the five properties presented by us. A comparative study shows that this measure is better than the popular software trustworthiness measures in terms of our properties. © 2016 Taylor & Francis Group.

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Normal Stiffness model of bolted joint based on the modified three-dimensional elastic-plastic contact fractal model

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IOP Conference Series: Materials Science and Engineering 2018年第3期382卷

作者： Yunyao Yin Ligang Cai Zhifeng Liu Yongsheng Zhao Qiang Cheng Institute of Advanced Manufacturing and Intelligent Technology Beijing University of Technology Beijing 100124 China Mechanical Industry Key Laboratory of Heavy Machine Tool Digital Design and Testing Beijing University of Technology Beijing 100124 China

Bolted joints have a significant effect on the dynamical behaviour of assembled structures. Accurate contact stiffness model of bolted joint is crucial in predicting the dynamic performance of bolted structures. In this research, a modified three-dimensional fractal model of normal contact stiffness is presented to more accurately predict the dynamic characteristic of a bolted assembly. In the present model, while the contact deformation exceed the critical value the elastic-plastic contact is used to take the place of Hertz elastic contact in the traditional M-B model, and revise the drawback that elastic-plastic contact occurs before elastic contact in existing elastic-plastic fractal models. As the increase of contact force, the plastic deformation of single asperity is considered again, which is omitted in the two type fractal models. An experimental set-up with two T-shaped specimen is designed conducted to verify the efficiency of the proposed model. Comparing with the ZX elastic-plastic fractal model, the present model can predict contact stiffness and dynamic performance more accurately, particularly, while for higher contact loads. The results show that the modified elastic-plastic fractal contact model can be used to more accurately predict the stiffness and dynamic characteristic of bolted structures in the machine tools.

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Motion Planning for Minimizing Base Disturbance of Space Manipulators

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Journal of Donghua University(English Edition) 2015年第2期32卷 252-256页

作者：纪路周东生张强 Key Laboratory of Advanced Design and Intelligent Computing(Dalian University) Ministry of Education

A simulated annealing particle swarm optimization(PSO)algorithm is utilized in this paper to plan the motion of space manipulators with minimized base disturbance,not only its attitude but also its *** space manipulators must meet the Law of Momentum Conservation,any motion of manipulators will disturb the spacecraft which is free-float in the space *** paper tries to limit this effect to the ***,this paper establishes the mathematical model for space manipulators by generalized Jacobian matrix(GJM) and analyzes its inverse kinematics by Theory of ***,a polynomial function of seventh degree is used to parameterize the joint motion and quaternion representation is also used to represent attitude of ***,this paper designs a proper objective function and depicts this algorithm detailedly and ***,the results of numerical simulation are verified by the proposed algorithm.

关键词： utilized kinematics verified disturbance inverse annealing attitude polynomial effector spacecraft

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Pickup Manipulator design and Its Kinematics Simulation

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IOP Conference Series: Earth and Environmental Science 2018年第4期170卷

作者： Zhongdang Zhang Zhaoqiang Zhang Shitai Ma Haibo Zhou Tianjin University of Technology Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control Tianjin 300384 China National Demonstration Center for Experimental Mechanical and electrical Engineering Education (Tianjin University of Technology) Tianjin 300384 China

In order to improve the flexibility of the pickup manipulator and solve the problem of picking up small sports balls in training ground such as golfing, tennis, and table tennis, a 5-DOF pickup manipulator structure is designed. According to the pickup task requirements of the manipulator, through theoretical calculations, the 86HS series stepping motor is selected as the driving motors of the front end joints. Based on this, the stepping motor control system is designed to realize the closed-loop control of the manipulator. Then the manipulator model is built using D-H method, the inverse kinematics solution is calculated, and the analysis of kinematic theory is conducted. Finally, the targeted pickup point is selected to carry out case simulation analysis of the manipulator, the motion law of the manipulator is verified to be reasonable and the task of picking up small sports balls is completed.

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