Pub Date : 2020-07-27DOI: 10.1504/ijcsm.2020.10030825
F. Xu, Xiao-tong Wu, Chun-long Zou, Sheng-Huai Wang, Yu-ning Zhong
Step height calibration sample is a high-precision height (depth) standard transfer material for correcting the Z-axis characteristic parameter values of surface structure measuring instruments such as AFM, SEM and white light interferometer. It has the characteristics of accurate value transfer and small size structure. According to the traceability value of VLSI step height standard, step structure calibration samples with nominal height of 8 nm, 18 nm and 44 nm were fabricated by inductively coupled plasma (ICP) etching and lithography, and the height and surface roughness of the step structures are evaluated by AFM. The experimental results show that the standard deviation of the step height calculated by the algorithm is 0.820 nm, 0.770 nm, 1.786 nm, respectively. The upper surface roughness of the step structure was the surface roughness of the SiO2 film. The roughness of the bottom surface was related to the surface quality of SiO2 film, ICP etching process parameters.
{"title":"Fabrication and characterisation of nanostructure step height sample","authors":"F. Xu, Xiao-tong Wu, Chun-long Zou, Sheng-Huai Wang, Yu-ning Zhong","doi":"10.1504/ijcsm.2020.10030825","DOIUrl":"https://doi.org/10.1504/ijcsm.2020.10030825","url":null,"abstract":"Step height calibration sample is a high-precision height (depth) standard transfer material for correcting the Z-axis characteristic parameter values of surface structure measuring instruments such as AFM, SEM and white light interferometer. It has the characteristics of accurate value transfer and small size structure. According to the traceability value of VLSI step height standard, step structure calibration samples with nominal height of 8 nm, 18 nm and 44 nm were fabricated by inductively coupled plasma (ICP) etching and lithography, and the height and surface roughness of the step structures are evaluated by AFM. The experimental results show that the standard deviation of the step height calculated by the algorithm is 0.820 nm, 0.770 nm, 1.786 nm, respectively. The upper surface roughness of the step structure was the surface roughness of the SiO2 film. The roughness of the bottom surface was related to the surface quality of SiO2 film, ICP etching process parameters.","PeriodicalId":45487,"journal":{"name":"International Journal of Computing Science and Mathematics","volume":"12 1","pages":"92-104"},"PeriodicalIF":0.8,"publicationDate":"2020-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66727508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-07-27DOI: 10.1504/ijcsm.2020.10030822
Rakesh Kumar, Allu Swamy Naidu, Ajeet Singh, A. Tentu
While symmetric key cryptosystems utilise single private key at both ends for encryption and decryption purposes and this mentioned scenario gives advantages of better speed-up as compare to public key cryptosystems. Still, security is a challenge while performing compatibly efficient key distribution and secure private data transfer among entities in an untrusted environment. McEliece cryptosystem, designed in 1978, is a public key based cryptosystem whose security is based on some unknown natured error-correcting codes. This paper gives state-of-the-art detailed overview on this cryptosystem, its component-wise algorithmic description and implementation. Various attacks on McEliece cryptosystem are discussed separately. The experimental results employing Goppa codes are also presented in the paper where the simulations are performed on various extension degrees. Based on the simulations performed, we concluded the results along with the various issues faced while implementation.
{"title":"McEliece cryptosystem: simulation and security vulnerabilities","authors":"Rakesh Kumar, Allu Swamy Naidu, Ajeet Singh, A. Tentu","doi":"10.1504/ijcsm.2020.10030822","DOIUrl":"https://doi.org/10.1504/ijcsm.2020.10030822","url":null,"abstract":"While symmetric key cryptosystems utilise single private key at both ends for encryption and decryption purposes and this mentioned scenario gives advantages of better speed-up as compare to public key cryptosystems. Still, security is a challenge while performing compatibly efficient key distribution and secure private data transfer among entities in an untrusted environment. McEliece cryptosystem, designed in 1978, is a public key based cryptosystem whose security is based on some unknown natured error-correcting codes. This paper gives state-of-the-art detailed overview on this cryptosystem, its component-wise algorithmic description and implementation. Various attacks on McEliece cryptosystem are discussed separately. The experimental results employing Goppa codes are also presented in the paper where the simulations are performed on various extension degrees. Based on the simulations performed, we concluded the results along with the various issues faced while implementation.","PeriodicalId":45487,"journal":{"name":"International Journal of Computing Science and Mathematics","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2020-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42655492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-01DOI: 10.1504/ijcsm.2019.10024360
Zhongli Shen, Yuguang Niu, Yi Zuo, Qiyue Xie, Zhisheng Chen
This paper makes a research for the speed control of wind turbine system under multiple operating regimes, which also studied the sleep residual recurrent neural network method in this work. We aim at designing deep residual recurrent neural network robust controllers, which guarantee the existence of the multiple regime system poles in some predefined zone and wind speed precise tracking. Moreover, the feedback gains which guarantee desired speed tracking performance are obtained by solving the Lyapunov stability functions. The results are applied to a directly driven wind energy conversion experiment systems and the numerical experiment, comparing with the existing results, shows the satisfactory performance of the proposed method.
{"title":"Power control of wind energy conversion system under multiple operating regimes with deep residual recurrent neural network: theory and experiment","authors":"Zhongli Shen, Yuguang Niu, Yi Zuo, Qiyue Xie, Zhisheng Chen","doi":"10.1504/ijcsm.2019.10024360","DOIUrl":"https://doi.org/10.1504/ijcsm.2019.10024360","url":null,"abstract":"This paper makes a research for the speed control of wind turbine system under multiple operating regimes, which also studied the sleep residual recurrent neural network method in this work. We aim at designing deep residual recurrent neural network robust controllers, which guarantee the existence of the multiple regime system poles in some predefined zone and wind speed precise tracking. Moreover, the feedback gains which guarantee desired speed tracking performance are obtained by solving the Lyapunov stability functions. The results are applied to a directly driven wind energy conversion experiment systems and the numerical experiment, comparing with the existing results, shows the satisfactory performance of the proposed method.","PeriodicalId":45487,"journal":{"name":"International Journal of Computing Science and Mathematics","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46749762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-03-13DOI: 10.1504/IJCSM.2019.10019869
Wang Shiye, Yu Zhezhou, Yu Xiangchun
More and more attention has been paid to linear-time online action detection and video segmentation, due to wide application in the fields of human-computer interaction, games and surveillance. In this paper we propose a new descriptor which can be adopted for action recognition, online action detection and segmentation. In addition, we propose the improved efficient linear search (improved ELS) whose scheme is modified to solve the problem of the existence of many action classes' maximum subarray sums exceeding their thresholds. Then we evaluated our approach on MSRC-12 and MSR-Action3D datasets. The results show that our descriptor achieves the state-of-the-art results on action recognition and the performance of the improved ELS is much higher than that of the ELS.
{"title":"Real-time online action detection and segmentation using improved efficient linear search","authors":"Wang Shiye, Yu Zhezhou, Yu Xiangchun","doi":"10.1504/IJCSM.2019.10019869","DOIUrl":"https://doi.org/10.1504/IJCSM.2019.10019869","url":null,"abstract":"More and more attention has been paid to linear-time online action detection and video segmentation, due to wide application in the fields of human-computer interaction, games and surveillance. In this paper we propose a new descriptor which can be adopted for action recognition, online action detection and segmentation. In addition, we propose the improved efficient linear search (improved ELS) whose scheme is modified to solve the problem of the existence of many action classes' maximum subarray sums exceeding their thresholds. Then we evaluated our approach on MSRC-12 and MSR-Action3D datasets. The results show that our descriptor achieves the state-of-the-art results on action recognition and the performance of the improved ELS is much higher than that of the ELS.","PeriodicalId":45487,"journal":{"name":"International Journal of Computing Science and Mathematics","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2019-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42012189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-13DOI: 10.1504/IJCSM.2018.10015909
Li Qi, Qi Lili, L. Weiwei, Zhang Zhiqiang
Automatic robots have been extensively employed to inspect steam generator (SG) tubes. Positioning and fixation of robots underneath tube-sheet plates are enabled by tube grippers. In this paper, configuration design and performance analysis of a new tube gripper were carried out. To calculate the gripper's load capacity, numerical analysis was used to establish finite element (FE) model of the gripper. Furthermore, orthogonal experiment and statistical methods combined with FE analysis were adopted to explore the influence on contact between the gripper and the tube's inner wall by manufacturing tolerance. Three factors of dimension and form tolerance were selected in sensitivity analysis. The influencing factors of contact stress were analysed by analysis of variance (ANOVA). Physical prototype experiment results were provided to validate the design rationality. Results of analysis and actual tests proved that the gripper with inelastic fingers exhibited excellent load capacity, superior contact performance and longer service life time.
{"title":"Design and contact analysis of gripper for tube inspection robots","authors":"Li Qi, Qi Lili, L. Weiwei, Zhang Zhiqiang","doi":"10.1504/IJCSM.2018.10015909","DOIUrl":"https://doi.org/10.1504/IJCSM.2018.10015909","url":null,"abstract":"Automatic robots have been extensively employed to inspect steam generator (SG) tubes. Positioning and fixation of robots underneath tube-sheet plates are enabled by tube grippers. In this paper, configuration design and performance analysis of a new tube gripper were carried out. To calculate the gripper's load capacity, numerical analysis was used to establish finite element (FE) model of the gripper. Furthermore, orthogonal experiment and statistical methods combined with FE analysis were adopted to explore the influence on contact between the gripper and the tube's inner wall by manufacturing tolerance. Three factors of dimension and form tolerance were selected in sensitivity analysis. The influencing factors of contact stress were analysed by analysis of variance (ANOVA). Physical prototype experiment results were provided to validate the design rationality. Results of analysis and actual tests proved that the gripper with inelastic fingers exhibited excellent load capacity, superior contact performance and longer service life time.","PeriodicalId":45487,"journal":{"name":"International Journal of Computing Science and Mathematics","volume":"9 1","pages":"340-351"},"PeriodicalIF":0.8,"publicationDate":"2018-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66727438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-07-12DOI: 10.1504/IJCSM.2018.10014228
Wang Jie, Yuan Jiangjun
Genetic algorithm is a very powerful search algorithm that fits for many complex situations. However, it is very time consuming, which limits its usage. Previous work which makes use of multi-core systems to parallelise it performs well and gains much attention. This paper introduces that the load-imbalance problem in parallel genetic algorithm will incur large overhead and will limit the performance. We propose two efficient mechanisms (postponed waiting and work stealing) to achieve fine-grained schedule to solve the problem. Compared with traditional multi-deme parallel genetic algorithm, our high-efficient multi-deme genetic algorithm (HMGA) can achieve an average speedup of 1.36.
{"title":"A high-efficient multi-deme genetic algorithm with better load-balance","authors":"Wang Jie, Yuan Jiangjun","doi":"10.1504/IJCSM.2018.10014228","DOIUrl":"https://doi.org/10.1504/IJCSM.2018.10014228","url":null,"abstract":"Genetic algorithm is a very powerful search algorithm that fits for many complex situations. However, it is very time consuming, which limits its usage. Previous work which makes use of multi-core systems to parallelise it performs well and gains much attention. This paper introduces that the load-imbalance problem in parallel genetic algorithm will incur large overhead and will limit the performance. We propose two efficient mechanisms (postponed waiting and work stealing) to achieve fine-grained schedule to solve the problem. Compared with traditional multi-deme parallel genetic algorithm, our high-efficient multi-deme genetic algorithm (HMGA) can achieve an average speedup of 1.36.","PeriodicalId":45487,"journal":{"name":"International Journal of Computing Science and Mathematics","volume":"9 1","pages":"240-246"},"PeriodicalIF":0.8,"publicationDate":"2018-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47756807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-03-29DOI: 10.1504/IJCSM.2018.10011724
Shan Xiaohang, Ye Biqing, Zhang Li
Amorphous film is an important amorphous material, which has a wide application prospect in the aspects of electronics, mechanics, chemical industry, national defence and so on. The quality of amorphous film substrate has a significant impact in the amorphous film performance. Hydrodynamic suspension polishing is a super-smooth and non-damage polishing method, which is suitable for the processing of amorphous film substrate. The characteristic of disk's flow field is the key factor for influencing the quality of polishing. The movement and distribution of abrasives in flow field is analysed in this paper by high speed photography technology. The distribution of bubbles and abrasives is extracted by MATLAB in the dynamic flow field of hydrodynamic suspension polishing based on fractal and multi-fractal theory. The multi-fractal spectrum is calculated and the association of multi-fractal spectra is analysed. The results show that when buoyancy meets the requirement, the lower the polishing disk rotational speed, the more uniform abrasive distribution. Polishing effect will be better with well continuity of polishing slurry.
{"title":"Analysis of flow field of hydrodynamic suspension polishing disk based on multi-fractal method","authors":"Shan Xiaohang, Ye Biqing, Zhang Li","doi":"10.1504/IJCSM.2018.10011724","DOIUrl":"https://doi.org/10.1504/IJCSM.2018.10011724","url":null,"abstract":"Amorphous film is an important amorphous material, which has a wide application prospect in the aspects of electronics, mechanics, chemical industry, national defence and so on. The quality of amorphous film substrate has a significant impact in the amorphous film performance. Hydrodynamic suspension polishing is a super-smooth and non-damage polishing method, which is suitable for the processing of amorphous film substrate. The characteristic of disk's flow field is the key factor for influencing the quality of polishing. The movement and distribution of abrasives in flow field is analysed in this paper by high speed photography technology. The distribution of bubbles and abrasives is extracted by MATLAB in the dynamic flow field of hydrodynamic suspension polishing based on fractal and multi-fractal theory. The multi-fractal spectrum is calculated and the association of multi-fractal spectra is analysed. The results show that when buoyancy meets the requirement, the lower the polishing disk rotational speed, the more uniform abrasive distribution. Polishing effect will be better with well continuity of polishing slurry.","PeriodicalId":45487,"journal":{"name":"International Journal of Computing Science and Mathematics","volume":"9 1","pages":"13-20"},"PeriodicalIF":0.8,"publicationDate":"2018-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66727420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-03-29DOI: 10.1504/IJCSM.2018.10011727
Yuan Jiangjun, Wang Jie
'Intelligent agriculture' is intelligent agriculture expert system. With the development of mobile device and unmanned aerial vehicle technology, modern agricultural producer has been able to use mobile aggregator to collect real-time data in greenhouses. The sensor nodes around all the greenhouses compose a wireless sensor network. And the mobile aggregator is responsible for the data aggregation for intelligent agriculture. In order to reduce the energy consumption of mobile aggregator, we usually can decrease the distance of the mobile aggregator to collect the data around all the greenhouses. By designing an optimal path through all the greenhouses, the energy consumption of the mobile aggregator can be greatly decreased. In this paper, we use genetic algorithm to solve the optimal path problem. With two experiments, we can get some guidelines when use genetic algorithm to solve the optimal path problem.
{"title":"Optimal path for mobile aggregator in intelligence agriculture","authors":"Yuan Jiangjun, Wang Jie","doi":"10.1504/IJCSM.2018.10011727","DOIUrl":"https://doi.org/10.1504/IJCSM.2018.10011727","url":null,"abstract":"'Intelligent agriculture' is intelligent agriculture expert system. With the development of mobile device and unmanned aerial vehicle technology, modern agricultural producer has been able to use mobile aggregator to collect real-time data in greenhouses. The sensor nodes around all the greenhouses compose a wireless sensor network. And the mobile aggregator is responsible for the data aggregation for intelligent agriculture. In order to reduce the energy consumption of mobile aggregator, we usually can decrease the distance of the mobile aggregator to collect the data around all the greenhouses. By designing an optimal path through all the greenhouses, the energy consumption of the mobile aggregator can be greatly decreased. In this paper, we use genetic algorithm to solve the optimal path problem. With two experiments, we can get some guidelines when use genetic algorithm to solve the optimal path problem.","PeriodicalId":45487,"journal":{"name":"International Journal of Computing Science and Mathematics","volume":"64 1","pages":"21-28"},"PeriodicalIF":0.8,"publicationDate":"2018-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89313844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.1504/IJCSM.2017.10007951
I. Djellit, W. Selmani
{"title":"Bifurcation analysis of H","authors":"I. Djellit, W. Selmani","doi":"10.1504/IJCSM.2017.10007951","DOIUrl":"https://doi.org/10.1504/IJCSM.2017.10007951","url":null,"abstract":"","PeriodicalId":45487,"journal":{"name":"International Journal of Computing Science and Mathematics","volume":"1 1","pages":"1"},"PeriodicalIF":0.8,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66727871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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