2018 4th International Conference on Optimization and Applications (ICOA)最新文献

Sizing of three-stage bipolar transistor amplifier by the genetic algorithm 用遗传算法确定三级双极晶体管放大器的尺寸

2018 4th International Conference on Optimization and Applications (ICOA) Pub Date : 2018-04-26 DOI: 10.1109/ICOA.2018.8370504

Asmae El Beqal, B. Benhala, I. Zorkani

引用次数: 1

Quick response in fast fashion retail: An optimization supply chain responsiveness model 快时尚零售中的快速响应:一个优化的供应链响应模型

2018 4th International Conference on Optimization and Applications (ICOA) Pub Date : 2018-04-26 DOI: 10.1109/ICOA.2018.8370565

Naila Fares, M. Lebbar, N. Sbihi

引用次数: 7

A robust control and design of generator-side converter for a multi-megawatt hydraulic energy conversion system 一种多兆瓦液压能量转换系统的发电机侧变流器鲁棒控制与设计

2018 4th International Conference on Optimization and Applications (ICOA) Pub Date : 2018-04-26 DOI: 10.1109/ICOA.2018.8370516

Chirine Benzazah, Loubna Lazrak, Soukaina El Daoudi, M. A. Lafkih

{"title":"A robust control and design of generator-side converter for a multi-megawatt hydraulic energy conversion system","authors":"Chirine Benzazah, Loubna Lazrak, Soukaina El Daoudi, M. A. Lafkih","doi":"10.1109/ICOA.2018.8370516","DOIUrl":"https://doi.org/10.1109/ICOA.2018.8370516","url":null,"abstract":"This paper focus on an optimal control of a multi pole permanent magnet synchronous generator MP-PMSG direct driven by multi-megawatt hydraulic turbine system connected to the grid. The control strategy is applied to extract the full power output from the hydraulic turbine through a DC/DC boost converter connected to the generator by an uncontrolled three phase rectifier. This control method consists of two cascaded loops, a fast inner loop of DC inductor current, gives the instantaneous duty ratio d to the boost converter switch. The second outer speed loop controls the generator speed to balance well the power flow into the grid. Concerning the control strategy of the DC/AC converter grid side, the three levels NPC inverter controls the DC link voltage and injected active/reactive powers by the (d, q)-axis currents respectively. The reactive power generated by the entire installation is adjusted at zero so that unity power factor is maintained. Simulation results show that the suggested control strategy method and system modeling operate satisfactorily.","PeriodicalId":433166,"journal":{"name":"2018 4th International Conference on Optimization and Applications (ICOA)","volume":"282 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127392277","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}

引用次数: 0

Artificial bee colony technique for a study of the influence of impact of metal thickness on the factor of quality-Q in integrated square spiral inductors 用人工蜂群技术研究了金属厚度对方形螺旋电感质量因子q的影响

2018 4th International Conference on Optimization and Applications (ICOA) Pub Date : 2018-04-26 DOI: 10.1109/ICOA.2018.8370503

Hamid Bouyghf, B. Benhala, A. Raihani

引用次数: 7

Usage and impact of multi-bit flip-flops low power methodology on physical implementation 多比特触发器低功耗方法的使用及其对物理实现的影响

2018 4th International Conference on Optimization and Applications (ICOA) Pub Date : 2018-04-26 DOI: 10.1109/ICOA.2018.8370498

Lekbir Cherif, Mohamed Chentouf, Jalal Benallal, Mohammed Darmi, R. Elgouri, N. Hmina

引用次数: 9

Towards implementing lean construction in the Moroccan construction industry: Survey study 朝向在摩洛哥建筑业实施精益建设:调查研究

2018 4th International Conference on Optimization and Applications (ICOA) Pub Date : 2018-04-26 DOI: 10.1109/ICOA.2018.8370556

M. S. Bajjou, A. Chafi

{"title":"Towards implementing lean construction in the Moroccan construction industry: Survey study","authors":"M. S. Bajjou, A. Chafi","doi":"10.1109/ICOA.2018.8370556","DOIUrl":"https://doi.org/10.1109/ICOA.2018.8370556","url":null,"abstract":"Traditional construction management techniques are criticized by its inability to deliver construction projects on time, with the quality requested by the customer, and without cost overrun. It has become crucial for Moroccan construction practitioners to seek creative approach and to look for new ways of thinking in order to resist to the increasing competition and to survive with market constraints, especially when compared to the significant improvements achieved in the Moroccan manufacturing industry. Lean Construction (LC) is a very effective approach to design production systems for the purpose of reducing waste of time, of materials, and effort as well as generating the maximum possible amount of value. Lean construction has been introduced into the Moroccan construction industry; however, it is still in its infancy. Based on a structured questionnaire survey, this article aims to evaluate the perceptions of the Moroccan construction professionals on the Lean Construction implementation in the Moroccan construction industry. To achieve this objective, a total of 330 responses were collected and then analyzed using Statistical Package for Social Sciences (SPSS V20.0 for Windows). The following conclusions were made, more than half of the respondents (172 professional; 52.1%) think that Lean Construction approach is adapted to any size of Moroccan companies; the respondents agreed that Lean Construction implementation would add positive impacts to the Moroccan construction projects (with an overall mean value of 3.84); LC is a high priority for the Moroccan construction projects (with an overall mean value of 3.84).","PeriodicalId":433166,"journal":{"name":"2018 4th International Conference on Optimization and Applications (ICOA)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115884745","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}

引用次数: 17

Power-aware clock routing in 7nm designs 7nm设计中的功耗感知时钟路由

2018 4th International Conference on Optimization and Applications (ICOA) Pub Date : 2018-04-26 DOI: 10.1109/ICOA.2018.8370505

Mohamed Chentouf, Lekbir Cherif, Zine El Abidine Alaoui Ismaili

{"title":"Power-aware clock routing in 7nm designs","authors":"Mohamed Chentouf, Lekbir Cherif, Zine El Abidine Alaoui Ismaili","doi":"10.1109/ICOA.2018.8370505","DOIUrl":"https://doi.org/10.1109/ICOA.2018.8370505","url":null,"abstract":"The latest advancement in nanotechnology across a different range of industries, and the increased microelectronics market demand for high-performance, high complexity, and low power System on Chips (SoCs) have pushed the Electronic Design Automation (EDA) vendors to explore and to innovate in all stages and aspects of the design development cycle. Nowadays, some IC foundries have enabled the 7nm node for mass production and have seduced many industries to target this technology for their future devices. This market trend has brought many challenges for EDA vendors and physical design and verification specialists since they need to account for many new physical constraints and design rules in order to meet the foundry requirements. On the other side, 7nm node came with new opportunities and advantages that did not exist in earlier design nodes. In this paper, we will use one of these benefits while exploring the low power clock routing problem to achieve better clock power reduction without impacting the circuit timing or area. Our approach takes advantage of the big resistivity differences between SADP and Non-SADP layer to reduce the overall clock parasitic load to be balanced by the clock driver, which will reduce the number of inverters and buffers needed to drive all clock leaf cells, and by consequence, results in an important clock power reduction. By applying our new clock routing approach on a real 7nm testcase using Nitro-SoC place and route tool of Mentor Graphics, we achieved an improvement of 14.7% in clock nets power, 4% in clock cells power, a timing improvement of 1.7% in TNS, and 9.8% in WNS, with better utilization and less total wirelength.","PeriodicalId":433166,"journal":{"name":"2018 4th International Conference on Optimization and Applications (ICOA)","volume":"647 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122696633","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}

引用次数: 3

PSO-MPC control of artificial pancreas 人工胰腺的PSO-MPC控制

2018 4th International Conference on Optimization and Applications (ICOA) Pub Date : 2018-04-26 DOI: 10.1109/ICOA.2018.8370513

M. El Hachimi, A. Ballouk, A. Baghdad

引用次数: 3

A novel modified DTC scheme with speed fuzzy-PI controller 基于速度模糊pi控制器的一种改进的直接转矩控制方案

2018 4th International Conference on Optimization and Applications (ICOA) Pub Date : 2018-04-26 DOI: 10.1109/ICOA.2018.8370507

A. Achalhi, N. Belbounaguia, M. Bezza

引用次数: 1

Investigation of wake interactions effect on wind farm efficiency 尾流相互作用对风电场效率影响的研究

2018 4th International Conference on Optimization and Applications (ICOA) Pub Date : 2018-04-26 DOI: 10.1109/ICOA.2018.8370515

Naima Charhouni, M. Sallaou, K. Mansouri

{"title":"Investigation of wake interactions effect on wind farm efficiency","authors":"Naima Charhouni, M. Sallaou, K. Mansouri","doi":"10.1109/ICOA.2018.8370515","DOIUrl":"https://doi.org/10.1109/ICOA.2018.8370515","url":null,"abstract":"Seeking for an optimal location of wind turbine systems with the aim to minimize the aerodynamic interactions between them and maximize the output power is one of the most complex problems in the stage of wind farm design. In general the wake interferences created by upstream systems influence the quality of power produced by downstream turbines. In this spirit, this paper presents an optimization approach in preliminary design phase that looks for an optimal location of wind turbines that extremize the power generated with low active power losses due to wake effect. Therefore an area with nine similar wind turbines (3 lines and 3 columns) is proposed as a case study. The power losses are quantified using a standard analytical wake model. The optimal arrangement is based on criteria (total power produced and wind velocity deficit) as a function of crucial design variables (inter-space between turbines and rows). Results and discussions show that power production is significantly decreases when turbines operate in low distance where wake interactions level is very important. This degradation can be avoided if downstream turbines are displaced from upstream ones. In addition this study proves that the important effect of low variation of wind direction can be reduced if perpendicular space is large.","PeriodicalId":433166,"journal":{"name":"2018 4th International Conference on Optimization and Applications (ICOA)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132353316","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}

引用次数: 4