A High Signal-Integrity PCB-Trace with Embedded Chip Capacitors and Its Design Methodology Using Genetic Algorithm

Author(s):  
Moritoshi Yasunaga ◽  
Shumpei Matsuoka ◽  
Yuya Hoshinor ◽  
Takashi Matsumoto ◽  
Tetsuya Odaira
2019 ◽  
Vol 12 (0) ◽  
pp. E19-007-1-E19-007-9
Author(s):  
Moritoshi Yasunaga ◽  
Shumpei Matsuoka ◽  
Yuya Hoshino ◽  
Takashi Matsumoto ◽  
Tetsuya Odaira

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ke Wang ◽  
Zheming Yang ◽  
Bing Liang ◽  
Wen Ji

Purpose The rapid development of 5G technology brings the expansion of the internet of things (IoT). A large number of devices in the IoT work independently, leading to difficulties in management. This study aims to optimize the member structure of the IoT so the members in it can work more efficiently. Design/methodology/approach In this paper, the authors consider from the perspective of crowd science, combining genetic algorithms and crowd intelligence together to optimize the total intelligence of the IoT. Computing, caching and communication capacity are used as the basis of the intelligence according to the related work, and the device correlation and distance factors are used to measure the improvement level of the intelligence. Finally, they use genetic algorithm to select a collaborative state for the IoT devices. Findings Experimental results demonstrate that the intelligence optimization method in this paper can improve the IoT intelligence level up to ten times than original level. Originality/value This paper is the first study that solves the problem of device collaboration in the IoT scenario based on the scientific background of crowd intelligence. The intelligence optimization method works well in the IoT scenario, and it also has potential in other scenarios of crowd network.


2018 ◽  
Vol 23 (3) ◽  
pp. 298-303 ◽  
Author(s):  
Tetsuya Odaira ◽  
Naoki Yokoshima ◽  
Ikuo Yoshihara ◽  
Moritoshi Yasunaga

Author(s):  
Jeff Chen ◽  
Weiping Li ◽  
Feng Ling

RF System-in-Package (SiP) has become a viable packaging platform, which offers great flexibility to integrate ICs with different processes and different architects. With operating frequency becoming higher and multiple available technologies embedded in one package, the system could fail due to the undesired noise coupling resulted from the close proximity of the components. Therefore, the design methodology with signal integrity (SI), power integrity (PI), and electromagnetic compatibility (EMC) analysis becomes essential to tackle the SiP integration issues. The paper presents a RF SiP design methodology with SI/PI/EMC simulations, which greatly reduces the design time and enables first-pass success.


Kybernetes ◽  
2015 ◽  
Vol 44 (10) ◽  
pp. 1455-1471 ◽  
Author(s):  
Mehran Ashouraie ◽  
Nima Jafari Navimipour

Purpose – Expert Cloud as a new class of Cloud systems provides the knowledge and skills of human resources (HRs) as a service using Cloud concepts. Task scheduling in the Expert Cloud is a vital part that assigns tasks to suitable resources for execution. The purpose of this paper is to propose a method based on genetic algorithm to consider the priority of arriving tasks and the heterogeneity of HRs. Also, to simulate a real world situation, the authors consider the human-based features of resources like trust, reputation and etc. Design/methodology/approach – As it is NP-Complete to schedule tasks to obtain the minimum makespan and the success of genetic algorithm in optimization and NP-Complete problems, the authors used a genetic algorithm to schedule the tasks on HRs in the Expert Cloud. In this method, chromosome or candidate solutions are represented by a vector; fitness function is calculated based on several factors; one point cross-over and swap mutation are also used. Findings – The obtained results demonstrated the efficiency of the proposed algorithm in terms of time complexity, task fail rate and HRs utilization. Originality/value – In this paper the task scheduling issue in the Expert Cloud and improving pervious algorithm are pointed out and the approach to resolve the problem is applied into a practical example.


2012 ◽  
Vol 433-440 ◽  
pp. 4241-4247 ◽  
Author(s):  
Hong Tao Sun ◽  
Yong Shou Dai ◽  
Fang Wang ◽  
Xing Peng

Accurate and effective seismic wavelet estimation has an extreme significance in the seismic data processing of high resolution, high signal-to-noise ratio and high fidelity. The emerging non-liner optimization methods enhance the applied potential for the statistical method of seismic wavelet extraction. Because non-liner optimization algorithms in the seismic wavelet estimation have the defects of low computational efficiency and low precision, Chaos-Genetic Algorithm (CGA) based on the cat mapping is proposed which is applied in the multi-dimensional and multi-modal non-linear optimization. The performance of CGA is firstly verified by four test functions, and then applied to the seismic wavelet estimation. Theoretical analysis and numerical simulation demonstrate that CGA has better convergence speed and convergence performance.


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