Tiantian Zhang, Ping Zhu, Junjie Lian, Yunchun Liu
{"title":"Stress analysis and optimization of pop package under random vibration loading","authors":"Tiantian Zhang, Ping Zhu, Junjie Lian, Yunchun Liu","doi":"10.1587/elex.20.20230390","DOIUrl":"https://doi.org/10.1587/elex.20.20230390","url":null,"abstract":"The stress analysis of packaging on packaging (POP) under random vibration loading is conducted using the finite element model. The effect of structural parameters on solder joint stresses is analyzed by sensitivity analysis. Stress fitting is performed using the response surface method (RSM), and the optimization module is used to optimi-ze the structural parameters of POP packaging. The results demonstrate a reduction of 0.016 and 0.0031 MPa in upper and lower solder joint stresses, respectively. This optimization of the structural parameters improves the reliability of the electronic packaging structure.","PeriodicalId":50387,"journal":{"name":"Ieice Electronics Express","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136204447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kwon Sang Wook, S. Jeong, Jung Min Lee, Yong-Seo Koo
{"title":"High-reliability LDO regulator with built-in SCR-based ESD protection circuit designed for effective peak voltage reduction","authors":"Kwon Sang Wook, S. Jeong, Jung Min Lee, Yong-Seo Koo","doi":"10.1587/elex.20.20230231","DOIUrl":"https://doi.org/10.1587/elex.20.20230231","url":null,"abstract":"","PeriodicalId":50387,"journal":{"name":"Ieice Electronics Express","volume":"1 1","pages":"20230231"},"PeriodicalIF":0.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67302215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"High-accuracy Low-latency Non-Maximum Suppression Processor for Traffic Object Detection","authors":"Chenbo Yuan, Peng Xu, Gang Chen","doi":"10.1587/elex.20.20230445","DOIUrl":"https://doi.org/10.1587/elex.20.20230445","url":null,"abstract":"As autonomous driving technology advances, the requirements for object detection are becoming increasingly high. Non-maximum suppression (NMS) algorithm, as a key component in traffic object detection algorithms, is an independent post-processing process in the object detection framework. Due to the complexity of real-world road scenarios and high density of detected entities in urban traffic, the number of candidate bounding boxes generated by the neural network is large. Hence, low-precision processors may generate a significant number of redundant target bounding boxes. The excessive output of redundant target bounding boxes not only imposes a workload on subsequent processing but also has the potential to result in non-optimal decision-making. We propose a high-performance NMS processor that can quickly process a large number of candidate boxes without performing sorting of their scores. Also, it has low precision loss computing units and high parallel computing arrays. Combined with algorithm design, it effectively reduces the computational complexity and reduces the inference time of the end-to-end task of the NMS algorithm. Thus, our NMS processor’s speed is comparable to SOTA architecture, and the average accuracy loss is only 0.4% .","PeriodicalId":50387,"journal":{"name":"Ieice Electronics Express","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135159065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Study of sleeve inner diameter to suppress backward heating for microwave surgical energy device","authors":"Tsugumi Nishidate, Kazuyuki Saito","doi":"10.1587/elex.20.20230462","DOIUrl":"https://doi.org/10.1587/elex.20.20230462","url":null,"abstract":"In modern surgery, microwave surgical energy devices are used for hemostasis and anastomosis. However, elongated heating region called backward heating distributes around the feeding line, and potentially causes undesirable heating to non-targeted, normal tissue. In order to suppress the backward heating, we considered use of a sleeve with microwave device. Large sleeve inner diameter is required to use the sleeve effectively. However, small sleeve inner diameter is preferable for use in surgery. In this study, numerical analyses were performed to investigate the optimum sleeve inner diameter. The results indicated over 4 mm inner diameter could suppress the backward heating.","PeriodicalId":50387,"journal":{"name":"Ieice Electronics Express","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135710491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}