- 著者
- Xiao Liu Ninghong Guo Wengen Zhu Quan Zhou Menglu Liu Chen Chen Ping Yuan Rong Wan Kui Hong
- 出版者
- International Heart Journal Association
- 雑誌
- International Heart Journal (ISSN:13492365)
- 巻号頁・発行日
- pp.18-470, (Released:2019-06-14)
- 参考文献数
- 56
- 被引用文献数
- 27
In a previous meta-analysis, it was demonstrated that the resting heart rate (RHR) is a potential risk factor for atrial fibrillation (AF). However, the results of that meta-analysis were conflicting, and the relationship between the RHR and AF is still not well established. In the current meta-analysis, our aim is to update evidence with a better statistical model. We searched the Cochrane Library, PubMed, and Embase databases for relevant studies and used a "one-stage approach" with a restricted cubic spline model to summarize the dose-specific relationships between the RHR and AF. Relative risk (RR) was used to measure the effects. In total, 10 studies were included, with a total of 18,630 cases of AF among 431,432 participants. In the dose-response analysis, there was evidence of a nonlinear association between the RHR and the risk of AF (nonlinearity, P < 0.0001), which exhibited a significant J-shaped association between the two factors. An RHR between 68 and 80 bpm had the lowest risk of AF. Among people who had RHR < 70 bpm, the summary RR was 1.09 per 10-RHR decrease (95% confidence interval [CI] = 1.06-1.12; P < 0.001). The results were similar for participants with RHR > 70 bpm (per 10 bpm increase) (RR = 1.06, 95% CI = 1.03-1.08; P < 0.001). Our dose-response meta-analysis revealed a significant J-shaped association between the RHR and AF. Both low RHR and high RHR were associated with an increased risk of AF compared with a modest RHR of 68-80 bpm.
- 著者
- Chen Chen Salike Nimesh Thorbecke Willem
- 出版者
- 早稲田大学アジア太平洋研究センター
- 雑誌
- アジア太平洋討究 (ISSN:1347149X)
- 巻号頁・発行日
- vol.38, pp.24-43, 2020-01-31
- 著者
- Wenfei Tao Peng Wu Chen Chen
- 出版者
- The Institute of Electronics, Information and Communication Engineers
- 雑誌
- IEICE Electronics Express (ISSN:13492543)
- 巻号頁・発行日
- vol.20, no.15, pp.20230121, 2023-08-10 (Released:2023-08-10)
- 参考文献数
- 30
A virtual zero power (VZP) method was used to reduce the power consumption of hybrid magnetic bearings (HMBs) in left ventricular assist devices (LVADs). The mathematics of the HMB system in LVAD was established, and the stability was analyzed with a proportional-derivative (PD) controller. The unbalanced forces on the rotor can be identified by the output voltage of the PD controller, together with the negative stiffness of the permanent magnet, and the rotor can be suspended at a point where the rotor’s reluctant force is at a minimum to lower power consumption. Experiments were conducted to measure the power consumption of the magnetic bearing at different rotational speeds, and different trajectories of the rotor were demonstrated. The results showed HMB using VZP consumed 0.28W averagely at 1000-4000rpm in the LVAD.
- 著者
- Sheng ZHANG Pengfei DU Helin YANG Ran ZHANG Chen CHEN Arokiaswami ALPHONES
- 出版者
- The Institute of Electronics, Information and Communication Engineers
- 雑誌
- IEICE TRANSACTIONS on Communications (ISSN:09168516)
- 巻号頁・発行日
- vol.E106-B, no.2, pp.84-100, 2023-02-01
- 被引用文献数
- 1
In this paper, we report the recent progress in visible light positioning and communication systems using light-emitting diodes (LEDs). Due to the wide deployment of LEDs for indoor illumination, visible light positioning (VLP) and visible light communication (VLC) using existing LEDs fixtures have attracted great attention in recent years. Here, we review our recent works on visible light positioning and communication, including image sensor-based VLP, photodetector-based VLP, integrated VLC and VLP (VLCP) systems, and heterogeneous radio frequency (RF) and VLC (RF/VLC) systems.
- 著者
- 亀井 輝彦 Li Yan Lee Seungpil 大和田 健 Nguyen Hao Nguyen Qui Mokhlesi Nima Hsu Cynthia Li Jason Ramachandra Venky 東谷 政昭 Pham Tuan 渡邉 光恭 本間 充祥 渡辺 慶久 井納 和美 Le Binh Woo Byungki Htoo Khin Tseng Tai-Yuan Pham Long Kim Kwang-ho Chen Yi-Chieh She Min Yuh Jong Chu Alex Chen Chen Puri Ruchi Lin Hung-Szu Chen Yi-Fang Mak William Huynh Jonathan Chan Jim Yang Daniel Shah Grishma Souriraj Pavithra Tadepalli Dinesh Tenugu Suman Gao Ray Popuri Viski Azarbayjani Behdad Madpur Ravindra Lan James Yero Emilio Pan Feng Hong Patrick Kang Jang Yong Moogat Farookh Fong Yupin Cernea Raul Huynh Sharon Trinh Cuong Mofidi Mehrdad Shrivastava Ritu Quader Khandker QUADER Khandker
- 出版者
- 一般社団法人電子情報通信学会
- 雑誌
- 電子情報通信学会技術研究報告. ICD, 集積回路 (ISSN:09135685)
- 巻号頁・発行日
- vol.112, no.15, pp.7-12, 2012-04-16
19nm製造プロセスを用い、シングルチップとしては最大容量となる128Gb 3-bit/cell NAND型フラッシュメモリを開発した。NAND型フラッシュメモリとしては最大のGb/mm^2である、チップサイズ170mm^2を実現した。3-bit per cellでありながら、All Bit-Line(ABL)アーキテクチャ、Air Gap技術、400MbpsトグルモードI/Oインターフェースの採用により、標準BCH ECCにおいても18MB/sの書き込みスループットを実現した。
- 著者
- Chunyan HOU Jinsong WANG Chen CHEN
- 出版者
- The Institute of Electronics, Information and Communication Engineers
- 雑誌
- IEICE Transactions on Information and Systems (ISSN:09168532)
- 巻号頁・発行日
- vol.E101.D, no.2, pp.405-414, 2018-02-01 (Released:2018-02-01)
- 参考文献数
- 25
- 被引用文献数
- 5
System scenarios that derived from system design specification play an important role in the reliability engineering of component-based software systems. Several scenario-based approaches have been proposed to predict the reliability of a system at the design time, most of them adopt flat construction of scenarios, which doesn't conform to software design specifications and is subject to introduce state space explosion problem in the large systems. This paper identifies various challenges related to scenario modeling at the early design stages based on software architecture specification. A novel scenario-based reliability modeling and prediction approach is introduced. The approach adopts hierarchical scenario specification to model software reliability to avoid state space explosion and reduce computational complexity. Finally, the evaluation experiment shows the potential of the approach.