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PID Controller Tuning Based on the Covariance Matrix Adaptation Evolution Strategy
Akira Yoshida,Shinji Kanagawa,Yuji Wakasa,Kanya Tanaka,Takuya Akashi 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
This paper deals with a PID control problem with constraints on sensitivity and complementary sensitivity functions, and proposes a PID controller tuning method based on the Covariance Matrix Adaptation Evolution Strategy(CMA-ES). Since the original CMA-ES is developed for an optimization problem without constraints, the PID control problem is transformed into an optimization problem without constraints by using apenalty method. Numerical examples are given to show the effectiveness of the proposed method.
Evaluation of DC Brush-less Motors Using Powder Magnetic Cores
Mori Katsuhiko,Nakayama Ryoji,Kanagawa Kinji 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
We made a high-speed motor and a DC brush-less motor for factory automation (FA) to investigate applicability of powder magnetic core to motor application, and compared those performances with the similar motors having conventional electro magnetic steel core. Permeability and saturated magnetization of powder magnetic core are less than those of elect romagnetic steel core, however output performances of each core motor are almost the same. The FA motor with powder magnetic core using three-dimensional magnetic circuit showed higher torque than the same volume motor with electromag netic steel core.
Triangular shaped type-2 fuzzy numbers: Application to type-2 fuzzy differential equations
Norihiro Someyama,Hiroaki Uesu,Kimiaki Shinkai,Shuya Kanagawa 원광대학교 기초자연과학연구소 2022 ANNALS OF FUZZY MATHEMATICS AND INFORMATICS Vol.24 No.1
It is generally difficult to compute the level cut sets of type-2 fuzzy sets, so type-2 fuzzy sets that are more naturally represented and whose level cut sets can be computed relatively easily are desired. Then, we introduce a new type-2 fuzzy number called Triangular Shaped Type-2 Fuzzy Number in this paper. Moreover, we study calculus for type-2 fuzzy-number-valued functions and solve the problem of a fuzzy differential equation whose initial value is this type-2 fuzzy number.
( Satoko Matsuzaki ),( Shinya Matsuzaki ),( Yutaka Ueda ),( Tomomi Egawa Takata ),( Kazuya Mimura ),( Takeshi Kanagawa ),( Eiichi Morii ),( Tadashi Kimura ) 대한산부인과학회 2014 Obstetrics & Gynecology Science Vol.57 No.5
Placenta previa presents a highest risk to pregnancy, and placenta accreta is the most serious. Placenta accreta requires cesarean delivery and often results in massive obstetric hemorrhage and higher maternal morbidity. Challenges associated with cesarean delivery techniques may contribute to increased maternal blood loss and morbidity rates. Several recent obstetric studies reported the usefulness of transverse uterine fundal incision for managing placenta accreta. We present a case of placenta percreta that was treated by a transverse fundal incision. We successfully avoided cutting through the placenta and helped decrease maternal blood loss. After delivery, the patient underwent a cesarean hysterectomy. Postoperative day 48, she experienced watery discharge and was diagnosed with vaginal fistula. We present our case and review the literature.
Funaba, M.,Saita, J.,Nokubo, T.,Kaneko, O.,Kanagawa, Y.,Yano, H.,Kawashima, R. Asian Australasian Association of Animal Productio 1990 Animal Bioscience Vol.3 No.2
The effect of dietary protein-energy restriction (PER) on the growth of long bone were examined in sheep during growing period and then following a cycle of reproduction. Three months-old female sheep were offered protein-energy restricted feed for 6 months (growing period), thereafter changed to normal nutritional conditions for 8 months (reproduction period). A half of animals in each group took pregnancy, parturition and lactation. The nutritional restriction reduced the growth in bone diameter more than that in bone length. Compensatory growth resulting from the removal of the nutritional restraint strongly occurred in bone diameter, especially the bone cortical width, as compared to bone longitudinal growth. A cycle of reproduction severely decreased the growth in the bone cortical width relative to that in the bone width, and little effect was found on the growth in bone length and bone mass. The depression of bone development by pregnancy and lactation tended to exhibit severer in animals having received normal nutrition than in those having received PER. Bone mineral density was not affected by the nutritional restriction. A cycle of reproduction had an adverse effect on the mineral density between in animals having received normal nutrition and in those having received PER.