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Weighted geometric mean of n-operators with n-parameters
Jung, C.,Lee, H.,Lim, Y.,Yamazaki, T. North Holland [etc.] 2010 Linear algebra and its applications Vol.432 No.6
We shall consider a weighted geometric mean of n-operators with n-parameters. It is based on the geometric mean defined in our previous paper [C. Jung, H. Lee, T. Yamazaki, On a new construction of geometric mean of n-operators, Linear Algebra Appl. 431 (2009) 1477-1488]. Then we shall show that its weights can be obtained by simple forms in the commutative operators case. Some properties of the weighted geometric mean are obtained.
( M. Tamaki ),( T. Ishibashi ),( T. Yamazaki ),( S. Konda ),( K. Kono ),( S. Okada ),( T. Tomita ) 대한슬관절학회 2024 대한슬관절학회지 Vol.36 No.-
Introduction Patient satisfaction is an important outcome of total knee arthroplasty (TKA). However, we cannot predict how and why patients are satisfied or dissatisfied with TKA. The hypothesis of this study was that patient-reported outcomes (PROs) correlate with in vivo kinematics after TKA. Materials and methods One hundred knees were analyzed after TKA. The in vivo kinematics of deep knee bending motion were estimated from single-plane fluoroscopy using a two-to-three-dimensional registration technique. Active knee flexion, femoral rotation and rollback were evaluated. The PROs were obtained after surgery using the 2011 Knee Society Scoring System (KSS), and their relationship with in vivo kinematics was determined. Results The average minimum and maximum flexion were -2.4 ± 7.3° and 113.2 ± 13.6°, respectively. The average femoral rotation was 7.4 ± 3.4°, and the average medial and lateral rollback were 2.4 ± 4.8 mm and 7.2 ± 5.6 mm, respectively. The multiple regression analysis revealed that the maximum flexion angle significantly contributed to symptoms and satisfaction. In addition, lateral rollback was also a significant factor affecting patient satisfaction. Lateral rollback and lateral Anterior-Posterior (AP) position at maximum flexion were correlated with the maximum flexion angle, whereas femoral rotation did not correlate with flexion angles. Conclusions Maximum flexion and lateral rollback are important for better patient satisfaction after TKA. To obtain the maximum flexion angle, it was necessary to perform the normal kinematic pattern with a large amount of lateral rollback.
Togashi, K.,Hagiya, K.,Osawa, T.,Nakanishi, T.,Yamazaki, T.,Nagamine, Y.,Lin, C.Y.,Matsumoto, S.,Aihara, M.,Hayasaka, K. Asian Australasian Association of Animal Productio 2012 Animal Bioscience Vol.25 No.8
We first sought to clarify the effects of discounted rate, survival rate, and lactation persistency as a component trait of the selection index on net merit, defined as the first five lactation milks and herd life (HL) weighted by 1 and 0.389 (currently used in Japan), respectively, in units of genetic standard deviation. Survival rate increased the relative economic importance of later lactation traits and the first five lactation milk yields during the first 120 months from the start of the breeding scheme. In contrast, reliabilities of the estimated breeding value (EBV) in later lactation traits are lower than those of earlier lactation traits. We then sought to clarify the effects of applying single nucleotide polymorphism (SNP) on net merit to improve the reliability of EBV of later lactation traits to maximize their increased economic importance due to increase in survival rate. Net merit, selection accuracy, and HL increased by adding lactation persistency to the selection index whose component traits were only milk yields. Lactation persistency of the second and (especially) third parities contributed to increasing HL while maintaining the first five lactation milk yields compared with the selection index whose only component traits were milk yields. A selection index comprising the first three lactation milk yields and persistency accounted for 99.4% of net merit derived from a selection index whose components were identical to those for net merit. We consider that the selection index comprising the first three lactation milk yields and persistency is a practical method for increasing lifetime milk yield in the absence of data regarding HL. Applying SNP to the second- and third-lactation traits and HL increased net merit and HL by maximizing the increased economic importance of later lactation traits, reducing the effect of first-lactation milk yield on HL (genetic correlation ($r_G$) = -0.006), and by augmenting the effects of the second- and third-lactation milk yields on HL ($r_G$ = 0.118 and 0.257, respectively).
Linear Polarization Measurement of Gamma Rays in 155Gd by Using a Segmented Compton Polarimeter
J.H.Lee,S.Tanaka,T.Shinozuka,M.Fujita,A.Yamazaki,T.Sonoda,Y.K.Kim,J.S.Chai,C.S.Lee,J.Y.Huh,J.Y.Moon,Y.K.Kwon,Y.Gono,T.Fukuchi 한국물리학회 2002 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.40 No.5
A linear polarization measurement for gamma rays has been performed to directly determine the parities for the levels in 155Gd. High-spin states in 155Gd were populated in the 154Sm(,3n )155Gd reaction by using 35-MeV alphas. Linearly polarized gamma rays emitted from oriented states were measured by using a Compton polarimeter which is made of a planar-type germanium crystal and is segmented into 25 cathodes. The linear polarization of the gamma rays was measured by selecting Compton-scattered events red in coincidence between two adjacent cathodes. The sign of the measured linear polarization enabled us to distinguish between electric and magnetic types of gamma-ray transitions. Accordingly, the parities of the high-spin states in 155Gd were directly determined. Our parity assignment is in excellent agreement with a previous one. A linear polarization measurement for gamma rays has been performed to directly determine the parities for the levels in 155Gd. High-spin states in 155Gd were populated in the 154Sm(,3n )155Gd reaction by using 35-MeV alphas. Linearly polarized gamma rays emitted from oriented states were measured by using a Compton polarimeter which is made of a planar-type germanium crystal and is segmented into 25 cathodes. The linear polarization of the gamma rays was measured by selecting Compton-scattered events red in coincidence between two adjacent cathodes. The sign of the measured linear polarization enabled us to distinguish between electric and magnetic types of gamma-ray transitions. Accordingly, the parities of the high-spin states in 155Gd were directly determined. Our parity assignment is in excellent agreement with a previous one.
DEVELOPMENT OF DCT-VEHICLE PERFORMANCE SIMULATOR TO EVALUATE SHIFT FORCE AND TORQUE INTERRUPTION
T. KONO,H. MIYATA,M. URAKI,R. YAMAZAKI 한국자동차공학회 2006 International journal of automotive technology Vol.7 No.3
With the aim of achieving half the regulated value of EURO-3 Emission Regulations, an ultra low emission motorcycle has been developed based on a motorcycle with an 1800 cm3, horizontal opposed 6-cylinder engine. For the fuel supply system, an electronically controlled fuel injection system was applied. For the emission purification system, three-way catalysts, a feedback control system with a LAF (Linear Air-Fuel ratio) sensor, and a secondary air induction system were applied. To reduce CO and HC emissions during cold starting, an early catalyst activation method combining RACV (Rotary Air Control Valve) and retarded ignition timing was applied. After the catalyst activation, air-fuel ratio was controlled to maximize the purification ratio of the catalyst according to vehicle speed. For the air-fuel ratio control system, the LAF sensor was used. Furthermore, fine adjustment by the LAF feedback control reduced torque fluctuation due to the air-fuel ratio change. As a result, smooth ride feeling was maintained. Owing to these technologies, half the regulated value of EURO-3 has been achieved without any negative impact to the large-scaled motorcycles' drivability. This paper presents the developed ultra low emission technologies including the control method using an LAF sensor.