http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Yaochuan Li,Jianxiang Huang,Man Wang,Junwu Liu,Chengyong Wang,Honghai Zhong,Yang Jiang 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.9
Neoteric copper/sintered–carbon (Cu/SC) composites for pantograph sliders were produced with the method of pressure infiltration. The friction and wear behaviors with or without current and mechanical performances of Cu/SC composites showedthat graphite acted dual effects on Cu/SC, that is, with the addition content of graphite, the electrical conductivity of carbonmatrices increased while the mechanical properties decreased. The friction coefficient and the wear rate decreased with theincrease of the graphite content on dry sliding wear test, and the minimum friction coeffient was only 0.096. Meanwhile,the friction coefficient increased first and then decreased with the current increse, while the wear rate just kept increasing. Scanning electron micrographs revealed a grid-like distribution of copper in the Cu/SC composites. Futhermore, throughobservation and analysis, it was found that Cu/SC composites of pantograph sliders were dominated by adhesive wear andcorrosive wear respectively under two different currents of 5 A and 15 A.
Adaptive Consensualization for Lipschitz Nonlinear-type Multi-agent Networks with Fixed Topologies
Tang Zheng,Jianxiang Xi,Mei Yuan,Guangbin Liu 제어·로봇·시스템학회 2018 International Journal of Control, Automation, and Vol.16 No.4
Adaptive consensualization problems for Lipschitz nonlinear-type multi-agent networks with fixed topologies are addressed. By using the state errors of the neighboring agents, an adaptive consensus protocol is proposed to deal with the consensualization problems. To eliminate the impacts of the Lipschitz nonlinear dynamics, the structure property of a transformation matrix and the Laplacian matrix, and the Lipschitz condition are well utilized. In the Lyapunov function, a scaling constant is introduced to eliminate the impacts of eigenvalues of the Laplacian matrix, which are the global information of the whole multi-agent networks. Then, an completely distributed consensualization criterion is presented in terms of the linear matrix inequality. Furthermore, an explicit expression of the consensus function and its initial state of this multi-agent network are presented. In the Final, a numerical example is shown to verify the validity of theoretical results.
Le Wang,Qing Chen,Jianxiang Xi,Guangbin Liu 제어·로봇·시스템학회 2019 International Journal of Control, Automation, and Vol.17 No.5
The current paper studies the guaranteed-performance consensualization for general high-order multiagentsystems with intermittent communications. Firstly, a new consensus protocol is constructed by using only intermittentlocal information, and the corresponding performance function is given to guarantee the consensus regulationperformance among neighboring agents. Then, linear matrix inequality conditions for guaranteed-performanceconsensus and consensualization are respectively provided and a guaranteed-performance cost of multi-agent systemsis determined meanwhile. Furthermore, the whole motion mode of the multi-agent system can be described byderiving a precise expression of the consensus function. If the nominal converge rate is larger than a positive threshold,then multi-agent systems can achieve guaranteed-performance consensus by determining the gain matrix whenintermittent communications are involved, and the performance function is less than the guaranteed-performancecost. Finally, a simulation example is shown to demonstrate the effectiveness of the proposed theorems.
Mengxuan Li,Jinxin Zou,Guangping Guo,Jianxiang Liu,Guicheng Wang 한양대학교 세라믹연구소 2021 Journal of Ceramic Processing Research Vol.22 No.5
The glass cooling rate during molding process has significant effect on the crystallization behavior and structural uniformityof Al2O3-SiO2-Na2O-CaF2 oxyfluoride glass-ceramics. Abaqus Finite Element Analysis indicated that at room temperaturecooling environment, the cooling rate of 8mm thick glass was notably lower than that of 3 mm thick glass. The interiortemperature of 8 mm thick precursor glass was still above 710 oC even after the sample was cooled for 15 s, which caused theformation of “crystal stones” in precursor glass. The microstructure of oxyfluoride glass and glass-ceramics with differentthickness was analyzed by using DTA, XRD, IR and SEM. Since the 8 mm thick glass was cooled slowly, the initial crystalnucleation generated in the interior of glass, mixed crystal phases were formed in the interior after heat treatment, while singleCaF2 crystal phase formed on the surface. On the contrary, there was only uniform CaF2 crystal phase generating in the 3mm thick precursor glass after heat treatment, as a result of high cooling rate during molding process. Besides, the mechanismand ways to optimize the structure uniformity of glass ceramics were also be discussed.
FSHR Gene Mutation and Its Effect on Litter Size in Pigs
Zhang, Shujun,Xiong, Yuanzhu,Den, Changyan,Xiao, Senmu,Xu, Jianxiang,Xia, Yu,Liu, Xiaohua,Wang, Chunfang,Sun, Shulin Asian Australasian Association of Animal Productio 2004 Animal Bioscience Vol.17 No.2
The polymorphism of the locus FSHRB in intron6-Exon7 of FSHR gene was investigated by PCR-RFLPs in Erhualian, Large White and Landrace${\times}$Large White; The association of polymorphism and litter size was analyzed by using SAS. The results showed that 1) the polymorphism of the locus FSHRB was significantly associated with litter size; 2) the total born number (TBN) and number born alive (NBA) of the sows with BB genotype were increased (p<0.05) with additive effects of 1.02-1.42 and 1.04-1.27 pigs per litter, respectively; 3) among the sows with genotype AA, AB or BB, there was an insignificant difference in born weight and weaning weight. This gene may be an effective potential tool used in conjunction with traditional selection methods.