Thrust tests of a linear synchronous motor(LSM)with its secondary made of coated superconducting coils were conducted via the built prototype over the traditional copper windings.A numerical model of the superconducti...Thrust tests of a linear synchronous motor(LSM)with its secondary made of coated superconducting coils were conducted via the built prototype over the traditional copper windings.A numerical model of the superconducting LSM was made and the measured data of experiment validate its reliability.The nonlinear resistivity of coated superconductor was electromagnetically modeled by resorting to the power law in conjunction with the constitutive relationship of conductor.Based on the numerical model,we carried out a set of transient studies to make a forecast about the superiority of the proposed high temperature superconducting(HTS)LSM,such as magnetic field distribution and the time evolution of thrust together with the speed in different loads and frequencies.The achieved results clearly confirm that the proposed HTS LSM has the advantages to work as a candidate for developing the high-thrust LSM with a large air gap.展开更多
[Objectives]The expression differences of Hoxc13 gene in the skin tissue of Tan sheep at different stages were analyzed. [Methods] qRT-PCR was used to analyze the mRNA expression level of Hoxc13 gene in the skin tissu...[Objectives]The expression differences of Hoxc13 gene in the skin tissue of Tan sheep at different stages were analyzed. [Methods] qRT-PCR was used to analyze the mRNA expression level of Hoxc13 gene in the skin tissue of Tan sheep at different stages(35, 55 d), and the relative quantitative method was used to analyze the expression level. [Results] The content of Hoxc13 gene in the skin tissue of Tan sheep at 55 d was significantly higher than that in the skin tissue at 35 d. Hoxc13 gene was differentially expressed in the skin tissue of Tan sheep lambs at different stages(35, 55 d). [Conclusions] This study provides basic data for further exploration of the growth and development mechanism of Tan sheep.展开更多
Tan sheep industry is a characteristic and superior agricultural industry in Ningxia,and it is also an enriching industry that helps in poverty alleviation and increases farmers’income.The local government has been c...Tan sheep industry is a characteristic and superior agricultural industry in Ningxia,and it is also an enriching industry that helps in poverty alleviation and increases farmers’income.The local government has been committing to building the"Yanchi Tan Sheep"brand and has made remarkable achievements.In order to explore the resource efficiency and quality of Tan sheep industry,the current situations and advantages of brand development,this paper made an empirical research through field investigations.The research was mainly concentrated on breeding scale,industrial integration,brand building,breeding benefits,and policy support.After a comprehensive evaluation,it came up with the recommendation that the Tan sheep industry should take the high-quality,high-end and green development road.展开更多
基金This work was supported in part by the National Natural Science Foundation of China under Grants 51722706,in part by the Sichuan Youth Science&Technology Foundation under Grant 2016JQ0003,in part by the State Key Laboratory of Traction Power under Grant 2015TPL_T04.
文摘Thrust tests of a linear synchronous motor(LSM)with its secondary made of coated superconducting coils were conducted via the built prototype over the traditional copper windings.A numerical model of the superconducting LSM was made and the measured data of experiment validate its reliability.The nonlinear resistivity of coated superconductor was electromagnetically modeled by resorting to the power law in conjunction with the constitutive relationship of conductor.Based on the numerical model,we carried out a set of transient studies to make a forecast about the superiority of the proposed high temperature superconducting(HTS)LSM,such as magnetic field distribution and the time evolution of thrust together with the speed in different loads and frequencies.The achieved results clearly confirm that the proposed HTS LSM has the advantages to work as a candidate for developing the high-thrust LSM with a large air gap.
基金Supported by Study on the Mechanism of DLX3/DLX4 Gene Regulation of Coat Bending in Tan Sheep (2021A0491)Breeding of Mutton and Fur Dual-purpose Tan Sheep Lines (2018NYYZ04)。
文摘[Objectives]The expression differences of Hoxc13 gene in the skin tissue of Tan sheep at different stages were analyzed. [Methods] qRT-PCR was used to analyze the mRNA expression level of Hoxc13 gene in the skin tissue of Tan sheep at different stages(35, 55 d), and the relative quantitative method was used to analyze the expression level. [Results] The content of Hoxc13 gene in the skin tissue of Tan sheep at 55 d was significantly higher than that in the skin tissue at 35 d. Hoxc13 gene was differentially expressed in the skin tissue of Tan sheep lambs at different stages(35, 55 d). [Conclusions] This study provides basic data for further exploration of the growth and development mechanism of Tan sheep.
基金Supported by Special Project for Agricultural Breeding of Ningxia(2018NYYZ0401)Agricultural High Quality Development and Ecological Protection Science and Technology Innovation Demonstration Project of Ningxia(NGSB-2020-12)Scientific and Technological Research Program of Special Project for Agricultural Science and Technology Independent Innovation of Ningxia(NKYZZ-G-19-08)。
文摘Tan sheep industry is a characteristic and superior agricultural industry in Ningxia,and it is also an enriching industry that helps in poverty alleviation and increases farmers’income.The local government has been committing to building the"Yanchi Tan Sheep"brand and has made remarkable achievements.In order to explore the resource efficiency and quality of Tan sheep industry,the current situations and advantages of brand development,this paper made an empirical research through field investigations.The research was mainly concentrated on breeding scale,industrial integration,brand building,breeding benefits,and policy support.After a comprehensive evaluation,it came up with the recommendation that the Tan sheep industry should take the high-quality,high-end and green development road.
