Zhou Ke Jun

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Measles incidence decreased dramatically following widespread use of measles vaccine in China in 1965. To evaluate continued progress in accelerated measles control, data on measles cases reported to the National Notifiable Disease Reporting System during 1991 to 2000 were analyzed. From 1991-1995 to 1996-2000, average annual measles incidence decreased(More)
Satellite with a large solar panel is taken as practical background. The dynamic model of the satellite is established via Lagrange equations. This model includes the orbit motion, the attitude motion and the flexible vibration of the solar panel. The coupling relations between the orbit control force, the attitude and the flexible vibration are studied.(More)
This paper proposed a new two-dimensional Tsallis symmetric cross entropy image threshold Segmentation method. First, the two-dimensional Tsallis symmetric cross entropy is given, and then a fast recursive algorithm is used to search the optimal threshold vector. The algorithms do not ignore the pixel points which fall on the region away from the diagonal(More)
The online estimation of spacecraft center of mass (CM) plays an important role in the attitude and orbit control law design of large variety mass property spacecraft. Based on spacecraft motion equation, the method of using one point three orientations acceleration together with gyro information to estimate CM was discussed, the main error source and(More)
The influence of the orbit control force on the flexible satellite is under consideration. The dynamics model of the satellite with a large solar panel is established via Lagrange equations. The dynamic characters of the system are analyzed. The coupling coefficient matrixes between the motion of the satellite and the flexible vibration are related to the(More)
Facing growing groups of tourists, it's obviously that the traditional manual guides can't meet the needs of each visitor. Through scientific and technological means, an electronic smart guide system based on RFID technology is establishment, Expo visitors can get more information include audio and video about comprehensive equipment, exhibits, galleries by(More)
The effect of treatment with melatonin was investigated in a rat model of Alzheimer's disease (AD) involving a single intra-hippocampal injection of amyloid peptide Aβ1-42. Thirty days after this injection immunohistochemical analysis revealed significant increases of both S-100β and NFκB in cortex and hippocampus of treated animals. Levels of synaptophysin(More)
How to balance each satellite fuel consumption during the period of satellite formation keeping, which can increase the total life span, is of great importance. For the plane circle formation which center was a virtual satellite, a new formation keeping control method was presented considering the fuel equalization constraint. The satellite which remain(More)
  • Zhou Jun, Yang Sheng-qiang, Zhu Bo-nan
  • 2014
This paper has analyzed the existing direct current (DC) system insulation monitoring methods. In view of poor anti-jamming and low sensitivity of existing methods, a new insulation monitoring device is designed based on Fault amplifying method. Under the condition of ensuring system security, the device detection resistors are put into the system by(More)