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Aimed at the contradiction between interference regional coverage and interference power loss in partly coherent jamming styles, a new partly coherent jamming style against synthetic aperture radar (SAR) , time-delay inter-pulse jitter repeater jamming is proposed. In the synthetic aperture time, the inter-pulse time delay of this repeater jamming varies randomly in a small time range. The research shows that this repeater jamming can obtain the whole matched processing gains in range dimension and its SAR imaging output is a similar noise swath, covering a part of fast time domain as well as the whole slow time domain. Thus, it is superior to both noise jamming and other interferences which have dismatched jamming parameters. And it can be implemented easily. The theoretic analysis is given and its performance is verified by simulation. [ABSTRACT FROM AUTHOR]

DSC thermal analysis method is employed to evaluate the compatibility of four kinds of energetic triazole ionic salts with some solid propellant main components. The effects of four energetic triazole ionic salts on the combustion properties of glycidyl azide polymer (GAP)propellant are investigated. The results indicate that four kinds of energetic triazole ionic salts have good compatibility with GAP, and nitrocellulose (NC), but they are sensitive with cyclotrimethylene trinitramine (RDX) and nitrocellulose/nitroglycerine (NC+NG) except 3,4,5-triamino-1,2,4-triazolium nitrate (2a). GAP propellant containing containing 1,2,4- triazolium nitrate (1a) has higher burining rate in the range of 12~16 MPa. GAP propellant containing 1,2,3-triazolium nitrate (1b) has higher burning rate in the range of 7~10 MPa. The burning rate pressure exponents for the propellants containing 3,4,5-triamino-1,2,4-triazolium nitrate (2a) and 3,4,5-triamino-1,2,4-triazolium dinitramide (2b) are decreased in the range of 10~16 MPa. [ABSTRACT FROM AUTHOR]

For using visual technology in the process of drug testing, drug mutual adhesion image will bring a lot of difficulties to subsequent feature extraction. For this problem, this paper presented a segmentation method based on the concave point direction line. It mainly made the color image segmentation in advance according to the color distance, then took 4 chain code to different color segmentation images to find all concave points and marked all the concave points. Then it got the direction line according to all concave points and matched the concave points, took the pairing concave points attachment as a parting line. The test results show that the algorithm has a good accuracy and generality. [ABSTRACT FROM AUTHOR]