HJ-1 satellite system consists of two optical CCD sensors, which can support real-time data for environment monitoring because of its high temporal and spatial resolution, so that there is great potential in water quality monitoring for inland lake. In this article, we analyze the ability of cyanobacteria blooms monitoring using the HJ-1 CCD data. First, the HJ-1 satellite is introduced and the potential ability in cyanobacteria blooms monitoring is discussed. Second, the HJ-1 CCD data and MODIS data are preprocessed and analyzed. Finally, the relative accuracy between the results of HJ-1 CCD and MODIS data are analyzed. The results indicate that the HJ-1 CCD data improve the cyanobacteria blooms monitoring ability in same spatial and temporal resolution.

An algorithm of two stages collision detection is presented for moving objectives in virtual scene. Firstly, AABB bounding box was used to test the intersection of interesting objects in coarse detection stage. Then combining space projection with Z-buffer algorithm, the potential intersecting objects in previous step were tested in precision detection stage, thus we can obtain objects collision data information and complete object collision detection. Finally experimental results show that the algorithm is more efficiency than traditional bounding box detection, the improved technology can realize further accurate collision detection.

To increase the production of active substances, response surface methodology (RSM) was employed. The results showed that the inoculation size, concentrations of MgSO4•7H2O and KNO3 in medium had significant effects on yields of active substances and the final values optimized with RSM were 12.75 % inoculation size, 0.34 g/L MgSO4•7H2O and 0.13 g/L KNO3, respectively, which increased 1.96 fold production of active substances in comparison to the production of initial fermentation conditions.

The experimental and theoretical study on the rapid explosive dispersal process model of a thermobaric explosive has been carried out. Detonation of a thermobaric explosive generates a blast wave followed by a complex supersonic gas-solid fluid, which the additive fuel, aluminum particles, in some cases, might catch up to and penetrate the leading shock front. The developing history of the explosive fireball is analyzed and the complex physical mechanisms are primarily determined, and the influence of the critical parameters such as the mass ratio of explosive and fuels and the fuel properties to dispersal radius and maximum dispersal velocity are estimated. The theoretical expression of maximum dispersal velocity of solid aluminum fuels was deduced and the mathematic expression of explosive dispersal radius with time was deduced. Overall, an excellent agreement is reached between the experimental and theoretical model results.

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