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Space web is lightweight membrane or cable net deployable in space. Deployment and stabilization of large space web by spin have gained interest because the rotational inertia forces are in the plane of rotation and the spin rate that determines the magnitude of the web tension can be chosen to meet the mission requirements. Nevertheless, during the development process, without control or inappropriate...
Cyberspace intrusion detection systems for new generation of ship use multisensor data fusion in heterogeneous distributed net. to form cyberspace situational awareness. Project elements of grass root models based multisensor data fusion were brought forward, including IDS based Internet and basal data fusion truss. Model of TCP/IP was used to empolder sensor casing model and model of data-base. Commend...
In this paper the relative-chord context is proposed for shape description in object recognition. The relative-chord is introduced to obtain the affine-invariant feature. The intervals of parallel chords are normalized by vertical direction-chord. Experimental result based on the Columbia University Coil-100 3D database demonstrates the feasibility of the relative-chord context methodology and also...
Three-dimensional diversion structure of open channel is simulated by k-ε two equation model and VOF model, the hydraulic characteristics is obtained including flow pattern, flow field distribution, water surface profile and split ratio and so forth. The flow field of diversion region is strong three-dimensional, the relative turbulence intensity increase as the discharge is increased. When the discharge...
In order to realize coal mining in safety without moving villages, increase coal recovery ratio, solve the conflict of mining and panel relays, the scheme of paste backfill mining under villages in Xiaotun coal mine is executed, and the surface subsidence observation lines on the surface of the mine are established and timely monitored. Based on the results of the surface movement observation, the...
In order to realize high speed and high precision position control of some rocket launcher servo system, aimed at all kinds of uncertainties such as widely changing moment of inertia and load moment, and strong impact moment, super-twisting algorithm is introduced to design speed controller and current controller. In order to guarantee mover speed to track its reference signal strictly when the system...
The angle of break is a key factor that determines the mining damage extent of the surface in a mine, and it is also used to depict the characteristics of the mining subsidence basin. The geological and mining factors that influence the angle of break are fully analyzed. Based on the practical observational data from the ground movement monitoring stations of many mines in China, a neural network...
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