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Based on the study of temperature rise during the fast filling of fuel cell vehicles, a new structure of injection nozzle was studied in this paper and the influence of temperature distribution and rise within hydrogen tank was investigated. 2-dimensional models of the type 3, 74L hydrogen tank were established. The simulation was based on the modified standard k-e turbulence model and a real gas...
The failure of energy recovery with descending of regular hydraulic excavator's boom causes heat release problem, disfunction, and accelerated wear. According to this issue, this paper proposes a hydraulic excavator boom potential recovery system based on accumulator-hydraulic motor-generator. The accumulator of the system stores potential energy from construction of boom hydraulic cylinder through...
The Heave compensation system is essential for deep-sea mining to extend the operational weather window and improve the operation safety and efficiency. A novel heave compensation system compositely acted by dynamic vibration absorber combined with accumulator is proposed in the light of 5000m deep-sea poly-metallic mining system of China. The composition and working principles of the heave compensation...
A semi-active control heave compensation system is proposed, according to the requirements of 6000m deep sea poly-metallic mining system. The heave compensation system is acted upon by interacting of dynamic vibration absorber with accumulator. Magneto-rheological damper is act upon actuator to take semi-active control of heave compensation system. The composition and principle of the heave compensation...
The heave compensation system is vital for the deep-sea mining system undergoes excessive vibrations due to irregular wave loads for both normal operating and extreme conditions. To ensure its safety and operation efficiency, a novel active heave compensation system of deep-sea mining based on dynamic vibration absorber was proposed in this paper. The three-degree-of-freedom dynamic models of active...
In recent years high-resolution space borne images have disclosed a large number of new opportunities for medium and large-scale rubber plant mapping. Some traditional algorithms used for hyper spectral remote sensing image classification have some problems such as low computing rate, low accuracy. According to SVM theory, the Rubber plant classification model based on SVM was constructed, by experimenting...
A passive heave compensation system with accumulators is proposed according to the requirements of 6000/h deep sea poly-metallic mining system. The principle of the heave compensation system is described, the main parameters of the system are calculated, a corresponding mathematical model of this system is built. The parameters which affect the performance of the system are simulated and analyzed...
The heave compensation system is of great importance to the safety and operation efficiency of the deep-sea mining system subject to irregular-wave excitation. A novel active-controlled heave compensation system based on dynamic vibration absorber for the deep-sea mining system was proposed in this paper. The three-degree-of-freedom dynamic models of active heave compensation system based on dynamic...
The virtual prototype model for fast simulation analysis of the complete integrated sea trial system for deep ocean mining is built up based on single-body model of the seafloor tracked miner and discrete element model of the pipeline system. Dynamic simulation analysis is performed and investigated taking into account the interactions between each subsystem and corresponding complex ocean environment...
Presently, the main idea of most state-of-the-art conformant planners is to transform a conformant planning problem into a search problem in the space of brief states. However, directly searching a parallel plan solution in the space of brief states has an Achilles' heel: the space of brief states whose elements are sets of possible world states, is always too large. It's alomst impossible for the...
Modern vehicles are increasingly equipped with more sensors which are connected to control units through cables for transmitting crucial real-time sensing data. To reduce the complexity and cost brought to the automotive design and production by the sensor wiring harness, replacing cables with wireless links has been proposed in [1]. With its fine capability of solving multi-path fading and interference...
This paper presents a new level set based solution for automatic medical image segmentation. Study shows that level set methods using image intensity or gradient information alone can not generate satisfying segmentation on some complex organic structures, such as lung bronchia or nodules. We investigate the intensity distribution of these organic structures, and propose a calibrating mechanism to...
This paper presents a new level set based solution for automatic medical image segmentation. Study shows that level set methods using image intensity or gradient information alone can not generate satisfying segmentation on some complex organic structures, such as lung bronchia or nodules. We investigate the intensity distribution of these organic structures, and propose a calibrating mechanism to...
A new method for three dimensional (3D) genus-zero shape classification is proposed. It conformally maps a 3D mesh onto a unit sphere and uses normal vectors to generate a spherical normal image (SNI). Unlike extended Gaussian images which have an ambiguity problem, the SNI is unique for each shape. Spherical harmonics coefficients of SNIs are used as feature vectors and a self-organizing map is adopted...
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