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With the rapid development of the Internet of Things (IoT) technologies, IoT devices have been widely deployed. In industrial scenarios, the deployment cost including human operation and time can be increased with the scale of the network because there might be more than thousands of devices that need to be provisioned at the same time. Currently, most systems require human involvement when a newly...
Study of ship deformation accumulation for a long time is of practical significance. According to the initial-boundary value problem of the deformation of the ship, large deviation theory gives the deformation time series convergence theorem, which deduces the convergence rate formula of discrete deformation. The convergence speed of the actual example is attached.
The fluid-solid coupling hydrodynamics parallel model of large ship is built based on VOSS mapping theory. The VOSS algorithm of large ship's wave is given, and the control equation and initial boundary conditions are derived from fluid hydrodynamic theory and solid elastic theory. The numerical results show the VOSS transfer of ship fluid-solid coupling wave is not same as coming see wave.
Ship characteristic length directly affects the development plans of the company. Based on the statistical theory, a data categorical statistical model is build for ship length research. The sub division calculation method is given, and the statistical subsection regression is calculated between ship length, time and GDP. At last, The data of ship characteristic length is forecasted for 2020 year.
It is very important for searcher to predict the lost plane falling rang. The motion equation of lost plane is built with additional mass and random force, and solved by using difference method abd random number, the trajectory is calculated by using integral method, the lost plane falling rang is determined by using probability distribution contour map.
This paper introduces two acceleration methods for the Monte Carlo (MC) simulation of photons on Graphic Processing Units (GPUs). The GPU-based methods for performing MC method enable the use of the model in more complex vegetation canopy. We describe the computation and how it is mapped onto the many parallel computational units on one NVIDIA GT240M graphic card. For a vegetation canopy consisting...
This paper confronts the modern logistics industry, plans the development directions of four industrial chain of modern logistics industry, and provides directional guidance for the development of modern logistics industry, points out the development approach for logistics enterprises in Qinhuangdao.
Bidirectional road is the basic and ordinary scenario of Vehicular Ad hoc Network (VANET) which is an emerging and challenging research applying mobile ad hoc technology to transportation system. According to different forwarding mechanisms in routing protocol of such network, the connections are divided into end-to-end (E2E) type and Store-Carry-Forward (SCF) type. The packet reachability probabilities,...
Because of its multi-resolution analysis performance and great flexibility, wavelet packet transform is suitable for the narrowband interference. It can be realized by quadrate mirror filters, which decomposes the received signal into the n level to obtain a complete binary tree. According to received signal characteristic, we select an appropriate threshold. Compared with the threshold, the value...
Nanometer-sized CdS, as a typical II-VI semiconductor, has unique properties in luminescence and photocatalysis. In the experiment, nano-sized CdS embedded in PVA was prepared by coordination transformation method, and the luminescence property was determined. It could be found that the emission wavelength of the sample will be blue-shifted, and the extent of the blue-shift decreases gradually with...
Fe3O4 magnetofluid was prepared by means of a reduction in situ and coordination transformation method. The infrared spectra showed the existence of complex. Coordination stability constant and coordination number was 1.12times104 and 2.05, respectively. The X-ray diffraction results indicated that all the ferric oxide obtained was Fe3O4. The transmission electron microscope image illustrated the...
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