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Through MOOCs and social media platforms, users can share, track, and search for the information of their specific interests. Thus, they can make interactive discussions as well as social media learning on multimedia texts and learning materials. This paper proposes a big data analysis technique on learning portfolio to explore how the interaction, unknown correlations, and hidden patterns among learners...
As a special but important scenario, the critical requirement on robust and effective wireless acoustic communication through the pipeline is increased in the applications such as oil exploration and geological exploration. However, due to the complexity of the pipeline environment including strict band limitation, multi reflection and refraction from state-mixed transmission media of liquid, gas...
How to efficiently place virtual machines is an important issue in the cloud data center. Virtual machine placement method based on traditional heuristic algorithm costs long time to reach an optimal allocation so that it is difficult to meet the real production environment. To solve this problem, this paper proposes a virtual machine placement method based on improved simulated annealing algorithm...
Rational function model (RFM), which is composed of 80 rational polynomial coefficients (RPCs), has been widely used to establish a functional relationship between the image space and the object space in photogrammetry and remote sensing. In order to gain precise RPCs, a set of ground control points (GCPs) need to be selected. And in all most applications, many GCPs selected are located in the center...
Construction engineering products have the characteristic of one-time, so high quality is the eternal pursuit of various countries and various areas all over the world. In recent years, frequent accidents are triggered by inferior engineering quality, and the consequences of loss cannot be estimated. So, the construction engineering quality caused the extensive concern of the government, strengthening...
This paper has studied the effects of grating period on the sensitivity of the sub-wavelength Lamellar grating waveguide sensor with TE polarization incidence. Both of the peak wavelength shift and the full wavelength half maximum (FWHM) of the guided mode are investigated. The calculation results show that the smaller period grating layer will induce more guided modes. Comparing the spectrum sensitivity...
The protective techniques of WINZIP files include compressing the original document and encrypting the AES key. If we want to decrypt the WINZIP file, we require very large computing power and techniques of reducing the password space. In this paper, we have developed a GPU-based parallelized computing system to quickly find out the correct password, and the new system can make parallel decryption,...
Low-density parity-check (LDPC) code can provide powerful error correcting performance for NAND flash memory. Different LDPC code rate has different error correcting performance. Moreover, the raw bit error rate of flash memory is very low in the early lifetime. This will generate ECC redundancy that the error correcting performance of LDPC cannot be completely released. We propose a new Switch LDPC...
In this paper, we proposed a novel texture-mapping method for buildings using remote sensing images and digital surface model. For generating better 3D map, boring manually or semi-automatic texture-mapping of buildings is always needed. However, only with remote sensing images and digital surface model, it is difficult to generate ‘sides’ of buildings, and corresponding relation between triangular...
For each person, there exist large unstructured photo collections in personal photo albums. We call these photos Hetero-source images, which imply abundant shape and texture information of the specific face. In this paper, we propose a novel 3D face modeling method combining the normal map of Hetero-source images with the fitting result based on a single image to achieve more accurate 3D shape estimates...
It is an important problem in remote sensing that using limited observing points acquire the maximum quantity of building information. In this paper, a building information acquisition (BIA) model based on Support Vector Machine (SVM) is proposed for quantitative description of the mathematical relationship between the information quantity acquisition and the observing angles, which is optimized to...
Aimed at the difficult segmentation of ultrasonic tumor image with strong speckle noise, low contrast and weak boundaries, a novel method for segmentation of ultrasonic image is proposed. In order to suppress speckle noise and enhance the edge details, the anisotropic diffusion algorithm combined with the Laplacian operator is introduced into ultrasound images, of which the operator is able to discriminate...
How to solve contradictory problems in product family configuration design correctly and effectively has become a hot focus in the adaptable and rapid design areas in recent years. For this purpose, a survey about the theory system, key technologies and perspective of Product Family Extension Configuration Design (PFECD) and its application in the mass customization is reported. The state-of-arts...
Evaluating the process of university students' elearning scientifically is full of academic and practical significance. The thesis constructs an evaluating indicator system on the process of university students' e-learning based on the learning attitude, communication and cooperation as well as resources used. It also establishes a multi-level fuzzy comprehensive evaluating model by applying the fuzzy-math...
Product or model's multi-function or less structures is the main object for adaptable design (AD). Though the circumstance's changing, the product still owns the orienting structure. It demands the product function with more varieties, versatilities, customization and update. For the purpose, a new extension adaptive design approach (EAD) was carried out by design theory and artificial intelligence...
The behavior of bromelain adsorption on the dye- ligand affinity membrane was investigated at 277,298 and 310 K, which was chitosan (CS) coated to decrease the non-specific adsorption of protein. Reactive Blue 4 was immobilized onto the CS-coated nylon membrane as an affinity ligand. In order to examine the rate limiting step of Reactive Blue 4-immobilized composite membrane adsorption, the two adsorption...
Nylon membranes are first hydrolyed with dilute HCl and then treated with chitosan before being used as the affinity carrier. Papain as a ligand has been immobilized on the activated membranes with glutaraldehyde as a crosslinking agent. The factors involving with the activity of immobilized papain, such as concentration of glutaraldehyde, pH, temperature, reaction time, and the amount of added papain...
The application of cellulases in various industries demands highly stable enzymes, able to perform at extreme pH values and temperatures. In this study, the cellulase, which was immobilized on the chitosan-coated magnetic nanoparticles modified with alpha-ketoglutaric acid (alpha-KA-CCMNPs), exhibited a broader pH range of high activity and the loss of the activity of immobilized cellulase was lower...
To evaluate key clients comprehensively and objectively, a general comprehensive evaluation system of key clients is defined based on the analysis of the third party logistics enterprises. Then a formalized expression and basic element model of key client comprehensive evaluation problem is given. Furthermore, a key client comprehensive evaluation approach based on extension theory is presented. It...
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