Chongqing University, Chongqing University of Science and Technology | Date: 2016-09-22
A method of using a device for conducting a vascular hemodynamic bionic cell experiment is provided, the method comprises: firstly, experiment preparation; and secondly, experiment operation, namely, switching on a peristaltic pump, pumping a circulation liquid from a collection bottle into an independently corresponding shunting chamber of a corresponding shunting bottle through a collection bottle sampling tube of an independent chamber of a collection bottle, after shunting by the shunting chamber of the shunting bottle, the circulation liquid flowing out of a branch shunting tube flows to a corresponding flow chamber on the 1-3 flow chamber platforms placed side by side, and then converging the circulation liquid to a corresponding independent chamber of the collection bottle through respective sampling tubes of the flow chamber platforms. The method provided by the present disclosure has the technical characteristics of strong practicability and low manufacturing cost, and can perform a vascular hemodynamic bionic cell experiment under multiple conditions with multiple parameters when used in combination with different models of shunting bottles and flow chamber platforms.
He Y.,Chongqing University of Science and Technology
Systems and Control Letters | Year: 2017
We analyze the partial exact controllability problem for wave equations. The goal is to drive part of the solution to a destination at a given time. The main results are proved by employing the classical theory of propagation of singularities of wave equations and the compact uniqueness argument. © 2017 Elsevier B.V.
Chen S.,Chongqing University of Science and Technology |
Kar T.,Utah State University
International Journal of Electrochemical Science | Year: 2012
The relationships between corrosion inhibition performance of four kinds of Schiff base inhibitors and their molecular electronic properties have been studied by quantum chemistry method at the level of DFT/B3LYP with the 6-31+G (d, p) base sets. The relationships between the corrosion inhibitor efficiency (IE) and the result of calculation are discussed using linear regression analysis to determine the most effective parameter on inhibition efficiency, and the regression equations find that the corrosion inhibition performances of these inhibitors have a good linear relationship to total charge of -CH=N- group. In the mean time, the study of the interaction between inhibitors and Al(100) surface shows there are some electrons transferred from inhibitors to the surface, so after adsorption the inhibitor cannot capture electronics from Al and lead corrosion, and it could play a protective effect on the metal surface. Finally, this research might provide a theoretical inhibition performance prediction approach for new homologous inhibitors. © 2012 by ESG.
Peng X.,Chongqing University of Science and Technology
2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011 - Proceedings | Year: 2011
Three sub-models of heat transfer across wall in network model of fire are analyzed. The software predictions with the three methods are compared with data of Japan one another by illustration. It shows that for three-node simple building, Both of half-infinite heat transfer sub-model and finite heat transfer sub-model agree well with the data of Japan, half-infinite heat transfer sub-model has a temperature deviation of less than 5% with finite heat transfer sub-model, While the method of heat insulation more than 40%. © 2011 IEEE.
Tang X.,Chongqing University of Science and Technology
Surface and Coatings Technology | Year: 2013
A simple strategy of combining in-situ reaction with microemulsion is used to prepare a crack-free TiO2 thin film with the nano-particles self-assembling into a mesoporous network. The particle shape and size are controlled by the reverse micelles in the microemulsion. In-situ growth of the TiO2 nano-particles prevents the film from cracking by reducing the build-up of capillary stress during the drying process. SEM images indicate that the in-situ TiO2 film is composed of interconnected nano-particles with a size of several tens of nanometers and does not crack macroscopically even when the film thickness is beyond 50μm. © 2013 Elsevier B.V.
Gu X.-H.,Chongqing University of Science and Technology
Tien Tzu Hsueh Pao/Acta Electronica Sinica | Year: 2013
This paper proposed a visual perception and edge preserving illumination invariant face recognition method, which on one hand employs a visual perception based image gradient to replace the image special gradient to make the method be more consistent with the human visual system, and on the other hand, proposes a novel diffusion equation to overcome the edge sharpening problem. The novel method can preserve the image edge and meanwhile can eliminate the halo effect and spot effect to some extent. Experimental results on EYaleB and CMU PIE databases show that the proposed method outperforms other compared methods, which illustrates the effectiveness of the proposed method.
Tang L.,Chongqing University of Science and Technology
Mathematical Problems in Engineering | Year: 2014
The fuzzy C means clustering algorithm with spatial constraint (FCMS) is effective for image segmentation. However, it lacks essential smoothing constraints to the cluster boundaries and enough robustness to the noise. Samson et al. proposed a variational level set model for image clustering segmentation, which can get the smooth cluster boundaries and closed cluster regions due to the use of level set scheme. However it is very sensitive to the noise since it is actually a hard C means clustering model. In this paper, based on Samson's work, we propose a new variational level set model combined with FCMS for image clustering segmentation. Compared with FCMS clustering, the proposed model can get smooth cluster boundaries and closed cluster regions due to the use of level set scheme. In addition, a block-based energy is incorporated into the energy functional, which enables the proposed model to be more robust to the noise than FCMS clustering and Samson's model. Some experiments on the synthetic and real images are performed to assess the performance of the proposed model. Compared with some classical image segmentation models, the proposed model has a better performance for the images contaminated by different noise levels. © 2014 Liming Tang.
Ren Z.,Chongqing University of Science and Technology
Mathematical Problems in Engineering | Year: 2014
We use variational level set method and transition region extraction techniques to achieve image segmentation task. The proposed scheme is done by two steps. We first develop a novel algorithm to extract transition region based on the morphological gradient. After this, we integrate the transition region into a variational level set framework and develop a novel geometric active contour model, which include an external energy based on transition region and fractional order edge indicator function. The external energy is used to drive the zero level set toward the desired image features, such as object boundaries. Due to this external energy, the proposed model allows for more flexible initialization. The fractional order edge indicator function is incorporated into the length regularization term to diminish the influence of noise. Moreover, internal energy is added into the proposed model to penalize the deviation of the level set function from a signed distance function. The results evolution of the level set function is the gradient flow that minimizes the overall energy functional. The proposed model has been applied to both synthetic and real images with promising results. © 2014 Zemin Ren.
Jiang Y.,Chongqing University of Science and Technology |
Chen M.,Chongqing University of Science and Technology
Energy Procedia | Year: 2012
Researches and industrialization of pipeline steel fatigue crack propagation are summarized, especially the X60 and X70 pipeline steel after mechanical damage and in the synthetic soil solution. The results show that the fatigue crack propagation of the pipeline steel has the similar law after mechanical damage or in the synthetic soil solution. It is very clearly that the fatigue crack propagation is deeply depending on the ΔK, and there are all have threshold characters. The mechanical damage and the synthetic soil solution can increase the fatigue crack propagation rate, decrease the fatigue crack propagation threshold ΔKth, accelerate crack propagation rate and shorten the service life of the pipe. © 2011 Published by Elsevier Ltd.
Chongqing University of Science and Technology | Date: 2011-08-29
It is disclosed a two-section type waste incinerator, wherein secondary air supplying holes (27e) are provided on a front arch and a back arch of an incinerator body (27), and an ignition combustion-supporting hole (27f) is provided on the back arch of the incinerator body. Grate inside the incinerator body (27) is divided into two sections from a high point to a low point, i.e., an upper section and a lower section, the upper section is a pusher type section (6) and the lower section is a reverse pusher type section (7), and an independent primary air chamber (26) is provided under each section. All heads of the grate-pieces (3, 5) on the pusher type section (6) face toward a low point of the grate, and all heads of the grate-pieces (3, 5) on the reverse pusher type section (7) face toward a high point of the grate. Each movable beam (4) on the same section of the grate is equipped with left and right levers (24, 25) disposed side by side, the left and right levers (24, 25) are supported by a supporting roller device respectively and are connected to the movable beam (4) to form a lever frame, and an end of the lever frame is connected to a front swing arm driving mechanism or a lateral swing arm driving mechanism or a front straight driving mechanism. The incinerator of the present invention can realize sufficient dryness, complete combustion and burnout of the whole waste layer, and ensure the desired waste incineration effect and ignition loss.