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Wang D.-X.,Daqing Normal University
Applied Mechanics and Materials | Year: 2014

By using the single-chip microcomputer AT89C52 and the DS18B20 temperature sensor, this paper designed and realized an oil pump temperature monitoring system based on Internet of things. By installing the DS18b20 sensors in front of and behind the oil pump motor bearings; this monitoring system can collect the real-time temperature data of the oil pump bearing. The changed temperature data can be uploaded to the computer or the hand-held terminals by the transmission module when the temperature of the pump bearing changes. Especially, when the temperature is more than the alarm value preset by the system, the system can automatically send alarm signal, such as ring tones and screen flashing, and start the alarm module to warn the staffs to do the relevant work timely. © (2014) Trans Tech Publications, Switzerland.

Liu Y.,Daqing Normal University
Laser Physics Letters | Year: 2013

In LSO host crystal, Yb3+ occupies two different Lu3+ sites and the character makes the spectra of Yb3+:LSO complicated compared with those of Yb3+:YAG. Due to the difference, the model for Yb3+:YAG can not be used directly for Yb3+:LSO. In this letter, on the basis of the spectral information and the energy level diagram, a theoretical model is developed to treat the laser pulse generated from an active CW injected ring cavity with an Yb3+:LSO crystal. Starting from the rate equation, the equation describing the laser pulse is obtained. As a computable model, it also takes into account the pump absorption saturation and the laser reabsorption. For a typical Yb3+ concentration and crystal length, the experimental parameters are chosen by the calculation. © 2013 Astro Ltd.

Sun H.H.,Daqing Normal University
Applied Mechanics and Materials | Year: 2014

In this study, the palm leaves powder was used as adsorbent for the removal of rhodamine B (RhB) from aqueous solutions. The effects of initial RhB concentrations, adsorbent dosage, initial solution pH and contact time on the amount of color removal was investigated. Batch kinetics and isotherm studies were conducted to evaluate the adsorption behavior of the palm leaves powder. TheLangmuir and Freundlich isotherm model were used to describe the equilibria data. Further, the kinetics involved in the sorption process was evaluated at different initial RhB concentrations. © (2014) Trans Tech Publications, Switzerland.

Liu H.-S.,Northeast Normal University | Liu H.-S.,Daqing Normal University | Lan Y.-Q.,Northeast Normal University | Li S.-L.,Northeast Normal University
Crystal Growth and Design | Year: 2010

Two novel metal-organic frameworks [Ni7(H2O) 6L2(O)2](Cl)2(NO3) 2•6(H2O)•(Emim)2 (1) and [Ni 2(H2O)2L]•7(H2O) (2) have been successfully constructed by using ionothermal and hydrothermal synthesis, respectively. Compound 1 represents the new type metal-organic replicate of PoCl2 with the scu net containing an eight-connecting polynuclear cluster and a large four-connecting complex. Compound 2 showing a one-dimensional chain has been separated in a traditional hydrothermal method using similar starting materials. By inspection of the structures of 1 and 2, it is believed that the different reaction conditions play important roles in forming the final structures. In addition, we investigated the optical band gap of compound 1. © 2010 American Chemical Society.

Gao Q.P.,Daqing Normal University
Applied Mechanics and Materials | Year: 2014

This paper designs multi-core and multi-channel physical education (PE) teaching innovation management platform and introduces TIM theory, so as to collect the transmission speed of video signal for different number of nuclei and the number of channels' teaching management platform. It has found from the calculating that, when the nuclear number is 1, and the channel number is 2, the speed of data transmission signal is the lowest, and the theoretical value is 5.6, the measured value is 5.5, namely the theoretical value is consistent with the measured value. When the nuclear number is 4, and the channel number is 8, the speed of data transmission signal is the highest, and the theoretical value is 9.6, the measured value is 9.7, namely the theoretical value also consistent with the measured value. So in the design of PE teaching innovation management platform, it needs to synthetically consider the nuclear number of DSP and the channels number, so as to achieve the effects of optimization design for the teaching management platform. © (2014) Trans Tech Publications, Switzerland.

Sun L.Q.,Daqing Normal University
Advanced Materials Research | Year: 2014

In this study, the surface chemistry of TiO2 and related photochemical reaction process was reported by taking Orange II, an azo dye, as an example. The results revealed that major oxidative species is HO instead of hole, though hole is also an oxidative species in some other conditions. Besides that, this article also analysed the reaction process, which involves adsorption-reaction-desorption, three typical steps. For reactions falling in the category of these three steps, Langmuir-Hinshelwood model fit best, because it deals with the adsorption and chemical reaction, a dual process. © (2014) Trans Tech Publications, Switzerland.

Ma Y.R.,Daqing Normal University
Applied Mechanics and Materials | Year: 2014

Cloud computing is a fast-developing Internet computing paradigm. It includes large numbers of IT resources, forms a large virtual resources pool, and offers the remote Internet users on-demand IT services. The easy, cheap and elastic resources in cloud are pulling increasing attentions of the enterprises and users. It is becoming the attention of the academia, industrial sectors and governments. However, the security problem is confining its popularization and development. © (2014) Trans Tech Publications, Switzerland.

Shao C.K.,Daqing Normal University
Applied Mechanics and Materials | Year: 2014

This paper uses multivariate planning mathematical model to establish sports tourism planning system, and introduces multiple matrix theory, extracts four characteristic values of the tourist traffic, service, security and environment, realizes the multivariate planning of tourism system. This paper uses the MATLAB software to do numerical simulation on proportion and the expected rate of return for the four characteristic values in planning, we get the multivariate distribution nephogram and rendering nephogram, finally use image mosaic technique of MATLAB to synthetize green planning blueprint of sports tourism. It provides the technical reference for the research on city sports tourism planning. © (2014) Trans Tech Publications, Switzerland.

Lin F.,Daqing Normal University
Advanced Materials Research | Year: 2014

To detect black smokers is the hot topic nowadays. The arounding mineral resources is the human wealth, which has extensive researchful significance. The submarine volcanic eruptions can cause thermal plume and the air curtain group. This paper study the acoustic characteristics of the air bubble, and built the simulation model of air curtain group. With pool for experimental platform, we make the formation process of the air curtain, and experiment with acoustic method to detect air curtain. After processing the data, analyze its fluctuation rate to judge the existence of air curtain. To verify feasibility of this method. © (2014) Trans Tech Publications, Switzerland.

Gao Y.,Daqing Normal University
Proceedings of the 2015 27th Chinese Control and Decision Conference, CCDC 2015 | Year: 2015

In this paper, we investigate a two species predator-prey model with dispersal and Holling type II functional response for predators among n patches. Our main purpose is to extend the global stability criteria by Li and Shuai(2010) on a predator-prey model with dispersal for preys among n patches. Firstly, by using the basic reproduction number and uniform persistence theory, we obtain the threshold dynamics of the system, that is, the system is uniformly persistent and there exists at least one coexistence equilibrium if the basic reproduction number is larger than one unit. Secondly, by using the method of constructing Lyapunov functions based on graph-theoretical approach for coupled systems, we derive sufficient conditions that the positive coexistence equilibrium of the coupling model is unique and global asymptotically stable. © 2015 IEEE.

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