Changchun, China

Changchun University of Science and Technology is a provincial key university, previously known as Changchun Institute of Optics and Fine Mechanics . The university was founded in 1958 in Changchun, Jilin, China.After half a century’s development and construction, Changchun University of Science and Technology has been developed into a multidisciplinary university with opto-electronic technology as its outstanding feature and with the integration of optics, mechanics, electronics, computer science as well as material science as its superiority.Following the educational philosophy of ‘Focusing on Cultivation, Advocating Science’ and the university motto of ‘Virtuous, Learned, truthful, Innovative’, the university is endeavoring to reach the goal of ‘provincially top, nationally advanced, and internationally well-known’.Changchun University of Science and Technology has accepted nearly 1000 international students since 1987. The international students mostly come from over 30 countries such as the United States, Russia, Britain, Canada, Norway, Korea, Sudan, Mongolia, DPRK, Vietnam, Japan, Mali, Kenya and Micronesia. Wikipedia.

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Nie H.,Changchun University of Science and Technology | Nie H.,Maastricht University | Kemp R.,Maastricht University
Applied Energy | Year: 2014

Residential energy consumption in China increased dramatically over the period of 2002-2010. In this paper, we undertake a decomposition analysis of changes in energy use by Chinese households for five energy-using activities: space heating/cooling, cooking, lighting and electric appliances. We investigate to what extent changes in energy use are due to changes from appliances and to change in floor space, population and energy mix. Our decomposition analysis is based on the logarithmic mean Divisia index technique using data from the China statistical yearbook and China energy statistical yearbook in the period of 2002-2010. According to our results, the increase in energy-using appliances is the biggest contributor to the increase of residential energy consumption during 2002-2010 but the effect declines over time, due to energy efficiency improvements in those appliances. The second most important contributor is floor space per capita, which increased with 28%. Of the four factors, population is the most stable factor and energy mix is the least important factor. We predicted electricity use, with the help of regression-based predictions for ownership of appliances and the energy efficiency of appliances. We found that electricity use will continue to rise despite a gradual saturation of demand. © 2014 Elsevier Ltd.

Yong K.-T.,Nanyang Technological University | Law W.-C.,State University of New York at Buffalo | Hu R.,Nanyang Technological University | Ye L.,Chinese PLA General Hospital | And 4 more authors.
Chemical Society Reviews | Year: 2013

Tremendous research efforts have been devoted to fabricating high quality quantum dots (QDs) for applications in biology and medicine. Much of this research was pursued with an ultimate goal of using QDs in clinical applications. However, a great deal of concern has been voiced about the potential hazards of QDs due to their heavy-metal content. Many studies have demonstrated toxicity of various QDs in cell culture studies. However, in a smaller number of studies using small animal models (mice and rats), no abnormal behaviour or tissue damage was noticed over periods of months after the systemic administration of QDs. Nevertheless, the correlation of these results with the potential for negative effects of QD on humans remains unclear. Many urgent questions must be answered before the QDs community moves into the clinical research phase. This review provides an overview of the toxicity assessment of QDs, ranging from cell culture studies to animal models and discusses their findings. Guidelines for using various nonhuman primate models for QD toxicity studies are highlighted. This review article is intended to promote the awareness of current developments of QD applications in biology, the potential toxicity of QDs, and approaches to minimizing toxicity. © 2013 The Royal Society of Chemistry.

Sun L.,Changchun University of Technology | Zhao Z.,Changchun University of Science and Technology | Zhou Y.,CAS Changchun Institute of Applied Chemistry | Liu L.,Changchun University of Technology
Nanoscale | Year: 2012

Owing to their extensive practical applications and fundamental importance, the controllable synthesis of well-faceted anatase TiO 2 crystal with high percentage of reactive facets has attracted increasing attention. Here, nano-sized anatase TiO 2 sheets mainly dominated by {001} facets had been prepared on graphene sheets by using a facile solvothermal synthetic route. The percentage of {001} facets in TiO 2 nanosheets was calculated to be ca. 64%. The morphologies, structural properties, growth procedures and photocatalytic activities of the resultant TiO 2/graphene nanocomposites were investigated. In comparison with commercial P25 and pure TiO 2 nanosheets, the composite exhibited significant improvement in photocatalytic degradation of the azo dye Rhodamine B under visible light irradiation. The enhancement of photocatalytic activity and stability was attributed to the effective charge anti-recombination of graphene and the high catalytic activity of {001} facets. © 2012 The Royal Society of Chemistry.

Xu H.,CAS Changchun Institute of Applied Chemistry | Liu P.-T.,Changchun University of Science and Technology | Li Y.-H.,Changchun University of Science and Technology | Han F.-S.,Dalian University of Technology
Organic Letters | Year: 2013

An unprecedented protocol for the copper-mediated direct cyanation of aryl C-H by employing 2,2′-azobisisobutyronitrile (AIBN) as a free radical "CN" source is presented. The protocol not only provides a more efficient pathway for the synthesis of aryl nitriles in terms of the yields and the loading amount of copper salts but also, more importantly, represents a novel strategy for aryl C-H cyanation via a CN free-radical mechanism as compared to the CN anion-participating protocols often reported. © 2013 American Chemical Society.

Chen C.,Changchun University of Science and Technology | Yang H.,Changchun University of Science and Technology
Optics Letters | Year: 2013

The temporal spectrum of beam wander is formulated by considering a Gaussian Schell-model beam passing through atmospheric turbulence with a finite outer scale. Two simpler asymptotic formulas for the temporal spectrum of beam wander within the high- and low-frequency ranges are derived, respectively. Based on the formulations, the effects of the initial partial coherence of the beam, finite outer scale of turbulence, initial beam radius, and initial phase front radius of curvature on the temporal spectrum of beam wander are analyzed by numerical examples. © 2013 Optical Society of America.

Zhang Y.,Changchun University of Science and Technology
Guangxue Jingmi Gongcheng/Optics and Precision Engineering | Year: 2011

The relationship between the vibration of a space camera and its Modulate Transfer Function (MTF) degeneration is investigated. A suitable limitation for a satellite platform is developed through this research. Mathematical modeling of a vibrating MTF is calculated based on a vibration moment method. The MTF curve can be deduced from the vibration functions or curves. The vibrating MTF calculations uses Graphic User Interface (GUI) to develop an software for some space cameras. MTF values under sinusoidal vibrations contain random noise and are calculated with different amplitudes and frequencies. Requirements of the satellite platform vibration is that the angle amplitude of vibration must be less than 0.05″, and the vibration frequency should not be more than 200 Hz. MTF degeneration caused by random vibration is analyzed by simulation to relate image quality degeneration with MTF vibration. Image analysis for the MTF shows good agreements with the MTF calculated by the vibration model.

Xue C.,Changchun University of Science and Technology | Cui Q.,Changchun University of Science and Technology
Optics Letters | Year: 2010

What we believe to be a new method for designing multilayer diffractive optical elements (MLDOEs) for wideband with consideration of polychromatic integral diffraction efficiency (PIDE) is presented. The benefit of this method is that the maximum PIDE over the entire waveband for MLDOEs can be obtained. The design process and simulation of the MLDOEs with regard to an example for visible waveband are described, and the comparison of diffraction efficiencies of the MLDOEs for different choices of design wavelengths with different methods is given. © 2010 Optical Society of America.

Wei W.,CAS Changchun Institute of Applied Chemistry | Wei W.,Changchun University of Science and Technology | Chen W.,CAS Changchun Institute of Applied Chemistry
Journal of Power Sources | Year: 2012

Well-dispersed Pd nanoparticles supported on carbon nanodots are synthesized successfully with a facile and green method without any additional surfactant and reductant. The synthesized Pd-C hybrid nanoparticles provide high electrical conductivity and non-blocked active surfaces for organic molecular fuels oxidation. Compared to the commercial Pd/C catalysts, the present Pd-C hybrid nanocomposites exhibit more negative onset potential and much higher current density for methanol oxidation in alkaline media. The excellent electrocatalytic performance displayed in the electrochemical measurements indicates that such "naked" Pd nanoparticles have potential applications as promising anode catalysts in alkaline fuel cells. © 2012 Elsevier B.V. All rights reserved.

Zhai Q.-Z.,Changchun University of Science and Technology
Journal of Microencapsulation | Year: 2013

This article used MCM-41 as a carrier for the assembly of propranolol hydrochloride by the impregnation method. By means of chemical analysis, powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectroscopy and low-temperature N2 adsorption-desorption at 77 K, the characterization was made for the prepared materials. The propranolol hydrochloride guest assembly capacity was 316.20 ± 0.31 mg/g (drug/MCM-41). Powder XRD test results indicated that during the process of incorporation, the frameworks of the MCM-41 were not destroyed and the crystalline degrees of the host-guest nanocomposite materials prepared still remained highly ordered. Characterization by SEM and TEM showed that the composite material presented spherical particle and the average particle size of composite material was 186 nm. FT-IR spectra showed that the MCM-41 framework existed well in the (MCM-41)-propranolol hydrochloride composite. Low-temperature nitrogen adsorption-desorption results at 77 K showed that the guest partially occupied the channels of the molecular sieves. Results of the release of the prepared composite drug in simulated body fluid indicated that the drug can release up to 32 h and its maximum released amount was 99.20 ± 0.11%. In the simulated gastric juice release pattern of drug, the maximum time for the drug release was discovered to be 6 h and the maximum cumulative released amount of propranolol hydrochloride was 45.13 ± 0.23%. The drug sustained-release time was 10 h in simulated intestinal fluid and the maximum cumulative released amount was 62.05 ± 0.13%. The prepared MCM-41 is a well-controlled drug delivery carrier. © 2013 Informa UK Ltd All rights reserved.

Cong H.-F.,Changchun University of Science and Technology
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2014

This paper reports an advanced Czerny-Turner optical structure which is used for the application in imaging spectrometers. To obtain the excellent imaging quality, a cylindrical lens with a wedge angle is used between the focusing mirror and the imaging plane to remove astigmatism in broadband. It makes the advanced optical system presents high resolution over the full bandwidth and decreases the cost. An example of the imaging spectrometer in the waveband of 260nm-520nm has been designed to prove our theory. It yields the excellent modulation transfer functions (MTF) of all fields of view which are more than 0.75 over the broadband under the required Nyquist frequency (20lp/mm). © 2014 SPIE.

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