Entity

Time filter

Source Type

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.


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. Source


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. Source


Zhai Q.-Z.,Changchun University of Science and Technology
Materials Science and Engineering C | Year: 2012

SBA-15 (Santa Barbara Amorphous-15) is a high ordered mesoporous material. It has the advantages of a non-toxic property, good hydrothermal stability and thermal stability, etc. Inside inner surface a lot of silanols exist. Pore diameter size is uniform and pore size distribution is narrow. This structural feature makes SBA-15 have a higher loading drug amount and be able to effectively extend the drug release cycle. In this paper, polyethylene glycol-block-polypropylene glycol-block-polyethylene glycol was used as template and tetraethyl orthosilicate was used as silica source to prepare SBA-15 by hydrothermal synthesis method. Cefalexin was included in SBA-15 and the included cefalexin drug content was 158.72 mg/g. The composite materials were characterized by using chemical analysis, powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), infrared (IR) spectroscopy, and low temperature nitrogen adsorption-desorption. The results showed that cefalexin had been successfully included in host SBA-15 pore channels. Rational analyses of the release processes of cefalexin drug from the pores of SBA-15 to the simulated body fluid, simulated gastric juice and simulated intestinal fluid were made and sustained-release effects of the drug in complex system were studied. The results showed that in simulated body fluid within 1-5 h cefalexin was fast released and the cumulative release reached 50.00% at 5 h. In 15-20 h, the sustained release speed of cefalexin drug in the composite material decreased and the sustained-release cumulative amount reached 99.87% at 20 h. The release of cefalexin was basically complete. In simulated gastric fluid, composite material sustained-release ended at 4 h, the cumulative sustained release ratio reaching 26.10%. In simulated gastric fluid, the sustained-release was complete at 7 h, the cumulative sustained release ratio reaching 32.46%. The composite material of SBA-15 and cefalexin could improve efficiency of the sustained-release of drug and has a very great potential applicable value. © 2012 Elsevier B.V. Source


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. Source


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. Source

Discover hidden collaborations