Changchun University is a multi-disciplinary university in Changchun, Jilin. It includes three campuses all together covering 1,129,000 squaremeters. Established in 1946, Changchun University has trained more than 40,000 undergraduate students. The university consists of 17 institutions, offers 46 undergraduate degree courses, and represents over 13,000 students. There are over 707 instructors in the university, including 110 professors and 318 associate professors. At present, Changchun University has three national-level science research centers, one provincial key academic discipline, one provincial key science lab, and two provincial key humanities and social science research bases. The university's education scope covers philosophy, economics, law, education, literature, history, science, engineering, agriculture, medicine, and management. Wikipedia.
Jiang X.,Changchun University
Advanced Materials Research | Year: 2011
The article is inspired by the exterior shape of the electric fan, which analyzed the extensive developing design space of it. And it also combined the design problem of the existing electric fan in the art function and using function. A multi-function electric fan which simulated the shape of Beijing Olympic auspicious cloud torch has been designed. It discusses the design purpose, the requirements of the electric fan, the designing process, the function design and form design, and the function design is mainly describe the operating principle and a variety of using function. The multi -function including the basic function of the electric fan and the air moistening function, automatic temperature measurement function, automatic ventilation control function, automatic time display function, fire alarm function and music function etc. While shape design pointed out the artistic quality, man-machine quality and analyzed its feasibility. On that basis, it made a conclusion. © (2011) Trans Tech Publications.
Liu Y.,Changchun University
ICCMS 2010 - 2010 International Conference on Computer Modeling and Simulation | Year: 2010
with the rapid de velopment of networks and information technology, the endless information has paid more and more attention by people. While in the pursuit of information with high speed, the analysis and mining of the information and rules hidden deep in the data are also paid more emphasis. Data mining technology is to organize and analyze the data, which can extract and discover knowledge from the mass of data, so how to apply the data mining technology into enterprise stock management is the focus of this topic studied. In this paper, combining with data mining theory, Apriori algorithm in association rule mining algorithm is described in detail, the algorithm implementation process is illustrated, and the improved methods of the algorithm are discussed. © 2010 IEEE.
Li Z.H.,Changchun University
Zhongguo gu shang = China journal of orthopaedics and traumatology | Year: 2011
To study reverse effect of the oxidative damage on cartilage cells of velvet antler polypeptides (VAPS), and to investigate the main mechanism of VAPS to protect cartilage cells through antioxidant. Fifteen Japanese white rabbits of 5-month-old were selected in this study. Animal model was established by method of Hulth osteoarthritis animal model. The anterior and posterior cruciate ligament and medial collateral ligament were cut off and medial meniscus were cut, articular cartilage cell cultured in vitro. Cells in the sham operation group was the normal control group, osteoarthritis cartilage cells in the model groups were added VAPS 6.25, 12.5, 25 microg/ml respectively. A group of animals were sacrificed every week form the ninth weeks(two months) and the cartilage cells were isolated and cultured. For 8 weeks,the reactive oxygen species level in chondrocytes were detected by DCFH-DA, the content of NO, SOD and GSH-Px in cell culture supernatant were detected by Griess method. DCFH-DA detection of intracellular reactive oxygen species was (5.46 +/- 0.46)in the control group, (12.08 +/- 0.74) in the model groups. The model group compared with the control group by t test with the P value less than < 0.001. DCFH-DA detection of intracellular reactive oxygen species was (9.81 +/- 0.59)in VAPS 6.25 microg/ ml group, (7.83 +/- 0.63) in the VAPS 12.5 microg/ml group, (6.89 +/- 0.71) in the VAPS 25 microg/ml group, as compared with model group there were statistically significant difference (P < 0.05). The content of NaNO2, SOD and GSH-Px in osteoarthritis model group was (5.60 +/- 0.45) microM, (38.56 +/- 12.53) U/ml and (151.90 +/- 25.60) U, as compared with control group there were statistically significant difference (P < 0.001, P < 0.05); The content of NaNO2 was (4.34 +/- 0.39), M in VAPS 6.25 microg/ml group, (3.67 +/- 0.36) microM in the VAPS 12.5 microg/ml group, (3.20 +/- 0.27) microM in the VAPS 25 microg/ml group, as compared with model group there were statistically significant difference (P < 0.01). The content of SOD was (49.91 +/- 5.77) U/ml in VAPS 6.25 microg/ml group, (54.05 +/- 5.27) U/ml in the VAPS 12.5 microg/ml group, (57.44 +/- 5.70) U/ml in the VAPS 25 microg/mL group, as compared with model group there was statistically significant (P < 0.05). The content of GSH-Px was (172.50 +/- 18.65) U in VAPS 6.25 microg/ml group, (202.10 +/- 21.60) U in the VAPS 12.5 microg/ml group, (315.80 +/- 10.50) U in the VAPS 25 microg/ml group, the VAPS 12.5 microg/mL group and VAPS 25 microg/ml group was compared with model group, there were statistically significant difference (P < 0.01). The VAPS have antioxidative damage effect of osteoarthritis cartilage cells within a certain range and dose-dependent manner. It may be the main mechanism for velvet antler polypeptides to treat osteoarthritis.
Du W.F.,Changchun University
Zhongguo zhen jiu = Chinese acupuncture & moxibustion | Year: 2012
To assess the efficacy of acupuncture and moxibustion on constipation. A retrieval on literatures concerning treatment of constipation with acupuncture was carried out in databases of VIP, CNKI, WANFANG and PubMed. And meta-analyses were conducted on randomized controlled trial (RCT) and controlled clinical trial (CCT) which met the enrolling requirements. A total number of 15 papers involving 1 052 patients were concluded. The result indicated that the curative rate of acupuncture and moxibustion on constipation is better than ordinary medication (RR = 1.92, 95% CI 1.61-2.30, Z = 7.18, P < 0.000 01). And statistical significance can be found between acupuncture-moxibustion treatment and the routine medicine treatment (RR = 1.26, 95% CI 1.18-1.34, Z = 7.26, P < 0.000 01). In the comparison of abdominal pain, defecation duration and general symptom scores, statistical significance can be found between the differences of acupuncture and moxibustion group and control group (abdominal pain: WMD = -0.22, 95% CI-0.32-0.12, Z = 4.28, P < 0.000 1; defecation duration: WMD = -0.47, 95% CI-0.79-0.15, Z = 2.85, P < 0.004; general symptom scores: WMD = -0.41, 95% CI-0.79-0.03, Z = 2.13, P = 0.03). Acupuncture and moxibustion is effective to treat constipation. It has certain advantage when compare with the routine medication treatment. However, since singleness still exists in the index of assessment on therapeutic effect of constipation, and the number of RCT and CCT literatures, especially high-quality, large samples and multi-center reports were still not enough, further studies are still necessary for approving the above conclusions.
Jiang X.,Changchun University
Advance Journal of Food Science and Technology | Year: 2013
The research purpose is to design a mini type household food slicer to slice the root vegetables. The study elaborates on the design of each part of the slicer, including selecting electric motor and V belt, the design of V belt pulley, shaft, elevating mechanism and blade, to introduce the main structure and operating principles of the slicer, based on which the conclusion has been reached. © 2013 Maxwell Scientific Organization.