Guo L.,Zhejiang Sci-Tech University |
Ding H.,Zhejiang Institute of Quality Inspection Science
Applied Mechanics and Materials | Year: 2013
A novel 2-D permanent magnet array for a planar actuator was proposed, in which the portion between adjacent magnetic poles was divided to four small rectangular solids. Magnetic fields of the permanent magnet array were analyzed systematically by 3D finite element method. The analysis results show that, compared with the well-known Halbach magnet array, the proposed array has higher permanent magnet utilization. Keeping the whole permanent magnet volume constant, the arrays with several improved structures were put forward. The magnetic field analyze results prove that the utilization is best, when the ratio between the height of the magnetic poles magnetized vertically and the height of the portion magnetized horizontally is about 2. © (2013) Trans Tech Publications, Switzerland.
Xia D.-Z.,Zhejiang Chinese Medical University |
Zhang P.-H.,Zhejiang Institute of Quality Inspection Science |
Fu Y.,Zhejiang University |
Yu W.-F.,Zhejiang Chinese Medical University |
Ju M.-T.,Zhejiang Chinese Medical University
Food and Chemical Toxicology | Year: 2013
The protective effects of puerarin on liver damage were evaluated by carbon tetrachloride (CCl4)-induced hepatotoxicity in rats. Male rats were orally treated with puerarin daily, and received CCl4 intraperitoneally twice a week for 4weeks. Our results showed that puerarin at doses of 50, 100, and 200mg/kgb.w. significantly reduced the elevated activities of serum alanine aminotransferase, aspartate aminotransferase, alkaline phosphatase, and lactate dehydrogenase at least 15%, 17%, 14% and 18%, respectively. In addition, puerarin at different doses significantly decreased (p<0.05) the level of hepatic thiobarbituric acid reactive substances compared to the CCl4-treated group. Furthermore, the treatment of puerarin was also found to significantly increase the activities of superoxide dismutase, catalase, glutathione peroxidase, glutathione reductase, glutathione-S-transferase, and glutathione content at least 40%, 12%, 25%, 52%, 17% and 44% in the liver of CCl4-treated rats, respectively. Liver histopathology also showed that puerarin reduced the incidence of liver lesions induced by CCl4. The results suggest that puerarin exhibits potent hepatoprotective effects on CCl4-induced liver damages in rats, and that the hepatoprotective effects of puerarin may be due to both the inhibition of lipid peroxidation and to increase of antioxidant enzymes activity. © 2013 Elsevier Ltd.
Ding H.,Zhejiang Institute of Quality Inspection Science |
Guo L.,Zhejiang Sci-Tech University
2014 17th International Conference on Electrical Machines and Systems, ICEMS 2014 | Year: 2015
Linear induction motors(LIM) with discontinuous secondary are more suitable for the application with sharp bend stroke than traditional continuous constructions. But the construction of segmental secondary narrows the eddy current loop area and aggravates the end effect. All these will result in increment of the eddy current loop resistance, decrement of thrust force and ripples in the forces. In order to overcome the disadvantages, the model of the LIM with discontinuous secondary is established by using the field-circuit combined analysis method. Based on the verification of the accuracy of the model by the experiment results of a LIM prototype, the influences of the secondary dimensions on the dynamic characteristics of the LIM were analyzed. And according to the periodicity of the ripples generated by the segments, the design criteria for the secondary are proposed, which is proved to be effective to eliminate the force ripples by simulation results. © 2014 IEEE.
Zhu Y.,Zhejiang Institute of Quality Inspection Science |
Fei T.,Jilin University |
Ma Y.,South China University of Technology
ChemPlusChem | Year: 2016
Five 3,5-difluorophenyl-substituted ruthenium complexes [Ru(bpy)2(dfpbpy)(ClO4)2] (Ru-Fbpy-bpy; bpy=bipyridine, dfpbpy=5,5′-di(3,5-difluorophenyl)-2,2′-bipyridine), [Ru(dpp)2(dfpbpy)(ClO4)2] (Ru-Fbpy-dpp; dpp=4,7-diphenyl-1,10-phenanthroline), [Ru(dpp)2(dfpphen)(ClO4)2] (Ru-Fphen-dpp; dfpphen=5,5′-di(3,5-difluorophenyl)-1,10-phenanthroline), [Ru(dpp)2(4,7-dfpphen)(ClO4)2] (Ru-Fdpp-dpp; 4,7-dfpphen=4,7-di(3,5-difluorophenyl)-1,10-phenanthroline), and [Ru(4,7-dfpphen)3(AsF6)2] (Ru-Fdpp) were synthesized, and their photophysical, electrochemical, and electroluminescent properties were studied systematically. The introduction of the electron-withdrawing group 3,5-difluorophenyl leads to a redshift of the emission of the ruthenium complexes. In addition, the 3,5-difluorophenyl substituent extends the π conjugation of the ligand, and thus facilitates the metal-to-ligand charge-transfer process of the complexes. All the complexes display orange-red phosphorescent emissions centered at 638, 638, 624, 614, and 605 nm, respectively. Density functional theory calculations show that the lowest unoccupied molecular orbital of Ru-Fbpy-dpp, Ru-Fphen-dpp, and Ru-Fdpp-dpp are all distributed on the 3,5-difluorophenyl-substituted ligand. By using these complexes as emitters, highly luminescent single-layer devices are obtained. The optimized device based on Ru-Fdpp exhibits the highest luminous efficiency and power efficiency of 4.19 cd A-1 and 1.46 lm W-1, respectively. Bright ideas: Five 3,5-difluorophenyl-substituted ruthenium complexes have been synthesized and characterized. The photoluminescent efficiencies of the complexes improved after introduction of an electron-withdrawing substituent (see scheme). The complexes are suitable as dopant light-emitting materials for organic light-emitting diodes. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Zhu J.,China North Vehicle Research Institute |
Zhu Y.,Zhejiang Institute of Quality Inspection Science
Guangxue Jishu/Optical Technique | Year: 2013
Optic fiber techniques which can help vehicles get higher performance effectively are used to improve the capacity of action and the intelligent of vehicles in special environment. The latest progress of optical fiber communication and optical fiber sensor using in vehicles are summarized. The operational principle of plastic optic fiber, optic fiber bundle, fiber optic gyroscope, optic fiber sensor network and fiber optic rotary joint which can improve the data processing speed and the transmission capacity are also introduced in detail. At last the future of the optical fiber techniques is prospected.