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Chen M.C.,Chaohu University | Wang F.,Jiujiang College
Advanced Materials Research | Year: 2014

Handwritten numeral recognition is an important branch in the field of pattern recognition, has broad application prospects. This article presents a method of using BP Neural Network to implement programme for recognition of free handwritten numerals. Scanned handwritten numeral image after preprocessing and feature extraction, classificated and recognized by the BP Neural Network. Through Matlab simulation experiments it shows that the recognition method is effective and has high recognition rate. © (2014) Trans Tech Publications, Switzerland.


Lin L.,Guizhou University | Lin L.,Nanjing Southeast University | Yang M.-Q.,Guizhou University | Li J.,Nanjing Southeast University | Wang Y.,Jiujiang College
International Journal of Industrial Ergonomics | Year: 2012

Since the combined effects of the product's various modeling features contribute to a large extend to consumers' perceptual evaluation of the product, it is of high necessity for designers to make exhaustive research on the mental feeling aroused by the product's multi-dimensional modeling features (MMFs) if they intend to design a product that echoes users' affective needs. By deconstructing the product components into human interface elements (HIEs) from the perspective of multi-sense channel, this thesis advances a layered general deconstruction method, and deconstructs, with cell phones as samples, 90-multiple MMFs. Then on the basis of the testers' image evaluation of 20 cell phone samples in connection with the given affection, multiple linear regression technique is employed to establish the Kansei Engineering (KE) model of product MMFs and affection. Lastly, the partial regression coefficient values derived from regression calculation are used to determine the key design features, and the negative and positive natures of the values are employed to deduce the effect of modeling features' variation trend on the expression of affection. In this process, design rules for key MMFs are formulated to guide the cell phone's affection design. Relevance to industry: A product's possession of the user-needed affection has become a key factor to increase the product's market competitiveness. Knowledge of the product image brought about by the interplay of multi-dimensional modeling features (MMFs) like a product's shape, color, and materials will help reduce the deviation of product image from the user's real feelings. The formulation of MMFs design rules will help product designers to flexibly coordinate the features that play key roles in the expression of affection. Although the design rules are deduced from the case of cell phones, the deduction method of products and the deduce method of MMFs' design rules, however, are also applicable to other products. The method of deductive system for MMFs design rules will provide an effective mechanism in promoting the Kansei design of consumer-oriented products. © 2012 Elsevier B.V.


Chen S.-P.,Nanchang University | Tu B.-Y.,Jiujiang Xunyang District CDC | Wang X.,Jiujiang College
Chinese Journal of Evidence-Based Medicine | Year: 2010

Objective: To study the distribution of HIV/AIDS high-risk population, HIV infection and the main risk factors for developing HIV/AIDS' controllable measures and exploring appropriate health education and behavior intervention models. Methods: A total of 360 commercial sex workers (CSW) joined together through convenience sampling and 360 drug users (DU) joined together through convenience sampling or snow-balling sampling whose relevant behavior factors were investigated by questionnaires. Results: The general rate of knowing knowledge about AIDS was 75.2% among 360 CSW, 67.8% CSW used condom in commercial sex activities; none of 149 CSW blood samples was detected HIV or syphilis antibody positive. The general rate of knowing knowledge about AIDS was 83.7% among 360 DU who injected drugs last month, the rate of sharing needles was 47.6% and the low rate of condom used; 1 HIV antibody and 5 syphilis antibodies positive were found among 198 DU blood samples, so HIV and syphilis infection rate were 0.51% and 2.53%, respectively. Conclusion: The rate of HIV infection is a very low level and there are many risk factors among CSW and DU. A good job should be done to integrate AIDS health education with behavioral intervention and the monitoring system for the AIDS/HIV high-risk population should be improved. © 2010 Editorial Board of Chin J Evid-based Med.


Hu S.B.,Hubei University | Wang F.,Jiujiang College | Yu C.H.,Hubei University
Biomedical and Environmental Sciences | Year: 2015

Objective To assess the data quality and estimate the provincial infant mortality rate (1q0) from China's sixth census. Methods A log-quadratic model is applied to under-fifteen data. We analyze and compare the average relative errors (AREs) for 1q0 between the estimated and reported values using the leave-one-out cross-validation method. Results For the sixth census, the AREs are more than 100% for almost all provinces. The estimated average 1q0 level for 31 provinces is 12.3‰ for males and 10.7‰ for females. Conclusion The data for the provincial 1q0 from China's sixth census have a serious data quality problem. The actual levels of 1q0 for each province are significantly higher than the reported values. © 2015 The Editorial Board of Biomedical and Environmental Sciences.


Li C.-J.,Xi'an Jiaotong University | Wang H.-T.,Jiujiang College | Yang G.-J.,Xi'an Jiaotong University | Bao C.-G.,Xi'an Jiaotong University
Journal of Thermal Spray Technology | Year: 2011

FeAl intermetallic compound coating was prepared by cold spraying using a mechanically alloyed Fe(Al) alloy powder followed by post-spray annealing at 950 °C. The high-temperature abrasive wear test was carried out for the FeAl coating at a temperature range from room temperature to 800 °C. The high-temperature abrasive wear of a heat-resistant stainless steel 2520 was performed for comparison. It was observed that the abrasive wear weight loss of FeAl coating was proportional to wear cycles in terms of sample revolutions at the tested temperatures. It was found that with the increase of the test temperature higher than 400 °C, the wear rate of cold-sprayed FeAl coating decreased with the increase of test temperature, while the wear rate of the heat-resistant steel increased significantly. The results indicate that the high-temperature abrasive wear resistance of the cold-sprayed FeAl intermetallic coating increased with the increase of the wear temperature in a temperature range from 400 to 800 °C. The wear resistance of cold-sprayed FeAl coating was higher than that of heat-resistant 2520 stainless steel under 800 °C by a factor of 3. © 2010 ASM International.


Wang Y.,Wuhan University | Xiong J.,Jiujiang College | Yang J.,Wuhan University | Xu W.,Wuhan University
Medical Journal of Wuhan University | Year: 2015

Objective: To investigate the localization and expression of USP22 in villus and decidua in the first trimester pregnancy. Methods: The localization, mRNA and protein expression levels of USP22 in villus and decidua from 20 cases of normal early pregnant women and 15 patients with unexplained recurrent spontaneous abortion were detected by immunohistochemistry, fluorescence real-time quantitative PCR and Western blot. Results: Immunohistochemical showed that there were both expression in trophoblasts and decidual stromal cells of normal early pregnancy. USP22 mainly located in cytoplasm in decidual stromal cells and also mainly located in cytoplasm and cytomembrane of trophoblasts cells in villus. Real-time quantitative PCR and Western blot detection showed that the expression of USP22 mRNA and protein were in villi and decidua; Compared with normal pregnancy, USP22 mRNA and protein expression levels of villi in patients with recurrent spontaneous abortion decreased significantly (P<0.05), and there were no statistically significant difference in decidua (P>0.05). Conclusion: USP22 is expressed in the maternal-fetal interface, and participates in the regulation of trophoblast invasion in the normal early pregnancy and maintenance of normal pregnancy. The down-regulation of USP22 expression in the maternal-fetal interface may be one of the causes of spontaneous abortion. ©, 2015, Editorial Board of Medical Journal of Wuhan University. All right reserved.


Sun G.G.,Jiujiang College | Yi D.L.,Jiujiang College | Liu C.H.,Jiujiang College
Advanced Materials Research | Year: 2014

TiN and TiAlN films have been coated on the surface of tool materials by various methods for the life-time extension of tool. In this work, for the improvement of hardness and adhesion of coating to SKD61 substrate, radical nitriding (RN) of substrate was carried out at 450°C for 5 hours in ammonia gas pressure of 2.7×103 Pa. The results showed that TiN and TiAlN coatings were distributed uniformly on the SKD 61 substrate. And the film thickness was up to 4 μm, which showed so high deposition efficiency (~ 66.7 nm/min) of arc ion plating at this typical process condition. For both coatings, the TiN phases could be detected and the (111) was dominant crystallite grown orientation. The AlN crystallite structure could be detected as expected in TiAlN film. The critical load of TiN film (22.36 N) was slightly smaller than that of TiAlN film (23.88 N). With increasing the load during scratch test, the friction coefficient of TiN film rose quickly, but friction coefficient of TiAlN had a little change, even decreased slightly. © (2014) Trans Tech Publications, Switzerland.


Cheng Z.-Y.,Wuhan University of Science and Technology | Liu J.,Wuhan University of Science and Technology | Chen W.-S.,Wuhan University of Science and Technology | Lin X.-F.,Wuhan University of Science and Technology | And 3 more authors.
Gongneng Cailiao/Journal of Functional Materials | Year: 2014

The 0.35 mm thickness Fe-6.5%Si-0.5%Cu alloy sheet prepared by hot-warm rolling has good surface quality. The microstructure of the hot-rolled sample and warm-rolled sample was observed. The vickers hardness of the hot-rolled sample and warm-rolled sample was tested. The structure and property of the Fe-6.5%Si-0.5%Cu alloy after the rolling process was investigated. Simultaneously, the magnetic properties of the warm-rolled alloy sheet was tested. The results show that, there was some slip band and only a little B2 ordered phase in the warm-rolled sample. The alloy sheet prepared by this experiment has good shape, high saturation magnetic induction and low iron loss.


Xiong M.,Jiujiang College | Zha D.,Jiujiang College | Wu L.,Jiujiang College
Shuju Caiji Yu Chuli/Journal of Data Acquisition and Processing | Year: 2010

To solve the whitening problem of the colored noise through the linear or nonlinear system with non-Gaussian white noise input, based on the concept of stable white noise and its judge criterion, an improved whitening method is proposed in the linear system under α-stable conditions. And the model parameters of the stable color noise are estimated in the linear system, then the whitening method is explored. The simulation and the analysis show that the method is more robust and solid than the existed methods.


Cheng Z.Y.,Wuhan University of Science and Technology | Liu J.,Wuhan University of Science and Technology | Chen W.S.,Wuhan University of Science and Technology | Sun G.D.,Jiujiang College | And 5 more authors.
Advanced Materials Research | Year: 2013

Fe-6.5wt%Si silicon steel has excellent soft magnetic properties, but its ductility in room temperature is near zero. A lot of researchers tried to improve the ductility by adding alloy elements. In this paper, we summarized the action mechanism and the content of these alloy elements according to the overseas and domestic research status. Al, B, Cr, RE, et al. improved the ductility of Fe-6.5wt%Si silicon steel in low temperature, but reduced its magnetic properties simultaneously. Ni, Ti, Mn, et al. improved the ductility of Fe-6.5wt%Si silicon steel inconspicuously. © (2013) Trans Tech Publications, Switzerland.

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