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- 저자 : Jinbao He (검색결과 4 건)
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A Simulation Study on the Depth Information of Motor Units
Jinbao He,Xinhua Yi,Zaifei Luo 대한의용생체공학회 2016 Biomedical Engineering Letters (BMEL) Vol.6 No.2
Purpose The depth information of muscle motor units isimportant in clinical applications. The purpose of this paperis to investigate relationship between motor unit actionpotentials from surface electromyography and motor unit(MU) depth. Methods Firstly, the skin structure was depicted, and theaction potential was considered as a constant current source,which was generated by a tripole model. Secondly, thepotential generated by the tripole on the surface was given. Finally, the relationships between MU depth and MU actionpotential (MUAP) parameters on the skin were studied. Results The regression analysis showed a low relative errorfor the simulated signals. When the position of the detectedelectrodes was 18 mm, the linear regression analysis yielded2.47% in the case of arc, and 2.48% in the case of side. Therelationships between the peak to peak amplitude of MUAPand the lengths (arc and side) were tested by the nonlinearregression analysis. The sum of the squared errors was lessthan 0.0202, and the coefficient of determination was morethan 0.9939. Conclusions These results show that it is possible to estimateMU depth by action potentials on surface electrodes.
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Yao Jinbao,Xia He,Zhang Nan,Yu Bin 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.6
Building vibration prediction induced by moving train can indicate the degree of vibration influence by moving train. With the predictionresults, the corresponding measurements can be used to reduce the influence of vibration. To obtain an accurate prediction result,support vector machine (SVM) is used in this paper. Since the error in the recorded data affects the prediction performance of SVM obviously,wavelet analysis is adopted to filter the input data. The prediction model based on SVM and wavelet analysis is validated by thedata of field experiments. The results show that the prediction model can provide a good performance compared with the measured values.
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Wenwei Yu,Faying Lai,Jinbao He,Kaiyun He,Rong Wang,Danping Li,Quanyuan Chen 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.118 No.-
Catalytic performances and leaching behavior of 9 natural iron minerals as heterogeneous electro-Fentoncatalysts for the treatment of imidacloprid wastewater were studied. The results showed that magnesioferriteexhibited the best catalytic ability among these minerals with UV absorbance at 270 nm (UV270)removal of 83.59% and COD removal of 49.11% within 4 h using graphite cathode and Ti/(RuO2)0.88-(IrO2)0.12 anode at initial pH 3 with a catalyst dose of 5 g/L, a current density of 40 mA/cm2 and an electrodespacing of 2 cm. The instantaneous current efficiency (ICE) at 4 h and energy consumption (EC)reached 2.30% and 2.20 kWh/gCOD respectively. It was found that the components contained in naturaliron minerals, such as Al, alkali metal (K) and alkaline earth metals (Mg, Ca, Ba), would dissolve into theelectrolyte solution, raising the final pH to 6.5–8.5 and ultimately reducing the reaction efficiency. Exceptmagnetite and magnesioferrite, other minerals, such as ilmenite and V-Ti magnetite, were likely to causesecondary pollution. The subsequent adjustment to alkaline state for chemical precipitation of leachedMn was needed. Pyrite showed relatively high leachability in hazardous elements (especially Pb), whichshould be carefully evaluated before its actual application in electro-Fenton process.
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A novel and effective approach to enhance the interfacial interactions of meta-aramid fibers
Hui Zhang,Xiaoyun Du,Jiawei Liu,YunHong Bai,Jingyi Nie,Jiaojun Tan,Zhibin He,Meiyun Zhang,Jinbao Li,Yonghao Ni 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.120 No.-
Meta-aramid paper exhibits some unique properties, including high temperature resistance, electricalinsulation. However, due to the inherent chemical inertness of aramid fibers, the interfacial bondingbetween fibers is weak, which negatively affect the properties of aramid paper. Herein, we report a simple,effective and scalable process for substantially improving the interfacial bonding between aramidfibers, thus, mechanical and insulating properties of the meta-aramid composite paper, and it wasachieved by surface coating of aramid paper with meta-aramid stock solution that contains N, N dimethylacetamide(DMAc)-CaCl2 and high molecular weight poly (m-phenylene isophthalamide) polymers. Results show that the tensile strength, modulus, internal bond strength and tearing index of the resultantall-PMIA paper increased by 83 %, 58 %, 173 % and 89 %, respectively, in comparison with those of the control. The breakdown strength of the improved aramid paper is 190 % higher than that of the control paper,attaining 26.46 KV/mm. This work provides a simple, economical, efficient, and scalable method toimprove the overall performance of meta-aramid paper, which has great potential to be implementedat the industrial scale.
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