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Hui-Fen Wu,Suresh Kumar Kailasa,Ja-Yi Yan,Chen-Che Chin,Hsin-Yi Ku 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
This paper describes the use of single-drop microextraction and micro-volume pipette extraction coupled with capillary electrophoresis for the analysis of five antidepressant drugs (nortriptyline, imipramine, trimeprazine, promethazine, and iminodibenzyl). The five antidepressant drugs are well separated by using micellar electrokinetic capillary chromatography with SDS and organic modifiers. The best extraction was achieved within 10 min and effectively separated within 15 min by using ammonium acetate buffer at 28 kV. This method shows good reproducibility, with RSD values ranging from 4.3 to 8.7%. The LODs values were found to be 0.4 and 1.0 mg mL-1 for SDME-CE and 0.15 and 0.5 mg mL-1 for MVPE-CE. These methods are simple, rapid, sensitive and efficient for the extraction, separation and detection of tricyclic antidepressant drugs.
Study on Importance Function for Particle Filter
Liu Lu,Meng Yang,Shu Geng,Shu-fen Wang,Yong-hui Wang 보안공학연구지원센터 2015 International Journal of Multimedia and Ubiquitous Vol.10 No.2
As an important nonlinear filter theory, particle filter is a heated issue in domestic and foreign researches. The option of importance density is one of the key steps of particle filter algorithm. The proper option of importance density can minish the negative influence of filter algorithm caused by degeneracy problem. This paper introduces several widely-used options of importance density systemically, and analyzes their features and applied perspectives respectively. The paper also advances a comprehensive method of importance density, analyzes its technical features, explores the adjudgement and improvement of this method based on various performance, and finally puts forward the necessary further study according to the engineer requirements.
Fen-Qiang Li,Juehao Ding,Miao Zheng,Jianlin Xu,Xiaohong Ge,Hui Li,Jun Zhao 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.7
A combination of multi-physics numerical simulation and experiment was conducted to study the magnetic pulse compaction technology driven by two aluminum tubes of tungsten copper powder. Then, the effects of different process parameters on the density and uniformity of the compact were studied by tuning the thickness of the pack and driver tubes and the gap between them. Results show that the density of compact is the highest when the thickness of the driver tube is 1.0 mm. More energy is consumed for force conduction as the thickness of the pack tube increases. Thus, the density of the compact is the highest when the thickness of the packer tube is 0.8 mm. The speed of the driver tube impacting the pack tube also increases with the rise in the gap. Accordingly, the compaction density with the gap of 1.5 mm is the highest under the same other parameters.
Optimization of the Field Shaper Parameters in Electromagnetic Pulse Crimping of Cable
Fen-Qiang Li,Jishuai Jiang,Hongsong Cheng,Jianling Xu,Xiaohong Ge,Hui Li,Jun Zhao,Yang Ran 한국정밀공학회 2021 International Journal of Precision Engineering and Vol.22 No.10
Crimping of wires to achieve a secure connection is one of the most critical challenges in fabrication of electronic circuit boards, automobiles, aviation, satellite and communication components. The electromagnetic pulse crimping process offers great potential to successfully address these challenges. In this paper, ANSYS/Multi physical software was used to first determine the electromagnetic force distribution on the terminal lug by analyzing the magnetic field in the electromagnetic pulse crimping process. The electromagnetic force was then imported into the ABAQUS/Explicit software as the boundary condition to calculate the deformation behavior of the terminal lug barrel and cable according to the stress–strain curve of the terminal material under high strain rate. The calculated deformation result was subsequently verified by experimental data. Three main parameters of the field shaper were analyzed to determine their influence on the crimping result; slit position, the inner diameter vertical dimension and the position relationship between the terminal lug and field shaper. Then using the empirical formula we calculated and verified the inner diameter vertical dimension of the field shaper. The model proved to be reliable. Deformation of the terminal was determined to be uneven along the circumference in the crimping area. For the type of terminal lug studied, an inner diameter vertical dimension of 10 mm proved to be optimum for increased strength of the crimped terminal connection. Allowing the terminal to protrude 1 mm from the field shaper resulted in a flatter crimped area and significant improvement in the quality of the crimped barrel surface. The empirical formula for calculating the inner diameter vertical dimension of the field shaper is reasonable and reliable, and the calculated measurement resulted in improved connection strength. The results of this research can be used to guide the electromagnetic pulse crimping of other terminal lug and cable types.
Jun-Hui Zheng,Jian-Fen Liu 보안공학연구지원센터 2016 International Journal of Grid and Distributed Comp Vol.9 No.3
In this paper, a robust kalman filter is designed for the uncertainty time-varying discrete systems with state delay in process and output matrices combined with the possibility of missing measurements. The uncertainties are expected in the process, output and white noise covariance matrices. A formula for a candidate upper bound on the actual state estimation error variances for all admissible parameter uncertainties and possible missing measurements is obtained. The filter parameters are optimized to give a minimal upper bound on the state estimation error covariance for all admissible uncertainties and missing measurements.