Block Compressed Sensing of Self-adaptive Measurement and Combinatorial Optimization

Li Mingxing,Chen Xiuxin,Su Weijun,Yu Chongchong 보안공학연구지원센터 2015 International Journal of Hybrid Information Techno Vol.8 No.5

The block compressed sensing has brought forth the problem that the reconstructed image is of lower quality compared with that of the compressed sensing. A new method is proposed in this paper, named as Block Compressed Sensing of Self-adaptive Measurement and Combinatorial Optimization, which capably solves the problem. According to different sparsity of each image block, we firstly measure the blocks by using different projections; then, we choose measurement with the optimal reconstruction as the final measurement. Eventually, reconstruct the original image using the optimal measurement we got. The proposed method outperforms the compressed sensing in terms of real-time and better reconstruction quality is achieved than the block compressed sensing. Our experimental results verify the superiority of the proposed method.

Prediction Model for unfavorable Outcome in Spontaneous Intracerebral Hemorrhage Based on Machine Learning

Shengli Li,Jianan Zhang,Xiaoqun Hou,Yongyi Wang,Tong Li,Zhiming Xu,Feng Chen,Yong Zhou,Weimin Wang,Mingxing Liu 대한신경외과학회 2024 Journal of Korean neurosurgical society Vol.67 No.1

Objective : The spontaneous intracerebral hemorrhage (ICH) remains a significant cause of mortality and morbidity throughout the world. The purpose of this retrospective study is to develop multiple models for predicting ICH outcomes using machine learning (ML). Methods : Between January 2014 and October 2021, we included ICH patients identified by computed tomography or magnetic resonance imaging and treated with surgery. At the 6-month check-up, outcomes were assessed using the modified Rankin Scale. In this study, four ML models, including Support Vector Machine (SVM), Decision Tree C5.0, Artificial Neural Network, Logistic Regression were used to build ICH prediction models. In order to evaluate the reliability and the ML models, we calculated the area under the receiver operating characteristic curve (AUC), specificity, sensitivity, accuracy, positive likelihood ratio (PLR), negative likelihood ratio (NLR), diagnostic odds ratio (DOR). Results : We identified 71 patients who had favorable outcomes and 156 who had unfavorable outcomes. The results showed that the SVM model achieved the best comprehensive prediction efficiency. For the SVM model, the AUC, accuracy, specificity, sensitivity, PLR, NLR, and DOR were 0.91, 0.92, 0.92, 0.93, 11.63, 0.076, and 153.03, respectively. For the SVM model, we found the importance value of time to operating room (TOR) was higher significantly than other variables. Conclusion : The analysis of clinical reliability showed that the SVM model achieved the best comprehensive prediction efficiency and the importance value of TOR was higher significantly than other variables.

Pharmacokinetics and Biodistribution of Surface Modification Polymeric Nanoparticles

Mingxing Liu,Huifang Li,Guoan Luo,Qingfei Liu,Yiming Wang 대한약학회 2008 Archives of Pharmacal Research Vol.31 No.4

The objective of this study is to investigate the pharmacokinetics and biodistribution of free breviscapine (BVP) and coated BVP-loaded poly (D, L-lactic acid) nanoparticles (BVP-PLANPs) in rats after i.v. administration. Coated BVP-PLA-NPs were prepared by the spontaneous emulsification solvent diffusion method and characterized. The BVP content in the NPs, the biological samples and in vitro release was measured by the high-performance liquid chromatography (HPLC). The mean sizes of coated BVP-PLA-NPs were 177 and 319 nm with a narrow distribution and smooth sphere shapes, entrapment efficiency of 86.9% and 93.1%, respectively. Drug release profiles in phosphate buffer and plasma exhibited a biphasic release phenomenon. After i.v. administration of free BVP and NPs suspensions in rats, area under plasma concentration-time curve and elimination t1/2 were increased 9.3-fold and 10.9-fold for 177 nm of NPs, and 4.4-fold and 17.1-fold for 319 nm of NPs compared with that of free BVP, respectively. NPs were mainly distributed in liver, spleen, heart and brain. In addition, NPs could penetrate blood brain barrier (BBB) and the particle size had some effect on pharmacokinetics and biodistribution. Coated BVP-PLA-NPs could effectively avoid the capture by the reticuloendothelial system and prolong the half-life of BVP. Moreover, these NPs could penetrate BBB and enhance the accumulation of BVP in brain.

Combined Effect of the Prior Deformation and Applied Stress on the Bainite Transformation

Mingxing Zhou,Guang Xu,Li Wang,Haijiang Hu 대한금속·재료학회 2016 METALS AND MATERIALS International Vol.22 No.6

There has been a continued interest over the past years in the effects of external stress or prior deformation onthe bainite transformation. In this study, the combined effect of prior deformation and stress on the bainitetransformation was investigated and the interaction between the effects of prior deformation and stress wasdiscussed in detail. The results show that although single deformation and single stress promote the bainitetransformation, their combination cannot promote the bainite transformation to a much larger degree. In addition, atthe early stage of transformation, the promotion effects of prior deformation and stress on the amount of the bainitetransformation are enhanced by each other. However, at the latter stage, the deformation weakens the promotioneffect of the stress. Moreover, prior deformation at a low temperature accelerates the kinetics of the bainite transformationwith stress, but it decreases the amount of the bainite transformation even if the deformation is small.

Ab initio MRCI+Q Investigations of Spectroscopic Properties of Several Low-lying Electronic States of S₂⁺ Cation

Li, Rui,Zhai, Zhen,Zhang, Xiaomei,Liu, Tao,Jin, Mingxing,Xu, Haifeng,Yan, Bing Korean Chemical Society 2014 Bulletin of the Korean Chemical Society Vol.35 No.5

The complete active space self-consist field method followed by the internally contracted multireference configuration interaction method has been used to compute the potential energy curves of $X^2\prod_g$, $a^4\prod_u$, $A^2\prod_u$, $b^4\sum_{g}^{-}$, and $B^2\sum_{g}^{-}$ states of $S{_2}^+$ cation with large correlation-consistent basis sets. Utilizing the potential energy curves computed with different basis sets, the spectroscopic parameters of these states were evaluated. Finally, the transition dipole moment and the Franck-Condon factors of the transition from $A^2\prod_u$ to $X^2\prod_g$ were evaluated. The radiative lifetime of $A^2\prod_u$ is calculated to be 887 ns, which is in good agreement with experimental value of $805{\pm}10$ ns.

Presulfidation and activation mechanism of Mo/Al2O3 catalyst sulfided by ammonium thiosulfate

Mingxing Tang,Xuekuan Li,Hui Ge,Weibin Fan,Guofu Wang,Zhanjun Lyu 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.8

Mo/Al2O3 catalyst was presulfided with (NH4)2S2O3 to elucidate presulfidation and activation mechanism. Itis illustrated that the Mo oxide is firstly partially sulfided during presulfidation and then in situ reduced into MoS2−x inactivation, and finally sulfided to active state during hydrodesulfurization (HDS). A synergistic effect between the S2− andS6+ ions in (NH4)2S2O3 produces a positive influence on the HDS performance. The S2− ions contribute to the sulfidationof Mo ions, while the S6+ species interact with Al2O3 support, weakening the interaction of active species with support.

Ab initio MRCI+Q Investigations of Spectroscopic Properties of Several Low-lying Electronic States of S2+ Cation

Rui Li,Zhen Zhai,Xiaomei Zhang,Tao Liu,Mingxing Jin,Haifeng Xu,Bing Yan 대한화학회 2014 Bulletin of the Korean Chemical Society Vol.35 No.5

The complete active space self-consist field method followed by the internally contracted multireference configuration interaction method has been used to compute the potential energy curves of X2Πg, a4Πu, A2Πu, b4Σ− g, and B2Σ− g states of S2 + cation with large correlation-consistent basis sets. Utilizing the potential energy curves computed with different basis sets, the spectroscopic parameters of these states were evaluated. Finally, the transition dipole moment and the Franck-Condon factors of the transition from A2Πu to X2Πg were evaluated. The radiative lifetime of A2Πu is calculated to be 887 ns, which is in good agreement with experimental value of 805 ± 10 ns.

Design and Co-simulation of an Antiskid Brake System for a Civil Aircraft

Dawei Li,Mingxing Lin,Tao Zhang 한국항공우주학회 2023 International Journal of Aeronautical and Space Sc Vol.24 No.3

To accelerate the design phases of the antiskid control system for a turboprop aircraft and to effectively ensure appropriate results, a brake-by-wire antiskid control system for a business aircraft is designed and investigated using a new virtual prototyping technology, which significantly reduces time, effort and cost. In contrast to traditional empirical formula methods, a multidisciplinary modeling co-simulation method has been proposed in this paper. The mathematical modeling process and antiskid control algorithm (Pressure Bias Modulation–Proportional–Integral Derivative) were analyzed and adopted. The co-simulation model was designed based on multi-body dynamic and multidisciplinary approach. The simulation results were compared with measured data sampled from an inertial platform test rig. The simulation results and physical experiment results proved the efficiency of the overall system.

Hydrothermal synthesis of stable metallic 1T phase WS₂ nanosheets for thermoelectric application

Piao, Mingxing,Chu, Jin,Wang, Xiao,Chi, Yao,Zhang, Heng,Li, Chaolong,Shi, Haofei,Joo, Min-Kyu IOP 2018 Nanotechnology Vol.29 No.2

<P>Two-dimensional materials have gained great attention as a promising thermoelectric (TE) material due to their unique density of state with confined electrons and holes. Here, we synthesized 1T phase tungsten disulfide (WS<SUB>2</SUB>) nanosheets with high TE performance via the hydrothermal method. Flexible WS<SUB>2</SUB> nanosheets restacked thin films were fabricated by employing the vacuum filtration technique. The measured electrical conductivity was 45 S cm<SUP>−1</SUP> with a Seebeck coefficient of +30 <I>μ</I>V K<SUP>–1</SUP> at room temperature, indicating a p-type characteristic. Furthermore, the TE performance could be further improved by thermal annealing treatment. It was found the electrical conductivity could be enhanced 2.7 times without sacrificing the Seebeck coefficient, resulting in the power factor of 9.40 <I>μ</I>W m<SUP>−1</SUP> K<SUP>−2</SUP>. Moreover, such 1T phase WS<SUB>2</SUB> nanosheets possess high phase stability since the TE properties maintained constant at least half one year in the air atmosphere. Notably, other kinds of 1T phase transitional metal dichalcogenides (TMDCs) with excellent TE performance also could be imitated by using the procedure in this work. Finally, we believe a variety of materials based on 1T phase TMDCs nanosheets have great potential as candidate for future TE applications.</P>

Pharmacokinetics and Biodistribution of Surface Modification Polymeric Nanoparticles

Liu, Mingxing,Li, Huifang,Luo, Guoan,Liu, Qingfei,Wang, Yiming 대한약학회 2008 Archives of Pharmacal Research Vol.31 No.4

The objective of this study is to investigate the pharmacokinetics and biodistribution of free breviscapine (BVP) and coated BVP-loaded poly (D, L-lactic acid) nanoparticles (BVP-PLA-NPs) in rats after i.v. administration. Coated BVP-PLA-NPs were prepared by the spontaneous emulsification solvent diffusion method and characterized. The BVP content in the NPs, the biological samples and in vitro release was measured by the high-performance liquid chromatography (HPLC). The mean sizes of coated BVP-PLA-NPs were 177 and 319 nm with a narrow distribution and smooth sphere shapes, entrapment efficiency of 86.9% and 93.1%, respectively. Drug release profiles in phosphate buffer and plasma exhibited a biphasic release phenomenon. After i.v. administration of free BVP and NPs suspensions in rats, area under plasma concentration-time curve and elimination $t_{1/2}$ were increased 9.3-fold and 10.9-fold for 177 nm of NPs, and 4.4-fold and 17.1-fold for 319 nm of NPs compared with that of free BVP, respectively. NPs were mainly distributed in liver, spleen, heart and brain. In addition, NPs could penetrate blood brain barrier (BBB) and the particle size had some effect on pharmacokinetics and biodistribution. Coated BVP-PLA-NPs could effectively avoid the capture by the reticuloendothelial system and prolong the half-life of BVP. Moreover, these NPs could penetrate BBB and enhance the accumulation of BVP in brain.