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Fabrication and Photocatalytic Properties of Visible Light Responsive Cuprous Oxide Cubes
Lin, Jiudong,Tao, Feifei,Sheng, Congcong,Li, Jianwei,Yu, Xiaoding Korean Chemical Society 2014 Bulletin of the Korean Chemical Society Vol.35 No.4
The cuprous oxide cubes with the special porous surface constructed by nano-prisms have been successfully fabricated by a solvothermal method. The template-free method is simple and facile without any surfactant. The X-ray powder diffraction (XRD) pattern suggests that the as-prepared product is the pure primitive cubic $Cu_2O$. The effects of the experimental parameters, such as the reaction temperature, reaction time and the concentration of sodium acetate anhydrous, on the morphologies of the products were investigated in detail by the scanning electron microscopy (SEM). Based on the time-dependent experiments, the possible formation mechanism was proposed. Using photocatalytic degrading reactive dyes as the model reaction and xenon lamp to simulate sunlight, the $Cu_2O$ cubes with the porous surface might possess higher photocatalytic activity than those of the commercial $Cu_2O$ powder in the visible-light region, indicating the excellent photocatalytic performance.
Yuqian Lin,Guangming Zhuang,Jianwei Xia,Wei Sun,Junsheng Zhao 제어·로봇·시스템학회 2022 International Journal of Control, Automation, and Vol.20 No.3
In this paper, the problem of asynchronous robust H∞ dynamic output feedback control for Markovian jump neural networks with norm-bounded parameter uncertainties and mode-dependent time-varying delays is investigated. The improved delay-dependent stochastic stability conditions and bounded real lemma are obtained by introducing the relaxation variables, which reduces the conservatism caused by boundary technology and model transformation. An improved Lyapunov-Krasovskii functional is constructed using linear matrix inequalities. On this basis, the solution of robust H∞ dynamic output feedback problem and sufficient conditions for solving the problem of asynchronous dynamic output feedback controller are given respectively. Asynchronous dynamic output feedback controller is constructed to ensure that the closed-loop mode-dependent time-varying delays Markovian jump neural networks achieve different convergence speeds. The given H∞ performance index is satisfied for the delays not bigger than a given upper bound. Numerical examples are employed to show the effectiveness and correctness of the method presented in this paper.
Fabrication and Photocatalytic Properties of Visible Light Responsive Cuprous Oxide Cubes
Jiudong Lin,Feifei Tao,Congcong Sheng,Jianwei Li,Xiaoding Yu 대한화학회 2014 Bulletin of the Korean Chemical Society Vol.35 No.4
The cuprous oxide cubes with the special porous surface constructed by nano-prisms have been successfully fabricated by a solvothermal method. The template-free method is simple and facile without any surfactant. The X-ray powder diffraction (XRD) pattern suggests that the as-prepared product is the pure primitive cubic Cu2O. The effects of the experimental parameters, such as the reaction temperature, reaction time and the concentration of sodium acetate anhydrous, on the morphologies of the products were investigated in detail by the scanning electron microscopy (SEM). Based on the time-dependent experiments, the possible formation mechanism was proposed. Using photocatalytic degrading reactive dyes as the model reaction and xenon lamp to simulate sunlight, the Cu2O cubes with the porous surface might possess higher photocatalytic activity than those of the commercial Cu2O powder in the visible-light region, indicating the excellent photocatalytic performance.
Design and analysis of a 6-DOF mobile parallel robot with 3 limbs
Ying Hu,Jianwei Zhang,Zhong Wan,Jingchuan Lin 대한기계학회 2011 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.25 No.12
Mobile parallel robots (MPR), which structurally configured a moving platform and several parallel limbs with an actuating wheel at the end of each limb, exhibit advantages in high mobility, high load capability and high flexibility in complex task environments. In this paper, a 6-DOF MPR with 3-PPUU (Prismatic-Prismatic Universal-Universal) limbs is proposed. The structural scheme and inverse kinematics are first presented; the orientational workspace and the dexterity of the MPR are analyzed in detail. A parametric optimal design model is then developed; the optimal scheme of the MPR is obtained. The constant-posture control scheme and algorithm are also proposed in this paper. A prototype of the 3-PPUU MPR with omni-orientational wheels is developed and the precision for both translation and orientation of the prototype is measured by experiments, which verify the feasibility of the proposed MPR scheme.
Highly efficient and ultra-rapid adsorption of malachite green by recyclable crab shell biochar
Jia Wu,Jianwei Yang,Pu Feng,Lishan Wen,Guohuan Huang,Chuanhui Xu,Baofeng Lin 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.113 No.-
In this study, waste crab shell was hydrothermally carbonized and then activated to prepare an effectiveand recyclable adsorbent. The adsorption performance of the adsorbent for different dyes was investigatedthrough adsorption experiments, and the results showed that it had the largest adsorption performancefor malachite green. Furthermore, the adsorption performance and mechanism of malachite greenwere investigated by static and dynamic adsorption method. The crab shell biochar could remove6142.5 mg g1 of malachite green within 3 minutes, indicating that the crab shell biochar could ultrarapidand highly efficient adsorb malachite green. In addition, the malachite green adsorbed on the crabshell biochar could be removed by calcination, which achieved the entire regeneration of the crab shellbiochar. The adsorption of malachite green by crab shell biochar adsorbent conformed to the pseudosecond-order kinetic model, the Dubinin-Radushkevich and Langmuir isotherm adsorption model. Physical and chemical characterization indicated that the adsorption mechanism of malachite greenincluded alkaline fading effect, hydrogen bonding and p-p interaction.
Zheyu Yang,Yu Heng,Jianwei Lin,Chenghao Lu,Dingye Yu,Lei Tao,Wei Cai 대한암학회 2020 Cancer Research and Treatment Vol.52 No.4
Purpose Central lymph node metastasis (CNM) are highly prevalent but hard to detect preoperatively in papillary thyroid carcinoma (PTC) patients, while the significance of prophylactic compartment central lymph node dissection (CLND) remains controversial as a treatment option. We aim to establish a nomogram assessing risks of CNM in PTC patients, and explore whether prophylactic CLND should be recommended. Materials and Methods One thousand four hundred thirty-eight patients from two clinical centers that underwent thyroidectomy with CLND for PTC within the period 2016-2019 were retrospectively analyzed. Univariate and multivariate analysis were performed to examine risk factors associated with CNM. A nomogram for predicting CNM was established, thereafter internally and externally validated. Results Seven variables were found to be significantly associated with CNM and were used to construct the model. These were as follows: thyroid capsular invasion, multifocality, creatinine > 70 μmol/L, age < 40, tumor size > 1 cm, body mass index < 22, and carcinoembryonic antigen > 1 ng/mL. The nomogram had good discrimination with a concordance index of 0.854 (95% confidence interval [CI], 0.843 to 0.867), supported by an external validation point estimate of 0.825 (95% CI, 0.793 to 0.857). A decision curve analysis was made to evaluate nomogram and ultrasonography for predicting CNM. Conclusion A validated nomogram utilizing readily available preoperative variables was developed to predict the probability of central lymph node metastases in patients presenting with PTC. This nomogram may help surgeons make appropriate surgical decisions in the management of PTC, especially in terms of whether prophylactic CLND is warranted.
AC-SPWM-Cycloconverter Based on An Extended Chopper Scheme
Qianzhi Zhou,Weihua Wu,Jianwei Lin 전력전자학회 2007 ICPE(ISPE)논문집 Vol.- No.-
A novel cycloconverter based on chopper scheme is proposed, which is entirely different from the former cycloconverters based on phase-shift control, so leading to higher power factor than that of the latter, also in price of minimum power device numuber. Two kinds methods are derived for determining the relationships between Duty-Cycle and other parameters by means of different Area-Equivalent criteria. The single and 3-phase topologies and the ac-SPWM control strategy are introduced, which can realize variable frequency and variable voltage operation at the same time. Also some key simulations and experimental results show the validity of the conversion as well as the applicable prospect of the new cycloconverter-category.
Xiaomin Liu,Chengbin Yang,Jing Liu,Jianwei Liu,Rui Hu,Hongwei Lian,Guimiao Lin,Liwei Liu,Ken-Tye Yong,Ling Ye 한국생물공학회 2015 Biotechnology and Bioprocess Engineering Vol.20 No.4
The optimization of aldose reductase (AR) expression levels and tracking of the AR expression sites within the cell is an essential step in developing a platform for the effective production of aldose reductase inhibitors (ARIs). In this study, we have demonstrated the use of both immunocytochemistry and quantum dots-based immunofluorescence techniques for observing and detecting the expression level and localization of AR in the cytoplasm and cell membrane of a eukaryotic cell model with high levels of AR protein expression. Our results show that high expression levels of human AR can be achieved using the eukaryotic cell model that we have developed. The overexpressed AR can be used for translational studies of hAR and the screening of ARIs. More importantly, the use of the established quantum dots-based immunofluorescence technique in the intracellular labeling of AR allows the determination of the expression and distribution of the AR gene. Overall, the use of the interdisciplinary approach of both genetic engineering and quantum dot-based immunofluorescence allows not only the effective production of a desired protein, but also the determination of the cellular localization of such an expressed protein.