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Advances in Manufacturing 2014年第1期2卷 3-12页

作者： Qi-jie Zhao Peng Cao Da-Wei tu School of Mechatronics Engineering and Automation Shanghai Key Laboratory of Intelligent Manufacturing and RoboticsShanghai university

Correctly coding materials and identifying characters marked on materials are very important for steel manufacturing industry to realize informatization management and intelligent manufacturing. However, the steel products manufacturing is often in a high temperature environment, and there are a lot of material storage and retrieval processes, workers are not easily close to the environment and complete tasks, so it is a great challenge to automatically mark and identify characters on the steel products. This paper presents a framework of label characters marking and management for steel materials, furthermore, a kind of marked characters online detection and tracking method has been provided based on machine vision. In addition, some experiments have been done in BaoSteel to mark characters on hot billets and recognize them in multi situations, and the results show that the proposed method is practical, and has provided a helpful exploration in obtaining accurate fundamental data for the intelligent manufacturing system in steelworks.

关键词： Intelligent manufacturing Enterprisesinformatization Label character marking Machinevision Marked character recognition

Data-Aided Frequency Offset Estimation with Narrowband Interference

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Journal of Beijing Institute of Technology 2017年第1期26卷 100-105页

作者： jie yang Jiahua Cao Hang tu Jing Luo School of Information and Electronics Beijing Institute of Technology Beijing 100081 China

An algorithm for carrier frequency offset estimation with narrowband interference in burstmode transmissions is *** algorithm is data-aided and has a feedforward structure that can be easily implemented *** principle of the algorithm is based on a properly designed training sequence and an interpolation *** results indicate that the estimation range is about ±20% of the symbol *** performance is satisfactory for a signal-to-noise ratio（SNR）as low as -13 dB and the mean square error（MSE）is approximately irrelevant to signal-to-interference ratio（SIR）values over -20 dB.

关键词： synchronization frequency offset estimation narrowband interference

Analysis of rainfall runoff characteristics from a subtropical urban lawn catchment in South-east China

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Frontiers of Environmental Science & Engineering 2012年第4期6卷 531-539页

作者： Jinliang HUANG Zhenshun tu Pengfei DU Qingsheng LI jie LIN Environmental Science Research Center Xiamen UniversityXiamen 361005China Department of Environmental Science and Engineering Tsinghua UniversityBeijing 100084China Fujian Institute of Oceanography Xiamen 361012China

Characteristics of rainfall runoff from a 3.26 hm^2 urban catchment with predominant land-use as lawn in Xiamen City, South-east China were investigated and analyzed. Water quality and quantity measurements of rainfall runoff were conducted for ten rainfall events over the period March, 2008 to April, 2009. The results indicated that chemical oxygen demand （COD） and total phosphorus （TP） were the major pollutants with event mean concentrations of 56.09 and 0.44mg.L^-1. From hydrograph and pollutograph analysis of two typical rainfall events, it was clear that the peak rainfall preceded the peak flowrate by about 15-20 min. Meanwhile, concentrations of major pollutants showed multiple peaks and these peaks usually preceded peak flowrate. There were no distinctive first-flush effects except for the rainfall events with the longest rainfall duration and largest runoff volume, which was verified by the fact that the first 30% runoff volume （FF30） carried 39.36% of the total suspended solids （TSS） load, 35.17% of the COD load, 28.13% of the TP load and 39.03% of the nitrate nitrogen load. Multivariate regression analysis further demonstrated that the total runoffvolume had a positive correlation with the FF30 of TSS and COD.

关键词： rainfall runoff first flush pollution characteristics urban lawn catchment

Preparation, morphology and luminescence properties of Gd_2O_2S:Tb with different Gd_2O_3 raw materials

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Rare Metals 2019年第3期38卷 221-226页

作者： yu-jie Ding Peng-De Han Li-Xi Wang Qi-tu Zhang College of Materials Science and Engineering Nanjing Tech University School of Materials Engineering Yancheng Institute of Technology

The sulfide fusion method was used to synthesize Gd_2 O_2 S:Tb phosphors using commercial Gd_2 O_3 and freshly prepared Gd_2 O_3, respectively. The freshly prepared Gd_2 O_3 was synthesized from Gd_2 O(GO_3)_2·H_2 O precursor prepared by homogeneous precipitation *** structure and morphology of the composites were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM) and energy dispersive spectroscopy(EDS). The result shows that the Gd_2 O_2 S:Tb phosphor prepared by commercial Gd2 O3(GOST-A) presents agglomerated particles with average particle size of2.1 μm; however, Gd_2 O_2 S:Tb produced from as-prepared Gd_2 O_3(GOST-B) tends to form regular hexagon particles with the average particle size of 1 μm. Furthermore, Gd3+and Tb3+ contents in GOST-B are higher than that in GOST-A. In addition, fluorescent properties were analyzed by fluorescent spectrophotometer. It is indicated that similar excitation and emission spectra can be obtained from the two phosphors, but the luminescence intensity of GOST-B is higher than that of GOST-A.

关键词： Precursor Phosphor Luminescence Homogeneous precipitation Sulfide fusion

Single-structure 3-axis Lorentz force magnetometer based on an AlN-on-Si MEMS resonator

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Microsystems & Nanoengineering 2024年第3期10卷 75-86页

作者： Cheng tu Xu-heng Ou-yang ying-jie Wu Xiao-sheng Zhang School of Integrated Circuit Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China

This work presents a single-structure 3-axis Lorentz force magnetometer(LFM)based on an AlN-on-Si MEMS *** operation of the proposed LFM relies on the flexible manipulation of applied excitation currents in different directions and frequencies,enabling the effective actuation of two mechanical vibration modes in a single device for magnetic field measurements in three ***,the excited out-of-plane drum-like mode at 277 kHz is used for measuring the x-and y-axis magnetic fields,while the in-plane square-extensional mode at 5.4 MHz is used for measuring the z-axis magnetic *** different configurations of applied excitation currents ensure good crossinterference immunity among the three *** to conventional capacitive LFMs,the proposed piezoelectric LFM utilizes strong electromechanical coupling from the AlN layer,which allows it to operate at ambient pressure with a high *** understand and analyze the measured results,a novel equivalent circuit model for the proposed LFM is also reported in this work,which serves to separate the effect of Lorentz force from the unwanted capacitive *** demonstrated 3-axis LFM exhibits measured magnetic responsivities of 1.74 ppm/mT,1.83 ppm/mT and 6.75 ppm/mT in the x-,y-and z-axes,respectively,which are comparable to their capacitive counterparts.

关键词： resonator Lorentz structure

In-situ preparation of robust self-lubricating composite coating from thermally sprayed ceramic template

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Journal of Advanced Ceramics 2023年第2期12卷 357-372页

作者： Zhichao WU Shuangjian LI Xiujuan FAN Florian VOGEL jie MAO Xiaohui tu Institute of Advanced Wear&Corrosion Resistant and Functional Materials Jinan UniversityGuangzhou 510632China Institute of New Materials Guangdong Academy of SciencesNational Engineering Laboratory of Modern Materials Surface Engineering TechnologyGuangzhou 510650China

The self-lubricating ceramic coatings that can control friction and wear have attracted researchers’widespread ***,the poor interfacial bonding between lubricants and ceramics and the deterioration of mechanical properties due to a tribological design limit their practical ***,a robust self-lubricating coating was fabricated by an in-situ synthesis of MoS_(2)/C within inherent defects of thermally sprayed yttria-stabilized zirconia(ySZ)*** edge-pinning by noncoherent endows hybrid coatings with excellent interfacial strength,increasing their hardness(HV)and cohesive ***,owing to the formation of a well-covered robust lubricating film at a frictional interface,a coefficient of friction(COF)can be reduced by 79.6%to 0.15,and a specific wear rate(W)drops from 1.36×10^(−3) to 6.27×10^(−7) mm^(3)·N^(−1)·m^(−1).Combining outstanding mechanical properties and tribological performance,the hybrid coating exhibits great application potential in controlling friction and ***,this strategy of introducing the target materials into the inherent defects of the raw materials to improve the relevant properties opens new avenues for the design and preparation of composite materials.

关键词： self-lubricating ceramic coatings thermal spray in-situ synthesis MoS_(2)/C friction and wear mechanical properties

Automatic three-dimensional reconstruction based on four-view stereo vision using checkerboard pattern

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Journal of Central South University 2017年第5期24卷 1063-1072页

作者： XIONG jie ZHONG Si-dong LIU yong tu Li-fen School of Electronic Information Wuhan University School of Physics and Electronic Information Engineering Hubei Engineering University

An automatic three-dimensional(3D) reconstruction method based on four-view stereo vision using checkerboard pattern is presented. Mismatches easily exist in traditional binocular stereo matching due to the repeatable or similar features of binocular images. In order to reduce the probability of mismatching and improve the measure precision, a four-camera measurement system which can add extra matching constraints and offer multiple measurements is applied in this work. Moreover, a series of different checkerboard patterns are projected onto the object to obtain dense feature points and remove mismatched points. Finally, the 3D model is generated by performing Delaunay triangulation and texture mapping on the point cloud obtained by four-view matching. This method was tested on the 3D reconstruction of a terracotta soldier sculpture and the Buddhas in the Mogao Grottoes. Their point clouds without mismatched points were obtained and less processing time was consumed in most cases relative to binocular matching. These good reconstructed models show the effectiveness of the method.

关键词： three-dimensional reconstruction four-view stereo vision checkerboard pattern dense point

Science Letters:Determination of benzalkonium chloride in viscous ophthalmic drops of azithromycin by high-performance liquid chromatography

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2009年第12期10卷 877-882页

作者： yan SHEN Sheng-jie XU Shi-chun WANG Jia-sheng tu Department of Pharmaceutics China Pharmaceutical University Nanjing 210009 China Productivity Center of Jiangsu Province Nanjing 210042 China

A high-performance liquid chromatography （HPLC） system was used in the reversed phase mode for the determination ofbenzalkonium chloride （BKC） in azithromycin viscous ophthalmic drops. A Venusil-XBP（L）-C18 （150 mm×4.6 mm, 5 gm） column was used at 50℃. The mobile phase consisted of a mixture of methanol-potassium phosphate （16：5, v/v）. Two sample preparation methods were compared. The results suggested that, compared with an extraction procedure, a deproteinization procedure was much quicker and more convenient. Using the deproteinization procedure for sample preparation, calibration curves were linear in the range 5.0-50μg/ml. The within-day and inter-day coefficients of variation were less than 10%. The average recoveries were determined as 96.70%, 98.52%, and 97.96% at concentrations of 10.0, 30.0, and 50.0 μg/ml, respectively. Variability in precision did not exceed 5%. In conclusion, this HPLC method using a simple sample treatment procedure appears suitable for monitoring BKC content in azithromycin viscous ophthalmic drops.

关键词： Benzalkonium chloride High-performance liquid chromatography Azithromycin Viscous ophthalmic drops

Single-centre study comparing standard apical dissection with a modified technique to facilitate vesico-urethral anastomosis during laparoscopic radical prostatectomy

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Asian Journal of Andrology 2011年第3期13卷 494-498,515页

作者： Xin Gao Xiao-yong Pu jie Si-tu Wen-Tao Huang Department of Urology the Third Affiliated Hospital Sun Yat-Sen University Guangzhou 510630 China

A modified apical dissection of the prostate to improve the efficiency of vesico-urethral anastomosis （VUA） in laparoscopic radical prostatectomy （LRP） was reported. A total of 42 patients were randomly selected and enrolled in this study. A standard LRP was performed in 21 patients （group 1）, whereas a novel, modified apical dissection of the prostate in LRP was performed in another 21 patients （group 2）. Surgical data, total operative time, VUA time, extravasation rate, catheterisation time, occurrence of anastomotic strictures, and the early and late continence rates were analysed statistically. No differences in clinical or pathological characteristics were determined between the two groups. The total operative time, VUA time, blood loss and catheterisation time were lower in group 2, which received the novel, modified technique compared with group 1, which received the standard technique to dissect the apex of the prostate （P〈0.01 for each variable）. Regarding the extravasation rate and the occurrence of anastomotic strictures, no significant differences were found between the two groups （P〉0.0.05 for each）. After catheter removal, a statistically significant difference in the continence rates was present at 3 and 30 days post operation in the two groups （P〈0.01, respectively）. At 90 days post operation, the difference, although still present, was no longer statistically significant （P〉0.05）. The novel, modified apical dissection of the prostate facilitates the VUA and significantly improves the efficacy of the procedure and early restoration of continence.

关键词： continence laparoscopic technique radical prostatectomy vesico-urethral anastomosis

Antioxidant and Anti-aging Activities of Silybum Marianum Protein Hydrolysate in Mice Treated with D-galactose

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Biomedical and Environmental Sciences 2017年第9期30卷 623-631页

作者： ZHU Shu yun JIANG Ning tu jie yANG Jing ZHOU yue School of Food and Biological Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina JiangsuHengshun Group Co.Ltd. Zhenjiang 212000JiangsuChina Institute of Vegetables Jiangsu Academy ofAgricultural SciencesNanjing 210014JiangsuChina College of Biotechnology Jiangsu University of Scienceand TechnologyZhenjiang 212018JiangsuChina

Objective In the present study, we investigated the antioxidant and anti‐aging effects of Silybum marianum protein hydrolysate（SMPH） in D‐galactose‐treated mice. Methods D‐galactose（500 mg/kg body weight） was intraperitoneally injected daily for 7 weeks to accelerate aging, and SMPH（400, 800, 1,200 mg/kg body weight, respectively） was simultaneously administered orally. The antioxidant and anti‐aging effects of SMPH in the liver and brain were measured by biochemical assays. Transmission electron microscopy（TEM） was performed to study the ultrastructure of liver mitochondria. Results SMPH decreased triglyceride and cholesterol levels in the D‐galactose‐treated mice. It significantly elevated the activities of superoxide dismutase（SOD） and glutathione peroxidase（GSH‐Px）, and total antioxidant capacity（T‐AOC）, which were suppressed by D‐galactose. Monoamine oxidase（MAO） and malondialdehyde（MDA） levels as well as the concentrations of caspase‐3 and 8‐OHd G in the liver and brain were significantly reduced by SMPH. Moreover, it increased Bcl‐2 levels in the liver and brain. Furthermore, SMPH significantly attenuated D‐galactose‐induced liver mitochondrial dysfunction by improving the activities of Na＋‐K＋‐ATPase and Ca2＋‐Mg2＋‐ATPase as well as mitochondrial membrane potential（ΔΨm） and fluidity. TEM showed that the degree of liver mitochondrial damage was significantly decreased by SMPH. Conclusion The results indicated that SMPH protects against D‐galactose‐induced accelerated aging in mice through its antioxidant and anti‐aging activities.

关键词： Silybum marianum protein hydrolysate Antioxidant Anti‐aging D‐galactose