Zhejiang Industry & Trade Vocational College
Zhejiang Industry & Trade Vocational College
Yan M.,Huazhong University of Science and Technology |
Yan M.,Hubei Key Laboratory of Medical Information Analysis and Tumor Diagnosis & Treatment |
Liu H.,Huazhong University of Science and Technology |
Xu X.,Huazhong University of Science and Technology |
And 8 more authors.
International Journal of Imaging Systems and Technology | Year: 2017
The multi-atlas patch-based label fusion (LF) method mainly focuses on the measurement of the patch similarity which is the comparison between the atlas patch and the target patch. To enhance the LF performance, the distribution probability about the target can be used during the LF process. Hence, we consider two LF schemes: in the first scheme, we keep the results of the interpolation so that we can obtain the labels of the atlas with discrete values (between 0 and 1) instead of binary values in the label propagation. In doing so, each atlas can be treated as a probability atlas. Second, we introduce the distribution probability of the tissue (to be segmented) in the sparse patch-based LF process. Based on the probability of the tissue and sparse patch-based representation, we propose three different LF methods which are called LF-Method-1, LF-Method-2, and LF-Method-3. In addition, an automated estimation method about the distribution probability of the tissue is also proposed. To evaluate the accuracy of our proposed LF methods, the methods were compared with those of the nonlocal patch-based LF method (Nonlocal-PBM), the sparse patch-based LF method (Sparse-PBM), majority voting method, similarity and truth estimation for propagated segmentations, and hierarchical multi-atlas LF with multi-scale feature representation and label-specific patch partition (HMAS). Based on our experimental results and quantitative comparison, our methods are promising in the magnetic resonance image segmentation. © 2017 Wiley Periodicals, Inc. Int J Imaging Syst Technol, 27, 23–32, 2017. © 2017 Wiley Periodicals, Inc.
Ozan S.,RMIT University |
Ozan S.,Bozok University |
Lin J.,Jilin University |
Lin J.,Zhejiang Industry & Trade Vocational College |
And 2 more authors.
Journal of the Mechanical Behavior of Biomedical Materials | Year: 2017
In this study, a new series of Ti-Ta-Zr-Nb alloys (Ti-38.3Ta-22Zr-8.1Nb, Ti-38.9Ta-25Zr-5Nb, Ti-39.5Ta-28Zr-2.5Nb, designated TTZN-1, TTZN-2, TTZN-3, respectively) with high elastic strain and high mechanical strength have been developed as alternatives to conventional orthopedic implant materials. The TTZN alloys have been designed using the electronic parameters of the alloying elements, combined with the approaches of the electron-to-atom ratio (e/a) and molybdenum equivalence (Moeq). X-ray diffraction analysis has revealed that all the TTZN alloys are comprised of a single β phase, however, transmission electron microscopy observations revealed that ω and β phases co-existed in the microstructure. The compression strains of the TTZN alloys range from 22% to 36% and the compression strength from 1787 to 1807 MPa. The tensile Young's modulus, elastic strain and yield strength are 73.12 ± 4.43, 74.98 ± 2.19 and 76.62 ± 2.38 (GPa); 1.57 ± 0.27, 1.25 ± 0.27 and 1.29 ± 0.16 (%); and 1107.42 ± 144.68, 932.11 ± 195.22 and 953.58 ± 120.76 MPa for TTZN-1, TTZN-2 and TTZN-3, respectively. Further, all the TTZN alloys exhibit excellent cytocompatibility as their cell adhesion density is higher than that of CP-Ti. This study demonstrates that these TTZN alloys can be anticipated to be promising candidate for orthopedic implant materials due to their high mechanical strength and high elastic strain. © 2017 Elsevier Ltd
PubMed | Zhejiang Industry & Trade Vocational College, Swinburne University of Technology, CSIR - Central Electrochemical Research Institute, Deakin University and National Institute of Nutrition ICMR
Type: | Journal: Colloids and surfaces. B, Biointerfaces | Year: 2014
Biodegradable magnesium-zirconia-calcium (Mg-Zr-Ca) alloy implants were coated with Collagen type-I (Coll-I) and assessed for their rate and efficacy of bone mineralization and implant stabilization. The phases, microstructure and mechanical properties of these alloys were analyzed using X-ray diffraction (XRD), optical microscopy and compression test, respectively, and the corrosion behavior was established by their hydrogen production rate in simulated body fluid (SBF). Coll-I extracted from rat tail, and characterized using fourier transform infrared (FT-IR) spectroscopy, was used for dip-coating the Mg-based alloys. The coated alloys were implanted into the femur bones of male New Zealand white rabbits. In vivo bone formation around the implants was quantified by measuring the bone mineral content/density (BMC/BMD) using dual-energy X-ray absorptiometry (DXA). Osseointegration of the implant and new bone mineralization was visualized by histological and immunohistochemical analysis. Upon surface coating with Coll-I, these alloys demonstrated high surface energy showing enhanced performance as an implant material that is suitable for rapid and efficient new bone tissue induction with optimal mineral content and cellular properties. The results demonstrate that Coll-I coated Mg-Zr-Ca alloys have a tendency to form superior trabecular bone structure with better osteoinduction around the implants and higher implant secondary stabilization, through the phenomenon of contact osteogenesis, compared to the control and uncoated ones in shorter periods of implantation. Hence, Coll-I surface coating of Mg-Zr-Ca alloys is a promising method for expediting new bone formation in vivo and enhancing osseointegration in load bearing implant applications.
Shi X.,Zhejiang Industry & Trade Vocational College
International Journal of Simulation: Systems, Science and Technology | Year: 2016
CTR (Click Through Rate) is generally considered as a core indicator in measuring the effect and the ROI (Return On Investment) of Internet ads by the charging mode of CPM (Cost Per Mile). By utilizing relevant theories and research methodologies of modern informatics, the study aims to determine the characteristics of promotion that information is having and the impact on CTR by means of mathematical inference. The functional relationship between them is further explored by quantitative analysis through practical efficiency testing, data statistics and regression analysis on the Internet. The conclusion of the research could be a reference or an instruction for advertisers in designing their Internet ads, so as to improve the transfer efficiency of promotion information and raise their CTR and eventually the ROI. © 2016, UK Simulation Society. All rights reserved.
Munir K.S.,RMIT University |
Zheng Y.,Shanghai JiaoTong University |
Zhang D.,Shanghai JiaoTong University |
Zhang D.,Northeastern University China |
And 4 more authors.
Materials Science and Engineering A | Year: 2017
Titanium (Ti) metal matrix composites (TMCs) reinforced with multi-walled carbon nanotubes (MWCNTs) were prepared by spark plasma sintering (SPS). Different concentrations (0.5 wt% and 1.0 wt%) of MWCNTs were dispersed into the Ti matrix by high energy ball milling (HEBM) and solution ball milling (SBM). The impact energy provided to the powder mixtures during the dispersion processing was quantified and optimized to disperse MWCNTs into Ti matrix. The effect of dispersion processing parameters on the sp2 C-C network in MWCNTs, resultant microstructures and mechanical properties of TMCs was investigated. The interfacial reactions between MWCNTs and Ti matrix were controlled by retaining the crystallinity of MWCNTs during the processing stages of TMCs. The defects originated in MWCNTs during the synthesis of TMCs were quantified and their relationship was established with the strengthening efficiency of the MWCNTs in TMCs. The strengthening efficiency of MWCNTs in the composites consolidated from the powder mixtures with pre-sonicated MWCNTs were significantly enhanced as opposed to the composites consolidated from the powder mixtures prepared via solely HEBM process. © 2017 Elsevier B.V.
Gao Y.,Zhejiang Industry & Trade Vocational College |
Fu Q.,Sichuan University |
Niu L.,Zhejiang Industry & Trade Vocational College |
Shi Z.,Zhejiang Industry & Trade Vocational College
Journal of Materials Science | Year: 2015
The interfacial adhesion is a significant factor for improving mechanical properties of filler-reinforced polymer composites. In this work, the as-spun and hot-stretched poly(phenylene sulfide) (PPS) and multi-walled carbon nanotubes (MWCNTs) composite fibers were prepared. Tensile test showed that large enhancements in tensile strength and modulus were achieved in hot-stretched samples. The strong interfacial interaction leading to the effective load transferring was realized in hot-stretched composite fibers. Further analysis showed that the strong interfacial adhesion might be the result of the formation of π–π interaction between the benzene ring of PPS and the surface of MWCNTs with the help of hot-stretching, which could be the most important reason for the remarkable mechanical enhancement of the hot-stretched composite fibers. © 2015, Springer Science+Business Media New York.
Zhang J.,Wenzhou Vocational & Technical College |
Zhang J.,Zhejiang Industry & Trade Vocational College |
Shi K.,Huazhong University of Science and Technology
Zhongguo Jixie Gongcheng/China Mechanical Engineering | Year: 2015
An autonomous shop floor control system based on wireless sensor network was proposed to cope with the unforeseen inside and outside disturbances occurring frequently. In this system, the physical objects such as the parts and machines were enriched with competencies and abilities for communicating, computing and decision-making by sensor nodes embedding. A pheromone based control algorithm that imitated ants foraging behavior was developed to make the parts autonomously deciding efficient processing operations and routing paths. To demonstrate the feasibility and advantages of the proposed control system, a prototype implementation was developed, and experiments were made with this prototype implementation. The experimental results illustrate the advantages of the proposed approach and its capacity to surmount perturbations. ©, 2015, China Mechanical Engineering Magazine Office. All right reserved.
Xia S.-X.,Zhejiang Industry & Trade Vocational College
Tien Tzu Hsueh Pao/Acta Electronica Sinica | Year: 2015
The paper proposes a new three-phase four-wire multilevel inverter. Besides the conventional six-switch three-phase full-bridge inverter output, the inverter cascades to a half bridge configuration and has a bootstrap circuit with the load neutral line connecting to the anode of input power. Under the ripple-tracing segmental SPWM(Sinusoidal Pulse Width Modulation), the cascaded half-bridge electricity is obtained when the bootstrap circuit works. The circuit topology structure and its control method reduce the independent direct-current power sources of the multilevel inverter and raise the inverter output voltage. Using the piecewise calculation method, the paper analyzes the ripples and current of the bootstrap capacitor with regular sampling SPWM modulation, and the harmonic waves generated. The analyses and experiments in this paper show that a bootstrap capacitor's capacitance, charging loop resistance, load and modulation degree can affect the capacitor's ripples and current. ©, 2015, Chinese Institute of Electronics. All right reserved.
Xia S.,Zhejiang Industry & Trade Vocational College
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | Year: 2015
A new five-level half-bridge cascaded Inverter is presented. It is derived from the traditional H-Bridge by cascading the first-level half-bridge on the two half-bridges and connecting the bootstrap components between the upper and lower cascades. By using the CPS-SPWM, the bootstrap circuit will supply the power for the cascaded half-bridge, and it is not need independent DC power supply, which raises the output voltage of the inverter. On the applications of the inversion of the solar cell, storage cell, super-capacitor and other DC power supplies, the new inverter will decrease the amounts of the cells in series of the power branch. The effect of the load, modulation index, electric resistance of charge circuit and the capacity of the bootstrap electric capacitor on the ripple voltage the bootstrap electric capacitor, charging current and output harmonic wave of the inverter is analyzed by using infinitesimal method. By further analysis and experiments, we verify that it is the multilevel inverter is verified to be a kind of inverter with high voltage utilization and less voltage requirements. ©, 2015, Science Press. All right reserved.
PubMed | Jilin University, Bozok University, RMIT University, Japan National Institute of Materials Science and Zhejiang Industry &Trade Vocational College
Type: | Journal: Scientific reports | Year: 2016
Titanium alloys are receiving increasing research interest for the development of metallic stent materials due to their excellent biocompatibility, corrosion resistance, non-magnetism and radiopacity. In this study, a new series of Ti-Ta-Hf-Zr (TTHZ) alloys including Ti-37Ta-26Hf-13Zr, Ti-40Ta-22Hf-11.7Zr and Ti-45Ta-18.4Hf-10Zr (wt.%) were designed using the d-electron theory combined with electron to atom ratio (e/a) and molybdenum equivalence (Mo