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Non-Contact Ultrasonic Quality Measurements of Food Products

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Non-Contact Ultrasonic Quality Measurements of Food Products

An Automated Ultrasonic NDT System for In-Situ Inspection of Wind Turbine Blades

国际农业工程大会

作者： tat hean gan Prakash Pallav David A.Hutchins School of Engineering University of Warwick Gibbet Hill Road Coventry CV4 7AL UK. School of Engineering University of Warwick Gibbet Hill Road Coventry CV4 7AL UK. School of Engineering University of Warwick Gibbet Hill Road Coventry CV4 7AL UK.

＜正＞ There is growing pressure within the food industry to improve food quality measurements, particularly within packaged food products. This inspection may include looking for physical changes occurring with time, non-uniformity of the product, or the presence of foreign body contamination. The need for reliable inspection is becoming increasingly critical due to the continued automation within the industry and the shift in consumer choice towards more prepared foods.

关键词： Non-contact ultrasonic imaging agglomeration temperature measurement liquid level foreign body imaging and physiochemical change.

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Journal of Mechanics Engineering and Automation 2014年第10期4卷 781-788页

作者： tat-hean gan Guoliang Ye Ben Neal Alex Boot Vassilios Kappatos Cem Selcuk Brunel Innovation Centre Brunel University London UB8 3PH UK TWI Ltd. Cambridge CB21 6AL UK

It is crucial to maintain wind turbine blades regularly, due to the high stress leading to defects or damage. Conventional methods require shipping the blades to a workshop for off-site inspection, which is extremely time-consuming and very costly. This work investigates the use of pulse-echo ultrasound to detect internal damages in wind turbine blades without the necessity to ship the blades off-site. A prototype 2D ultrasonic NDT （non-destructive testing） system has been developed and optimised for in-situ wind turbine blade inspection. The system is designed to be light weight so it can be easily carried by an inspector onto the wind turbine blade for in-situ inspection. It can be operated in 1D A-scan, 2D C-scan or 3D volume scan. A software system has been developed to control the automated scanning and show the damage areas in a 2D/3D map with different colours so that the inspector can easily identify the defective areas. Experiments on GFRP （glass fibre reinforced plastics） and wind turbine blades （made of GFRP） samples showed that internal defects can be detected. The main advantages of this system are fully automated 2D spatial scanning and the ability to alert the user to the damage of the inspected sample. It is intended to be used for in-situ inspection to save maintenance time and hence considered to be economically beneficial for the wind energy industry.

关键词： Ultrasound non-destructive testing wind turbine blade glass fibre reinforced plastics defect detection.

Modelling of Guided Ultrasonic Wave in Aircraft Wiring

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Modelling of Guided Ultrasonic Wave in Aircraft Wiring

顾客导向和创新导向对企业绩效的影响机制研究

17th World Conference on Non-Destructive Testing

作者： Yousef GHARAIBEH Slim SOUA Septimonette CHAN tat-hean gan Graham EDWARDS NDT Technology Group TWI LtdGranta ParkGreat AbingtonCambridge CB21 6ALUK School of Engineering and Design Brunel University UxbridgeMiddlesexUB8 3PHUK.

＜正＞Degradation and failure of aircraft wiring insulation results in potential flight safety critical system failure or in smoke and fire due to ***,there is a need to detect any defect within the physical structure of the aged wire before any malfunction takes *** are different types of Non-Destructive Testing （NDT）techniques available for aircraft wiring inspection and one of them is the ultrasonic guided waves *** guided wave ultrasonics,inspection can be carried out for a long distance from a single *** order to understand the behaviour of guided waves in aircraft wiring,a modelling tool was used to simulate and predict the behaviour of guided wave characteristics in wires with respect to the stiffness property of the *** defects were introduced into the ***,the modelling results have been validated experimentally.

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南开管理评论 2009年第3期12卷 67-73,93页

作者：郭贤达孙瑾吴坚陈荣北京大学光华管理学院市场营销系对外经济贸易大学国际商学院中国人寿清华大学经济管理学院市场营销系

在市场导向相关研究的基础上,本文探索了顾客导向(Customer Orientation)以及创新导向(Innovation Orientation)经由组织学习(Organizational Learning)对公司绩效(Firm Performance)的影响。通过对欧洲的390家制造企业的调查,发现顾客导向和创新导向都对组织学习产生正向影响,组织学习提高了公司的新产品绩效(New Product Performance),最终提升了公司绩效。最后,文章讨论了本研究的理论和实践意义,以及未来的研究方向。

关键词：顾客导向创新导向组织学习新产品绩效公司绩效

中国城区青少年对广告价值的评价:前因和后果

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心理学报 2008年第2期40卷 193-200页

作者：张红霞李佳嘉郭贤达北京大学光华管理学院北京100871

通过对北京市7所中学366名学生的调查,探讨了青少年对广告价值的评价以及何种因素影响青少年对广告价值的评价,广告价值的评价是否会进一步影响其决策等问题。运用AMOS4.0建立结构方程模型对研究假设进行检验,结果表明:(1)青少年对广告... 详细信息

通过对北京市7所中学366名学生的调查,探讨了青少年对广告价值的评价以及何种因素影响青少年对广告价值的评价,广告价值的评价是否会进一步影响其决策等问题。运用AMOS4.0建立结构方程模型对研究假设进行检验,结果表明:(1)青少年对广告价值的评价直接影响到他们的决策意图;(2)在探讨广告价值的影响因素时发现,对广告的知觉因素(信息性和娱乐性)和青少年对广告以及广告商的社会认知(观看广告的社会动机和对广告劝服技巧的认识)对广告价值的影响作用也十分显著,信息性、娱乐性与社会动机都对广告价值产生积极影响,而对广告劝服技巧的认识则对广告价值产生显著的负面影响。

关键词：广告价值娱乐性信息性劝服技巧社会动机决策意图

Ultrahigh quantum efficiency photodetector and ultrafast reversible surface wettability transition of square In2O3 nanowires

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Nano Research 2017年第8期10卷 2772-2781页

作者： Ming Meng Xinglong Wu Xiaoli Ji Zhixing gan Lizhe Liu Jiancang Shen Paul K. Chu School of Physics and Telecommunication Engineering Zhoukou Normal University Zhoukou 466001 China Key Laboratory of Modern Acoustics MOE Institute of Acoustics Collaborative Innovation Center of Advanced Microstructures Notional Laboratory of Solid State Microstructures Nanjing University Nonjing 210093 China School of Electronic Science and Engineering Nanjing University Nanjing 210093 China Key Laboratory of Optoelectronic Technology of Jiangsu Province School of Physical Science and Technology Nanjing Normal University Nanjing 210023 China Department of Physics and Materials Science City University ofHong Kong Tat Chee Avenue Kowloon Hong Kong China

Due to a large surface-to-volume ratio, the optoelectronic performance of low- dimensional semiconductor nanostructure-based photodetectors depends in principle on chemisorption/photodesorption at the exposed surface, but practical examples that show such an effect are still unavailable. Some theoretical calculations have predicted that the {001} facets of In2O3 can effectively accumulate photogenerated holes under irradiation, providing a model material to examine whether the facet cutting of nanowires （NWs） can boost their optoelectronic performance. Herein, we present the design and construction of a novel nanowire-based photodetector using square In2O3 NWs with four exposed {001} crystal facets. The photodetector delivers excellent optoelectronic performance with excellent repeatability, fast response speed, high spectral responsivity （Rλ）, and high external quantum efficiency （EQE）. The Rλ and EQE values are as high as 4.8 × 10^6 A/W and 1.46 × 10^9%, respectively, which are larger than those of other popular semiconductor photodetectors. In addition, the square In2O3 NWs show hydrophobic wettability as manifested by a contact angle of 118° and a fast photoinduced reversible switching behavior is observed.

关键词： square In2O3 nanowires crystal facet photodetector reversible wettability transition

Surface spinel reconstruction to suppress detrimental phase transition for stable LiNi_(0.8)CO_(0.1)Mn_(0.1)O_(2) cathodes

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Nano Research 2023年第1期16卷 513-520页

作者： Qingmeng gan Ning Qin Zhiqiang Li Shuai Gu Kemeng Liao Kaili Zhang Li Lu Zhenghe Xu Zhouguang Lu Department of Materials Science and Engineering Shenzhen Key Laboratory of Interfacial Science and Engineering of MaterialsSouthern University of Science and TechnologyShenzhen 518055China Department of Mechanical Engineering National University of Singapore117575Singapore Department of Mechanical Engineering City University of Hong Kong83 Tat Chee AvenueHong Kong 999077China

Nickel-rich layered oxides are attractive cathode for lithium-ion batteries(LIBs)because of the high energy density and low *** critical problem is capacity fading caused by the highly reactive metastable phases under voltages of higher than 4.15 ***,we find that facile Ar/H2 plasma treating could produce oxygen vacancies that will readily transform into homogeneous spinel layer(~6 nm)on the LiNi_(0.8)CO_(0.1)Mn_(0.1)O_(2)(NCM811)surface after a few cycles of lithiation/delithiation *** to the structural matching between spinel and layered structure,the diffusion of Li ions could remain fast upon ***,the spinel layer is electrochemically inert,which guarantees surface stabilization and inhibits the detrimental phase transition from H2 to H3 at high *** the protection of the homogeneous spinel layer,the NCM_(811) electrode shows superior capacity retention of 91.2% after 200 cycles at the current density of 100 mA·g^(−1).This work proposes a novel strategy of surface reconstruction to stabilize nickel-rich layered oxide materials for LIBs.

关键词： lithium-ion batteries nickel-rich cathode surface spinel reconstruction phase transition superior stability

Additive manufacturing of Ni-based superalloys: Residual stress, mechanisms of crack formation and strategies for crack inhibition

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Nano Materials Science 2023年第1期5卷 53-77页

作者： Chuan Guo gan Li Sheng Li Xiaogang Hu Hongxing Lu Xinggang Li Zhen Xu Yuhan Chen Qingqing Li Jian Lu Qiang Zhu CityU-Shenzhen Futian Research Institute Shenzhen518045China Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhen518055China Department of Mechanical Engineering Shenyang National Laboratory for Materials ScienceGreater Bay Joint DivisionCity University of Hong KongTat Chee AvenueKowloonHong KongChina School of Materials and Energy Guangdong University of TechnologyGuangzhou510006China Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen518055China

The additive manufacturing(AM)of Ni-based superalloys has attracted extensive interest from both academia and industry due to its unique capabilities to fabricate complex and high-performance components for use in high-end industrial ***,the intense temperature gradient induced by the rapid heating and cooling processes of AM can generate high levels of residual stress and metastable chemical and structural states,inevitably leading to severe metallurgical defects in Ni-based *** are the greatest threat to these materials’integrity as they can rapidly propagate and thereby cause sudden and non-predictable ***,there is a need for a deeper understanding of residual stress and cracking mechanisms in additively manufactured Ni-based superalloys and ways to potentially prevent cracking,as this knowledge will enable the wider application of these unique *** this end,this paper comprehensively reviews the residual stress and the various mechanisms of crack formation in Ni-based superalloys during *** addition,several common methods for inhibiting crack formation are presented to assist the research community to develop methods for the fabrication of crack-free additively manufactured components.

关键词： Additive manufacturing Ni-based superalloys Residual stress Mechanisms of crack formation Methods of crack inhibition

A Peptide Binder of E3 Ligase Adaptor SPOP Disrupts Oncogenic SPOP-Protein Interactions in Kidney Cancer Cells

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Chinese Journal of Chemistry 2021年第2期39卷 274-280页

作者： Zhen Wang Hao Zhang Baoen Chen Sisheng Ouyang Tong Zheng Ran Zhou Ze Dong Yue Huang Tao Zhang Hualiang Jiang Jianhua gan Cheng Luo Cai-Guang Yang School of Chinese Materia Medica Nanjing University of Chinese MedicineNanjingJiangsu210023 China State Key Laboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai201203 China University of Chinese Academy of Sciences Beijing100049 China School of Pharmaceutical Science and Technology Hangzhou Institute for Advanced StudyUCASHangzhouZhejiang310024 China Shanghai Institute for Advanced Immunochemical Studies ShanghaiTech UniversityShanghai201210 China School of Life Sciences Fudan UniversityShanghai200433 China

The E3 ligase adaptor SPOP,overexpressed in the nucleus but frequently dislocated into the cytoplasm in all clear cell Renal Cell Carcinomas(ccRCC),serves as a regulatory hub to promote kidney cancer through the ubiquitination and degradation of multiple downstream cancer ***,our identification of a selective small-molecule inhibitor of the SPOP-phosphatase and tensin homolog(PTEN)interaction has demonstrated that the oncogenic SPOP-protein interaction would be a druggable target specific to ccRCC *** our knowledge,this is the first time such a small-molecule inhibitor has been ***,we have identified a peptide binder for the SPOP-MATH domain that disrupts the oncogenic SPOP-protein interactions in kidney cancer *** design and biophysical characterization yielded peptide Pep38 that binds to the MATH domain of SPOP and competes on PTEN-binding to SPOP in *** X-ray complex structure reveals that the peptide binder features the following combination:one,a mimic of the native peptide binder and two,an additionalβ-strand motif in sequence,which could contribute to increased binding *** order to improve cellular permeability,we fused Pep38 with the delivery peptide tat to prepare peptide tat38,which inhibits the endogenous substrate binding to SPOP and suppresses the proliferation of the ccRCC *** identification of the peptide inhibitors for SPOP-protein interactions provides further validation that the oncogenic SPOP-signaling pathway in ccRCC could be a druggable target specifically applicable to the therapy of kidney cancers.

关键词： SPOP Protein-protein interaction Clear cell Renal Cell Carcinomas Crystal structure Peptide inhibitor