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Vessels Segmentation in Angiograms Using Convolutional Neural Network: A Deep Learning Based Approach

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Computer Modeling in Engineering & Sciences 2023年第7期136卷 241-255页

作者： Sanjiban Sekhar Roy Ching-Hsien hsu Akash Samaran Ranjan Goyal Arindam Pande Valentina E.Balas School of Computer Science and Engineering Vellore Institute of TechnologyVellore632014India Department of Computer Science and Information Engineering Asia UniversityTaichung41354Taiwan Department of Medical Research China Medical University HospitalChina Medical UniversityTaichung406Taiwan Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology School of Mathematics and Big DataFoshan UniversityFoshan528000China Medica Superspecialty Hospital Kolkata700099India Automation and Applied Informatics Aurel Vlaicu University of AradArad310130Romania

Coronary arterydisease(CAD)has become a significant causeof heart attack,especially amongthose 40yearsoldor *** is a need to develop new technologies andmethods to deal with this *** researchers have proposed image processing-based solutions for CADdiagnosis,but achieving highly accurate results for angiogram segmentation is still a *** different types of angiograms are adopted for CAD *** paper proposes an approach for image segmentation using ConvolutionNeuralNetworks(CNN)for diagnosing coronary artery disease to achieve state-of-the-art *** have collected the 2D X-ray images from the hospital,and the proposed model has been applied to *** augmentation has been performed in this research as it’s the most significant task required to be initiated to increase the dataset’s ***,the images have been enhanced using noise removal techniques before being fed to the CNN model for segmentation to achieve high *** the output,different settings of the network architecture undoubtedly have achieved different accuracy,among which the highest accuracy of the model is 97.61%.Compared with the other models,these results have proven to be superior to this proposed method in achieving state-of-the-art results.

关键词： Angiogram convolution neural network coronary artery disease diagnosis of CAD image segmentation

Design and Development of Composite Plywood that Integrates Fire Resistance,Water Resistance and Wear Resistance

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Journal of Renewable Materials 2023年第5期11卷 2333-2344页

作者： Xingyu Liang Xiaoyu Gu Myint Myint Paing hsu Yuhang He Rongzhuo Zhang Conghui Cai Zheng Wang College of Materials Science and Engineering Nanjing Forestry UniversityNanjing210037China College of Civil Engineering Nanjing Forestry UniversityNanjing210037China Jiangsu Shancong Wood Co. Ltd.Lianyungang222505China

In order to improve the fire resistance,water resistance and wear resistance of ordinary plywood products in the wood processing industry,three composite structures of plywood products S1,S2 and S3 were designed in this paper,and a reasonable production process was *** the physical and mechanical properties and fire resistance testing and technical and economic analysis,the applicability of composite plywood was *** results of the study showed that the physical mechanics of the three kinds of composite structure plywood met the standard requirements,and their fire resistance was far better than that of ordinary *** them,the S1 structural board had the best overall physical and mechanical *** S3 structural board showed the best fire resistance,which was about 1.9 times more than that of ordinary plywood,and the added cost was the *** thin cork board added to the S2 structural board had poor fire performance since the air in the cork board cavities had a certain combustion-supporting effect,which inhibited the fire resistance of high-pressure laminate(HPL)***,the additional cost of the S2 board was the highest,and its comprehensive performance was the *** S3 structural plywood product composed of HPL fireproof board with a thickness of about 1 mm in the surface layer and ordinary plywood with a thickness of about 12 mm in the core layer was the most cost-effective product,which could meet the needs of various fields such as construction,home furnishing,decoration and transportation.

关键词： Wear resistance plywood structural design and development physical and mechanical properties fire resistance

Thickness bound for nonlocal wide-field-of-view metalenses

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Light(Science & Applications) 2022年第12期11卷 3018-3027页

作者： Shiyu Li Chia Wei hsu Ming Hsieh Department of Electrical and Computer Engineering University of Southern CaliforniaLos AngelesCA 90089USA

Metalenses—flat lenses made with optical metasurfaces—promise to enable thinner,cheaper,and better imaging *** a sufficient angular field of view(FOV)is crucial toward that goal and requires a tailored incidentangle-dependent ***,we show that there is an intrinsic trade-off between achieving a desired broad-angle response and reducing the thickness of the *** the memory effect in disordered media,this thickness bound originates from the Fourier transform duality between space and *** can write down the transmission matrix describing the desired angle-dependent response,convert it to the spatial basis where its degree of nonlocality can be quantified through a lateral spreading,and determine the minimal device thickness based on such a required lateral *** approach is *** applied to wide-FOV lenses,it predicts the minimal thickness as a function of the FOV,lens diameter,and numerical *** bound is tight,as some inverse-designed multi-layer metasurfaces can approach the minimal thickness we *** work offers guidance for the design of nonlocal metasurfaces,proposes a new framework for establishing bounds,and reveals the relation between angular diversity and spatial footprint in multi-channel systems.

关键词： desired angular field

Effects of nanoscale features on infrared radiative properties of heavily doped silicon complex gratings

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Science China(Technological Sciences) 2010年第8期53卷 2207-2214页

作者： hsu PeiFeng Department of Mechanical and Aerospace Engineering Florida Institute of Technology

The infrared radiative properties of one heavily doped silicon complex grating and its corresponding four modified complex gratings with attached features at transverse magnetic wave incidence were numerically investigated by employing the finite-difference time-domain *** the complex grating,by properly choosing the carrier concentration and geometry,it exhibited a broadband absorptance peak at wavelengths between 7 and 12μm resulting from the excitation of surface plasmon *** for the four modified complex gratings,though absorptance spectra of the gratings almost remained unchanged, their locations shifted towards longer ***,the spectral absorptance peaks of two modified complex gratings were wider than that of the grating without attached *** broadened peaks could be partly attributed to the cavity resonance within the grating structures demonstrated by the electromagnetic fields and Poynting vectors ***,through comparing the spectral absorptances of complex gratings with two symmetrical square features in three sizes,it was shown that the peak wavelength shifted toward longer wavelengths with enlarged feature *** work theoretically laid a foundation for the optimized design and application of the infrared detector with high performance.

关键词： cavity resonance effect finite-difference time-domain modified complex gratings radiative property surface plasmon polaritons

SIMS Pb/Pb dating of Zr-rich minerals in lunar meteorites Miller Range 05035 and LaPaz Icefield 02224:Implications for the petrogenesis of mare basalt

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Science China Earth Sciences 2010年第3期53卷 327-334页

作者： hsu WeiBiao Faculty of Earth Sciences China University of Geosciences

Miller Range (MIL) 05035 and LaPaz Icefield (LAP) 02224 are unbrecciated lunar basalt meteorites. In this report, we studied their petrography and mineralogy and made in situ uranogenic Pb/Pb dating of Zr-rich minerals. Petrography and mineralogy of these two lunar meteorites are consistent with previous investigations. The zirconolite Pb/Pb age of MIL 05035 is 3851±8 Ma (2σ), in excellent agreement with previous reports. This age suggests that MIL 05035 could be paired with Asuka 881757, a low-Ti mare basalt meteorite. The magmatic event related to MIL 05035 was probably due to the late heavy impact bom- bardment on the moon around 3.9 Ga. One baddeleyite grain in LAP 02224 shows a large variation of Pb/Pb age, from 3109±29 to 3547±21 Ma (2σ), much older than the whole-rock age of the same meteorite (~3.02±0.03 Ga). The other baddeleyite grain in LAP 02224 has an age of 3005±17 Ma (2σ). The result indicates that the minimum crystallization age of LAP 02224 is ~3.55 Ga and the younger ages could reflect late thermal disturbance on U-Pb system.

关键词： Pb/Pb dating SIMS zirconolite and baddeleyite lunar meteorite low-Ti mare basalt

Detecting surface geostrophic currents using wavelet filter from satellite geodesy

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Science China Earth Sciences 2007年第6期50卷 918-926页

作者： hsu HouTse Institute of Geodesy and Geophysics Chinese Academy of Sciences (CAS)

According to the features of spatial spectrum of the dynamic ocean topography (DOT),wavelet filter is proposed to reduce short-wavelength and noise signals in DOT. The surface geostrophic currents calculated from the DOT models filtered by wavelet filter in global and Kuroshio regions show more detailed information than those from the DOT models filtered by Gaussian filter. Based on a satellite gravity field model (CG01C) and a gravity field model (EGM96),combining an altimetry-derived mean sea surface height model (KMSS04),two mean DOT models are estimated. The short-wavelength and noise signals of these two DOT models are removed by using wavelet filter,and the DOT models asso-ciated global mean surface geostrophic current fields are calculated separately. Comparison of the surface geostrophic currents from CG01C and EGM96 model in global,Kuroshio and equatorial Pacific regions with that from oceanography,and comparison of influences of the two gravity models errors on the precision of the surface geostrophic currents velocity show that the accuracy of CG01C model has been greatly improved over pre-existing models at long wavelengths. At large and middle scale,the surface geostrophic current from satellite gravity and satellite altimetry agrees well with that from oceanography,which indicates that ocean currents detected by satellite measurement have reached relatively high precision.

关键词： satellite altimetry satellite gravity wavelet filter geostrophic current

Relationship Between Measured Friction Coefficients and Two Tread Groove Design Parameters for Footwear Pads

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Tsinghua Science and Technology 2006年第6期11卷 712-719页

作者： LI Kai Way chen Chin Jung LIN Ching-Hua hsu Yao Wen Liberty Mutual Research Institute for Safety 71 Frankland RoadHopkinton MA 01748 USA Department of Industrial ManagementChung-Hua University770 Wu Fu RoadSec 2Hsin ChuTaiwan 300China Department of Industrial Management Chung-Hua University770 Wu Fu RoadSec 2 Hsin ChuTaiwan 300 China Industrial Engineering and Management Department TA-Hwa Institute of Technology1 Dahua RoadQionglin ShiangHsinchu CountyTaiwan 307China

The shoe sole geometrical design parameters are believed to be important factors affecting the coefficient of friction （COF） between the shoe/floor interface. This study is concerned with the relationship between the measured COF and the tread groove orientation and width on the footwear pad. Friction measurements using the Brungraber Mark Ⅱ slipmeter were conducted. Six tread groove width/orientations designs on the footwear pads under 27 footwear material/floor/contamination conditions were tested. The results show that tread orientation and width affect the measured COF significantly. Wider grooved footwear pads result in higher COF values and footwear pads with tread grooves perpendicular to the friction measurement direction have higher COF values. A regression model using measured COF as the dependent variable and tread groove width, groove orientation, footwear material, floor, and contamination conditions as independent variables was established. The models are significant at p〈0.0001 with R^2 of 0.97, which may be used in predicting the COF at the shoe-floor interface .

关键词： slipping and falling incidents friction measurement tread groove design Brungraber Mark Ⅱ slipmeter

Improving stability of MXenes

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Nano Research 2022年第7期15卷 6551-6567页

作者： Jizhou Jiang Saishuai Bai Jing Zou Song Liu Jyh-Ping hsu Neng Li Guoyin Zhu Zechao Zhuang Qi Kang Yizhou Zhang School of Environmental Ecology and Biological Engineering School of Chemistry and Environmental EngineeringKey Laboratory of Green Chemical Engineering Process of Ministry of EducationEngineering Research Center of Phosphorus Resources Development and Utilization of Ministry of EducationWuhan Institute of TechnologyWuhan 430205China Key Laboratory of Rare Mineral Ministry of Natural ResourcesGeological Experimental Testing Center of Hubei ProvinceWuhan 430034China Institute of Chemical Biology and Nanomedicine(ICBN) State Key Laboratory of Chemo/Biosensing and ChemometricsCollege of Chemistry and Chemical EngineeringCollege of BiologyHunan UniversityChangsha 410082China Department of Chemical Engineering “National Taiwan University”Taipei 10617TaiwanChina State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China Institute of Advanced Materials and Flexible Electronics(IAMFE) School of Chemistry and Materials ScienceNanjing University of Information Science&TechnologyNanjing 210044China Department of Chemistry Tsinghua UniversityBeijing 100084China Department of Polymer Science and Engineering Shanghai Key Laboratory of Electrical Insulation and Thermal AgeingShanghai Jiao Tong UniversityShanghai 200240China

Due to their superior hydrophilicity and conductivity,ultra-high volumetric capacitance,and rich surface-chemistry properties,MXenes exhibit unique and excellent performance in catalysis,energy storage,electromagnetic shielding,and life *** they are derived from ceramics(MAX phase)through etching,one of the challenges in MXenes preparation is the inevitable exposure of metal atoms on their surface and embedding of anions and *** the as-obtained MXenes are always in a thermodynamically metastable state,they tend to react with trace oxygen or oxygen-containing groups to form metal oxides or degrade,leading to sharply declined activity and impaired ***,improving the stability of MXenesbased materials is of practical significance in relevant ***,there lacks a comprehensive review in the literature on relevant *** help promote the wide applications of MXenes,we review from the following aspects:(i)insights into the factors affecting the stability of MXenes-based materials,including oxidation of MXenes flakes,stability of MXenes colloidal solutions,and swelling and degradation of MXenes thin-film,(ii)strategies for enhancing the stability of MXenes-based materials by optimizing MAX phase synthesis and modifying the MXenes preparation,and(iii)techniques for further increasing the stability of freshly prepared MXenes-based materials via controlling the storage conditions,and forming shielding on the surface and/or edge of MXenes ***,some outlooks are proposed on the future developments and challenges of highly active and stable *** aim to provide guidance for the design,preparation,and applications of MXenes-based materials with excellent stability and activity.

关键词： MXenes stability oxidation swelling and degradation shielding strategies

Infected aortic and iliac aneurysms:Clinical manifestations in the emergency departments of two hospitals in southern Taiwan,China

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World Journal of Emergency Medicine 2017年第2期8卷 121-125页

作者： Chang-Chih Tsai Chien-Chin hsu Kuo-Tai chen Emergency Department Chi-Mei Medical Center Department of Biotechnology Southern Tainan University of Technology Department of Emergency Medicine Taipei Medical University

BACKGROUND: Accurate diagnosis of infected aortic and iliac aneurysms is often delayed, hampering timely treatment and potentially resulting in a fatal consequence. The aim of this study was to discover useful clinical features that can help physicians to identify these ***: We reviewed the discharge notes from two hospitals and identifi ed all patients who had a diagnosis of infected aneurysms of the thoracoabdominal aorta and iliac arteries between July 2009 and December 2013. Eighteen patients, aged from 41 to 93, were reviewed. Only 6 patients were diagnosed accurately in their fi rst visit to our ***: Most patients had at least one underlying illness, and it took 1 to 30(9.9±6.5) days for physicians to diagnose their infected aneurysm. Localized pain and fever were the two most commonly presented symptoms. The majority(92%) of isolated microorganisms were gram-negative bacilli, including Salmonella spp, Klebsiella pneumoniae, and Escherichia coli. Two of the 3 patients who underwent non-operative therapy died, and all of the patients who underwent a combination of medical and operative therapies ***: We suggest that physicians liberally use computed tomography scans on patients with unknown causes of pain and inflammatory processes. A combination of surgical and medical treatments is indicated for all patients with infected aortic and iliac aneurysms.

关键词： Infected aneurysm Salmonella Misdiagnosis Emergency department Clinical manifestation