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Applying Rational Envelope curves for skinning purposes

Kinga Kruppa,kruppa.kinga@inf.unideb.hu

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 2,   Pages 141-286 doi: 10.1631/FITEE.1900377

Abstract: Special curves in the Minkowski space such as Minkowski Pythagorean hodograph curves play an important role in computer-aided geometric design, and their usages are thoroughly studied in recent years. Bizzarri et al. (2016) introduced the class of Rational (RE) curves, and an method for Hermite data was presented, where the resulting RE curve yielded a rational boundary for the represented domain. We now propose a new application area for RE curves: of a discrete set of input s. We show that if we do not choose the Hermite data correctly for , then the resulting RE curves are not suitable for . We introduce a novel approach so that the obtained curves touch each at previously defined points of contact. Thus, we overcome those problematic scenarios in which the location of touching points would not be appropriate for purposes. A significant advantage of our proposed method lies in the efficiency of trimming offsets of boundaries, which is highly beneficial in computer numerical control machining.

Keywords： Medial axis transform     Envelope     Interpolation     Skinning     Circle    

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Identification of faults through wavelet transform vis-à-vis fast Fourier transform of noisy vibration

Deepak PALIWAL,Achintya CHOUDHURY,T. GOVANDHAN

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 2,   Pages 130-141 doi: 10.1007/s11465-014-0298-6

Abstract: For this purpose, the performances of envelope detection with fast Fourier transform (FFT) and continuouswavelet transform (CWT) of vibration signals produced from a bearing with defects on inner race and

Keywords： Fault detection     spline wavelet     continuous wavelet transform     fast Fourier transform    

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Five-axis rough machining for impellers

Ruolong QI, Weijun LIU, Hongyou BIAN, Lun LI

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 1,   Pages 71-76 doi: 10.1007/s11465-009-0010-4

Abstract: The tool axis vector is confirmed based on flank milling using a simple method that could eliminate global

Keywords： five-axis     impeller     tool-path     planning     flank milling     ruled surface    

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Kinematic error separation on five-axis NC machine tool based on telescoping double ball bar

Min WANG, Jianzhong HU, Tao ZAN

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4,   Pages 431-437 doi: 10.1007/s11465-010-0110-1

Abstract: homogeneous transformation matrix (HTM) method are applied in establishing the kinematic error model of five-axismachining tool with two-axis turntable.Based on this model, a new method for the kinematic error separation in five-axis numerical control (In this study, three types of simultaneous three-axis control motions are designed for each rotary axisIn the measurement, two translational axes and one rotary axis are simultaneously controlled to keep

Keywords： error modeling     error separation     telescoping double ball bar     five-axis numerical control (NC) machining    

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Optimization model for rotor blades of horizontal axis wind turbines

LIU Xiong, CHEN Yan, YE Zhiquan

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 4,   Pages 483-488 doi: 10.1007/s11465-007-0084-9

Abstract: This paper presents an optimization model for rotor blades of horizontal axis wind turbines.

Keywords： population     extended     algorithm     developed optimization     accurate    

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A reversibility-gain model for integer Karhunen-Loève transform design in video coding

Xing-guo ZHU,Lu YU

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 10,   Pages 883-891 doi: 10.1631/FITEE.1500071

Abstract: Karhunen-Loève transform (KLT) is the optimal transform that minimizes distortion at a given bit allocationthe ‘reversibility’ is modeled according to distortion analysis in using forward and inverse integer transformIt not only measures how invertible a transform is, but also bounds the distortion introduced by thenon-orthonormal integer transform process.The ‘gain’ means transform coding gain (TCG), which is a widely used criterion for transform design in

Keywords： Integer transform     Karhunen-Loè     ve transform (KLT)     Integer-KLT     Transform coding     Video coding    

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Application of Porous Aerostatic Bearings in Three-axis Table

Du Jinming

Strategic Study of CAE 2005, Volume 7, Issue 1,   Pages 65-68

Abstract: Three-axis table is the equipment that has high precision and is used to check, demarcate and establish

Keywords： aerostatic bearings     porous     orifice restricted     three-axis table    

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Performance of vertical axis water turbine with eye-shaped baffle for pico hydropower

Zhuohuan HU, Dongcheng WANG, Wei LU, Jian CHEN, Yuwen ZHANG

Frontiers in Energy 2022, Volume 16, Issue 4,   Pages 683-696 doi: 10.1007/s11708-020-0689-9

Abstract: A series of inline pico hydropower systems, which could be used in confined space, especially for water distribution networks (WDNs), was designed and investigated. The turbine with an eye-shaped vertical water baffle was developed to evaluate the hydraulic performance. A three-dimensional dynamic mesh was employed and the inlet velocity was considered as the inlet boundary condition, whereas the outlet boundary was set as the outflow. Then, numerical simulations were conducted and the standard turbulence model was found to be the best capable of predicting flow features through the comparison with the experimental results. The effects of the opening diameter of the water baffle and installation angle of the rotor on the flow field in the turbine were investigated. The results suggested that the water baffle opening at = 30 mm and the rotor at a 52° angle could achieve the highest efficiency of 5.93%. The proper eye-shaped baffle not only accelerates the fluid flow and generates positive hydrodynamic torque, but also eliminates the flow separation. The scheme proposed in this paper can be exploited for practical applications in the water pipelines at various conditions and power requirements.

Keywords： vertical axis water turbine     eye-shaped     vertical water baffle     pico hydropower    

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Determination of the feasible setup parameters of a workpiece to maximize the utilization of a five-axis

Aqeel AHMED, Muhammad WASIF, Anis FATIMA, Liming WANG, Syed Amir IQBAL

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 2,   Pages 298-314 doi: 10.1007/s11465-020-0621-3

Abstract: The maximum utilization of five-axis machine tools depends upon the cutting system’s geometry, the configurationa mathematical model has been developed to determine the workpiece’s feasible location in the five-axisavoiding the number of iterations, which are usually performed to eliminate the global collision and axisIn this research, a generic arrangement of the five-axis machine tool has been selected.

Keywords： workpiece setup parameter     five-axis     space utilization     setup parameters     machine tool    

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Role of the forkhead transcription factor FOXO-FOXM1 axis in cancer and drug resistance

Fung Zhao, Eric W.-F. Lam

Frontiers of Medicine 2012, Volume 6, Issue 4,   Pages 376-380 doi: 10.1007/s11684-012-0228-0

Abstract: An understanding of the role and regulation of the FOXO-FOXM1 axis will impact directly on our knowledge

Keywords： FOXO3a     FOXM1     transcription factor     cancer     drug resistance     tumorigenesis    

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Spontaneous firing properties of rat medial vestibular nucleus neurons in brain slices by infrared visual

XIA Jiao, KONG Weijia, ZHU Yun, ZHOU Yan, ZHANG Yu, GUO Changkai

Frontiers of Medicine 2008, Volume 2, Issue 3,   Pages 264-268 doi: 10.1007/s11684-008-0050-x

Abstract: describes the preparation procedure of brainstem slices and the spontaneous firing properties of rat medial

Keywords： resistance     infrared     infrared videomicroscopy     depressive     after-hyperpolarization potential    

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Estimation of power in low velocity vertical axis wind turbine

Sampath S. S.,Sawan SHETTY,Chithirai Pon Selvan M.

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 2,   Pages 211-218 doi: 10.1007/s11465-015-0338-x

Abstract:

The present work involves in the construction of a vertical axis wind turbine and the determination

Keywords： wind turbine     shaft design     power generation     generator    

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FMO3--TMAO axis modulates the clinical outcome in chronic heart-failure patients with reduced ejection

Frontiers of Medicine 2022, Volume 16, Issue 2,   Pages 295-305 doi: 10.1007/s11684-021-0857-2

Abstract: The association among plasma trimethylamine-N-oxide (TMAO), FMO3 polymorphisms, and chronic heart failure (CHF) remains to be elucidated. TMAO is a microbiota-dependent metabolite from dietary choline and carnitine. A prospective study was performed including 955 consecutively diagnosed CHF patients with reduced ejection fraction, with the longest follow-up of 7 years. The concentrations of plasma TMAO and its precursors, namely, choline and carnitine, were determined by liquid chromatography-mass spectrometry, and the FMO3 E158K polymorphisms (rs2266782) were genotyped. The top tertile of plasma TMAO was associated with a significant increment in hazard ratio (HR) for the composite outcome of cardiovascular death or heart transplantation (HR=1.47, 95% CI=1.13–1.91, P=0.004) compared with the lowest tertile. After adjustments of the potential confounders, higher TMAO could still be used to predict the risk of the primary endpoint (adjusted HR=1.33, 95% CI=1.01–1.74, P=0.039). This result was also obtained after further adjustment for carnitine (adjusted HR=1.33, 95% CI=1.01–1.74, P=0.039). The FMO3 rs2266782 polymorphism was associated with the plasma TMAO concentrations in our cohort, and lower TMAO levels were found in the AA-genotype. Thus, higher plasma TMAO levels indicated increased risk of the composite outcome of cardiovascular death or heart transplantation independent of potential confounders, and the FMO3 AA-genotype in rs2266782 was related to lower plasma TMAO levels.

Keywords： chronic heart failure     trimethylamine-N-oxide     flavin monooxygenase 3     single nucleotide polymorphism    

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Chidamide inhibits the NOTCH1-MYC signaling axis in T-cell acute lymphoblastic leukemia

Frontiers of Medicine 2022, Volume 16, Issue 3,   Pages 442-458 doi: 10.1007/s11684-021-0877-y

Abstract: In particular, chidamide inhibits the NOTCH1-MYC signaling axis by down-regulating the level of the intracellular

Keywords： T-cell acute lymphoblastic leukemia     HDAC inhibitor     chidamide     NOTCH1     MYC     ubiquitination    

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Effects of parenteral nutrition with and without GH on the GH/IGF-1 axis after hepatectomy in hepatocellular

CAO Jie, LUO Shimin, LIANG Lijian, LAI Jiaming, CHEN Shanming

Frontiers of Medicine 2007, Volume 1, Issue 3,   Pages 287-293 doi: 10.1007/s11684-007-0055-x

Abstract: Complex alterations in the GH/IGF-1 axis are thought to play an important role in the protein catabolismexplore the effects of parenteral nutrition (PN) with and without growth hormone (GH) on the GH/IGF-1 axisThese data indicate that rhGH+PN could ameliorate the changes in the GH/IGF-1 axis after hepatectomy

Keywords： control     function     production     surgical     Complex    

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Title Author Date Type Operation

Applying Rational Envelope curves for skinning purposes

Kinga Kruppa,kruppa.kinga@inf.unideb.hu

Journal Article

Identification of faults through wavelet transform vis-à-vis fast Fourier transform of noisy vibration

Deepak PALIWAL,Achintya CHOUDHURY,T. GOVANDHAN

Journal Article

Five-axis rough machining for impellers

Ruolong QI, Weijun LIU, Hongyou BIAN, Lun LI

Journal Article

Kinematic error separation on five-axis NC machine tool based on telescoping double ball bar

Min WANG, Jianzhong HU, Tao ZAN

Journal Article

Optimization model for rotor blades of horizontal axis wind turbines

LIU Xiong, CHEN Yan, YE Zhiquan

Journal Article

A reversibility-gain model for integer Karhunen-Loève transform design in video coding

Xing-guo ZHU,Lu YU

Journal Article

Application of Porous Aerostatic Bearings in Three-axis Table

Du Jinming

Journal Article

Performance of vertical axis water turbine with eye-shaped baffle for pico hydropower

Zhuohuan HU, Dongcheng WANG, Wei LU, Jian CHEN, Yuwen ZHANG

Journal Article

Determination of the feasible setup parameters of a workpiece to maximize the utilization of a five-axis

Aqeel AHMED, Muhammad WASIF, Anis FATIMA, Liming WANG, Syed Amir IQBAL

Journal Article

Role of the forkhead transcription factor FOXO-FOXM1 axis in cancer and drug resistance

Fung Zhao, Eric W.-F. Lam

Journal Article

Spontaneous firing properties of rat medial vestibular nucleus neurons in brain slices by infrared visual

XIA Jiao, KONG Weijia, ZHU Yun, ZHOU Yan, ZHANG Yu, GUO Changkai

Journal Article

Estimation of power in low velocity vertical axis wind turbine

Sampath S. S.,Sawan SHETTY,Chithirai Pon Selvan M.

Journal Article

FMO3--TMAO axis modulates the clinical outcome in chronic heart-failure patients with reduced ejection

Journal Article

Chidamide inhibits the NOTCH1-MYC signaling axis in T-cell acute lymphoblastic leukemia

Journal Article

Effects of parenteral nutrition with and without GH on the GH/IGF-1 axis after hepatectomy in hepatocellular

CAO Jie, LUO Shimin, LIANG Lijian, LAI Jiaming, CHEN Shanming

Journal Article