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Optimal multi-degree reduction of C-Bézier surfaces with constraints Article

Lian ZHOU, Xin-hui LIN, Hong-yan ZHAO, Jun CHEN

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 12,   Pages 2009-2016 doi: 10.1631/FITEE.1700458

Abstract: We propose an optimal approach to solve the problem of multi-degree reduction of C-Bézier surfaces inThe control points of the degree-reduced C-Bézier surfaces can be explicitly obtained by using a matrixoperation that is based on the transfer matrix of the C-Bézier basis.

Keywords： C-Bé     zier surfaces     Degree reduction     Boundary constraints    

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Comments on the special issue on tropical crops of

Luiz J C B CARVALHO

Frontiers of Agricultural Science and Engineering 2016, Volume 3, Issue 4,   Pages 375-376 doi: 10.15302/J-FASE-2016129

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Uncertainty propagation analysis by an extended sparse grid technique

JIA, C. JIANG, C. M. FU, B. Y. NI, C. S. WANG, M. H. PING

Frontiers of Mechanical Engineering 2019, Volume 14, Issue 1,   Pages 33-46 doi: 10.1007/s11465-018-0514-x

Abstract: In this paper, an uncertainty propagation analysis method is developed based on an extended sparse grid technique and maximum entropy principle, aiming at improving the solving accuracy of the high-order moments and hence the fitting accuracy of the probability density function (PDF) of the system response. The proposed method incorporates the extended Gauss integration into the uncertainty propagation analysis. Moreover, assisted by the Rosenblatt transformation, the various types of extended integration points are transformed into the extended Gauss-Hermite integration points, which makes the method suitable for any type of continuous distribution. Subsequently, within the sparse grid numerical integration framework, the statistical moments of the system response are obtained based on the transformed points. Furthermore, based on the maximum entropy principle, the obtained first four-order statistical moments are used to fit the PDF of the system response. Finally, three numerical examples are investigated to demonstrate the effectiveness of the proposed method, which includes two mathematical problems with explicit expressions and an engineering application with a black-box model.

Keywords： uncertainty propagation analysis     extended sparse grid     maximum entropy principle     extended Gauss integration     Rosenblatt transformation     high-order moments analysis    

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Non-thermal plasma for exhaust gases treatment

,Fernando GÓMEZ B.,Joel PACHECO P.,Arturo COLÍN C.,Víctor SÁNCHEZ-MENDIETA,Ricardo VALDIVIA B.,José HUERTAS C.,Hilda FRÍAS P.

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 3,   Pages 301-305 doi: 10.1007/s11465-015-0344-z

Abstract:

This article describes a study on a non-thermal plasma device to treat exhaust gases in an internal combustion engine. Several tests using a plasma device to treat exhaust gases are conducted on a Honda GX200-196 cm3 engine at different rotational speeds. A plasma reactor could be efficient in degrading nitrogen oxides and particulate matter. Monoxide and carbon dioxide treatment is minimal. However, achieving 1%–3% degradation may be interesting to reduce the emission of greenhouse gases.

Keywords： plasma treatment     NOx     CO     CO2     particulate matter     vehicle    

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Statistical modeling of radiolytic (

Muthu Iswarya, B. Nirkayani, A. Kavithakani, V. C. Padmanaban

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 3, doi: 10.1007/s11783-019-1126-3

Abstract:

Linear, interactive and quadratic effects of process parameters were studied.

Degradation of Ofloxacin (Ofx) was related with G value of irradiation process.

The synergistic effect of H2O2 on lower dose of g-irradiation was established.

The process follows pseudo first order with dose constant (d = 0.232 kGy–1).

Keywords： Ofloxacin     Gamma irradiation     Face centered central composite design     Reaction kinetics     Gas Chromatography-Mass spectrum    

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Synthesis of ［RMIm］PF6（R=P, B, C6）ionic liquid under microwave irradiation and research of its conductivity

He Yongfu

Strategic Study of CAE 2008, Volume 10, Issue 9,   Pages 92-95

Abstract: bromize([BMIm]Br), 1-propyl-3-methylimidazolium bromize([PMIm]Br), 1-hexyl-3-methylimidazolium bromize ([C6MImmethyl-imidazolium hexafluorophosphate([PMIm]PF6),1-Hexane-3-methyl-imidazolium hexafluorophosphate([C6MIm

Keywords： ionic liquids     microwave irradiation     conductivity     [BMIm]PF6     [PMIm]PF6     [C6MIm]PF6    

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Shear design of high strength concrete prestressed girders

LABIB,Hemant B. DHONDE,Thomas T. C. HSU,Y. L. MO

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 4,   Pages 373-387 doi: 10.1007/s11709-014-0087-7

Abstract: Normal strength prestressed concrete I-girders are commonly used as the primary superstructure components in highway bridges. However, shear design guidelines for high strength PC girders are not available in the current structural codes. Recently, ten 7.62 m (25 feet) long girders made with high strength concrete were designed, cast, and tested at the University of Houston (UH) to study the ultimate shear strength and the shear concrete contribution ( ) as a function of concrete strength ( ). A simple semi-empirical set of equations was developed based on the test results to predict the ultimate shear strength of prestressed concrete I-girders. The UH-developed set of equations is a function of concrete strength ( ), web area ( ), shear span to effective depth ratio ( / ), and percentage of transverse steel ( ). The proposed UH-Method was found to accurately predict the ultimate shear strength of PC girders with concrete strength up to 117 MPa (17000 psi) ensuring satisfactory ductility. The UH-Method was found to be not as overly conservative as the ACI-318 (2011) code provisions, and also not to overestimate the ultimate shear strength of high strength PC girders as the AASHTO LRFD (2010) code provisions. Moreover, the proposed UH-Method was found fairly accurate and not exceedingly conservative in predicting the concrete contribution to shear for concrete strength up to 117 MPa (17000 psi).

Keywords： shear design     high strength concrete     prestressed girders     full-scale tests    

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A simple umbelliferone based fluorescent probe for the detection of nitroreductase

Adam C. Sedgwick, Alex Hayden, Barry Hill, Steven D. Bull, Robert B. P. Elmes, Tony D. James

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 2,   Pages 311-314 doi: 10.1007/s11705-017-1697-0

Abstract: A simple nitrobenzyl-umbelliferone (NCOU1) was synthesised containing a nitroreductase (NTR) trigger moiety. The presence of NTR, resulted in the fragmentation of the parent molecule and release of the highly emissive fluorophore umbelliferone an NTR-catalyzed reduction of the nitro group. In the presence of the NTR enzyme, NCOU1 gave rise to a 5-fold increase in fluorescence intensity at 455 nm and was selective for NTR over other reductive enzymes. These results indicate that NCOU1 can be used as a simple assay for the detection of NTR.

Keywords： fragmentation     NCOU1     NTR     nitroreductase     nitrobenzyl-umbelliferone    

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MicroRNAs and hepatitis viruses

Gang LI MD , Xiaojia XIONG MM ,

Frontiers of Medicine 2009, Volume 3, Issue 3,   Pages 265-270 doi: 10.1007/s11684-009-0055-0

Abstract: The hepatitis B and C viruses are common causes of liver disease worldwide.Elucidating the mechanisms of virus-host interactions in hepatitis B and C is very important in diagnosisThis article reviews the current knowledge of viral hepatitis (B and C type) at the level of miRNA and

Keywords： microRNA     hepatitis B virus     hepatitis C virus    

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A facile synthesis of high activity cube-like Pt/carbon composites for fuel cell application

Reza B. MOGHADDAM, Samaneh SHAHGALDI, Xianguo LI

Frontiers in Energy 2017, Volume 11, Issue 3,   Pages 245-253 doi: 10.1007/s11708-017-0492-4

Abstract: The Pt grow with Vulcan XC-72 or Ketjen black, respectively, and then treated for 5.5 h at 185ºC (i.eOptimization of the Pt /K composites leads to Pt /K that has been treated for 10 h at 185ºC.Furthermore, Pt /K is compared with two commercial Pt/C catalysts, Tanaka Kikinzoku Kogyo (TKK), andJohnson Matthey (JM)Pt/C catalysts.The TKK Pt/C has a higher EASA than Pt /K, as expected from their relative particles sizes (3–4 nm vs

Keywords： synthesis     cube-like Pt     Pt/C composite     catalyst     impedance    

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NKT cells in liver diseases

Shasha Zhu, Huimin Zhang, Li Bai

Frontiers of Medicine 2018, Volume 12, Issue 3,   Pages 249-261 doi: 10.1007/s11684-018-0622-3

Abstract: study, we summarize recent findings on biology of natural killer T cells and their roles in hepatitis Bvirus and hepatitis C virus infection, autoimmune liver diseases, alcoholic liver disease, nonalcoholic

Keywords： natural killer T cells     hepatitis B virus and hepatitis C virus infection     autoimmune liver diseases     alcoholic    

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Valveless pumping using a two-stage impedance pump

C.-C. LEE, Y. A. ABAKR, K.-C. WOO

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 3,   Pages 311-318 doi: 10.1007/s11465-013-0270-x

Abstract:

Impedance pump is defined as a type of valveless pumping mechanism, where an elastic tube is joined with a tube of different impedance, a periodic asymmetrical compression on part of the elastic tube will produce a unidirectional flow. Numerical and experimental studies had been conducted in the past, but little experimental work was found to exploit the principle of multi-stage impedance pumping for fluid transportation. This paper concentrates on the fluid behavior for an open-loop two-stage system experimentally. The aim of this work is to have an insight on the deliverable head and pumping rate of an open-loop two-stage impedance pumping system. This paper generally investigates the effect of different parameters towards the generation of unidirectional flows and composite flow of two opposite directions. Results obtained are of significant values.

Keywords： valveless pumping     open-loop     two-stage     unidirectional     composite    

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Current hepatitis B treatment guidelines and future research directions

Jonathan Skupsky,Ke-Qin Hu

Frontiers of Medicine 2014, Volume 8, Issue 2,   Pages 145-157 doi: 10.1007/s11684-014-0335-1

Abstract:

Hepatitis B virus (HBV) infection causes a tremendous clinical burden across the world with more than

Keywords： chronic hepatitis B     HBV treatment guidelines     APASL guidelines     EASL guidelines     AASLD guidelines    

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Clinical characteristics and risk factors of COVID-19 patients with chronic hepatitis B: a multi-center

Frontiers of Medicine 2022, Volume 16, Issue 1,   Pages 111-125 doi: 10.1007/s11684-021-0854-5

Abstract: 19 patients, the association of liver injury caused by specific subtype especially chronic hepatitis B

Keywords： COVID-19     chronic hepatitis B     liver injury     coagulation dysfunction    

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Design of GPRS Data Terminal Based on S3C2410

Sun Xueyong

Strategic Study of CAE 2007, Volume 9, Issue 12,   Pages 94-96

Abstract: hardware structure and working process of the embedded Internetconnected platform, which regards S3C2410

Keywords： GPRS；embedded Internet；S3C2410；SIM100-E    

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Title Author Date Type Operation

Optimal multi-degree reduction of C-Bézier surfaces with constraints

Lian ZHOU, Xin-hui LIN, Hong-yan ZHAO, Jun CHEN

Journal Article

Comments on the special issue on tropical crops of

Luiz J C B CARVALHO

Journal Article

Uncertainty propagation analysis by an extended sparse grid technique

JIA, C. JIANG, C. M. FU, B. Y. NI, C. S. WANG, M. H. PING

Journal Article

Non-thermal plasma for exhaust gases treatment

,Fernando GÓMEZ B.,Joel PACHECO P.,Arturo COLÍN C.,Víctor SÁNCHEZ-MENDIETA,Ricardo VALDIVIA B.,José HUERTAS C.,Hilda FRÍAS P.

Journal Article

Statistical modeling of radiolytic (

Muthu Iswarya, B. Nirkayani, A. Kavithakani, V. C. Padmanaban

Journal Article

Synthesis of ［RMIm］PF6（R=P, B, C6）ionic liquid under microwave irradiation and research of its conductivity

He Yongfu

Journal Article

Shear design of high strength concrete prestressed girders

LABIB,Hemant B. DHONDE,Thomas T. C. HSU,Y. L. MO

Journal Article

A simple umbelliferone based fluorescent probe for the detection of nitroreductase

Adam C. Sedgwick, Alex Hayden, Barry Hill, Steven D. Bull, Robert B. P. Elmes, Tony D. James

Journal Article

MicroRNAs and hepatitis viruses

Gang LI MD , Xiaojia XIONG MM ,

Journal Article

A facile synthesis of high activity cube-like Pt/carbon composites for fuel cell application

Reza B. MOGHADDAM, Samaneh SHAHGALDI, Xianguo LI

Journal Article

NKT cells in liver diseases

Shasha Zhu, Huimin Zhang, Li Bai

Journal Article

Valveless pumping using a two-stage impedance pump

C.-C. LEE, Y. A. ABAKR, K.-C. WOO

Journal Article

Current hepatitis B treatment guidelines and future research directions

Jonathan Skupsky,Ke-Qin Hu

Journal Article

Clinical characteristics and risk factors of COVID-19 patients with chronic hepatitis B: a multi-center

Journal Article

Design of GPRS Data Terminal Based on S3C2410

Sun Xueyong

Journal Article