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Distribution system state estimation: an overview of recent developments Review Article

Gang WANG, Georgios B. GIANNAKIS, Jie CHEN, Jian SUN

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 1,   Pages 4-17 doi: 10.1631/FITEE.1800590

Abstract: To benchmark the performance of unbiased estimators, the Cramér-Rao lower bound is developed.

Keywords： State estimation     Cramér-Rao bound     Feasible point pursuit     Semidefinite relaxation     Proximal linear algorithm    

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Multi-objective optimization in a finite time thermodynamic method for dish-Stirling by branch and bound

Mohammad Reza NAZEMZADEGAN, Alibakhsh KASAEIAN, Somayeh TOGHYANI, Mohammad Hossein AHMADI, R.

Frontiers in Energy 2020, Volume 14, Issue 3,   Pages 649-665 doi: 10.1007/s11708-018-0548-0

Abstract: with post-expression of preferences is used for multi-objective optimizations while the branch and bound

Keywords： dish-Stirling     finite time model     branch and bound algorithm     multi-objective particle swarm optimization    

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A performance analysis of multi-satellite joint geolocation Article

Ding WANG,Shuai WEI,Ying WU

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 12,   Pages 1360-1387 doi: 10.1631/FITEE.1500285

Abstract: The theoretical analysis starts with Cramér–Rao bound (CRB) derivations for four localization scenarios

Keywords： Satellite geolocation     Time difference of arrival (TDOA)     Cramer-Rao bound (CRB)     Calibration sources    

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Effects of environmental factors on the production and release of matrix-bound phosphine from lake sediments

GENG Jinju, WANG Qiang, WANG Xiaorong, NIU Xiaojun

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 1,   Pages 120-124 doi: 10.1007/s11783-007-0022-4

Abstract: Results indicated that the elimination of matrix-bound phosphine was accelerated under initial pH 1 orC was the most favorable temperature for the production of matrix-bound phosphine.Oxygen showed little effect on matrix-bound phosphine.Matrix-bound phosphine concentrations in lake sediments were concluded to be dependent on a balance of
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Experimental evaluation of a 35 kVA downdraft gasifier

Ashok Jayawant Rao KECHE, Gaddale AMBA PRASAD RAO

Frontiers in Energy 2013, Volume 7, Issue 3,   Pages 300-306 doi: 10.1007/s11708-013-0247-9

Abstract: Energy conversion systems based on biomass are particularly interesting because biomass utilization effectively closes the carbon cycle besides achieving self-sustainability. Biomass is particularly useful for highly populated and agriculture dependent economic nations like China and India. A compact and cost effective downdraft gasification system was developed. The present paper describes an experimental investigation on a biomass based gasifier engine system with a capacity of 35 kVA for power generation application. The problem of cooling and cleaning the hot and dirty gas from the gasifier has been satisfactorily solved by the effective cooling and filtration system. The gasifier developed is observed to be operation friendly. The quality of gas was evaluated in terms of its composition, conversion efficiency and total particulate matter. The maximum output of the power plant was obtained at the combustion zone temperature of 850oC. The experimental investigations showed that the percentage reduction in total particulate matter is 89.32%. The conversion efficiency of the biomass gasifier is found to be dependent on the operation conditions and fuel properties of the gasifier. The optimum value of equivalence ratio was observed to be 0.3134 for achieving the maximum gas conversion efficiency of the present gasifier configuration.

Keywords： biomass     gasification     producer gas     equivalence ratio     total particulate matter     conversion efficiency of gasifier    

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Biomechanics of knee joint – A review

Bhaskar Kumar MADETI,Srinivasa Rao CHALAMALASETTI,S K Sundara siva rao BOLLA PRAGADA

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 2,   Pages 176-186 doi: 10.1007/s11465-014-0306-x

Abstract:

The present paper is to know how the work is carried out in the field of biomechanics of knee. Various model formulations are discussed and further classified into mathematical model, two-dimensional model and three-dimensional model. Knee geometry is a crucial part of human body movement, in which how various views of knee is shown in different planes and how the forces act on tibia and femur are studied. It leads to know the forces acting on the knee joint. Experimental studies of knee geometry and forces acting on knee shown by various researchers have been discussed, and comparisons of results are made. In addition, static and dynamic analysis of knee has been also discussed respectively to some extent.

Keywords： biomechanics     knee geometry     ligaments     squat     femorotibial joint     finite element method    

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Upper bound solution to seismic active earth pressure of submerged backfill subjected to partial drainage

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 6,   Pages 1480-1493 doi: 10.1007/s11709-021-0776-y

Abstract: The method comprises the following steps: i) determination of the total head, ii) upper bound solutionand the expressions of the seismic active earth thrust and pressure are derived by using the upper bound

Keywords： seismic active earth pressure     partial seepage flow     pore pressure     anisotropy     upper bound theorem    

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Effect of undercut on the lower bound stability of vertical rock escarpment using finite element and

Shuvankar DAS; Debarghya CHAKRABORTY

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 8,   Pages 1040-1055 doi: 10.1007/s11709-022-0841-1

Abstract: Lower bound finite element limit analysis in association with Power Cone Programming (PCP) is applied

Keywords： undercut     vertical escarpment     stability     Hoek-Brown yield criterion     PCP    

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Particle-bound polycyclic aromatic hydrocarbons in typical urban of Yunnan-Guizhou Plateau: Characterization

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 9, doi: 10.1007/s11783-022-1535-6

Abstract:

• The sampling was conducted in city on the Yunnan-Guizhou Plateau for one year.

Keywords： Particle-associated PAHs     Fine particle     Source appointment     Group analysis     Risk assessment     Biomass burning    

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Correction to: Effect of undercut on the lower bound stability of vertical rock escarpment using finite

Frontiers of Structural and Civil Engineering doi: 10.1007/s11709-023-0035-5

Abstract: Correction to: Effect of undercut on the lower bound stability of vertical rock escarpment using finite

Keywords： finite element power     stability rock escarpment    

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Fundamental buckling of circular plates with elastically restrained edges and resting on concentric rigid ring support

Lokavarapu Bhaskara Rao, Chellapilla Kameswara Rao

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 3,   Pages 291-297 doi: 10.1007/s11465-013-0255-9

Abstract:

This work presents the existence of buckling mode switching with respect to the radius of concentric rigid ring support. The buckling mode may not be axisymmetric as previously assumed. In general, the plate may buckle in an axisymmetric mode but when the radius of the ring support becomes small, the plate may buckle in an asymmetric mode. The optimum radius of the concentric rigid ring support for maximum buckling load is also determined. Introducing internal rigid ring support, when placed at an optimal position increases the elastic buckling load capacity by 149.39 percent. The numerical results obtained are in good agreement with the previously published data.

Keywords： buckling     circular plate     elastically restrained edge     rigid ring support     mode switching    

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Bearing and uplift capacities of under-reamed piles in soft clay underlaid by stiff clay using lower-bound

Mantu MAJUMDER, Debarghya CHAKRABORTY

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2,   Pages 537-551 doi: 10.1007/s11709-021-0708-x

Abstract: effectiveness of under-reamed piles in soft clay underlaid by stiff clay is numerically studied using the lower-bound

Keywords： bearing capacity     uplift capacity     under-reamed pile     clay     limit analysis    

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Frequencies of circular plate with concentric ring and elastic edge support

Lokavarapu Bhaskara RAO,Chellapilla Kameswara RAO

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 2,   Pages 168-176 doi: 10.1007/s11465-014-0299-5

Abstract:

Exact solutions for the flexural vibrations of circular plates having elastic edge conditions along with rigid concentric ring support have been presented in this paper. Values of frequency parameter for the considered circular plate are computed for different sets of values of elastic rotational and translation restraints and the radius of internal rigid ring support. The results for the first three modes of plate vibrations are computed and are presented in tabular form. The effects of rotational and linear restraints and the radius of the rigid ring support on the vibration behavior of circular plates are studied over a wide range of non-dimensional parametric values. The values of the exact frequency parameter presented in this paper for varying values of restraint parameters and the radius of the rigid ring support can better serve in design and as benchmark solutions to validate the numerical methods obtained by using other methods of solution.

Keywords： circular plate     frequency     elastic edge     rigid ring     mode switching    

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Sudden death due to arrhythmogenic right ventricular cardiomyopathy: Two case reports

CHEN Xinshan, ZHANG Yigu, RAO Guangxun, HUANG Guangzhao

Frontiers of Medicine 2007, Volume 1, Issue 3,   Pages 338-342 doi: 10.1007/s11684-007-0065-8

Abstract: Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a kind of primary myocardial disease characterized by the regional or global replacement of right ventricular myocardium by fatty and fibrolipomatous tissues. The ARVC, usually presenting with different clinical manifestations and pathological changes, were mainly seen in young men and is one of the main causes of sudden death in the young. Here two autopsied cases of Chinese men aged 30 and 23 years old who appeared healthy but died suddenly while at work are reported respectively. One of the victims had extensive and severe pathological changes in his heart involving the left ventricular wall as well as the ventricular septum and the right atrium. Not only was there a global fatty and fibrolipomatous tissue replacement of the right ventricular myocardia, but also mild sarcoplasmic coagulation in the myocardium and focal lymphocytic infiltration in the myocardial interstitium of the right ventricular wall. In addition, slight atherosclerosis of the coronary artery and intimal thickening of the sino-atrial node were observed. It is believed that there are no marked differences in the pathological changes of ARVC between Chinese patients and patients from western countries. The etiology and pathogenesis of ARVC could not be explained by a single cause or factor and they are probably related to various congenital and acquired causes or factors.

Keywords： sarcoplasmic coagulation     acquired     ventricular myocardium     sino-atrial     autopsied    

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Susceptibility of male and female Japanese medaka (

Nannan LIU, Mei MA, Yiping XU, Jinmiao ZHA, Kaifeng RAO, Zijian WANG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 1,   Pages 77-84 doi: 10.1007/s11783-012-0466-z

Abstract: 2,4,6-trichlorophenol (2,4,6-TCP) is a widespread probable human carcinogen and has been proven to have genotoxicity in assays. However, little genotoxicity information and no micronuclei induction data for 2,4,6-TCP is available from tests, especially for sex-specific differences. Following a preliminary test, a piscine peripheral erythrocyte micronucleus assay was conducted on medaka ( ) after a 28-day exposure to 2,4,6-TCP. In the present study, the mean micronuclei (MNC) frequencies of all of the groups increased in a dose-dependent manner, which indicated the potential genotoxicity of 2,4,6-TCP. Moreover, males were found to be more susceptible compared with females after a 28-day exposure to 2,4,6-TCP in all of the dosed groups above 10 μg·L . This is the first report on the potential of micronuclei induction and a sex-susceptible effect in the peripheral erythrocytes of mature fish after 2,4,6-TCP exposure.

Keywords： 2     4     6-trichlorophenol     genotoxicity     Japanese medaka     piscine micronucleus test in peripheral erythrocytes     gender difference    

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Title Author Date Type Operation

Distribution system state estimation: an overview of recent developments

Gang WANG, Georgios B. GIANNAKIS, Jie CHEN, Jian SUN

Journal Article

Multi-objective optimization in a finite time thermodynamic method for dish-Stirling by branch and bound

Mohammad Reza NAZEMZADEGAN, Alibakhsh KASAEIAN, Somayeh TOGHYANI, Mohammad Hossein AHMADI, R.

Journal Article

A performance analysis of multi-satellite joint geolocation

Ding WANG,Shuai WEI,Ying WU

Journal Article

Effects of environmental factors on the production and release of matrix-bound phosphine from lake sediments

GENG Jinju, WANG Qiang, WANG Xiaorong, NIU Xiaojun

Journal Article

Experimental evaluation of a 35 kVA downdraft gasifier

Ashok Jayawant Rao KECHE, Gaddale AMBA PRASAD RAO

Journal Article

Biomechanics of knee joint – A review

Bhaskar Kumar MADETI,Srinivasa Rao CHALAMALASETTI,S K Sundara siva rao BOLLA PRAGADA

Journal Article

Upper bound solution to seismic active earth pressure of submerged backfill subjected to partial drainage

Journal Article

Effect of undercut on the lower bound stability of vertical rock escarpment using finite element and

Shuvankar DAS; Debarghya CHAKRABORTY

Journal Article

Particle-bound polycyclic aromatic hydrocarbons in typical urban of Yunnan-Guizhou Plateau: Characterization

Journal Article

Correction to: Effect of undercut on the lower bound stability of vertical rock escarpment using finite

Journal Article

Fundamental buckling of circular plates with elastically restrained edges and resting on concentric rigid ring support

Lokavarapu Bhaskara Rao, Chellapilla Kameswara Rao

Journal Article

Bearing and uplift capacities of under-reamed piles in soft clay underlaid by stiff clay using lower-bound

Mantu MAJUMDER, Debarghya CHAKRABORTY

Journal Article

Frequencies of circular plate with concentric ring and elastic edge support

Lokavarapu Bhaskara RAO,Chellapilla Kameswara RAO

Journal Article

Sudden death due to arrhythmogenic right ventricular cardiomyopathy: Two case reports

CHEN Xinshan, ZHANG Yigu, RAO Guangxun, HUANG Guangzhao

Journal Article

Susceptibility of male and female Japanese medaka (

Nannan LIU, Mei MA, Yiping XU, Jinmiao ZHA, Kaifeng RAO, Zijian WANG

Journal Article