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Load frequency control in deregulated power system with wind integrated system using fuzzy controller

Yajvender Pal VERMA, Ashwani KUMAR

Frontiers in Energy 2013, Volume 7, Issue 2,   Pages 245-254 doi: 10.1007/s11708-012-0218-6

Abstract: This paper presents the analysis of load frequency control (LFC) of a deregulated two-area hydro-thermalusing fuzzy logic controller, with doubly fed induction generators (DFIGs) integrated into both the controlThe conventional two-area power system is modified to study the effects of the bilateral contracts ofDeregulation creates highly competitive and distributed control environment, and the LFC becomes evenThe DFIGs integrated provide inertial support to the system through modified inertial control scheme,

Keywords： frequency regulation     fuzzy controller     de-regulated power system     doubly fed induction generator (DFIG)     bilateral    

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Demand response based congestion management in a mix of pool and bilateral electricity market model

Ashwani KUMAR, Charan SEKHAR

Frontiers in Energy 2012, Volume 6, Issue 2,   Pages 164-178 doi: 10.1007/s11708-012-0187-9

Abstract: during the congestion hours and the demand response to nodal prices will be an effective tool for the controlIn this paper, demand response-based CM has been proposed for a mix of pool and bilateral electricityThe bilateral demand has been obtained with minimum deviations in their preferred schedule.

Keywords： bid function     congestion management (CM)     demand response     pool+bilateral electricity market     static var    

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Dynamic simulation of urban water metabolism under water environmental carrying capacity restrictions

Weihua ZENG,Bo WU,Ying CHAI

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 1,   Pages 114-128 doi: 10.1007/s11783-014-0669-6

Abstract: A revised concept for urban water metabolism (UWM) is presented in this study to address the inadequacies in current research on UWM and the problems associated with the traditional urban water metabolic process. Feedback loops can be analyzed to increase the water environmental carrying capacity (WECC) of the new urban water metabolism system (UWMS) over that of a traditional UWMS. An analysis of the feedback loops of an UWMS was used to construct a system dynamics (SD) model for the system under a WECC restriction. Water metabolic processes were simulated for different scenarios using the Tongzhou District in Beijing as an example. The results for the newly developed UWM case showed that a water environment of Tongzhou District could support a population of 1.1926 × 10 , an irrigation area of 375.521 km , a livestock of 0.7732 × 10 , and an industrial value added of ¥193.14 × 10 (i.e. about US$28.285× 10 ) in 2020. A sensitivity analysis showed that the WECC could be improved to some extent by constructing new sewage treatment facilities or by expanding the current sewage treatment facilities, using reclaimed water and improving the water circulation system.

Keywords： system (UWMS)     system dynamic simulation     water environmental carrying capacity (WECC)     feedback loops     bilateralcontrol    

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Numerical investigation on the dryout point of annular flow in the upward narrow annuli with bilateral

SU Guanghui, QIU Suizheng, DUAN Feng, XIAO Zejun, HUANG Yanping

Frontiers in Energy 2007, Volume 1, Issue 3,   Pages 264-272 doi: 10.1007/s11708-007-0037-3

Abstract: has been developed to predict the dryout point of upward annular flow in vertical narrow annuli with bilateral
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Prevention of laryngeal webs through endoscopic keel placement for bilateral vocal cord lesions

Jian Chen, Yilai Shu, Matthew R. Naunheim, Min Chen, Lei Cheng, Haitao Wu

Frontiers of Medicine 2018, Volume 12, Issue 3,   Pages 301-306 doi: 10.1007/s11684-017-0549-0

Abstract: In this study, we retrospectively reviewed 54 patients who underwent microsurgery for bilateral lesionsThe keel placement and control groups received endoscopic keel placement and mitomycin C, respectivelylaryngeal web formation rate significantly decreased in the keel placement group compared with that in the controlhandicap index-10 scores for patients without web formation decreased in both the keel placement and controlkeel placement could be an effective method for preventing anterior glottic webs after surgery for bilateral

Keywords： glottic stenosis     glottic web     laryngeal keel     silastic sheets     anterior commissure    

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Crack propagation with different radius local random damage based on peridynamic theory

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 5,   Pages 1238-1248 doi: 10.1007/s11709-021-0695-y

Abstract: This study implements the peridynamic theory by subjecting bilateral notch cracked specimens to the conditions

Keywords： peridynamics     stochastic damage     bilateral notch crack    

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Comparison of surgical indications for hysterectomy by age and approach in 4653 Chinese women

Jingjing Jiang,Ting Ding,Aiyue Luo,Yunping Lu,Ding Ma,Shixuan Wang

Frontiers of Medicine 2014, Volume 8, Issue 4,   Pages 464-470 doi: 10.1007/s11684-014-0338-y

Abstract: Approximately 35% women who had hysterectomies also had concomitant bilateral oophorectomy.Both the surgical indications and the rates of bilateral oophorectomy varied by age.

Keywords： hysterectomy     surgical indications     surgical approach     bilateral oophorectomy    

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Peridynamics versus XFEM: a comparative study for quasi-static crack problems

Jinhai ZHAO, Hesheng TANG, Songtao XUE

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 4,   Pages 548-557 doi: 10.1007/s11709-017-0434-6

Abstract: Peridynamics (PD) is a nonlocal continuum theory based on integro-differential equations without spatial derivatives. The fracture criterion is implicitly incorporated in the PD theory and fracture is a natural outcome of the simulation. However, capturing of complex mixed-mode crack patterns has been proven to be difficult with PD. On the other hand, the extended finite element method (XFEM) is one of the most popular methods for fracture which allows crack propagation with minimal remeshing. It requires a fracture criterion which is independent of the underlying discretization though a certain refinement is needed in order to obtain suitable results. This article presents a comparative study between XFEM and PD. Therefore, two examples are studied. The first example is crack propagation in a double notched specimen under uniaxial tension with different crack spacings in loading direction. The second example is the specimens with two center cracks. The results show that PD as well as XFEM are well suited to capture this type of behaviour.

Keywords： XFEM     peridynamic     bilateral crack     parallel double cracks     nonlocal theory    

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Accelerated haze removal for a single image by dark channel prior Research Articles

Bo-xuan YUE, Kang-ling LIU, Zi-yang WANG, Jun LIANG

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 8,   Pages 1109-1118 doi: 10.1631/FITEE.1700148

Abstract: Haze scatters light transmitted in the air and reduces the visibility of images. Dealing with haze is still a challenge for image processing applications nowadays. For the purpose of haze removal, we propose an accelerated dehazing method based on single pixels. Unlike other methods based on regions, our method estimates the transmission map and atmospheric light for each pixel independently, so that all parameters can be evaluated in one traverse, which is a key to acceleration. Then, the transmission map is bilaterally filtered to restore the relationship between pixels. After restoration via the linear hazy model, the restored images are tuned to improve the contrast, value, and saturation, in particular to offset the intensity errors in different channels caused by the corresponding wavelengths. The experimental results demonstrate that the proposed dehazing method outperforms the state-of-the-art dehazing methods in terms of processing speed. Comparisons with other dehazing methods and quantitative criteria (peak signal-to-noise ratio, detectable marginal rate, and information entropy difference) are introduced to verify its performance.

Keywords： Haze removal     Dark channel prior     Hazy image model     Bilateral filtering    

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WHEAT STRIPE RUST AND INTEGRATION OF SUSTAINABLE CONTROL STRATEGIES IN CHINA

Frontiers of Agricultural Science and Engineering 2022, Volume 9, Issue 1,   Pages 37-51 doi: 10.15302/J-FASE-2021405

Abstract: Growing resistant cultivars is the best strategy to control this disease but the pathogen can overcomeCurrent stripe rust control measures are based on many years of research including the underlying epidemiologystripe rust include negative regulatory gene editing, resistance gene overexpression and biological control

Keywords： sustainable disease control / integrated control Puccinia striiformis / Triticum aestivum    

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Emerging contaminant control: From science to action

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 6, doi: 10.1007/s11783-022-1559-y

Abstract: characteristics and environmental risk of ECs in typical regions of China, and establishment of EC controlContinuous progress in scientific research of ECs promoted China’s action on EC control.Although great efforts have been made, the EC control in China still faces tremendous challenges.such as engineering, policy management and public participation should be combinedly adopted for EC control

Keywords： Emerging contaminants     Priority pollutants     PPCPs     POPs     Control policy    

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An integrated approach for machine-learning-based system identification of dynamical systems under control: application towards the model predictive control of a highly nonlinear reactor system

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 2,   Pages 237-250 doi: 10.1007/s11705-021-2058-6

Abstract: Advanced model-based control strategies, e.g., model predictive control, can offer superior control ofnonlinear continuous-time multiple-input multiple-output system models for nonlinear model predictive controlThis procedure successfully identified system models that enabled effective control in both servo andThis demonstration of how such system models could be identified for nonlinear model predictive controlwhich, in the face of process uncertainties or modelling limitations, allow rapid and stable control

Keywords： nonlinear model predictive control     black-box modeling     continuous-time system identification     machinelearning     industrial applications of process control    

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A systematic review of current and emergent manipulator control approaches

Syed Ali AJWAD,Jamshed IQBAL,Muhammad Imran ULLAH,Adeel MEHMOOD

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 2,   Pages 198-210 doi: 10.1007/s11465-015-0335-0

Abstract: productivity and accuracy in today’s robotic applications have highlighted an urge to replace classical controlstrategies with their modern control counterparts.Highlighting the authors’ research achievements in the domain of manipulator design and control, this paper presents a systematic and comprehensive review of the state-of-the-art control techniquesthree kinds of strategies, i.e., intelligent proportional-integral-derivative (PID) scheme, robust control

Keywords： robot control     robust and nonlinear control     adaptive control     intelligent control     industrial manipulators    

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Model-based nonlinear control of hydraulic servo systems: Challenges, developments and perspectives

Jianyong YAO

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 2,   Pages 179-210 doi: 10.1007/s11465-018-0464-3

Abstract: >Hydraulic servo system plays a significant role in industries, and usually acts as a core point in controlAlthough linear theory-based control methods have been well established, advanced controller design methodsEssential nonlinearity is a unique feature and makes model-based nonlinear control more attractive, dueIn this paper, a discussion for challenges in model-based nonlinear control, latest developments andto handle various challenges, nonlinear solutions including parameter adaptation, nonlinear robust control

Keywords： hydraulic servo system     adaptive control     robust control     nonlinear friction     disturbance compensation     repetitivecontrol     noise alleviation     constraint control    

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Precision control system of two-DOF stage with linear ultrasonic motor

ZHANG Hanlei, SHI Yunlai, ZHAO Chunsheng

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 4,   Pages 421-425 doi: 10.1007/s11465-008-0063-9

Abstract: Using an appropriate control method, linear ultrasonic motors can be used in applications requiring highIn this paper, a closed loop PI control system is designed to achieve high position accuracy during thecontrol of a two-DOF stage driven by linear ultrasonic motors.The PI control algorithm is used to increase the stability and accuracy of position control.Experimental results denote that the control strategy proposed in this paper appears to have high efficiency

Keywords： settling     position accuracy     PI control     control algorithm     orthogonal    

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Title Author Date Type Operation

Load frequency control in deregulated power system with wind integrated system using fuzzy controller

Yajvender Pal VERMA, Ashwani KUMAR

Journal Article

Demand response based congestion management in a mix of pool and bilateral electricity market model

Ashwani KUMAR, Charan SEKHAR

Journal Article

Dynamic simulation of urban water metabolism under water environmental carrying capacity restrictions

Weihua ZENG,Bo WU,Ying CHAI

Journal Article

Numerical investigation on the dryout point of annular flow in the upward narrow annuli with bilateral

SU Guanghui, QIU Suizheng, DUAN Feng, XIAO Zejun, HUANG Yanping

Journal Article

Prevention of laryngeal webs through endoscopic keel placement for bilateral vocal cord lesions

Jian Chen, Yilai Shu, Matthew R. Naunheim, Min Chen, Lei Cheng, Haitao Wu

Journal Article

Crack propagation with different radius local random damage based on peridynamic theory

Journal Article

Comparison of surgical indications for hysterectomy by age and approach in 4653 Chinese women

Jingjing Jiang,Ting Ding,Aiyue Luo,Yunping Lu,Ding Ma,Shixuan Wang

Journal Article

Peridynamics versus XFEM: a comparative study for quasi-static crack problems

Jinhai ZHAO, Hesheng TANG, Songtao XUE

Journal Article

Accelerated haze removal for a single image by dark channel prior

Bo-xuan YUE, Kang-ling LIU, Zi-yang WANG, Jun LIANG

Journal Article

WHEAT STRIPE RUST AND INTEGRATION OF SUSTAINABLE CONTROL STRATEGIES IN CHINA

Journal Article

Emerging contaminant control: From science to action

Journal Article

An integrated approach for machine-learning-based system identification of dynamical systems under control: application towards the model predictive control of a highly nonlinear reactor system

Journal Article

A systematic review of current and emergent manipulator control approaches

Syed Ali AJWAD,Jamshed IQBAL,Muhammad Imran ULLAH,Adeel MEHMOOD

Journal Article

Model-based nonlinear control of hydraulic servo systems: Challenges, developments and perspectives

Jianyong YAO

Journal Article

Precision control system of two-DOF stage with linear ultrasonic motor

ZHANG Hanlei, SHI Yunlai, ZHAO Chunsheng

Journal Article