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Parameter identification of interconnected power system frequency after trip-out of high voltage transmission

Xuzhan ZHOU,Shanshan LIU,Mingkun WANG,Yiping DAI,Yaohua TANG

Frontiers in Energy 2014, Volume 8, Issue 3,   Pages 386-393 doi: 10.1007/s11708-014-0323-9

Abstract: Accurate modeling and parameters of high voltage (HV) grid are critical for stability research of system frequencyIn this paper, simulation modeling of the system frequency was conducted of an interconnected power system

Keywords： high voltage (HV) grid     frequency stability parameter identification     primary frequency regulation (PFR    

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A comprehensive review of wind power based power system frequency regulation

Frontiers in Energy 2023, Volume 17, Issue 5,   Pages 611-634 doi: 10.1007/s11708-023-0876-6

Abstract: Thus, the capability of WP participating in the system frequency regulation has become a research hotspotIn this paper, the impact of WP on power system frequency stability is initially presented.In addition, various existing control strategies of WP participating in frequency regulation are reviewedMoreover, the WP combing with energy storage system (ESS) for system frequency regulation is exploredregulation are summarized.

Keywords： frequency regulation strategies     wind turbine generators     grid-forming control     model predictive control    

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Meta-analysis of the diagnostic efficiency of frequency-doubling technology for primary glaucoma

LIU Ting, HE Xiangge

Frontiers of Medicine 2007, Volume 1, Issue 1,   Pages 109-114 doi: 10.1007/s11684-007-0021-7

Abstract: The overall diagnostic capabilities and utility of frequency-doubling technology (FDT) in patients withprimary glaucoma, which was diagnosed by standard automated perimetry (SAP) and/or optic disc appearanceThe included articles are of good quality and FDT can be a highly efficient diagnostic test for primary

Keywords： inclusion     sensitivity analysis     correction     specificity     appropriate    

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Capacity limitation of nuclear units in grid based on analysis of frequency regulation

Yiping DAI, Pan JIANG, Lin GAO, Weimin KAN, Xiaoqing XIAO, Ge JIN

Frontiers in Energy 2012, Volume 6, Issue 2,   Pages 148-154 doi: 10.1007/s11708-012-0174-1

Abstract: Based on the analysis of frequency regulation, mathematic models for nuclear units in the grid are establishedThe relationship between different styles of frequency regulation and the allowable capacity of the nuclear

Keywords： nuclear units capacity     overspeed     primary frequency control (PFC)     second frequency control (SFC)    

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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-thermalinertial support to the system through modified inertial control scheme, and arrests the initial fall in frequencyThe inertial control responds to frequency deviations, which takes out the kinetic energy of the windturbine for improving the frequency response of the system.To enhance the participation of the doubly fed induction generator (DFIG) in the frequency control, optimal

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

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Design and analysis of a new high frequency double-servo direct drive rotary valve

Muzhi ZHU,Shengdun ZHAO,Jingxiang LI

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 4,   Pages 344-350 doi: 10.1007/s11465-016-0406-x

Abstract: investigated direct drive valve for many years to solve problems, such as fluid force imbalance and switching frequencyThis paper studied the high frequency double-servo direct drive rotary valve (DDRV), and proposed a novelstructure and drive method satisfying high reversing frequency and adequate quantity of flow.addition, a computational fluid dynamics (CFD) method based on Fluent was conducted to verify the flux regulation

Keywords： direct drive rotary valve     computational fluid dynamics (CFD)     flow regulation    

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Corpus-based research on English word recognition rates in primary school and word selection strategy Article

Wen-yan XIAO,Ming-wen WANG,Zhen WENG,Li-lin ZHANG,Jia-li ZUO

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 3,   Pages 362-372 doi: 10.1631/FITEE.1601118

Abstract: In this paper, we develop an English webpage corpus (EWC) and create a word frequency list using webBy comparing EWC word lists with the British National Corpus (BNC), we find that the BNC word frequencyWe also explore primary school students’ English word recognition rates by comparing the word frequencyThe results show that the word recognition rates for primary school children are relatively low in bothresults, we finally propose some word-selection strategies for compiling English textbooks for Chinese primary

Keywords： Corpus     Primary English     Recognition rate     Word frequency     Coverage rate    

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Evaluation of power regeneration in primary suspension for a railway vehicle

Ruichen WANG, Zhiwei WANG

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 2,   Pages 265-278 doi: 10.1007/s11465-019-0571-9

Abstract: rail vehicles, this study presents the feasibility of using power regenerating dampers (PRDs) in the primaryPRDs are configured as hydraulic electromagnetic-based railway primary vertical dampers and evaluatedof the generator, and the electromagnetic configuration provides a controllable damping force to the primaryIn several case studies, generic railway vehicle primary suspension systems that are configured to includeResults indicate that PRDs can simultaneously replace conventional primary vertical dampers, regenerate

Keywords： railway vehicle     primary damper     power regeneration     ride comfort     running safety    

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Dynein axonemal heavy chain 10 deficiency causes primary ciliary dyskinesia in humans and mice

Frontiers of Medicine   Pages 957-971 doi: 10.1007/s11684-023-0988-8

Abstract: Primary ciliary dyskinesia (PCD) is a congenital, motile ciliopathy with pleiotropic symptoms.

Keywords： DNAH10     mice     motile cilia     mutation     primary ciliary dyskinesia    

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Moving policy and regulation forward for single-use plastic alternatives

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 3, doi: 10.1007/s11783-021-1423-5

Abstract: Single-use plastics are often used once or cannot be reused for extended periods. They are widely consumed with the rapid development of social economy. The waste generated by single-use plastics threatens ecosystem health by entering the environment and ultimately restricts sustainable human development. The innovation of sustainable and environmentally friendly single-use plastic alternative materials and the joint participation of governments, enterprises and the public are promising technologies and management approaches that can solve the problem of single-use plastics wastes. The development of single-use plastic alternative products can be promoted fundamentally only by improving relevant legislation and standards, providing differentiated industrial policies, encouraging scientific and technological innovation and expanding public participation.

Keywords： Single-use plastic alternatives     Policy     Regulation     Sustainable development    

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Phase transition regulation and caloric effect

Frontiers in Energy 2023, Volume 17, Issue 4,   Pages 463-477 doi: 10.1007/s11708-023-0860-1

Abstract: Solid state refrigeration based on caloric effect is regarded as a potential candidate for replacing vapor-compression refrigeration. Numerous methods have been proposed to optimize the refrigeration properties of caloric materials, of which single field tuning as a relatively simple way has been systemically studied. However, single field tuning with few tunable parameters usually obtains an excellent performance in one specific aspect at the cost of worsening the performance in other aspects, like attaining a large caloric effect with narrowing the transition temperature range and introducing hysteresis. Because of the shortcomings of the caloric effect driven by a single field, multifield tuning on multicaloric materials that have a coupling between different ferro-orders came into view. This review mainly focuses on recent studies that apply this method to improve the cooling performance of materials, consisting of enlarging caloric effects, reducing hysteresis losses, adjusting transition temperatures, and widening transition temperature spans, which indicate that further progress can be made in the application of this method. Furthermore, research on the sign of lattice and spin contributions to the magnetocaloric effect found new phonon evolution mechanisms, calling for more attention on multicaloric effects. Other progress including improving cyclability of FeRh alloys by introducing second phases and realizing a large reversible barocaloric effect by hybridizing carbon chains and inorganic groups is described in brief.

Keywords： phase transition regulation     caloric effect     solid state refrigeration    

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The function and regulation of OTU deubiquitinases

Jiansen Du, Lin Fu, Yingli Sui, Lingqiang Zhang

Frontiers of Medicine 2020, Volume 14, Issue 5,   Pages 542-563 doi: 10.1007/s11684-019-0734-4

Abstract: character, structure and function of OTUs, such as the substrate specificity and catalytic activity regulation

Keywords： ubiquitin     OTU deubiquitinases     structure     function     regulation    

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Approach for natural gas to be a primary energy source in China

Weihe HUANG, Jindian CHEN, Chuan FU, Yan HUANG

Frontiers of Engineering Management 2019, Volume 6, Issue 4,   Pages 467-476 doi: 10.1007/s42524-019-0068-6

Abstract: In the long-term adjustment of energy structure, natural gas has gradually become the primary energyFor natural gas to be the primary energy, the exploitation of gas resources must be expanded, resource

Keywords： natural gas     energy revolution     primary energy     utilization areas     approaching means    

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Effect of traditional Chinese medicine combined with Western therapy on primary hepatic carcinoma: a

Li Ma, Bin Wang, Yuanxiong Long, Hanmin Li

Frontiers of Medicine 2017, Volume 11, Issue 2,   Pages 191-202 doi: 10.1007/s11684-017-0512-0

Abstract:

Primary hepatic carcinoma (PHC) is a common malignant tumor in China.systematic review with meta-analysis aimed to assess the effect of TCM combined with Western therapy on primary

Keywords： traditional Chinese medicine     primary hepatic carcinoma     meta-analysis    

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Tuning the primary selective nanochannels of MOF thin-film nanocomposite nanofiltration membranes for

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 4, doi: 10.1007/s11783-021-1474-7

Abstract:

• PA layer properties tune the primary nanochannels in MIL-101(Cr) TFN

Keywords： Porous metal organic framework     Thin-film nanocomposite membrane     Primary selective nanochannels     Nanofiltration    

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Title Author Date Type Operation

Parameter identification of interconnected power system frequency after trip-out of high voltage transmission

Xuzhan ZHOU,Shanshan LIU,Mingkun WANG,Yiping DAI,Yaohua TANG

Journal Article

A comprehensive review of wind power based power system frequency regulation

Journal Article

Meta-analysis of the diagnostic efficiency of frequency-doubling technology for primary glaucoma

LIU Ting, HE Xiangge

Journal Article

Capacity limitation of nuclear units in grid based on analysis of frequency regulation

Yiping DAI, Pan JIANG, Lin GAO, Weimin KAN, Xiaoqing XIAO, Ge JIN

Journal Article

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

Yajvender Pal VERMA, Ashwani KUMAR

Journal Article

Design and analysis of a new high frequency double-servo direct drive rotary valve

Muzhi ZHU,Shengdun ZHAO,Jingxiang LI

Journal Article

Corpus-based research on English word recognition rates in primary school and word selection strategy

Wen-yan XIAO,Ming-wen WANG,Zhen WENG,Li-lin ZHANG,Jia-li ZUO

Journal Article

Evaluation of power regeneration in primary suspension for a railway vehicle

Ruichen WANG, Zhiwei WANG

Journal Article

Dynein axonemal heavy chain 10 deficiency causes primary ciliary dyskinesia in humans and mice

Journal Article

Moving policy and regulation forward for single-use plastic alternatives

Journal Article

Phase transition regulation and caloric effect

Journal Article

The function and regulation of OTU deubiquitinases

Jiansen Du, Lin Fu, Yingli Sui, Lingqiang Zhang

Journal Article

Approach for natural gas to be a primary energy source in China

Weihe HUANG, Jindian CHEN, Chuan FU, Yan HUANG

Journal Article

Effect of traditional Chinese medicine combined with Western therapy on primary hepatic carcinoma: a

Li Ma, Bin Wang, Yuanxiong Long, Hanmin Li

Journal Article

Tuning the primary selective nanochannels of MOF thin-film nanocomposite nanofiltration membranes for

Journal Article