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Realization of an Optimal Dynamic Geodetic Reference Frame in China: Methodology and Applications Article

Pengfei Cheng, Yingyan Cheng, Xiaoming Wang, Suqin Wu, Yantian Xu

Engineering 2020, Volume 6, Issue 8,   Pages 879-897 doi: 10.1016/j.eng.2020.08.004

Abstract: China Geodetic Coordinate System 2000 (CGCS2000) has been used for several years as a formal published referenceframe.navigation satellite system (GNSS) stations in China need to be corrected to align with the CGCS2000 frameDifferent strategies can be adopted for the realization of an optimal reference frame.study, a statistic method called “supervised clustering”is applied to the selection of GNSS reference

Keywords： Optimal reference frame realization     China Plate Model     CGCS2000 maintenance     Nonlinear movement modeling    

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The algorithm and realization of linear feature automatic label placement

Yin Yong,Li Chengming,Ding Shengtao

Strategic Study of CAE 2013, Volume 15, Issue 5,   Pages 30-36

Abstract: annotation of linear elements,proposed to calculate the positioning line of a linear element using referenceannotation line and to achieve dynamic segmentation of reference annotation line using reverse Douglas

Keywords： linear elements     automatic annotation configuration     reference line     reverse Douglas algorithm    

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Cholera: an overview with reference to the Yemen epidemic

Ali A. Rabaan

Frontiers of Medicine 2019, Volume 13, Issue 2,   Pages 213-228 doi: 10.1007/s11684-018-0631-2

Abstract: Cholera is a secretory diarrhoeal disease caused by infection with , primarily the O1 El Tor biotype. There are approximately 2.9 million cases in 69 endemic countries annually, resulting in 95 000 deaths. Cholera is associated with poor infrastructure and lack of access to sanitation and clean drinking water. The current cholera epidemic in Yemen, linked to spread of O1 (Ogawa serotype), is associated with the ongoing war. This has devastated infrastructure and health services. The World Health Organization had estimated that 172 286 suspected cases arose between 27th April and 19th June 2017, including 1170 deaths. While there are three oral cholera vaccines prequalified by the World Health Organization, there are issues surrounding vaccination campaigns in conflict situations, exacerbated by external factors such as a global vaccine shortage. Major movements of people complicates surveillance and administration of double doses of vaccines. Cholera therapy mainly depends on rehydration, with use of antibiotics in more severe infections. Concerns have arisen about the rise of antibiotic resistance in cholera, due to mobile genetic elements. In this review, we give an overview of cholera epidemiology, virulence, antibiotic resistance, therapy and vaccines, in the light of the ongoing epidemic in Yemen.

Keywords： cholera     epidemic     multi-drug resistant     catechin     luteolin     ToxT     CTX&Fcy    

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Solid-state transformer-based new traction drive system and control

Jianghua FENG, Jing SHANG, Zhixue ZHANG, Huadong LIU, Zihao HUANG

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 3,   Pages 411-426 doi: 10.1007/s11465-018-0467-0

Abstract: On this basis, an integrated control strategy built upon synchronous rotating reference frame is presented

Keywords： solid-state traction transformer     high-voltage cascaded rectifier     LLC resonant converter     synchronous rotating referenceframe     carrier-interleaving phase shift control     secondary pulsating voltage     beat frequency    

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reference tracking control design for a class of nonlinear systems with time-varying delays

Mei-qin LIU,Hai-yang CHEN,Sen-lin ZHANG

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 9,   Pages 759-768 doi: 10.1631/FITEE.1500053

Abstract: Second, the performance analysis of the closed-loop system including this unified model, referencedesign are derived in terms of LMIs such that the output of the closed-loop system tracks the given referenceThe reference model adopted here is modified to be more flexible.

Keywords： H∞     reference tracking     Nonlinear system     State feedback control     Time-varying delays     Unified model    

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Experimental study of modal parameter identification in a simulated ambient-excited structure

JI Xiaodong, QIAN Jiaru, XU Longhe

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 3,   Pages 281-285 doi: 10.1007/s11709-007-0036-9

Abstract: The natural excitation technique and the eigensystem realization algorithm were combined to identifyThe experimental modal analysis was performed on a two-story steel braced frame model excited by simulated

Keywords： eigensystem realization     eigen-sensitivity analysis     realization algorithm     vibration     effective    

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Design and realization of a remote monitoring and diagnosis and prediction system for large rotating

Shaohong WANG, Tao CHEN, Jianghong SUN

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 2,   Pages 165-170 doi: 10.1007/s11465-009-0090-1

Abstract: Traditional on-site fault diagnosis means cannot meet the needs of large rotating machinery for its performance and complexity. Remote monitoring and diagnosis technology is a new fault diagnosis mode combining computer technology, communication technology, and fault diagnosis technology. The designed remote monitoring and diagnosis and prediction system for large rotating machinery integrates the distributed resources in different places and breaks through shortcomings as the offline and decentralized information. The system can make further implementation of equipment prediction technology research based on condition monitoring and fault diagnosis, provide on-site analysis results, and carry out online actual verification of the results. The system monitors real-time condition of the equipment and achieves early fault prediction with great significance to guarantee safe operation, saves maintenance costs, and improves utilization and management of the equipment.

Keywords： large rotating machinery     remote monitoring     fault diagnosis     prediction system    

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A reliable and practical reference objective for the deviation diagnosis of energy system parameters

Liping LI, Zheng LI,

Frontiers in Energy 2009, Volume 3, Issue 4,   Pages 440-445 doi: 10.1007/s11708-009-0051-8

Abstract: The core objective to optimize a complex energy system is to set the reference target to guide the parameter

Keywords： energy system     case-based     optimization     power unit operation     performance    

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A multi-objective design method for seismic retrofitting of existing reinforced concrete frames using pin-supported rocking walls

Yue CHEN; Rong XU; Hao WU; Tao SHENG

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 9,   Pages 1089-1103 doi: 10.1007/s11709-022-0851-z

Abstract: Over the past several decades, a variety of technical ways have been developed in seismic retrofitting of existing reinforced concrete frames (RFs). Among them, pin-supported rocking walls (PWs) have received much attentions to researchers recently. However, it is still a challenge that how to determine the stiffness demand of PWs and assign the value of the drift concentration factor (DCF) for entire systems rationally and efficiently. In this paper, a design method has been exploited for seismic retrofitting of existing RFs using PWs (RF-PWs) via a multi-objective evolutionary algorithm. Then, the method has been investigated and verified through a practical project. Finally, a parametric analysis was executed to exhibit the strengths and working mechanism of the multi-objective design method. To sum up, the findings of this investigation show that the method furnished in this paper is feasible, functional and can provide adequate information for determining the stiffness demand and the value of the DCF for PWs. Furthermore, it can be applied for the preliminary design of these kinds of structures.

Keywords： pin-supported rocking wall     reinforced concrete frame     seismic retrofit     stiffness demand     drift concentrationfactor     multi-objective design     genetic algorithm     Pareto optimal solution    

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Self-generation of machining precision and its realization in lapping of super precision solid balls

ZHANG Bopeng

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 3,   Pages 348-353 doi: 10.1007/s11465-008-0065-7

Abstract: This paper presents the principle of self-generation of machining precision by explaining its basic concept and five necessary conditions for forming a system with self-organization capability. A self-generation system is a kind of system with self-organization capability. The self-generation of machining precision for solid balls with super precision is emphatically explained. From the viewpoint of self-organization, there are three types of systems including system 1 with the self-regulation capability, 2 with the self-determination capability of goals, and 3 with the self-organization capability. Although they are all closed loop control systems, they have different constructions and functions. Necessary conditions for achieving self-generation of machining precision are given. Establishment of the system for machining solid balls with super precision is discussed. Self-generation of machining precision for solid balls with super precision on the basis of the capability of self-removal of errors is presented. Self-generation includes the ability of self-removal of errors for solid balls, convergence of self-removal of errors, self-generation of precision, and self-generating system for the given.

Keywords： self-generation     necessary     self-regulation capability     viewpoint     Necessary    

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Seismic performance of moment resisting steel frame subjected to earthquake excitations

Fadzli M. NAZRI, Pang Yew KEN

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 1,   Pages 19-25 doi: 10.1007/s11709-014-0240-3

Abstract: The IDA results show that the far field ground motions has caused all steel frame design within the research

Keywords： incremental dynamic analysis (IDA)     pushover analysis     performance-based seismic design    

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Management strategies of marine food resources under multiple stressors with particular reference of

Qisheng TANG

Frontiers of Agricultural Science and Engineering 2014, Volume 1, Issue 1,   Pages 85-90 doi: 10.15302/J-FASE-2014021

Abstract:

In this study two main management strategies are discussed: one is to develop resource conservation-based capture fisheries, and the other is to develop environmentally friendly aquaculture. During the resource recovery period, the development of environmentally friendly aquaculture should be encouraged, especially in integrated multi-trophic aquaculture, which is adaptive, efficient and sustainable. For future development and better understanding the ecosystem, it is necessary to further strengthen basic research.

Keywords： marine     ecosystem     management strategies     food resources     Yellow Sea    

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Development of rocking constraint device with vertical damping capacity for three-dimensional base-isolated frame

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 3,   Pages 350-367 doi: 10.1007/s11709-022-0923-0

Abstract: A new rocking constraint device (RCD) is developed for three-dimensional (3D) base-isolated frame structures

Keywords： three-dimensional isolation     rocking behavior     rocking constraint device     replaceable damping component     sinusoidal test    

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Scientific Connotation and Development Strategy of Standard Reference Data

Fang Xiang, Yu Lianchao, Ren Siyuan, Xiong Xingchuang

Strategic Study of CAE 2023, Volume 25, Issue 3,   Pages 230-238 doi: 10.15302/J-SSCAE-2023.07.021

Abstract:

Standard reference data is a type of high-quality scientific data andResearch on the standard reference data in China lags significantly behind the advanced world levelexplores the scientific connotation, extended characteristics, and strategic values of standard referenceMoreover, the current status of standard reference data development in China is viewed, key problemsFurthermore, the study recommends establishing a sound policy system for standard reference data

Keywords： scientific data     metrological traceability     standardization     standard reference data    

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Wheat research and breeding in the new era of a high-quality reference genome

Rudi APPELS

Frontiers of Agricultural Science and Engineering 2019, Volume 6, Issue 3,   Pages 225-232 doi: 10.15302/J-FASE-2019265

Abstract:

The publications of the International Wheat Genome Sequencing Consortium (IWGSC) released in August 2018 are reviewed and placed into the context of developments arising from the availability of the high-quality wheat genome assembly.

Keywords： assembly technology     molecular markers     polyploidy     transcript networks     wheat genome    

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Title Author Date Type Operation

Realization of an Optimal Dynamic Geodetic Reference Frame in China: Methodology and Applications

Pengfei Cheng, Yingyan Cheng, Xiaoming Wang, Suqin Wu, Yantian Xu

Journal Article

The algorithm and realization of linear feature automatic label placement

Yin Yong,Li Chengming,Ding Shengtao

Journal Article

Cholera: an overview with reference to the Yemen epidemic

Ali A. Rabaan

Journal Article

Solid-state transformer-based new traction drive system and control

Jianghua FENG, Jing SHANG, Zhixue ZHANG, Huadong LIU, Zihao HUANG

Journal Article

reference tracking control design for a class of nonlinear systems with time-varying delays

Mei-qin LIU,Hai-yang CHEN,Sen-lin ZHANG

Journal Article

Experimental study of modal parameter identification in a simulated ambient-excited structure

JI Xiaodong, QIAN Jiaru, XU Longhe

Journal Article

Design and realization of a remote monitoring and diagnosis and prediction system for large rotating

Shaohong WANG, Tao CHEN, Jianghong SUN

Journal Article

A reliable and practical reference objective for the deviation diagnosis of energy system parameters

Liping LI, Zheng LI,

Journal Article

A multi-objective design method for seismic retrofitting of existing reinforced concrete frames using pin-supported rocking walls

Yue CHEN; Rong XU; Hao WU; Tao SHENG

Journal Article

Self-generation of machining precision and its realization in lapping of super precision solid balls

ZHANG Bopeng

Journal Article

Seismic performance of moment resisting steel frame subjected to earthquake excitations

Fadzli M. NAZRI, Pang Yew KEN

Journal Article

Management strategies of marine food resources under multiple stressors with particular reference of

Qisheng TANG

Journal Article

Development of rocking constraint device with vertical damping capacity for three-dimensional base-isolated frame

Journal Article

Scientific Connotation and Development Strategy of Standard Reference Data

Fang Xiang, Yu Lianchao, Ren Siyuan, Xiong Xingchuang

Journal Article

Wheat research and breeding in the new era of a high-quality reference genome

Rudi APPELS

Journal Article