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Trend prediction technology of condition maintenance for large water injection units

Xiaoli XU, Sanpeng DENG

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 2,   Pages 171-175 doi: 10.1007/s11465-009-0091-0

Abstract: Large-sized water injection units are key equipment in oilfields.To ensure the normal operation of units and save maintenance costs, trend prediction technology is studiedto achieve condition-based maintenance for water injection units.trend prediction technology can reflect the operating condition trend change of the water injection units

Keywords: water injection units     condition-based maintenance     trend prediction    

Pragmatic multi-stage simulated annealing for optimal placement of synchrophasor measurement units in

Pathirikkat GOPAKUMAR,M. JAYA BHARATA REDDY,Dusmata Kumar MOHANTA

Frontiers in Energy 2015, Volume 9, Issue 2,   Pages 148-161 doi: 10.1007/s11708-015-0344-z

Abstract: Advanced real time monitoring is facilitated by incorporating synchrophasor measurement units such asphasor measurement units (PMUs) to the power grid monitoring system.locations in the smart power grid for installing PMUs in conjunction with existing conventional measurement units

Keywords: phasor measurement units (PMUs)     pragmatic PMU placement     simulated annealing (SA)     western region Indian    

Distribution and potential ecological risk of heavy metals in the typical eco-units of Haihe River Basin

Jingling LIU,Tao YANG,Qiuying CHEN,Feng LIU,Binbin WANG

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 1,   Pages 103-113 doi: 10.1007/s11783-014-0686-5

Abstract: distribution and characteristics of seven heavy metals in sediments located in the typical ecological units(eco-units) (e.g., rivers, lakes, and estuaries) of Haihe River Basin were analyzed.The results indicated that the concentration scales of As, Hg, Cr, Cd, Pb, Cu, and Zn in the eco-unitsThe risk order of the typical eco-units are as follows: Zhangweinan River (2278345.68)>Estuary (161914.74

Keywords: Haihe River Basin     ecological risk     eco-units     heavy metals    

Reliability prediction and its validation for nuclear power units in service

Jinyuan SHI,Yong WANG

Frontiers in Energy 2016, Volume 10, Issue 4,   Pages 479-488 doi: 10.1007/s11708-016-0425-7

Abstract: In this paper a novel method for reliability prediction and validation of nuclear power units in serviceUsing these factors, the equivalent availability factor of nuclear power units in the following 3 yearsFurthermore, the reliability prediction method is validated using the nuclear power units in North Americanis found that the relative errors of the predicted equivalent availability factors for nuclear power unitsthus providing effective reliability management and maintenance optimization methods for nuclear power units

Keywords: nuclear power units in service     reliability     reliability prediction     equivalent availability factors    

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: The increasing capacity of nuclear units in power grid poses threat to system stability and security.Load disturbance may cause overspeed of the units and trigger the overspeed protection controller (OPCBased on the analysis of frequency regulation, mathematic models for nuclear units in the grid are establishedThe critical action of the OPC is proposed as the constraint of safe operation for the units.This research can help to estimate the capacity limitation of nuclear units in the grid.

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

Optimal operation of energy at hydrothermal power plants by simultaneous minimization of pollution and costs using improved ABC algorithm

Homayoun EBRAHIMIAN,Bahman TAHERI,Nasser YOUSEFI

Frontiers in Energy 2015, Volume 9, Issue 4,   Pages 426-432 doi: 10.1007/s11708-015-0376-4

Abstract: The aim of this paper is simultaneous minimization of hydrothermal units to reach the best solution byIn this type of optimization problem, all practical constraints of units were taken into account as muchThese constraints include the maximum and minimum output power of units, the constraints caused by the

Keywords: practical constraints of units     pollution function     inlet steam valve     up-ramp rate of units     improved ABC    

Energy conservation in China’s coal-fired power industry by installing advanced units and organized phasing

Weiliang WANG, Junfu LYU, Zheng LI, Hai ZHANG, Guangxi YUE, Weidou NI

Frontiers in Energy 2019, Volume 13, Issue 4,   Pages 798-807 doi: 10.1007/s11708-019-0633-z

Abstract: Coal-fired power is the main power source and the biggest contributor to energy conservation in the past several decades in China. It is generally believed that advanced technology should be counted on for energy conservation. However, a review of the decline in the national average net coal consumption rate (NCCR) of China’s coal-fired power industry along with its development over the past few decades indicates that the up-gradation of the national unit capacity structure (including installing advanced production and phasing out backward production) plays a more important role. A quantitative study on the effect of the unit capacity structure up-gradation on the decline in the national average NCCR suggests that phasing out backward production is the leading factor for the decline in the NCCR in the past decade, followed by the new installation, whose sum contributes to approximately 80% of the decline in the national average NCCR. The new installation has an effective affecting period of about 8 years, during which it would gradually decline from a relatively high value. Since the effect of phasing out backward production may remain at a certain degree given a continual action of phasing out backward capacity, it is suggested that the organized action of phasing out backward production should be insisted on.

Keywords: coal-fired power     energy conservation     net coal consumption rate     new installation     phasing out backward production     unit capacity structure    

Research on the special lifting device for steel box girders of Sutong Bridge

Chen Ming,Wu Qihe,Luo Chengbin,Zhou Hanfa

Strategic Study of CAE 2009, Volume 11, Issue 3,   Pages 65-70

Abstract: The steel box girder of main-span includes five portions: back span large unit, large block of pylon,Each back span large unit was fabricated by welding several deck segments together in factory, and wasHence, a kind of lighter lifting device for the erection of back span large units was accepted for this

Keywords: Sutong Bridge     large units     lifting device     cantilever installation     lifting gantry     design and use    

Occurrence and migration of microplastics and plasticizers in different wastewater and sludge treatment units

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 11, doi: 10.1007/s11783-022-1577-9

Abstract:

● Reduce the quantifying MPs time by using Nile red staining.

Keywords: Microplastics     Municipal wastewater treatment plant     Phthalate esters     Thermal hydrolysis    

High risk factors for pulmonary fungous infection in intensive care units of neurosurgery

ZHU Wenyu, TAN Liping, CHEN Xiangfeng, HUANG Qiang, LAN Qing

Frontiers of Medicine 2007, Volume 1, Issue 3,   Pages 299-303 doi: 10.1007/s11684-007-0057-8

Abstract: By analyzing the high risk factors for pulmonary fungous infection in intensive care units of neurosurgery

Keywords: seventeen     incidence     glucocorticoid     broad-spectrum antibiotic     Candidiasis    

Inhibition character of crotonaldehyde manufacture wastewater on biological acidification

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1403-9

Abstract:

• The inhibition of the main organic pollutions in CMW was demonstrated.

Keywords: Crotonaldehyde manufacture wastewater     Biological acidification     Volatile fatty acids     Inhibition     Toxic units    

Cerebration and Practice of Expanded feedstock sources for Ethylene units

Cao Xianghong

Strategic Study of CAE 2001, Volume 3, Issue 5,   Pages 35-43

Abstract: by-product of the de-waxing of the vacuum second and third cuts, can be used as feedstock for ethylene unitstests of the feedstock, the evaluation in a simulated cracker and the application results on industrial units

Keywords: ethylene     feedstock     sources    

Features of seismic hazard in large dam projects and strong motion monitoring of large dams

Martin WIELAND,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 1,   Pages 56-64 doi: 10.1007/s11709-010-0005-6

Abstract: Earthquakes can affect large dam projects in many different ways.Finally, the need for strong motion instrumentation of large dams is discussed.It is proposed that major dams with large damage potential, dams located in areas of high seismicity,

Keywords: seismic hazard     arch dam     concrete face rockfill dam     strong motion instrumentation     reservoir-triggered seismicity     Wenchuan earthquake    

Joint effects of Penta-BDE and heavy metals on

Baohua TANG, Lingyan ZHU, Qixing ZHOU

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 1,   Pages 99-110 doi: 10.1007/s11783-010-0260-8

Abstract: classified as additive, greater than additive, or less than additive by comparing the measured “toxic units

Keywords: polybrominated diphenyl ethers (PBDEs)     heavy metal     mixture toxicity     toxic units (TUs)     antioxidant enzyme    

Optimizing iodine capture performance by metal–organic framework containing with bipyridine units

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 4,   Pages 395-403 doi: 10.1007/s11705-022-2218-3

Abstract: sub>3-OH)4(H2O)6]12+ clusters, abundant bipyridine units, and large cavities that allowed guest molecules diffusion and transmission.The bipyridine units boosted the adsorption performance, and Th-BPYDC showed good reusability

Keywords: metal–organic framework     iodine     adsorption     nuclear waste     environmental remediation    

Title Author Date Type Operation

Trend prediction technology of condition maintenance for large water injection units

Xiaoli XU, Sanpeng DENG

Journal Article

Pragmatic multi-stage simulated annealing for optimal placement of synchrophasor measurement units in

Pathirikkat GOPAKUMAR,M. JAYA BHARATA REDDY,Dusmata Kumar MOHANTA

Journal Article

Distribution and potential ecological risk of heavy metals in the typical eco-units of Haihe River Basin

Jingling LIU,Tao YANG,Qiuying CHEN,Feng LIU,Binbin WANG

Journal Article

Reliability prediction and its validation for nuclear power units in service

Jinyuan SHI,Yong WANG

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

Optimal operation of energy at hydrothermal power plants by simultaneous minimization of pollution and costs using improved ABC algorithm

Homayoun EBRAHIMIAN,Bahman TAHERI,Nasser YOUSEFI

Journal Article

Energy conservation in China’s coal-fired power industry by installing advanced units and organized phasing

Weiliang WANG, Junfu LYU, Zheng LI, Hai ZHANG, Guangxi YUE, Weidou NI

Journal Article

Research on the special lifting device for steel box girders of Sutong Bridge

Chen Ming,Wu Qihe,Luo Chengbin,Zhou Hanfa

Journal Article

Occurrence and migration of microplastics and plasticizers in different wastewater and sludge treatment units

Journal Article

High risk factors for pulmonary fungous infection in intensive care units of neurosurgery

ZHU Wenyu, TAN Liping, CHEN Xiangfeng, HUANG Qiang, LAN Qing

Journal Article

Inhibition character of crotonaldehyde manufacture wastewater on biological acidification

Journal Article

Cerebration and Practice of Expanded feedstock sources for Ethylene units

Cao Xianghong

Journal Article

Features of seismic hazard in large dam projects and strong motion monitoring of large dams

Martin WIELAND,

Journal Article

Joint effects of Penta-BDE and heavy metals on

Baohua TANG, Lingyan ZHU, Qixing ZHOU

Journal Article

Optimizing iodine capture performance by metal–organic framework containing with bipyridine units

Journal Article