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Gathers flows the separation formula irrigation pattern research and the practice

Zhang Jianghui,Zhou Heping,Xu Xiaobo,Yao Xinhua

Strategic Study of CAE 2008, Volume 10, Issue 9,   Pages 25-30

Abstract:

Gathers flows the separation formula irrigation is a new water-savingirrigation pattern, which is based on the characteristic and request that thinly plants the fruit-growingThis paper summarized the basic idea of gathers flows the separation formula irrigation pattern, elaboratedthe key technologies of gathers flows the irrigation system, and that is gathers flows the separationformula douche, analyzed the comprehensive technical effect of gathers flows the separation formula

Keywords： water-saving agriculture     gathers flows the separation irrigation pattern     innovation research     practice    

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Dynamic analysis of free-surface thin film flows driven by gravity over undulated substrate

Zhaomiao LIU, Xin LIU, Guobin WANG, Hong LIAO,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 2,   Pages 219-225 doi: 10.1007/s11465-010-0010-4

Abstract: This paper studies thin film flows with free surfaces driven by gravity through two types of undulatedfrom Navier-Stokes equations and continuity equation, the exact numerical results of free-surface film flowsshearing stress during the flowing process are visualized via post-proceeding, and the streamlines separation

Keywords： waviness     triangle height     film thickness     streamlines separation     vortex    

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Cylindrical particulate internal flows: A review

Lizhong HUANG, Xiang GAO, Jianzhong LIN

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 4,   Pages 385-393 doi: 10.1007/s11465-012-0354-z

Abstract:

The study of cylindrical particulate internal flows has wide industrial applicability hence receivedThis article reviews the cylindrical particulate internal flows over the past twenty years.The research is related to the cylindrical particulate flows in the straight channel, curved channel

Keywords： cylindrical particulate flow     internal flow    

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Supersonic flows over cavities

FANG Tianwen, DING Meng, ZHOU Jin

Frontiers in Energy 2008, Volume 2, Issue 4,   Pages 528-533 doi: 10.1007/s11708-008-0055-9

Abstract: The characteristics of supersonic cold flows over cavities were investigated experimentally and numerically

Keywords： supersonic     different     ratio    

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Water Saving Irrigation for Rice and Its Effect on Environment

Mao Zhi

Strategic Study of CAE 2002, Volume 4, Issue 7,   Pages 8-16

Abstract: In this paper, based on the results of experiment and the experience of spread of these new irrigationregimes, the following four main kinds of water saving irrigation regimes in China have been classified

Keywords： rice     water saving irrigation     irrigation regime     potential of water-saving     enviromental impact    

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IMPROVING NITROGEN SAFETY IN CHINA: NITROGEN FLOWS, POLLUTION AND CONTROL

Frontiers of Agricultural Science and Engineering 2022, Volume 9, Issue 3,   Pages 465-474 doi: 10.15302/J-FASE-2022454

Abstract:

● It is necessary to address the N flows and their impacts on environment

Keywords： barriers     future management     ammonia emissions     nitrogen input     water N pollution    

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Influence of sprinkler irrigation droplet diameter, application intensity and specific power on flower

Yisheng ZHANG, Delan ZHU

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 2,   Pages 165-171 doi: 10.15302/J-FASE-2017145

Abstract: parameters of droplet strike damage and avoid flower injury due to the unsuitable practices during sprinkler irrigation, an indoor experiment of irrigation droplet impact on cyclamen was conducted.The results showed that a damage area of <1% represents a safe irrigation level, 1%–3% slight damageEquations of application intensity, specific power with sprinkler irrigation time and flower injury ratioWhen the duration of sprinkler irrigation was 1, 5 and 10 min, the threshold of impinging damage of application

Keywords： application intensity     damage     floriculture     flowers     specific power     sprinkler irrigation    

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Effects of irrigation and nitrogen management on hybrid maize seed production in north-west China

Hui RAN,Shaozhong KANG,Fusheng LI,Ling TONG,Taisheng DU

Frontiers of Agricultural Science and Engineering 2016, Volume 3, Issue 1,   Pages 55-64 doi: 10.15302/J-FASE-2016091

Abstract: Scientific irrigation and nitrogen management is important for agricultural production in arid areas.( ) of maize for seed production with plastic film-mulching, field experiments including different irrigationThe results indicated that kernel number per plant ( ) was significantly affected by irrigation and NReducing irrigation quantity significantly increased stem partitioning index ( ) and leaf partitioningwas significantly reduced by reducing irrigation quantity, but not by reducing N rate.

Keywords： yield components     biomass partitioning     harvest index     irrigation     nitrogen     maize for seed production    

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Alternate partial root-zone irrigation with high irrigation frequency improves root growth and reduces

Shaoqing DU, Ling TONG, Shaozhong KANG, Fusheng LI, Taisheng DU, Sien LI, Risheng DING

Frontiers of Agricultural Science and Engineering 2018, Volume 5, Issue 2,   Pages 188-196 doi: 10.15302/J-FASE-2017176

Abstract: Alternate partial root-zone irrigation (APRI) can improve water use efficiency in arid areas.A two-year field experiment was conducted with two irrigation amounts (400 and 500 mm) and three irrigationmethods (conventional irrigation, APRI with high and low frequencies).The results show that in comparison with conventional irrigation, APRI with high frequency significantlyOverall, alternate partial root-zone irrigation with high frequency has a great potential to promote

Keywords： alternate partial root-zone irrigation     apple tree     leaf water use efficiency     root length density     stomatal    

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Porosity model for flows in CMP

ZHANG Chao-hui, YE Wei, LUO Jian-bin, WEN Shi-zhu

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 4,   Pages 418-423 doi: 10.1007/s11465-006-0050-y

Abstract: In an effort to explore the contribution of the pad, which is usually full of pores, to the performance of CMP (chemical mechanical polishing), a three-dimensional flow model of CMP is presented by assuming that the fluids in the porous layer comply with Darcy s law, which states that the flow velocity is proportional to the pressure gradient and inverse proportional to the viscosity. The flow equation is deduced accordingly and, by taking advantage of the multilevel technique and line relaxation technique, numerical simulations are carried out to reveal the relationships between the load capacities and operational parameters (including pivot height, roll angle and pitch angle), under conditions with different porous parameters and different thicknesses of the porous layer. The little porous parameter will lead to a prominent increase of load capability (for instance, the load and the moment predicted), which is still augmented by the thicker layer parameter. This will result in a higher material removal ratio of CMP. A pad full of large pores will be used to deduce load capability, facilitating the free flow of the fluids through the pores. The research will add some insights on the mechanism of the CMP technique.

Keywords： multilevel technique     three-dimensional     proportional     research     thicker    

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PLANT DENSITY, IRRIGATION AND NITROGEN MANAGEMENT: THREE MAJOR PRACTICES IN CLOSING YIELD GAPS FOR AGRICULTURAL

Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 4, doi: 10.15302/J-FASE -2020355

Abstract: conducted on a 3.9-ha maize seed production field in arid north-western China, managed with border and drip irrigationHowever, drip irrigation saved 227 mm irrigation water during a drier growing season compared with traditionalborder irrigation, accounting for 44% of the maize evapotranspiration (ET).Yield variability under drip irrigation was 12.1%, lower than the 18.8% under border irrigation.and fertilizer management, using water-saving irrigation methods and using site-specific management.

Keywords： boundary line analysis     irrigation method     precision agriculture     spatial variability     yield gaps    

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Investigation of vortical flows over oscillating body using fast Lagrangian vortex method

Baoshan ZHU ,

Frontiers in Energy 2009, Volume 3, Issue 3,   Pages 297-306 doi: 10.1007/s11708-009-0010-4

Abstract: A computational method facilitating long-time and high-resolution unsteady vortical flows is developedeffectiveness of the present method is examined by comparing the numerical results of unsteady separated flows

Keywords： unsteady vortical flows     fast vortex method     vortex shedding     rotational oscillation     thin cambered blade    

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Real-time Forecast of Irrigation

Mao Zhi,Li Yuanhua,Li Huichang

Strategic Study of CAE 2002, Volume 4, Issue 5,   Pages 24-33

Abstract:

The real-time forecast of irrigation is one of the essential part of the work for compiling a dynamicplan of irrigation water use.It plays an important role in saving water, increasing crop yields and economic benefits in an irrigationforecast of water requirements of crops is the essential and difficult part in the real-time foreast of irrigationforecast including the real-time forecast of the date and quota of irrigation for both dry food crops

Keywords： irrigation     real-time forecast     evapotranspiration     irrigation schedule    

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Influence of the sewage irrigation on the agricultural soil properties in Tongliao City, China

Hong YAO, Shichao ZHANG, Xiaobo XUE, Jie YANG, Kelin HU, Xiaohua YU

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 2,   Pages 273-280 doi: 10.1007/s11783-013-0497-0

Abstract: Increasing shortages of fresh water has led to greater use of treated wastewater for irrigation of cropsThis study evaluates the spatial variability of soil properties after irrigation with wastewater andWastewater irrigation resulted in higher TN, TP and OM concentrations by 18.4%, 8% and 25%, respectivelyanalysis of pH levels at different depths for the three sites showed that pH values for wastewater irrigation

Keywords： spatial variability     soil properties     groundwater and sewage irrigation    

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Restoring soil health to reduce irrigation demand and buffer the impacts of drought

Rebecca SCHNEIDER, Stephen MORREALE, Zhigang LI, Erin MENZIES PLUER, Kirsten KURTZ, Xilu NI, Cuiping WANG, Changxiao LI, Harold VAN ES

Frontiers of Agricultural Science and Engineering 2020, Volume 7, Issue 3,   Pages 339-346 doi: 10.15302/J-FASE-2020348

Abstract:

Irrigation consumes three quarters of global water withdrawals each year.Strategies are needed to reduce irrigation water use, including increasing the efficiency of transferrestoration of soil health, specifically through organic matter amendments, can substantially reduce irrigation

Keywords： drought     irrigation     restoration     soil health     woodchips    

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Title Author Date Type Operation

Gathers flows the separation formula irrigation pattern research and the practice

Zhang Jianghui,Zhou Heping,Xu Xiaobo,Yao Xinhua

Journal Article

Dynamic analysis of free-surface thin film flows driven by gravity over undulated substrate

Zhaomiao LIU, Xin LIU, Guobin WANG, Hong LIAO,

Journal Article

Cylindrical particulate internal flows: A review

Lizhong HUANG, Xiang GAO, Jianzhong LIN

Journal Article

Supersonic flows over cavities

FANG Tianwen, DING Meng, ZHOU Jin

Journal Article

Water Saving Irrigation for Rice and Its Effect on Environment

Mao Zhi

Journal Article

IMPROVING NITROGEN SAFETY IN CHINA: NITROGEN FLOWS, POLLUTION AND CONTROL

Journal Article

Influence of sprinkler irrigation droplet diameter, application intensity and specific power on flower

Yisheng ZHANG, Delan ZHU

Journal Article

Effects of irrigation and nitrogen management on hybrid maize seed production in north-west China

Hui RAN,Shaozhong KANG,Fusheng LI,Ling TONG,Taisheng DU

Journal Article

Alternate partial root-zone irrigation with high irrigation frequency improves root growth and reduces

Shaoqing DU, Ling TONG, Shaozhong KANG, Fusheng LI, Taisheng DU, Sien LI, Risheng DING

Journal Article

Porosity model for flows in CMP

ZHANG Chao-hui, YE Wei, LUO Jian-bin, WEN Shi-zhu

Journal Article

PLANT DENSITY, IRRIGATION AND NITROGEN MANAGEMENT: THREE MAJOR PRACTICES IN CLOSING YIELD GAPS FOR AGRICULTURAL

Journal Article

Investigation of vortical flows over oscillating body using fast Lagrangian vortex method

Baoshan ZHU ,

Journal Article

Real-time Forecast of Irrigation

Mao Zhi,Li Yuanhua,Li Huichang

Journal Article

Influence of the sewage irrigation on the agricultural soil properties in Tongliao City, China

Hong YAO, Shichao ZHANG, Xiaobo XUE, Jie YANG, Kelin HU, Xiaohua YU

Journal Article

Restoring soil health to reduce irrigation demand and buffer the impacts of drought

Rebecca SCHNEIDER, Stephen MORREALE, Zhigang LI, Erin MENZIES PLUER, Kirsten KURTZ, Xilu NI, Cuiping WANG, Changxiao LI, Harold VAN ES

Journal Article