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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:

Rice is one of the most important food crops contributing about 40% of the total food grain production in China. Out of about 110 million hectares of area sown food crops, 28% is covered by rice. Since 1980s, the shortage of water resources has become an important problem for agricultural production in rice planing areas and many water saving regimes for rice have been tested, advanced, applied and spread in different regions of China. In this paper, based on the results of experiment and the experience of spread of these new irrigation regimes, the following four main kinds of water saving irrigation regimes in China have been classified viz. (1) combining shallow water depth with “wetting” and “dry” (SWD), (2) alternate wetting and drying (AWD) ,(3) semi-dry cultivation (SDC) and (4) rainwater storage (RS). The standards of field water control and potential of saving water, increasing rice yield and water productivity of these regimes are introduced and explained. The selection and attention points of application for the four regimes are presented and the causes of sustainable saving water and increase in water productivity and the environmental impacts by adopting these regimes are analyzed and discussed.

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

Game theoretic analysis of environmental impact assessment system in China

CHENG Hongguang, PU Xiao, GONG Li, QI Ye

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 4,   Pages 448-453 doi: 10.1007/s11783-007-0071-8

Abstract: Environmental impact assessment (EIA) system has been established in China since 1973.

Keywords: public     impact assessment     Environmental impact     general    

The clinical impact of tricuspid regurgitation in patients with a biatrial orthotopic heart transplant

Frontiers of Medicine 2023, Volume 17, Issue 3,   Pages 527-533 doi: 10.1007/s11684-022-0967-5

Abstract: In this study, we aim to elucidate the clinical impact and long-term course of tricuspid regurgitation

Keywords: orthotopic heart transplant     tricuspid regurgitation     clinical impact     biatrial heart transplantation    

The Study on Urban Environmental Security and Emergency Help Programme for Serious Enviromental Disaster

Bian Yousheng

Strategic Study of CAE 2003, Volume 5, Issue 7,   Pages 1-10

Abstract:

The urban environmental security becomes a new hot spot of environmental problems at present. The environmental security is raised in correspondance with the environmental calamity. This article puts forwad urban environmental security and the preparatory scheme for heavy environmental disaster rescue for Beijing based on analysis of some insecurity environmental factors of Beijing. The research contents include: The Beijing urban environmental security; The environmental disaster comprehensive zoning in Beijing; The information system supporting the management and decision about environmental disaster;The rescue and prevention scheme of urban meterological disaster;The forest fire prevention of Beijing by GIS technology;The cause and prevention strategy of dust storm;The health security and epidemic prevention in Beijing;The study of earthquake disaster prevention; Transform, perfection and construction of urban lifeline system engineering; The rescue scheme for serious environmental disaster; The effect of environmental disaster on urban economic development in Beijing.

Keywords: environmental security     environmental disaster     emergency help programme    

Dynamical analysis of droplet impact spreading on solid substrate

Zhaomiao LIU, Huamin LIU, Xin LIU,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3,   Pages 308-315 doi: 10.1007/s11465-010-0020-2

Abstract: This paper investigates the impact spreading of a droplet on a solid substrate using numerical simulationhowever, the pressures on the substrate are quite different and air entrainment may be found as the impactThe impact speed impacts on the spreading factors in high speed droplet spreading.The spreading factor obviously increases with increasing impact speed; however, splashing will appear

Keywords: droplet     impact spreading     numerical simulation    

Comparison of droplet distributions from fluidic and impact sprinklers

Xingye ZHU,Shouqi YUAN,Junping LIU,Xingfa LIU

Frontiers of Agricultural Science and Engineering 2015, Volume 2, Issue 1,   Pages 53-59 doi: 10.15302/J-FASE-2015049

Abstract: prototype sprinklers, outside signal sprinkler (OS) and fluidic sprinkler (FS), were compared with impact

Keywords: outside signal sprinkler     fluidic sprinkler     impact sprinkler     sprinkler irrigation     droplet size     droplet    

Mechanical properties and impact resistance of concrete composites with hybrid steel fibers

Fatih ÖZALP; Halit Dilşad YILMAZ; Burcu AKCAY

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 5,   Pages 615-623 doi: 10.1007/s11709-022-0828-y

Abstract: In addition to the fracture energy and impact strength, two important indicators of ballistic performance

Keywords: projectile impact     depth of penetration     fracture energy     crater diameter     UHPFRC    

Hazard potential of zones of weakness in gravity dams under impact loading conditions

Herbert LINSBAUER

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 1,   Pages 90-97 doi: 10.1007/s11709-010-0008-3

Abstract: to “dynamic loading” in the form of seismic action on the dam-reservoir-system and alternatively by “impact

Keywords: dam-reservoir     earthquake     impact     cracking     fracture mechanics    

Buffer capacity of granular matter to impact of spherical projectile based on discrete element method

Ying YAN, Pengfei LI, Shunying JI

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 1,   Pages 50-54 doi: 10.1007/s11709-013-0186-x

Abstract: Granular matter possesses impact-absorbing property due to its energy dissipation character.To investigate the impact-absorbing capacity of granular matter, the discrete element method (DEM) isadopted to simulate the impact of a spherical projectile on to a granular bed.The penetration depth of the projectile and the first impact peak are investigated with different bedthicknesses and impact velocities.

Keywords: granular matter     impact peak     buffer capacity     discrete element method     critical thickness    

Water film coated composite liquid metal marble and its fluidic impact dynamics phenomenon

Yujie DING,Jing LIU

Frontiers in Energy 2016, Volume 10, Issue 1,   Pages 29-36 doi: 10.1007/s11708-015-0388-0

Abstract: A composite liquid metal marble made of metal droplet coated with water film was proposed and its impact

Keywords: liquid metal marble     metallic droplet     composite fluid     impact dynamics     multiphase fluid mechanics    

Dynamic characteristics of a shrouded blade with impact and friction

Xumin GUO, Jin ZENG, Hui MA, Chenguang ZHAO, Lin QU, Bangchun WEN

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 2,   Pages 209-226 doi: 10.1007/s11465-019-0566-6

Abstract: A simplified computational model of a twisted shrouded blade with impact and friction is established.Impact force is simulated using a linear spring model, and friction force is generated by a tangentialResults show that resonant peaks become inconspicuous and impact plays a dominant role when initial gaps

Keywords: twisted shrouded blade     dynamic analysis     impact     friction     separate–stick–slip motion    

RESEARCH PROGRESS ON THE IMPACT OF NITROGEN DEPOSITION ON GLOBAL GRASSLANDS

Frontiers of Agricultural Science and Engineering 2022, Volume 9, Issue 3,   Pages 425-444 doi: 10.15302/J-FASE-2022457

Abstract:

● Grasslands in many regions of the world have been impacted by atmospheric nitrogen deposition.

Keywords: Acidification     biomass production     critical load     eutrophication     species composition     species richness    

Corporate governance impact on banking risk

Mahdi JEMMALI, Bassem SALHI

Frontiers of Engineering Management 2020, Volume 7, Issue 2,   Pages 182-195 doi: 10.1007/s42524-019-0034-3

Abstract: a single equation that examines variables relative to governance and credit risk to determine their impact

Keywords: bank governance     banking risk     process decision     modeling     architecture    

Parameter studies on impact in a lap joint

Amir M. RAHMANI,Elizabeth K. ERVIN

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 1,   Pages 64-77 doi: 10.1007/s11465-014-0322-x

Abstract:

To represent a loose lap joint, a beam impacting four springs with gaps is modeled. Modal analysis with base excitation is solved, and time histories of contact points are closely monitored. Using the impulse during steady state response, six influential parameters are studied: damping ratio, contact stiffness, intermediate contact position, gap, excitation amplitude and beam height. For all parameters, the system response is highly controlled by modes with two contacting springs. Each parameter’s effect on system response is presented including unstable regions, unique trend behaviours result. Recommendations for structural designers are also noted.

Keywords: impact mechanics     contact     joint behaviour     modal analysis     parameter study    

Fatigue and impact analysis and multi-objective optimization design of Mg/Al assembled wheel considering

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 3, doi: 10.1007/s11465-022-0701-7

Abstract: this problem, this paper proposed the explicit riveting-implicit springback-implicit fatigue/explicit impactsequence coupling simulation analysis method, analyzed the fatigue and impact performance of the punchingprocess parameters of the assembled wheel joints were defined as design variables, and the fatigue and impactThe fatigue and impact performance of the Mg/Al assembled wheel were effectively improved after optimization

Keywords: magnesium/aluminum assembled wheel     riveting residual stress     fatigue analysis     impact analysis     multi-objective    

Title Author Date Type Operation

Water Saving Irrigation for Rice and Its Effect on Environment

Mao Zhi

Journal Article

Game theoretic analysis of environmental impact assessment system in China

CHENG Hongguang, PU Xiao, GONG Li, QI Ye

Journal Article

The clinical impact of tricuspid regurgitation in patients with a biatrial orthotopic heart transplant

Journal Article

The Study on Urban Environmental Security and Emergency Help Programme for Serious Enviromental Disaster

Bian Yousheng

Journal Article

Dynamical analysis of droplet impact spreading on solid substrate

Zhaomiao LIU, Huamin LIU, Xin LIU,

Journal Article

Comparison of droplet distributions from fluidic and impact sprinklers

Xingye ZHU,Shouqi YUAN,Junping LIU,Xingfa LIU

Journal Article

Mechanical properties and impact resistance of concrete composites with hybrid steel fibers

Fatih ÖZALP; Halit Dilşad YILMAZ; Burcu AKCAY

Journal Article

Hazard potential of zones of weakness in gravity dams under impact loading conditions

Herbert LINSBAUER

Journal Article

Buffer capacity of granular matter to impact of spherical projectile based on discrete element method

Ying YAN, Pengfei LI, Shunying JI

Journal Article

Water film coated composite liquid metal marble and its fluidic impact dynamics phenomenon

Yujie DING,Jing LIU

Journal Article

Dynamic characteristics of a shrouded blade with impact and friction

Xumin GUO, Jin ZENG, Hui MA, Chenguang ZHAO, Lin QU, Bangchun WEN

Journal Article

RESEARCH PROGRESS ON THE IMPACT OF NITROGEN DEPOSITION ON GLOBAL GRASSLANDS

Journal Article

Corporate governance impact on banking risk

Mahdi JEMMALI, Bassem SALHI

Journal Article

Parameter studies on impact in a lap joint

Amir M. RAHMANI,Elizabeth K. ERVIN

Journal Article

Fatigue and impact analysis and multi-objective optimization design of Mg/Al assembled wheel considering

Journal Article