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Quantitative analysis of yield and soil water balance for summer maize on the piedmont of the North China

Jingjing WANG,Feng HUANG,Baoguo LI

Frontiers of Agricultural Science and Engineering 2015, Volume 2, Issue 4,   Pages 295-310 doi: 10.15302/J-FASE-2015074

Abstract: The North China Plain (NCP) is a major grain production area in China, but the current winter wheat-summer maize system has resulted in a large water deficit. This water-shortage necessitates the improvement of crop water productivity in the NCP. A crop water model, AquaCrop, was adopted to investigate yield and water productivity (WP) for rain-fed summer maize on the piedmont of the NCP. The data sets to calibrate and validate the model were obtained from a 3-year (2011–2013) field experiment conducted on the Yanshan piedmont of the NCP. The range of root mean square error (RMSE) between the simulated and measured biomass was 0.67–1.25 t·hm , and that of relative error (RE) was 9.4%–15.4%, the coefficient of determination ( ) ranged from 0.992 to 0.994. The RMSE between the simulated and measured soil water storage at depth of 0–100 cm ranged from 4.09 to 4.39 mm; and RE and in the range of 1.07%–1.20% and 0.880–0.997, respectively. The WP as measured by crop yield per unit evapotranspiration was 2.50–2.66 kg·m . The simulated impact of long-term climate (i.e., 1980–2010) and groundwater depth on crop yield and WP revealed that the higher yield and WP could be obtained in dry years in areas with capillary recharge from groundwater, and much lower values elsewhere. The simulation also suggested that supplementary irrigation in areas without capillary groundwater would not result in groundwater over-tapping since the precipitation can meet the water required by both maize and ecosystem, thus a beneficial outcome for both food and ecosystem security can be assured.

Keywords： AquaCrop     summer maize     soil water balance     water productivity    

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Flow and mass balance analysis of eco-bio infiltration system

Marla C. MANIQUIZ, Lee-Hyung KIM, Soyoung LEE, Jiyeon CHOI

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 5,   Pages 612-619 doi: 10.1007/s11783-012-0448-1

Abstract: A structured stormwater infiltration system was developed and constructed at a university campus and monitoring of storm events was performed during a one-year operation period. The flow and pollutant mass balances were analyzed and the overall efficiency of the system was assessed. While significant positive correlations were observed among rainfall, runoff and discharge volume ( = 0.93-0.99; <0.05), there was no significant correlations existed between rainfall, runoff, discharge volume and pollutant load. The system was more effective in reducing the runoff volume by more than 50% for small storm events but the difference between the runoff and discharge volume was significant even with rainfall greater than 10 mm. Results showed that the pollutant reduction rates were higher compared to the runoff volume reduction. Average pollutant reduction rates were in the range of 72% to 90% with coefficient of variation between 0.10 and 0.46. Comparable with runoff reduction, the system was more effective in reducing the pollutant load for small storm events, in the range of 80% to 100% for rainfall between 0 and 10 mm; while 65% to 80% for rainfall between 10 and 20 mm. Among the pollutant parameters, particulate matters was highly reduced by the system achieving only a maximum of 25% discharge load even after the entire runoff was completely discharged. The findings have proven the capability of the system as a tool in stormwater management achieving both flow reduction and water quality improvement.

Keywords： best management practice     flow balance     low impact development     mass balance     nonpoint source     stormwater    

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GRASSLAND AGRICULTURE IN CHINA—A REVIEW

Fujiang HOU, Qianmin JIA, Shanning LOU, Chuntao YANG, Jiao NING, Lan LI, Qingshan FAN

Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 1,   Pages 35-44 doi: 10.15302/J-FASE-2020378

Abstract: interactions in integrated systems have significant positive effects on crop production, livestock production, energy

Keywords： food security     ruminant agriculture     herbivove agriculture     crop-livestock interaction     energy balance analysis    

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Analysis of catchment evapotranspiration at different scales using bottom-up and top-down approaches

Xiangyu XU, Dawen YANG,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 1,   Pages 65-77 doi: 10.1007/s11709-010-0002-9

Abstract: Physically-based hydrological models are used to predict catchment water balance through detailed simulationHowever, annual catchment water balance can also be easily and simply predicted using lumped conceptualmodels and lumped conceptual models can help us understand the dominant factors on catchment water balancepaper, a distributed physically-based hydrological model (i.e., bottom-up approach) and a simple water-energyFrom the analysis at different time scales through comparison of the top-down and the bottom-up methods

Keywords： catchment evapotranspiration     distributed hydrological model     water-energy balance model     top-down and bottom-up    

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Leptin signaling and leptin resistance

Yingjiang Zhou, Liangyou Rui

Frontiers of Medicine 2013, Volume 7, Issue 2,   Pages 207-222 doi: 10.1007/s11684-013-0263-5

Abstract:

Leptin is secreted into the bloodstream by adipocytes and is required for the maintenance of energyLeptin controls energy balance and body weight mainly through leptin receptor b (LEPRb)-expressing neuronssecond-order neurons located within and outside the hypothalamus, forming a neural network that controls the energy

Keywords： leptin signaling     leptin receptor     energy balance     leptin resistance     obesity    

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Numerical analysis of strongly nonlinear oscillation systems using He’s max-min method

H. BABAZADEH, G. DOMAIRRY, A. BARARI, R. AZAMI, A. G. DAVODI

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 4,   Pages 435-441 doi: 10.1007/s11465-011-0243-x

Abstract:

Nonlinear functions are crucial points and terms in engineering problems. Actual and physical problems can be solved by solving and processing such functions. Thus, most scientists and engineers focus on solving these equations. This paper presents a novel method called the max-min method for presenting an accurate approximate analytical solution to strong nonlinear oscillators. It can solve many linear or nonlinear differential equations without the tangible restriction of sensitivity to the degree of the nonlinear term. It is also quite convenient due to the reduction in the size of calculations. The algorithm suggests a promising approach and is systematically illustrated step by step.

Keywords： min-max method     nonlinear oscillation     duffing equation     mathematical pendulum     He’s energy balance method    

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Simulation of bubble column reactors using CFD coupled with a population balance model

Tiefeng WANG

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 2,   Pages 162-172 doi: 10.1007/s11705-009-0267-5

Abstract: The population balance model (PBM) is an effective approach to predict the bubble size distribution,

Keywords： bubble column     computational fluid dynamics     bubble breakup and coalescence     population balance model     bubble    

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Gut microbial balance and liver transplantation: alteration, management, and prediction

Xinyao Tian, Zhe Yang, Fangzhou Luo, Shusen Zheng

Frontiers of Medicine 2018, Volume 12, Issue 2,   Pages 123-129 doi: 10.1007/s11684-017-0563-2

Abstract:

Liver transplantation is a conventional treatment for terminal stage liver diseases. However, several complications still hinder the survival rate. Intestinal barrier destruction is widely observed among patients receiving liver transplant and suffering from ischemia–reperfusion or rejection injuries because of the relationship between the intestine and the liver, both in anatomy and function. Importantly, the resulting alteration of gut microbiota aggravates graft dysfunctions during the process. This article reviews the research progress for gut microbial alterations and liver transplantation. Especially, this work also evaluates research on the management of gut microbial alteration and the prediction of possible injuries utilizing microbial alteration during liver transplantation. In addition, we propose possible directions for research on gut microbial alteration during liver transplantation and offer a hypothesis on the utilization of microbial alteration in liver transplantation. The aim is not only to predict perioperative injuries but also to function as a method of treatment or even inhibit the rejection of liver transplantation.

Keywords： gut microbial balance     liver transplantation     ischemia–reperfusion     acute rejection    

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Nonlinear sealing force of a seawater balance valve used in an 11000-meter manned submersible

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11465-022-0726-y

Abstract: Balance valve is a core component of the 11000-meter manned submersible “struggle,” and its sealing performanceThe increasing sealing force improves the sealing performance and increases the system’s energy consumptionis proposed to obtain the minimum sealing force, ensuring no leakage at the valve port and reducing energyFinally, the minimum sealing force equation is applied in a balance valve to be experimented using aguiding significance for evaluating the sealing performance of ultrahigh pressure balance valves.

Keywords： seawater balance valve     sealing performance     hybrid ANE model     FEM     minimum sealing force equation    

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ORGANIC CARBON STOCKS IN A SILTY TEXTURED SOIL FOLLOWING REINTEGRATION OF A 20 YEARS OLD × SITE INTO A CROP ROTATION

Frontiers of Agricultural Science and Engineering 2023, Volume 10, Issue 2,   Pages 183-197 doi: 10.15302/J-FASE-2023485

Abstract:

● 0.98 Mg·ha−1·yr−1 Corg accumulation under miscanthus over 26 years.

Keywords： biobased energy crops     C balance     humus accumulation    

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Mass and heat balance calculations and economic evaluation of an innovative biomass pyrolysis project

Quanyuan WEI, Yongshui QU, Tianwei TAN

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 3,   Pages 355-361 doi: 10.1007/s11705-010-0567-9

Abstract: Based on the data from a straw pyrolysis demonstration project, the mass and heat balance of the biomassA cost-benefit analysis was then used to study the viability of commercializing the project.The analysis included net present value, internal rate of return and investment payback period.

Keywords： mass balance     heat balance     biomass pyrolysis     economic benefit    

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Phase synchronization and energy balance between neurons Research Article

Ying XIE, Zhao YAO, Jun MA

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 9,   Pages 1407-1420 doi: 10.1631/FITEE.2100563

Abstract: for neurons, and the realization of synchronization is helpful in maintaining energy balance betweenbalance or complete synchronization.The second criterion is that the coupling intensity increases exponentially before reaching energy balanceThe potential biophysical mechanism is that energy balance is broken and then synapse connections areactivated to maintain an adaptive energy balance between the neurons.

Keywords： Hamilton energy     Coupling synchronization     Synapse enhancement     Neural circuit    

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Decomposition analysis applied to energy and emissions: A literature review

Frontiers of Engineering Management   Pages 625-639 doi: 10.1007/s42524-023-0270-4

Abstract: Decomposition analysis has been widely used to assess the determinants of energy and CO2 emissionsBoth the methodology and application of decomposition analysis have been largely improved in the pastTo this end, this study presents a literature survey for decomposition analysis applied to energy andtechniques is first conducted, followed by a synthesis of emerging trends and features for the decomposition analysisThe findings are expected to direct future research in decomposition analysis.

Keywords： index decomposition analysis     structural decomposition analysis     production decomposition analysis     energy    

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Deviation correction strategy for the earth pressure balance shield based on shield–soil interactions

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 2, doi: 10.1007/s11465-022-0676-4

Abstract: approach for the deviation correction trajectory and posture rectification load for an earth pressure balance

Keywords： additional position change     deviation correction trajectory     earth pressure balance shield     mechanical    

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Model of a Distributed Database Server With Redundant Structure and Its Load Balance

Tian Junfeng,Liu Yuling,Du Ruizhong

Strategic Study of CAE 2004, Volume 6, Issue 6,   Pages 35-42

Abstract: focused on its redundancy relations, model of load balancing based on mobile agent and performance analysis

Keywords： distributed database     redundancy     load balance     mobile agent     performance analysis    

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Title Author Date Type Operation

Quantitative analysis of yield and soil water balance for summer maize on the piedmont of the North China

Jingjing WANG,Feng HUANG,Baoguo LI

Journal Article

Flow and mass balance analysis of eco-bio infiltration system

Marla C. MANIQUIZ, Lee-Hyung KIM, Soyoung LEE, Jiyeon CHOI

Journal Article

GRASSLAND AGRICULTURE IN CHINA—A REVIEW

Fujiang HOU, Qianmin JIA, Shanning LOU, Chuntao YANG, Jiao NING, Lan LI, Qingshan FAN

Journal Article

Analysis of catchment evapotranspiration at different scales using bottom-up and top-down approaches

Xiangyu XU, Dawen YANG,

Journal Article

Leptin signaling and leptin resistance

Yingjiang Zhou, Liangyou Rui

Journal Article

Numerical analysis of strongly nonlinear oscillation systems using He’s max-min method

H. BABAZADEH, G. DOMAIRRY, A. BARARI, R. AZAMI, A. G. DAVODI

Journal Article

Simulation of bubble column reactors using CFD coupled with a population balance model

Tiefeng WANG

Journal Article

Gut microbial balance and liver transplantation: alteration, management, and prediction

Xinyao Tian, Zhe Yang, Fangzhou Luo, Shusen Zheng

Journal Article

Nonlinear sealing force of a seawater balance valve used in an 11000-meter manned submersible

Journal Article

ORGANIC CARBON STOCKS IN A SILTY TEXTURED SOIL FOLLOWING REINTEGRATION OF A 20 YEARS OLD × SITE INTO A CROP ROTATION

Journal Article

Mass and heat balance calculations and economic evaluation of an innovative biomass pyrolysis project

Quanyuan WEI, Yongshui QU, Tianwei TAN

Journal Article

Phase synchronization and energy balance between neurons

Ying XIE, Zhao YAO, Jun MA

Journal Article

Decomposition analysis applied to energy and emissions: A literature review

Journal Article

Deviation correction strategy for the earth pressure balance shield based on shield–soil interactions

Journal Article

Model of a Distributed Database Server With Redundant Structure and Its Load Balance

Tian Junfeng,Liu Yuling,Du Ruizhong

Journal Article