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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: This paper presents a novel method called the max-min method for presenting an accurate approximate analytical

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

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Self-organizing method for collaboration in multi-robot system on basis of balance principle

DONG Yangbin, JIANG Jinping, HE Yan

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 3,   Pages 283-287 doi: 10.1007/s11465-008-0044-z

Abstract: this paper demonstrates the impact of progress relation between the two subtasks on the whole task’sprogress, and then puts forward a self-organizing principle called balance principle that keeps the individual

Keywords： algorithm     self-organizing principle     validity     Simulation     allocation    

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Situation and measures of China’s CO

Jiankun HE

Frontiers in Energy 2018, Volume 12, Issue 3,   Pages 353-361 doi: 10.1007/s11708-018-0564-0

Abstract: reduction for combating climate change with its domestic sustainable development strategy to promote energy, enhances energy use efficiency and the economic output benefit, and simultaneously develops new andrenewable energy and accelerates energy structural decarbonization, so that the annual decrease ratesystem with near-zero emissions and with new and renewable energy as the main body in the second halfimplements the concept of green low-carbon development and accelerates the low carbon transition of energy

Keywords： climate change     the Paris Agreement     energy revolution     NDC (national determined contribution) goals    

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Time reversal method for guided wave inspection in pipes

DENG Fei, WU Bin, HE Cunfu

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 3,   Pages 251-260 doi: 10.1007/s11465-008-0050-1

Abstract: The application of the time reversal method in pipe-like structures based on finite element method (FEMSimulation results show that the time reversal array method is beneficial to the improvement of the signal-to-noiseAs the intercepting window is widened, more energy is included in re-emitted signals, which leads toIn parallel, a circumferential locating method based on the time reversal method is described.Except for a pipe with one defect, the circumferential locating method has been verified on another pipe

Keywords： reversal process     beneficial     circumferential location     energy     number    

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Research on China’s wind energy development strategy

He Dexin

Strategic Study of CAE 2011, Volume 13, Issue 6,   Pages 95-100

Abstract: February 2008, Chinese Academy of Engineering started up the great consultative project of Research on the EnergyAccording to the arrangement of renewable sub-tasks, the work of wind energy working group is to furtherunderstand the wind resources on the basis of "China Renewable Energy Development Strategic Researchforward the strategic targets, the technical routes, development focus and policy measures for the wind energy

Keywords： renewable energy     wind energy     sustainable development     strategic research    

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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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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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Using balance of seasonal herbage supply and demand to inform sustainable grassland management on the

Xinquan ZHAO, Liang ZHAO, Qi LI, Huai CHEN, Huakun ZHOU, Shixiao XU, Quanmin DONG, Gaolin WU, Yixin HE

Frontiers of Agricultural Science and Engineering 2018, Volume 5, Issue 1,   Pages 1-8 doi: 10.15302/J-FASE-2018203

Abstract: To mitigate the impacts of grassland degradation on the Qinghai–Tibetan Plateau (QTP), in recent decades China has been implementing large-scale conservation programs and has invested about 42 billion CNY (7 billion USD). However, these programs are faced with major challenges involving trade-offs between ecological function, livestock production and income of pastoralists. Scientific assessments, as well as technical and policy issues, have not fully captured the complex ecological, social and economic dynamics of the challenges facing grassland management on the QTP. Pastoral livestock production on the QTP is characterized by imbalance in both quality and quantity between livestock seasonal nutrient requirements and herbage production, which forces pastoralists to keep larger numbers of livestock for longer periods, leading to overgrazing. To solve these problems, an integrated crop-livestock system is promoted to improve the efficiency of livestock production and conserve natural grassland as well for a sustainable system for the QTP.

Keywords： ecosystem function     grassland degradation     grassland management     integrated rangeland-cropland-livestock production system     Qinghai–Tibetan Plateau    

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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: The aim is not only to predict perioperative injuries but also to function as a method of treatment or

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 energyestablished, and the remaining unknown coefficients of the equations are obtained by the finite element methodguiding 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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China’s energy—challenges and strategies

NI Weidou

Frontiers in Energy 2007, Volume 1, Issue 1,   Pages 1-8 doi: 10.1007/s11708-007-0001-2

Abstract: In this century, China started facing five major challenges in the energy field: energy supply, shortageof liquid fuel, environmental pollution, green house gas (GHG) emission, and energy supply in ruralIn this paper, the Chinese energy development strategy and general technical scheme (including energyconservation, utilization of coal, alternative fuel and renewable energy) are discussed, and some keyscientific problems in the fundamental research of energy are put forward.

Keywords： scientific     development strategy     utilization     technical     environmental pollution    

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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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China’s hydropower energy system toward carbon neutrality

Frontiers of Engineering Management   Pages 677-682 doi: 10.1007/s42524-022-0196-2

Abstract: Thus, an advanced hydropower energy system serving multiple energies is required to respond to volatility, with expanding role from a “stable energy supplier” to a “flexible efficiency regulator”.from three aspects: 1) system expansion (e.g., the construction of large-scale hydropower/renewable energybases in China, the construction of transnational hydropower energy internet, and the functional transformation

Keywords： hydropower system     carbon neutrality     artificial intelligence    

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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 biomassThe statistical product and service solutions (SPSS) statistical method was used to analyze the data

Keywords： mass balance     heat balance     biomass pyrolysis     economic benefit    

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Title Author Date Type Operation

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

Self-organizing method for collaboration in multi-robot system on basis of balance principle

DONG Yangbin, JIANG Jinping, HE Yan

Journal Article

Situation and measures of China’s CO

Jiankun HE

Journal Article

Time reversal method for guided wave inspection in pipes

DENG Fei, WU Bin, HE Cunfu

Journal Article

Research on China’s wind energy development strategy

He Dexin

Journal Article

Leptin signaling and leptin resistance

Yingjiang Zhou, Liangyou Rui

Journal Article

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

Tiefeng WANG

Journal Article

Using balance of seasonal herbage supply and demand to inform sustainable grassland management on the

Xinquan ZHAO, Liang ZHAO, Qi LI, Huai CHEN, Huakun ZHOU, Shixiao XU, Quanmin DONG, Gaolin WU, Yixin HE

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

China’s energy—challenges and strategies

NI Weidou

Journal Article

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

China’s hydropower energy system toward carbon neutrality

Journal Article

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

Quanyuan WEI, Yongshui QU, Tianwei TAN

Journal Article