Search | Engineering

Subscribe Submit

Home Journals Focus Achievement Fronts About Us 中文版

Resource Type

Journal Article 249

Year

2024 1

2023 20

2022 25

2021 15

2020 19

2019 19

2018 10

2017 18

2016 10

2015 10

2014 10

2013 7

2012 13

2011 3

2010 10

2009 6

2008 10

2007 14

2006 5

2005 4

open ︾

Keywords

energy efficiency 18

efficiency 16

removal efficiency 9

Removal efficiency 5

eco-efficiency 3

food security 3

utilization 3

water use efficiency 3

Circularly polarized 2

Energy efficiency 2

Particle Swarm Optimization (PSO) 2

data envelopment analysis 2

disruptive technologies 2

efficiency coefficient of coordination 2

harvest index 2

internal combustion engine 2

multiple optimization coordination model 2

nitrogen use efficiency 2

numeric example 2

open ︾

Search scope:

排序： Display mode:

Can energy storage make off-grid photovoltaic hydrogen production system more economical?

Frontiers of Engineering Management Pages 672-694 doi: 10.1007/s42524-022-0245-x

Abstract: Under the ambitious goal of carbon neutralization, photovoltaic (PV)-driven electrolytic hydrogen (PVEH) production is emerging as a promising approach to reduce carbon emission. Considering the intermittence and variability of PV power generation, the deployment of battery energy storage can smoothen the power output. However, the investment cost of battery energy storage is pertinent to non-negligible expenses. Thus, the installation of energy-storage equipment in a PVEH system is a complex trade-off problem. The primary goals of this study are to compare the engineering economics of PVEH systems with and without energy storage, and to explore time nodes when the cost of the former scenario can compete with the latter by factoring the technology learning curve. The levelized cost of hydrogen (LCOH) is a widely used economic indicator. Represented by seven areas in seven regions of China, results show that the LCOH with and without energy storage is approximately 22.23 and 20.59 yuan/kg in 2020, respectively. In addition, as technology costs drop, the LCOH of a PVEH system with energy storage will be less than that without energy storage in 2030.

Keywords： hydrogen off-grid photovoltaic energy storage LCOH engineering economics

HTML PDF Collect

Aerodynamic challenges in span length of suspension bridges

XIANG Haifan, GE Yaojun

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 2, Pages 153-162 doi: 10.1007/s11709-007-0016-0

Abstract: of extreme bridge spans is firstly discussed according to horizontal clearances for navigation and economical

Keywords： requirement reasonable limitation challenge particular economical construction

HTML PDF Collect

Fused structures for safer and more economical constructions

Yu-Fei WU, Ying-Wu ZHOU, Biao HU, Xiaoxu HUANG, Scott SMITH

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 1, Pages 1-9 doi: 10.1007/s11709-019-0541-7

Abstract: safer failure mode is enforced, a fused structure requires a smaller safety factor thus leading to more economical

Keywords： fused structures structural fuse fiber-reinforced polymer concrete

HTML PDF Collect

Selectively structural fractionation and economical-functionality conversion of lignocellulosic biomass

Chen Hongzhang,Qiu Weihua and Wang Lan

Strategic Study of CAE 2014, Volume 16, Issue 3, Pages 27-36

Abstract:

In this paper，an innovative biomass- refining path called“selective- fractionation and economical-functionalityestablished to prove the feasibility，reasonability and reliability of“selectivefractionation and economicalIn conclusion，“selective- fractionation and economical-functionality”of lignocellulosic materials

Keywords： biorefining heterogeneity of raw material selective-fractionation and economical-functionality industrialized

HTML PDF Collect

Technological and Economical Logic for Intelligent Manufacturing

Guo Zhaohui

Strategic Study of CAE 2018, Volume 20, Issue 4, Pages 97-100 doi: 10.15302/J-SSCAE-2018.04.016

Abstract: through research and comparison, that the fundamental cause of these difficulties is the poor economic efficiencyTherefore, the key to promote the application of certain technology is to improve the economic efficiencymanagement levels and low requirements for quality are the general causes restraining the economic efficiencyTo promote the economic efficiency of technology, strategic goals have to be set for technological transformationthe management level and to address the weaknesses of the enterprises, thus to improve the economic efficiency

Keywords： smart manufacture industrial Internet Industrial 4.0 Cyberspace

HTML PDF Collect

The effect of different agricultural management practices on irrigation efficiency, water use efficiency

La ZHUO, Arjen Y. HOEKSTRA

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 2, Pages 185-194 doi: 10.15302/J-FASE-2017149

Abstract: This paper explores the effect of varying agricultural management practices on different water efficiencyindicators: irrigation efficiency (IE), crop water use efficiency (WUE), and green and blue water footprintImprovements in one water efficiency indicator may cause a decline in another.

Keywords： field management irrigation efficiency water footprint water productivity water use efficiency

HTML PDF Collect

To Hold the Economical Time of Biology，to Practicea Positive View of Happiness

Gan Ziheng

Strategic Study of CAE 2007, Volume 9, Issue 2, Pages 5-11

Abstract:

As predicted,the global economy is stepping into a so called "biological economy" by 2020, which can be explained as economy mainly dominated by biological technologies. The essay discusses the proposition, definition, classification and characteristic of biological economy, also, the importance of positive view of happiness in a biological economy condition and the reason for emphasizing people's happiness achieving,and the definition of happiness philosophy. It also discusses which views of happiness should be recommended and how to practice a positive view of happiness in the scientific and technological circle in China.

Keywords： biological economy happiness positive view of happiness

HTML PDF Collect

Evaluating R&D efficiency of China’s listed lithium battery enterprises

Frontiers of Engineering Management Pages 473-485 doi: 10.1007/s42524-022-0213-5

Abstract: To guide future policies and understand proper ways of promoting R&D efficiency, we looked into the lithiumResults revealed little indication of a meaningful improvement in R&D efficiency throughout our samplewas 0.442, whereas the average pure technical efficiency was at 0.503, thus suggesting that they wereIn contrast, the performance of the five leading players seemed superior because their average efficiencyMoreover, they were experiencing increasing scale efficiency (IRS).

Keywords： Data Envelopment Analysis R&D investment efficiency China’s listed lithium battery enterprises technicalefficiency pure technical efficiency scale efficiency

HTML PDF Collect

Improving the efficiency and effectiveness of global phosphorus use: focus on root and rhizosphere levels

Uwe LUDEWIG, Lixing YUAN, Günter NEUMANN

Frontiers of Agricultural Science and Engineering 2019, Volume 6, Issue 4, Pages 357-365 doi: 10.15302/J-FASE-2019275

Abstract: Unfortunately, plant physiologists, agronomists, farmers and end users employ different measures for P use efficiency

Keywords： acquisition efficiency plant growth promoting rhizobacteria phosphate use efficiency utilization efficiency

HTML PDF Collect

Optimization of power and efficiency for an irreversible Diesel heat engine

Shiyan ZHENG, Guoxing LIN

Frontiers in Energy 2010, Volume 4, Issue 4, Pages 560-565 doi: 10.1007/s11708-010-0018-9

Abstract: thermodynamic analysis and optimal control theory methods, the analytical expressions of power output and efficiencyMoreover, the optimum criterion of some important parameters, such as the power output, efficiency, pressure

Keywords： Diesel heat engine irreversibility power output efficiency parameter optimization

HTML PDF Collect

Methods and applications of DEA cross-efficiency: Review and future perspectives

Jie WU, Jiasen SUN, Liang LIANG

Frontiers of Engineering Management 2021, Volume 8, Issue 2, Pages 199-211 doi: 10.1007/s42524-020-0133-1

Abstract: To address this problem, scholars have proposed the cross-efficiency evaluation (CREE) method.the theory and applications of CREE, including the non-uniqueness problem, the aggregation of cross-efficiency

Keywords： cross-efficiency evaluation efficiency secondary goal model aggregation review

HTML PDF Collect

STRATEGIES FOR IMPROVING WATER USE EFFICIENCY IN DRYLAND AGROECOSYSTEMS

Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 4, Pages 599-602 doi: 10.15302/J-FASE -2021409

HTML PDF Collect

Effects of dwarfing genes on water use efficiency of bread wheat

Jiakun YAN, Suiqi ZHANG

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 2, Pages 126-134 doi: 10.15302/J-FASE-2017134

Abstract: effects of different dwarfing genes on root growth, coleoptile length, grain yields and water using efficiency

Keywords： coleoptile length wheat dwarfing genes grain yield root water use efficiency

HTML PDF Collect

neutrality potential of wastewater treatment plants: A novel evaluation framework integrating energy efficiency

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 9, doi: 10.1007/s11783-022-1549-0

Abstract:

• Framework of indicators was established based on energy efficiency

Keywords： Wastewater treatment plants Energy neutrality potential Energy efficiency Energy recovery Evaluation

HTML PDF Collect

Approaches to achieve high grain yield and high resource use efficiency in rice

Jianchang YANG

Frontiers of Agricultural Science and Engineering 2015, Volume 2, Issue 2, Pages 115-123 doi: 10.15302/J-FASE-2015055

Abstract: This article discusses approaches to simultaneously increase grain yield and resource use efficiencyare three important approaches to achieving the dual goal of high grain yield and high resource use efficiencyDeeper root distribution and higher leaf photosynthetic N use efficiency at lower N rates could be usedsink activity through increasing sugar-spikelet ratio at the heading time and enhancing the conversion efficiencyand non-flooded straw mulching cultivation, could substantially increase grain yield and water use efficiency

Keywords： rice nitrogen-efficient cultivar grain fill harvest index nitrogen use efficiency water use efficiency