Resource Type

Journal Article 116

Year

2023 7

2022 5

2021 9

2020 13

2019 6

2018 9

2017 7

2016 5

2015 6

2014 2

2013 1

2012 3

2011 7

2010 10

2008 3

2007 4

2005 3

2002 6

2001 4

2000 2

open ︾

Keywords

development trend 23

food security 3

clean coal technology 2

current situation 2

developing trend 2

key technology 2

natural gas 2

performance 2

trend analysis 2

2035 1

6G 1

A-TIG welding 1

AOD 1

Aerosol concentration 1

Aerosol particle size 1

Aerosol pollution levels 1

Aerosol type 1

Agriculture Green Development 1

Air pollution control 1

open ︾

Search scope:

排序： Display mode:

Numerical study on laminar flame speed of natural gas-carbon monoxide-air mixtures

Chen DONG, Qulan ZHOU, Qinxin ZHAO, Tongmo XU, Shi’en HUI

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 4,   Pages 411-416 doi: 10.1007/s11705-010-0514-9

Abstract: The calculated laminar flame speeds of natural gas-carbon monoxide-air mixtures show a nonmonotonic increasingtrend with volumetric fraction of carbon monoxide and an increasing trend with the increase of initial

Keywords： laminar flame speed     numerical study     nonmonotonic increasing trend    

HTML PDF Collect

Study on reformulation of fluid catalytic cracking gasoline and increasing production of light olefins

YAN Pingxiang, MENG Xianghai, GAO Jinsen, XU Chunming, SUI Zhiyu

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 1,   Pages 74-79 doi: 10.1007/s11705-008-0016-1

Abstract: The effects of reaction temperature, mass ratio of catalyst to oil, space velocity, and mass ratio of water to oil on the product distribution, the yields of light olefins (light olefins including ethylene, propylene and butylene) and the composition of the fluid catalytic cracking (FCC) gasoline upgraded over the self-made catalyst GL in a confined fluidized bed reactor were investigated. The experimental results showed that FCC gasoline was obviously reformulated under appropriate reaction conditions. The olefins (olefins with C atom number above 4) content of FCC gasoline was markedly reduced, and the aromatics content and octane number were increased. The upgraded gasoline met the new standard of gasoline, and meanwhile, higher yields of light olefins were obtained. Furthermore, higher reaction temperature, higher mass ratio of catalyst to oil, higher mass ratio of water to oil, and lower space velocity were found to be beneficial to FCC gasoline reformulation and light olefins production.
HTML PDF Collect

Influence of increasing numbers of RE-inverters on the power quality in the distribution grids: A PQ

Przemyslaw JANIK, Grzegorz KOSOBUDZKI, Harald SCHWARZ

Frontiers in Energy 2017, Volume 11, Issue 2,   Pages 155-167 doi: 10.1007/s11708-017-0469-3

Abstract: This paper presents the selected power quality (PQ) indicia of a wind generator and a photovoltaic installation considered to be the representative of medium voltage and low voltage distribution grids. The analysis of measured values suggests that the decrease in PQ is a case of specific combination of distributed generation, grid parameters and load behaviour. Modern generators have a limited impact on PQ. On the other hand, fluctuations in power generation are regarded as an emerging PQ indicator. The growing number of distributed renewable installations causes stochastic, variable, and hardly predictable power flows in the distribution grid. The nature of fluctuations in wind and solar generation is different. In both cases, new indexes for the quantification of fluctuations are needed and are yet not standardised. Proper assessment of these fluctuations enables definition of useful fluctuation limits and rules for optimal storage system integration.

Keywords： power quality     harmonics     sags     photovoltaic(PV) system     doubly feed induction generator (DFIG)     inverters    

HTML PDF Collect

Breeding strategies for increasing yield potential in super hybrid rice

Shihua CHENG,Xiaodeng ZHAN,Liyong CAO

Frontiers of Agricultural Science and Engineering 2015, Volume 2, Issue 4,   Pages 277-282 doi: 10.15302/J-FASE-2015081

Abstract: Super hybrid rice breeding is a new breeding method combining semi-dwarf breeding and heterosis breeding using germplasm and gene-environment interactions. This paper reviews the breeding strategies of super hybrid rice breeding in China, focusing on the utilization of heterosis of indica and japonica subspecies, construction of ideal plant architecture and pyramiding of disease resistant genes in restorer lines. To develop super hybrid rice, considerable effort should be made to explore genes related with high yield, good quality, resistance to pests and diseases, tolerance to stresses. Molecular breeding methods in combination with crossing techniques should be adopted in super hybrid rice breeding.

Keywords： super hybrid rice     breeding strategies     yield potential    

HTML PDF Collect

Study of mechanism of activating flux increasing weld penetration of AC A-TIG welding for aluminum alloy

HUANG Yong, FAN Ding, FAN Qinghua

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 4,   Pages 442-447 doi: 10.1007/s11465-007-0076-9

Abstract: When multi-component flux AF305 is used as surface activating flux for an aluminum alloy, the weld pene tration of activating flux-tungsten inert-gas (A-TIG) welding is over two times more than that of conventional TIG welding. Using A-TIG welding with the modes of alternating current (AC), direct current electrode negative (DCEN) and direct current electrode positive (DCEP), respectively, the flux differently affects weld penetration when the polarity is different. After studied the effect of compelled arc con striction on weld penetration of AC welding, it is believed that the constriction of the whole arc root is not the main mechanism that flux AF305 dramatically improves weld penetration. The penetration has a relationship with the separate distribution of slag on the weld surface. Then, an observation of scanning electron microscopy (SEM) and an electronic data systems (EDS) analysis of slag were performed respectively. The separate distribution of slag on the weld pool during welding and the great constriction of arc spots were confirmed by TIG welding with helium shielding gas. The relationship between slag distribution and weld penetration was studied by adding aluminum powder into flux AF305 to change the distribution of slag. During welding, the separate distribution of slag on the weld pool results in the great constriction of arc spots, an increase in arc spot force, and an increase in Lorentz force within the arc and weld pool. Finally, the weld penetration is increased.

Keywords： A-TIG welding     surface     DCEN     electrode negative     increase    

HTML PDF Collect

Innovation and Trend of Gears-Technology

Liang Guiming

Strategic Study of CAE 2000, Volume 2, Issue 3,   Pages 1-6

Abstract:

The trend of innovation of gears in the coming 50 years will be seeking miniaturization, puification

Keywords： gears     innovation     trend    

HTML PDF Collect

Increasing significance of advanced physical/chemical processes in the development and application of

RULKENS Wim

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 4,   Pages 385-396 doi: 10.1007/s11783-008-0073-1

Abstract: Currently, there is an increasing need for the beneficial reuse of treated wastewater and to recover

Keywords： control     beneficial     valuable     scarcity     Development    

HTML PDF Collect

Trend detection and stochastic simulation prediction of streamflow at Yingluoxia hydrological station

Chenglong ZHANG,Mo LI,Ping GUO

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 1,   Pages 81-96 doi: 10.15302/J-FASE-2016112

Abstract: The results indicated there was a significant long-term increasing trend.

Keywords： Monte Carlo     nonstationary     trend detection     streamflow prediction     decomposition and ensemble     Yingluoxia    

HTML PDF Collect

Temporal trend of mortality from major cancers in Xuanwei, China

Hualiang Lin,Bofu Ning,Jihua Li,Guangqiang Zhao,Yunchao Huang,Linwei Tian

Frontiers of Medicine 2015, Volume 9, Issue 4,   Pages 487-495 doi: 10.1007/s11684-015-0413-z

Abstract: This study aimed to investigate the temporal trend of eight major cancers in Xuanwei County using datamortality rates for all other types of cancer were lower than those of the national average, but an increasingtrend was observed for all the cancers, particularly from 1990–1992 to 2004–2005.The temporal trend could be partly explained by changes in risk factors, but it also may be due to theepidemiological studies are warranted to systematically examine the underlying reasons for the temporal trend

Keywords： cancer     mortality     Xuanwei     temporal trend    

HTML PDF Collect

Detection of critical road roughness sections by trend analysis and investigation of driver speed interaction

Meltem SAPLIOGLU; Ayse UNAL; Melek BOCEK

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 4,   Pages 515-532 doi: 10.1007/s11709-022-0814-4

Abstract: These data were analysed using the distance-dependent Mann-Kendall trend analysis method and checkerboard

Keywords： trend analysis     checkerboard model     IRI     driver speed    

HTML PDF Collect

Atomic and close-to-atomic scale manufacturing—A trend in manufacturing development

Fengzhou FANG

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 4,   Pages 325-327 doi: 10.1007/s11465-016-0402-1

Abstract:

Manufacturing is the foundation of a nation’s economy. It is the primary industry to promote economic and social development. To accelerate and upgrade China’s manufacturing sector from “precision manufacturing” to “high-performance and high-quality manufacturing”, a new breakthrough should be found in terms of achieving a “leap-frog development”. Unlike conventional manufacturing, the fundamental theory of “Manufacturing 3.0” is beyond the scope of conventional theory; rather, it is based on new principles and theories at the atomic and/or close-to-atomic scale. Obtaining a dominant role at the international level is a strategic move for China’s progress.

Keywords： atomic manufacturing     Manufacturing 3.0     Manufacturing 2025     Industry 4.0    

HTML PDF Collect

Innovation-driven trend shaping COVID-19 vaccine development in China

Frontiers of Medicine doi: 10.1007/s11684-023-1034-6

Abstract: Confronted with the coronavirus disease 2019 (COVID-19) pandemic, China has become an asset in tackling the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) transmission and mutation, with several innovative platforms, which provides various technical means in this persisting combat. Derived from collaborated researches, vaccines based on the spike protein of SARS-CoV-2 or inactivated whole virus are a cornerstone of the public health response to COVID-19. Herein, we outline representative vaccines in multiple routes, while the merits and plights of the existing vaccine strategies are also summarized. Likewise, new technologies may provide more potent or broader immunity and will contribute to fight against hypermutated SARS-CoV-2 variants. All in all, with the ultimate aim of delivering robust and durable protection that is resilient to emerging infectious disease, alongside the traditional routes, the discovery of innovative approach to developing effective vaccines based on virus properties remains our top priority.

Keywords： SARS-CoV-2     COVID-19 vaccine     vaccine development    

HTML PDF Collect

Globalization of R&D： New Trend of Economy Globalization

Zhang Yanzhong

Strategic Study of CAE 2005, Volume 7, Issue 9,   Pages 14-17

Abstract:

The profound influence of economy globalization on the progress of the world, especially the impact on the development of China is described. It proposes that the globalization of R&D is a new stage of economy globalization. The rapid development of TNCs’ R&D in China is presented. The opportunities and challenges of R&D globalization for both developed and developing countries are discussed. The measures for encouraging globalization of R&D for developed, developing countries and UN are suggested.

Keywords： globalization of R&D     economy globalization     TNCs     R&D center     new trend    

HTML PDF Collect

The development trend and practical innovation of smart cities under the integration of new technologies

Xiaohong CHEN

Frontiers of Engineering Management 2019, Volume 6, Issue 4,   Pages 485-502 doi: 10.1007/s42524-019-0057-9

Abstract: Smart cities have rapidly developed in the context of the integration of new digital technologies such as big data, Internet of Things, artificial intelligence, blockchains, and virtual reality. These cities have conducted practical innovations and typical cases in many sectors, such as in government, transportation, environmental protection, energy, medical care, and logistics, and have produced many social, economic, and ecological benefits. However, there are still some problems that continue to hinder the construction of smart cities. This paper examines such problems in depth and proposes some relevant countermeasures and suggestions.

Keywords： new technology integration     smart city     big data     practical innovation    

HTML PDF Collect

U-shaped microRNA expression pattern could be a new concept biomarker for environmental estrogen

Rui Duan, Yun Lu, Lingyan Hou, Lina Du, Lequn Sun, Xingfan Tang

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 6, doi: 10.1007/s11783-016-0880-8

Abstract: Nonmonotonic dose-response in prostate could be a component of estrogen signature.indicate that the prostate is a reliable organ for evaluating estrogenic activity and that the typical nonmonotonic

Keywords： miRNA     Prostate     Estradiol     Nonmonotonic dose-response     Estrogenicity     Drosha    

HTML PDF Collect

Title Author Date Type Operation

Numerical study on laminar flame speed of natural gas-carbon monoxide-air mixtures

Chen DONG, Qulan ZHOU, Qinxin ZHAO, Tongmo XU, Shi’en HUI

Journal Article

Study on reformulation of fluid catalytic cracking gasoline and increasing production of light olefins

YAN Pingxiang, MENG Xianghai, GAO Jinsen, XU Chunming, SUI Zhiyu

Journal Article

Influence of increasing numbers of RE-inverters on the power quality in the distribution grids: A PQ

Przemyslaw JANIK, Grzegorz KOSOBUDZKI, Harald SCHWARZ

Journal Article

Breeding strategies for increasing yield potential in super hybrid rice

Shihua CHENG,Xiaodeng ZHAN,Liyong CAO

Journal Article

Study of mechanism of activating flux increasing weld penetration of AC A-TIG welding for aluminum alloy

HUANG Yong, FAN Ding, FAN Qinghua

Journal Article

Innovation and Trend of Gears-Technology

Liang Guiming

Journal Article

Increasing significance of advanced physical/chemical processes in the development and application of

RULKENS Wim

Journal Article

Trend detection and stochastic simulation prediction of streamflow at Yingluoxia hydrological station

Chenglong ZHANG,Mo LI,Ping GUO

Journal Article

Temporal trend of mortality from major cancers in Xuanwei, China

Hualiang Lin,Bofu Ning,Jihua Li,Guangqiang Zhao,Yunchao Huang,Linwei Tian

Journal Article

Detection of critical road roughness sections by trend analysis and investigation of driver speed interaction

Meltem SAPLIOGLU; Ayse UNAL; Melek BOCEK

Journal Article

Atomic and close-to-atomic scale manufacturing—A trend in manufacturing development

Fengzhou FANG

Journal Article

Innovation-driven trend shaping COVID-19 vaccine development in China

Journal Article

Globalization of R&D： New Trend of Economy Globalization

Zhang Yanzhong

Journal Article

The development trend and practical innovation of smart cities under the integration of new technologies

Xiaohong CHEN

Journal Article

U-shaped microRNA expression pattern could be a new concept biomarker for environmental estrogen

Rui Duan, Yun Lu, Lingyan Hou, Lina Du, Lequn Sun, Xingfan Tang

Journal Article