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Effect of current density on groundwater arsenite removal performance using air cathode electrocoagulation

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1399-1

Abstract:

• With the same charge, current density had little effect on As(III)

Keywords： Electrocoagulation Air cathode Arsenic Current density Energy consumption

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EGG PRODUCTION IN CHINA: CURRENT STATUS AND OUTLOOK

Ning YANG

Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 1, Pages 25-34 doi: 10.15302/J-FASE-2020363

Abstract: Eggs are one of the most nutritious and affordable animal products worldwide. From 1985, egg production in China has retained the leading place in the world. A total of 33 Mt of eggs were produced in 2019 representing ˃ 40% of the world total production. Egg production in China is characterized by diversity in several aspects, including layer breeds, products and production systems. New breeds and synthetic lines are developed to improve the genetic potentials of egg production and feed efficiency of layers. In the past, layer farms were run mostly by small households with 100 to 1000 layers per farm. Over the past decades, egg production in China has developed toward standardization and expansion of production systems, and many of these modern intensive farms raise millions of layers. Although the Chinese egg products maintain strong competitiveness over other animal products and imported egg products, the egg industry will grow at a slower pace compared to the past. Chinese consumers are more concerned about the quality and safety of eggs and egg products, as well as the environmental issues related to animal production, which presents challenges for the Chinese egg industry.

Keywords： poultry farms China diversity egg production trends

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A New Real-time Detecting Method for Harmonic Current Based on Iterative Algorithm in Active Power Filter

Li Zicheng,Sun Yukun

Strategic Study of CAE 2006, Volume 8, Issue 1, Pages 46-50

Abstract: Based on the foundation of load current analysis, a new real-time detecting method for harmonic current

Keywords： active power filter harmonics current active current reactive current

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EGG PRODUCTION IN CHINA: CURRENT STATUS AND OUTLOOK

Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 1, Pages 25-34

Abstract:

• China is now the largest egg production country worldwide

• Egg production in China is characterized by diversity in several aspects

• China is now capable of breeding new varieties, with more than 50% of the market share

• Policies have been implemented to ensure sustainable development of egg production

• Integrating crop-chicken-vegetable production system is established

Eggs are one of the most nutritious and affordable animal products worldwide. From 1985, egg production in China has retained the leading place in the world. A total of 33 Mt of eggs were produced in 2019 representing ˃ 40% of the world total production. Egg production in China is characterized by diversity in several aspects, including layer breeds, products and production systems. New breeds and synthetic lines are developed to improve the genetic potentials of egg production and feed efficiency of layers. In the past, layer farms were run mostly by small households with 100 to 1000 layers per farm. Over the past decades, egg production in China has developed toward standardization and expansion of production systems, and many of these modern intensive farms raise millions of layers. Although the Chinese egg products maintain strong competitiveness over other animal products and imported egg products, the egg industry will grow at a slower pace compared to the past. Chinese consumers are more concerned about the quality and safety of eggs and egg products, as well as the environmental issues related to animal production, which presents challenges for the Chinese egg industry.

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New method to determine optimum impedance of fault current limiters for symmetrical and/or asymmetrical None

Mahmoud MODARESI, Hamid LESANI

Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 2, Pages 297-307 doi: 10.1631/FITEE.1601689

Abstract: To select the type and value of the impedance of fault current limiters (FCLs) for power network designersoptimization of FCL impedance is based on a goal function that maximizes the reduction of the fault current

Keywords： Fault current limiter (FCL) FCL impedance Short circuit current Fault current Power system

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Current situation and development of wind power in China

BAO Nengsheng, NI Weidou

Frontiers in Energy 2007, Volume 1, Issue 4, Pages 371-383 doi: 10.1007/s11708-007-0056-4

Abstract: The current development of wind power in China was presented in this paper.

Keywords： Xinjiang current development Mongolia Autonomous southeast coastal Autonomous

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Circumcision of preschool boys in Baghdad, Iraq: prevalence, current practice and complications

Hussein Naji, Rajaa Mustafa

Frontiers of Medicine 2013, Volume 7, Issue 1, Pages 122-125 doi: 10.1007/s11684-013-0242-x

Abstract: study is to assess the prevalence of circumcision in preschool boys and to present an overview of the current

Keywords： circumcision children prevalence religious complications

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Numerical modeling of current-induced scour around multi-wall foundation using large-eddy simulation

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4, Pages 546-565 doi: 10.1007/s11709-023-0943-4

Abstract: Scouring is one of the primary triggers of failure for bridges across rivers or seas. However, research concerning the scour mechanism of multi-wall foundations (MWFs) remains scarce, hindering the further application of MWFs. In this study, for the first time, the scouring effect caused by unidirectional flow around MWFs was examined numerically using FLOW-3D involving a large-eddy simulation. Initially, the applicability of the scouring model and input parameters was validated using a case study based on published measured data. Subsequently, the scouring effects of four MWFs with different wall arrangements and inflow angles, including the flow field analysis and scour pit and depth, were investigated thoroughly. It was found that the maximum scour depth of MWFs with an inflow angle of 0° was smaller than that of those with an inflow angle of 45°, regardless of the wall arrangement. Meanwhile, changing the inflow angle significantly affects the scour characteristics of MWFs arranged in parallel. In practical engineering, MWFs arranged in parallel are preferred considering the need for scouring resistance. However, a comparative analysis should be performed to consider comprehensively whether to adopt the form of a round wall arrangement when the inflow angle is not 0° or the inflow direction is changeable.

Keywords： multi-wall foundation current-induced scour bridge foundation large-eddy simulation numerical analysis

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Effect of counter current gas phase on liquid film

Shujuan LUO, Huaizhi LI, Weiyang FEI, Yundong WANG

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 2, Pages 135-137 doi: 10.1007/s11705-009-0129-1

Abstract: The effect of counter current gas phase on the liquid film was taken into consideration.by 57% because of increasing liquid flow rate, while it decreased by 25% resulting from the counter current

Keywords： counter current liquid film two phases structured packings

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Fault tolerant control strategy for modular PWM current source inverter

Frontiers in Energy 2023, Volume 17, Issue 2, Pages 228-238 doi: 10.1007/s11708-022-0852-6

Abstract: fault-tolerant control method for an input-series output-parallel modular grid-tied pulse-width modulation (PWM) currentThis method actively offsets the neutral point of the current space vector to ensure a sinusoidal outputof the grid current, and it can achieve the upper limit power of the inverter under the condition ofIn addition, an active damping control method based on grid harmonic current feedback is proposed aftersuppresses the resonance caused by the transformer and the modified modulation, improving the grid current

Keywords： current source converter (CSC) fault-tolerant control space vector modulation active damping resonance

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Catalysis of semihydrogenation of acetylene to ethylene: current trends, challenges, and outlook

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 7, Pages 1031-1059 doi: 10.1007/s11705-021-2113-3

Abstract: Ethylene is an important feedstock for various industrial processes, particularly in the polymer industry. Unfortunately, during naphtha cracking to produce ethylene, there are instances of acetylene presence in the product stream, which poisons the Ziegler–Natta polymerization catalysts. Thus, appropriate process modification, optimization, and in particular, catalyst design are essential to ensure the production of highly pure ethylene that is suitable as a feedstock in polymerization reactions. Accordingly, carefully selected process parameters and the application of various catalyst systems have been optimized for this purpose. This review provides a holistic view of the recent reports on the selective hydrogenation of acetylene. Previously published reviews were limited to Pd catalysts. However, effective new metal and non-metal catalysts have been explored for selective acetylene hydrogenation. Updates on this recent progress and more comprehensive computational studies that are now available for the reaction are described herein. In addition to the favored Pd catalysts, other catalyst systems including mono, bimetallic, trimetallic, and ionic catalysts are presented. The specific role(s) that each process parameter plays to achieve high acetylene conversion and ethylene selectivity is discussed. Attempts have been made to elucidate the possible catalyst deactivation mechanisms involved in the reaction. Extensive reports suggest that acetylene adsorption occurs through an active single-site mechanism rather than via dual active sites. An increase in the reaction temperature affords high acetylene conversion and ethylene selectivity to obtain reactant streams free of ethylene. Conflicting findings to this trend have reported the presence of ethylene in the feed stream. This review will serve as a useful resource of condensed information for researchers in the field of acetylene-selective hydrogenation.

Keywords： selectivity hydrogenation acetylene ethylene palladium

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Role of Akkermansia muciniphila in the development of nonalcoholic fatty liver disease: current knowledge

Frontiers of Medicine 2022, Volume 16, Issue 5, Pages 667-685 doi: 10.1007/s11684-022-0960-z

Abstract: Here, the current knowledge on the role of A. muciniphila in the progression of NAFLD was summarized

Keywords： Akkermansia muciniphila NAFLD NASH steatosis inflammation

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Eddy current measurement of the thickness of top Cu film of the multilayer interconnects in the integrated

Zilian QU,Yonggang MENG,Qian ZHAO

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 1, Pages 1-6 doi: 10.1007/s11465-015-0325-2

Abstract:

This paper proposes a new eddy current method, named equivalent unit method (EUM), for the thicknessThe influence of the underneath circuit layers on the eddy current is modeled and treated as an equivalentequivalent film component, the accuracy of the thickness measurement of the top copper layer with an eddy current

Keywords： CMP eddy current multilayer wafer Cu interconnects equivalent unit

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Assessment of robustness of structures: Current state of research

Colin BRETT, Yong LU

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 4, Pages 356-368 doi: 10.1007/s11709-013-0220-z

Abstract: This paper is aimed to provide a general overview of the current state of research concerning structural

Keywords： structural robustness abnormal exposure vulnerability collapse consequence

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Series transformer based diode-bridge-type solid state fault current limiter

Amir HEIDARY,Hamid RADMANESH,Seyed Hamid FATHI,G. B. GHAREHPETIAN

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 9, Pages 769-784 doi: 10.1631/FITEE.1400428

Abstract: We propose a novel series transformer based diode-bridge-type solid state fault current limiter (SSFCLBased on this RLC branch, two current limiting modes are created.In the second mode, the series reactor impedance is not enough to limit the fault current.Then, by controlling the magnitude of the DC reactor current, the fault current is reduced and the voltageThe proposed SSFCL can limit the fault current without any delay and successfully smooth the fault current

Keywords： Solid state fault current limiter (SSFCL) Power quality Voltage sag Point of common coupling (PCC)