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Z-scheme CdS/WO on a carbon cloth enabling effective hydrogen evolution

Frontiers in Energy 2021, Volume 15, Issue 3,   Pages 678-686 doi: 10.1007/s11708-021-0768-6

Abstract: Herein, a direct Z-scheme CdS/WO3 composite photocatalyst was fabricated based on carbon cloth

Keywords： photocatalysis     CdS/WO3     carbon cloth     Z-scheme     hydrogen evolution    

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ZnFe2O4/BiVO4 Z-scheme heterojunction for efficient visible-light photocatalytic

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 11,   Pages 1728-1740 doi: 10.1007/s11705-023-2322-z

Abstract: A novel Z-scheme ZnFe2O4/BiVO4 heterojunction photocatalyst was successfullysub> demonstrated considerably enhanced photogenerated charge separation efficiencies because of the Z-schemeThis study thus provides a promising Z-scheme heterojunction photocatalyst for the efficient removal

Keywords： ZnFe2O4/BiVO4     Z-scheme heterojunction     photocatalytic degradation    

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Utilizing transparent and conductive SnO

Jing Gu, Hongtao Yu, Xie Quan, Shuo Chen, Junfeng Niu

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 4, doi: 10.1007/s11783-020-1251-z

Abstract: Abstract • A novel Z-scheme Si-SnO2-TiOx with SnO2 as electron mediator is first constructed. • TransparentZ-scheme photocatalysts, with strong redox ability, have a great potential for pollutants degradationHowever, it is challenging to construct efficient Z-scheme photocatalysts because of their poor interfacialThe Z-scheme photocatalyst displayed an order of magnitude higher photocurrent density and a 4-fold increaseIntroducing a transparent and conductive electron mediator to construct Z-scheme photocatalyst gives

Keywords： Z-scheme photocatalyst     Tin oxide     Electron mediator     Organic pollutant    

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Application of Z-source inverter in the asynchronous motor

Zhu Hong,Zhu Longji and Xia Ruofei

Strategic Study of CAE 2014, Volume 16, Issue 3,   Pages 86-91

Abstract: this paper，the IFOC technology is used to control the size of the speed of asynchronous motor，and the Z-

Keywords： IFOC     asynchronous motor     Z-source inverter    

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Exergy analysis of R1234ze(Z) as high temperature heat pump working fluid with multi-stage compression

WANG, R.Z. WANG

Frontiers in Energy 2017, Volume 11, Issue 4,   Pages 493-502 doi: 10.1007/s11708-017-0510-6

Abstract: and exergy analysis of multi-stage compression high temperature heat pump (HTHP) systems with R1234ze(Z)

Keywords： multi-stage compression     high temperature heat pump     heat recovery     exergy destruction     R1234ze(Z) working    

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TODIM and TOPSIS with Z-numbers None

Renato A. KROHLING, André G. C. PACHECO, Guilherme A. dos SANTOS

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 2,   Pages 283-291 doi: 10.1631/FITEE.1700434

Abstract:

In this paper, we present an approach that can handle Z-numbers in the context of multi-criteria decision-makingThe concept of Z-number as an ordered pair Z=(A, B) of fuzzy numbers A and BZ-numbers are converted to fuzzy numbers.Then the Z-TODIM and Z-TOPSIS are presented as a direct extension of the fuzzy TODIM and fuzzy TOPSIS

Keywords： Multi-criteria decision-making     TODIM     TOPSIS     Fuzzy number     Z-number    

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Fast Z-Pinch—a New Approach for Promising Fusion Energy

Peng Xianjue,Hua Xinsheng

Strategic Study of CAE 2008, Volume 10, Issue 1,   Pages 47-53

Abstract:

The basic concept of fast Z-Pinch, and late progress in fast Z-pinchlow-cost fusion energy research, are summarized in this paper.The possible technical challenges of fast Z-Pinch

Keywords： fast Z-Pinch implosion     HEDP     ICF     fusion energy    

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Optimal signal design strategywith improper Gaussian signaling in the Z-interference channel Article

Dan LI, Shan WANG, Fang-lin GU

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 11,   Pages 1900-1912 doi: 10.1631/FITEE.1700030

Abstract: Pareto boundary (boundary of the achievable rate region) with improper Gaussian signaling (IGS) on the Z-interferencechannel (Z-IC) under the assumption that the interference is treated as additive Gaussian noise.In each scheme, we derive several concise closed-form expressions to calculate each user’s optimally

Keywords： Z-interference channel     Improper Gaussian signaling     Sum-rate     Pareto boundary     Covariance     Pseudo-covariance    

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Fire hazard in transportation infrastructure: Review, assessment, and mitigation strategies

Z. NASER

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1,   Pages 46-60 doi: 10.1007/s11709-020-0676-6

Abstract: This paper reviews the fire problem in critical transportation infrastructures such as bridges and tunnels. The magnitude of the fire problem is illustrated, and the recent increase in fire problems in bridges and tunnels is highlighted. Recent research undertaken to address fire problems in transportation structures is reviewed, as well as critical factors governing the performance of those structures. Furthermore, key strategies recommended for mitigating fire hazards in bridges and tunnels are presented, and their applicability to practical situations is demonstrated through a practical case study. Furthermore, research needs and emerging trends for enhancing the “state-of-the-art” in this area are discussed.

Keywords： fire hazard     bridges     tunnels     fire resistance     mitigation strategies     transportation infrastructure    

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Electrostatic Spring Effect Analysis and Experimental Validation of Silicon Micromechanical Vibrating z

Xia Dunzhu,Zhou Bailing,Wang Shourong

Strategic Study of CAE 2007, Volume 9, Issue 8,   Pages 66-68

Abstract: justify;">The error principle caused by structural process imperfection of silicon micromechanical z-axiscomputing the relation between the resonant frequency and feedback force added on the sense mode of MEMS z-axishas been testified by experiment,  which will lay foundation for the next design of closed-loop scheme

Keywords： silicon micromechanical z-axis gyroscope     negative electrostatic spring constant     feedback force generator    

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Development of high pulsed-power source based on linear transformer driver for direct-driven Z pinch

Sun Fengju,Qiu Aici,Zeng Zhengzhong,Zeng Jiangtao,Cong Peitian

Strategic Study of CAE 2009, Volume 11, Issue 11,   Pages 56-63

Abstract: source based on fast linear transformer driver (FLTD), and summarized the latest developments of FLTD-Zmodule and the conception design of pulsed power source based on FLTD such as Z-POP for verifying the

Keywords： fast Z pinch     direct driven     FLTD pulsed-power source     high power pulsed accelerator     conception design    

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Upgrading of derived pyrolysis vapors for the production of biofuels from corncobs

Liaoyuan Mao, Yanxin Li, Z. Conrad Zhang

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 1,   Pages 50-58 doi: 10.1007/s11705-017-1685-4

Abstract: A bubbling fluidized bed pyrolyzer was integrated with an honeycomb as a catalytic upgrading zone for the conversion of biomass to liquid fuels. In the upgrading zone, zeolite coated ceramic honeycomb (ZCCH) catalysts consisting of ZSM-5 (Si/Al=25) were stacked and N or recycled non-condensable gas was used as a carrier gas. Ground corncob particles were fast pyrolyzed in the bubbling bed using fine sand particles as a heat carrier and the resulting pyrolysis vapors were passed on-line over the catalytic upgrading zone. The influence of carrier gas, temperature, and weight hourly space velocity (WHSV) of catalyst on the oil product properties, distribution and mass balance were studied. Using ZCCH effectively increased the hydrocarbon yield and the heating value of the dry oil, especially in the presence of the recycled noncondensable gas. Even a low usage of zeolite catalyst at WSHV of 180 h was effective in upgrading the pyrolysis oil and other light olefins. The highest hydrocarbon (≥C2) and liquid aromatics yields reached to 14.23 and 4.17 wt-%, respectively. The undesirable products including light oxygenates, furans dramatically decreased in the presence of the ZCCH catalyst.

Keywords： corncob     monolith     upgrading     pyrolysis    

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Predicting the response of continuous RC deep beams under varying levels of differential settlement

Z. NASER, R. A. HAWILEH

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 3,   Pages 686-700 doi: 10.1007/s11709-018-0506-2

Abstract: This paper investigates the effect of differential support settlement on shear strength and behavior of continuous reinforced concrete (RC) deep beams. A total of twenty three-dimensional nonlinear finite element models were developed taking into account various constitutive laws for concrete material in compression (crushing) and tension (cracking), steel plasticity (i.e., yielding and strain hardening), bond-slip at the concrete and steel reinforcement interface as well as unique behavior of spring-like support elements. These models are first validated by comparing numerical predictions in terms of load-deflection response, crack propagation, reaction distribution, and failure mode against that of measured experimental data reported in literature. Once the developed models were successfully validated, a parametric study was designed and performed. This parametric study examined number of critical parameters such as ratio and spacing of the longitudinal and vertical reinforcement, compressive and tensile strength of concrete, as well as degree (stiffness) and location of support stiffness to induce varying levels of differential settlement. This study also aims at presenting a numerical approach using finite element simulation, supplemented with coherent assumptions, such that engineers, practitioners, and researchers can carry out simple, but yet effective and realistic analysis of RC structural members undergoing differential settlements due to variety of load actions.

Keywords： concrete     continuous beams     deep beams     finite element modeling     support settlement    

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Heat transfer of phase change materials (PCMs) in porous materials

C Y ZHAO, D ZHOU, Z G WU

Frontiers in Energy 2011, Volume 5, Issue 2,   Pages 174-180 doi: 10.1007/s11708-011-0140-3

Abstract: In this paper, the feasibility of using metal foams to enhance the heat transfer capability of phase change materials (PCMs) in low- and high-temperature thermal energy storage systems was assessed. Heat transfer in solid/liquid phase change of porous materials (metal foams and expanded graphite) at low and high temperatures was investigated. Organic commercial paraffin wax and inorganic calcium chloride hydrate were employed as the low-temperature materials, whereas sodium nitrate was used as the high-temperature material in the experiment. Heat transfer characteristics of these PCMs embedded with open-cell metal foams were studied. Composites of paraffin and expanded graphite with a graphite mass ratio of 3%, 6%, and 9% were developed. The heat transfer performances of these composites were tested and compared with metal foams. The results indicate that metal foams have better heat transfer performance due to their continuous inter-connected structures than expanded graphite. However, porous materials can suppress the effects of natural convection in liquid zone, particularly for PCMs with low viscosities, thereby leading to different heat transfer performances at different regimes (solid, solid/liquid, and liquid regions). This implies that porous materials do not always enhance heat transfer in every regime.

Keywords： heat transfer     thermal energy storage     phase change materials     natural convection     porous media    

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Evaluation of transmissibility for a class of nonlinear passive vibration isolators

Z. K. PENG, Z. Q. LANG, G. MENG

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 4,   Pages 401-409 doi: 10.1007/s11465-012-0349-9

Abstract:

In this study, the concept of Output Frequency Response Functions (OFRFs) is applied to represent the transmissibility of nonlinear isolators in frequency domain. With the OFRFs estimated from numerical simulation responses, an explicit analytical relationship between the transmissibility and the nonlinear characteristic parameters is derived for a wide class of nonlinear isolators that have nonlinear anti-symmetric damping characteristics and a comprehensive pattern about how the nonlinear damping characteristic parameters might affect the force and displacement transmissibility is built for the vibration isolators. The results reveal that it is reasonable to analyze the force and displacement transmissibility of the nonlinear isolators by simply investigating the fundamental harmonic components of the force and displacement outputs of the nonlinear isolators, and the introduction of a nonlinear anti-symmetric damping into vibration isolators can significantly suppress both the force and displacement transmissibility over the resonant frequency region, but has almost no effect on the transmissibility at non-resonant regions. These conclusions are of significant importance in the analysis and design of the nonlinear vibration isolators with nonlinear anti-symmetric damping.

Keywords： nonlinear vibration     volterra series     Output Frequency Response Functions (OFRFs)     nonlinear damping     vibration isolator    

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Title Author Date Type Operation

Z-scheme CdS/WO on a carbon cloth enabling effective hydrogen evolution

Journal Article

ZnFe2O4/BiVO4 Z-scheme heterojunction for efficient visible-light photocatalytic

Journal Article

Utilizing transparent and conductive SnO

Jing Gu, Hongtao Yu, Xie Quan, Shuo Chen, Junfeng Niu

Journal Article

Application of Z-source inverter in the asynchronous motor

Zhu Hong,Zhu Longji and Xia Ruofei

Journal Article

Exergy analysis of R1234ze(Z) as high temperature heat pump working fluid with multi-stage compression

WANG, R.Z. WANG

Journal Article

TODIM and TOPSIS with Z-numbers

Renato A. KROHLING, André G. C. PACHECO, Guilherme A. dos SANTOS

Journal Article

Fast Z-Pinch—a New Approach for Promising Fusion Energy

Peng Xianjue,Hua Xinsheng

Journal Article

Optimal signal design strategywith improper Gaussian signaling in the Z-interference channel

Dan LI, Shan WANG, Fang-lin GU

Journal Article

Fire hazard in transportation infrastructure: Review, assessment, and mitigation strategies

Z. NASER

Journal Article

Electrostatic Spring Effect Analysis and Experimental Validation of Silicon Micromechanical Vibrating z

Xia Dunzhu,Zhou Bailing,Wang Shourong

Journal Article

Development of high pulsed-power source based on linear transformer driver for direct-driven Z pinch

Sun Fengju,Qiu Aici,Zeng Zhengzhong,Zeng Jiangtao,Cong Peitian

Journal Article

Upgrading of derived pyrolysis vapors for the production of biofuels from corncobs

Liaoyuan Mao, Yanxin Li, Z. Conrad Zhang

Journal Article

Predicting the response of continuous RC deep beams under varying levels of differential settlement

Z. NASER, R. A. HAWILEH

Journal Article

Heat transfer of phase change materials (PCMs) in porous materials

C Y ZHAO, D ZHOU, Z G WU

Journal Article

Evaluation of transmissibility for a class of nonlinear passive vibration isolators

Z. K. PENG, Z. Q. LANG, G. MENG

Journal Article