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A 0.20–2.43 GHz fractional-

Wei Zou, Daming Ren, Xuecheng Zou,weizou@hust.edu.cn,damingren@hust.edu.cn,estxczou@hust.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 2,   Pages 141-286 doi: 10.1631/FITEE.1900653

Abstract: A CP with a mismatch suppression architecture is proposed to improve the current match of the CP and

Keywords： Frequency synthesizer     Charge pump (CP)     Voltage-controlled oscillator (VCO)     Current mismatch     Phase    

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Computer-Aided Design System for CP Single-Screw Compressor

SHEN Jing-feng, YAO Fu-sheng

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 1,   Pages 21-25 doi: 10.1007/s11465-005-0018-3

Abstract:

To design various optimum parameters and simulate the working process of CP single-screw compressor, the Computer-Aided Design (CAD) system for the CP single-screw compressor has been established.parameterization design function and animator simulation function based on analyzing the working principle of the CPThe experimental results show that the CAD system for the CP single-screw compressor is practical and

Keywords： CP single-screw     database technology     simulation technology     programming technology     animator simulation    

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Charge-carrier photogeneration and extraction dynamics of polymer solar cells probed by a transient photocurrentnearby the regime of the space charge-limited current

Boa Jin, Hyunmin Park, Yang Liu, Leijing Liu, Jongdeok An, Wenjing Tian, Chan Im

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 1,   Pages 164-179 doi: 10.1007/s11705-020-1976-z

Abstract: To understand the complex behaviors of photogenerated charge carriers within polymer-based bulk-heterojunction-typesolar cells, the charge-carrier photogeneration and extraction dynamics are simultaneously estimatedand the number of the initially photogenerated charge carriers, the external quantum efficiencies asSubsequently, the charge-carrier concentration-dependent mobility values were obtained, and they areduring the charge-carrier extraction that also affects the photocurrent-trace shape.

Keywords： charge-carrier photogeneration     transient photocurrent     polymer solar cells     charge-carrier extraction     spacecharge-limited current    

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Elliptical lobe shape gerotor pump design to minimize wear

Mohammad Reza KARAMOOZ RAVARI

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 4,   Pages 429-434 doi: 10.1007/s11465-011-0247-6

Abstract:

The gerotor pumps are the most important parts of mechanical equipment that have a vast number of applications in industries and automobiles. Because the gerotor pumps cannot be adjusted for wear so it is important to reduce the wear as much as possible. In this paper first mathematical equations for elliptical lobe shape rotors profile and curvature of them have been derived and then Specific flow and wear rate proportional factor (WRPF) have been formulated. To reach the minimum wear in rotors teeth, the ellipse shape factor is changed for each value of number of outer rotor teeth in a feasible range and wear rate proportional factor has been resulted. Also in order to have better comparison specific flow has been presented. The obtained results have been compared with circular pumps with similar geometrical parameters and show the significant improvement in wear of the rotors with negligible changes in the specific flow.

Keywords： gerotor pump     elliptical lobe shape pump     wear rate proportional factor (WRPF)     specific flow    

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Extended two-fluid model applied to analysis of bubbly flow in multiphase rotodynamic pump impeller

Zhiyi YU, Guoyu WANG, Shuliang CAO

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 1,   Pages 53-59 doi: 10.1007/s11465-009-0006-0

Abstract: and air-water two-phase flow with the inlet gas volume fraction being 15% in a multiphase rotodynamic pumpimpeller and the pump head performance is predicted.

Keywords： two-fluid model     multiphase rotodynamic pump     SIMPLEC algorithm     numerical simulation    

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R&D of the ground-coupled heat pump technology in China

Nairen DIAO, Ping CUI, Junhong LIU, Zhaohong FANG,

Frontiers in Energy 2010, Volume 4, Issue 1,   Pages 47-54 doi: 10.1007/s11708-009-0080-3

Abstract: The ground-coupled heat pump (GCHP) systems have been identified as one of the best sustainable energy

Keywords： ground source heat pump     ground heat exchanger     HVAC     China    

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Evaluation of the performance of a centralized ground-water heat pump system in cold climate region

Shilei LU,Zhe CAI,Li ZHANG,Yiran LI

Frontiers in Energy 2014, Volume 8, Issue 3,   Pages 394-402 doi: 10.1007/s11708-014-0310-1

Abstract: The aim of this study is to evaluate the performance of a centralized open-loop ground-water heat pumpThe analysis of the testing data indicates that the average heat-pump coefficient of performance (COP

Keywords： ground-water heat pump (GWHP)     actual coefficient of performance     heat transfixion    

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Charge and separation characteristics of nanofiltration membrane embracing dissociated functional groups

Zhun MA,Meng WANG,Xueli GAO,Congjie GAO

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 5,   Pages 650-658 doi: 10.1007/s11783-013-0605-1

Abstract: The current work focused on the investigation of charge and separation characteristics of nanofiltrationThe electro-kinetic method was carried out to assess the membrane volume charge density ( ) with differentthat the dissociation of the hydrophilic functional groups and the specific adsorption contributed to chargeHowever, for type 3–1 electrolyte, specific adsorption should contribute to the charge effect to a largeMoreover, the correlation between the volume charge density and feed concentration was in accordance

Keywords： Sulfonated polyethersulfone nanofiltration membrane     charge characteristics     electro-kinetic method     volumecharge density     separation behavior    

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A valveless piezoelectric pump with novel flow path design of function of rectification to improve energy

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 3, doi: 10.1007/s11465-022-0685-3

Abstract: the proposed tubes were integrated into a piezo-driven chamber, and a novel valveless piezoelectric pumpUnlike previous pumps, the reported pump directed the reflux fluid to another flow channel different

Keywords： composite tube     valveless piezoelectric pump     rectification     energy efficiency    

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Absorption heat pump for waste heat reuse: current states and future development

Zhenyuan XU, Ruzhu WANG

Frontiers in Energy 2017, Volume 11, Issue 4,   Pages 414-436 doi: 10.1007/s11708-017-0507-1

Abstract: Absorption heat pump attracts increasing attention due to its advantages in low grade thermal energyIn this paper, three important aspects for absorption heat pump for waste heat reuse are reviewed.In the first part, different absorption heat pump cycles are classified and introduced., alcohol based working pairs, and halogenated hydrocarbon based working pairs, for absorption heat pumpIn the third part, the applications of the absorption heat pump and absorption heat transformer for waste

Keywords： absorption     heat pump     heat transformer     waste heat     working pair    

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Visible-light-driven heterostructured g-CN/Bi-TiO floating photocatalyst with enhanced charge carrier

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1417-3

Abstract:

• Bi doping in TiO2 enhanced the separation of photo-generated electron-hole.

Keywords： Bi doping     Visible light     Algal removal     Charge carrier separation    

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Numerical simulation of charge stratifications to improve combustion and NO formation of lean-burn SI

Zhijun PENG ,

Frontiers in Energy 2009, Volume 3, Issue 3,   Pages 353-358 doi: 10.1007/s11708-009-0035-8

Abstract: The influences of charge stratification on spark ignition (SI) engine combustion and NO emission werethe cylinder was divided spherically into three parts: a central core with a stoichiometric air-fuel charge, a dilution region without any combustible charge, and a mixing region lying between the core and theThe results indicate that the extent of combustible charge in the mixing region could reduce in-cylinderlong as the degree of dilution in the mixing region is within the dilution limit of the combustible charge

Keywords： charge stratification     SI engine     lean-burn combustion     NO emission    

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design of novel proton-pump inhibitors with reduced adverse effects

Xiaoyi Li, Hong Kang, Wensheng Liu, Sarita Singhal, Na Jiao, Yong Wang, Lixin Zhu, Ruixin Zhu

Frontiers of Medicine 2019, Volume 13, Issue 2,   Pages 277-284 doi: 10.1007/s11684-018-0630-3

Abstract: The development of new proton-pump inhibitors (PPIs) with less adverse effects by lowering the pKa values

Keywords： proton-pump inhibitor     adverse effect     pharmacological mechanism     toxicological mechanism     pKa calculation    

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Efficiency characteristics of piezostack pump for linear actuators

Junwu KAN, Kehong TANG, Chenghui SHAO, Guoren ZHU, Taijiang PENG,

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 4,   Pages 407-414 doi: 10.1007/s11465-009-0049-2

Abstract: A piezostack pump for linear actuators is presented and studied in terms of mechanical energy efficiencyConsidering the deflection of the pump chamber and dynamic response of the piezostack, the stiffness

Keywords： piezostack actuator     piezostack pump     mechanical efficiency     energy conversion efficiency (ECE)    

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membranes using SPES as a hydrophilic polymer for the effective removal of dyes via steric hindrance and charge

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10,   Pages 1555-1567 doi: 10.1007/s11705-023-2338-4

Abstract: separation method for effective fractionation of dyes based on the influence of steric hindrance and chargeresulted in a membrane with reduced pore size and molecular weight cut-off as well as amplified negative chargeThis was attributed to the size effect and the synergistic effect between steric hindrance and chargeNotably, the synergistic impact decreased with dye molecular weight, while greater membrane negative charge

Keywords： adipic acid     loose nanofiltration membrane     dye/salt selective separation     steric hindrance     charge effect    

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Title Author Date Type Operation

A 0.20–2.43 GHz fractional-

Wei Zou, Daming Ren, Xuecheng Zou,weizou@hust.edu.cn,damingren@hust.edu.cn,estxczou@hust.edu.cn

Journal Article

Computer-Aided Design System for CP Single-Screw Compressor

SHEN Jing-feng, YAO Fu-sheng

Journal Article

Charge-carrier photogeneration and extraction dynamics of polymer solar cells probed by a transient photocurrentnearby the regime of the space charge-limited current

Boa Jin, Hyunmin Park, Yang Liu, Leijing Liu, Jongdeok An, Wenjing Tian, Chan Im

Journal Article

Elliptical lobe shape gerotor pump design to minimize wear

Mohammad Reza KARAMOOZ RAVARI

Journal Article

Extended two-fluid model applied to analysis of bubbly flow in multiphase rotodynamic pump impeller

Zhiyi YU, Guoyu WANG, Shuliang CAO

Journal Article

R&D of the ground-coupled heat pump technology in China

Nairen DIAO, Ping CUI, Junhong LIU, Zhaohong FANG,

Journal Article

Evaluation of the performance of a centralized ground-water heat pump system in cold climate region

Shilei LU,Zhe CAI,Li ZHANG,Yiran LI

Journal Article

Charge and separation characteristics of nanofiltration membrane embracing dissociated functional groups

Zhun MA,Meng WANG,Xueli GAO,Congjie GAO

Journal Article

A valveless piezoelectric pump with novel flow path design of function of rectification to improve energy

Journal Article

Absorption heat pump for waste heat reuse: current states and future development

Zhenyuan XU, Ruzhu WANG

Journal Article

Visible-light-driven heterostructured g-CN/Bi-TiO floating photocatalyst with enhanced charge carrier

Journal Article

Numerical simulation of charge stratifications to improve combustion and NO formation of lean-burn SI

Zhijun PENG ,

Journal Article

design of novel proton-pump inhibitors with reduced adverse effects

Xiaoyi Li, Hong Kang, Wensheng Liu, Sarita Singhal, Na Jiao, Yong Wang, Lixin Zhu, Ruixin Zhu

Journal Article

Efficiency characteristics of piezostack pump for linear actuators

Junwu KAN, Kehong TANG, Chenghui SHAO, Guoren ZHU, Taijiang PENG,

Journal Article

membranes using SPES as a hydrophilic polymer for the effective removal of dyes via steric hindrance and charge

Journal Article