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Influence of initial check, information exchange, final accuracy check, reaction information nursing on the psychology of elderly with lung cancer 被引量:2
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作者 Cui Jiang Jing Ma +1 位作者 Wen He Hai-Ying Zhang 《World Journal of Clinical Cases》 SCIE 2024年第4期737-745,共9页
BACKGROUND As one of the fatal diseases with high incidence,lung cancer has seriously endangered public health and safety.Elderly patients usually have poor self-care and are more likely to show a series of psychologi... BACKGROUND As one of the fatal diseases with high incidence,lung cancer has seriously endangered public health and safety.Elderly patients usually have poor self-care and are more likely to show a series of psychological problems.AIM To investigate the effectiveness of the initial check,information exchange,final accuracy check,reaction(IIFAR)information care model on the mental health status of elderly patients with lung cancer.METHODS This study is a single-centre study.We randomly recruited 60 elderly patients with lung cancer who attended our hospital from January 2021 to January 2022.These elderly patients with lung cancer were randomly divided into two groups,with the control group taking the conventional propaganda and education and the observation group taking the IIFAR information care model based on the conventional care protocol.The differences in psychological distress,anxiety and depression,life quality,fatigue,and the locus of control in psychology were compared between these two groups,and the causes of psychological distress were analyzed.RESULTS After the intervention,Distress Thermometer,Hospital Anxiety and Depression Scale(HADS)for anxiety and the HADS for depression,Revised Piper’s Fatigue Scale,and Chance Health Locus of Control scores were lower in the observation group compared to the pre-intervention period in the same group and were significantly lower in the observation group compared to those of the control group(P<0.05).After the intervention,Quality of Life Questionnaire Core 30(QLQ-C30),Internal Health Locus of Control,and Powerful Others Health Locus of Control scores were significantly higher in the observation and the control groups compared to the pre-intervention period in their same group,and QLQ-C30 scores were significantly higher in the observation group compared to those of the control group(P<0.05).CONCLUSION The IIFAR information care model can help elderly patients with lung cancer by reducing their anxiety and depression,psychological distress,and fatigue,improving their tendencies on the locus of control in psychology,and enhancing their life qualities. 展开更多
关键词 Initial check information exchange final accuracy check reaction information care model Lung cancer Mental health
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Vector Meson Electro-production in Pomeron Exchange Model 被引量:1
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作者 MAWei-Xing LIUBao-Rong +3 位作者 ZHOULi-Juan TANZhen-Qiang HEXiao-Rong GUYun-Ting 《Communications in Theoretical Physics》 SCIE CAS CSCD 2005年第6期1068-1074,共7页
Based on Pomeron exchange model, elastic production of vector meson in electro-proton interaction is investigated with both linear and non-linear Pomeron trajectory. A numerical calculation for J/psi production is per... Based on Pomeron exchange model, elastic production of vector meson in electro-proton interaction is investigated with both linear and non-linear Pomeron trajectory. A numerical calculation for J/psi production is performed. The effect of the energy scale so and photon virtuality Q(2) on differential cross section are also predicted. A good agreement with experimental data is obtained. Our conclusions are that the Pomeron exchange model is a successful description of J/psi electro-production, the dependence of the differential cross sections on Q2 is negligible, the linear trajectory is a good approximation to non-linearity of the Pomeron trajectory, and the value of the energy scale parameter so is dependent on the momentum transfer, namely its effect is moderate at low momentum transfer but it causes no difference at high momentum transfer vertical bar t vertical bar >= 1.25 GeV2. 展开更多
关键词 vector meson electro-production diffractive process Pomeron exchange model
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Step-wise synthesis of work exchange networks involving heat integration based on the transshipment model 被引量:7
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作者 Yu Zhuang Linlin Liu +1 位作者 Qilei Liu Jian Du 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2017年第8期1052-1060,共9页
Due to the deterioration of serious energy dilemma,energy-conservation and emission–reduction have been the strategic target in the past decades,thus people have identified the vital importance of higher energy effic... Due to the deterioration of serious energy dilemma,energy-conservation and emission–reduction have been the strategic target in the past decades,thus people have identified the vital importance of higher energy efficiency and the influence of lower carbon development.Since work exchange network is a significant part of energy recovery system,its optima design will have dramatically significant effect on energy consumption reduction in chemical process system.With an extension of the developed transshipment model in isothermal process,a novel step-wise methodology for synthesis of direct work exchange network(WEN)in adiabatic process involving heat integration is first proposed in this paper,where a nonlinear programming(NLP)model is formulated by regarding the minimum utility consumption as objective function and optimizing the initial WEN in accordance with the presented matching rules to get the optimized WEN configuration at first.Furthermore,we focus on the work exchange network synthesis with heat integration to attain the minimal total annual cost(TAC)with the introduction of heat-exchange equipment that is achieved by the following strategies in sequence:introducing heat-exchange equipment directly,adjusting the work quantity of the adjacent utility compressors or expanders,and approximating upper/lower pressure limits consequently to obtain considerable cost savings of expanders or compressors and work utility.Finally,a case taken from the literature is studied to illustrate the feasibility and effectiveness of the proposed method. 展开更多
关键词 Work exchange network Transshipment model Adiabatic process Trade-off between work and heat Economic analysis
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J/ψ and φ Electro-production in Pomeron Exchange Model
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作者 LIU Bao-Rong ZHOU Li-Juan +3 位作者 MA Wei-Xing TAN Zhen-Qiang GU Yun-Ting HE Xiao-Rong 《Communications in Theoretical Physics》 SCIE CAS CSCD 2007年第2X期326-330,共5页
Based on Pomeron exchange model, J/ψ and φ production in electro-proton interaction are investigated with both linear and non-linear Pomeron trajectory. The experimental differential cross sections measured as a fun... Based on Pomeron exchange model, J/ψ and φ production in electro-proton interaction are investigated with both linear and non-linear Pomeron trajectory. The experimental differential cross sections measured as a function of the kinematic variable Q^2,W and t are reproduced successfully in the model. Our conclusions are that the Pomeron exchange model is a successful description of J/ψ and φ electro-productions on the proton, and that the linear trajectory is a good approximation to non-linearity of the Pomeron trajectory. 展开更多
关键词 vector meson electro-production diffractive process Pomeron exchange model
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φElectro-production in Pomeron Exchange Model
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作者 MA Wei-Xing LIU Bao-Rong +3 位作者 ZHOU Li-Juan TAN Zhen-Qiang HE Xiao-Rong GU Yun-Ting 《Communications in Theoretical Physics》 SCIE CAS CSCD 2005年第2X期329-332,共4页
Based on the Pomeron exchange model, elastic production of φ meson in electron-proton interaction is investigated with both linear and non-linear Pomeron trajectories. The numerical calculations of the differential c... Based on the Pomeron exchange model, elastic production of φ meson in electron-proton interaction is investigated with both linear and non-linear Pomeron trajectories. The numerical calculations of the differential cross section for e + p → e' + p+ φ are performed. The theoretical predictions show that the dependence of the differentialcross section on virtual photon virtuality, Q2, is of moderation, the change of the energy scale parameter so causes moderate effect on the differential cross section, and the linear trajectory is a good approximation to non-linearity of the Pomeron trajectory, in particular, at small momentum transfer region | t |≤ 0.2 GeV2. 展开更多
关键词 φelectro-production Pomeron exchange model
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Monetary Model of Exchange Rate Determination: Evidence From the Czech Republic, Hungary, and Poland
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作者 Victor Shevchuk 《Journal of Modern Accounting and Auditing》 2014年第1期97-103,共7页
Using a monetary model of exchange rate determination that suggests a strong link between the nominal exchange rate and a set of monetary fundamentals, exchange rate dynamics for the Czech Republic, Hungary, and Polan... Using a monetary model of exchange rate determination that suggests a strong link between the nominal exchange rate and a set of monetary fundamentals, exchange rate dynamics for the Czech Republic, Hungary, and Poland is studied. As the cointegration relationship among exchange rate, output, and the monetary fundamentals (money supply and interest rate) is found, vector autoregressions (VAR)/vector error-correction (VEC) and two-stage least squares (2SLS) error-correction models are used in this context, since both approaches allow estimating short-run correlations between exchange rates and fundamentals while taking into account the existent long-run exchange rate constraints. Based on the quarterly data for the period of 1998-2012, it is found that for all countries, an increase in the money supply, domestic output slowdown, or stronger growth abroad are factors behind a nominal exchange rate depreciation, just as predicted by the monetary model of exchange rate. However, the effects of domestic-foreign interest rate differential are quite heterogeneous, being in line with theoretical predictions of a standard monetary model for Poland only. According to the decomposition of variance, money supply and interest rates account for 30%-46% of the exchange rate variation in the Czech Republic, from 10% to 14% in Hungary, and from 23% to 42% in Poland. 展开更多
关键词 monetary model of exchange rate the Czech Republic Hungary' Poland error-correction models
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Kinetic and thermodynamic studies of the esterification of acidified oil catalyzed by sulfonated cation exchange resin 被引量:8
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作者 Lingling Ma Ying Han +2 位作者 Kaian Sun Jie Lu Jincheng Ding 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2015年第4期456-462,共7页
This study describes the kinetics and thermodynamics of the esterification of acidified oil with methanol catalyzed by sulfonated cation exchange resins(SCER). The effects of the mass ratio of methanol to acidified ... This study describes the kinetics and thermodynamics of the esterification of acidified oil with methanol catalyzed by sulfonated cation exchange resins(SCER). The effects of the mass ratio of methanol to acidified oil,reaction temperature,and catalyst loading were studied to optimize the conditions for maximum conversion of free fatty acids(FFAs). The results showed that the optimal conversion rate of FFAs was 91.87% at the mass ratio of methanol to acidified oil of 2.5:1.0,reaction temperature of 65.0 °C,catalyst loading of 5.0 g and reaction time of 8.0 h. The external and internal mass transfer resistances were negligible based on the experimental results and a pseudo-homogeneous kinetic model was proposed for the esterification. The activation energy and thermodynamic parameters including G,S and H were determined. The conversion rates of FFAs obtained from the established model were in good agreement with the experimental data. 展开更多
关键词 Acidified oil Biodiesel Esterification Pseudo-homogeneous model Sulfonated cation exchange resin
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Multiferroic phase transitions in manganites RMnO_3:A two-orbital double exchange simulation 被引量:1
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作者 陶永梅 林林 +1 位作者 董帅 刘俊明 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第10期456-461,共6页
The semi-quantum two-orbital exchange model is used to investigate the effect of small rare-earth ion substitution on orthorhombic RMnO 3 with A-type antiferromagnetic order,using the Monte Carlo algorithm,exact diago... The semi-quantum two-orbital exchange model is used to investigate the effect of small rare-earth ion substitution on orthorhombic RMnO 3 with A-type antiferromagnetic order,using the Monte Carlo algorithm,exact diagonalization,and zero-temperature optimization approaches.It is revealed that the substitution results in a rich multiferroic phase diagram where the coexisting A-type antiferromagnetic phase and spiral spin phase,pure spiral spin phase,coexisting spiral spin phase,the E-type antiferromagnetic phase,and the pure E-type antiferromagnetic phase emerge in sequence.The multiferroic phase transitions modulate substantially the electric polarization,which is consistent qualitatively with recent experiments. 展开更多
关键词 multiferroic phase R-site doping two-orbital exchange model
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Definition of water exchange zone between the Bohai Sea and Yellow Sea and the effect of winter gale on it 被引量:3
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作者 SONG Jun GUO Junru +5 位作者 LI Jing MU Lin LIU Yulong WANG Guosong LI Yan LI Huan 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2017年第1期17-25,共9页
The marine dynamic environment of the Bohai Sea and the Yellow Sea in the winter of 2006 is simulated by the Regional Ocean Modelling System(ROMS) marine numerical model. Using the simulated temperature and salinity... The marine dynamic environment of the Bohai Sea and the Yellow Sea in the winter of 2006 is simulated by the Regional Ocean Modelling System(ROMS) marine numerical model. Using the simulated temperature and salinity, the water exchange zone between the Bohai Sea and Yellow Sea is defined through the Spectral Mixture Model(SMM). The influence of winter gales on the water exchange is also discussed. It is found that the Yellow Sea water masses in winter are distributed in a "tongue" shape in the Bohai Strait region, the water exchange zone presents a zonal distribution along the margin of the "tongue", with a tendency of running from northwest to southeast, and the water exchange is intensified at the tip of the "tongue". Besides, the coastal area in the northernmost Yellow Sea does not participate in the water exchange between the Bohai Sea and Yellow Sea. The result shows that the winter gale events play a role in enhancing the water exchange. It is specifically shown by the facts: the Yellow Sea warm current is enhanced to intrude the Bohai Sea by the gale process; the water exchange zone extends into the Bohai Sea; the water exchange belt in the southern part becomes wider; the mixture zone of river runoff with the Bohai Sea water upon its entry is enlarged and shifts northwards. Within two days after the gale process, the exchange zone retreats toward the Yellow Sea and the exchange zone resulted from the Huanghe River(Yellow River) runoff also shrinks back shoreward. 展开更多
关键词 Bohai Strait winter gale spectral clustering Spectral Mixture model water mass analysis water exchange
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A Novel Formal Theory for Security Protocol Analysis of Denial of Service Based on Extended Strand Space Model
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作者 JIANG Rui 《China Communications》 SCIE CSCD 2010年第4期23-28,共6页
Denial of Service Distributed Denial of Service (DOS) attack, especially (DDoS) attack, is one of the greatest threats to Internet. Much research has been done for it by now, however, it is always concentrated in ... Denial of Service Distributed Denial of Service (DOS) attack, especially (DDoS) attack, is one of the greatest threats to Internet. Much research has been done for it by now, however, it is always concentrated in the behaviors of the network and can not deal with the problem exactly. In this paper, we start from the security of the protocol, then we propose a novel theory for security protocol analysis of Denial of Service in order to deal with the DoS attack. We first introduce the conception of weighted graph to extend the strand space model, then we extend the penetrator model and define the goal of anti-DoS attack through the conception of the DoS-stop protocol, finally we propose two kinds of DoS test model and erect the novel formal theory for security protocol analysis of Denial of Service. Our new formal theory is applied in two example protocols. It is proved that the Internet key exchange (IKE) easily suffers from the DoS attacks, and the efficient DoS- resistant secure key exchange protocol (JFK) is resistant against DoS attack for the server, respectively. 展开更多
关键词 Denial of Service Security Protocol Analysis Formal Theory Strand Space model Internet Key exchange
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Vehicles PEMFC Power System Mathematical Model for Integrated Design
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作者 Vincenzo Di Dio Diego La Cascia Rosario Liga Rosario Miceli 《Journal of Energy and Power Engineering》 2013年第4期746-751,共6页
In this paper, the mathematical dynamical model of a PEMFC (proton exchange membrane fuel cells) stack, integrated with an automotive synchronous electrical power drive, developed in Matlab environment, is shown. Lo... In this paper, the mathematical dynamical model of a PEMFC (proton exchange membrane fuel cells) stack, integrated with an automotive synchronous electrical power drive, developed in Matlab environment, is shown. Lots of simulations have been executed in many load conditions. In this paper, the load conditions regarding an electrical vehicle for disabled people is reported. The innovation in this field concerns the integration, in the PEMFC stack mathematical dynamic model, of a synchronous electrical power drive for automotive purposes. Goal of the simulator design has been to create an useful tool which is able to evaluate the behaviour of the whole system so as to optimize the components choose. As regards the simulations with a synchronous electrical power drive, the complete mathematical model allows to evaluate the PEMFC stack performances and electrochemical efficiency. 展开更多
关键词 Proton exchange membrane fuel cells mathematical model automotive synchronous electrical power drive test cycle.
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Middle Cretaceous pCO_2 Variation in Yumen, Gansu Province and its Response to the Climate Events 被引量:5
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作者 LEI Xiangtong DU Zhen +2 位作者 DU Baoxia ZHANG Mingzhen SUN Bainian 《Acta Geologica Sinica(English Edition)》 CAS CSCD 2018年第2期801-813,共13页
The palaeo-atmospheric CO2 concentration (pCOz) variation in the Yumen, Gansu Province during the middle Cretaceous has been reconstructed using the newly established plant photosynthetic gas exchange mechanistic mo... The palaeo-atmospheric CO2 concentration (pCOz) variation in the Yumen, Gansu Province during the middle Cretaceous has been reconstructed using the newly established plant photosynthetic gas exchange mechanistic model, and the results show that the pCO2 values are in the range of about 550 -808 ppmv. The present pCO2 values are higher than the pCO2 results (531-641 ppmv) of the previous study according to the Recent standardization of the stomatal ratio method, and much lower than the pCO2 results (882-1060 ppmv) according to the Carboniferous standardization of the stomatal ratio method. The present pCOz variation is not only within the error range of GEOCARB II and GEOCARB Ill but also is similar to the reconstructed results based on the biochemistry and carbon isotope models. Besides, the present Brachyphyllum specimens were collected from four consecutive horizons of the upper Zhonggou Formation of the Hanxia Section, and the reconstructed pCO2 exhibits the reconstructed pCO2 exhibits a decline trend during the late Aptian to early Albian. This decline variation is probably associated with the Oceanic Anoxic Events (OAElb) and the Cold snap event. With the combination of pCO2 during the Albian to Cenomanian recovered by the plant photosynthetic gas exchange mechanistic model, the pCO2 showed a prominent increase during the late Aptian to early Cenominian, which indicates a response to the greenhouse warming during the middle Cretaceous. Therefore, the mechanical model of the plant photosynthetic gas exchange shows a relatively strong accuracy in the reconstruction of thepCO2 and can reflect a strong relation between the atmospheric CO2 concentrations and climatic events. 展开更多
关键词 PCO2 greenhouse climate plant photosynthetic gas exchange mechanical model OAElb Cold snap
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3D numerical simulation of boreholes for gas drainage based on the pore–fracture dual media 被引量:5
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作者 Wei Jianping Li Bo +1 位作者 Wang Kai Sun Donghui 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2016年第4期739-744,共6页
A gas migration controlling equation was formulated based on the characteristics of the dual pore–fracture media of coal mass and in consideration of the matrix exchange between pores and fractures.A model of permeab... A gas migration controlling equation was formulated based on the characteristics of the dual pore–fracture media of coal mass and in consideration of the matrix exchange between pores and fractures.A model of permeability dynamic evolution was established by analyzing the variation in effective stress during gas drainage and the action mechanism of the effect of coal matrix desorption on porosity and fracture in the coal body.A coupling model can then be obtained to characterize gas compressibility and coal deformability under the gas–solid coupling of loading coal.In addition,a 3D model of boreholes was established and solved for gas drainage based on the relevant physical parameters of real mines.The comparison and analysis results for the law of gas migration and the evolution of coal body permeability around the boreholes before and after gas extraction between the dual media and the single-seepage field models can provide a theoretical basis for further research on the action mechanism of gas drainage. 展开更多
关键词 Pore-fracture Matrix exchange Coupling model Numerical simulation Gas drainage
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Thick exchange layer evaporation model with natural convection effect and evaporation experimental study for multicomponent droplet 被引量:1
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作者 Fang WANG Xiang GAO +2 位作者 Yangchun XIAO Zhaoyang WU Jie JIN 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2020年第7期1903-1918,共16页
In order to investigate the high-temperature evaporation characteristics of multicomponent liquid fuel,three kinds of blended fuel:n-heptane/n-decane/RP-3 aviation kerosene-ethanol were experimentally studied with and... In order to investigate the high-temperature evaporation characteristics of multicomponent liquid fuel,three kinds of blended fuel:n-heptane/n-decane/RP-3 aviation kerosene-ethanol were experimentally studied with and without forced convection.Further,based on zerodiffusion and infinite diffusion concept,this study expanded Thick Exchange Layer evaporation model with Natural Convection effect(NC-TEL)to multicomponent liquid fuels.The experimental results show that the droplet evaporation rate increases significantly with the increase of ambient temperature.Higher temperature leads to more significant relationships between the composition ratio and the evaporation rate.The effect of forced convection is not obviously under the circumstance in this paper.Then,the evaporation models were validated by experimental data.In general,the new NC-TEL model behaves better than the Ranz-Marshall(R-M)model,and the prediction accuracy at high temperature is improved by 8%to 35%.In lower temperature conditions,the prediction of zero-diffusion NC-TEL model is better than the infinite diffusion NC-TEL model.In high-temperature conditions,for n-heptane-ethanol droplet,the predictions of NC-TEL model are accurate,but for n-decane/RP-3 aviation kerosene-ethanol,the predictions are lower than experimental results.This may be caused by the micro-explosion phenomenon and the Marangoni phenomenon. 展开更多
关键词 DROPLET Evaporation rate Multicomponent fuel evaporation model Natural convection Suspended droplet experiment Thick exchange layer model
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Removal of perfluorinated surfactants from wastewater by adsorption and ion exchange--Influence of material properties,sorption mechanism and modeling 被引量:6
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作者 Falk Schuricht Ekaterina S.Borovinskaya Wladimir Reschetilowski 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2017年第4期160-170,共11页
Perfluorooctane sulfonate(PFOS) has attracted increasing concern in recent years due to its world-wide distribution, persistence, bioaccumulation and potential toxicity. The influence of sorbent properties on the ad... Perfluorooctane sulfonate(PFOS) has attracted increasing concern in recent years due to its world-wide distribution, persistence, bioaccumulation and potential toxicity. The influence of sorbent properties on the adsorptive elimination of PFOS from wastewater by activated carbons, polymer adsorbents and anion exchange resins was investigated with regard to their isotherms and kinetics. The batch and column tests were combined with physicochemical characterization methods, e.g., N2 physisorption, mercury porosimetry, infrared spectroscopy, differential scanning calorimetry, titrations, as well as modeling. Sorption kinetics was successfully modelled applying the linear driving force(LDF) approach for surface diffusion after introducing a load dependency of the mass transfer coefficient βs.The big difference in the initial mass transfer coefficient βs,0, when non-functionalized adsorbents and ion-exchange resins are compared, suggests that the presence of functional groups impedes the intraparticle mass transport. The more functional groups a resin possesses and the longer the alkyl moieties are the bigger is the decrease in sorption rate.But the selectivity for PFOS sorption is increasing when the character of the functional groups becomes more hydrophobic. Accordingly, ion exchange and hydrophobic interaction were found to be involved in the sorption processes on resins, while PFOS is only physisorptively bound to activated carbons and polymer adsorbents. In agreement with the different adsorption mechanisms, resins possess higher total sorption capacities than adsorbents. Hence, the latter ones are rendered more effective in PFOS elimination at concentrations in the low μg/L range, due to a less pronounced convex curvature of the sorption isotherm in this concentration range. 展开更多
关键词 PFOS Activated carbon Anion exchange resin Sorption kinetics modeling Sorption isotherm Selectivity of sorption
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XML-based Data Processing in Network Supported Collaborative Design 被引量:2
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作者 Qi Wang Zhong-Wei Ren Zhong-Feng Guo 《International Journal of Automation and computing》 EI 2010年第3期330-335,共6页
In the course of network supported collaborative design, the data processing plays a very vital role. Much effort has been spent in this area, and many kinds of approaches have been proposed. Based on the correlative ... In the course of network supported collaborative design, the data processing plays a very vital role. Much effort has been spent in this area, and many kinds of approaches have been proposed. Based on the correlative materials, this paper presents extensible markup language (XML) based strategy for several important problems of data processing in network supported collaborative design, such as the representation of standard for the exchange of product model data (STEP) with XML in the product information expression and the management of XML documents using relational database. The paper gives a detailed exposition on how to clarify the mapping between XML structure and the relationship database structure and how XML-QL queries can be translated into structured query language (SQL) queries. Finally, the structure of data processing system based on XML is presented. 展开更多
关键词 Extensible markup language (XML) network supported collaborative design standard for the exchange of product model data (STEP) data analysis data processing relational database
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A new artificial bee swarm algorithm for optimization of proton exchange membrane fuel cell model parameters 被引量:1
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作者 Alireza ASKARZADEH Alireza REZAZADEH 《Journal of Zhejiang University-Science C(Computers and Electronics)》 SCIE EI 2011年第8期638-646,共9页
An appropriate mathematical model can help researchers to simulate,evaluate,and control a proton exchange membrane fuel cell (PEMFC) stack system.Because a PEMFC is a nonlinear and strongly coupled system,many assumpt... An appropriate mathematical model can help researchers to simulate,evaluate,and control a proton exchange membrane fuel cell (PEMFC) stack system.Because a PEMFC is a nonlinear and strongly coupled system,many assumptions and approximations are considered during modeling.Therefore,some differences are found between model results and the real performance of PEMFCs.To increase the precision of the models so that they can describe better the actual performance,opti-mization of PEMFC model parameters is essential.In this paper,an artificial bee swarm optimization algorithm,called ABSO,is proposed for optimizing the parameters of a steady-state PEMFC stack model suitable for electrical engineering applications.For studying the usefulness of the proposed algorithm,ABSO-based results are compared with the results from a genetic algo-rithm (GA) and particle swarm optimization (PSO).The results show that the ABSO algorithm outperforms the other algorithms. 展开更多
关键词 Proton exchange membrane fuel cell stack model Parameter optimization Artificial bee swarm optimization algorithm
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Resonance properties from a coupled channel meson exchange model
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作者 M. Dring C. Hanhart +2 位作者 黄飞 S. Krewald U.-G. Meiβner 《Chinese Physics C》 SCIE CAS CSCD 2009年第12期1273-1278,共6页
In this talk, I present the results on the pole structure of pion-nucleon scattering in an analytic model based on meson exchange. The analytic properties of scattering amplitudes provide important information. Beside... In this talk, I present the results on the pole structure of pion-nucleon scattering in an analytic model based on meson exchange. The analytic properties of scattering amplitudes provide important information. Besides the cuts, the poles and zeros on the different Riemann sheets determine the global behavior of the amplitude on the physical axis. Pole positions and residues allow for a parameterization of resonances in a well-defined way, free of assumptions for the background and energy dependence of the resonance part. This is a necessary condition to relate resonance contributions in different reactions. 展开更多
关键词 pion-nucleon scattering meson exchange model analytic structure of the scattering amplitude
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Spillover Effect in the RMB Foreign Exchange Market:Based on VAR and DCC-MVGARCH Models
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作者 GAO Jieying LIAN Yonghui 《Frontiers of Business Research in China》 2022年第1期88-104,共17页
This paper analyzes the stability and marketization of the RMB exchange rate after China introduced the foreign exchange rate reform by linking the RMB exchange rate with the offshore and onshore markets on August 11,... This paper analyzes the stability and marketization of the RMB exchange rate after China introduced the foreign exchange rate reform by linking the RMB exchange rate with the offshore and onshore markets on August 11,2015(“8/11”).Under the framework of dynamic analysis,through Granger causality test,VAR model and DCC-MVGARCH model,the empirical analysis is conducted about the three market exchange rate linkages of CNY,NDF and CNH from May 2012 to December 2018.Then,the direction and degree of the linkage between the RMB’s offshore and onshore exchange rates before and after the“8/11”exchange rate reform are compared.The research results show that:(1)since the“8/11”exchange rate reform,the RMB exchange rate has become more flexible;(2)the price-determining power of the RMB exchange rate may be weakened,and policy adjustment should take effect;and(3)the prerequisites,under which the offshore market can play a role,are the development of the market itself.This paper proposes that:(1)the onshore and offshore markets should develop in a collaborative manner to further increase exchange rate elasticity and flexibility;(2)close attention should be paid to the relationship between the offshore and onshore markets,and policy determination and flexibility should be maintained;and(3)the offshore market should be improved and play a due role. 展开更多
关键词 "8/11"exchange rate reform offshore market onshore market exchange rate linkage VAR model DCC-MVGARCH model
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A Review on TSO-DSO Data Exchange,CIM Extensions and Interoperability Aspects
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作者 Arsim Bytyqi Siddhesh Gandhi +1 位作者 Eric Lambert Nejc Petrovic 《Journal of Modern Power Systems and Clean Energy》 SCIE EI CSCD 2022年第2期309-315,共7页
The exchange of information between transmission system operators(TSOs)and distribution system operators(DSOs)is a common practice.However,the evolution of the regulatory frameworks in Europe has increased the need fo... The exchange of information between transmission system operators(TSOs)and distribution system operators(DSOs)is a common practice.However,the evolution of the regulatory frameworks in Europe has increased the need for enhancing TSO-DSO data exchange and interoperability.This paper provides an overview of the TSO-DSO data exchanges and demonstrates the best practices using International Electrotechnical Commission(IEC)common information model(CIM),including the implementation of IEC common grid model exchange standard(CGMES),and discussion of the corresponding advantages,disadvantages,and challenges.Furthermore,this paper evaluates and reports the activities already carried out within European projects,with particular focus on TSO-DSO interoperability.Finally,this paper concludes the need for TSOs and DSOs to rely on standard-based solutions when performing TSO-DSO data exchange,which enables the efficient operation and development of the future power systems. 展开更多
关键词 Transmission system operator(TSO) distribution system operator(DSO) data exchange INTEROPERABILITY STANDARDIZATION common information model(CIM) common grid model exchange standard(CGMES)
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