We present a theoretical study of the magnetic properties of the lanthanum copper manganate double perovskite La2CuMnO6 ceramic,using Monte Carlo simulations.We analyze and discuss the ground state phase diagrams in d...We present a theoretical study of the magnetic properties of the lanthanum copper manganate double perovskite La2CuMnO6 ceramic,using Monte Carlo simulations.We analyze and discuss the ground state phase diagrams in different planes to show the effect of every physical parameter.Based on the Monte Carlo simulations,which combine Metropolis algorithm and Ising model,we explore the thermal behavior of the total magnetization and susceptibility.We also present and discuss the influence of physical parameters such as the external magnetic field,the exchange coupling interactions between magnetic atoms,and the exchange magnetic field on the magnetization of the system.Moreover,the critical temperature of the system is about Tc=70 K,in agreement with the experimental value.Finally,the hysteresis loops of La2CuMnO6 are discussed.展开更多
Chocolate is widely enjoyed in many sweets and foods all over the world. In cocoa butter, fatty acids combine together and give cocoa butter 6 different types of crystals: γ, α, β’(III), β’(IV), β(V) and β(VI)...Chocolate is widely enjoyed in many sweets and foods all over the world. In cocoa butter, fatty acids combine together and give cocoa butter 6 different types of crystals: γ, α, β’(III), β’(IV), β(V) and β(VI). In the industry, the β(V) form that is required, is metastable and gives chocolate its marketable properties. The β(VI) form is also stable but not desirable, because of fat bloom. The objective of this study is to characterize these polytypes by terahertz(THz) spectroscopy. THz spectroscopy is expected to be a new tool in food industry, as THz energy corresponds to collective molecular macro-vibrations. Two chocolates from different factories were inspected with optical microscope, X-ray diffraction (XRD) and THz spectroscopy. Optical microscope showed different surface aspects, XRD showed the same species in the two brands and THz spectroscopy showed different features. These differences may be due to fatty acids combination of chocolate.展开更多
The polyphenols of ten Moroccan apricot clones were analyzed using a Thioacidolysis-UFLC combination technology in order to evaluate their evolution pattern and their contribution to antioxidant activity during ripeni...The polyphenols of ten Moroccan apricot clones were analyzed using a Thioacidolysis-UFLC combination technology in order to evaluate their evolution pattern and their contribution to antioxidant activity during ripening.Procyanidins were the predominant polyphenol class with concentrations varied from 30 to 1091 mg kg1 in M1(commercial stage)and from 398 to 1411 mg kg1 in M2(consumption stage).Procyanidins with catechins,the two classes constitute the principal contributors to antioxidant activity of studied apricots.The impact of ripening was very limited compared to genotype,especially for size and skin color of the fruit.The Thioacidolysis-UFLC technology highlighted the contribution of procyanidins to antioxidant activity of apricot and established a typology based on the clone skin color.Indeed,dark red and orange apricots had higher phenolic contents and antioxidant activities than clear ones.This indicates the importance of fruit color to predict apricot bioactive compounds and the crucial role of phenolic compounds in the antioxidant activity of these fruits.展开更多
Due to its multiple features,including the ability to orchestrate remote communication between different tissues,the exosomes are the extracellular vesicles arousing the highest interest in the scientific community.Th...Due to its multiple features,including the ability to orchestrate remote communication between different tissues,the exosomes are the extracellular vesicles arousing the highest interest in the scientific community.Their size,established as an average of 30-150 nm,allows them to be easily uptaken by most cells.According to the type of cells-derived exosomes,they may carry specific biomolecular cargoes used to reprogram the cells they are interacting with.In certain circumstances,exosomes stimulate the immune response by facilitating or amplifying the release of foreign antigens-killing cells,inflammatory factors,or antibodies(immune activation).Meanwhile,in other cases,they are efficiently used by malignant elements such as cancer cells to mislead the immune recognition mechanism,carrying and transferring their cancerous cargoes to distant healthy cells,thus contributing to antigenic invasion(immune suppression).Exosome dichotomic patterns upon immune system regulation present broad advantages in immunotherapy.Its perfect comprehension,from its early biogenesis to its specific interaction with recipient cells,will promote a significant enhancement of immunotherapy employing molecular biology,nanomedicine,and nanotechnology.展开更多
We present HiLLS(High Level Language for System Specification),a graphical formalism that allows to specify Discrete Event System(DES)models for analysis using methodologies like simulation,formal methods and enactmen...We present HiLLS(High Level Language for System Specification),a graphical formalism that allows to specify Discrete Event System(DES)models for analysis using methodologies like simulation,formal methods and enactment.HiLLS’syntax is built from the integration of concepts from System Theory and Software Engineering aided by simple concrete notations to describe the structural and behavioral aspects of DESs.This paper provides the syntax of HiLLS and its simulation semantics which is based on the Discrete Event System Specification(DEVS)formalism.From DEVS-based Modeling and Simulation(M&S)perspective,HiLLS is a platform-independent visual language with generic expressions that can serve as a front-end for most existing DEVS-based simulation environments with the aid of Model-Driven Engineering(MDE)techniques.It also suggests ways to fill some gaps in existing DEVS-based visual formalisms that inhibit complete specification of the behavior of complex DESs.We provide a case study to illustrate the core features of the language.展开更多
The productivity of a gas well declines over its production life as cannot cover economic policies.To overcome such problems,the production performance of gas wells should be predicted by applying reliable methods to ...The productivity of a gas well declines over its production life as cannot cover economic policies.To overcome such problems,the production performance of gas wells should be predicted by applying reliable methods to analyse the decline trend.Therefore,reliable models are developed in this study on the basis of powerful artificial intelligence techniques viz.the artificial neural network(ANN)modelling strategy,least square support vector machine(LSSVM)approach,adaptive neurofuzzy inference system(ANFIS),and decision tree(DT)method for the prediction of cumulative gas production as well as initial decline rate multiplied by time as a function of the Arps'decline curve exponent and ratio of initial gas flow rate over total gas flow rate.It was concluded that the results obtained based on the models developed in current study are in satisfactory agreement with the actual gas well production data.Furthermore,the results of comparative study performed demonstrates that the LSSVM strategy is superior to the other models investigated for the prediction of both cumulative gas production,and initial decline rate multiplied by time.展开更多
The multi-analysis modeling of a complex system is the act of building a family of models which allows to cover a large spectrum of analysis methods(such as simulation,formal methods,enactment,...)that can be performe...The multi-analysis modeling of a complex system is the act of building a family of models which allows to cover a large spectrum of analysis methods(such as simulation,formal methods,enactment,...)that can be performed to derive various properties of this system.The High-Level Language for Systems Specification(HiLLS)has recently been introduced as a graphical language for discrete event simulation,with potential for other types of analysis,like enactment for rapid system prototyping.HiLLS defines an automata language that also opens the way to formal verification.This paper provides the building blocks for such a feature.That way,a unique model can be used not only to perform both simulation and enactment experiments but also to allow the logical analysis of properties without running any experiment.Therefore,it saves from the effort of building three different analysis-specific models and the need to align them semantically.展开更多
文摘We present a theoretical study of the magnetic properties of the lanthanum copper manganate double perovskite La2CuMnO6 ceramic,using Monte Carlo simulations.We analyze and discuss the ground state phase diagrams in different planes to show the effect of every physical parameter.Based on the Monte Carlo simulations,which combine Metropolis algorithm and Ising model,we explore the thermal behavior of the total magnetization and susceptibility.We also present and discuss the influence of physical parameters such as the external magnetic field,the exchange coupling interactions between magnetic atoms,and the exchange magnetic field on the magnetization of the system.Moreover,the critical temperature of the system is about Tc=70 K,in agreement with the experimental value.Finally,the hysteresis loops of La2CuMnO6 are discussed.
文摘Chocolate is widely enjoyed in many sweets and foods all over the world. In cocoa butter, fatty acids combine together and give cocoa butter 6 different types of crystals: γ, α, β’(III), β’(IV), β(V) and β(VI). In the industry, the β(V) form that is required, is metastable and gives chocolate its marketable properties. The β(VI) form is also stable but not desirable, because of fat bloom. The objective of this study is to characterize these polytypes by terahertz(THz) spectroscopy. THz spectroscopy is expected to be a new tool in food industry, as THz energy corresponds to collective molecular macro-vibrations. Two chocolates from different factories were inspected with optical microscope, X-ray diffraction (XRD) and THz spectroscopy. Optical microscope showed different surface aspects, XRD showed the same species in the two brands and THz spectroscopy showed different features. These differences may be due to fatty acids combination of chocolate.
基金acknowledge Dr.Mohamed Najib Alfeddy for collecting samples from the collection of experimental orchard of the Regional Center for Agricultural Research in Marrakech,Morocco(30◦21_08.4__N 9◦30_29.0__W).
文摘The polyphenols of ten Moroccan apricot clones were analyzed using a Thioacidolysis-UFLC combination technology in order to evaluate their evolution pattern and their contribution to antioxidant activity during ripening.Procyanidins were the predominant polyphenol class with concentrations varied from 30 to 1091 mg kg1 in M1(commercial stage)and from 398 to 1411 mg kg1 in M2(consumption stage).Procyanidins with catechins,the two classes constitute the principal contributors to antioxidant activity of studied apricots.The impact of ripening was very limited compared to genotype,especially for size and skin color of the fruit.The Thioacidolysis-UFLC technology highlighted the contribution of procyanidins to antioxidant activity of apricot and established a typology based on the clone skin color.Indeed,dark red and orange apricots had higher phenolic contents and antioxidant activities than clear ones.This indicates the importance of fruit color to predict apricot bioactive compounds and the crucial role of phenolic compounds in the antioxidant activity of these fruits.
基金supported by the National Key Research&Development Program of China(2021YFA1201000,2021YFC2302400,2021YFE0106900)the National Natural Science Foundation of China(32171394)+3 种基金the Fundamental Research Funds for the Central Universities(2022CX01013)Beijing Nova Program(Interdisciplinary Cooperation Project)from Beijing Municipal Science&Technology Commission(20220484207)the project from China Bio-Medicine Park(Daxing Biomedical Industrial Base of Zhongguancun Science and Technology Park)the project from Suzhou Biomedical Industrial Park(BioBAY).
文摘Due to its multiple features,including the ability to orchestrate remote communication between different tissues,the exosomes are the extracellular vesicles arousing the highest interest in the scientific community.Their size,established as an average of 30-150 nm,allows them to be easily uptaken by most cells.According to the type of cells-derived exosomes,they may carry specific biomolecular cargoes used to reprogram the cells they are interacting with.In certain circumstances,exosomes stimulate the immune response by facilitating or amplifying the release of foreign antigens-killing cells,inflammatory factors,or antibodies(immune activation).Meanwhile,in other cases,they are efficiently used by malignant elements such as cancer cells to mislead the immune recognition mechanism,carrying and transferring their cancerous cargoes to distant healthy cells,thus contributing to antigenic invasion(immune suppression).Exosome dichotomic patterns upon immune system regulation present broad advantages in immunotherapy.Its perfect comprehension,from its early biogenesis to its specific interaction with recipient cells,will promote a significant enhancement of immunotherapy employing molecular biology,nanomedicine,and nanotechnology.
文摘We present HiLLS(High Level Language for System Specification),a graphical formalism that allows to specify Discrete Event System(DES)models for analysis using methodologies like simulation,formal methods and enactment.HiLLS’syntax is built from the integration of concepts from System Theory and Software Engineering aided by simple concrete notations to describe the structural and behavioral aspects of DESs.This paper provides the syntax of HiLLS and its simulation semantics which is based on the Discrete Event System Specification(DEVS)formalism.From DEVS-based Modeling and Simulation(M&S)perspective,HiLLS is a platform-independent visual language with generic expressions that can serve as a front-end for most existing DEVS-based simulation environments with the aid of Model-Driven Engineering(MDE)techniques.It also suggests ways to fill some gaps in existing DEVS-based visual formalisms that inhibit complete specification of the behavior of complex DESs.We provide a case study to illustrate the core features of the language.
文摘The productivity of a gas well declines over its production life as cannot cover economic policies.To overcome such problems,the production performance of gas wells should be predicted by applying reliable methods to analyse the decline trend.Therefore,reliable models are developed in this study on the basis of powerful artificial intelligence techniques viz.the artificial neural network(ANN)modelling strategy,least square support vector machine(LSSVM)approach,adaptive neurofuzzy inference system(ANFIS),and decision tree(DT)method for the prediction of cumulative gas production as well as initial decline rate multiplied by time as a function of the Arps'decline curve exponent and ratio of initial gas flow rate over total gas flow rate.It was concluded that the results obtained based on the models developed in current study are in satisfactory agreement with the actual gas well production data.Furthermore,the results of comparative study performed demonstrates that the LSSVM strategy is superior to the other models investigated for the prediction of both cumulative gas production,and initial decline rate multiplied by time.
基金This work has been supported by the 2017 PAMI Travel Grantthe 2019 AUST/AfDB Special Grant.
文摘The multi-analysis modeling of a complex system is the act of building a family of models which allows to cover a large spectrum of analysis methods(such as simulation,formal methods,enactment,...)that can be performed to derive various properties of this system.The High-Level Language for Systems Specification(HiLLS)has recently been introduced as a graphical language for discrete event simulation,with potential for other types of analysis,like enactment for rapid system prototyping.HiLLS defines an automata language that also opens the way to formal verification.This paper provides the building blocks for such a feature.That way,a unique model can be used not only to perform both simulation and enactment experiments but also to allow the logical analysis of properties without running any experiment.Therefore,it saves from the effort of building three different analysis-specific models and the need to align them semantically.