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Статті в журналах з теми "Combined model of electrothermal processes"
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Smith, Brian, and Cristina Amon. "Simultaneous Electrothermal Test Method for Pyroelectric Microsensors." Journal of Electronic Packaging 129, no. 4 (August 19, 2007): 504–11. http://dx.doi.org/10.1115/1.2804101.
Повний текст джерелаАнотація:
Pyroelectric film materials, including polyvinylidene fluoride (PVDF) and its copolymers (e.g., P(VDF/trifluoroethylene)), are attractive candidates for low-cost infrared detection and imaging applications due to their compatibility with complementary metal-oxide semiconductor processing and inexpensive packaging requirements compared to semiconductor-based detectors. The pyroelectric coefficient (p) describes the material’s electric response to a change in sensor temperature and is the main contributor to the sensitivity and detectivity of the system. However, this value can vary greatly with film fabrication and poling processes, and its measurement is often highly coupled to the material’s thermal diffusivity. This paper describes a new approach to film characterization that combines the popular “3-omega” technique for thermal characterization with a modified version of the laser intensity modulation method for determining the film’s pyroelectric coefficient. The new method is capable of simultaneously measuring film conductivity, diffusivity, and pyroelectric coefficient. It could increase the accuracy of the pyroelectric measurements by providing in situ thermal data to the electrical model instead of relying on published values or thermal measurements of a different sample. We also present a fabrication process that can be used to pole and measure a variety of pyroelectric materials and a mathematical framework to study the thermal phenomena of the setup. The thermal model is used to highlight the methodology’s sensitivity to uncertainties in the geometric and material property values of the layers surrounding the pyroelectric film.
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Zhukov, Anatoly. "Strategic approaches of combined electrothermal processing of coal and carbonate mineral raw materials for obtainment of highly efficient synthetic energy carriers and non-fuel products." E3S Web of Conferences 56 (2018): 03017. http://dx.doi.org/10.1051/e3sconf/20185603017.
Повний текст джерелаАнотація:
Coal gasification and the production of gaseous fuels include three principal directions related to the production of fuel gas: 1) composition and heat capacity of the produced gas; 2) gas generator structures; 3) characteristic properties of the obtained alternative product - low CO content and gas toxicity, which allow making full use of this gas for domestic purposes. In industrial processes of coal conversion, the following combined technologies are used most often: - semi-coking + gasification of fixed ash (low-temperature coke); - semi-coking + hydrogenation of liquid product (tar); - gasification + synthesis of high molecular weight hydrocarbons from the produced SYN gas (СО+Н) (Fischer-Tropsch synthesis). The choice of the layout for obtaining SLF (synthetic liquid fuel) can be based on specific conditions, the cost and quality of coal, energy supply, market conditions. The products obtained in the process of gasification and hydrogenation of coals pollute the atmosphere much less than the coal burned in electrical power plants. When implementing the organizational and technological model of innovative production, the first stage includes the following combined approaches for the processing of mineral raw materials and new products: 1. processing of carbonic mineral raw materials: calcium carbide, carbon dioxide (in a gaseous, liquid or solid state); 2. acetylene, plant growth regulators (PGRs), plant protection products (TAKAR). The second stage includes fuel and non-fuel products: 1. synthetic ethyl alcohol (ethanol), antifreeze, ethylene glycol, dichloroethane, synthetic drying oils, acetone, etc .; 2. carbamide (urea), ammonia, nitrogen in gaseous and liquid states, methanol, gasoline, etc.
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Simeiko, K. V. "DEVELOPMENT AND VERIFICATION OF APPROPRIATENESS FOR MATHEMATICAL MODEL OF HEAT BALANCE OF ELECTROTHERMAL FLUIDIZED BED REACTOR." Thermophysics and Thermal Power Engineering 41, no. 2 (December 3, 2018): 35–40. http://dx.doi.org/10.31472/ttpe.2.2019.5.
Повний текст джерелаАнотація:
Supply of heat through combustion of organic fuel is impossible or economically unviable for the raw of high temperature processes due to it’s technological peculiarities. Some of these processes can be carried out in electrothermal fluidized bed reactors. Development of appropriate mathematical model for heat balance will allow prognostication of capacity needed to carry out specific process and improvement of electrothermal fluidized bed reactor.
During the development of mathematical model methods of heat-mass exchange theory were applied. Verification of appropriateness for mathematical model was carried out through comparison of experimental results and calculated values of the amount of heat needed to perform the process of methane pyrolysis in electrothermal fluidized bed and coefficient of thermal efficiency of electrothermal fluidized bed reactor.
Comparison with real thermochemical process in electrothermal fluidized bed reactor confirms the appropriateness of mathematical model. Average deviation of mathematical model of heat balance and coefficient of thermal efficiency from obtained experimental values is 5…7 % and 6…9 % respectively. Proposed mathematical model can be applied in design of electrothermal fluidized bed reactors.
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Vorobiov, L. I., R. V. Serhiienko, Z. A. Burova, and O. A. Nazarenko. "THERMAL PROCESSES MODELING IN QUASI-DIFFERENTIAL CALORIMETER." Industrial Heat Engineering 39, no. 4 (September 28, 2017): 81–87. http://dx.doi.org/10.31472/ihe.4.2017.12.
Повний текст джерелаАнотація:
The model of the quasi-differential calorimetric system based on the electrothermal analogy method is proposed. Using the model, the dynamics of average temperatures and heat flow changes in the system elements, the temperature perturbations and the technological parameters spread influences on the measurement error are researched.
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Górecki, Krzysztof, and Krzysztof Górski. "SPICE-Aided Compact Electrothermal Model of Impulse Transformers." Applied Sciences 11, no. 19 (September 24, 2021): 8894. http://dx.doi.org/10.3390/app11198894.
Повний текст джерелаАнотація:
This article proposes a new form of compact electrothermal model of impulse transformers. The proposed model is dedicated for use with SPICE and it is formulated in the network form. It simultaneously takes into account electrical, thermal, and magnetic phenomena occurring in the considered device. Nonlinearity of the core magnetization characteristics and nonlinearity of the heat transfer efficiency are taken into account in this model. The form of the proposed model is shown. Equations of the presented model are given. Experimental verification of the proposed model is performed for selected impulse transformers. Selected results of the performed investigations are presented.
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Batrashov, Andrey Borisovich, Alexander Viktorovich Paranin, and Konstantin Gennadyevich Shumakov. "Improvement of mathematical model for calculation of electrothermal processes in a DC catenary suspension." Transport of the Urals, no. 1 (2019): 90–96. http://dx.doi.org/10.20291/1815-9400-2019-1-90-96.
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Simeiko, K. V., and M. A. Sidorenko. "REACTOR’S THERMOPHYSICAL CHARACTERISTICS WITH AN ELECTROTHERMAL FLUIDIZED BED AND A COMBINED HEATING METHOD." Energy Technologies & Resource Saving, no. 3 (September 14, 2018): 59–66. http://dx.doi.org/10.33070/etars.3.2018.07.
Повний текст джерелаАнотація:
To improve the technological features and efficiency of high-temperature processing of the dielectric materials, a reactor design with the electrothermal fluidized bed with a combined heating method was developed at the Institute of Gas of the National Academy of Sciences of Ukraine. The main purpose of this reactor is the process of applying a pyrocarbon coating to quartz sand. The principle-technological scheme of the process is given. Subsequently, quartz sand coated with pyrolytic carbon will be used to produce pure silicon carbide. The authors developed a methodology for calculating the heat balance, which allows estimating the efficiency of the reactor. A method for calculating similarity criteria was chosen for the possibility of comparing the efficiency of heat exchange in a developed reactor with other machines for thermochemical processes. A description of the heat exchange between the fluidized bed and the electrode is proposed. After further experiments, it willbe possible to make final conclusions regarding improving the technological features andincreasing the efficiency of the process of applying a pyrolytic coating to quartz sand, andalso to check the adequacy of the calculation methods. After further experiments, it will bepossible to make final conclusions about improving the technological features and increasing the efficiency of the process of applying a pyrolytic coating to quartz sand. Also, it will allow to check the adequacy of the calculation methods. Bibl. 17, Fig. 2.
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Ge, Ji, Yuxiong Cao, Danyu Wu, YongBo Su, Zhi Jin, and Xinyu Liu. "A Combined Model With Electrothermal Coupling and Electromagnetic Simulation for Microwave Multifinger InP-Based DHBTs." IEEE Transactions on Electron Devices 59, no. 3 (March 2012): 673–79. http://dx.doi.org/10.1109/ted.2011.2177987.
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Gimsa, Jan, Marco Stubbe, and Ulrike Gimsa. "A short tutorial contribution to impedance and AC-electrokinetic characterization and manipulation of cells and media: Are electric methods more versatile than acoustic and laser methods?" Journal of Electrical Bioimpedance 5, no. 1 (August 8, 2019): 74–91. http://dx.doi.org/10.5617/jeb.557.
Повний текст джерелаАнотація:
Abstract Lab-on-chip systems (LOCs) can be used as in vitro systems for cell culture or manipulation in order to analyze or monitor physiological cell parameters. LOCs may combine microfluidic structures with integrated elements such as piezo-transducers, optical tweezers or electrodes for AC-electrokinetic cell and media manipulations. The wide frequency band (<1 kHz to >1 GHz) usable for AC-electrokinetic manipulation and characterization permits avoiding electrochemical electrode processes, undesired cell damage, and provides a choice between different polarization effects that permit a high electric contrast between the cells and the external medium as well as the differentiation between cellular subpopulations according to a variety of parameters. It has been shown that structural polarization effects do not only determine the impedance of cell suspensions and the force effects in AC-electrokinetics but can also be used for the manipulation of media with inhomogeneous temperature distributions. This manuscript considers the interrelations of the impedance of suspensions of cells and AC-electrokinetic single cell effects, such as electroorientation, electrodeformation, dielectrophoresis, electrorotation, and travelling wave (TW) dielectrophoresis. Unified models have allowed us to derive new characteristic equations for the impedance of a suspension of spherical cells, TW dielectrophoresis, and TW pumping. A critical review of the working principles of electro-osmotic, TW and electrothermal micropumps shows the superiority of the electrothermal pumps. Finally, examples are shown for LOC elements that can be produced as metallic structures on glass chips, which may form the bottom plate for self-sealing microfluidic systems. The structures can be used for cell characterization and manipulation but also to realize micropumps or sensors for pH, metabolites, cell-adhesion, etc.
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Xianhui, He, Gao Chunhua, and Wang Hui. "A Combined Model for Supervisory Control of Continuous Processes." Developments in Chemical Engineering and Mineral Processing 9, no. 1-2 (May 15, 2008): 33–40. http://dx.doi.org/10.1002/apj.5500090205.
Повний текст джерелаДисертації з теми "Combined model of electrothermal processes"
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Баранюк, Роман Андрійович. "Системи теплового захисту напівпровідникових перетворювачів електроенергії". Doctoral thesis, Київ, 2017. https://ela.kpi.ua/handle/123456789/21322.
Повний текст джерелаАнотація:
Дисертація присвячена розробці систем для забезпечення теплового захисту напівпровідникових перетворювачів електроенергії за рахунок суміщеного моделювання електромагнітних та теплових процесів в перетворювачах.
В роботі проведено аналіз сучасних методів розрахунку електромагнітних та теплових процесів, аналіз моделей ключових та пасивних компонентів. Показана доцільність використання моделей пасивних та активних компонентів перетворювачів параметри яких залежать від температури та електричних режимів роботи. Запропонована суміщена модель для розрахунку електротеплових процесів в перетворювачах з врахуванням швидкоплинності процесів та розділенням на системи рівнянь, що описують швидкі та повільні процеси. Запропоновані дві системи теплового захисту, які працюють за рахунок нормалізації перехідних електромагнітних процесів в колі перетворювача з врахуванням температури компонентів та перезапуску плавного пуску після зняття короткого замикання з програмним врахуванням температури компонентів.
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Yeo, Sungchil. "On estimation for a combined Markov and semi-Markov model with censoring /." The Ohio State University, 1987. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487586889187169.
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Lanzafame, Grazia Maria. "Understanding organic aerosol formation processes in atmosphere using molecular markers : a combined measurements-model approach." Electronic Thesis or Diss., Sorbonne université, 2019. http://www.theses.fr/2019SORUS519.
Повний текст джерелаАнотація:
L’aérosol organique (AO) constitue une large fraction des particules de l’air ambiant qui ont des impacts majeurs sur la qualité de l’air et le climat. Ses sources et processus de formation, surtout pour l’AO secondaire (AOS), sont encore méconnus induisant sa sous-estimation par les modèles de qualité de l’air. Ce travail a pour objectif d’améliorer la modélisation de l’AO en implémentant des émissions et processus de formation de marqueurs moléculaires organiques dans le modèle de chimie-transport CHIMERE. Il est basé sur la comparaison entre des sorties de modèle et de mesures réalisées en région parisienne (site périurbain du SIRTA, 25 km SO de Paris) en 2015 et sur 10 sites urbains en hiver 2014-2015. 25 marqueurs d’AOS biogénique et anthropique ont été quantifiés en phase particulaire et gazeuse et la formation de 10 a été simulée. L’évolution des concentrations en lévoglucosan (marqueur de la combustion de biomasse) a aussi été modélisée. Les résultats ont montré que les émissions de sources ou précurseurs (manquantes ou sous-estimées), les concentrations en radicaux (NO, HO2 et RO2) et le défaut de voies de formation, sont des paramètres clés pour la simulation des marqueurs d’AOS. Une faible dépendance à la T°C du partage gaz-particule a été observée alors que le partage hydrophile non idéal, souvent négligé, semble essentiel. Le lévoglucosan est bien modélisé, même si des sous-estimations existent dans certaines régions et une importante fraction gazeuse théorétique a été mise en évidence. La comparaison mesures/modèle de marqueurs moléculaires est un outil puissant pour évaluer les émissions, les processus physico-chimiques et à terme, estimer les sources d’AOOrganic aerosols (OA) account for a large fraction of ambient air particulate matter and have strong impacts on air quality and climate. As their sources and atmospheric formation processes, notably for secondary OA (SOA), are still not fully understood, their concentrations are often underestimated by air quality models. This work aimed at improving OA modelling by implementing specific organic molecular marker emissions and formation processes into the chemistry-transport model CHIMERE. It was based on the comparison of model outputs with measurements from field studies performed in the Paris region (suburban site of SIRTA, 25 km SW of Paris) over 2015 and 10 French urban locations in winter 2014-2015. 25 biogenic and anthropogenic SOA markers have been quantified in both, particulate and gas phases and the formation pathways of 10 have been developed and simulated using CHIMERE. The evolution of levoglucosan concentrations (biomass burning marker) has been also modeled. The results obtained showed that sources and precursor emissions (missing or underestimated), radical concentrations (NO, HO2 and RO2) and the lack of formation pathways, are key parameters for the simulation of SOA markers. Gas/particle partitioning seemed poorly linked to the T°C while the inclusion of hydrophilic non-ideal partitioning, usually neglected, seemed essential. Levoglucosan was well simulated, even if some underestimations existed in some regions. A significant theoretical gaseous fraction was also highlighted. The model/measurements comparison of molecular markers is a powerful tool to evaluate precursor emissions, physicochemical processes and in the end, to estimate OA sources
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Lin, Hong-Ren, and 林鴻仁. "A Study on Combined Numerical Analysis Model and experiment of Shape Rolling Processes." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/98626218085236947335.
Повний текст джерелаАнотація:
碩士國立台灣工業技術學院
機械工程技術研究所
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The object of this paper is to develop a simulation model to analyze thedeformation behavious of material under Shape Rolling. The Combined NumericalAnalysis Method is used in this study, which combined the merits of the FiniteElement Method( FEM) and the Slab Method. In dealing with the large deformationproblems, it has the merits of high accuracy and efficiency. Besides,under theassumption of the roll is a rigid body,this model can effectively analyzed thethree dimensional steady-state deformation of the materials under rolling. The material is divided into several elements which are in the from of 8-node hexahedral isoparametric elements. In shape rolling process, the materialis assumed to be a rigid-plastic body with uniform thickness. The distributionof velocity and the equivalent strain-rate can be calculaed from the velocityat nodal points and the functional can be minimized by the variation of thevelocity at all nodal points.The streamlines and the distribution of thicknesscan be obtained from the velocity field and boundary condition. More over, thedistribution of the eqivalent strain of the initial streamlines can be foundby integrating the eqivalent strain rate along the streamlines with the SlabMethod.Then,the flow stress can be sloved.On the assumption of the streamlinesto be the boundaries of the element, the mesh of new element can be generated.The rigid- plastic finite element method is applied to slove the mesh of newelement and the distribution of flow stress curve, and the distribution ofvelocity,stress,strain and strain rate of the element can be calculated.Repeatthe above procedures until the calculated result converges to the assumedcondition, the analytical results of the steady-state deformation can beobtained. In order to verify the availability of the developed numerical simulationmodel, some experiments of shape rolling are executed,and it show good coinci-dence with the analytical results.
Книги з теми "Combined model of electrothermal processes"
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Pollack, Detlef, and Gergely Rosta. Patterns and Determinants of Religious Change in the Modern Period. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198801665.003.0020.
Повний текст джерелаАнотація:
Chapter 14 does not design a general theory of religious change, but develops a multiple theoretical perspective including various theoretical elements, which are instrumental for explaining religious changes and which can be combined flexibly. In brief, they are: 1. Functional differentiation as a rule stands in a strained relationship to the integrational capacity of religious communities and churches. If, however, religious identities are linked with non-religious, for example, political, national, or economic interests, religion and church are strengthened. 2. Processes of individualization mostly have an erosive impact on religious ties. 3. In contrast to the assumptions of the market model, religious pluralism does not foster religious vitality, but actually inhibits it. In the case of conflict, though, religious diversity can fuel religious passions. Other determining factors such as government regulations of the religious sector, state spending on the welfare system, social inequality, immigration, and path dependency are also taken into account.
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De Laurentis, Giacomo, Eugenio Alaio, Elisa Corsi, Emanuelemaria Giusti, Marco Guairo, Carlo Palego, Luca Paulicelli, et al. Rischio di credito 2.0. AIFIRM, 2021. http://dx.doi.org/10.47473/2016ppa00030.
Повний текст джерелаАнотація:
The EBA Guidelines on loan origination and monitoring (hereinafter "GL LOM") undoubtedly represent a substantially new piece of the banking regulatory framework. In fact, for the first time, the regulator moves into a topic that was traditionally outside the scope of financial regulation, so far almost exclusively focused on aspects directly linked to both micro- and macro-prudential stability, notably through capital and liquidity management requirements and guidelines on Business Model and Internal Governance. The credit management process, and in particular loan origination and monitoring, has always been typically considered as a business issue under sole responsibility of banks, as it is considered one of the "core" processes (if not the "core" process) of the banking business. As a matter of fact, since the issue of the capital requirement regulation (i.e., Basel II and Basel III), and the introduction of the use requirements for the rating systems, the regulator moved very close, but not yet, to prescribe specific credit assessment criteria, while dictating methodological and organizational requirements for the authorization of the rating systems, and leaving substantial freedom to banks to define their own models and embedded assessment criteria and indicators. With the GL LOM, the regulator takes a further step, remarkably beyond its traditional remit, dictating principles and rules for the evaluation of the credit quality of borrowers. The starting point for this new approach from the regulator can be found in the ECB guidelines on Non-Performing Loans, later endorsed by the Bank of Italy Guidelines for Less Significant Banks, aimed at encouraging banks to define their NPL management processes and establish reduction plans to achieve NPL ratio targets in line with the regulator's expectations. Consistently with the focus on NPL, the regulation on Calendar Provisioning, amending the CRR was issued; as being a Regulation, it involves all banks, and not only significant ones (for which the ECB Addendum also applies). In addition, the new definition of default (the so-called "new Dod") has defined stricter criteria for the transition of exposures to the default status and also made the return of "cured" exposures to the performing status more difficult. The combined effect of these regulatory changes has been to make the default of counterparties not only more probable but also much more "expensive" for the banks. The natural “next step” of these regulatory changes was to "move backward" into the management process covering loan origination and monitoring . The EBA's stated objective with the issuance of the GL LOM is to define "robust and prudent" standards of lending practices so as to maintain a low level of NPLs in the future. Therefore, the focus of the GL LOM is the definition of requirements (some outlined as prescriptions, others in terms of principles) for the creditworthiness assessment of counterparties and for the management of the related data and information. Notwithstanding the fact that the Final Report has articulated the principle of proportionality much more clearly as compared to the Consultation Paper, the GLs set out three macro-categories of counterparties for which specific requirements are defined: • Individuals • Micro and small businesses • Medium and large companies. The GL LOM also provide recommendations about the valuation of guarantees both at origination and during ongoing monitoring, encouraging the use of advanced statistical models. The GL LOM focus on real estate guarantees, while financial collateral is outside the scope of the GL LOM. In the mind of the regulator, the GL LOM should not only reflect industry practices, but also incorporate the latest supervisory guidance on lending, and provide the stimulus to include ESG, AML/CTF and the use of innovative technologies into banking origination and, where applicable, monitoring processes.
Частини книг з теми "Combined model of electrothermal processes"
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Zarębski, Janusz, and Krzysztof Górecki. "D.C. Electrothermal Hybrid BJT Model for SPICE." In Simulation of Semiconductor Devices and Processes, 306–9. Vienna: Springer Vienna, 1995. http://dx.doi.org/10.1007/978-3-7091-6619-2_74.
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Lee, Kwang Soon, and Jay H. Lee. "Model-Based Predictive Control Combined with Iterative Learning for Batch or Repetitive Processes." In Iterative Learning Control, 313–34. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4615-5629-9_16.
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Kolditz, Olaf, Uwe-Jens Görke, Heinz Konietzky, Jobst Maßmann, Mathias Nest, Holger Steeb, Frank Wuttke, and Thomas Nagel. "Synthesis and Outlook." In GeomInt–Mechanical Integrity of Host Rocks, 227–42. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-61909-1_6.
Повний текст джерелаАнотація:
AbstractAs a result of the GeomInt research project (Chap. 1) a broad combined experimental and numerical platform for the investigation of discontinuities due to swelling and shrinking processes (WP1, Sect. 2.3), pressure-driven percolation (WP2, Sect. 2.4) and stress redistribution (WP3, Sect. 2.4) for important reservoir and barrier rocks (clay, salt, crystalline) has been developed. Model comparisons for damage and fracture processes driven by different processes provide information on the optimal areas of application of the numerical methods (Sect. 2.5).
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Gomes, Laidson Paes, Catarina Gouveia e Silva, Jean-Charles Gaillard, Jean Armengaud, and Ana Varela Coelho. "Characterization of Soluble Cell-Free Coelomic Fluid Proteome from the Starfish Marthasterias glacialis." In Methods in Molecular Biology, 583–97. New York, NY: Springer US, 2022. http://dx.doi.org/10.1007/978-1-0716-2172-1_31.
Повний текст джерелаАнотація:
AbstractProteomics combined to advanced bioinformatics tools is acquiring a pivotal role in the comprehensive understanding of living organism’s biology, in particular for non-model organisms, which includes most marine and aquatic invertebrates. Depicting of protein composition in a whole organ/organism followed by their assembling in functional protein association networks promotes the understanding of key biological processes. Here, we provide a detailed description of the extraction procedure of cell-free coelomic fluid soluble proteins and the characterization of the proteome of the starfish Marthasterias glacialis. Due to coelomic fluid richness in glycoproteins, which complicates protein identification, extracts of soluble proteins are deglycosylated prior to tandem mass spectrometry. This experimental approach is useful at improving knowledge on the coelomic fluid physiological role and deciphering its involvement in regeneration of starfish body parts when comparing different regeneration conditions.
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Lindelauf, Roy. "Nuclear Deterrence in the Algorithmic Age: Game Theory Revisited." In NL ARMS, 421–36. The Hague: T.M.C. Asser Press, 2020. http://dx.doi.org/10.1007/978-94-6265-419-8_22.
Повний текст джерелаАнотація:
AbstractCommonly used game and decision theoretic models fail to explain the empirics of deterrence. This has unjustly led many theorists to criticize the (rationality and other) assumptions underpinning of such models. No serious game theorist will contend that his theoretic model will possibly take account of all the peculiarities involved in decision making and therefore be an accurate model of such situations. Games are an aid to thinking about some of the aspects of the broader situation. Game theory models prescribe what a decision maker ought to do in a given situation, not what a decision maker actually does. To maintain nuclear strategic stability, it is of paramount importance to understand the dynamical interplay between all players involved in decision making processes with regard to nuclear strategy. History has shown some progress in understanding nuclear deterrence by the use of initial game- and decision theoretic models to alleviate the burden of human cognitive biases. Since it is highly likely that (semi-)autonomous systems will in some way participate in the future nuclear strategic landscape, combined with the fact that the nuclear deterrent decision-cycle will also be based on algorithmic analysis, rational deterrence theory is and should be an integral element of strategic thinking about nuclear deterrence. That, or it might as well be game over.
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Jeng, Jyh-Cheng. "Data-Based Tuning of PID Controllers: A Combined Model- Reference and VRFT Method." In PID Control for Industrial Processes. InTech, 2018. http://dx.doi.org/10.5772/intechopen.75835.
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Kannegieser, Ehm, Daniel Atorf, and Josua Meier. "Surveying Games With a Combined Model of Immersion and Flow." In Advances in Computational Intelligence and Robotics, 59–70. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-9069-9.ch004.
Повний текст джерелаАнотація:
Detecting flow in games is key for successful adaptation processes. Until now, the method of choice to measure flow in games is the usage of questionnaires, such as flow short scale or game experience questionnaire. Because of the shortcomings of these methods, the theoretical model of flow is enhanced by the concept of immersion to propose a unified flow/immersion model. In combination with this more fine-grained model of immersion, player experience may be measured in a more detailed fashion. The enhancement of the theoretical model and the altered experiment procedure are presented. In conclusion, a perspective towards performing the experiment and future data recordings is given.
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Shafiee, Sara, Zaza Nadja Lee Herbert-Hansen, Lars Hvam, Anders Haug, Martin Bonev, and Niels Henrik Mortensen. "Development of a Design-Time Estimation Model for Complex Engineering Processes." In Advances in Transdisciplinary Engineering. IOS Press, 2019. http://dx.doi.org/10.3233/atde190136.
Повний текст джерелаАнотація:
The current business environment presents challenges for companies, including increased pressure on time to market, customer expectations, cost and increased competition. To overcome the challenges in the new business environment, the companies introduce common products components and variants in order to reduce complexity and improve the performance. Besides, the manufacturers attempt to increase the variety in products and services in response to the personalization demands; which leads to more complexity. However, the companies can improve the due-date setting and resource allocation to optimize internal process performance. This paper describes a design-time estimation model for planning engineering activities based on a quantification of the most important product complexity factors such as: 1) basic components variety, 2) functional requirements, 3) design interdependencies and 4) regulations and standards. Such factors can decrease or increase the expected time consumption for the specification tasks. This paper identifies key factors essential to assessing the expected hours for specific engineering tasks based on a case study and literature review. Qualitative and quantitative information was obtained by means of (i) archival documents, (ii) participant-observations, and (iii) workshops in the case company. These complexity factors are then combined to develop a mathematical design-time estimation model that supports the internal performance optimization in a given engineering design process. Finally, an IT tool is prototyped and tested in an engineering company. In conclusion, the developed model and IT tool assist the case company to improve the estimations for due-date setting and resource allocation to optimize internal process performance.
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Cai, Ziyin, and Enlong Liu. "Numerical Simulation of Sliding Processes of Yigong Landslide Subjected to Seismic Loading." In Advances in Transdisciplinary Engineering. IOS Press, 2022. http://dx.doi.org/10.3233/atde220017.
Повний текст джерелаАнотація:
The Yigong landslide is simulated and analyzed with a combined finite-discrete method (FDEM) under seismic loading. Determination of computing model and parameters are introduced. The final distances of six reference points are given showing a special distribution in accord with the results of field investigation. Also, the velocity time-history curves of these points are depicted, where two trends are captured for these points matching with the sliding process of the Yigong landslide. Inconsistencies of displacements and velocities of these points result from the generation and propagation of cracks, initiating the landslide eventually. The FDEM works well in the simulation of this landslide, revealing its applicability and advantages.
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Alba-Baena, Noe, Francisco J. Estrada, and Oswaldo Omar Sierra Torres. "Using Lean-Sigma for the Integration of Two Products during a Ramp-Up Event." In Handbook of Research on Managerial Strategies for Achieving Optimal Performance in Industrial Processes, 405–27. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-5225-0130-5.ch019.
Повний текст джерелаАнотація:
Keeping up the quality level in in a manufacturing environment has become an issue when trying to start the production of a new product which is in a ramp-up stage into a running production line ramp-down model. If production of the old model is ended too fast will make shortages in the customer supply, and will have excessive inventory numbers of the newer product. Trying the re-design in a production line to keep building the old model while incorporating the newer tends to create an undesirable impact on quality and productivity. Nowadays, continuous improvement methodologies like Lean and Six Sigma are used to solve this challenge. While Lean Manufacturing tends to be efficient for quick fixes, Six Sigma works better when there is plenty of time to conduct deeper statistical analysis. This chapter describes a combination of Lean Manufacturing speed with the Six Sigma analysis' power. Combined to maintain the quality and productivity of a production process during such conditions.
Тези доповідей конференцій з теми "Combined model of electrothermal processes"
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Wang, Chao, Chunqiu Zhang, Han Wu, and Xin Dong. "Bone Adaptation Model Combined Micro-Modeling and Remodeling Processes." In 2011 5th International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2011. http://dx.doi.org/10.1109/icbbe.2011.5780457.
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Vinnichenko, A. V. "DYNAMIC MODEL OF COMBINED AGGREGATION OF ADDITIVE MANUFACTURING PROCESS." In MODELING AND SITUATIONAL MANAGEMENT THE QUALITY OF COMPLEX SYSTEMS. Saint Petersburg State University of Aerospace Instrumentation, 2021. http://dx.doi.org/10.31799/978-5-8088-1558-2-2021-2-112-116.
Повний текст джерелаАнотація:
The paper presents methods and approaches for mathematical modeling and rationalization of flexible additive manufacturing, as well as other processes by which it is possible to create additive models for their integration into the system of experimental or pilot production. The work has also formed and synthesized a process model, which includes flexible production indicators, service indicators, and a developed criterion base for their assessment. The work takes into account the optimization criteria, as well as maximizing and minimizing risks for additive manufacturing, taking into account the possible risk component when deploying new processes for experimental and small-scale production. The models and methods described in the article will make it possible to carry out mathematical modeling and subsequent improvements for the flexible production process using additive technologies, used as a means of achieving the rational use of existing production resources within the framework of existing scientific and production complexes.
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Yang, Hongqiang, and Fanfei Zeng. "Design of Internal Model Control Oriented PID for Typical Thermal Processes in Combined Cycle Unit." In 2019 IEEE 8th Data Driven Control and Learning Systems Conference (DDCLS). IEEE, 2019. http://dx.doi.org/10.1109/ddcls.2019.8909053.
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Gott, Kevin, Anil K. Kulkarni, and Jogender Singh. "A Combined Rarefied and Continuum Flow Regime Model for Physical Vapor Deposition (PVD) Manufacturing Processes." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-10796.
Повний текст джерелаАнотація:
Several modifications to physical vapor deposition (PVD) models are proposed to address the deficiencies in current theoretical studies. Simple calculations show that the flow regime of PVD fabrications will most likely vary from a continuum flow to a rarefied flow in the vacuum chamber as the vapor cloud expands toward the substrate. The flow regime for an evaporated ideal gas is calculated and then an improved equation of state is constructed and analyzed that more accurately describes vaporized metals. The result, combined with experimental observations, suggests PVD fabrication is best represented by a multi-regime flow. Then, a CFD analysis is summarized that further validates the multi-regime analysis hypothesis. Finally, a methodology for constructing and implementing the results of a theoretical multi-regime PVD model is presented.
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Butler, Jeffrey T., and Victor M. Bright. "Electrothermal and Fabrication Modeling of Polysilicon Thermal Actuators." In ASME 1998 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/imece1998-1302.
Повний текст джерелаАнотація:
Abstract An electrothermal model of polysilicon thermal actuators has been developed. The electrothermal model requires knowledge of key material parameters, such as polysilicon resistivity, which vary based on the fabrication process. Empirical measurements and a TSUPREM model of the Multi-Users MEMS Processes (MUMPs) were used to analyze the polysilicon resistance characteristics. The electrothermal model was implemented in SPICE. The use of an electrical circuit simulator allowed simultaneous analysis of integrated MEMS and microelectronic systems. The SPICE model was successfully applied to a lateral thermal actuator and a thermal piston micromirror fabricated in MUMPs. The model results show excellent agreement with measured data.
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Helmons, Rudy L. J., Sape A. Miedema, and Cees van Rhee. "A New Approach to Model Hyperbaric Rock Cutting Processes." In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-23671.
Повний текст джерелаАнотація:
In deep sea mining processes, rock is being cut in a hyperbaric pressure environment. The effect of such a high pressure environment is of major influence on the cutting process. Due to deformation of the rock matrix, local fluid pressure differences will occur. This can result in a higher apparent strength of the rock, but also in a higher (loading) rate dependency. Our new modeling approach aims at combining both rock mechanics and fluid dynamics to model the high deformation (rate) behavior experienced in seabed excavations. This new approach is based on the Discrete Element Method to simulate the rock mechanics, combined with the use of Smoothed Particle Methods to model the influence of the fluid (pressure) on and in the rock. In this paper, emphasis is put on estimating the local (volumetric) deformation rate with the new approach. Eventually, the new technique will be validated with experiments and data available in literature. The new approach will give more insight in the physical processes that occur during cutting.
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Pei, Peng, and Manohar Kulkarni. "A Model for Analysis of Integrated Gasification Combined Cycle Power Plant With Carbon Dioxide Capture." In ASME 2008 Power Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/power2008-60124.
Повний текст джерелаАнотація:
Integrated Gasification Combined Cycle (IGCC) is believed to be one of the most promising technologies to offer electricity and other de-carbon fuels with carbon capture requirement at a relatively low cost. With the process of carbon dioxide capture, it can also actually meet strict regulations for other pollutants emission. However, the performances can vary depending on what kinds of technologies or processes are used. This paper has developed a model and calculated by using Engineering Equation Solver (EES) program to determine and compare different available technologies and processes. There are four main components in the model: Gasification Island; Gas Cleanup Island; Carbon Dioxide Capture Island and Power Island. Among them, the different options of Gasification Island; and Carbon Dioxide Capture Island are expected to be the most effective factors to influence the performance of the plant. Therefore, different gasification processes are examined in this paper, including Shell, GE (Texaco) and Lurgi. The carbon dioxide capture processes are based on SELEXOL, a physical absorption process, because of the high partial pressure of carbon dioxide in the syngas. A process called “double-absorption” is used for capturing sulfur compounds and carbon dioxide. This paper calculated and compared the net outputs, efficiency penalties for CO2 capture part, and net plant efficiencies for different technologies and processes by using EES program. This model tries to treat the IGCC with carbon dioxide capture part as a whole thermal system, instead of just looking at the capture system alone. Different gasification technologies mentioned above will result in various paths and efficiencies of using steam and waste energy in the system. It will make reasonable use of various waste energies and steams for both mechanical and chemical processes to improve the performance of the plant, and incorporate a CO2 capture system into the design concept of the power plant.
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Hmelnov, A. E., and A. S. Gachenko. "Construction of nearshore elevation model using open satellite data." In Spatial Data Processing for Monitoring of Natural and Anthropogenic Processes 2021. Crossref, 2021. http://dx.doi.org/10.25743/sdm.2021.34.72.014.
Повний текст джерелаАнотація:
For the tasks considering changes of water level it is required to have a combined (above water and underwater) elevation model. And the highest accuracy requirements are imposed on the parts of the model, which produce the contour lines in the range of the actual water level changes, while the information about the underwater elevation is usually very scarce and rough. In the article we consider the possibility to obtain this part of the elevation model using open high resolution (10 m/pixel) satellite images corresponding to different water levels. Here we describe the technique, which allows us to obtain the subpixel accuracy of the resulting contour lines. And we consider the problems in the quality of the satellite images that the contour lines reveal, and some ways to deal with the problems.
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Taherizadeh, Aboozar, Daniel E. Green, and Jeong W. Yoon. "Anisotropic hardening model based on non-associated flow rule and combined nonlinear kinematic hardening for sheet materials." In NUMISHEET 2014: The 9th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes: Part A Benchmark Problems and Results and Part B General Papers. AIP, 2013. http://dx.doi.org/10.1063/1.4850020.
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Abu Al-Rub, Rashid K., George Z. Voyiadjis, and Anthony N. Palazotto. "A Micro-Damage Model for High Velocity Impact Using Combined Viscosity and Gradient Localization Limiters." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-81342.
Повний текст джерелаАнотація:
During dynamic loading processes, large inelastic deformation associated with high strain rates leads, for a broad class of ductile metals, to degradation and failure by strain localization. However, as soon as material failure dominates a deformation process, the material increasingly displays strain softening and the finite element computations are considerably affected by the mesh size and alignment. This gives rise to a non-physical description of the localized regions. This paper presents theoretical and computational frameworks to solve this problem with the aid of nonlocal gradient-enhanced theory coupled to visco-inelasticity. Constitutive equations for anisotropic thermo-viscodamage (rate-dependent damage) mechanism coupled with thermo-hypoelasto-viscoplastic deformation are developed in this work within the framework of thermodynamic laws, nonlinear continuum mechanics, and nonlocal continua. Explicit and implicit micro-structural length scale measures, which preserve the well-posedness of the differential equations, are introduced through the use of the viscosity and gradient localization limiters.
Звіти організацій з теми "Combined model of electrothermal processes"
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Douglas, Thomas, and Caiyun Zhang. Machine learning analyses of remote sensing measurements establish strong relationships between vegetation and snow depth in the boreal forest of Interior Alaska. Engineer Research and Development Center (U.S.), July 2021. http://dx.doi.org/10.21079/11681/41222.
Повний текст джерелаАнотація:
The seasonal snowpack plays a critical role in Arctic and boreal hydrologic and ecologic processes. Though snow depth can be different from one season to another there are repeated relationships between ecotype and snowpack depth. Alterations to the seasonal snowpack, which plays a critical role in regulating wintertime soil thermal conditions, have major ramifications for near-surface permafrost. Therefore, relationships between vegetation and snowpack depth are critical for identifying how present and projected future changes in winter season processes or land cover will affect permafrost. Vegetation and snow cover areal extent can be assessed rapidly over large spatial scales with remote sensing methods, however, measuring snow depth remotely has proven difficult. This makes snow depth–vegetation relationships a potential means of assessing snowpack characteristics. In this study, we combined airborne hyperspectral and LiDAR data with machine learning methods to characterize relationships between ecotype and the end of winter snowpack depth. Our results show hyperspectral measurements account for two thirds or more of the variance in the relationship between ecotype and snow depth. An ensemble analysis of model outputs using hyperspectral and LiDAR measurements yields the strongest relationships between ecotype and snow depth. Our results can be applied across the boreal biome to model the coupling effects between vegetation and snowpack depth.
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Nelson, Nathan, and Charles F. Yocum. Structure, Function and Utilization of Plant Photosynthetic Reaction Centers. United States Department of Agriculture, September 2012. http://dx.doi.org/10.32747/2012.7699846.bard.
Повний текст джерелаАнотація:
Light capturing and energy conversion by PSI is one of the most fundamental processes in nature. In the heart of these adaptations stand PSI, PSII and their light harvesting antenna complexes. The main goal of this grant proposal was to obtain by X-ray crystallography information on the structure of plant photosystem I (PSI) and photosystem II (PSII) supercomplexes. We achieved several milestones along this line but as yet, like several strong laboratories around the world, we have no crystal structure of plant PSII. We have redesigned the purification and crystallization procedures and recently solved the crystal structure of the PSI supercomplex at 3.3 Å resolution. Even though this advance in resolution appears to be relatively small, we obtained a significantly improved model of the supercomplex. The work was published in J. Biol. Chem. (Amunts et al., 2010). The improved electron density map yielded identification and tracing of the PsaK subunit. The location of an additional 10 ß-carotenes, as well as 5 chlorophylls and several loop regions that were previously uninterruptable have been modeled. This represents the most complete plant PSI structure obtained thus far, revealing the locations of and interactions among 17 protein subunits and 193 non-covalently bound photochemical cofactors. We have continued extensive experimental efforts to improve the structure of plant PSI and to obtain PSII preparation amenable to crystallization. Most of our efforts were devoted to obtain well-defined subcomplexes of plant PSII preparations that are amenable to crystallization. We studied the apparent paradox of the high sensitivity of oxygen evolution of isolated thylakoids while BBY particles exhibit remarkable resilience to the same treatment. The integrity of the photosystem II (PSII) extrinsic protein complement as well as calcium effects arise from the Ca2+ atom associated with the site of photosynthetic water oxidation were investigated. This work provides deeper insights into the interaction of PsbO with PSII. Sight-directed mutagenesis indicated the location of critical sites involved in the stability of the water oxidation reaction. When combined with previous results, the data lead to a more detailed model for PsbO binding in eukaryotic PSII.
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Handa, Avtar K., Yuval Eshdat, Avichai Perl, Bruce A. Watkins, Doron Holland, and David Levy. Enhancing Quality Attributes of Potato and Tomato by Modifying and Controlling their Oxidative Stress Outcome. United States Department of Agriculture, May 2004. http://dx.doi.org/10.32747/2004.7586532.bard.
Повний текст джерелаАнотація:
General The final goal and overall objective of the current research has been to modify lipid hydroperoxidation in order to create desirable phenotypes in two important crops, potato and tomato, which normally are exposed to abiotic stress associated with such oxidation. The specific original objectives were: (i) the roles of lipoxygenase (LOX) and phospholipids hydroperoxide glutathione peroxidase (PHGPx) in regulating endogenous levels of lipid peroxidation in plant tissues; (ii) the effect of modified lipid peroxidation on fruit ripening, tuber quality, crop productivity and abiotic stress tolerance; (iii) the effect of simultaneous reduction of LOX and increase of PHGPx activities on fruit ripening and tuber quality; and (iv) the role of lipid peroxidation on expression of specific genes. We proposed to accomplish the research goal by genetic engineering of the metabolic activities of LOX and PHGPx using regulatable and tissue specific promoters, and study of the relationships between these two consecutive enzymes in the metabolism and catabolism of phospholipids hydroperoxides. USA Significant progress was made in accomplishing all objectives of proposed research. Due to inability to regenerate tomato plants after transforming with 35S-PHGPx chimeric gene construct, the role of low catalase induced oxidative stress instead of PHGPx was evaluated on agronomical performance of tomato plant and fruit quality attributes. Effects of polyamine, that protects DNA from oxidative stress, were also evaluated. The transgenic plants under expressing lipoxygenase (LOX-sup) were crossed with catalase antisense (CAT-anti) plants or polyamine over producing plants (SAM-over) and the lines homozygous for the two transgenes were selected. Agronomical performance of these line showed that low catalase induced oxidative stress negatively affected growth and development of tomato plants and resulted in a massive change in fruit gene expression. These effects of low catalase activity induced oxidative stress, including the massive shift in gene expression, were greatly overcome by the low lipoxygenase activity. Collectively results show that oxidative stress plays significant role in plant growth including the fruit growth. These results also for the first time indicated that a crosstalk between oxidative stress and lipoxygenase regulated processes determine the outcome during plant growth and development. Israel Regarding PHGPx, most of the study has concentrated on the first and the last specific objectives, since it became evident that plant transformation with this gene is not obvious. Following inability to achieve efficient transformation of potato and tomato using a variety of promoters, model plant systems (tobacco and potato cell cultures, tobacco calli and plantlets, and Arabidopsis) were used to establish the factors and to study the obstacles which prohibited the regeneration of plants carrying the genetic machinery for overproduction of PHGPx. Our results clearly demonstrate that while genetic transformation and over-expression of PHGPx occurs in pre-developmental tissue stage (cell culture, calli clusters) or in completed plant (Arabidopsis), it is likely that over-expression of this enzyme before tissue differentiation is leading to a halt of the regeneration process. To support this assumption, experiments, in which genetic engineering of a point-mutated PHGPx gene enable transformation and over-expression in plants of PhSPY modified in its catalytic site and thus inactive enzymatically, were successfully carried out. These combined results strongly suggest, that if in fact, like in animals and as we established in vitro, the plant PHGPx exhibits PH peroxidase activity, these peroxides are vital for the organisms developmental process.