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Development of an Autonomous Flight Control System for Small Size Unmanned Helicopter Based on Dynamical Model

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Journal of Shanghai Jiaotong university(Science) 2007年第6期12卷 744-752页

作者：王赓 Kondak konstantin Marek Musial 盛焕烨吕恬生 Hommel Günter Dept. of Computer Sci. & Eng. Shanghai Jiaotong Univ. Dept. of Computer Sci. & Electronics Technische Univ. Eng. Training Center Shanghai Jiaotong Univ.

It is devoted to the development of an autonomous flight control system for small size unmanned helicopter based on dynamical model. At first, the mathematical model of a small size helicopter is described. After that simple but effective MTCV control algorithm was proposed. The whole flight control algorithm is composed of two parts: orientation controller based on the model for rotation dynamics and a robust position controller for a double integrator. The MTCV block is also used to achieve translation velocity control. To demonstrate the performance of the presented algorithm, simulation results and results achieved in real flight experiments were presented.

关键词： unmanned helicopter dynamical model flight control unmanned aerial vehicle (UAV)

Small Ubiquitin-Like Modifier Conjugating Enzyme with Active Site Mutation Acts as Dominant Negative Inhibitor of SUMO Conjugation in Arabidopsis

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Journal of Integrative Plant Biology 2013年第1期55卷 75-82页

作者： konstantin Tomanov Christian Hardtke Ruchika Budhiraja Rebecca Hermkes George Coupland Andreas Bachmair Department of Biochemistry and Cell Biology Max F. Perutz Laboratories Center for Molecular Biology University of Vienna Department of Plant Molecular Biology University of Lausanne Department of Plant Developmental Biology Max Planck Institute for Plant Breeding Research

Small ubiquitin-like modifier （SUMO） conjugation affects a broad range of processes in plants, including growth, flower initiation, pathogen defense, and responses to abiotic stress. Here, we investigate in vivo and in vitro a SUMO conjugating enzyme with a Cys to Ser change in the active site, and show that it has a dominant negative effect. In planta expression significantly perturbs normal development, leading to growth retardation, early flowering and gene expression changes. We suggest that the mutant protein can serve as a probe to investigate sumoylation, also in plants for which poor genetic infrastructure precludes analysis via loss-of-function mutants.

关键词： Agroinfection conjugating enzyme dominant-negative active site mutation small ubiquitin-like modifier conjugation small ubiquitin-like modifier.

Synthetic polymers:A review of applications in drilling fluids

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Petroleum Science 2024年第1期21卷 475-518页

作者： Shadfar Davoodi Mohammed Al-Shargabi David A.Wood Valeriy S.Rukavishnikov konstantin M.Minaev School of Earth Sciences&Engineering Tomsk Polytechnic UniversityLenin AvenueTomskRussia DWA Energy Limited LincolnUnited Kingdom

With the growth of deep drilling and the complexity of the well profile,the requirements for a more complete and efficient exploitation of productive formations increase,which increases the risk of various ***,reagents based on modified natural polymers(which are naturally occurring compounds)and synthetic polymers(SPs)which are polymeric compounds created industrially,are widely used to prevent emerging complications in the drilling ***,compared to modified natural polymers,SPs form a family of high-molecular-weight compounds that are fully synthesized by undergoing chemical polymerization *** provide substantial flexibility in their ***,their size and chemical composition can be adjusted to provide properties for nearly all the functional objectives of drilling *** can be classified based on chemical ingredients,type of reaction,and their responses to ***,some of SPs,due to their structural characteristics,have a high cost,a poor temperature and salt resistance in drilling fluids,and degradation begins when the temperature reaches 130℃.These drawbacks prevent SP use in some medium and deep ***,this review addresses the historical development,the characteristics,manufacturing methods,classification,and the applications of SPs in drilling *** contributions of SPs as additives to drilling fluids to enhance rheology,filtrate generation,carrying of cuttings,fluid lubricity,and clay/shale stability are explained in *** mechanisms,impacts,and advances achieved when SPs are added to drilling fluids are also *** typical challenges encountered by SPs when deployed in drilling fluids and their advantages and drawbacks are also *** issues also impact the applications of SPs in drilling ***,the cost of the most relevant SPs,and the monomers used in their synthesis,are *** impacts of SPs when deployed in drilling fluids,and t

关键词： Synthetic versus natural polymers Nanopolymers Drilling fluid additives Lubricity Clay swelling Hole cleaning

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土石坝竖向排水的渗流控制(英文)

岩土工程学报 2008年第11期30卷 1657-1660页

作者： Abdelkader Djehiche konstantin Kotchev L.G.C.U. Amar Telidji University Laghouat 03000 Laghouat Algeria Potyteehniea Sofia Bulgaria

水流通过坝体和坝基时存在压力和梯度,这在大坝工程设计中已视为重要因素。但是,在土石坝设计时往往会遇到抵御不利大坝安全因素的排水系统的选型和设计问题。目前,很多工程中虽存在一些效果不错的排水系统,但其缺乏渗流和浸润线位置的... 详细信息

水流通过坝体和坝基时存在压力和梯度,这在大坝工程设计中已视为重要因素。但是,在土石坝设计时往往会遇到抵御不利大坝安全因素的排水系统的选型和设计问题。目前,很多工程中虽存在一些效果不错的排水系统,但其缺乏渗流和浸润线位置的控制,可能会对工程安全产生威胁,或使渗流控制措施达不到经济有效的目的。为此,本文基于均质土坝实验研究取得的成果,研究出在竖向排水体中的渗流量的控制方法,采用这种方法可以对土石坝进行更好的管理。

关键词：渗流土石坝竖向排水排水体位置流量

Plasma treatment for enhancement of the sorption capacity of carbon fabric

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Plasma Science and Technology 2021年第12期23卷 150-160页

作者： IIya ZADIRIEV Elena KRALKINA Vladimir SAMOILOV Victoria ELCHANINOVA Valentina GORINA Ilya IVANENKO konstantin VAVILIN Alexander NIKONOV Physical Electronics Department Faculty of PhysicsLomonosov Moscow State University119991 MoscowRussia Research Institute for Graphite-Based Structural Materials‘Nllgrafit’ 1524 MoscowRussia

In this work we carried out an experimental investigation into enhancement of the sorption capacity of carbon fabric using plasma treatment *** fabric is based on viscose fiber and is hydrophobic by *** of the fabric sorption capacity is required for its application in *** this purpose,two plasma treatment methods were considered,*** nonequilibrium radiofrequency(RF)discharge and a vacuum RF plasma source with an external magnetic *** treated by atmospheric discharge demonstrated aging effects during the first week after *** sorption capacity of samples treated by the RF plasma source was stable over the same period and reached values as high as *** of the beam created by the vacuum RF plasma source were analyzed and dependences of the fabric sorption capacity and specific surface area on plasma treatment time were *** found that sorption capacity reached its maximum value after 30 min of treatment and did not change significantly if processing was continued,while the specific surface area reached its maximum after 3 min of treatment and quickly decreased after *** was found that the micropore structure of the fabric remained almost the same during plasma *** volume of mesopores in a unit of the fabric mass(specific volume)doubled during the first 5 min of treatment and returned to initial values after 30 min of *** sorption capacity continued to increase even when the specific surface area decreased after reaching its peak *** indicates the important role of surface functional groups formed on carbon fibers during plasma *** is consistent with the results of x-ray photoelectron spectroscopy analysis showing changes in surface oxidation during plasma treatment.

关键词： carbon fabric sorption plasma treatment radiofrequency

Low Na-β″-alumina electrolyte/cathode interfacial resistance enabled by a hydroborate electrolyte opening up new cell architecture designs for all-solid-state sodium batteries

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Materials Futures 2022年第3期1卷 1-8页

作者： Marie-Claude Bay Rabeb Grissa konstantin V Egorov Ryo Asakura Corsin Battaglia Empa Swiss Federal Laboratories for Materials Science and TechnologyÜberlandstrasse 1298600 DübendorfSwitzerland

Development of low-resistance electrode/electrolyte interfaces is key for enabling all-solid-state batteries with fast-charging *** interfacial resistance and high current density were demonstrated for Na-β″-alumina/sodium metal interfaces,making Na-β″-alumina a promising solid electrolyte for high-energy all-solid-state ***,integration of Na-β″-alumina with a high-energy sodium-ion intercalation cathode remains ***,we report a proof-of-concept study that targets the implementation of a Na-β″-alumina ceramic electrolyte with a slurry-casted porous NaCrO_(2) cathode with infiltrated sodium hydroborates as secondary *** hydroborate Na4(B_(12)H_(12))(B_(10)H_(10))possesses similar sodium-ion conductivity of 1 mS cm^(-1) at room temperature as Na-β″-alumina and can be fully densified by cold *** the Na4(B_(12)H_(12))(B_(10)H_(10))secondary electrolyte as interlayer between Na-β″-alumina and NaCrO_(2),we obtain a cathode-electrolyte interfacial resistance of only 25Ωcm^(2) after cold pressing at 70 ***-of-concept cells with a sodium metal anode and a NaCrO_(2) cathode feature an initial discharge capacity of 103 mAh g^(-1) at C/10 and 42 mAh g^(-1) at 1 C with an excellent capacity retention of 88%after 100 cycles at 1 C at room ***-milled cross-sections of the cathode/electrolyte interface demonstrate that intimate contact is maintained during cycling,proving that the use of hydroborates as secondary electrolyte and as an interlayer is a promising approach for the development of all-solid-state batteries with ceramic electrolytes.

关键词： interface all-solid-state battery sodium metal anode hydroborate electrolyte Na-β″-alumina electrolyte

Altitude-dependent distribution of 137Cs in the environment:a case study of Aragats massif, Armenia

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Acta Geochimica 2020年第1期39卷 127-138页

作者： konstantin Pyuskyulyan Stephen P.LaMont Vovik Atoyan Olga Belyaeva Nona Movsisyan Armen Saghatelyan Armenian Nuclear Power Plant MetsamorArmenia Nuclear and Radiochemistry Los Alamos National LaboratoryLos AlamosUSA Radioecology Department Center for Ecological-Noosphere StudiesNAS RA.YerevanArmenia

This paper considers the distribution of technogenic 137Cs and naturally occurring radionuclides:238 U,232 Th and40 R concentrations in soils and 137Cs in atmospheric dry depositions by altitudinal belts of the Aragats mountain massif,Republic of *** soil samples were collected at altitudes from 1000 to 3200 *** the determination of geochemical variability,two soil sampling campaigns were *** dry depositions were sampled from five stations at1100-3200 m collected onto organic fiber filters between June and December 2016.137Cs activity was measured using a high-purity Germanium detector coupled to a multichannel analyzer(Canberra).Results indicated that specific activity of 137Cs in soils at 1000 m is495-528 Bq m^-2,andat3200 mis10,500-11,470 Bq m^-*** correlation observed for 137Cs versus naturally occurring radionuclides,which varies in distribution by *** activities of 137Cs in dry atmospheric depositions varies from 1.06 at 846 m to2.37 Bq m^-2 per quarter at 3200 m and increases as the altitude *** of 137Cs in soil and dry atmospheric deposition correlated significantly,and 137Cs activity in soils and atmospheric dry depositions decrease as the absolute altitude *** 50-year effective dose from exposure to 137Cs fallout varies with altitude from 0.007 to 1.42 m Sv.

关键词： 137Cs Distribution by altitude Naturally occurring radionuclides Topsoil Dry atmospheric depositions Gamma radiation Mountain regions

Explainability and Interpretability in Electric Load Forecasting Using Machine Learning Techniques–A Review

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Energy and AI 2024年第2期16卷 483-496页

作者： Lukas Baur konstantin Ditschuneit Maximilian Schambach Can Kaymakci Thomas Wollmann Alexander Sauer Fraunhofer Institute for Manufacturing Engineering and Automation IPA Nobelstraße 12Stuttgart70569Germany Institute for Energy Efficiency in Production(EEP) University of StuttgartNobelstraße 12Stuttgart70569Germany Merantix Momentum GmbH Max-Urich-Straße 3Berlin13355Germany

Electric Load Forecasting(ELF)is the central instrument for planning and controlling demand response programs,electricity trading,and consumption *** to the increasing automation of these processes,meaningful and transparent forecasts become more and more ***,at the same time,the complexity of the used machine learning models and architectures *** there is an increasing interest in interpretable and explainable load forecasting methods,this work conducts a literature review to present already applied approaches regarding explainability and interpretability for load forecasts using Machine *** on extensive literature research covering eight publication portals,recurring modeling approaches,trends,and modeling techniques are identified and clustered by properties to achieve more interpretable and explainable load *** results on interpretability show an increase in the use of probabilistic models,methods for time series decomposition and the use of fuzzy logic in addition to classically interpretable *** explainable approaches are Feature Importance and Attention *** discussion shows that a lot of knowledge from the related field of time series forecasting still needs to be adapted to the problems in *** to other applications of explainable and interpretable methods such as clustering,there are currently relatively few research results,but with an increasing trend.

关键词： Electric load forecasting Explainability InterpretabilityStructured review

Study on Stability and Efficiency of High-Power Ultrawideband Radiation Source

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Journal of Energy and Power Engineering 2012年第5期6卷 771-776页

作者： Vladimir I. koshelev Yury A. Andreev Anatoly M. Efremov Boris M. Kovalchuk Vyacheslav V. Plisko konstantin N. Sukhushin Shuhua Liu Microwave Electronics Laboratory and Pulsed Power Department Institute of High Current Electronics SB RAS Tomsk 634055Russia High Current Electronics Department at the Institute of High Technology Physics National Research Tomsk PolytechnicUniversity Tomsk 634050 Russia

Investigations are directed to the development of high-power sources ofUWB （ultrawideband） radiation based on excitation of anterma arrays with bipolar voltage pulses. In the previously designed high-power UWB sources only one bipolar pulse former and different feeder systems for pulse distribution through the array elements were used. By means of this approach, a number of UWB sources were created with the bipolar voltage pulse length ranging from 0.2 to 2 ns and effective potential of radiation ranging from 0.4 to 3 MV. The approach has got a restriction related to the electrical breakdown in a bipolar voltage pulse former. A new approach to the creation of high-power UWB sources based on a multicharmel bipolar pulse former is suggested： the number of bipolar pulse formers is equal to the number of antennas in the array. The main problem in realization of this approach is a stable operation of bipolar pulse formers in order to ensure a coherent summation of radiated pulses in the far-field zone. The result of this work is the instability of-150 ps at the pulse length of 3 ns obtained in a one-channel bipolar pulse former indicating that the suggested approach is realizable.

关键词： Monopolar pulse generator bipolar pulse former combined transmitting antenna ultrawideband radiation.