检索结果-南通市图书馆

Adsorbents for Gas Storage: Gas Energy, Sorbent Energy and Their Relationship to Capacity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Materials Physics and Chemistry 2022年第10期12卷 221-239页

作者： leonid Titelman Department of Chemical Engineering Ben-Gurion University of the Negev Beer Sheva Israel

Generalized variables make it possible to reveal the nuances of the structure of porous materials and divide samples into their series with similar properties (Titelman, L. AMPC 2021, vol. 11, No. 11). Adsorbents for gas storage have a unique set of variables that can be combined: textural and mechanical properties of the adsorbent, preparation conditions, pressure and temperature of gas during storage and delivery. Taking gas pressure and mechanical strength as forces, textural properties as displacements, we obtained the energies of gas and sorbent as generalized variables. The interrelationships between them and the storage capacity for metal-organic frameworks, porous organic polymers and activated carbons were studied. Due to the variety of sorbents and the attracting effect of micropore walls on gas adsorption, the previously proposed average thickness of the probing gas layer is useful as estimation of the pore size. Its effect on adsorbent capacity was tested. The ratio of the gas layer to the kinetic diameter of the molecule gives the packing of molecules inside the pores and makes it possible to represent the pore model. Excessive surface area results in too small pores, repulsive forces and reduced capacitance. Sometimes the gas energy correlates better with the residual adsorption uptake than with the total or delivery capacity. Compared to texture parameters, the proposed generalized variables correlate better with sorbent capacity.

关键词： Generalized Parameter Gas Energy Sorbent Energy Number of Gas Layers Porous Materials

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

基于显著感知与一致性约束的目标跟踪算法

北京航空航天大学学报 2023年第9期49卷 2244-2257页

作者：国强吴天昊徐伟 CHORNOGOR leonid 哈尔滨工程大学信息与通信工程学院哈尔滨150001 先进船舶通信与信息技术工业和信息化部重点实验室哈尔滨150001 哈尔科夫国立大学无线电物理学院哈尔科夫61166

针对空间正则相关滤波(SRDCF)算法正则权重固定和模型退化等问题,提出了一种基于显著感知与一致性约束的目标跟踪算法。提取方向梯度直方图特征、浅层特征及中层特征进行融合,提升物体外观模型的表达能力;通过显著性检测算法获得初始帧... 详细信息

针对空间正则相关滤波(SRDCF)算法正则权重固定和模型退化等问题,提出了一种基于显著感知与一致性约束的目标跟踪算法。提取方向梯度直方图特征、浅层特征及中层特征进行融合,提升物体外观模型的表达能力;通过显著性检测算法获得初始帧的显著感知参考权重,建立正则权重在相邻2帧之间的关联;最小化实际一致性响应与理想一致性响应之间的差异,约束一致性水平防止滤波器模板退化;提出一种动态约束策略,进一步提高跟踪器在复杂场景下的适应性。在OTB2015、TempleColor128和UAV20L公开数据集上对所提算法进行测试,实验结果表明:相比于SRDCF算法,所提算法在OTB2015数据集上距离精度提高了0.108,AUC提高了0.077,速度为22.41帧/s,实时性较好。

关键词：机器视觉目标跟踪相关滤波显著感知一致性约束

在线全文

学校读者我要写书评

暂无评论

改进奇异值分解的海杂波抑制算法

西安电子科技大学学报 2023年第2期50卷 188-196页

作者：国强陈佳甜戚连刚 CHORNOGOR leonid 哈尔滨工程大学信息与通信工程学院黑龙江哈尔滨150001 哈尔滨工程大学先进船舶通信与信息技术工业和信息化部重点实验室黑龙江哈尔滨150001 哈尔滨工程大学物理与光电工程学院黑龙江哈尔滨150001 乌克兰哈尔科夫国立大学空间无线电物理系乌克兰哈尔科夫61022

针对强海杂波背景下海面运动目标回波信号难以检测的问题,提出了一种奇异值分解和双延迟线对消算法相结合的海杂波抑制算法。首先将脉冲压缩后的目标回波信号按周期重排成快慢时间维度矩阵,进行周期奇异值分解;然后构造出信号所对应奇... 详细信息

针对强海杂波背景下海面运动目标回波信号难以检测的问题,提出了一种奇异值分解和双延迟线对消算法相结合的海杂波抑制算法。首先将脉冲压缩后的目标回波信号按周期重排成快慢时间维度矩阵,进行周期奇异值分解;然后构造出信号所对应奇异值的阈值和输入信杂噪比的关系,利用阈值对奇异值指数比进行判决,实现自适应区分海杂波和目标信号;最后对重构后的目标信号进行双延迟线对消,抑制杂波的同时确保目标信号的损失降到最低。采用实测数据对算法性能进行实验验证,相比于现有的海杂波抑制算法,所提方法能够适应目标回波序列信杂噪比的变化,在输入信杂噪比为-30 dB下仍能抑制大部分杂波并准确检测信号,由此验证了新算法具有更好的抑制效果和更优的检测性能。

关键词：目标检测海杂波杂波抑制奇异值分解双延迟线对消算法

维普期刊数据库博看期刊

Affective Meaning of Pronouns in a Russian Sample

在线全文

学校读者我要写书评

暂无评论

Journal of Literature and Art Studies 2016年第9期6卷 1042-1055页

作者： leonid Dorfman Perm State Institute of Culture Penn Russia

The present study examines affective meaning of pronouns （in Russian） represented by the semantic differential. Of direct relevance to the present study is the theory of affective meaning propounded by Osgood. Two hypotheses were tested. According to a ＂magnitude＂ hypothesis, affective dimensions （each of evaluation, potency, and activity taken separately） differ in their magnitude across pronouns I, My, Me, and They. A ＂structural＂ hypothesis stated that the affective dimensions yield latent factors across （the generality） and within （the concept-scale interaction） the pronoun concepts. Repeated-measures analysis of variance （1-way ANOVA） and confirmatory factor analysis were employed to process data. It was found that each of the evaluation and potency measures yield a significant magnitude change across the pronouns, but there was indicated no significant change across the pronouns with respect to the activity dimension. Therewith, the pronoun My gained a salient value and the pronoun They the smallest value. Using confirmatory factor analysis five models were tested. Among them one model was good fit to the data. It engaged a four-factor solution resulted in that four pronouns are latent affective distinct but related factors and the evaluation, potency, and activity are their indicators.

关键词： personal pronouns affective meaning semantic differential generality concept-scale interaction

Space-Time Properties as Quantum Effects. Restrictions Imposed by Grothendieck’s Scheme Theory

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Modern Physics 2019年第7期10卷 795-823页

作者： leonid Lutsev Ioffe Physical-Technical Institute Russian Academy of Sciences St. Petersburg Russia

In this paper we consider properties of the four-dimensional space-time manifold M caused by the proposition that, according to the scheme theory, the manifold M is locally isomorphic to the spectrum of the algebra A, M ≅Spec (A), where A is the commutative algebra of distributions of quantum-field densities. Points of the manifold M are defined as maximal ideals of density distributions. In order to determine the algebra A, it is necessary to define multiplication on densities and to eliminate those densities, which cannot be multiplied. This leads to essential restrictions imposed on densities and on space-time properties. It is found that the only possible case, when the commutative algebra A exists, is the case, when the quantum fields are in the space-time manifold M with the structure group SO (3, 1) (Lorentz group). The algebra A consists of distributions of densities with singularities in the closed future light cone subset. On account of the local isomorphism M ≅Spec (A) , the quantum fields exist only in the space-time manifold with the one-dimensional arrow of time. In the fermion sector the restrictions caused by the possibility to define the multiplication on the densities of spinor fields can explain the chirality violation. It is found that for bosons in the Higgs sector the charge conjugation symmetry violation on the densities of states can be observed. This symmetry violation can explain the matter-antimatter imbalance. It is found that in theoretical models with non-abelian gauge fields instanton distributions are impossible and tunneling effects between different topological vacua | n> do not occur. Diagram expansion with respect to the -algebra variables is considered.

关键词： Space-Time Properties Quantum Field Arrow of Time Chirality Algebra of Distributions Symmetry Violation

Steady Characteristics of the Water-Lubricated Conical Bearings

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Donghua University(English Edition) 2012年第2期29卷 115-122页

作者：李胜波敖宏瑞姜洪源 KORNEEV Andrey Yurievich SAVIN leonid Alexeevich School of Mechatronics Engineering Harbin Institute of Technology School of Mechanical Engineering Heilongjiang Institute of Science and Technology Department of New Technologies and Automation of Production Orel State Technical University

The water-lubricated conical bearing has attracted attentions of researchers for its simple structure, easily adjusted gap （fdm thickness ）, lower friction loss, and less pollution in application. A mathematic model with consideration of the effects of turbulence, two-phase flow, and temperature on the pressure field at bearing surface is proposed here. Using this model, the Reynolds＇ equation and energy equation are solved in which the thermo- physical properties of the water as lubricant are taken into account. The dependency of characteristics of bearing, such as load-earrying capacity, flow rate （pumping losses ）, and frictional losses, on angular velocity, conical angle, and radial eccentricities, is presented. The research results are beneficial to the improvement of the efficiency of conical bearing and the environmental protection.

关键词： water-lubricated conical bearing hybrid conical bearing load-carrying capacity flow rate: frictional and DumDine losses

Animal Radioecology in the Exclusion Zone Since the Chernobyl Catastrophe

在线全文

学校读者我要写书评

暂无评论

Zoological Research 2006年第6期27卷 647-655页

作者： leonid Frantsevich Schmalhausen-Institute of Zoology

We review 20 year long investigations by the Schmalhausen Institute of Zoology on radioecological and ecological consequences of the Chernobyl catastrophe for wild animals in the Exclusion Zone （EZ） around the nuclear plant. Using previous observations on bird migrations through Ukraine, we assessed the 137^Cs and 90^Sr carry-out with migrants from the EZ. In addition, we selected animal species as standard indicators of the state of the environment to map ： 1 ） contamination of vertebrates with 137^Cs in the EZ and 2） beta-activity of mollusc shells indicating 90^Sr, in the whole Dnieper drainage area, in the Kiev Administrative Region, and in the EZ. We revealed regular seasonal and long-term trends, relative radionuclide accumulation by different species, transfer and accumulation factors, and used these measurements to diminish the enormous variation and complexity of the data. Secondary ecological changes in forest, devastated by direct irradiation, were caused by the crash of trophic chains and an outbreak of insect pests on dead or sick trees. Ninety-nine percent of the EZ area was not affected directly by irradiation. Ecological changes in this area have been caused by evacuation of the public, cessation of agriculture and forest management, and decontamination on a large scale. After initial changes, animal density and distribution have been stabilized at a limit restricted by natural resources, predators and poachers. A herd of Przewalski horses was successfully introduced into the EZ years ago. We renewed the protected state of nature reserved sites, which existed before, and proposed to expand the area of nature reservation.

关键词： Chernobyl catastrophe Radioecology Bioindication

Fluorescence color diversity of great barrier reef corals

在线全文

学校读者我要写书评

暂无评论

Journal of Innovative Optical Health Sciences 2015年第4期8卷 58-68页

作者： Grigory Lapshin Anya Salih Peter Kolosov Maria Golovkina Yuri Zavorotnyi Tatyana Ivashina leonid Vinokurov Victor Bagratashvili Alexander Savitsky Physical Biochemistry Lab INBI RASLeninsky Prospekt 33Build.2 Moscow 119071Russia Faculty of Bioengineering and Bioinformatics Moscow State University Leninskiye Gory 1-73 MSU GSP-1 Moscow 119991Russia Confocal Bio-Imaging Facility(CBIF) Division Deputy Vice-Chancellor(Research&Development)University of Western SydneyLocked Bag 1797 Penrith South DCNSW 1797Australia Institute of Higher Nervous Activity and Neurophysiology The Russian Academy of Sciences 5A Butlerova St.Moscow 117485Russia Skobeltsyn Institute of Nuclear Physics Moscow State University 1(2)Leninskie Gory GSP-1Moscow 119991Russia Molecular Microbiology Lab Skryabin Institute of Biochemistry and Physiology of Micro-organisms RAS Prospect Nauki 5 Pushchino142290 Moscow RegionRussia Group of Bioengineering of Reporter Proteins Branch of the Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences Prospekt Nauki 65 Pushchino 142290 Moscow RegionRussia Institute of Laser and Information Technologies RAS 2 Pionerskaya TroitskMoscow 142190Russia

A group of variously colored proteins belonging to the green fAuorescent protein(GFP)family are responsible for coloring coral *** of the Great Barrier Reef were studied with the custom-built fiber laser fluorescence *** analysis showed that most of the excarmined corals contained multiple fuorescent peaks ranging from 470 to *** obser-vation was attributed to the presence of multiple genes of GFP-like proteins in a single coral,as well as by the photo-induced post-translational modifcations of certain GFP-like *** isolated a novel photo-convertible fuorescent protein(FP)from one of the tested ***:propose that two processes may explain the observed diversity of the fuorescent spectra in corals:(1)dark post-translational modifcation(maturation),and(2)color photo-conversion of certain maturated proteins in response to sunlight.

关键词： Coral fuorescence GFP like proteins fuorophores Kaede

Hydrochemistry of Salt Lakes in Southeastern Transbaikalia(Russia) in the Time of Arid Phase of Climate Change at the Beginning of the XXI Century

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2014年第S1期88卷 36-38页

作者： leonid V.ZAMANA Irina L.VAKHNINA Institute of Natural Resources Cryology and Ecology Siberian Branch of RAS

1 Introduction In the south of Eastern Transbaikalia in the border area with China and Mongolia,there are at least 300 saline without outlet *** are confined to the semi-arid zone Daurian steppes with pronounced continental salinization processes and are mostly located on the bottoms of the intermountain *** origin is related to evaporative concentration of fresh waters lakes filling.

关键词： salt lakes chemical composition salinity of water sulfate reduction.