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Approach to the Theoretical Strength of Ti—Ni—Cu Alloy Nanocrystals by Grain Boundary Design

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Journal of materials Science & Technology 2015年第1期31卷 91-96页

作者： Alexandr m.Glezer Nadezhda A.Shurygina Elena N.Blinova Inga E.Permyakova sergey A.Firstov Bardin Central Research Institute for the Iron and Steel Industry Vtoraya Baumanskaya ul.9/23Moscow 105005Russia moscow State University of Instrumental Engineering and Information Science(mGUPI) Moscow 107996Russia National University of Science and Technology(mISIS) Moscow 119049Russia Frantsevich Institute of materials Science Problems National Academy of Sciences of Ukraineul.Krzhizhanovskogo 3Kiev03680Ukraine

The grain boundary design was used to introduce boride Ti2B and TiB2nanoparticles of 5 nm in size into grain boundaries of nanocrystalline *** a result,the maximum normalized microhardness was increased by 20%and the theoretical limit of hardness is substantially *** is proposed that boride nanoparticles suppressed low-temperature grain-boundary sliding and,therefore,shifted the range of the anomalous behavior of Hall-Petch relation toward smaller sizes of the Ti-Ni-Cu nanocrystals.

关键词： Electron microscopy microhardness Nanocrystal Nano

Efficient network immunization under limited knowledge

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National Science Review 2021年第1期8卷 127-134页

作者： Yangyang Liu Hillel Sanhedrai Gao Gao Dong Louis m.Shekhtman Fan Wang sergey V.Buldyrev Shlomo Havlin Department of Systems Science National University of Defense Technology Department of Physics Bar-Ilan University Faculty of Science Jiangsu University Network Science Institute Northeastern University Department of Physics Yeshiva University

Targeted immunization of centralized nodes in large-scale networks has attracted significant ***, in real-world scenarios, knowledge and observations of the network may be limited, thereby precluding a full assessment of the optimal nodes to immunize（or quarantine） in order to avoid epidemic spreading such as that of the current coronavirus disease（COVID-19） epidemic. Here, we study a novel immunization strategy where only n nodes are observed at a time and the most central among these n nodes is immunized. This process can globally immunize a network. We find that even for small n（≈10） there is significant improvement in the immunization（quarantine）, which is very close to the levels of immunization with full knowledge. We develop an analytical framework for our method and determine the critical percolation threshold p;and the size of the giant component P∞ for networks with arbitrary degree distributions P（k）. In the limit of n →∞ we recover prior work on targeted immunization, whereas for n = 1 we recover the known case of random immunization. Between these two extremes, we observe that, as n increases,p;increases quickly towards its optimal value under targeted immunization with complete information. In particular, we find a new general scaling relationship between |p;（∞）-p;（n）| and n as |p;（∞）-p;（n）| ～n;exp（-αn）. For scale-free（SF） networks, where P（k）～ k;, 2 m zero to nonzero when n increases from n = 1 to O（log N）(where N is the size of the network). Thus, for SF networks, having knowledge of ≈log N nodes and immunizing the most optimal among them can dramatically reduce epidemic spreading. We also demonstrate our limited knowledge immunization strategy on several real-world networks and confirm that in these real networks, p;increases significantly even for small n.

关键词： percolation complex networks network immunization critical phenomena

单孔经腹膜后入路行保留左结肠动脉的乙状结肠癌根治术(附视频)

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中华结直肠疾病电子杂志 2024年第2期13卷 166-170页

作者：谢尔盖·叶菲托夫曹宇关旭刘正波琳娜·帕诺娃王锡山俄罗斯莫斯科国立谢东诺夫第一医科大学第二学院外科莫斯科119991 国家癌症中心/国家肿瘤临床医学研究中心/中国医学科学院北京协和医学院肿瘤医院结直肠外科北京100021 中国医学科学院肿瘤医院山西医院/山西省肿瘤医院/山西医科大学附属肿瘤医院结直肠外科太原030013

随着腹腔镜手术技术在结直肠癌手术中的应用日臻成熟,其操作精度高、术后恢复快,深受外科医生青睐。但面对肥胖或腹腔严重粘连的患者,常规腹腔镜入路则变得尤为困难。对于这类患者,寻求一种更安全有效的入路显得极为重要。目前,尚无腹... 详细信息

随着腹腔镜手术技术在结直肠癌手术中的应用日臻成熟,其操作精度高、术后恢复快,深受外科医生青睐。但面对肥胖或腹腔严重粘连的患者,常规腹腔镜入路则变得尤为困难。对于这类患者,寻求一种更安全有效的入路显得极为重要。目前,尚无腹膜后入路治疗乙状结肠癌的报告。本例报告1例对乙状结肠癌女性患者成功经腹膜后入路,行保留左结肠动脉的D3淋巴结清扫术。

关键词：结肠肿瘤腹膜后入路 D3淋巴结清扫腹腔镜

Application of aluminum foil for “strain sensing” at fatigue damage evaluation of carbon fiber composite

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中国科学：物理学、力学、天文学英文版 2014年第1期57卷 59-64页

作者： PANIN sergey BURKOV mikhail LYUBUTIN Pavel ALTUKHOV Yurii Laboratory of Polymer Composite materials Institute of Strength Physics and Material Science 634021 Akademicheskii avenue 2/4Tomsk Russia National Research Tomsk Polytechnic University 634050 Lenina avenue 30 office 127 Tomsk Russia

Surface layer of a loaded solid is an individual structural level of deformation that was shown numerously within concept of physical *** gives rise to advance in its deformation development under loading as well as allows using this phenomenon to sense the strain induced structure *** is of specific importance for composite materials since they are highly heterogeneous while estimating their mechanical state is a topical applied *** tests of carbon fiber composite specimens were carried out for cyclic deformation estimation with the use of strain sensors made of thin(80μm)aluminum foil glued to the specimen’s *** surface images were captured by DSLR camera mounted onto an optical *** relief to form during cyclic loading was numerically estimated using different parameters:dispersion,mean square error,universal image quality index,fractal dimension and energy of Fourier *** results are discussed in view of deformation mismatch in thin foil and bulk specimen and are offered to be applied for the development of Structural Health monitoring(SHm)approach.

关键词：碳纤维复合材料应变传感器疲劳试验应用损伤评估铝箔物理细观力学循环变形

2022年青海门源mw 6.6地震的发震断层及孕震构造模式

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科学通报 2023年第2期68卷 254-270页

作者：冯万鹏何骁慧张逸鹏房立华 sergey Samsonov 张培震中山大学地球科学与工程学院广东省地球动力作用与地质灾害重点实验室珠海519000 南方海洋科学与工程广东省实验室(珠海) 珠海519000 中国地震局地球物理研究所北京100081 Canada Center for mapping and Earth Observations Natural Resources CanadaOttawa ON K1A0G1Canada

2022年1月8日青海门源盆地北缘发生mw 6.6地震,震源机制反演表明此次地震属于左旋走滑事件.震后10 d内,近600个余震被检测到,最大余震为m 5.1级.此次地震发生在祁连-海原左旋走滑断裂系统的冷龙岭段,该断裂段全长127 km,由古地震研究确... 详细信息

2022年1月8日青海门源盆地北缘发生mw 6.6地震,震源机制反演表明此次地震属于左旋走滑事件.震后10 d内,近600个余震被检测到,最大余震为m 5.1级.此次地震发生在祁连-海原左旋走滑断裂系统的冷龙岭段,该断裂段全长127 km,由古地震研究确定的特征地震大小在mw 7.3~7.5.为了更为全面理解此次地震的震源机制以及当地孕震模式,我们分析了地震波形,获取了主震和17个ms≥3.0余震的震源机制与矩心深度.利用升、降轨道SAR数据获取的像元偏移数据和同震干涉相位(interferometric synthetic aperture radar,InSAR)确定了两条地表破裂带的位置,并利用InSAR数据反演了主震的滑动模型.研究发现,此次地震破裂带对应于冷龙岭断裂西段和托莱山断裂的阶区,发震断层存在3个形变中心,最大滑动量约为4 m,出现在冷龙岭断裂上,形变中心深度为4 km.滑动模型显示释放了累计能量~1.58×1019 Nm,约合矩震级mw 6.68,与本文利用地震学方法得到的mw 6.58接近.结合区域活动构造特征、1986和2016年两次门源地震的位置及震源机制,推断祁连-海原断裂非对称花状构造结构可能是祁连山地区一种重要的应变卸载模式.同震滑动驱动下的库仑应力变化分析显示72.2%的余震分布符合同震触发效应.考虑到当前余震主要向东南扩展,库仑应力升高的破裂区西南部仍存在相对较高的地震风险,需要进一步关注.

关键词：门源地震冷龙岭断裂震源机制花状构造同震形变

The Confirmed Validity of the Explanatory Aspect of the Thermohydrogravidynamic Theory Concerning the Evaluated maximal magnitude of the Strongest Earthquake of the Earth near the Predicted Date 2021.1 AD during the Range from October 27, 2020 to may 17, 2

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The Confirmed Validity of the Explanatory Aspect of the Ther...

Economic Dispatch Considering Hourly Capacity Allocation with a Variable Renewable and Hydro-Based Generation Portfolio

作者： sergey V.Simonenko V.I.Il’ichev Pacific Oceanological Institute Far Eastern Branch of Russian Academy of Sciences

We present the explanation(in the frame of the established thermohydrogravidynamic technology) of the maximal magnitude m = 8.1(according to the U.S. Geological Survey) of the strongest earthquake of the Earth occurred in Kermadec Islands, New Zealand on march 4, 2021 AD(during the considered range from October 27, 2020 to may 17, 2021 AD). This strongest earthquake occurred near the calculated date 2021.1 AD corresponding(in the frame of the thermohydrogravidynamic theory) to the local maximal combined planetary and solar integral energy gravitational influence on the internal rigid core of the Earth. To obtain this explanation, we have analyzed the strongest earthquakes of the Earth(according to the U.S. Geological Survey) occurred near the dates of the local maximal combined planetary and solar integral energy gravitational influences on the internal rigid core of the Earth.

关键词： Thermohydrogravidynamic Theory Non-Stationary Cosmic Gravitation Generalized First Law of Thermodynamics Cosmic Geology Cosmic Geophysics Cosmic Seismology Global Seismotectonic Processes Global Prediction Thermohydrogravidynamic Principles Thermohydrogravidynamic Technology

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Energy and Power Engineering 2022年第10期14卷 594-614页

作者： Roney N. Vitorino Dorel S. Ramos Karen Tapia-Ahumada sergey Paltsev John m. Reilly Energy Research Office Rio de Janeiro Brazil Polytechnic School University of Sao Paulo Sao Paulo Brazil massachusetts Institute of Technology Cambridge USA

The objective of this paper is to assess an economic dispatch considering a power system portfolio, which includes predominant amount of hydro power and increasing quantities of intermittent renewables in relation to the total electric capacity. With growing importance of intermittent wind and solar generation taking part into power systems worldwide, there is need for greater chronological resolution to estimate the flexibility of the power system to offer firm capacity. In this way, a linear optimization model operating hourly is developed to calculate the minimum power system cost, while stablishing the capacity allocation to meet the projected load throughout one-year simulation, as an estimation of how the hourly economic dispatch impacts the scheduling of generators belonging to a power system with this portfolio composition. A central focus is how to operate the available hydro capacity to back up intermittent renewables, evaluating the physical hydro operating constraints, monthly energy balance and maximum power availability. A case study was simulated based on the Brazil’s power system configuration, showing that existing hydro capacity provide hourly flexibility to back-up intermittent renewables, potentially saving 1.2 Billion R$, about 3.6% of total system cost referred to 2019. It is worthwhile to realize that the developed methodology can be employed to other power systems with similar capacity portfolio structure for the purpose of calculating its optimum allocation for a specified region and target year.

关键词： Economic Dispatch Energy Planning Operation Flexibility Power System Transmission System Variable Renewable Energy

Numerical method for axial motion artifact correction in retinal spectral-domain optical coherence tomography

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Frontiers of Optoelectronics 2020年第4期13卷 393-401页

作者： sergey Yu.KSENOFONTOV Pavel A.SHILYAGIN Dmitry A.TERPELOV Valentin m.GELIKONOV Grigory V.GELIKONOV BiomedTech Lie Nizhny Novgorod 603155Russia Institute of Applied Physics of the Russian Academy of Science Nizhny Novgorod 603950Russia

A numerical method that compensates image distortions caused by random fluctuations of the distance to an object in spectral-domain optical coherence tomography(SD OCT)has been proposed and verified *** proposed method is based on the analysis of the phase shifts between adjacent scans that are caused by micrometer-scale displacements and the subsequent compensation for the displacements through phase-frequency correction in the spectral *** efficiency of the method is demonstrated in model experiments with harmonic and random movements of a scattering object as well as during in vivo imaging of the retina of the human eye.

关键词： optical coherence tomography(OCT) motion artifact correction retinal imaging numerical method

Immune Profile of COVID-19 Survivors and Contacts During 9 months:A Cohort Study

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Infectious Diseases & Immunity 2023年第4期3卷 163-175页

作者： Valentina V.Tatarnikova Natalya O.Kiseleva Valentina I.Dubrovina Vladimir A.Vishnyakov Darya D.Bryukhova Anna B.Pyatidesyatnikova Konstantin m.Korytov munko B.Sharakshanov sergey V.Balakhonov Irkutsk Antiplague Research Institute of Siberia and Far East of Rospotrebnadzor Irkutsk 664047Russia

Background:Severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)causes a multi-organ systemic damage that can lead to long-term *** is known about the possible long-term effects of COVID-19 on circulating leukocyte kinetics and functional T-cell activity after *** investigate immune system changes,we designed a cohort ***:Volunteer screening and sample collectionwere performed at the Irkutsk Research Anti-Plague Institute of ***-four volunteers who have had COVID-19(recovered volunteers(RVs))betweenmay 2020 andmay 2021,33 volunteers who had been in contact with COVID-19 patients(contact volunteers(CVs))within the family setting but had not become ill,and 47 healthy volunteers(HVs)participated in the *** performed immunophenotyping of peripheral blood cells using flow *** was tested for SARS-CoV-2 anti-nucleocapsid immunoglobulin G antibodies by enzyme-linked immunosorbent assay(Ab(+),people with specific anti-N antibodies to SARS-CoV-2;Ab(−),people without specific antibodies).Results:There were no serious disturbances in the internal environment of the body in RVs and *** the evaluation of the general state of the immune system,the most informative indicator was the index of the ratio of neutrophils to bloodmonocytes–decreased on the 1st terms of observation(1 and 3 months post-symptom onset(PSO)/post-contact onset(PCO)),on average,1.3 times compared with HVs(8.6%(7.5%–10.5%),Pmonth of *** of the cells responsible for the development of the adaptive immune response was noted only in RVs–increased B-lymphocyte content(HVs,9.1%(6.4%–10.2%))and immunoregulatory index ratio(HVs,1.6%(1.2%–2.1%))due to redistribution of T-helper and cytotoxic T cells throughout the follow-up period by an average of 1.2-fold compared with HVs(P<0.05).However,CVs with specific antibodies to SARS-CoV-2 N-protein also had an increased proportion of CD3−CD19+c

关键词： COVID-19 Flow cytometry Immunity Specific IgG T cells B cells