支持向量分类机LIBSVM方法识别天然地震、爆破与塌陷   总被引：1，自引：0，他引：1  

范晓易  曲均浩  曲保安  刘方斌  山长仑  周少辉 《大地测量与地球动力学》2019,39(9):916-918

对天然地震、爆破及塌陷的波形数据进行小波变换,并用小波转换系数提取香农熵特征,采用支持向量分类机LIBSVM多类模式识别方法对香农熵特征进行分类识别,识别率在80%~95%之间。结果表明,采用LIBSVM对波形特征进行分类的方法可以较好地识别天然地震、爆破与塌陷。  相似文献   

基于高速公路流的东北大都市区边界识别与结构特征研究   总被引：2，自引：2，他引：0  

陈卓  金凤君  王姣娥 《地理科学》2019,39(6):929-937

利用高速公路收费站数据分析东北大都市区的空间边界与中心-外围结构特征。研究发现,① 中心城市高速公路流随距离的分布符合距离衰减规律,随规模位序的累积分布符合“二八定律”,但在具体的指标阈值上却表现出显著差异。② 四大都市区在空间上相连,以较小的国土面积承载了区域主要的社会经济活动。沈阳都市区和大连都市区在城镇关联体系中已实现融合;沈阳都市区、长春都市区、哈尔滨都市区间的空间联系则相对松散。③ 高速公路流空间下,各大都市区中心-外围空间结构表现出空间圈层、功能廊道和边界切割的典型特征。  相似文献   

Dynamics of Accumulative Coasts in Enclosed Bays of Antarctica (with an Example of the Key Area of the South Georgia Microcontinent)     

Dunaev  N. N.  Leont’yev  I. O. 《Oceanology》2019,59(2):242-246

Oceanology - The object of direct study is the accumulative coast of King Edward Bay on the island of South Georgia of the Antarctic microcontinent of the same name. Neotectonic uplift of the...  相似文献   

Rhythmic Patterns in the Shoreline Contour of the Gulf of Terpenya,Sakhalin Island     

Leont’yev  I. O.  Afanasiev  V. V.  Uba  A. V. 《Oceanology》2019,59(3):451-459

Oceanology - The paper considers the results of long-term observations of megacusp (large-scale shoreline cusps) on the coast of the Gulf of Terpenya (Gulf of Patience), Sakhalin Island. The...  相似文献   

Russian Studies of Atmospheric Electricity in 2015–2018     

Mareev  E. A.  Stasenko  V. N.  Shatalina  M. V.  Dement’eva  S. O.  Evtushenko  A. A.  Svechnikova  E. K.  Slyunyayev  N. N. 《Izvestiya Atmospheric and Oceanic Physics》2019,55(6):562-572

Izvestiya, Atmospheric and Oceanic Physics - The most significant results of Russian studies in the field of atmospheric electricity in 2015–2018 are reviewed. The review is a part of the...  相似文献   

A Semianalytical Method for Constructing Nearly Equatorial Orbits of Hypothetical Satellites of Asteroids with an Almost Spheroidal Shape     

Vashkov’yak  M. A. 《Solar System Research》2019,53(2):116-123

Solar System Research - The problem of the motion of a particle with a negligible mass (satellite) near the equatorial plane of a spheroidal body, in particular, an asteroid, is considered. To a...  相似文献   

Warming hiatus and evergreen conifers in Altay-Sayan Region,Siberia     

Viacheslav I. Kharuk  Sergei T. Im  Il’ya A. Petrov 《山地科学学报》2018,15(12):2579-2589

"Warming hiatus" occurred in the AltaySayan Mountain Region, Siberia in c. 1997–2014. We analyzed evergreen conifer(EGC) stands area(satellite data) and trees(Siberian pine, Pinus sibirica Du Tour, Siberian fir, Abies sibirica Ledeb.) growth increment(dendrochronology data) response to climate variables before and during the hiatus. During the hiatus, EGC area increased in the highlands(1000 m)(+30%), whereas at low and middle elevations(1000 m. a.s.l.) the EGC area decreased(-7%). The EGC area increase was observed on the rain-ward northwest slopes mainly. In highlands, EGC area increase mainly correlated with summer air temperature, whereas at low and middle elevations EGC area decrease correlated with drought index SPEI and vapor pressure deficit(VPD). EGC mortality(fir and Siberian pine) in lowland was caused by the synergy of water stress(inciting factor) and barkbeetle attacks(contributing factor). Tree growth increment(GI) dynamics differs with respect to elevation. At high elevation(1700 m) GI permanently increased since warming onset, whereas at the middle(900 m) and low elevations(450 m) GI increased until c. 1983 yr. with followed depression. That GI "breakpoint" occurred about a decade before hiatus onset. In spite of growth depression, during hiatus GI was higher than that in pre-warming period. At high elevation, GI positively responded to elevated June temperatures and negatively to moisture increase(precipitation, root zone moisture content, VPD, and SPEI). At low elevation GI negatively responded to June temperatures and positively to moisture increase. For both, low and high elevation, these patterns persisted throughout the study period(1967–2014). On the contrary, at middle elevations GI dependence on climate variables switch after breakpoint year(1983). Before breakpoint, June air temperature(positive correlation) and moisture(negative correlations) controlled GI. Further temperature increase leads GI depression and switched correlation signs to opposite(from positive to negative with temperature, and from negative to positive with moisture variables).  相似文献   

Comprehensive Research of the Coastal Water Area of the Sea of Japan and Sea of Okhotsk under the Influence of River Runoff (Cruise 71 of the R/V <Emphasis Type="Italic">Professor Gagarinskii</Emphasis>)     

P. Ya. Tishchenko  V. B. Lobanov  V. M. Shul’kin  V. V. Mel’nikov  I. B. Tsoi  P. Yu. Semkin  P. P. Tishchenko  V. A. Bannov  O. V. Belous  L. E. Vasil’eva  O. A. Elovskaya  S. G. Sagalaev  Yu. V. Fedorets 《Oceanology》2018,58(2):325-327

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On Traces of Strong Late Medieval Earthquakes at the Uzbek Madrasah–Mosque Complex,Staryi Krym,Crimea     

A. M. Korzhenkov  D. A. Lomakin  A. N. Ovsyuchenko  A. S. Lar’kov  A. V. Marakhanov  E. A. Rogozhin 《Izvestiya Atmospheric and Oceanic Physics》2018,54(7):627-645

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Long-term oscillations of sunspots and a special class of artifacts in SOHO/MDI and SDO/HMI data     

V. I. Efremov  A. A. Solov’ev  L. D. Parfinenko  A. Riehokainen  E. Kirichek  V. V. Smirnova  Y. N. Varun  I. Bakunina  I. Zhivanovich 《Astrophysics and Space Science》2018,363(3):61

A specific type of artifacts (named as “p2p”), that originate due to displacement of the image of a moving object along the digital (pixel) matrix of receiver are analyzed in detail. The criteria of appearance and the influence of these artifacts on the study of long-term oscillations of sunspots are deduced. The obtained criteria suggest us methods for reduction or even elimination of these artifacts. It is shown that the use of integral parameters can be very effective against the “p2p” artifact distortions. The simultaneous observations of sunspot magnetic field and ultraviolet intensity of the umbra have given the same periods for the long-term oscillations. In this way the real physical nature of the oscillatory process, which is independent of the artifacts have been confirmed again. A number of examples considered here confirm the dependence between the periods of main mode of the sunspot magnetic field long-term oscillations and its strength. The dependence was derived earlier from both the observations and the theoretical model of the shallow sunspot. The anti-phase behavior of time variations of sunspot umbra area and magnetic field of the sunspot demonstrates that the umbra of sunspot moves in long-term oscillations as a whole: all its points oscillate with the same phase.  相似文献