26,137 research outputs found
A new spectral representation of earthquake data: Hilbert spectral analysis of station TCU129, Chi-Chi, Taiwan, 21 September 1999
No full textAnalysis of Sonar targets by Teager-Huang Transform (THT)
Full text linkIn this paper, an approach for Sonar targets analysis based on a new energy-time-frequency representation, called
Teager-Huang Transform (THT), is presented. The THT is the combination of the empirical mode decomposition of Huang
and the Teager-Kaiser signal demodulation method. The THT is free of interferences and does not requires basis
functions for signals decomposition. The analysis is carried out, in free field, from the impulse responses of Sonar
targets. We compare the analysis results of impulse responses of spherical and cylindrical targets given by THT to those
of the smoothed Wigner-Ville transformation.Dans cet article, nous présentons une approche de l’analyse des échos de cibles Sonar basée sur une
nouvelle représentation temps-fréquence appelée Transformation de Huang Teager (THT). Cette méthode est
une combinaison de la décomposition modale empirique de Huang et de l’opérateur de démodulation de
Teager-Kaiser. Contrairement aux représentations temps-fréquence classiques, la THT ne présente pas
d’interférences et ne nécessite pas de fonctions de base pour la décomposition des signaux. L’analyse des
échos de cibles Sonar est réalisée à partir de leurs réponses impulsionnelles en champ libre. Nous comparons
les résultats d’analyse des réponses impulsionnelles de cibles sphériques et cylindriques de la THT à ceux de
la transformation de Wigner-Ville lissée
Dynamics of Network Formation Processes in the Co-Author Model
Full text linkThis article studies the dynamics in the formation processes of a mutual consent network in game theory setting: the Co-Author Model. In this article, a limited observation is applied and analytical results are derived. Then, 2 parameters are varied: the number of individuals in the network and the initial probability of the links in the network in its initial state. A simulation result shows a finding that is consistent with an analytical result for a state of equilibrium while it also shows different possible equilibria.Dynamics, Network, Game Theory, Model,Simulation, Equilibrium, Complexity
Plesioblattogryllus aristovi HUANG & NEL 2023, sp. nov.
No full textPlesioblattogryllus aristovi sp. nov. (Figs 1, 2) Material. Holotype NIGP201823 (a complete wing), housed in the Nanjing Institute of Geology and Palaeontology, Nanjing, China. Etymology. Named in honor of late Dr. Daniil S. Aristov, in recognition of his important contribution to palaeoentomology. Diagnosis. Space between stem of MA and first branch of RP broad; RP posterior branches distally forked; first RP fork located far distad MA origin; CuA1 with two main branches; PCu2 with five branches; wing very long and distinctly slender (wing 50 mm long, ratio wing length/width at apex of CuA = 4.13). Type locality and horizon. Xiayingzi locality of the Daohugou Village, Wuhua Township, Ningcheng County, Chifeng City, Inner Mongolia, NE China; Middle-Late Jurassic, very close to the Middle and Late Jurassic boundary. Description. Wing 48.5 mm long, 11.5 mm wide; anterior margin straight; costal area equal in width to subcostal area at base of RP and very slightly narrower than subcostal area in distal third of wing; costal area in distal half of wing with short and straight crossveins; ScP ending close to apex of RA; ScP, stem of R (i. e., R before its fork into RA and RP) and RA nearly straight; RA nearly aligned with stem of R; a secondary longitudinal vein emerging from R, remaining closely parallel to it, and ending at one third of wing length (after separation of RP), with crossveins present between this vein, ScP, and R respectively; base of RP in basal third of wing, well-separated from MA+CuA; RP posteriorly branched, with five main branches; base of M appressed to that of R but probably free; M fused with CuA (into M+CuA) very close to wing base; MA and MP branching-off CuA in separate stems; MA, MP and CuA1 forked; CuA2 simple; CuA forks into CuA1 and CuA2 immediately distad base of MP; CuP+(PCu1) simple and straight; PCu2 with five branches; anal vein weak and forked; last branch of PCu2 and first branches of anal vein curved apically; area between M+CuA and CuP+(PCu1) broad, with sigmoidal crossveins; plica prima anterior range about 45º with wing anterior margin, a net of irregular cells is visible posterior to the anal veins.Published as part of HUANG, DI-YING & NEL, ANDRÉ, 2023, A third species of Plesioblattogryllus Huang et al., 2008 discovered in the Middle- Upper Jurassic Daohugou Beds (Insecta: Plesioblattogryllidae), pp. 191-197 in Palaeoentomology 6 (2) on page 192, DOI: 10.11646/palaeoentomology.6.2.10, http://zenodo.org/record/792891
Examination of the financial and economic impact US exchange rate volatility has on fixed income securities for Chinese investors
No full textBetween desert and forest: the Holocene savannas of NE-Nigeria
No full textNumerous ecologists postulate that West African savannas are mostly the result of degradation of formerly closed forests. This hypothesis can only be tested by palaeoecological investigations. The palynological results summarised in this paper document the history of the Sudanian and Sahelian savanna of NE-Nigeria during the last 11.500 years (uncal. BP). Both sites investigated provide evidence for the persistence of savanna throughout the entire Holocene. Patches of closed dry forest may have occurred, but never completely displaced the savanna vegetation. Humid conditions during the early and mid Holocene (from 10.000 BP onwards) caused a rapid spread of Guinean and Sudanian taxa into the northern vegetation zones. A slow return to drier climatic conditions between ca. 6800 BP and ca. 5500 BP can be recorded at both sites. Finally, between 3800 BP and 3300 BP a strong aridification resulted in the establishment of the modern vegetation zones. In both the Sahelian and Sudanian zone the vegetational changes appear to have been primarily controlled by climatic changes, whereas the effects of human activities remain palynologically silent even for the late Holocene
Tarika danieli Volynkin & Saldaitis & Černý & Huang 2023, sp. n.
No full text<i>Tarika danieli</i> sp. n. <p>(Figs 9, 10, 24–28, 37)</p> <p> <b>Type material</b>. <b>Holotype</b> (Figs 9, 24): male, [China, Yunnan, Lijiang] “Li-kiang ca. 2000m | Prov. Nord-Yuennan | 1.8. 1934 H. Höne ” / “♁” / “Tarica va- | rana Moore” / “Slide | ZSM Arct. | 2021-268♁ | A. Volynkin” (MWM / ZSM).</p> <p> <b>Paratypes</b>: <b>CHINA</b>: 1 male, 2 females, same locality and collector as holotype, but 5.VIII.1934 (male), 31.VII.1934, 14.VII.1934 (females), gen. prep. Nos.: ZSM Arct. 2021-266 (male), ZSM Arct. 2021-267, ZSM Arct. 2021-269 (females) (prepared by Volynkin) (MWM / ZSM); 24 males, 17 females, same locality and collector as holotype, but 31.VII.1934 (1 male, 1 female), 1.VIII.1934 (1 male), 2.VIII.1934 (2 males, 1 female), 4.VIII.1934 (1 male, 1 female), 5.VIII.1934 (8 males, 2 females), 6.VIII.1934 (3 males, 3 females), 7.VIII.1934 (2 males, 1 female), 8.VIII.1934 (1 male, 2 females), 9.VIII.1934 (1 male), 10.VIII.1934 (1 female), 12.VIII.1934 (1 female), 13.VIII.1934 (1 male, 1 female), 14.VIII.1934 (2 males), 15.VIII.1934 (1 male, 1 female), 18.VIII.1934 (2 females) (ZFMK); 7 males, 2 females, S Sichuan, Mts 20 km S Xichang, 3000m, 20–22.VII.2005, S. Murzin leg., gen. prep. Nos.: ZSM Arct. 2021-233 (male), ZSM Arct. 2021-234 (female) (MWM / ZSM); 1 male, [Fujian Prov., ca. 10 Km NNE of Shaowu] Kuatun, Prov. Fukien, 18.IX. Höne, ZFMK Lep153493, gen. prep. by Huang (ZFMK); 1 female, [Jiangsu Prov.] Lungtan b.[ei] Nanking, Prov. Kiangsu, 19.VI.[19]32, H. Höne, ZFMK Lep153492, gen. prep. by Huang (ZFMK).</p> <p> <b>Additional material examined</b>: <b>CHINA</b>: 1 male, [Shandong Prov.] Tai-Shan (Pr. Shantung), Gipfelhöhe [summit elevation] ca. 1550m, 14.V.1934, H. Höne, ZFMK Lep153491, gen. prep. by Huang (ZFMK).</p> <p> <b>Note</b>. The single male specimen from Shandong Province of China has the male genital capsule structure (Fig. 28) very similar to specimens from other populations but displays some differences in the phallus vesica. Compared to other specimens examined (Figs 24–27), it has shorter spiniform cornuti in the subbasal cluster, and a shorter distal diverticulum. The taxonomic value of these differences is unclear due to the lack of additional material from the north of East China therefore we tentatively assign this specimen with <i>T. danieli</i> <b>sp. n.</b> but do not include it in the type series.</p> <p> <b>Diagnosis</b>. The forewing length is 16.5–17.0 mm in males and 19.0–20.0 mm in females. The new species is superficially indistinguishable from <i>T. erlanga</i> <b>sp. n.</b> and <i>T. kinha</i> <b>sp. n.</b>, which also occur in South-West China. The male genital capsule of <i>T. danieli</i> <b>sp. n.</b> differs clearly from <i>T. erlanga</i> <b>sp. n.</b> in the robust, hook-shaped distal saccular process whereas it is basally swollen with a thin claw-shaped distal section in the congener. The vesica structure of <i>T. danieli</i> <b>sp. n.</b> differs from <i>T. erlanga</i> <b>sp. n.</b> in the markedly shorter spiniform cornuti in the subbasal cluster, and the bilobate medial diverticulum bearing a thorn-like cornutus on one of the lobes. The female genitalia of the new species are most similar to <i>T. kinha</i> <b>sp. n.</b>, the detailed comparison of the genitalia of both sexes of these species is provided below in the diagnosis of <i>T. kinha</i> <b>sp. n.</b></p> <p> <b>Distribution</b>. China (Yunnan, Sichuan, Fujian, Jiangsu and Shandong Provinces) (Daniel 1954, as <i>T. varana</i>).</p> <p> <b>Etymology</b>. The new species is named after Franz Daniel, a prominent German lepidopterist, who first reported and illustrated it from China as <i>T. varana</i>. The name is a noun in the genitive case.</p>Published as part of <i>Volynkin, Anton V., Saldaitis, Aidas, Černý, Karel & Huang, Si-Yao, 2023, Taxonomic review of the genus Tarika Moore with descriptions of six new species from Nepal, China and Indochina (Lepidoptera: Erebidae: Arctiinae), pp. 285-300 in Zootaxa 5258 (3)</i> on pages 289-290, DOI: 10.11646/zootaxa.5258.3.3, <a href="http://zenodo.org/record/7780233">http://zenodo.org/record/7780233</a>
Pselaphodes smetanai Huang & Yin, 2019, sp. nov.
No full textPselaphodes smetanai sp. nov. Figs 19A, 20 A-K Type material (1 specimen): Holotype; MHNG- ENTO-44078; ♂; NEPAL, ‘ NEPAL: Bagmati, Pokhare NE Barahbise, 2800 m, 3.5.81, Löbl - Smetana’ (MHNG). Type locality: Nepal, Sindhupalchok District, Pokhare NE Barahbise, 2800 m alt. Diagnosis of males: Length 2.90 mm. Antennomeres 9 with round projection at apex, antennomeres 10 with small projection at base. Metaventral processes long, with pair of small triangular projection in addition to long processes. Protrochanters with acute ventral spine, profemora with blunt ventral spine, protibiae with distinct spine at apex; mesotrochanters with two ventral spines, mesotibiae with small projection at apex. Median lobe of aedeagus slightly asymmetric and extending at apex; parameres elongate, narrowed at base and broadened at apex. Description: Male (Fig. 19A). Body reddish brown, BL 2.90 mm. Head slightly longer than wide, HL 0.62 mm, HW 0.61 mm; each eye composed of about 35 facets; with well-developed ocular canthus. Antennomeres (Fig. 20A) 9-11 forming distinct club, antennomeres 9 with round projection at apex, antennomeres 10 with small tubercle at base. Pronotum (Fig. 20B) longer than wide, PL 0.73 mm, PW 0.67 mm, rounded at anterolateral margins, constricted at apical third. Elytra wider than long, EL 0.61 mm, EW 1.25 mm. Metaventral processes (Fig. 20C) long, with pair of small triangular projection in addition to long processes. Protrochanters with acute ventral spine, profemora with large, blunt ventral spine (Fig. 20D), protibiae (Fig. 20E) with distinct spine at apex; mesotrochanters with two ventral spines (Fig. 20F), mesotibiae with small projection at apex (Fig. 20G); metatrochanters and metafemora (Fig. 20H) simple. Abdomen broad at base and narrowing apically, AL 0.94 mm, AW 1.32 mm. Length of aedeagus (Figs 20 I-K) 0.83 mm; median lobe distinctly narrowed and slightly asymmetric at apex; parameres elongate, almost symmetric, apically broadened; endophallus composed of one long and one short sclerite. Female. Unknown. Distribution: Nepal, Bagmati. Comparative notes: The new species belongs to the P. bagmatius species-group, and is most similar to P. psomus described above in sharing similar forms of the antennal clubs, and the median lobe of the aedeagus being strongly extending apically. These two species can be separated only based on the slightly different position of the apical process of antennomeres 9, the relatively shorter metaventral processes with a different form of the apex, and the shorter ventral spine of the profemora of the new species. Etymology: The new species is named after Ales Smetana, co-collector of the holotype.Published as part of Huang, Meng-Chi & Yin, Zi-Wei, 2019, The Pselaphodes (Coleoptera: Staphylinidae: Pselaphinae) of Nepal, pp. 165-196 in Revue suisse de Zoologie 126 (2) on pages 189-191, DOI: 10.5281/zenodo.346344
Ahlbergia Bryk
No full textGenus Ahlbergia Bryk 1. A. aleucopuncta Johnson, 1992 —Sichuan 2. A. arquata Johnson, 1992 — Uzbekistan, Kyrgyzstan 3. A. bimaculata Johnson, 1992 —Yunnan 4. A. caerulea Johnson, 1992 —S Gansu 5. A. caesius Johnson, 1992 —Sichuan 6. A. chalcidis Chou & Li, 1994 —Yunnan 7. A. chalybeia (Leech, 1893) —Hubei, Sichuan? = Novosatsuma cibdela Johnson, 1992 8 a. A. circe circe (Leech, 1893) —W Sichuan 8 b. A. circe montivaga Johnson, 1992 —Yunnan, S Sichuan = A. zhujianhuai Huang & Wu, 2003 9. A. clarolinea Huang & Chen, 2006 —Yunnan 10. A. collosa Johnson, 1992 —Gansu, Shaanxi 11. A. distincta Huang, 2003 — Yunnan (Nujiang only) 12. A. dongyui Huang & Zhan, 2006 —N Guangdong, Zhejiang, Jiangsu 13. A. ferrea (Butler, 1866) — Japan, Korea, Russia (Amur, Sakhalin), NE China = A. korea Johnson, 1992 14. A. frivaldszkyi (Lederer, 1855) — Kazakhstan, Russia (from Altai to Sakhalin), N Mongolia, Korea, China (Liaoning, Heilongjiang, Beijing, Tianjin, Hebei, Shanxi, Shaanxi, Gansu, Chongqing, Guizhou) = A. frivaldszkyi aquilonaria Johnson, 1992 15. A. haradai Igarashi, 1973 — Nepal 16. A. hsui Johnson, 2000 —S Gansu 17. A. inopinata Omelko, 1995 — Russia (Ussuri) 18. A. leechii (Niceville, 1893) —NE India, NW Yunnan 19. A. leechuanlungi Huang & Chen, 2005 —Fujian, Zhejiang, Anhui 20. A. leei Johnson, 1992 — China (Liaoning, Shaanxi), Korea, Russia (?) 21. A. liyufeii Huang & Zhou, 2014 —Shaanxi 22. A. luoliangi Huang & Song, 2006 —Shaanxi 23 a. A. lynda lynda Johnson, 1992 —Sichuan 23 b. A. lynda nidadana Huang, 2003 —Yunnan (Nujiang only) 24. A. maoweiweii Huang & Zhu, 2016 —Shaanxi 25. A. matusiki Johnson, 1992 —S Sichuan (Muli only) 26. A. nicevillei (Leech, 1893) —Hubei, Chongqing, Shaanxi, Guizhou, Hunan, Anhui, Zhejiang, Jiangsu, Fujian, Guangdong 27 a. A. pluto pluto (Leech, 1893) —Sichuan, Yunnan (except Nujiang), Guizhou? = A. pluto clarofacia Johnson, 1992 ? = A. clarofacia meridionalis Huang, 2003 27 b. A. pluto cyanus Johnson, 1992 —Yunnan (Nujiang only) 28. A. prodiga Johnson, 1992 —Yunnan 29 a. A. tricaudata tricaudata Johnson, 1992 —NE China (Liaoning), Russia (Ussuri) 29 b. A. tricaudata confusa Huang, Chen & Li, 2006 —Jiangsu, Fujian 30. A. unicolora Johnson, 1992 —YunnanPublished as part of Huang, Hao & Zhu, Jian-Qing, 2016, Ahlbergia maoweiweii sp. n. from Shaanxi, China with revisional notes on similar species (Lepidoptera: Lycaenidae), pp. 409-433 in Zootaxa 4114 (4) on pages 431-432, DOI: 10.11646/zootaxa.4114.4.3, http://zenodo.org/record/27160
Barsine karenkensis subsp. wushipheri Volynkin & Černý & Huang 2019, ssp. n.
No full textBarsine karenkensis wushipheri Volynkin & Černý, ssp. n. (Figs 96, 97, 195, 250) Type material. Holotype (Figs 96, 195): ♂, Taiwan, Prov. Kao-Hsiung, 15 km NE Taoyuan, 1850 m, 07.VII.1996, leg. G. Csorba et L. Németh, slide MWM 31441 (♂) Volynkin (Coll. MWM/ ZSM). Paratypes: 9 ♂, 4 ♀, same data as in the holotype (Coll. MWM/ ZSM); 17 ♂, 1 ♀, Taiwan, Prov. Ping-Tung, 10 km SE of Mutan, 470 m, 03–04.VII.1996, leg. G. Csorba et L. Németh, slide MWM 31442 (♀) Volynkin (Coll. MWM/ ZSM); 1 ♂, Taiwan, Prov. Nan-Tou, 15 km N of Puli, Uisun Forest Area, 500 m, 09–10.VII.1996, leg. G. Csorba et L. Németh (Coll. MWM/ ZSM). Diagnosis. Forewing length is 13.5–14 mm in males (14 mm in the holotype) and 14.5–15 mm in females. Barsine karenkensis wushipheri ssp. n. differs from the nominate subspecies by its bright yellow wing coloration and narrower discal spot of forewing. The genitalia of both sexes have no significant differences. Distribution. South Taiwan Isl.Published as part of Volynkin, Anton V., Černý, Karel & Huang, Si-Yao, 2019, A review of the Barsine hypoprepioides (Walker, 1862) species-group, with descriptions of fifteen new species and a new subspecies (Lepidoptera, Erebidae, Arctiinae), pp. 1-82 in Zootaxa 4618 (1) on page 23, DOI: 10.11646/zootaxa.4618.1.1, http://zenodo.org/record/324820
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