157,430 research outputs found
FIGURE 1 in New records and a new species of the cavernicolous genus Guiodytes Tian, 2013 from Guangxi, China (Coleoptera: Carabidae: Scaritinae)
No full textFIGURE 1. Distributional map of the genus Guiodytes Tian, 2013 (a. showing the location of Guangxi within China; square: G. b e d o s a e Tian; star: G. cavicola Tian; round: G. deharvengi n. sp.)Published as part of Tian, Mingyi, 2014, New records and a new species of the cavernicolous genus Guiodytes Tian, 2013 from Guangxi, China (Coleoptera: Carabidae: Scaritinae), pp. 355-362 in Zootaxa 3861 (4) on page 356, DOI: 10.11646/zootaxa.3861.4.5, http://zenodo.org/record/22532
Uenotrechus nandanensis Deuve et Tian 2010
No full textUenotrechus nandanensis Deuve et Tian, 2010, bona sp. (Figures 2, 4, 5e–f) Uenotrechus liboensis nandanensis Deuve et Tian, 2010: 101 (Type locality: Cave Dadongqiao Dong) Material examined. 2 males and 1 female (SCAU), 1 male (MNHN), the type series, labeled “ Cave Dadongqiao Dong, Encun, Nandan County, Guangxi, XII-27-2008, leg. Zhihong Xue, Wei Lin and Lei Gao ”. Diagnosis. Similar to U. liboensis Deuve et Tian, 1999, but head nearly parallel-sided, appendages slightly stouter, hind pronotal angles sharply rectangular, base of pronotum almost straight; furthermore, male aedeagus stouter, with a longer and markedly reflexed apical notch in lateral view, and distinctly constricted at subapex in dorsal view (Figs. 5e–f), versus slender aedeagus, with a rather short and less reflexed apical notch, and fairly broad at subapex in U. liboensis (Figs. 5a–d). Habitus as in Fig. 4. Distribution. China (Guangxi) (Fig. 2). Known only from Cave Dadongqiao Dong, Nandan County.Published as part of Wei, Guofu, Chen, Jujian & Tian, Mingyi, 2017, A review of the aphaenopsian ground beetle genus Uenotrechus Deuve et Tian, 1999 (Coleoptera: Carabidae: Trechinae), pp. 361-373 in Zootaxa 4282 (2) on pages 364-365, DOI: 10.11646/zootaxa.4282.2.9, http://zenodo.org/record/81874
Programme du log-modèle minimal analytique par flot de Ricci Kählérienne conique : programme Song-Tian
No full textL'existence de métrique canonique sur une variété projective était une conjecture de longue date et la majeure partie de cette conjecture est sur les variétés qui n'ont pas défini de première classe de Chern. Il existe un programme qui est connu comme le programme de Song-Tian, pour trouver une métrique canonique sur les modèles canoniques d'une variété projective avec la Programme de modèle Minimal analytique pour résoudre la partie restante de Calabi conjecture. Dans cette thèse, nous étendons le programme Song-Tian et donner une version logarithmiques de celui-ci. Nous étudions le flux de Kähler-Ricci conique qui peut être considéré comme la chirurgie analytique. Nous introduisons la notion de Weil-Petersson métrique logartithmique. Nous donnons une preuve courte de la formule de Gang Tian pour le potentiel Kähler de métrique Weil-Petersson logarithmique sur l'espace de modules des variétés de Log Calabi-Yau (si elle existe!) sur singularités coniques et Poincaré.Existence of canonical metric on a projective variety was a long standing conjecture and the major part of this conjecture is about varieties which do not have definite first Chern class(most of the manifolds do not have definite first Chern class). Thereis a program which is known as SongTian program for finding canonical metric on canonical model of a projective variety by using Minimal Model Program. The main aim of this thesis is better undrestanding of SongTian program on pair (X;D). In this thesis, we apply SongTian program for pair (X;D) via Log Minimal Model Program where D is a simple normal crossing divisor on X with conic singularities. We investigate conical Kähler Ricci flow on holomorphic fiber spaces (X;D) -→B whose generic fibers are log Calabi Yau pairs (Xs;Ds), c1(KB) 0 also). We show that there is a unique conical Kähler Einstein metric on (X;D) which is twisted by logarithmic Weil Petersson metric and an additional term which we will find it explicitly. We consider the semipositivity of fiberwise singular Kahler Einstein metric via SongTian program. We consider a twisted Kähler Einstein metric along Mori fibre space. Moreover, we give an analogue version of SongTian program for Sasakian manifolds. We give an arithmetic version of SongTian program for arithmetic varieties. Also we give a short proof of Tian’s formula for Kähler potential of logarithmic WeilPetersson metric on moduli space of log CalabiYau varieties (if such moduli space exists!)
Investigation of code reconfigurable fibre Bragg gratings for Optical Code Division Multiple Access (OCDMA) and Optical Packet Switching (OPS) Networks
No full textThis thesis documents my work in the telecommunication system laboratory at the Optoelectronics Research Centre, towards the implementation of code reconfigurable OCDMA and all-optical packet switching nodes based on fibre Bragg grating (FBG) technology. My research work involves characterizing the performance of various gratings, specifically high reflectivity, short chip duration, long code sequences, multiple phase level and tunable superstructured fiber Bragg gratings (SSFBGs), by using the recently proposed Frequency-Resolved Optical Gating technique based on Electro-Absorption Modulator (EAM-FROG). This technology can obtain the complex code profile along the grating, making it a powerful method to understand the thermally-induced code-reconfigurable grating. Efforts have been made to improve the grating design to achieve better system performance. Three different types of FBGs optical encoder/decoder, e.g. conventional discrete phaseshift SSFBGs, code-reconfigurable gratings, and novel continuous phase-shift SSFBGs, have been investigated comparatively, as well as their performance in various optical coding/decoding systems. This thesis also discusses the possibility of reducing multiple access interference (MAI) using a Two-Photon Absorption (TPA) process. The advanced grating devices enable the improvement of system performance. A dynamically reconfigurable optical packet processing system and a 16-channel reconfigurable OCDMA/DWDM system with 50GHz DWDM intervals has been demonstrated.These results highlight the feasibility of FBG-based optical coding/decoding techniques, with improved system flexibility and sustainability
Orthogonius rogueti Tian et Deuve, n. sp.
No full textOrthogonius rogueti Tian et Deuve, n. sp. Figs 1 –2, 9– 12 Description. Length: 11.0 mm in male, 12.0 mm in female; width: 4.7 mm in male, 5.2 mm in female. Habitus as in Figs 9–10. Head, pronotum, elytra, and underside of head dark brown, underside of thoraces, ventrites, legs, antennae and palps yellow, mandibles and lateral expanded margins of pronotum light dark brown; moderately shiny in both male and female; head obscurely striated, with sparsely punctate on base of head, and disc of pronotum, coarsely punctate near basal foveae and along lateral expanded margins at base, elytra with dense and small punctures. Head wide, HW/HL= 1.14, eyes almost same convex in male and female. Pronotum almost twice as wide as long, PW/PL= 1.88, PbW/PfW= 1.33; widest at a little behind middle. Elytra widest at about middle, EL/EW= 1.50, slightly expanded at both sides, not parallel-sided. Fore tibia with more slender but outer angle less developed in male than in female (Figs 1–2); 1 st hind tarsomere distinctly loner than 5 th. Male genitalia (Figs 11–12): The median lobe of aedeagus very short, stout and robust, extremely expanded medially on both dorsal and ventral aspects, almost 1 / 3 as thick as long, dorsal opening long, nearly 2 / 3 as long as aedeagus; apex broadly blunt; apical lamella short and broad, almost as long as wide, gently constricted towards apical tip. Remarks. This new species is easily separated from other congeners by its robust and strikingly expanded aedeagus, and its broader and wider apical lamella. Materials examined. Holotype. ♂, labeled “ India: Tamil Nadu, Viluppuran Dt.: Thely, 25 / 26.VII. 2010, aux UV, Roguet D.”, in MNHN; Paratype, 1 ♀, labeled “ India: Tamil Nadu, Viluppuran Dt.: Thely, 2.VII. 2007, aux lumieres, Roguet D.”, in Coll. D. Roguet. Etymology. Patronym, it is dedicated to Mr. D. Roguet, collector of the type specimens. Distribution. Southern India.Published as part of Tian, Mingyi & Deuve, Thierry, 2016, A review of the baconii species group of the termitophilous genus Orthogonius Macleay (Coleoptera: Carabidae: Orthogoniini), pp. 118-126 in Zootaxa 4093 (1) on page 125, DOI: 10.11646/zootaxa.4093.1.7, http://zenodo.org/record/26068
Figure 4 from: Tian M, Huang S, Wang D (2017) Discovery of a most remarkable cave-specialized trechine beetle from southern China (Coleoptera, Carabidae, Trechinae). ZooKeys 725: 37-47. https://doi.org/10.3897/zookeys.725.21040
No full textFigure 4 Male genitalia of three highly modified aphaenopsian beetles, median lobe and parameres in lateral, and apical lobe in dorsal views, respectively a, b Xuedytes bellus c, d Giraffaphaenops yangi Tian & Luo, 2015 e Dongodytes grandis Uéno, 1998
Eutrichodesmus simplex Liu & Tian, 2013, sp. n.
No full textEutrichodesmus simplex sp. n. Figs 3–5 Material: Holotype male (SCAU), China, Jiangxi Prov., Fenyi County, Taoyuan Dong, 0 1.10. 2012. leg. Tian Mingyi (CHIjx 12 -LWX01). Paratypes: 2 males, 1 female (IZAS), 2 males, 1 female (ZMUM), 7 males, 3 females, 6 juv. (SCAU), same locality, together with holotype. Name: To emphasize the rather simple gonopod acropodite. Diagnosis: Differs from congeners by the metaterga behind the collum supporting three transverse isostictic rows of large, rounded, setigerous tubercles, and the gonopod telopodite carrying a conspicuous, microtuberculate, distofemoral process (dp) at about midway and a rather simple acropodite. Description: All characters as in E. digitatus sp. n., except as follows. Length of adults of both sexes ca 8.0- 9.5 mm, width 1.8-2.5 mm. Holotype ca 9.0 mm long and 2.5 mm wide. Coloration uniformly pallid or light yellowish (Figs 3, 4 A). Antennae rather long and slender. Collum semi-circular, evidently flattened mid-dorsally, entire surface microvillose, with five irregular transverse rows of round tubercles (Fig. 3 C). Metaterga behind collum with three transverse isostictic rows of large, rounded, setigerous tubercles (Figs 3 A-B, D), two frontal rows being highest and best expressed in ♀. Paraterga 2 strongly enlarged, subvertical, with a series of lobulations anterolaterally; paraterga 3 and 4 slightly shorter than others, each with three lobulations anterolaterally, overlap of following paraterga typical (Fig. 3 B). Paraterga 8 and following paraterga quadrilobulate (Fig. 3 D, E). Pleurosternal ridges present in segments 2 and 3 (♂, ♀). Sterna between ♂ coxae 6-7 and 9 much wider. Legs long and slender, barely reaching tips of paraterga; femora and tarsi longest, subequal in length; some setae with microdenticulations (Fig. 3 E). Gonopods (Figs 4 B-D, 5 A-B) very simple. Coxae subquadrate, large, microtuberculate and abundantly setose ventrolaterally. Telopodite longer than coxite, slender throughout, setose in its basal half, with a conspicuous, microtuberculate, distofemoral process (dp) at about midway. Acropodite erect, rather simple, devoid of a hairpad; seminal groove terminating subapically. Remarks: This is a typical “doratodesmid”, possibly a troglobite.Published as part of Liu, Weixin & Tian, Mingyi, 2013, Four new cavernicolous species of the millipede genus Eutrichodesmus Silvestri, 1910 from southern China (Diplopoda: Polydesmida: Haplodesmidae), pp. 281-291 in Zootaxa 3734 (2) on pages 284-285, DOI: 10.11646/zootaxa.3734.2.11, http://zenodo.org/record/21850
Uenotrechus liboensis Deuve et Tian 1999
No full textUenotrechus liboensis Deuve et Tian, 1999 (Figures 2, 3, 5a–d) Deuve et al., 1999: 133 (Type locality: Cave Jinshi Dong, erroneously written as “Shuijiang Dong” in the original description) Material examined. 1 male (SCAU), the holotype, labeled “ Jinshi Dong, 15 m below the entrance, Sanchahe, Libo, Guizhou, 108°4'10" E / 25°17'47" N, 580 m, IX-1997, Jingcheng Ran leg.”; 1 males and 1 female (SCAU), 1 male (MNHN), labeled “ Chang Dong, Baidan, Mulun National Nature Reserve (also the Huanjiang World Natural Heritage Site of Southern China Karsts), Huanjiang Maonan Autonomous County, Guangxi Zhuang Autonomous Region, 107°58’47.20″ E / 25°09’15.60″ N, VIII-26-2011, Youbang Li leg., CHIgx11-LYB14”; 1 male (SCAU), labeled “ Cave Gui Dong II, Mulun National Nature Reserve, Huanjiang County, Guangxi, 107°98’27.33″ E / 25°14’65.89″ N, V-18-2007, Franck Brehier leg.”. Diagnosis. Large and eyeless trechine beetles, dark to yellowish brown, fore body darker; antennae and legs long; head expanded laterally, mentum 4-setose, mentum tooth bifid at tip; lateral margins of pronotum not sinuate before hind angles which are bluntly rectangular, base evidently arcuate forwardly; median lobe of aedeagus thin and slender, with a apical notch which is faintly reflexed (Figs. 6 a–d). Habitus as in Fig. 3. Variability. Individuals from Cave Chang Dong are darker, slenderer and having longer antennae than those from caves Jinshi Dong and Gui Dong II. Considering the similarity of male genitalia (Figs. 5a–d), we presume that they are identical. Notes on the type locality. When Uéno & Ran (2001) re-described U. liboensis Deuve et Tian, 1999, they pointed out that the type locality of this interesting species is probably Cave Bimang Dong instead of Cave Shuijiang Dong cited in the original description (Deuve et al. 1999). According to collecting label, the type locality of U. liboensis is actually Cave Jinshi Dong in the eastern part of Maolan nature reserve, other than either Bimang Dong in the western part, or Shuijiang Dong in the north. However, Uéno & Ran’s species is probably another species, according to their illustration (Uéno & Ran 2001, p. 14, Figs. 2–3), other than U. liboensis because the male genital characters of the individuals collected from caves Pusa Dong (and Dazhu Dong) are so different from those of the holotype specimen. To confirm this it is necessary to visit and collect more material in both above caves which are in central part of Maolan nature reserve and inaccessible. Distribution. China (Guizhou and Guangxi) (Fig. 2). Known so far from the bordering karstic areas of Maolan (Libo County) and Mulun (Huanjiang County), both are the World Natural Heritage Sites of Southern China Karsts.Published as part of Wei, Guofu, Chen, Jujian & Tian, Mingyi, 2017, A review of the aphaenopsian ground beetle genus Uenotrechus Deuve et Tian, 1999 (Coleoptera: Carabidae: Trechinae), pp. 361-373 in Zootaxa 4282 (2) on pages 363-364, DOI: 10.11646/zootaxa.4282.2.9, http://zenodo.org/record/81874
MeSH term explosion and author rank improve expert recommendations
No full textInformation overload is an often-cited phenomenon that reduces the productivity, efficiency and efficacy of scientists. One challenge for scientists is to find appropriate collaborators in their research. The literature describes various solutions to the problem of expertise location, but most current approaches do not appear to be very suitable for expert recommendations in biomedical research. In this study, we present the development and initial evaluation of a vector space model-based algorithm to calculate researcher similarity using four inputs: 1) MeSH terms of publications; 2) MeSH terms and author rank; 3) exploded MeSH terms; and 4) exploded MeSH terms and author rank. We developed and evaluated the algorithm using a data set of 17,525 authors and their 22,542 papers. On average, our algorithms correctly predicted 2.5 of the top 5/10 coauthors of individual scientists. Exploded MeSH and author rank outperformed all other algorithms in accuracy, followed closely by MeSH and author rank. Our results show that the accuracy of MeSH term-based matching can be enhanced with other metadata such as author rank
Desmodium Jiang, Tian & Pan, 2022, s. str.
No full textKey to <i>Desmodium s. str.</i> taxa naturalized in China: <p> 1. Pods linear, slender; articles narrowly elliptic, ca. 3 × as long as wide......................................................................... <i>D. scorpiurus</i></p> <p>1. Pods narrowly oblong; articles orbicular, triangular or nearly so, nearly as long as wide or slightly longer....................................2</p> <p> 2. Both sutures of pods constricted between articles, moniliform...................................................................................... <i>D. tortuosum</i></p> <p>2. Adaxial suture of pods straight or somewhat undulate, abaxial suture constricted between articles.................................................3</p> <p> 3. Adaxial surface of leaflet with a silvery plaque along the midvein............................................................................... <i>D. uncinatum</i></p> <p> 3. Adaxial surface of leaflet without plaque.......................................................................................................................... <i>D. intortum</i></p>Published as part of <i>Jiang, Kai-Wen, Tian, Bin & Pan, Bo, 2022, Legume additions to the flora of China, pp. 1-21 in Phytotaxa 532 (1)</i> on page 4, DOI: 10.11646/phytotaxa.532.1.1, <a href="http://zenodo.org/record/5900839">http://zenodo.org/record/5900839</a>
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