99,917 research outputs found
Dataset for Influence of rail fastener stiffness on railway vehicle interior noise
No full textThis dataset supports the publication:
"Influence of rail fastener stiffness on railway vehicle interior noise"
Authors: Li Li, David Thompson, Yingsong Xie, Qian Zhu, Yanyun Luo, Zhenyu Lei
Journal: Applied Acoustics </span
Lattice Boltzmann modeling of multiphase flows at large density ratio with an improved pseudopotential model
Full text linkOwing to its conceptual simplicity and computational efficiency, the pseudopotential multiphase lattice Boltzmann (LB) model has attracted significant attention since its emergence. In this work, we aim to extend the pseudopotential LB model to simulate multiphase flows at large density ratio and relatively high Reynolds number. First, based on our recent work [Q. Li, K. H. Luo, and X. J. Li, Phys. Rev. E 86, 016709 (2012)], an improved forcing scheme is proposed for the multiple-relaxation-time pseudopotential LB model in order to achieve thermodynamic consistency and large density ratio in the model. Next, through investigating the effects of the parameter a in the Carnahan-Starling equation of state, we find that the interface thickness is approximately proportional to 1/a?. Using a smaller a will lead to a wider interface thickness, which can reduce the spurious currents and enhance the numerical stability of the pseudopotential model at large density ratio. Furthermore, it is found that a lower liquid viscosity can be gained in the pseudopotential model by increasing the kinematic viscosity ratio between the vapor and liquid phases. The improved pseudopotential LB model is numerically validated via the simulations of stationary droplet and droplet oscillation. Using the improved model as well as the above treatments, numerical simulations of droplet splashing on a thin liquid film are conducted at a density ratio in excess of 500 with Reynolds numbers ranging from 40 to 1000. The dynamics of droplet splashing is correctly reproduced and the predicted spread radius is found to obey the power law reported in the literatur
Tachycines (Gymnaeta) plumiopedella Li & Feng & Luo 2021, sp. nov.
No full textTachycines (Gymnaeta) plumiopedella sp. nov. (Figs. 3, 4) Description. Male. Body medium size (Figs. 3A–C). Vertex of head divided into two conical tubercles, bases of the well-developed tubercles not drawn together, obtusely rounded apices separated (Fig. 3D). Eyes normal, not reduced (Fig. 3D). Anterior margin of pronotum straight, posterior margin protruding caudad, ventral margin arcshaped; posterior margin of mesonotum protruding caudad; posterior margin of metanotum caudad. Legs long and slender. Coxae with small medial projections. Fore femur about 2.1 times longer than the pronotum, ventrally unarmed, internal genicular lobe with 1 small spine, external genicular lobe with 1 long spine; fore tibia ventrally with 1 inner spine and 2 outer spines, apex with 1 small outer spine on dorsal surface and 1 pair of long spines on ventral surface, between the paired ventral spines with 1 small spine. Middle femur ventrally unarmed, internal and external genicular lobes with 1 long spine respectively; middle tibiae ventrally with 1 inner spine and 1 outer spine, apex with 1 pair of dorsal spines and 1 pair of ventral spines, between the paired ventral spines with 1 small spine. Hind femur ventrally unarmed; hind tibia dorsally with 67–69 inner spines and 66–67 outer spines, arrange in groups, ventral and dorsal surface with a pair of small subapical spines respectively, apex with 1 pair of long dorsal spines and 1 pair of long ventral spines; the longest dorso-apical spine not exceeding the dorso-apical spine of hind metatarsus (Fig. 3E). Hind metatarsus keeled beneath. Abdominal sternites with short ventral projections. Epiphallus of male genitalia like the shape of “H”; median lobe of genitalia with 1 pair of apical lobules, divided by a deep notch; paired lateral sclerites rather large; ventral lateral lobes longer than dorsal lateral lobes (Figs. 3F, G). Female. General appearance similar to that of male (Figs. 4A–C). Ovipositor shorter than the half of hind femur; base of ovipositor broad, narrowing to apex; apex pointed and slightly curved upwards; almost indistinct denticles on ventral edge of distal part of inferior valves (Fig. 4D). Subgenital plate with 3 nearly triangular lobes, median lobe rather large and paired lateral lobes small (Fig. 4E). Coloration. Body brown with distinct deep brown stripes on the posterior margins of the tergites. The two conical tubercles of vertex dark brown. Face without longitudinal stripes. Hind femora with plumose stripes laterally. Material examined. Holotype: 1♂, Yinxing Cave, Yongan Town, Fenggang County, Zunyi City, Guizhou Province, 6.X.2019, coll. Bing Li. Paratypes: 2♂, 1♀, same data as the holotype. Other specimens: 28♂, 35♀, Shui Cave, Yongan Town, Fenggang County, Zunyi City, Guizhou Province, 6.X.2019, coll. Bing Li; 3♂, 1♀, Er Cave, Yongan Town, Fenggang County, Zunyi City, Guizhou Province, 26.X.2019, coll. Bing Li; 1♂, Youcai Cave, Xihe Town, Meitan County, Zunyi City, Guizhou Province, 14.XI.2019, coll. Bing Li & Xueli Feng; 1♀, Shang Cave, Xihe Town, Meitan County, Zunyi City, Guizhou Province, 15.XI.2019, coll. Bing Li & Xueli Feng; 3♂, 1♀, Qin- glong Cave, Yongan Town, Fenggang County, Zunyi City, Guizhou Province, 16.XI.2019, coll. Bing Li & Xueli Feng; 2♂, 1♀, Xiao Cave, Yongan Town, Fenggang County, Zunyi City, Guizhou Province, 16.XI.2019, coll. Bing Li; 2♂, 5♀, Shirong Cave, Xihe Town, Meitan County, Zunyi City, Guizhou Province, 16.XI.2019, coll. Bing Li & Xueli Feng. Measurements (mm). Body: ♂ 13.68–14.65, ♀ 14.44–16.41; pronotum: ♂ 5.53–6.56, ♀ 5.74–5.84; fore femur: ♂ 12.05–13.12, ♀ 11.95–12.50; hind femur: ♂ 23.93–25.05, ♀ 24.66–25.31; ovipositor: ♀ 12.67–13.93. Distribution. China (Guizhou). Discussion. The new species is similar to T. (G.) lalinus Feng, Huang & Luo, 2019 in the shape of the epiphallus of male genitalia, but can be separated from the latter by several morphological features. First, the shape of the lateral sclerites of male genitalia and the shape of the female subgenital plate are different between the two species. Second, the number of spines on the hind tibiae of this new species is higher than that in T. (G.) lalinus Feng, Huang & Luo, 2019. Third, the coloration of the body is different between these two species. Etymology. The name of the new species refers to the plumose stripes on the hind femora.Published as part of Li, Bing, Feng, Xueli & Luo, Changqing, 2021, Four new species of the subgenus Tachycines (Gymnaeta) (Rhaphidophoridae Aemodogryllinae: Aemodogryllini) from caves in northern Guizhou, China, pp. 150-160 in Zootaxa 4991 (1) on pages 153-155, DOI: 10.11646/zootaxa.4991.1.7, http://zenodo.org/record/502769
Nazeris gaoleii Hu & Luo & Li 2018, sp. n.
No full textNazeris gaoleii Hu, Luo & Li, sp. n. (Figs 8, 19–23) Type material. Holotype: CHINA: male: ‘ China: Guangdong Prov., Ruyuan, Nanling N. R., Xiaohuangshan, 24°54′00″N, 113°01′24″E, 1457 m, X.2009, Lei Gao leg.’ (SNUC). Paratypes: 1 female, same data as holotype; 1 male, 2 females, same data, except ‘ Laopengkeng, 24°56′29″N, 113°00′27″E, mixed forest, leaf litter, wood, sifted, 1360 m, 29.IV.2015, Peng, Tu, Zhou leg.’; 4 males, 2 females, same data, except ‘ Shikengkong, 24°55′33″N, 112°59′29″E, bamboo forest, leaf litter, sifted, 1820 m, 30.IV.2015, Peng, Tu, Zhou leg.’; 4 females, same data, except ‘ Laopengyidui, 24°56′21″N, 113°01′21″E, mixed forest, leaf litter, wood, sifted, 1260 m, 2.V.2015, Peng, Tu, Zhou leg.’; 1 male, 1 female, same data, except ‘ Disilindao, 24°55′47″N, 112°59′50″E, mixed forest, leaf litter, wood, sifted, 1500 m, 5.V.2015, Peng, Tu, Zhou leg.’; 3 males, 1 female, ‘ China: Hunan, Chenzhou, Yizhang, Mangshan N. R. 24°56′26″N, 112°59′18″E, mixed forest, leaf litter, wood, sifted & beating, 1400 m, 26.IV.2015, Peng, Tu, Zhou leg.’. Description. Body length 4.2–4.9 mm; forebody length 2.4–2.7 mm. Body (Fig. 8) reddish brown; antennae and legs yellowish brown. Head (Fig. 19) approximately as long as wide; punctation very dense, moderately coarse, non-umbilicate and not confluent, interstices with very fine microsculpture; postocular portion approximately twice as long as eye length. Pronotum (Fig. 19) 1.06–1.20 times as long as wide, approximately as long and 0.87–0.94 times as broad as head; punctation similar to that of head; midline posteriorly with short and very narrow impunctate elevation; interstices lacking microsculpture. Elytra (Fig. 19) 0.63–0.69 times as long as wide, 0.54–0.61 times as long and 0.95–0.99 times as broad as pronotum; punctation as dense as, and slightly less coarse than that of pronotum; interstices lacking microsculpture. Abdomen with punctation dense and moderately coarse on tergites III–IV, dense and less coarse on tergite V– VI, moderately dense and fine on tergites VII–VIII; interstices with fine microsculpture. Male. Sternite VII (Fig. 20) with posterior margin small excision in the middle. Sternite VIII (Fig. 21) with Vshaped posterior excision. Aedeagus (Figs 22, 23) with ventral process gradually narrowed apically in ventral view, with pair of wing-like basal laminae ventrally; dorso-lateral apophyses short, distinctly slender in apical half in ventral view, not reaching apex of ventral process. Distribution and habitat. The species is known from Nanling in northern Guangdong and Mangshan in southern Hunan. The specimens were collected by sifting leaf litter at altitudes of 1260 –1820 m. Comparative notes. The new species is very similar to N. jiaweii Hu, Liu & Li in general appearance and aedeagal characters, but can be separated by the narrower posterior excision of male sternite VIII (Fig. 21), and much shorter dorso-lateral apophyses of the aedeagus (Figs 22). Etymology. The specific epithet is dedicated to Lei Gao, who collected some of the type specimens.Published as part of Hu, Jia-Yao, Luo, Yong-Ting & Li, Li-Zhen, 2018, New species and record of Nazeris Fauvel in southern China (Coleoptera, Staphylinidae, Paederinae), pp. 173-180 in Zootaxa 4429 (1) on pages 178-179, DOI: 10.11646/zootaxa.4429.1.10, http://zenodo.org/record/127956
Nazeris nanlingensis Hu & Luo & Li 2018, sp. n.
No full textNazeris nanlingensis Hu, Luo & Li, sp. n. (Figs 7, 14–18) Type material. Holotype: CHINA: male: ‘ China: Guangdong Prov., Ruyuan, Nanling N. R., Shikengkong, 24°55′33″N, 112°59′29″E, bamboo forest, leaf litter, sifted, 1820 m, 30.IV.2015, Peng, Tu, Zhou leg.’ (SNUC). Paratypes: 15 males, 10 females, same data as holotype; 2 males, 1 female, same data, except ‘ 1100 m, 14.VIII.2008, Nan Qi & Zi-Wei Yin leg.’; 1 male, same data, except ‘ Shikengkong, 24°55′38″N, 112°59′30″E, bamboo forest, leaf litter, sifted, 1850 m, 27.IV.2015, Peng, Tu, Zhou leg.’; 1 male, 1 female, same data, except ‘ Hamashi, 24°55′37″N, 112°59′21″E, mixed forest, leaf litter, sifted, 1750 m, 1.V.2015, Peng, Tu, Zhou leg.’; 5 males, 2 females, same data, except ‘ Disilindao, 24°55′47″N, 112°59′50″E, mixed forest, leaf litter, wood, sifted, 1500 m, 5.V.2015, Peng, Tu, Zhou leg.’; 2 males, 1 female, ‘ China: Hunan, Chenzhou, Yizhang, Mangshan N. R. 24°56′26″N, 112°59′18″E, mixed forest, leaf litter, wood, sifted & beating, 1400 m, 26.IV.2015, Peng, Tu, Zhou leg.’. Description. Body length 3.8–4.4 mm; forebody length 2.1–2.4 mm. Body (Fig. 7) reddish brown; antennae and legs yellowish brown. Head (Fig. 14) approximately as long as wide; punctation moderately dense, moderately coarse, distinctly umbilicate and partly confluent, interstices lacking microsculpture; postocular portion approximately 1.5 times as long as eye length. Pronotum (Fig. 14) 1.08–1.14 times as long as wide, approximately as long and 0.87–0.89 times as broad as head; punctation non-umbilicate, moderately dense and as coarse as that of head; midline posteriorly with short and very narrow impunctate elevation; interstices lacking microsculpture. Elytra (Fig. 14) 0.63–0.65 times as long as wide, 0.53–0.58 times as long and 0.96–0.99 times as broad as pronotum; punctation as dense as, and slightly less coarse than that of pronotum; interstices lacking microsculpture. Abdomen with punctation dense and rather coarse on tergites III–V, dense and less coarse on tergite VI, moderately dense and fine on tergites VII–VIII; interstices lacking microsculpture. Male. Sternite VII (Fig. 15) with posterior margin shallowly concave in the middle. Sternite VIII (Fig. 16) with triangular posterior excision. Aedeagus (Figs 17, 18) with ventral process distinctly broad in apical half and apex shallowly concave in the middle in ventral view, with pair of wing-like basal laminae ventrally; dorso-lateral apophyses very slender, distinctly curved near apex in ventral view, extending beyond apex of ventral process. Distribution and habitat. The species is known from Nanling in northern Guangdong and Mangshan in southern Hunan. The specimens were collected by sifting leaf litter at altitudes of 1100 –1850 m. Comparative notes. The new species is very similar to N. rubidus from the same locality in general appearance and aedeagal characters, but can be separated by the smaller forebody size; less dense punctation of the head and pronotum (Figs 14); wider ventral process and slenderer dorso-lateral apophyses of the aedeagus in ventral view (Fig. 17). Etymology. The specific epithet is derived from the name of the type locality: Nanling.Published as part of Hu, Jia-Yao, Luo, Yong-Ting & Li, Li-Zhen, 2018, New species and record of Nazeris Fauvel in southern China (Coleoptera, Staphylinidae, Paederinae), pp. 173-180 in Zootaxa 4429 (1) on pages 177-178, DOI: 10.11646/zootaxa.4429.1.10, http://zenodo.org/record/127956
Cacopsylla spiraeicola Luo & Li & Cai 2016, comb. nov.
No full textCacopsylla spiraeicola (Li, 2011) comb. nov. Figures 7 (a–g), 8(e), 10(i–j) Euphaleropsis spiraeicola Li, 2011: 492. Redescription Adult. Colouration (Figure 10 (i–j)). Body brown in overall view. Vertex brown, discal foveae moderately darker. Genal processes slightly darker than vertex. Compound eyes black; lateral ocelli brown, medial ocellus orange. Antenna generally brown to dark brown, with basal half of segments III–V lighter. Thoracic dorsum with dark brown stripes and patterns. Thoracic pleurites generally brown, irregularly darkened along pleural sulci. Legs yellowish brown; pro- and mesocoxae dark brown, metacoxa irregularly darkened; trochanters dark brown; femora more or less darkened. Fore wing (Figure 7 (f)) membrane hyaline, with brown to dark brown clouding, leaving breaches at apices of cells r 2, m 1, m 2 and cu 1; most veins brown, costal margin yellow. Hind wing membrane hyaline, more or less brownish along veins; veins light brown to brown. Abdomen and male and female terminalia dark brown to black. Structures. Head (Figure 7 (a)) inclined from longitudinal body axis by 45°, slightly narrower than mesoscutum transversely. Boundary between vertex and gena clear, without outstanding antero-outer angles; discal foveae relatively shallow, secondary foveae slightly concave. Surface of vertex finely sculptured with scaly microstructures and microscopic setae that gradually grow longer on antero-inner angles, exceeding length of setae around antennal insertion. Plane of genal processes inclined from that of vertex by about 45°. Gena processes about half as long as median suture of vertex, widely divergent apically, with apices nearly rounded. Antenna longer than HW, relatively thick; terminal setae rather short, the more distally situated one about 1/3 as long as the more proximally situated one (Figure 7 (g)). Mesopraescutum moderately produced forward, pressing pronotum to be moderately arched. Metatibia without genual spine, with four apical spurs, arranged in 1 + 2 + 1. Fore wing (Figure 7 (f)) oblong oval, widest in the middle; veins relatively thick; height of cell cu 1 indistinctly longer than length of vein Cu 1b; surface spinules (in dorsal surface) and radular spinules (in ventral surface) completely covering the whole fore wing membrane. Male terminalia: Proctiger (Figure 7 (b)) without posterior lobe, gently arched, covered with nearly evenly spaced short setae. Paramere (Figures 7 (b–c)) strongly curved forward at basal 1/4, then gently curved backwards; apical tooth finely congruent with the main part, moderately curved inwards, with tip acute and pointed forward; inner surface with dozens of erect short setae. Distal segment of aedeagus (Figure 7 (d)) gently curved downwards; apical dilatation near oval, not hooked; ductus ejaculatorius relatively thick, sclerotised end tube projected obliquely backwards, and gently curved upwards. Subgenital plate (Figure 7 (b)) with small anterior lobe, ventral surface waved in profile. Female terminalia (Figure 7 (e)): Relatively long and simple. Anal ring rather small; dorsal surface of proctiger smoothly convex near base of apical process; longitudinal row of rather long setae in dorsum of apical process formed of nearly evenly spaced setae. Subgenital plate relatively long and narrow in profile, without relatively long setae near dorsal margin. Valvulae dorsalis and ventralis slightly curved upwards. Material examined Holotype: male, dry mounted, Mountain Lv, Beizhen, Liaoning, China, April 1992, Guan Shuwei, on Spiraea salicifolia. Paratypes: 5 males, 6 females, dry mounted, 2 males, 2 females, slide mounted, 5 males, 5 females, preserved in absolute ethanol, same data as holotype. Non-type material: 1 male, 1 female, slide mounted, 5 males, 8 females, dry mounted, Lingshan, Mentougou, Beijing, China, 16 April 2012, Luo Xinyu, on Spiraea trilobata L. Host plant Unknown. In April of Liaoning province and Beijing, all psyllids are still in hibernation. Spiraea spp. recorded here are probably shelter plants.Published as part of Luo, Xinyu, Li, Fasheng & Cai, Wanzhi, 2016, Chinese psyllids in the genus Cacopsylla (Hemiptera: Sternorrhyncha: Psylloidea) associated with Spiraea (Rosaceae), pp. 2215-2235 in Journal of Natural History 50 on pages 2229-2232, DOI: 10.1080/00222933.2016.1193644, http://zenodo.org/record/399297
Dryopteris jiucaipingensis (Dryopteridaceae), a New Species in Dryopteris sect. Hirtipedes from Guizhou, China
No full textA new fern species, Dryopteris jiucaipingensis P. S. Wang, Q. Luo & Li Bing Zhang (Dryopteris Adans., sect. Hirtipedes Fraser-Jenk.; Dryopteridaceae), is described and illustrated from northwestern Guizhou, China. Dryopteris jiucaipingensis is most similar to D. lunanensis (Christ) C. Chr., but the former taxon has light brown rachis scales and occurs in alpine regions (at an elevation of 2580 m), while the latter has nearly black rachis scales and is found in montane and lowland areas (below 900 m)
爾雅
No full text羅願著.綫裝.框23.7 x 14.9公分, 9行18字, 白口, 四周雙邊, 單魚尾. 版心中鐫書名及卷次.卷前有李化龍、車養志、方回、洪焱祖等人序.出版年據羅朗重訂洪焱祖跋.鈐有硃印.Juan qian you Li Hualong, Che Yangzhi, Fang Hui, Hong Yanzu deng ren xu.Chu ban nian ju Luo Lang chong ding Hong Yanzu ba.Xian zhuang.Kuang 23.7 x 14.9 gong fen, 9 xing 18 zi, bai kou, si zhou shuang bian, dan yu wei. Ban xin zhong juan shu ming ji juan ci.Qian you zhu yin.Luo Yuan zhu
Tangguoa Yao & Luo & Li 2021, gen. nov.
No full textGenus <i>Tangguoa</i> Yao & Li gen. nov. <p> Type species: <i>Tangguoa laibin</i> Yao & Li <b>sp. nov.</b></p> <p> <b>Etymology.</b> The generic name is dedicated to the late Chinese arachnologist Guo Tang. Gender is feminine.</p> <p> <b>Diagnosis.</b> This genus can be easily distinguished from <i>Khorata</i> Huber, 2005 and <i>Savarna</i> Huber, 2005 by male pedipalpal femur strongly curved dorsally (Figs 2 A–B, 4A–B; straight/slightly curved in <i>Khorata</i> and <i>Savarna</i>), by male chelicerae with distal apophyses medially (arrow da in Figs 3 C–D, 5C–D; with distal apophyses laterally in <i>Khorata</i>, without distal apophyses in <i>Savarna</i>) provided with row of teeth (without teeth in <i>Khorata</i>), and by external female genitalia with postero-median apophysis provided with pointed tip (arrow ma in Figs 3A, 5A; some species with postero-median lip in <i>Khorata</i>, without postero-median apophysis in <i>Savarna</i>); also distinguished from <i>Khorata</i> by male chelicerae without hooked frontal apophyses (Figs 3 C–D, 5C–D; with hooked frontal apophyses medially in <i>Khorata</i>).</p> <p> <b>Description. Male:</b> Total length 2.03–2.84 (2.23–3.03 with clypeus). Ocular triads relatively close together, distance PME-PME 0.16, diameter PME 0.10–0.11, distance PME-ALE 0.03, AME absent. Sternum wider than long. Carapace with brownish radiating marks and narrow, dark median line/brown margins and wide, brown median stripe; clypeus with brownish lateral marks; sternum brown (Figs 3 E–F, 5E–F). Legs with distinct darker rings on subdistal parts of femora and proximal/subdistal parts of tibiae. Opisthosoma with large, brown posterior marks/ large, brown, dorsal and lateral spots (Figs 3 E–F, 5E–F). Ocular area slightly elevated and separated from rest of carapace. Thoracic furrow shallow, but distinct (Figs 3E, 5E). Clypeus unmodified. Opisthosoma oval. Chelicerae with pair of proximo-lateral apophyses (arrow pa in Figs 3 C–D, 5C–D) with lateral apophyses and scales (arrow in Figs 3 C–D, 5D) and pair of distal apophyses with row of teeth (arrow da in Figs 3 C–D, 5C–D). Pedipalpal coxa unmodified; trochanter with retrolateral apophysis and ventral apophysis (both as wide as long; Figs 2 A–B, 4A–B); femur strongly curved dorsally, with retrolateral apophysis (Figs 2B, 4B); patella large; procursus complex distally, without hinged process (hinged process defined as figs 421, 432 in Huber 2011a); bulb simple, without other projections except for embolus (Figs 2 A–B, 4A–B). Leg formula 1>2>4>3 or 1>4>2>3; retrolateral trichobothrium of tibia I at 10–11% proximally; legs with vertical setae on tibiae, metatarsi and tarsi, without spines or curved setae; tarsus I with>15 distinct pseudosegments.</p> <p> <b>Female:</b> Similar to male, sexual dimorphism very slight. Legs slightly shorter. Chelicerae unmodified. External female genitalia brown, simple, with postero-median apophysis (arrow ma in Figs 3A, 5A) provided with pointed tip, without knob or pockets. Vulva (Figs 3B, 5B) with anterior arch and pair of pore plates.</p> <p> <b>Natural history.</b> Unknown, excepting the specific data of collection from specimens presented here.</p> <p> <b>Distribution.</b> China (Guangxi, Hainan; Fig. 1).</p> <p> <b>Composition.</b> <i>T. laibin</i> Yao & Li <b>sp. nov.</b> and <i>T. tongguling</i> Yao & Li <b>sp. nov.</b></p>Published as part of <i>Yao, Zhiyuan, Luo, Yiping & Li, Shuqiang, 2021, Tangguoa gen. nov., one new genus of daddy-long-leg spiders (Araneae: Pholcidae) from southern China, pp. 131-140 in Zootaxa 4938 (1)</i> on page 132, DOI: 10.11646/zootaxa.4938.1.7, <a href="http://zenodo.org/record/4561477">http://zenodo.org/record/4561477</a>
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