490 research outputs found
Meta weining Wang & Irfan & Chen & Zhang 2022, sp. nov.
No full textMeta weining sp. nov. urn:lsid:zoobank.org:act: B4BF84EA-2EF2-4C71-9E5C-0024D0705A84 Figs 1L–M, 19–22 Differential diagnosis This new species resembles M. tibet sp. nov. (Figs 13–15) in having a similar embolus; V-shaped cymbial ectobasal process in male palp and epigynal plate posteriorly with small, sclerotized depression in female epigyne, but it can be differentiated by the embolus gradually narrow towards the tip in M. weining sp. nov. (Figs 19B–C, 20B–D), whereas abruptly narrow in M. tibet sp. nov. (Figs 13A–B, 14A, C, E). Metaine embolic apophysis longer than wide in ventral view in M. weining sp. nov. (Figs 19B, 20C), whereas wider than long in M. tibet sp. nov. (Figs 13B, 14C). Cymbial ectobasal process tooth present at the end of lateral arm in ventral view in M. weining sp. nov. (Figs 19B, 20C), whereas tooth present on the lateral arm in M. tibet sp. nov. (Figs 13B, 14C). Spermathecae semicircular and fertilization ducts move around the spermathecae from dorsal to the ventral side of epigyne in M. weining sp. nov. (Figs 19E, 21B), whereas spermathecae globular and fertilization ducts move around the spermathecae from ventral to the dorsal side of epigyne in M. tibet sp. nov. (Figs 13E, 15B). Etymology The epithet refers to the type locality. Type material Holotype CHINA • ♂; Guizhou, Bijie City, Weining County, Shanqiaojiedao, Dashan Village, Gaodiping Cave; 26°50′55.03″ N, 104°17′08.81″ E; alt. 2175 m; 23 Apr. 2017; H.M. Chen leg.; SWUC-T-TEg-08-01. Paratypes CHINA • 1 ♂; same collection data as for holotype; SWUC-T-TEg-08-02 • 2 ♀♀; same collection data as for preceding; SWUC-T-TEg-08-03–04. Description Male (holotype, Fig. 1L) MEASUREMENTS. Total length 7.92. Prosoma 3.54 long, 2.83 wide; opisthosoma 4.32 long, 3.00 wide. Eye sizes and interdistances: AME 0.22, ALE 0.22, PME 0.21, PLE 0.20; AME–AME 0.14, AME– ALE 0.21, PME–PME 0.18, PME–PLE 0.29, ALE–PLE 0.05. MOA 0.58 long, front width 0.57, back width 0.61. Clypeus height 0.26. CHELICERAE. Strong, with 3 promarginal and 4 retromarginal teeth. LEG MEASUREMENTS. I = 18.59 (5.01, 6.53, 5.05, 2.00); II = 14.46 (4.15, 5.06, 3.75, 1.50); III = 7.74 (2.42, 2.62, 1.80, 0.90); IV = 11.03 (3.54, 3.53, 2.84, 1.12). Leg formula: 1243. OPISTHOSOMA. Oval, with two pairs of sigillae. Both dorsum and venter greyish, with black markings. PALP (Figs 19A–C, 20A–D). Cymbial ectobasal process simple, V-shaped with pointed end. Paracymbium finger-like, narrow towards tip, with sparse long hairs. Metaine embolic apophysis distal end oval, longer than wide with blunt end, extending forward. EMBOLUS. Long, arc-shaped, with curved tip. Conductor strong, arising meso-retrolaterally from bulb and extending clockwise, longer than wide, with membranous end. Female (paratype SWUC-T-TEg-08-03, Fig. 1M) MEASUREMENTS. Total length 7.50. Prosoma 3.14 long, 2.59 wide; opisthosoma 4.42 long, 3.61 wide. Eye sizes and interdistances: AME 0.18, ALE 0.23, PME 0.21, PLE 0.20; AME–AME 0.18, AME–ALE 0.20, PME–PME 0.14, PME–PLE 0.23, ALE–PLE 0.07. MOA 0.61 long, front width 0.52, back width 0.58. Clypeus height 0.28. LEG MEASUREMENTS. I = 14.05 (3.95, 5.03, 3.48, 1.59); II = 10.84 (3.18, 3.75, 2.64, 1.27); III = 6.51 (1.94, 2.21, 1.49, 0.87); IV = 8.93 (2.86, 3.01, 2.05, 1.01). Leg formula: 1243. Other morphological characteristics same as in male. EPIGYNE (Figs 19D–E, 21A–B). Posterior margin of epigynal plate with indistinct sclerotized depression. VULVA. Spermathecae semicircular. Fertilization ducts thick, S-shaped. Distribution China, Guizhou (Weining) (Fig. 22).Published as part of Wang, Lu-Yu, Irfan, Muhammad, Chen, Hui-Ming & Zhang, Zhi-Sheng, 2022, Seven new species of Meta C. L. Koch, 1836 (Araneae, Tetragnathidae) from Southwest China, pp. 117-147 in European Journal of Taxonomy 834 on pages 142-146, DOI: 10.5852/ejt.2022.834.1905, http://zenodo.org/record/701759
Quantile Regression in Risk Calibration
No full textFinancial risk control has always been challenging and becomes now an even harder problem as joint extreme events occur more frequently. For decision makers and government regulators, it is therefore important to obtain accurate information on the interdependency of risk factors. Given a stressful situation for one market participant, one likes to measure how this stress affects other factors. The CoVaR (Conditional VaR) framework has been developed for this purpose. The basic technical elements of CoVaR estimation are two levels of quantile regression: one on market risk factors; another on individual risk factor. Tests on the functional form of the two-level quantile regression reject the linearity. A flexible semiparametric modeling framework for CoVaR is proposed. A partial linear model (PLM) is analyzed. In applying the technology to stock data covering the crisis period, the PLM outperforms in the crisis time, with the justification of the backtesting procedures. Moreover, using the data on global stock markets indices, the analysis on marginal contribution of risk (MCR) defined as the local first order derivative of the quantile curve sheds some light on the source of the global market risk.CoVaR, Value-at-Risk, quantile regression, locally linear quantile regression, partial linear model, semiparametric model
Image1_Genomic Diversity and Selection Signatures for Weining Cattle on the Border of Yunnan-Guizhou.JPEG
No full textWeining cattle is a Chinese indigenous breed influenced by complex breeding and geographical background. The multi-ethnic breeding culture makes Weining cattle require more attention as livestock resources for its genetic diversity. Here, we used 10 Weining cattle (five newly sequenced and five downloaded) and downloaded another 48 genome data to understand the aspects of Weining cattle: genetic diversity, population structure, and cold-adapted performance. In the current study, a high level of genetic diversity was found in Weining cattle, and its breed comprised two potential ancestries, which were Bos taurus and Bos indicus. The positive selective sweep analysis in Weining cattle was analyzed using composite likelihood ratio (CLR) and nucleotide diversity (θπ), resulting in 203 overlapped genes. In addition, we studied the cold adaptation of Weining cattle by comparing with other Chinese cattle (Wannan and Wenshan cattle) by three methods (FST, θπ-ratio, and XP-EHH). Of the top 1% gene list, UBE3D and ZNF668 were analyzed, and these genes may be associated with fat metabolism and blood pressure regulation in cold adaptation. Our findings have provided invaluable information for the development and conservation of cattle genetic resources, especially in southwest China.</p
Neobelocera lanpingensis Chen 2003
No full text<i>Neobelocera lanpingensis</i> Chen, 2003 <p> <i>Neobelocera lanpingensis</i> Chen, 2003: 2, figs 1–8.</p> <p> <i>Neobelocera lanpingensis</i> – Hou & Chen 2010: 44, figs 1–8.</p> Material examined <p> <b>Holotype</b></p> <p>CHINA • 1 ♂; Yunnan Province, Lanping county; 26°27′ N, 99°25′ E; 12 Aug. 2000; X.S. Chen leg.; GUGC-FS-TN-20000801.</p> <p> <b>Paratypes</b></p> <p>CHINA • 1 ♂, 1 ♀; same collection data as for holotype; GUGC-FS-TN-20000802 to 20000803 • 10 ♂♂, 4 ♀♀; Guizhou Province, Weining County; 27°04′ N, 104°07′ E; 4 Aug. 2017; H.X. Li, J. Wang, Q. Luo and N. Gong leg.; on bamboo; GUGC-FS-TN-20170801 to 20170814.</p> Host plant <p>Bamboo.</p> Distribution <p>China (Yunnan, Guizhou).</p> Remark <p>This species was described from Yunnan Province, China based on two male and one female specimens deposited in GUGC by X.S. Chen (2003). This species is here recorded from Guizhou Province, China for the first time.</p>Published as part of <i>LI, Hong-Xing, Yang, Lin & Chen, Xiang-Sheng, 2020, Two new species of the bamboo-feeding planthopper genus Neobelocera Ding & Yang, 1986 from China (Hemiptera, Fulgoroidea, Delphacidae), pp. 1-14 in European Journal of Taxonomy 641</i> on pages 4-5, DOI: 10.5852/ejt.2020.641, <a href="http://zenodo.org/record/3817119">http://zenodo.org/record/3817119</a>
DataSheet1_Genomic Diversity and Selection Signatures for Weining Cattle on the Border of Yunnan-Guizhou.xlsx
No full textWeining cattle is a Chinese indigenous breed influenced by complex breeding and geographical background. The multi-ethnic breeding culture makes Weining cattle require more attention as livestock resources for its genetic diversity. Here, we used 10 Weining cattle (five newly sequenced and five downloaded) and downloaded another 48 genome data to understand the aspects of Weining cattle: genetic diversity, population structure, and cold-adapted performance. In the current study, a high level of genetic diversity was found in Weining cattle, and its breed comprised two potential ancestries, which were Bos taurus and Bos indicus. The positive selective sweep analysis in Weining cattle was analyzed using composite likelihood ratio (CLR) and nucleotide diversity (θπ), resulting in 203 overlapped genes. In addition, we studied the cold adaptation of Weining cattle by comparing with other Chinese cattle (Wannan and Wenshan cattle) by three methods (FST, θπ-ratio, and XP-EHH). Of the top 1% gene list, UBE3D and ZNF668 were analyzed, and these genes may be associated with fat metabolism and blood pressure regulation in cold adaptation. Our findings have provided invaluable information for the development and conservation of cattle genetic resources, especially in southwest China.</p
Supplement_Inconsistency_Examples_26Jun - Lessons Learned From Multi-regional Trials With Signals of Treatment Effect Heterogeneity
No full textSupplement_Inconsistency_Examples_26Jun for Lessons Learned From Multi-regional Trials With Signals of Treatment Effect Heterogeneity by Gang Li, Hui Quan, Gordon Lan, Soo Peter Ouyang, Fei Chen, Weining Robieson, William Wang, Bruce Binkowitz, Shuai Sammy Yuan, Yoko Tanaka, Josh Chen, Nobushige Matsuoka, Lanju Zhang, Song Yang, and Paul Gallo in Therapeutic Innovation & Regulatory Science</p
Myittana (Benglebra) weiningensis Zhao, Luo & Chen 2023, sp. nov.
No full textMyittana (Benglebra) weiningensis Zhao, Luo & Chen sp. nov. Figs 1–12 Body length: male: 5.45–5.62 mm. (n=6) Coloration. Body yellowish white. Crown yellowish-white, with two longitudinal orange-red stripes extending from the top of head backwards to the lateral margin of the scutellum, which becomes distinctly lighter from basal margin of scutellum (Figs 1, 3). Face yellowish white, eyes black (Figs 4, 5). Pronotum with two additional yellowish stripes on each side near lateral margin (Fig. 3). Forewing with dark-brown longitudinal stripe on commissural margin, extended along entire length (Fig. 1). Costal margin with irregular light brown spot near R 2+3, outer cells and medial area of third cell with another dark brown spot (Figs 1, 3). Legs yellowish white. Head and thorax. Anterior margin of crown narrowly convex, median length slightly less than width between the eyes (1: 1.02) (Figs 2, 4), apex of head truncate in lateral view, with face concave (Fig. 4). Width of face including eyes approximately 1.2 times length (1:0.85) (Fig. 5). Pronotum width slightly wider than width of head including eyes (1.16:1), length longer than mid-length of crown (1.46: 1) (Fig. 3); Forewing length is about 5 times as long as the widest part (4.94:1) (Figs 1, 2). Male genitalia. Pygofer very long and narrow in lateral view, with many long setae in distal half, lamellar projection arising from ventral margin near apical third giving rise to long, thick spine extended distad, tapering toward apex (Figs 6, 7). Valve triangular, subgenital plate broad in middle and bluntly rounded at tip (Fig. 12). Style slender, with finger-like process at tip extended obliquely posterolaterad, subterminal part with elongate setae on inner side (Fig. 11). Connective V-shaped, outer margin of base slightly flat, apex cylindrical (Fig. 8). Aedeagus sub-tubular, robust at base, slightly narrower at middle, tapering at tip (Figs 8–10). Material examined. HOLOTYPE: ♁, China: Guizhou, Bijie City, Weining County, Caohai National Nature Reserve (26°86’N, 104°24’E), 2 August 2017, Xiang-Sheng Chen and Qiang Luo; paratypes: 5♁♁, China: Guizhou, Bijie City, Weining County, Caohai National Nature Reserve (26°86’N, 104°24’E), 2 August 2017, XiangSheng Chen and Qiang Luo. Distribution. China (Guizhou). Host Plant. Bamboo. Etymology. The specific epithet refers to the type locality, Weining County, Guizhou Province. Remarks. The new species is most similar to M. (B.) ventrospina (Chen & Yang, 2007), but the differences are as follows: (1) forewings of the new species with a dark-brown longitudinal stripe on the commissural margin (Fig. 1), the latter lacks the stripe on the forewing; (2) male pygofer of the new species has a lamellar projection and a long spine (Figs 6, 7), the latter has a short, broad spine; (3) style of the new species has a single finger-shaped process at the tip (Fig. 11), the latter has two processes.Published as part of Zhao, Yong-Tao, Luo, Qiang, Yang, Lin, Long, Jian-Kun, Chang, Zhi-Min & Chen, Xiang-Sheng, 2023, Two new species of the bamboo-feeding subgenus Myittana (Benglebra) (Hemiptera Cicadellidae: Deltocephalinae) from China, pp. 82-88 in Zootaxa 5244 (1) on pages 83-85, DOI: 10.11646/zootaxa.5244.1.7, http://zenodo.org/record/764585
Myittana (Benglebra) ventrospina Luo & Yang & Chen 2019, comb. nov.
No full textMyittana (Benglebra) ventrospina (Chen & Yang), comb. nov. Figs 28, 41–44 Mohunia ventrospina Chen, Li & Yang, 2007: 371. Description. Body length: male 5.06–5.28mm (22 specimens), female 5.47–5.70 mm (25 specimens); forewing length: male 4.04–4.22 mm (22 specimens), female 4.30–4.69 mm (25 specimens). Descriptions and illustrations of external features and male genitalia of this species see Chen et al., 2007:370– 371. Female genitalia. Sternite VII with anterior margin slightly concave, posterior margin strongly concave medially (Fig. 28). First valvula as in M. (Benglebra) biflaka sp. nov.. Second valvula dorsal margin smooth teeth. (Figs 43–44). Material examined. ♂ (holotype), China: Guizhou, Daozhen County, Dashahe Nature Reserve (28°53’N, 107°36’E), 19 August 2004, Xiang-Sheng Chen; 3♂♂ 5♀♀ (paratypes), data same as holotype; 8♂, 10♀, Guizhou, Suiyang County, Kuankuoshui Nature Reserve (27°58’N, 107°11’E), 1 August 1984, Zi-Zhong Li; 4♂, 2♀, Guizhou, Daozhen County, 25 July 1984, Zi-Zhong Li; 2♀, Guizhou, Shiqian County, Fodingshan (27°31’N, 108°14’E), 15 August 1994, Xiang-Sheng Chen; 1♂, Guizhou, Libo County, Maolan National Nature Reserve (25°40’N, 108°05’E), 24 May 1998, Xiang-Sheng Chen; 1♂ 5♀, Guizhou, Daozhen County, 17-20 August 2004, Mao-Fa Yang and Bin Zhang; 2♂, Guizhou, Leishan County, Leigong-shan National Nature Reserve (26°28’N, 108°17’E), 13–14 August 2005, Zi-Zhong Li and Bin Zhang; 2♂ 1♀, Guizhou, Weining County, Caohai Lake National Nature Reserve (26°52’N, 104°17’E), 16 August 2015, Guo-Yong Li and Yang-Yang Liu. Host Plant. Bamboo (Qiongzhuea communis). Distribution. China (Guizhou Province). Remarks. We here transfer the species to Myittana ( Benglebra) mainly based on the following characters: head with apex in profile truncate, head and thorax with longitudinal bands dorsally; male pygofer with stout spine arising from ventral margin, directed ventrocaudally; style apophysis apex bifid with two processes; aedeagus tubular and C-shaped in lateral view, gonopore apical on caudal surface. This species is similar to M. (Benglebra) biflaka sp. nov. (see remarks on M. (Benglebra) biflaka sp. nov.) above.Published as part of Luo, Qiang, Yang, Lin & Chen, Xiang-Sheng, 2019, Two new species of the bamboo-feeding subgenus Myittana (Benglebra) from China (Hemiptera: Cicadellidae: Deltocephalinae), pp. 164-172 in Zootaxa 4646 (1) on pages 169-172, DOI: 10.11646/zootaxa.4646.1.9, http://zenodo.org/record/334643
Neodurium weiningensis Zhang & Chen 2008, sp. nov.
No full text1. Neodurium weiningensis Zhang & Chen, sp. nov. (Figs.1–9) Description: Body length (incl. tegm.): ♂ 5.4mm, ♀ 5.5mm; tegminal length: ♂ 4.4mm, ♀ 4.5mm. Coloration: Body yellowish brown. Vertex brown. Eyes dark brown. Frons dark brown with yellowish brown in lateral margins. Clypeus brown with dark brown stripes. Rostrum brown. Antenna dark brown. Pronotum yellowish brown; Mesonotum dark brown. Tegmina yellowish brown with dark brown spots, hindwings pale brown. Legs brown with dark brown spots or stripes. Abdomen ventrally dark brown. Head and thorax: Vertex (Fig.1) pentagonal, apical margin obtusely angulately convex, posterior margin subrectangulately excavate, 1.6 times wider at base than long in middle line, margins subfoliate, disc excavate. Frons (Fig.2) with median carina, 1.4 times longer in middle line than the widest part, with median carina and lateral carina, two sublateral carinae reaching to and ending at lateral margins. Clypeus disc convex, with diagonal stripes in lateral margins. Rostrum slightly surpassing mesotrochanters. Pronotum with a small pit near midline on each side, without median carinae. Mesonotum triangular, with median carinae, each side with a convexity. Tegmina (Fig.3) subquadrate, longitudinal veins distinct, without cross veins. Radius and Mediana simple not forked; Cubitus anterior bifurcate. Hindwings (Fig.4) deeply incised on apical margin into two lobes, anal lobe absent, veins simple, reticulate apically. Pro- and mesofemora compressed. Hind tibiae with two teeth near apex. Spinal formula of hind leg 8-13-2. Male genitalia: Anal segment in dorsal view subquadrate, with three lobes in apical margin, each with an angular convexity in lateral margin near base; anal foramen near middle (Fig.6). Genital styles in lateral view oval, with process like a hook in middle of dorsal margin (Fig.9). Aedeagus shallowly U-shaped in lateral view, with lateral, ventral and dorsal lobes; dorsal margin of aedeagus with a fan-like process near base; aedeagus with a pair of ventral hooks blade-like apically, directed cephalad (Figs.7, 8). Material examined Holotype: ♂, China: Guizhou Province, Weining, 21 Aug. 1986, Li Zi-Zhong. Paratypes: 2 ♂♂, 4♀♀, same data as for holotype. Remarks This new species is similar to N. postfasciatum Fennah, but differs from the latter in: (1) the frons with submedian carina attaining lateral margins (Fig.2); (2) in dorsal view, the lobes of anal segment with lateroapical margin sharp (Figs.5, 6); (3) ventral processes of aedeagus narrowing and tapering suddenly near apex (Figs.7, 8); (4) spinal formula of hind leg 8-13-2. Etymology The specific name refers to the type locality, Weining, Guizhou Province. Distribution Southwest China (Guizhou).Published as part of Zhang, Zheng-Guang & Chen, Xiang-Sheng, 2008, Two new species of the Oriental genus Neodurium Fennah (Hemiptera: Fulgoromorpha: Issidae) from Southwest China, pp. 63-68 in Zootaxa 1785 (1) on pages 65-66, DOI: 10.11646/zootaxa.1785.1.4, http://zenodo.org/record/512434
Dynamic Activity Analysis Model Based Win-Win Development Forecasting Under the Environmental Regulation in China
No full textPorter Hypothesis states that environmental regulation may lead to win-win opportunities, that is, improve the productivity and reduce the undesirable output simultaneously. Based on directional distance function, this paper proposes a novel dynamic activity analysis model to forecast the possibilities of win-win development in Chinese Industry between 2009 and 2049. The evidence reveals that the appropriate energy-saving and emission-abating regulation will result in both the improvement in net growth of potential output and the steadily increasing growth of total factor productivity. This favors Porter Hypothesis.Dynamic Activity Analysis Model, Energy-Saving and Emission-Abating, Environmental Regulation, Win-Win Development
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