192,084 research outputs found
Blind joint maximum likelihood channel estimation and data detection for SIMO systems
No full textA blind adaptive scheme is proposed for joint maximum likelihood (ML) channel estimation and data detection of single-input multiple-output (SIMO) systems. The joint ML optimisation over channel and data is decomposed into an iterative optimisation loop. An efficient global optimisation algorithm called the repeated weighted boosting search is employed at the upper level to optimally identify the unknown SIMO channel model, and the Viterbi algorithm is used at the lower level to produce the maximum likelihood sequence estimation of the unknown data sequence. A simulation example is used to demonstrate the effectiveness of this joint ML optimisation scheme for blind adaptive SIMO systems
Ethusina dilobotus Chen 1993
No full text<i>Ethusina dilobotus</i> Chen, 1993 <p>(Fig. 1)</p> <p> <i>Material examined. –</i> 1 male, 8.0 by 8.2 mm (NTOU), Station CD 129, 22 5.89’N, 121 5.21’E, 1271-1275 m, coll. TAIWAN 2001, R. V. “Ocean Researcher 1”, 21 Aug.2001.</p> <p> <i>Remarks. –</i> The present male specimen (especially the pereoipod proportions and form of the G1) agree best with the description and figures of <i>E. dilobotus</i> by Chen (1993: 338, Fig. 17), although it was described (and only known) on the basis of one specimen from New Caledonia. The carapace of the present specimen, however, seems to have the lateral carapace margin less distinctly convex compared to that figured by Chen (1993: Fig. 17a) and the median frontal tooth also appears to be relatively stronger. The significance of these differences is difficult to assess; and will require more material.</p>Published as part of <i>Ng, Peter K. L. & Ho, P. - H., 2003, On The Deep-Water Dorippid Crabs Of The Genus Ethusina Smith, 1884 (Crustacea: Decapoda: Brachyura) From Taiwan, pp. 71-85 in Raffles Bulletin of Zoology 51 (1)</i> on page 72, DOI: <a href="http://zenodo.org/record/4619337">10.5281/zenodo.4619337</a>
Herpothallon capilliferum P. F. Chen & L. L. Zhang 2022, sp. nov.
No full text<i>Herpothallon capilliferum</i> P.F. Chen & L.L. Zhang, <i>sp. nov</i>. (Figure 1) <p>Mycobank number: 839108</p> <p> <b>Type:</b> — CHINA. Zhejiang: Lishui City, Jingning County, Dayang Lake Nature Reserve. 1405.34 m elev., 27°52′11.43″ N, 119°43′51′′ E, on bark of <i>Nyssa sinensis</i> Oliv., 3 December 2020, C. G. Zhao & L. L. Zhang 20200807 (Holotype in SDNU).</p> <p> <b>Description:—</b> Thallus corticolous, up to 4 cm in diam., loosely appressed to the substrate, sometimes flaking off, minutely felty, dull, pale mineral grey to olivaceous green; in section up to 100 µm thick, with abundant calcium oxalate crystals throughout the thallus. Hypothallus whitish, byssoid, composed of 1–2 µm wide hyphae. Prothallus up to 1 mm broad, byssoid, composed of interwoven and radiating hyphae, whitish. Pseudisidia numerous, irregular, globose, unbranched, byssoid, with abundantly projecting hyphae, mostly white but sometimes green in parts, up to 0.4 × 0.2 mm. Photobiont <i>Trentepohlia</i>, single to aggregated, cells globose, 7–10 × 5–7 µm, yellowish green. Asci and pycnidia not seen.</p> <p> <b>Chemistry and spot tests:—</b> Thallus and prothallus K+ yellow and then red, C–, P+ yellow, I–. TLC: norstictic acid.</p> <p> <b>Etymology:—</b> The epithet “ <i>capilliferum</i> ” refers to the hair-like appearance of pseudisidia.</p> <p> <b>Ecology and distribution:</b> —The new species was found growing on <i>Nyssa sinensis</i> Oliv., in Dayang Lake Nature Reserve of Zhejiang Province.</p> <p> <b>Specimen examined:—</b> CHINA. Zhejiang: Lishui City, Jingning County, Dayang Lake Nature Reserve. 1405.34 m elev., on bark of <i>Nyssa sinensis</i> Oliv., 3 December 2020, C. G. Zhao & L. L. Zhang 20200808, 20200809 (SDNU).</p> <p> <b>Note:—</b> This species is characterized by pseudisidia with many projecting hyphae and the presence of norstictic acid as a major secondary metabolite. <i>Herpothallon coralloides</i> Jagadeesh (2014: 40) is also pseudoisidiate and contains norstictic acid, but it has a pale green to whitish grey thallus that also contains confluentic acid and much larger pseudisidia (up to 1.0 × 0.1mm) that are felty, but without projecting hyphae (Jagadeesh 2014). The morphologically most similar species is <i>Crypthonia albida</i> (Fée) Frisch & G. Thor (2010: 290) but <i>C. albida</i> contains psoromic acid and pseudisidia that are larger (up to 1.0 × 0.5 mm). Another morphologically similar species is <i>H. minimum</i> Aptroot & Lücking (2009: 53), it is the only known <i>Herpothallon</i> species that produces 2’-O-methylperlatolic acid (Aptroot <i>et al.</i> 2009).</p>Published as part of <i>Chen, Pengfei, Liu, Linlin, Xie, Congmiao & Zhang, Lulu, 2022, Four new species of Herpothallon (Arthoniaceae, Arthoniales, Arthoniomycetes, Ascomycota) from China, pp. 83-91 in Phytotaxa 536 (1)</i> on page 84, DOI: 10.11646/phytotaxa.536.1.5, <a href="http://zenodo.org/record/6224563">http://zenodo.org/record/6224563</a>
Papiliomyces puniceum Z. H. Chen & L. Xu 2023, sp. nov.
No full textPapiliomyces puniceum Z.H. Chen & L. Xu, sp. nov. (Figure 1) MycoBank no.: MB 843059 Etymology: Referring to the puniceus stromata. Stromata arising from the head of the insect buried in soil, clavate, solitary, red, fleshy, 21.5 × 3.9 mm; Fertile part immature. Colonies on PDA medium reaching 36 mm in diameter after 16 days of cultivation at 25 °C, white in early days then turning light red. Hyphae septate, hyaline, smooth-walled, 1.2 – 2.2 (X = 1.7 ± 0.3) µm wide. Phialides smooth-walled, hyaline, a little swollen base, slender top, 7.8 – 16.5 × 1.1 – 1.8 (X = 12.6 ± 3.4 × 1.5 ± 0.2) µm. Conidia echinulate, spherical, immature conidia hyaline and mature conidia slight brown, 3.0 – 5.9 (X = 4.8 ± 0.7) µm. Material examined: CHINA. Yunan Province, the Gaoligong Mountains, On the larva of Hepialidae, 20 May 2017, Zi-Hong Chen (BUM838, holotype; KUNCC 4992, ex-type living culture) Notes: The first visible distinction for morphological feature of P. puniceum from the recognized species in Papiliomyces was that it possessed puniceus stromata (Figure 1). Stromata color of its two sister taxa were quite different, P. shibinense being white to faint yellow, but P. liangshanense being yellow. The second dominant feature that confirmed the uniqueness of P. puniceum was that its conidia shape was spherical, echinulate and its conidia color was slight brown (Figure 1).Published as part of Chen, Zi-Hong, Dai, Yong-Dong, Chen, Kai, Zhang, Yi-Fei, Xu, Ling & Wang, Yuan-Bing, 2023, Papiliomyces puniceum and Metarhizium lymantriidae: two new species from the Gaoligong Mountains in southwestern China, pp. 53-63 in Phytotaxa 594 (1) on page 58, DOI: 10.11646/phytotaxa.594.1.3, http://zenodo.org/record/786889
Patient perfectionism and clinician impression formation during an initial interview
No full textHewitt, P. L., Chen, C., Smith, M. M., Zhang, L. C., Habke, M. A., Flett, G. L., & Mikail, S.F. (in press). Patient perfectionism and clinician impression formation during an initial interview. Psychology and Psychotherapy: Theory, Research and Practice
Didymella pomorum Q. Chen & L. Cai, Studies
No full text<p> <i>Didymella pomorum</i> (Thüm.) Q. Chen & L. Cai, Studies in Mycology. 82: 179. 2015 a</p> <p>Description.</p> <p>see Boerema (1993).</p> <p>Materials examined.</p> <p> China, Yunnan Province, from diseased leaves of <i>C. sinensis</i> cv. <i>Dalicha</i>, 22 Jun 2019, Y. C. Wang, culture YCW 196.</p> <p>Notes.</p> <p> <i>Didymella pomorum</i> was introduced as <i>Phoma pomorum</i> before the comprehensive revision of Didymellaceae (Chen et al. 2015 a). Chen et al. (2015 a) regarded four taxa of the respective <i>Phoma pomorum</i> varieties, viz. vars. <i>circinata</i> (CBS 285.76), <i>cyanea</i> (CBS 388.80) and <i>pomorum</i> (CBS 539.66) and the species <i>Ph. triticina</i> (CBS 354.52) to be conspecific and treated them as a single species <i>D. pomorum</i>. Pycnidia produced by this species are usually subglobose-ampulliform with a distinct ostiole (Boerema 1993). It can cause leaf spots on many plants (Boerema 1993; Romero et al. 2021). In the present study, one isolate from diseased tea plant leaves is closely related to <i>D. sinensis</i> with high statistical support (Fig. 2). This is the first report of <i>D. pomorum</i> isolated from <i>C. sinensis</i>.</p>Published as part of <i>Wang, Yuchun, Tu, Yiyi, Chen, Xueling, Jiang, Hong, Ren, Hengze, Lu, Qinhua, Wei, Chaoling & Lv, Wuyun, 2024, Didymellaceae species associated with tea plant (Camellia sinensis) in China, pp. 217-251 in MycoKeys 105</i> on pages 217-251, DOI: 10.3897/mycokeys.105.11953
Herpothallon subglobosum P. F. Chen & L. L. Zhang 2022, sp. nov.
No full text<i>Herpothallon subglobosum</i> P.F. Chen & L.L. Zhang, <i>sp. nov.</i> (Figure 3) <p>Mycobank number: 839110</p> <p>Type:— CHINA. Yunnan: Diqing Tibetan Autonomous Prefecture, Weixi County, Baimaluo. 2100 m elev., 27°45’30.96” N, 99°2’26.53” E, on bark of trees, 7 May 1982, L. S. Wang 82–76 (Holotype in KUN)</p> <p> <b>Description:</b> —Thallus corticolous, up to 5 cm in diam., tightly attached to the substrate, firm, or sometimes flaking off, minutely felty, dull, white to grey, with many calcium oxalate crystals. Hypothallus byssoid, white, composed of 1–2 µm wide hyphae. Prothallus up to 1 mm wide, white, byssoid, composed of interwoven and radiating hyphae. Pseudisidia numerous, of the same colour as the thallus, globular, up to 0.1 × 0.1 mm. Photobiont <i>Trentepohlia</i>, single or a few cells aggregated, cells globose, 5–10 × 4–8 µm, yellowish green. Asci and pycnidia not seen.</p> <p> <b>Chemistry:</b> —Thallus K–, C+ bright red, P–, I– medulla. TLC: gyrophoric acid, lecanoric acid, umbilicaric acid.</p> <p> <b>Etymology:</b> —The epithet “ <i>subglobosum</i> ” refers to globular pseudisidia.</p> <p> <b>Ecology and distribution</b>:— <i>Herpothallon subglobosum</i> was found growing on bark of trees in a subtropical forest of Yunnan Province.</p> <p> <b>Note</b> —This species is characterized by a tightly attached thallus, small globular pseudisidia and the presence of gyrophoric acid, lecanoric acid, umbilicaric acid. Other <i>Herpothallon</i> species with pseudisidia and gyrophoric acid include <i>H. fertile</i> Aptroot & Lücking (2009: 40), <i>H. himalayanum</i> Jagadeesh Ram & Sinha (2009: 40), <i>H. japonicum</i> (Zahlbr.) G. Thor (2009: 44), <i>H. minutum</i> Jagadeesh Ram (2014: 45), and <i>H. philippinum</i> (Vain.) Aptroot & Lücking (2009:56). <i>Herpothallon fertile</i> is a <i>Herpothallon</i> species with asci and ascospores. Other characteristics also distinguish the new species from the non-fertile ones: <i>H. himalayanum</i> has a loosely appressed thallus, with a hypothallus that is mostly lemon yellow and the species has larger pseudisidia (up to 1 × 0.5 mm); <i>H. japonicum</i> has a more distinctly C+ red thallus (gyrophoric acid, ovoic acid, lecanoric acid and 2-O-methyllecanoric acid), cylindrical pseudisidia (up to 0.7 × 0.2 mm) and its thalli lack calcium oxalate (Aptroot <i>et al.</i> 2009); <i>H. minutum</i> has a greenish grey to greyish yellow thallus and dense, minute, granular globular to short cylindrical 0.02–0.06 mm wide pseudisidia (Jagadeesh Ram 2014); <i>H. philippinum</i> has frequent and large, slender pseudisidia.</p>Published as part of <i>Chen, Pengfei, Liu, Linlin, Xie, Congmiao & Zhang, Lulu, 2022, Four new species of Herpothallon (Arthoniaceae, Arthoniales, Arthoniomycetes, Ascomycota) from China, pp. 83-91 in Phytotaxa 536 (1)</i> on page 89, DOI: 10.11646/phytotaxa.536.1.5, <a href="http://zenodo.org/record/6224563">http://zenodo.org/record/6224563</a>
The L-p-to-L-q boundedness of commutators with applications to the Jacobian operator
No full textSupplying the missing necessary conditions, we complete the characterisation of the L-p -> L-q boundedness of commutators [b, T] of pointwise multiplication and Calderon-Zygmund operators, for arbitrary pairs of 1 q, our results are new even for special classical operators with smooth kernels. As an application, we show that every f is an element of L-p(R-d) can be represented as a convergent series of normalised Jacobians J(u) = det del uof u is an element of (over dot(W))(1,dp)(R-d)(d). This extends, from p = 1 to p > 1, a result of Coifman, Lions, Meyer and Semmes about J:. (over dot(W))(1,d)(R-d)(d) -> H-1(R-d), and supports a conjecture of Iwaniec about the solvability of the equation Ju = f is an element of L-p(R-d). (C) 2021 The Author(s). Published by Elsevier Masson SAS.Peer reviewe
Herpothallon viridi-isidiatum P. F. Chen & L. L. Zhang 2022, sp. nov.
No full textHerpothallon viridi-isidiatum P.F. Chen & L.L. Zhang, sp. nov. (Figure 4) Mycobank number: 839111 Type:— CHINA. Zhejiang: Lishui City, Jingning County, Baiyun Protection Station. 1298.73 m elev., 27°43′11.07″ N, 119°38′49.33″ E, on bark of Cunninghamia lanceolata (Lamb.) Hook., 2 December 2020, C. G. Zhao & L. L. Zhang 20200806 (Holotype in SDNU) Description:—Thallus corticolous, up to 3–5 cm in diam., loosely appressed to the substrate, sometimes flaking off, minutely felty, dull, pale mineral greyish-green, in section up to 150 µm thick, with many calcium oxalate crystals in the thallus. Hypothallus byssoid, dirty whitish, composed of 1–3 µm wide hyphae. Prothallus up to 1 mm wide, byssoid, composed of interwoven and radiating hyphae, dirty white in inner and whitish to pale brown in outer parts. Pseudisidia numerous, cylindrical, branched, rather compact yet felty, of the same colour as thallus or often paler in the upper part, up to 0.2 × 0.1 mm. Photobiont Trentepohlia, single or a few cells aggregated, cells globose, 7–12 × 4–8 µm, yellowish green. Asci and pycnidia not seen. Chemistry and spot tests: —Thallus and prothallus K+ yellow, C+ red, P+ pale yellow, I+ blue in medulla. TLC: gyrophoric acid, lecanoric acid, umbilicaric acid and unknown substances. Etymology:— The epithet “ viridi-isidiatum ” refers to the green colour of the pseudisidia. Ecology and distribution: —The new species was found growing on Cunninghamia lanceolata (Lamb.) Hook., at Baiyun Protection Station. Specimen examined:— CHINA. Zhejiang: Lishui City, Jingning County, Baiyun Protection Station. 1298.73 m elev., on bark of Cunninghamia lanceolata (Lamb.) Hook., 2 December 2020, C. G. Zhao & L. L. Zhang 20200810 (SDNU). Note:— This species is characterized by cylindrical pseudisidia with many hyphae on the surface and the presence of gyrophoric acid, lecanoric acid, umbilicaric acid. Although H. philippinum also has a C+ red thallus and prothallus (gyrophoric acid, ± confluentic and/or lecanoric acids), it has felty pseudisidia with projecting hairs (up to 1.0 × 0.1 mm). Herpothallon echinatum Aptroot, Lücking & Will-Wolf (2009: 38) also has a loosely appressed thallus, but contains psoromic acid and lacks calcium oxalate (Aptroot et al. 2009). Another morphologically similar species is H. isidiatum, but the species is characterized by stictic acid and smaller pseudisidia with dark brown to black pycnidia at the tips (Jagadeesh & Sinha 2009).Published as part of Chen, Pengfei, Liu, Linlin, Xie, Congmiao & Zhang, Lulu, 2022, Four new species of Herpothallon (Arthoniaceae, Arthoniales, Arthoniomycetes, Ascomycota) from China, pp. 83-91 in Phytotaxa 536 (1) on pages 89-90, DOI: 10.11646/phytotaxa.536.1.5, http://zenodo.org/record/622456
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