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The system identification and control of Hammerstein system using non-uniform rational B-spline neural network and particle swarm optimization
No full textIn this paper a new system identification algorithm is introduced for Hammerstein systems based on observational input/output data. The nonlinear static function in the Hammerstein system is modelled using a non-uniform rational B-spline (NURB) neural network. The proposed system identification algorithm for this NURB network based Hammerstein system consists of two successive stages. First the shaping parameters in NURB network are estimated using a particle swarm optimization (PSO) procedure. Then the remaining parameters are estimated by the method of the singular value decomposition (SVD). Numerical examples including a model based controller are utilized to demonstrate the efficacy of the proposed approach. The controller consists of computing the inverse of the nonlinear static function approximated by NURB network, followed by a linear pole assignment controller
Skyrmion-skyrmion and skyrmion-edge repulsions in skyrmion-based racetrack memory
No full textMagnetic skyrmions are promising for building next-generation magnetic memories and spintronic devices due to their stability, small size and the extremely low currents needed to move them. In particular, skyrmion-based racetrack memory is attractive for information technology, where skyrmions are used to store information as data bits instead of traditional domain walls. Here we numerically demonstrate the impacts of skyrmion-skyrmion and skyrmion-edge repulsions on the feasibility of skyrmion-based racetrack memory. The reliable and practicable spacing between consecutive skyrmionic bits on the racetrack as well as the ability to adjust it are investigated. Clogging of skyrmionic bits is found at the end of the racetrack, leading to the reduction of skyrmion size. Further, we demonstrate an effective and simple method to avoid the clogging of skyrmionic bits, which ensures the elimination of skyrmionic bits beyond the reading element. Our results give guidance for the design and development of future skyrmion-based racetrack memory
Stenus frater L. Benick 1916
No full text9. Stenus frater L. Benick, 1916 (Fig. 4) Stenus frater L. Benick, 1916: 247. Stenus cinctiventris Cameron, 1938: 149; Puthz, 1998: 150. Material examined. China: Guangdong: Shenzhen: 1♂ 8♀♀, Mt.Qiniang, mixed leaf litter, sifted, 22°32’28.73’’N, 114°35’8.46’’E, alt. 45m, 25.III.2019, Tang, Shuai, Zhao, Zhou & Xia leg. (SHNU); 1♂, Mt. Wutong, Taishanjian, mixed leaf litter, sifted, 22°35’50.94’’N, 114°10’47.96’’E, alt. 400m, 26.III.2019, Tang, Shuai, Zhao, Zhou & Xia leg. (SHNU). Distribution. China (Hongkong, Guangdong); Vietnam; Indonesia.Published as part of Tang, Liang, Xu, Wang & Xia, Mei-Hua, 2019, A study on the genus Stenus Latreille from Shenzhen City of Guangdong, South China (Coleoptera, Staphylinidae), pp. 365-374 in Zootaxa 4615 (2) on page 368, DOI: 10.11646/zootaxa.4615.2.8, http://zenodo.org/record/324476
Stenus spurius L. Benick 1929
No full text10. Stenus spurius L. Benick, 1929 Stenus spurius L. Benick, 1929: 260. Stenus takaoensis Puthz, 1971: 20; Puthz, 1974: 165. Material examined. China: Guangdong: Shenzhen: 1♀, Mt. Qiniang, mixed leaf litter, sifted, 22°32’28.73’’N, 114°35’8.46’’E, alt. 45m, 25.III.2019, Tang, Shuai, Zhao, Zhou & Xia leg. (SHNU) Distribution. China (Taiwan, Guangdong, Hongkong), Japan, Philippines, Indonesia, Laos. New to Guangdong.Published as part of Tang, Liang, Xu, Wang & Xia, Mei-Hua, 2019, A study on the genus Stenus Latreille from Shenzhen City of Guangdong, South China (Coleoptera, Staphylinidae), pp. 365-374 in Zootaxa 4615 (2) on page 368, DOI: 10.11646/zootaxa.4615.2.8, http://zenodo.org/record/324476
Lepiota atrobrunneodisca L. Fan, L. Xia & N. Mao 2023, sp. nov.
No full textLepiota atrobrunneodisca L. Fan, L. Xia & N. Mao, sp. nov. (Figs. 3) Mycobank:—MB846287 Diagnosis:—Most similar to L. neophana Morgan (1906: 248) but differs by the slightly larger basidiospores (5–7 × 3–4 μm), darker center of pileus and annulus often adhering to stipe, and the pileus surface that breaks up into squamules. Etymology:—‘ atrobrunneodisca ’, refers to the pileus with dark brown central umbonate disc of this species. Holotype:— CHINA. Shanxi Province, Wuzhai County, Guancenshan Mountains, 38°52’26’’N, 111°57’48’’E, 1,990 m elev., 1 August 2018, on the ground in coniferous forest dominated by Larix gmelinii var. principis-rupprechtii (Mayr) Pilger in Engler & Prantl (1926: 327), H. Liu (HSA 115). Description:— Basidiomes small to medium. Pileus 22–63 mm diam, hemispherical to obtusely conical when young, then expanding to convex, applanate with distinct umbo; surface dry, at first smooth, later irregularly cracking into squamules, not uplifted from surface, irregularly shaped, dark brown (#3f1010) to black brown (#2b0b0b) at center, brown (#7c4f1f) to pale yellow-brown (#cd8334) towards the margin on a whitish background. Lamellae close, l = 1–2, free, white (#ffffff); edge smooth, whiter. Stipe 55–80 × 4–6 mm, central, cylindrical, equal or sometimes slightly broadened at base, hollow, smooth, pale yellow-brown (#e6c19a) to pale white (#f2f2f2). Annulus cuff-like, cottony or membranous, white, attached at the upper part of stipe but easily falling off. Context concolorous with lamellae, but sometimes with pale pink shadow. Odor not recorded. Taste not recorded. Spore print white. Basidiospores [25/2/2] 5–7 × 3–4 μm; [Q = (1.38–) 1.5–2.0, Q av = 1.73 ± 0.24]; in side-view ellipsoid to narrowly ellipsoid, with an acute apex, in front-view ovoid, binucleate, non-dextrinoid, reddish purple in cresyl blue, smooth, thin-walled, usually containing one droplet. Basidia 22–32 × 6–10 μm, hyaline, (2–)4-spored, clavate. Cheilocystidia numerous, 30–45 × 8–13 μm, most narrowly clavate, pyriform to almost sphaeropedunculate, hyaline. Pleurocystidia absent. Pileus covering a hymeniderm made up of tightly packed subglobose, sphaeropedunculate to clavate, terminal elements of different lengths, 28–65 × 11–25 µm, mostly 1-celled, but also 2–3-celled, with brownish intracellular pigment, slightly thick-walled. Clamp connections present in all tissues. Habit and distribution:—solitary or scattered on the ground in coniferous forest dominated by Larix gmelinii var. principis-rupprechtii, Shanxi Province, China. Additional specimen examined:— CHINA. Shanxi Province, Wutai County, Wutai Mountain, 38°57’58’’N, 113°30’60’’E, 2,086 m elev., 27 August 2019, on the ground in coniferous forest dominated by Larix gmelinii var. principis-rupprechtii, Y Shen (BJTC FM889).Published as part of Mao, Ning, Xia, Lu, Xu, Yu-Yan & Fan, Li, 2023, Lepiota atrobrunneodisca (Agaricaceae, Agaricales), a new species with a hymeniform pileus covering from North China, pp. 186-198 in Phytotaxa 595 (2) on pages 194-195, DOI: 10.11646/phytotaxa.595.2.5, http://zenodo.org/record/790588
Fig 1. – Dendrocalamus velutinus N.-H. Xia, V. T. Nguyen & V. D in Dendrocalamus velutinus N.-H. Xia, V. T. Nguyen & V. D. Vu (Poaceae), a new species from Vietnam
No full textFig 1. – Dendrocalamus velutinus N.-H. Xia, V. T. Nguyen & V. D. Vu. A. Culm and dormant bud; B. Culm sheath (abaxial view); C. Culm sheath (adaxial view); D. Leaf; E. Leaf ligule; F. Flowering branch; G. Pseudospikelet; H. Prophyll; I. Glume; J. Lemma; K. Palea; L. Pistil; M. Anther. [A-C: V. T. Nguyen NVT224, FSIV; D-M: V. T. Nguyen NVT260, FSIV] [Drawn by V. T. Nguyen]Published as part of Nguyen, Van Tho, Le, Viet Lam, Vu, Van Dung & Xia, Nian-He, 2012, Dendrocalamus velutinus N.-H. Xia, V. T. Nguyen & V. D. Vu (Poaceae), a new species from Vietnam, pp. 255-259 in Candollea 67 (2) on page 257, DOI: 10.15553/c2012v672a6, http://zenodo.org/record/571021
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Streptomyces gossypiisoli Zhang & Qin & Luo & Xia 2021, SP. NOV.
No full textDESCRIPTION OF STREPTOMYCES GOSSYPIISOLI SP. NOV. Streptomyces gossypiisoli (gos.sy.pi.i.so'li. N.L. neut. n. Gossypium the botanical genus name of the cotton plant; L. neut. n. solum soil; N.L. gen. n. gossypiisoli of cotton soil). Produces extensively branched substrate mycelia and aerial hyphae after cultivation for 1 week at 37 °C on Cochrane one agar medium. The aerial hyphae are white and welldeveloped. The spores are short, straight rod-shaped and distributed in clusters. The pH and NaCl tolerance ranges for growth are 5.0–9.0 (optimum, pH 7.0–8.0), and 0–7 % (w/v; optimum, 1% w/v), respectively. The temperature range for growth is from 16 to 45 °C (optimum, 37 °C). Good growth occurs on ISP 2 medium, PDA and Cochrane one medium; weak growth occurs on ISP 1, ISP 3, ISP 4, ISP 5, ISP 6, and ISP 7 media and nutrient agar. Red diffusible pigment is produced on all media tested. Uses D-mannitol,D-glucose,D-fucose,D-fructose,L-rhamnose, D-galactose, lactose, raffinose and sucrose as sole carbon sources; does not use L-arabinose, D-xylose, D-fructose and D-ribose as sole carbon sources. Positive for urease, catalase, cellulose hydrolysis, lipase production, starch hydrolysis, milk coagulation, gelatin hydrolysis, nitrate reduction and oxidase production, but negative for production of H2S. The diagnostic whole-cell wall amino acid is LL-diaminopimelic acid. The whole-cell sugars are glucose and ribose. The major cellular fatty acids include iso-C 16:0, C 16:0, anteiso-C 15:0, anteiso-C 17:0, iso-C 14:0 and iso-C 15:0. The polar lipids include DPG, PE, PC, PI and PIM. The major menaquinones are MK-9(H 10), MK-9(H 6) and MK-9(H 4). The genomic DNA G+C content of the type strain TRM 44567 T is 70.8 mol%. The type strain, TRM 44567 T (=KCTC 39957 T =CCTCC AA2017011 T), was isolated from a cotton field in Xinjiang Uygur Autonomous Region, northwest PR China. The GenBank /EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain TRM 44567 T is MN548415. The TRM 44567 T genome sequence was deposited in GenBank (JACAOI000000000).Published as part of Zhang, Qiao-Yan, Qin, Song, Luo, Xiao-Xia & Xia, Zhan-Feng, 2021, Streptomyces gossypiisoli sp. nov., isolated from cotton soil in Xinjiang, PR China, pp. 1-6 in International Journal of Systematic and Evolutionary Microbiology (004561) (004561) 71 (1) on pages 4-5, DOI: 10.1099/ijsem.0.004561, http://zenodo.org/record/604868
Inactivation of Factor XIa by Plasma Protease Inhibitors
No full textFactor XIa is a plasma protease that, by activating Factor IX, plays an important role in the early phase of the intrinsic pathway of blood coagulation. Four plasma protease inhibitors, alpha(1)-protease inhibitor, antithrombin III, C1-inhibitor, and alpha(2)-plasmin inhibitor, have been reported to inactivate human Factor XIa, but their quantitative contribution to the inactivation of Factor XIa in plasma has not been fully assessed. Using purified systems, we observed that the second-order rate constants for the reaction of Factor XIa with alpha(1)-protease inhibitor, antithrombin III, and CI-inhibitor were 4.08, 10, and 14.6 M(-1) min(-1) x 10(3), respectively. The pseudo-first-order rate constants, at plasma concentration of the inhibitors, were 1.86 x 10(-1), 4.68 x 10(-2), and 2.4 x 10(-2) min(-1), respectively. These kinetic data predict that alpha(1)-protease inhibitor should account for 68%, antithrombin III for 16%, and C1-inhibitor and the equipotent alpha(2)-plasmin inhibitor each for 8% of the total inhibitory activity of plasma against Factor XIa. The rate of inactivation of Factor XIa in various plasma samples specifically deficient in inhibitors was consistent with these predictions.Factor XI, the zymogen form of Factor XIa, circulates in plasma associated with the contact system cofactor, high molecular weight kininogen (HMW kininogen). Kinetic analysis indicated the existence of a reversible bimolecular Factor XIa-HMW kininogen complex with a dissociation constant (K(d)) = 0.17 muM. The light chain derived from HMW kininogen decreased the inactivation rate of Factor XIa by C1-inhibitor with a K(d) of 0.08 muM for a complex of Factor XIa and the light chain derived from HMW kininogen. The protective effect of HMW kininogen was confirmed by the finding that the inactivation rate of Factor XIa in kininogen-deficient plasma was increased over normal plasma.The present study confirms that alpha(1)-protease inhibitor is the major inhibitor of Factor XIa in plasma, and that the formation of a reversible complex between Factor XIa and HMW kininogen decreases the rate of inactivation of the enzyme by its inhibitors
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