376,726 research outputs found
Louis Chen lecture
No full textSide A. 1. Sibelius #1. 2. Louis Chen lecture -- Side B. 1. All L. Chen's lect.Live recording (lecture)Possibly reproduced from other commercial recording or radio broadcast (Pending for review) (Sibelius' piece)Electronic reproduction from Rulan Chao Pian Audio Cassette Collection.Performers, unknown.Spoken in Chinese and English
Replication Data for: Chen S, Christensen T, Ma L. Reputation Management and Administrative Reorganization: How Different Media Reputation Dimensions Matter for Agency Termination. Journal of Public Administration Research and Theory. 2022, https://doi.org/10.1093/jopart/muac028
No full textReplication Data for: Chen S, Christensen T, Ma L. Reputation Management and Administrative Reorganization: How Different Media Reputation Dimensions Matter for Agency Termination. Journal of Public Administration Research and Theory. 2022, https://doi.org/10.1093/jopart/muac02
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
Cobitis oxycephala Chen YX & Chen YF 2018, sp. nov.
No full textCobitis oxycephala Chen YX & Chen YF, sp. nov. (Figs 2–7) Cobitis sinensis Chen, 1986 (nec. Sauvage & Dabry, 1874): 145 (Hainan, fig. 81). Cobitis taenia dolichorhynchus Nichols & Popo, 1927 (nec. Nichols, 1918): 335 (Hainan, fig. 8); Nichols, 1943: 197 (Fukien, Kwangtung, Hainan, fig. 81). Holotype. ♂, IHB 0509273, 67.7 mm TL, 57.9 mm SL, China, Hainan, Ding’an County (19°68′N, 110°36′E; elev. 65 m), the Nandujiang River, July 2005, leg. Kun Li. Paratypes. IHB 0509392–9, 0509401–5, 13♂, 63.1–70.3 mm TL, 51.8– 59.1 mm SL, IHB 509400, 0509406–7, 3♀, 74.6–84.7 mm TL, 61.6–71.6 mm SL, same data as holotype. Diagnosis. The new species can be distinguished from its congeners by possessing the following combination of characteristics: 13–15 large rectangular blotches on L 1; 10–14 elongated blotches on L 5; snout sharp (Figs 2–3); males with a semicircular lamina circularis at the base of the first branched pectoral fin ray (Fig. 4); mental lobes undeveloped, three superficial longitudinal lobes short and bluntly rounded (Fig. 5); suborbital spine thick and curved, with a short processus medio-caudalis (Fig. 6). Cobitis oxycephala Chen YX & Chen YF, sp. nov. is similar to C. sinensis, C. dolichorhynchus and C. zhejiangensis in color pattern (with L 1 –L 5 line on the body) and lamina circularis morphology (plate-like), but differs from them in having snout sharp (vs. rounded); 10–14 horizontally elongated blotches and without the deeper faint dusky band on L 5 (vs. 11–12 rectangular and vertically elongate spots in C. sinensis (Son & Kim, 2002); a row of more or less oval blotches and with the deeper faint dusky band on the mid-lateral line in C. dolichorhynchus (Nichols, 1918); 14–16 short vertical spots in C. zhejiangensis). It further differs from C. dolichorhynchus and C. zhejiangensis in body slender, depth 7.6 in SL in male and 7.7 in female (vs. sturdy, depth 5.8 in SL in male in C. dolichorhynchus (Nichols, 1918); 5.6–6.7 (mean 6.0) in males and 4.3–5.0 (mean 4.7) in females in C. zhejiangensis); 13–15 large rectangular blotches on L 1 (vs. irregular dark cross blotches in C. dolichorhynchus (Nichols, 1918); 13–19 rectangular blotches in C. zhejiangensis). Description (Figs 2–7, Table 2). D. III–7; A. III–5; V. I–6; P. I–6–7; C. IV–14–16–IV. Body moderately slender, compressed. Head small. Snout sharp. Eyes located on upper part and middle of head. Preorbital part of head equal to or longer than postorbital part of head. Mouth small, inferior, with three pairs of short barbels. Length of maxillo-mandibular barbels shorter than diameter of eye. Mental lobes undeveloped, three superficial longitudinal lobes short and bluntly rounded (Fig. 5) Suborbital spine thick and curved, with a short processus medio-caudalis. Processus latero-caudalis long, less than one-third of processus medio-caudalis (Fig. 6). Subdorsal scales small, oval, with a moderately large focal area, 18–20 radial grooves, and 3–5 supplementary ones (Fig. 7). Dorsal fin moderately long, inserted midway between nostril and base of caudal fin. In males, pectoral fins long, second pectoral fin ray longest (Fig. 2). In females, pectoral fins slightly short, third pectoral fin ray longest (Fig. 3). Ventral fins small and short, approximately at same level as second or third branched dorsal-fin ray. Anal fin short, located on half of space between ventral and caudal fins. Anal orifice close to anal fin. Caudal fin long, emarginated tip. Caudal peduncle with ventral adipose crest. Lateral line long, not exceeding length of pectoral fins in males, and exceeding in females. Pigmentation pattern. Color characterized by pigmentation pattern with five longitudinal lines of dark speckles on dorsolateral sides of body (L 1 –L 5 from dorsal to ventral) (Figs 2–3). Color pattern characteristic of sexual dimorphism not observed. Head sprinkled with many black dots, and a black stripe extended from insertion of rostral barbels through eye to occiput. L 1 consisted of a row of 5–6 large rectangular blotches before dorsal fin; 2 on dorsal fin and 6–7 behind dorsal fin. Gap of rectangular blotches smaller than width of blotches. L 2 composed of a line of irregularly small and solitary spots or blotches and not intermingle with gap of large rectangular blotches, and reaching beyond dorsal fin. L 3 composed a narrow stripe beyond anal fin and a row of rounded blotches behind anal fin. L 4 composed of a line of minute black dots, which fused to a line and diminished towards end of ventral fin. L 5 consisted of a row of 10–14 horizontally elongated blotches, without deeper faint dusky band. One small oblique vertical jet blotch at upper base of caudal fin base and far smaller than eye diameter. 4–5 narrow rows of dark dots on dorsal and caudal fins. Sexual dimorphism. Males smaller than females with proportionally longer pectoral fins. In males, second pectoral fin ray thickened and elongated, a semicircular lamina circularis at base of first branched pectoral fin ray. In females, third pectoral fin ray elongated. Distribution. This new species occurs in the Nandujiang River, Hainan, China (Fig. 1). Etymology. The species name is derived from the Greek oxys, meaning sharp, and kephale meaning head, in reference to the pointed head of the species.Published as part of Chen, Yongxia, Chen, Hao, He, Dekui & Chen, Yifeng, 2018, Two new species of the genus Cobitis (Cypriniformes: Cobitidae) from South China, pp. 156-168 in Zoological Systematics 43 (2) on pages 160-162, DOI: 10.11865/zs.201814, http://zenodo.org/record/461768
Largusoperla borisi Chen 2018
No full textLargusoperla borisi Chen, 2018b Largusoperla borisi Chen 2018b. Zootaxa, 4450(4): 496. Specimen status: male holotype, CZT-PLE-MA4 (ICJUST). Remarks. The hammer of L. borisi is not visible in the holotype. But it can be distinguished from other congeners by the paraprocts strongly sclerotized, long triangular, inner margin concave, outer margin convex, apex obtuse and triangular (Fig. 1, Fig. 2C).Published as part of Chen, Zhi-Teng & Wang, Bo, 2019, Review of the fossil genus Largusoperla (Plecoptera: Perlidae): Annotated checklist, taxonomic identification, and description of a new species, pp. 281-291 in Zootaxa 4565 (2) on page 283, DOI: 10.11646/zootaxa.4565.2.12, http://zenodo.org/record/258979
Adaptive Minimum-BER Linear Multiuser Detection for DS-CDMA Signals in Multipath Channels
No full textThe problem of constructing adaptive minimum bit error rate (MBER) linear multiuser detectors is considered for direct-sequence code division multiple access (DS-CDMA) signals transmitted through multipath channels. Based on the approach of kernel density estimation for approximating the bit error rate (BER) from training data, a least mean squares (LMS) style stochastic gradient adaptive algorithm is developed for training linear multiuser detectors. Computer simulation is used to study the convergence speed and steady-state BER misadjustment of this adaptive MBER linear multiuser detector, and the results show that it outperforms an existing LMS-style adaptive MBER algorithm first presented at Globecom'98 by Yeh, Lopes and Barry
Adaptive Minimum Bit Error Rate Beamforming
No full textAn adaptive beamforming technique is proposed based on directly minimizing the bit error rate. It is demonstrated that this minimum bit error rate (MBER) approach utilizes the antenna array elements more intelligently, than the standard minimum mean square error (MMSE) approach. Consequently, MBER beamforming is capable of providing significant performance gains in terms of a reduced bit error rate over MMSE beamforming. A block-data adaptive implementation of the MBER beamforming solution is developed based on the Parzen window estimate of probability density function. Furthermore, a sample-by-sample adaptive implementation is considered, and a stochastic gradient algorithm, referred to as the least bit error rate, is derived. The proposed adaptive MBER beamforming technique provides an extension to the existing work (Mulgrew and Chen 2001, Chen et al 2001} for adaptive MBER equalization and multiuser detection
Corrigendum to “General reduced vehicle model for simulating truck-bridge pier collisions” [Dev. Built. Environ. 16 (2023) 100233] (Developments in the Built Environment (2023) 16, (S2666165923001151), (10.1016/j.dibe.2023.100233))
No full textThe authors regret there were two errors in the authors' affiliation in the published article. First, the affiliation of the first author (Daogang Ou) should only be the School of Civil Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China. Second, the corresponding author (Lin Chen) should have two affiliations; the first one should be: School of Civil Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China; and the second one should be: Key Laboratory of Building Safety and Energy Efficiency of Ministry of Education, Hunan University, Changsha, 410082, China. The authors would like to apologise for any inconvenience caused
Cobitis brachysoma Chen YX & Chen YF 2018, sp. nov.
No full textCobitis brachysoma Chen YX & Chen YF, sp. nov. (Figs 8–17) Cobitis sinensis Ye, 1991 (nec. Sauvage & Dabry, 1874): 253 (Guangdong); Jia et al., 2013: 1492 (Zengjiang River, Guangdong). Holotype. ♂, HU 1506334, 55.2 mm TL, 47.1 mm SL, China: Guangdong, Guangning County (23°64′N, 112°44′E; elev. 65 m), the Suijiang River (a tributary of the Pearl River), April 2015, leg. Yongxia Chen. Paratypes. HU 1505204, 1505207, 1506320, 1506326, 1506330, 5♂, 50.5–71.4mm TL, 43.1–58.6mm SL, HU 1505209, 1505289, 1505292, 1505296, 1506290, 1506302, 1506307, 1506315, 1506322, 1506325, 1506328, 1506331–3, 1506336, 15♀, 53.1–74.2 mm TL, 44.7– 61.5 mm SL, same data as holotype. Other material examined. HU 1506360, 1506369, 1600080, 1600083, 1600086, 5♂, 47.4–74.4 mm TL, 39.5–63.6 mm SL, HU 1506341–2, 1506349, 1600081, 1600084–5, 6♀, 51.2–61.6 mm TL, 42.3– 52.9 mm SL, China: Guangdong, Yangjiang County (21°86′N, 111°98′E; elev. 65 m), the Nalongjiang River (a tributary of the Moyangjiang River), April 2015, leg. Yongxia Chen. HU 1608048–9, 1608052–4, 5♂, 50.4–60.8mm TL, 42.9–52.4 mm SL, HU 1608040–1, 1608043–7, 1608050–1, 9♀, 59.4–92.3 mm TL, 51.3–78.7 mm SL, China: Guangdong, Longmen County (23°73′N, 114°25′E; elev. 65 m), the Zengjiang River (a tributary of the Pearl River), September 2016. leg. Yongxia Chen. Diagnosis. The new species can be distinguished from its congeners by possessing the following combination of characteristics: small body size, SL mean 50 mm in males and 60 mm in females; a small jet spot far smaller than the eye diameter on the upper part of the caudal peduncle; 7–8 narrow rows of dark spots on the caudal fin (Figs 8–9, 14–17); males with a slender and finely serrated lamina circularis at the base of the first branched pectoral fin ray (Fig. 10); mental lobes undeveloped, two superficial longitudinal lobes short and bluntly rounded (Fig. 11); suborbital spine straight, with long processus medio-caudalis (Fig. 12). Cobitis brachysoma Chen YX & Chen YF, sp. nov. is similar to C. microcephala in body size and shape of lamina circularis, but differs from it in having long processus medio-caudalis of suborbital spine (vs. short); caudal peduncle short, length of caudal peduncle 7.3–9.2 (mean 8.4) in SL in males and 7.0–9.9 (mean 8.5) in females (vs. caudal peduncle long, length of caudal peduncle 5.9–6.6 (mean 6.3) in SL in males and 5.3–7.2 (mean 6.3) in females); body slender, depth 6.1–6.6 (mean 6.4) in SL in males and 5.5–8.6 (mean 6.8) in females (vs. sturdy, depth 5.8–6.2 (mean 5.9) in SL in males and 5.0–6.5 (mean 5.6) in females). Description (Figs 8–17, Table 2). D. III–7; A. III–5; V. I–6; P. I–7–8; C. IV–14–16–IV. Body small, elongated, and compressed. Head small and compressed. Snout rounded. Eyes located on upper part and middle of head. Preorbital part of head shorter than postorbital part of head. Mouth small, inferior, with three pairs of short barbels. Length of maxillomandibular barbels longer than diameter of eye. Mental lobes undeveloped, two superficial longitudinal lobes short and bluntly rounded (Fig. 11). Suborbital spine bifid, relatively slender and straight, with a long processus medio-caudalis. Processus latero-caudalis short, less than one-fifth of processus medio-caudalis (Fig. 12). Subdorsal scales small and oval, with a larger focal area, 17–21 radial grooves, and 4–8 supplementary ones (Fig. 13). Dorsal fin long, inserted midway of body; dorsal fin slightly shorter than head length. In males, pectoral fins moderately long, second pectoral fin ray longest (Fig. 15). In females, pectoral fins slightly shorter, third pectoral fin ray longest (Fig. 17). Ventral fins short, small, and approximately at same level as third branched dorsal-fin ray. Anal fin moderately long, located on half of space between ventral and caudal fins and not reach caudal fin. Anal orifice close to anal fin. Caudal fin emarginated tip. Caudal peduncle with ventral adipose crest. Lateral line short, not exceeding length of pectoral fins. Pigmentation pattern. Color pattern characteristic of sexual dimorphism not observed. Head sprinkled with many black dots, and a black stripe extended from the insertion of rostral barbels to eye. L 1 consisted of a row of 5–7 rectangular blotches before dorsal fin that became less regular behind head; 2 on dorsal fin and 6–7 behind dorsal fin. Gap of rectangular blotches larger than width of blotches. L 2 composed of a line of irregularly small spots and that diminished towards end of caudal fin. L 3 composed of a row of horizontally elongated or rounded blotches and diminished towards end of caudal fin. L 4 composed of a line of minute black dots and diminished towards end of caudal fin. L 5 consisted of a row of 11–12 horizontally elongated or rounded blotches. One small jet spot on upper half of caudal fin base and far smaller than eye diameter. 7–8 narrow rows of dark dots on dorsal and caudal fins. Sexual dimorphism. Males smaller than females with proportionally longer pectoral, ventral and anal fins. In males, second pectoral fin ray thickened and elongated, a slender and finely serrated lamina circularis at base of first branched pectoral fin ray. In females, third pectoral fin ray elongated. Distribution. This new species occurs in the Suijiang River (a tributary of the Pearl River) in Guangning County, the Zengjiang River (a tributary of the Pearl River) in Longmen County, and the Nalongjiang River (a tributary of the Moyangjiang River) in Yangjiang County, all from Guangdong, China (Fig. 1). Etymology. The species name is derived from the Greek brachys, meaning short, and soma meaning body, in reference to the short body of the species.Published as part of Chen, Yongxia, Chen, Hao, He, Dekui & Chen, Yifeng, 2018, Two new species of the genus Cobitis (Cypriniformes: Cobitidae) from South China, pp. 156-168 in Zoological Systematics 43 (2) on pages 162-165, DOI: 10.11865/zs.201814, http://zenodo.org/record/461768
A Rosary of Rubies: The Chronicle of the Gur-rigs mDo-chen Tradition from South-Western Tibet
Full text linkThe mDo-chen bKa’-brgyud-pa school represents a little known Buddhist tradition from Mang-yul Gung-thang in south-western Tibet. It goes back to a Buddhist yogin known as Ma-bdun-pa or Ma-bdun ras-chen (12th/13th c.) and was later mainly spread by members of the Gur family. Although belonging to the “Upper ’Brug” (stod ’brug) branch of the ’Brug-pa bKa’-brgyud-pa school, the mDo-chen tradition has always been deeply infused with the “spoken teachings” (bka’ ma) and “treasure teachings” (gter ma) of the rNying-ma-pa school, and the cult of the “Seven Ma-mo Sisters” (ma mo mched bdun) was particularly practised and transmitted by its members. This book presents a critical edition, an annotated translation and a photographic reproduction of a manuscript copy of a rare chronicle of the Gur-rigs mDo-chen tradition written by Brag-dkar rta-so sPrul-sku Chos-kyi dbang-phyug (1775–1837). The text provides us with an overview of the tradition’s development mainly through biographical accounts but also through prophecies, prayers and praises for individual masters. The study concludes with two appendices based on the mDo chen bka’ brgyud gser ’phreng, a lineage history composed in the 15th century, and the “records of teachings received” (thob yig) of three important members of the Gur family, thus allowing us to gain an insight into the transmissions of the mDo-chen bKa’-brgyud-pa school and the interactions of its representatives with other important Buddhist teachers up to the 18th century. The present work is a further outcome of the author’s investigations into the cultural and religious traditions of south-western Tibet and the neighbouring Himalayan valleys
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