6,950 research outputs found
CUHK electronic theses & dissertations collection
No full textLyu, Kai.Thesis Ph.D. Chinese University of Hong Kong 2015.Includes bibliographical references (leaves 498-539).Abstracts also in Chinese.Title from PDF title page (viewed on 06, December, 2016)
Zuoxiao Lyu - Doctor of Music - Doctoral Recital
No full textPrelude and Fugue in F-sharp Major, from the Well-Tempered Clavier, Book One / J. S. Bach (1685-1750)--Piano Sonata in B-flat Major, Op. 22 : Allegro con brio; Adagio con molto espressione; Menuetto; Rondo Allegretto / Ludwig van Beethoven (1770-1827)--INTERMISSION--Five Bagatelles : Darkly; Leggiero e legato; Untitled; Untitled; Threnody (for all of the innocent victims), Gently / Carl Vine (b. 1954)--Andante Spianato et Grande Polonaise Brillant, Op. 22 / Frederic Chopin (1810-1849)--Concert Etude, Op. 40 No. 3 - "Toccatina" / Nikolai Kapustin (b. 1937)Music, Moores School o
CUHK electronic theses & dissertations collection
No full textLyu, Chen.Thesis Ph.D. Chinese University of Hong Kong 2014.Includes bibliographical references (leaves 148-159).Abstracts also in Chinese.Title from PDF title page (viewed on 04, October, 2016)
QCL-layer_10-4rep-rand-m2A_3A-efield_0-10-150-v22-dataset
No full textThe method for building QC datasets and identifying the laser transition for a design is referenced in [1] A. C. Hernandez, M. Lyu and C. F. Gmachl, "Generating Quantum Cascade Laser Datasets for Applications in Machine Learning," 2022 IEEE Photonics Society Summer Topicals Meeting Series (SUM), 2022, pp. 1-2, doi: 10.1109/SUM53465.2022.9858281.This dataset contains 1800 quantum cascade (QC) structures generated by randomly modifying an initial 10-layer design in the tolerance range of -2 to +3 Angstroms at an applied electric field range of 0 to 150 kV/cm (in 10 kV/cm increments). One structure at one electric field is one design, thus there are 27000 unique designs, represented as a row in the dataset. The layer thicknesses (in angstroms) and the electric field are inputs which get evaluated using a Schrödinger solver, ErwinJr2, to identify the laser transition Figure of Merit (fom*), among other reported outputs.Schmidt DataX Fund at Princeton University, National Science Foundation under Grant No. DGE-2039656, and the Center for Statistics and Machine Learning at Princeton University through the support of MicrosoftQCL-layer_10-4rep-rand-m2A_3A-efield_0-10-150-v22-dataset.csv, README.tx
Appendix_1,_2_and_3 – Supplemental material for Analyzing the Economic Sustainability of Tourism Development: Evidence from Hong Kong
No full textSupplemental material, Appendix_1,_2_and_3 for Analyzing the Economic Sustainability of Tourism Development: Evidence from Hong Kong by Hanqin Qiu, Daisy X. F. Fan, Jiaying Lyu, Pearl M. C. Lin and Carson L. Jenkins in Journal of Hospitality & Tourism Research</p
CUHK electronic theses & dissertations collection
No full textLyu, Peng.Thesis M.Phil. Chinese University of Hong Kong 2015.Includes bibliographical references (leaves 42-44).Abstracts also in Chinese.Title from PDF title page (viewed on 14, November, 2016)
The biotin–avidin interaction in biotinylated gold nanoparticles and the modulation of their aggregation
No full textThe biotin–avidin interaction is used as a binding tool for the conjugation of biomolecules for more diverse applications; these include nanoparticle conjugation. Despite this, a thorough investigation on the different aggregates that may result from the interaction of biotinylated nanopar-ticles (gold nanoparticles, AuNPs, in this work) with avidin has not been carried out so far. In this paper, we address this problem and show the type of aggregates formed under thermodynamic and kinetic control by varying the biotinylated AuNP/avidin ratio and the order of addition of the two partners. The analysis was performed by also addressing the amount of protein able to interact with the AuNPs surface and is fully supported by the TEM images collected for the different samples and the shift of the surface plasmon resonance band. We show that the percentage of saturation depends on the size of the nanoparticles, and larger nanoparticles (19 nm in diameter) manage to accommodate a relatively larger amount of avidins than smaller ones (11 nm). The AuNPs are iso-lated or form small clusters (mostly dimers or trimers) when a large excess or a very low amount of avidin is present, respectively, or form large clusters at stoichiometric concentration of the protein. Daisy-like systems are formed under kinetic control conditions when nanoparticles first covered with the protein are treated with a second batch of biotinylated ones but devoid of avidin
Panophrys daiyunensis Lyu, Wang & Wang 2021, sp. nov.
No full textPanophrys daiyunensis Lyu, Wang & Wang sp. nov. Chresonymy. Megophrys sp18— Liu et al. 2018 Holotype: SYS a001733 (Fig. 3 A–D), adult male, collected by Run-Lin Li on 22 May 2012 from Daiyun Village (25.6362°N, 118.2139°E; ca 1040 m a.s.l.), Daiyun Mountain Nature Reserve, Dehua County, Quanzhou City, Fujian Province, PR China. Paratypes: Three adult males (SYS a001730/ CIB 116075, SYS a001731–1732), collected at the same time from the same locality as the holotype; one adult female (SYS a006002), collected by Jian Wang on 26 June 2017 from the same locality as the holotype; two adult females (SYS a006000, 6003), collected by Zhi-Tong Lyu, Ying-Yong Wang, and Ya-Qiong Huang on 26 June 2017 from Jiuxianshan (25.7101°N, 118.1200°E; ca 1200 m a.s.l.), Daiyun Mountain Nature Reserve. Etymology. The specific epithet daiyunensis refers to the type locality of the new species, the Daiyun Mountain Nature Reserve. Common names. Daiyun Horned Toad (in English) / Dài Yún Jiǎo Chán (ăủfflḃ in Chinese) Diagnosis. (1) body size small, with SVL 27.6–28.7 mm (n = 4) in adult males and 33.7–35.6 mm (n = 3) in adult females; (2) tympanum edge distinct, upper margin in contact with supratympanic fold, TD/ED 0.45–0.53; (3) vomerine teeth present; (4) margin of tongue not notched; (5) heels overlapping or meeting; (6) tibio-tarsal articulation reaching just posterior to eye; (7) TIB/SVL 0.36–0.42, FTL/SVL 0.51–0.60; (8) narrow lateral fringes on fingers present, one subarticular tubercle present at the base of each finger, relative finger lengths I = II 31 mm in males or> 38 mm in females, namely P. angka, P. baolongensis, P. binchuanensis, P. binlingensis, P. brachykolos, P. caobangensis, P. caudoprocta, P. daweimontis, P. fansipanensis, P. hoanglienensis, P. insularis, P. jiangi, P. jingdongensis, P. jinggangensis, P. leishanensis, P. liboensis, P. lini, P. mirabilis, P. minor, P. nankunensis, P. obesa, P. omeimontis, P. palpebralespinosa, P. sangzhiensis, P. shuichengensis, P. spinata, P. tuberogranulatus, P. wugongensis, P. wuliangshanensis, P. wushanensis, P. xiangnanensis, and P. yangmingensis. Panophrys daiyunensis sp. nov. can be distinguished from the remaining nine congeners by the following characteristics: SVL 27.6–28.7 mm in males and 33.7–35.6 mm in females (vs SVL 30.2–39.3 mm in males in P. dongguanensis; vs SVL 30.4–33.9 mm in males in P. jiulianensis; vs SVL 30.1–30.8 mm in males and 36.3 mm in female in P. mufumontana; vs SVL 30.5–37.3 mm in males in P. nanlingensis; vs SVL 30.3–33.7 mm in males and 37.6 mm in female in P. shunhuangensis); horn-like tubercle at upper eyelid small (vs large in P. acuta); vomerine teeth present (vs absent in P. acuta, P. cheni, P. mufumontana, and P. shunhuangensis); tongue not notched (vs notched in P. cheni, P. jiulianensis, P. nanlingensis, and P. rubrimera); heels overlapping or meeting (vs not meeting in P. acuta and P. dongguanensis); narrow lateral fringes present on toes (vs wide in P. cheni; vs absent in P. dongguanensis, P. jiulianensis, and P. shunhuangensis); rudimentary web present between toes (vs absent in P. rubrimera). Description of holotype. SYS a001733, adult male. Habitus small, SVL 28.7 mm; head width shorter than head length, HDW/HDL 0.97; snout rounded in dorsal view, projecting, sloping posteriorly to mouth in profile, protruding well beyond margin of lower jaw; dorsal surface of head flat; eye small, ED/HDL 0.39; nostril obliquely ovoid; pupil vertical; canthus rostralis well developed, curved above nostril; loreal region sloping; internasal distance larger than interorbital distance; tympanum distinct, small, upper margin in contact with supratympanic fold; choanae large ovoid, situated at base of maxilla; vomerine teeth present; margin of tongue not notched. Lower arm length 0.23 of SVL and hand length 0.24 of SVL; relative finger lengths I = II <IV <III; tip of finger rounded, slightly dilated; one subarticular tubercle present at base of each finger; fingers without webs, narrow lateral fringes present on fingers; outer and inner metacarpal tubercles distinct, inner metacarpal tubercle observably enlarged. Shank length 0.46 of SVL and foot 0.63 of SVL; tibio-tarsal articulation reaches posterior margin of eye when hindlimb stretched alongside body; heels overlapping when hindlimbs held at right angles to body; relative toe lengths I <II <V <III <IV; tips of toes rounded, slightly dilated; one subarticular tubercle present at base of each toe; rudimentary web and lateral fringes present between toes; tarsal folds absent; inner metatarsal tubercle long, ovoid, and outer metatarsal tubercle absent. Dorsal body’s skin texture rough with densely-distributed granules and scattered raised tubercles; “X” shaped skin ridge on center of dorsum; dorsolateral skin ridges present; a small horn-like tubercle present at edge of upper eyelid; supratympanic fold distinct, curving from posterior corner of eye, posteroventrally to above insertion of arm. Ventral surface of throat smooth; rounded, densely-distributed tubercles present on ventral chest and belly; raised, densely-distributed tubercles on ventral thigh; pectoral gland large, closer to axilla; single large femoral gland on posterior surface of thigh. Coloration of holotype. Dorsal surface yellowish brown; a dark incomplete triangular marking with light edge between eyes; a dark “X” shaped marking with light edge on center of dorsum; dark patches on dorsal upper arms and hindlimbs; dark stripes below eyes and at lateral tip of snout; iris reddish brown. Ventral surface dark brown; three dark longitudinal stripes on the throat, middle one distinctly shorter; red spots on the chest and densely-distributed tiny white spots on belly and ventral thigh; palms and soles purplish brown, tips of digits greyish white, metacarpal and metatarsal tubercles orange red; pectoral glands and femoral glands white. Variation. Measurements of type series are given in Table 4. All specimens were similar in morphology. Females are larger than males. SYS a006000 (Fig. 3E, F) has reddish brown dorsal surface with “)(”-shaped marking and gray ventral surface with unclear marking. Without “X” or “)(”-shaped marking on center of dorsum in SYS a006002. Distribution and ecology. Currently, Panophrys daiyunensis sp. nov. is known from Daiyun Mountain Nature Reserve (1000–1250 m a.s.l.) and Xiamen City (ca 400 m a.s.l.) of southern Fujian. This toad inhabits streams surrounded by moist subtropical secondary evergreen broadleaved forests, and is common from May to June. Males call actively on leaves of bushes or rocks near streams during this period. All females found in June were gravid with oocytes but tadpoles have not been found.Published as part of Lyu, Zhi-Tong, Zeng, Zhao-Chi, Wang, Jian, Liu, Zu-Yao, Huang, Ya-Qiong, Li, Wen-Zhou & Wang, Ying-Yong, 2021, Four new species of Panophrys (Anura, Megophryidae) from eastern China, with discussion on the recognition of Panophrys as a distinct genus, pp. 9-40 in Zootaxa 4927 (1) on pages 21-23, DOI: 10.11646/zootaxa.4927.1.2, http://zenodo.org/record/453384
Hydrolytic cleavage of nerve agent simulants by gold nanozymes
No full textAlthough banned by the Chemical Weapons Convention, organophosphorus nerve agents are still available and have been used in regional wars, terroristic attacks or for other crtaiminal purposes. Their degradation is of primary importance for the severe toxicity of these compounds. Here we report that gold nanoparticles passivated with thiolated molecules bearing 1,3,7-triazacyclononane and 1,3,7,10-tetraazacyclododecane ligands efficiently hydrolyze nerve agents simulants p-nitrophenyl diphenyl phosphate and methylparaoxon as transition metal complexes at 25 °C and pH 8 with half-lives of the order of a few minutes. Mechanistically, these catalysts show an enzyme-like behavior, hence they constitute an example of nanozymes. The catalytic site appears to involve a single metal ion and its recognition of the substrates is driven mostly by hydrophobic interactions. The ease of preparation and the mild conditions at which they operate, make these nanozymes appealing catalysts for the detoxification after contamination with organophosphorus nerve agents, particularly those poorly soluble in water
The analysis of reservoir operation rules in the southwestern United States using a hidden Markov-decision tree model
No full textRealistic reservoir operation is an important component in basin hydrological models. However, the operation rules can be complex under various situations and are not well understood yet. The objective of the study is to find out patterns of actual reservoir operation rules in a specific region under different conditions. The results are helpful to understand realistic reservoir operation behaviors. Moreover, the work will contribute to building a reservoir component for hydrological models and provide references for improving reservoir operation decisions in the future.
A hidden Markov-decision tree (HM-DT) model is applied in this study. Hidden Markov Model is used to describe the transition between operation states while each state corresponds to a decision tree model to determine daily reservoir releases. This study collected the historical records of 66 reservoirs in the southwestern United States and 8 reservoirs in the northern United States and identified their regional representative operation modules.
A comparison between the representative operation modules was conducted to show the spatial variability of reservoir operations. Further, by analyzing the historical operation patterns of several reservoirs, the transitions between operation rules in different time periods were explored, including periodicity and special responses to floods. The operation rules adopted by reservoirs with different operation functions are also analyzed and compared. A robustness analysis was performed to confirm the robustness of the HM-DT model outputs. Finally, several attempts have been made to link the HM-DT model with Soil and Water Assessment Tool (SWAT) and future work is proposed.Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-05-01The student, Lingqi Lyu, accepted the attached license on 2021-04-24 at 09:10.The student, Lingqi Lyu, submitted this Thesis for approval on 2021-04-24 at 09:21.This Thesis was approved for publication on 2021-04-27 at 16:26.DSpace SAF Submission Ingestion Package generated from Vireo submission #16543 on 2021-09-16 at 17:05:11Made available in DSpace on 2021-09-17T02:34:47Z (GMT). No. of bitstreams: 2
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