17,641 research outputs found
Hydrologic modeling by means of a hybrid downscaling approach: an application to the Sai Gon-Dong Nai Rivers Basin
No full textThe spatial and temporal availability and reliability of hydrological data are substantial contribution to the accuracy of watershed modeling; unfortunately, such data requirements are challenging and perhaps impossible in many regions of the world. In this study, hydrological conditions are simulated using the hydrologic model-WEHY, whose data input are obtained from a hybrid downscaling technique to provide reliable and high temporal and spatial resolution hydrological data. The hybrid downscaling technique is coupled a hydroclimate and a machine learning models; wherein the global atmospheric reanalysis data, including ERA-Interim, ERA-20C, and CFSR are used for initial and boundary conditions of dynamical downscaling utilizing the Weather Research and Forecasting model (WRF). The machine learning model (ANN) then follows to further downscale the WRF outputs to a finer resolution over the studied watershed. An application of the combination of mentioned techniques is applied to the third-largest river basin in Vietnam, the Sai Gon-Dong Nai Rivers Basin. The validation of hybrid model is in the 'satisfactory' range. After the estimation of geomorphology and land cover within the watershed, WEHY's calibration and validation are performed based on observed rainfall data. The simulation results matched well with flow observation data with respect to magnitude for both the rising and recession time segments. In comparison among the three selected reanalysis data sets, the best calibration and validation results were obtained from the CFSR data set. These results are closer to the observation data than those using only the dynamic downscaling technique in combination with the WEHY model.N
THE ROLE OF SURFACE- AND DEEP-LEVEL ATTRIBUTES IN GLOBAL VIRTUAL TEAMS: A LONGITUDINAL ANALYSIS
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Atmospheric CH4 measurement near a landfill using an ICL-based QEPAS sensor with V-T relaxation self-calibration
No full textA quartz-enhanced photoacoustic spectroscopy methane (CH4) sensor with vibrational to translational (V-T) relaxation self-calibration was realized and tested for atmospheric CH4 detection near a landfill. To normalize the influence of H2O vapor on the CH4 energy relaxation rate, CH4 and H2O concentrations were detected simultaneously by means of a frequency division multiplexing technique, in which a custom quartz tuning fork was operated in the fundamental and first overtone combined vibration mode. A continuous wave, thermoelectrically cooled distributed feedback interband cascade laser emitting at 3.3 μm and a near-infrared DFB laser emitting at 1.37 μm were used as the excitation source for CH4 and H2O detection, respectively. A theoretical model of V-T relaxation and self-calibration method were developed to allow this CH4 sensor to have a simple setup and a small sensor size. Continuous field measurements were carried out near the largest sanitary landfill in Shanxi province, China, to demonstrate the stability and ruggedness of the realized CH4 sensor
Improving Routing Efficiency for Network-on-Chip through Contention-Aware Input Selection
No full textThe performance of Network-on-Chip (NoC) largely depends on the underlying routing techniques, which have two constituencies: output selection and input selection. Previous research on routing techniques for NoC has focused on the improvement of output selection. This paper investigates the impact of input selection, and presents a novel contention-aware input selection (CAIS) technique for NoC that improves the routing efficiency. When there are contentions of multiple input channels competing for the same output channel, CAIS decides which input channel obtains the access depending on the contention level of the upstream switches, which in turn removes possible network congestion. Simulation results with different synthetic and real-life traffic patterns show that, when combined with either deterministic or adaptive output selection, CAIS achieves significant better performance than the traditional first-come-first-served (FCFS) input selection, with low hardware overhead (<3%)
Decapauropus bifurcodicoccus Qian & Dong, sp. nov.
No full textDecapauropus bifurcodicoccus Qian & Dong sp. nov. (Figure 2) Type material. Holotype. ad. 9 (female), Laoshan Mountain, Jiangsu, 13 October 2010, leg. Qian et al. Paratypes. ad. 9 (female), Laoshan Mountain, Jiangsu, 24 May 2011, leg. Qian et al. Diagnosis. The new species may be close to two species previously described from North America and Australia: Decapauropus parkeri Scheller, 2005 from Great Smoky Mountains National Park, USA and Decapauropus saltuarius Scheller, 2009 from Bruny Island, Mount Mangana, Australia. There are similarities especially in the structure of the pygidium, but the new species is distinguished from both these species by the following characters: the length of two branches (length of t is longer than s in D. bifurcodicoccus; t and s of the same length in D. parkeri and D. saltuarius); the shape of setae on pygidium (b 1 and b 2 is glabrous in D. bifurcodicoccus; b 1 and b 2 with striate in D. parkeri and D. saltuatius); and the shape of the anal plate (V–shaped posterior incision in D. bifurcodicoccus is deeper than that in the other two species; appendages of the anal plate in D. bifurcodicoccus is glabrous, the appendages striate in D. parkeri and D. saltuarius; appendage length in D. bifurcodicoccus is shorter than for others). Etymology. From the Latin bifurc - = double forks and dicoccus = two corns (referring to the shape of the anal plate, with two appendages). Description. Length. 1.2 (– 1.9) mm Head. Tergal setae of short to medium length, subcylindrical, striate, blunt. Relative lengths of setae, 1 st row: a 1 =(9 –) 10, a 2 = 7.7 (– 9); 2 nd row: a 1 = 7.1 –(8), a 2 = 15.4 (– 17), a 3 = 14.6 (– 16.5); 3 rd row: a 1 = 13.8 (– 14), a 2 =(13 –) 14.6; 4 th row: a 1 =(8.7 –) 10.8, a 2 =?(– 17.5), a 3 =(15 –)?, a 4 = 16.9 (– 17.8); The ratio a 1 / a 1 – a 1 in 1 st row 0.81 (– 0.88), 2 nd row 0.36 (– 0.5), 3 rd row (0.75 –) 0.9 and 4 th row 1.2 (– 1.3). Temporal organs oval in tergal view, their length 2.3 times as long as their shortest distance apart. Head cuticle glabrous. Antennae. Segment 4 with four cylindrical setae; Relative lengths of setae: p = 100, p' = 76.7 (– 81), p'' =(34.9 –) 37, r =(28 –) 30; Tergal seta p 1.3 (1.2) times as long as tergal branch t. The latter fusiform, 2.7 (2.8) times as long as its greatest diameter and 0.96 of length of sternal branch s; that branch 1.8 (1.9) times as long as its greatest diameter. Seta q cylindrical, striate, somewhat tapering, 0.93 of length of s. Relative lengths of flagella (basal segments included) and basal segments: F 1 = 100, bs 1 = 8 (– 9); F 2 = 61 (– 63), bs 2 = 8 (– 10); F 3 =(84 –) 86, bs 3 =(7 –) 9. The F 2 thinnest; F 1 3.3 times as long as t, F 2 and F 3 2.0 (2.1) and 2.9 (2.8) times as long as s, respectively. Distal calyces spherical; distal part of flagella axes fusiform. Globulus g 1.1 (1.2) times as long as wide; about nine bracts, capsule subspherical; width of g (0.7) 0.8 of the greatest diameter of t. Antennae almost glabrous. Trunk. Setae of collum segment clavate, striate, rudiments of secondary branches probably absent. Sublateral setae 1.6 times as long as submedian ones; sternite process triangular, blunt; appendages narrowing distally and with flat caps; process and basal segment of appendages with distinct, almost erect, short pubescence. Setae on tergites thin, cylindrical; 4 + 4 setae on tergite I, 6 + 6 on II–IV, 6 + 4 on V, 4 + 2 on VI. Submedian posterior setae on VI 0.7 (– 0.8) of their distance apart and about as long as pygidial setae a 1. Tergites glabrous. Relative lengths of bothriotricha: T 1 = 100, T 2 = 104 (– 111), T 3 = 108 (– 115), T 4 =(120 –) 129, T 5 = 166 (– 170), all with simple straight axes; all with pubescence thin, erect. Legs. Setae on coxa and trochanter of leg 9 furcated with subcylindrical blunt branches. Tarsus of leg 9 short, somewhat tapering, 2.8 times as long as its greatest diameter. Setae subsimilar, thin, cylindrical, striate; their length 0.2 of the length of tarsus. Cuticle of tarsus with very delicate pubescence. Pygidium. Tergum. Posterior margin between st evenly rounded. Relative lengths of setae: a 1 = a 2 = 100, a 3 = 181 (– 185), st = 44 (– 47). All setae but st point, with short oblique pubescence; st blunt, subcylindrical, glabrous; distance a 1 –a 1 as long as a 1; distance a 1 – a 2 (1.5 –) 1.7 times as long as a 2 – a 3; distance st – st (4.8)– 5.7 times as long as st and 2.1 length of distance a 1 – a 1. Sternum. Posterior margin with shallow indentation between b 1. Relative lengths of setae (a 1 = 100): b 1 = 413 (– 419), b 2 = 75 (– 81). All setae subcylindrical, blunt. Distance b 1 – b 1 0.72 (– 0.74) of length of b 1; distance b 1 – b 2 0.35 (– 0.42) of length of b 2. Anal plate. 2.1 times as long as broad with a V–shaped posterior incision separating two long, subcylindrical posterolateral lobes; lateral margin with indentation, two short, blunt, elliptical, appendages stick out from distal part of lobes, 0.11 of length of the plate; plate and appendages glabrous.Published as part of Qian, Changyuan, Dong, Yan, Guo, Hua, Chu, Kelin & Sun, Hongying, 2013, Pauropods (Myriapoda: Pauropoda) from eastern China, descriptions of three new species and revision of Pauropus bifurcus Zhang & Chen, 1988, pp. 116-126 in Zootaxa 3608 (2) on pages 119-121, DOI: 10.11646/zootaxa.3608.2.2, http://zenodo.org/record/22267
Building discrete maps with memristor and multiple nonlinear terms
No full textDesigning new discrete maps attracts numerous studies in the literature. This work introduces a way to build discrete maps by combining a memristor and multiple nonlinear terms. Different approaches for building memristive maps have been reviewed. We present a general model for constructing discrete maps with a memristor and two nonlinear terms. New memristive maps are reported. In addition, we have studied the MNFM1 map in more details to discovery its specific features. It is possible to extend our approach to obtain a memristive map with multiple nonlinear terms. Memristive maps can be used in civil aviation applications
Decapauropus duomamillatus Qian & Dong, sp. nov.
No full textDecapauropus duomamillatus Qian & Dong sp. nov. (Figure 3) Type material. Holotype. ad. 9 (female), Qixia Mountain, Jiangsu, 23 September 2010, leg. Qian et al. Paratypes. ad. 9 (female), Qiaxia Mountain, Jiangsu, 15 October 2011, leg. Qian et al. Diagnosis. The shape of the antennae and the anal plate indicate that the new species is close to two previously described species from North America and Australia: Decapauropus alaskae Scheller 1986 from Chena Ridge, Fairbanks, Alaska, and Decapauropus terrestris Scheller 2009 from Savage River Pipeline Road, Australia. D. duomamillatus differs from these two species by the following characters: the shape of the setae on the pygidium (all setae but b 2 are subcylindrical, blunt, and glabrous in D. duomamillatus; all setae in D. alaskae are cylindrical, thin, distally tapering, and with very shortly pubescent; all setae in D. terrestris are subcylindrical, thin, annulate, blunt); the shape of st (st blunt, short, subcylindrical, glabrous in D. duomamillatus; st long, inwards, annulate in D. alaskae; st pointing inwards, almost glabrous in D. terrestris); and the shape of the anal plate (U–shaped incision, plate glabrous and with two very short, subglobular appendages in D. duomamillant. V–shaped incision, plate with two fusiform striate appendages projecting backwards in D. alaskae; V–shaped incision, plate glabrous and with two very short, cylindrical, blunt, shortly pubescent appendages in D. terrestris). Etymology. From the Latin duo - = two and mamillatus = papillary (referring to the anal plate with two appendages). Description. Length. 0.52 (– 0.81) mm Head. Tergal setae of short to medium length, densely annulate, thin, blunt. Relative lengths of setae, 1 st row: a 1 = 10, a 2 = 10 (– 12); 2 nd row: a 1 = 11.4 (– 13), a 2 = 10 (– 12), a 3 = 13 (– 15); 3 rd row: a 1 =(13 –) 15, a 2 = 10 (– 12); 4 th row: a 1 = 11 (– 13), a 2 = 14 (– 17), a 3 = 14 (–?), a 4 = 11 (– 15); The ratio a 1 / a 1 – a 1 in 1 st row (1.5 –) 1.8, 2 nd row 0.7 (– 0.8), 3 rd row (3.5 –) 4.5 and 4 th row (1.1 –) 1.3. Temporal organs oval in tergal view, their length 1.35 times as long as their shortest distance apart. Head cuticle glabrous. Antennae. Segment 4 with four cylindrical setae; relative lengths of setae: p = 100, p' = 45 (– 46), p'' =(58 –) 60, r =(36 –) 45; Tergal seta p (0.5) 0.64 of length of tergal branch t. The latter fusiform, 4.4 (3.9) times as long as its greatest diameter and 1.6 (1.8) times as long as sternal branch s; that branch 2.5 (2.8) times as long as its greatest diameter. Seta q cylindrical, annulate, blunt, 1.2 times as long as s. Relative lengths of flagella (basal segments included) and basal segments: F 1 = 100, bs 1 = 10; F 2 = 88 (– 92), bs 2 = 9; F 3 = 80 (– 84), bs 3 = 8. F 1 1.4 times as long as t, F 2 and F 3 1.8 (– 2.1) and (1.4 –) 1.6 times as long as s, respectively. Distal calyces conical; distal part of flagella axes fusiform. Globulus g with flattened capsule. 1.0(– 1.1) times as long as wide; about nine bracts, capsule subspherical; width of g 1.0(– 1.1) times as long as greatest diameter of t. Antennae almost glabrous. Trunk. Setae of collum segment somewhat clavate, annulate, blunt, furcated but with rudimentary glabrous blunt secondary branches. 4 + 4 setae on tergite I, 6 + 6 on II–IV, 6 + 4 on V, 4 + 2 on VI. Relative lengths of bothriotricha: T 1 = 100, T 2 = 85 (– 90), T 3 = 108 (– 120), T 4 =(120 –) 129, T 5 = 166 (– 170), all with simple straight axes; all with pubescence thin erect. Legs. Setae on coxa and trochanter of leg 9 similar, furcated with subcylindrical blunt branches. Tarsus of leg 9 short, somewhat tapering, 2.8 times as long as its greatest diameter. Setae subsimilar, thin, cylindrical, striate; their length 0.2 of length of tarsus. Cuticle of tarsus glabrous. Pygidium. Tergum. Relative lengths of setae: a 1 = 100, a 2 =(164 –) 176, a 3 =(389 –) 400, st =(45 –) 47. All setae clavate, blunt, glabrous; distance a 1 –a 1 (2.2 –) 2.4 times as long as a 1; distance a 1 – a 2 3.6 (– 3.8) times as long as a 2 – a 3; distance st – st 2.5 (– 2.7) times as long as st and 0.5 (– 0.7) of length of distance a 1 – a 1. Sternum. Posterior margin with shallow indentation between b 1. Relative lengths of setae (a 1 = 100): b 1 =(570 –) 576, b 2 =(210 –) 212. b 1 subcylindrical, blunt. b 2 tapering bent inwards,. Distance b 1 – b 1 0.74 (– 0.77) of length of b 1; distance b 1 – b 2 1.0(– 1.2) times as long as b 2. Anal plate. Broadest anteriorly, glabrous; 1.8 times as long as broad, with a U–shaped posterior incision separating two short, subcylindrical posterolateral lobes; two short, globular, parallel appendages protruding backwards from distal part of lobes, 0.11 of length of the plate; plate and appendages glabrous.Published as part of Qian, Changyuan, Dong, Yan, Guo, Hua, Chu, Kelin & Sun, Hongying, 2013, Pauropods (Myriapoda: Pauropoda) from eastern China, descriptions of three new species and revision of Pauropus bifurcus Zhang & Chen, 1988, pp. 116-126 in Zootaxa 3608 (2) on pages 121-123, DOI: 10.11646/zootaxa.3608.2.2, http://zenodo.org/record/22267
Draconibacterium mangrovi Hu & Guo & Lai & Dong & Huang 2020, SP. NOV.
No full textDESCRIPTION OF DRACONIBACTERIUM MANGROVI SP. NOV. Draconibacterium mangrovi (man.gro'vi. N.L. gen. n. mangrovi of a mangrove). Colonies on MB agar plates are light yellow, small and round. Cells are Gram-stain-negative, facultatively anaerobic, slightly curved and long rod-shaped, 5–6.5 µm long and 0.6 µm wide, with no flagellum. Catalase activity is weak positive and oxidase activity is positive. Growth is observed at 15–40 °C (optimum, 35 °C), NaCl tolerance of 0–5% (w/v; optimum, 2%) and pH 5.0–9.0 (optimum, pH 7.0). It has no ability to degrade soluble starch, skimmed milk or carboxymethyl cellulose. Grows slowly on nitrogenfree medium. This species shows positive results for alkaline phosphatase, esterase (C4), esterase lipase (C8), leucine arylamidase, valine arylamidase, cystine arylamidase, trypsin, α -chymotrypsin, acid phosphatase, naphthol-AS- BI-phosphohydrolase, α -galactosidase, β -galactosidase, α -glucosidase, β -glucosidase, N -acetyl- β -glucosaminidase and β -fucosidase; weak positive for lipase (C14), β -glucuronidase and α -mannosidase. Reduction of nitrate to nitrite is positive. Production of indole is weak positive. Hydrolysis of aesculin is positive. Positive for 4-nitropheny l- β -D-galactopyranoside. Hydrolysis of gelatin is negative. Fermentation of amygdalin is positive and fermentation of rhamnose, sucrose and melibiose is weakly positive. The predominant menaquinone is MK-7. The major fatty acids are (>10%) iso-C 15:0, anteiso-C 15:0 and C 17:1 ω 6 c. The polar lipids include phosphatidylethanolamine, a phospholipid and several unidentified lipids. The draft genome size is 5.9 Mb with genomic G+C content of 40.8 mol%. The type strain, GM2-18 T (=MCCC 1K04382 T =KCTC 72879 T), was isolated from mangrove sediment sampled at Luoyang River estuary in Quanzhou bay, Fujian, PR China. The GenBank/EMBL/DDBJ accession number of the 16S rRNA gene sequence of strain GM2-18 T is MN908333. The draft genome sequence has been deposited at GenBank under the accession number JAAAGB000000000.Published as part of Hu, Yuzhong, Guo, Yu, Lai, Qiliang, Dong, Le & Huang, Zhaobin, 2020, DraCOnibaCTerium mangrOVi sp. nov., isolated from mangrove sediment, pp. 4816-4821 in International Journal of Systematic and Evolutionary Microbiology 70 (8) on pages 4819-4820, DOI: 10.1099/ijsem.0.004354, http://zenodo.org/record/622405
A review on analysis and synthesis of nonlinear stochastic systems with randomly occurring incomplete information
No full textCopyright q 2012 Hongli Dong et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.In the context of systems and control, incomplete information refers to a dynamical system in which knowledge about the system states is limited due to the difficulties in modeling complexity in a quantitative way. The well-known types of incomplete information include parameter uncertainties and norm-bounded nonlinearities. Recently, in response to the development of network technologies, the phenomenon of randomly occurring incomplete information has become more and more prevalent. Such a phenomenon typically appears in a networked environment. Examples include, but are not limited to, randomly occurring uncertainties, randomly occurring nonlinearities, randomly occurring saturation, randomly missing measurements and randomly occurring quantization. Randomly occurring incomplete information, if not properly handled, would seriously deteriorate the performance of a control system. In this paper, we aim to survey some recent advances on the analysis and synthesis problems for nonlinear stochastic systems with randomly occurring incomplete information. The developments of the filtering, control and fault detection problems are systematically reviewed. Latest results on analysis and synthesis of nonlinear stochastic systems are discussed in great detail. In addition, various distributed filtering technologies over sensor networks are highlighted. Finally, some concluding remarks are given and some possible future research directions are pointed out. © 2012 Hongli Dong et al.This work was supported in part by the National Natural Science Foundation of China under Grants 61273156, 61134009, 61273201, 61021002, and 61004067, the Engineering and Physical Sciences Research Council (EPSRC) of the UK under Grant GR/S27658/01, the Royal Society of the UK, the National Science Foundation of the USA under Grant No. HRD-1137732, and the Alexander von Humboldt Foundation of German
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