58,224 research outputs found
Bai pin pu wang luo zhong de jing ji xue
No full textLuo, Yuan.Thesis Ph.D. Chinese University of Hong Kong 2015.Includes bibliographical references (leaves 273-283).Abstracts also in Chinese.Title from PDF title page (viewed on 01, November, 2016).Luo, Yuan
Structure characterization and tribological study of magnetron sputtered nanocomposite nc-TiAlV(N, C)/a-C coatings
No full textGrown by reactive unbalanced magnetron sputtering in a mixed N2 and CH4 gaseous medium, heterogeneous nanocomposite coatings in the Ti-Al-V-N-C system show extraordinarily excellent tribological performance of coated machining tools. Using analytical high resolution TEM, EELS, FEG-SEM, XRD, and Raman spectroscopy, this paper reports detailed structural and chemical characterization of the coatings grown at various CH4: N2 ratios. Meanwhile, the mechanical and tribological properties were also measured, including hardness, Young’s modulus, residual stress and the dry-sliding friction and wear at varying environmental humidity. When CH4 gas was introduced in the deposition, the structure of the coatings has been found to experience a change from nano-scale TiAlN-VN multilayer architecture to a complex mixture of columnar grains of nc-TiAlV(N,C)/a-C nanocomposites and inter-column network of sp2-type amorphous carbon. Carbon incorporation and segregation also shows remarkable influence on the columnar growth model by leading to finer grain size. As compared to the carbon-free nitride coating, the nanocomposite coatings showed substantially reduced residual stress owing to the free-carbon precipitation, whereas the coatings maintained comparable hardness to the carbon-free TiAlN/VN. Their tribological properties were found to be strongly dependent on the environment. In humid air at RH > 30%, the coatings showed low friction coefficient less than 0.4 and extremely low wear rate at a scale of ~10-17 m3N-1m-1
Rosa tomurensis L. Luo, C. Yu & Q. X. Zhang
No full textRosa tomurensis L. Luo, C. Yu & Q. X. Zhang (Figures 3, 4, 5) Type: — CHINA. Xinjiang Uygur autonomous region, Akesu Prefecture, Wensu County, Tuomuerfeng Natural Preservation Areas, in river valleys, ca. 1800m, 10 June 2017, L. Luo, C. Yu, Y. J. Sui, F. Yang & S. Zhao 171022 (holotype BJFC00107674!). Diagnosis: — R. tomurensis is different from R. laxa in the following characteristics: prickles are rare, single prickles are larger, and the tip of prickles is not curved significantly; leaf blade apex serrate only, subbase one-third entire; flowers often solitary, and single flowers are larger than R. laxa; receptacles purplish red, occasionally green; pedicels very long, purplish red or green; sepals are purplish red or green; hips are larger than R. laxa, often pendulous, hip apex without short neck; hip pedicels slightly inflated at base; sepals abaxially, receptacle and pedicel glandular or glandless together, the glands in the pedicel sometimes shed at anaphase. (Table 2). Description: —Shrubs, erect, 2.5–3 m tall, basal branching. Branchlets slender, brownish red; branchial spines are rare, scattered, rarely opposite, pale yellow and white, unequal in length, slender, broad at base, apex slightly downward curved. Leaflets 5–9, usually 7, elliptic, obovoid, ovoid or oblong, 0.6–2 × 0.5–1 cm, abaxially sparsely pilose, adaxially smooth; leaf margin simple serrate, often entire subbase one-third. Stipules usually wider, base mostly adnate to petiole, free portion ovate, triangulate, margin glandular spot. Flowers often solitary, sometimes 2–3 in corymbose cymes, (3) 3.5–6.5 (7) cm in diam; pedicel 1.5–3.5 cm, pedicel and calyx tube glabrous or tomentose and sparsely glandular hairs; bracts ovate, margin glandular teeth, abaxially with distinct midrib and lateral veins; sepals long lanceolate, margin entire, apex elongated widened into appendages, abaxially glandular and densely tomentose, adaxially densely pubescent, margin more densely; petals white, sparse pink,or pale pink, at bud stage, petal tips are often pink or pale pink. Hip subglobose or ovoid, red, shiny, 1–2.1cm in diam, 1.5–2 cm long, sepals persistent and spreading; fruit pedicel straight or bent. Distribution and habitat: —This species is produced in the Tuomuerfeng Natural Preservation Areas of Wensu County in Aksu Perfecture, the Pamir Plateau Mountain Area of Kizilsu Kirgiz Autonomous Prefecture, Tajik Autonomous County of Taxkorgan in Kashgar Prefecture and the south slope of Duku Highway, Xinjiang Uygur Autonomous Region. It borns in arid mountains, river valleys and riparian thickets, at elevations between 1700 m and 3000 m. The associated woody plants in this area are R. laxa, R. albertii, Berberis sp., Caragana sp., etc. Phenology: —Flowering from June to July, fruiting from August to October. Etymology: —The specific epithet refers to the distribution where the new species was first discovered. Paratypes: — CHINA. Xinjiang Uygur autonomous region, Akesu Prefecture, Wensu County, Tuomuerfeng Natural Preservation Areas, in river valleys, ca. 1800m, 24 September 2017, L. Luo, C. Yu, Y. J. Sui, F. Yang & S. Zhao 171023 (BJFC00107688!); the same locality, 8 June 2017, L. Luo, C. Yu, Y. J. Sui, F. Yang & S. Zhao 171024 (BJFC00107671!). Conservation status: —Based on currently available data, the species should be assigned to the ‘Data Deficient’ (DD) category of IUCN (2022). There is little human interference in this species’ distribution areas, so these populations are not easy to be destroyed.Published as part of Deng, Tong, Luo, Le, Yu, Chao, Zhang, Qi-Xiang, Liu, Xue-Sen & Deng, Ze-Yi, 2022, Rosa tomurensis, a new species of Rosa (Rosaceae) from China, pp. 169-177 in Phytotaxa 556 (2) on pages 174-175, DOI: 10.11646/phytotaxa.556.2.6, http://zenodo.org/record/696599
FIGURE 5. R. tomurensis L. Luo, C in Rosa tomurensis, a new species of Rosa (Rosaceae) from China
No full textFIGURE 5. R. tomurensis L. Luo, C. Yu & Q. X. Zhang, A. Habit, B–C. Leaf, D. Stipule, E. Prickle, F–H. Flower, I. Pink flower, J–K. Bud, L–N. Hip, O. Whole plant.Published as part of Deng, Tong, Luo, Le, Yu, Chao, Zhang, Qi-Xiang, Liu, Xue-Sen & Deng, Ze-Yi, 2022, Rosa tomurensis, a new species of Rosa (Rosaceae) from China, pp. 169-177 in Phytotaxa 556 (2) on page 173, DOI: 10.11646/phytotaxa.556.2.6, http://zenodo.org/record/696599
Esempio di rappresentazione del sé in Lu Ling 路翎, Luo Dadou de yisheng 罗大斗的一生 (La vita di Luo Dadou)
No full textIn the story Luo Dadou’s life (Luo Dadou de yisheng 罗大斗的一生), Lu Ling 路翎 (1923-1994) gives shape to the deepness of human psyche and stresses the suffering of the Self of his age by giving a brilliant emphasis to human individuality. The author succeeds in doing so by creating an amazing psychological characterization of the main character, both by means of words and by means of grammatical structures. By applying Denton’s categories for the study of the Self in modern Chinese literature, I analysed Lu Ling’s short story from the Freudian and Kleinian psychodynamic perspective, so to demonstrate how Lu Ling enters his characters’ minds and wonderfully recreates the psychological dynamics inside and between them
Simulation and measurement of leaf wetness formation in paddy rice crops
No full textThe study described in this thesis focuses on a quantification of leaf wetness formation in paddy rice crops based on insight in the physical processes of the formation of leaf wetness. For this purpose, experimental research was conducted in a tropical paddy rice field.A shielding (nocturnal net radiative loss) experiment was designed to investigate the dependence of dew formation on nocturnal net radiative loss. A simple method was developed to estimate dew amount and duration using the nightly total net radiative loss. The shielding experiment unexpectedly provided a feasible method for experimentally distinguishing dew from guttation. For a better understanding of the characteristics of the formation of leaf wetness in paddy rice crops, warm water flooding both in the paddy rice field and in a phytotron was conducted to investigate the effects of water temperature on dew formation and guttation. The experimental data indicated an optimum paddy water temperature of 30°C for rice leaf guttation. The effect of water temperature on dew formation depended on the weather condition above the canopy, especially the thermal stratification condition, net radiation and vapour pressure deficit. A simple device, the dewball, was designed to observe dew formation and to determine its threshold value of nocturnal net radiative loss from top leaves. This was shown to be a simple and accurate method for estimating daily dew duration on top leaves. The possibility of using the mean diurnal patterns of weather variables to estimate dew formation was analysed by comparing the dew estimated using a simulation model to the measured results. This helped to understand to what extent the diurnal patterns will give as good an estimate of dew formation as when the observed hourly weather data are used. Based on the observation results on the dewball and the results of the shielding experiment, a simple approach to estimate daily dew duration on top leaves of the paddy rice crops was formulated and its potential applications to plant protection were discussed
Design of split-inductors applied in positive output super lift luo-converters
No full textAs the demand of the modern electronic devices and appliances are getting higher, the role of the converters with higher output and efficiency become wider for different industries. It has been the role of engineers to explore the converter topology to provide higher output voltage in simple design with less cost. There are quite a number of different ways of lifting output voltage in converter topology.The method that the author will be introducing is called “Split- Inductors Method”, where the
output voltage is totally dependent on the number of inductors used in the converter design. The
report will include a detail discussion about design and results of” split-inductors topology”,
applied to “Positive Output Super Lift Luo Converter” using software simulations and hardware
experiments.Bachelor of Engineerin
Lippaa liivis kiinni Ja kulje kultas luo (4/4 C)
No full textLaulun sanat: Lippaa liivis kiinni Ja kulje kultas luo! Kullallas on ikävä, Ja vaatii sinua luo
- …
