20,683 research outputs found
Ljania guangxiensis Ao & Yi & Guo 2021, sp. nov.
No full textLjania guangxiensis sp. nov. (Fig. 3) Type material. Holotype female, Dayaoshan National Nature Reserve, Guangxi Province, P. R. China (23°97′33′′N, 110°13′17′′E, 915 m a.s.l.), water depth 10–15 cm, with many small stones and sands on the bottom, collected by Min Ao, Cai-Yun Li & Hai-Tao Li, 5-IX-2019. Paratype: 0/1/0 (mounted), same data as holotype. Slides No. GX- AT-20190510 (holotype)—GX-AT-20190511 (paratype).Published as part of Ao, Min, Yi, Tian-Ci & Guo, Jian-Jun, 2021, The first record of the water mite genus Ljania Thor, 1898 (Acari, Hydrachnidiae Aturidae) from China, with description of two new species, pp. 391-398 in Zootaxa 4970 (2) on page 395, DOI: 10.11646/zootaxa.4970.2.11, http://zenodo.org/record/476170
Ljania jini Ao & Yi & Guo 2021, sp. nov.
No full textLjania jini sp. nov. (Figs 1–2) Type material. Holotype male, Dayaoshan National Nature Reserve, Guangxi Province, P. R. China (23°58′48′′N, 110°7′6′′E, 950 m a.s.l.), water depth 10–20 cm, with many small stones and sand on the bottom, collected by Min Ao & Hai-Tao Li, 5-IX-2019. Paratype: 0/1/0 (mounted), same data as holotype. Slides No. GX-AT-20190907 (holotype)—GX-AT-20190908 (paratype).Published as part of Ao, Min, Yi, Tian-Ci & Guo, Jian-Jun, 2021, The first record of the water mite genus Ljania Thor, 1898 (Acari, Hydrachnidiae Aturidae) from China, with description of two new species, pp. 391-398 in Zootaxa 4970 (2) on page 392, DOI: 10.11646/zootaxa.4970.2.11, http://zenodo.org/record/476170
A new species of Diachasmimorpha Viereck (Hymenoptera: Braconidae: Opiinae) from China
No full textAo, Guo-Fu, Shi, Shuang, Zheng, Min-Lin, Chen, Shi, Ji, Qing-E (2022): A new species of Diachasmimorpha Viereck (Hymenoptera: Braconidae: Opiinae) from China. Zootaxa 5116 (3): 429-438, DOI: https://doi.org/10.11646/zootaxa.5116.3.
Applicability of Phase-Function Normalization Techniques for Radiation Transfer Computation
No full textThe applicability of recently-developed four phase-function (PF) normalization techniques for modeling radiation transfer in strongly anisotropic scattering media is intensively examined using the discrete-ordinate method. The three simple techniques via normalization of only the forward- and/or backward-scattering directions were shown to reduce normalization complexity whilst retaining diffuse radiation computation accuracy for Henyey-Greenstein (HG) PFs. For Legendre PFs, however, such simple techniques are found to result in unphysical negative PF value at one or few correction direction in some cases. Additionally, negative PF values can occur for these simple techniques for ballistic radiation transfer for both HG and Legendre PF types. If negative-intensity correction is applied, however, radiative heat transfer calculation can still converge regardless of the appearance of negative PF values. The relatively complex Hunter and Guo 2012 technique, in which normalization is realized through a correction matrix covering all discrete directions, is shown to be applicable for diffuse and ballistic radiation for both PF types.Peer reviewed
FIGURE 3 in A new species of Diachasmimorpha Viereck (Hymenoptera: Braconidae: Opiinae) from China
No full textFIGURE 3. Diachasmimorpha anshunensis, sp. nov. (A–G): A. head (frontal view); B. head (dorsal view); C. wings; D. antenna (scapus, pedicellus,1st–3rd and last nine flagellomeres; E. mesosoma (lateral view); F. hind leg (arrow shows the spikes of apical part of hind tibia); G. posterior part of ovipositor and ovipositor sheath.Published as part of Ao, Guo-Fu, Shi, Shuang, Zheng, Min-Lin, Chen, Shi & Ji, Qing-E, 2022, A new species of Diachasmimorpha Viereck (Hymenoptera: Braconidae: Opiinae) from China, pp. 429-438 in Zootaxa 5116 (3) on page 434, DOI: 10.11646/zootaxa.5116.3.7, http://zenodo.org/record/637229
FIGURE 3 in A new species of Diachasmimorpha Viereck (Hymenoptera: Braconidae: Opiinae) from China
No full textFIGURE 3. Diachasmimorpha anshunensis, sp. nov. (A–G): A. head (frontal view); B. head (dorsal view); C. wings; D. antenna (scapus, pedicellus,1st–3rd and last nine flagellomeres; E. mesosoma (lateral view); F. hind leg (arrow shows the spikes of apical part of hind tibia); G. posterior part of ovipositor and ovipositor sheath.Published as part of Ao, Guo-Fu, Shi, Shuang, Zheng, Min-Lin, Chen, Shi & Ji, Qing-E, 2022, A new species of Diachasmimorpha Viereck (Hymenoptera: Braconidae: Opiinae) from China, pp. 429-438 in Zootaxa 5116 (3) on page 434, DOI: 10.11646/zootaxa.5116.3.7, http://zenodo.org/record/637229
The Style of Guo Pu's "Jiang fu (Rhapsody of the Long River)"
No full textJiang fu (Rhapsody of the Long River), writtten by Guo Pu who lived from the end of the West Jin period to the beginning of the East Jin period, not only imitates the style of Han fu (rhapsodies written in the Han dynasty) for example by marshalling onomatopoeic words and many names of things in four syllables, but also emphasizes it. Such a style was made possible by the writer's extensive knowledge of Chinese characters and natural history. However, the conscious imitation of Han fu is too artificial, almost making the reader feel pitiful. "Jiang fu" does not revive such powerful atmospheres as those in Mei Cheng's fu and Si-ma Xiang-ru's fu. It is the last long fu of rivers and seas that imitates the Han fu style before the Tang dynasty. In spite of its imitative style, we can find some new attempts in it, such as the appearance of many strange animate things, including monsters from "Shan-hai Jing (the book about mountains and seas)", vivid descriptions of fish, water fowls, and plants, as well as the representation of a fairly new world found in the new scriptures of Taoism in those days. These strange creatures and scenes had never been described in many previous rhapsodies of rivers and seas. Gazing at them must have shaken the author's thoughts, or perhaps he was so free from conservative thought that he could gaze at them. At any rate, he depicted a more fantastic scene in the last part of "Jiang fu". The author describes a boat pulling out at the risk of the rower's life, as fast as the rosy morning haze spreads through the sky, running away to a world where there are no signs of imperial domination, to complete freedom. The rower at last acquires a life as a hermit, in this life. After his river fishing, he goes home at night, beating the side of his boat, singing a song, quite satisfied and proud of himself, taking nature for a friend, and able to enter a peaceful eternal sleep. "Jiang fu" describes a man turning his back upon the core and looking towards the periphery with great joy, something that many previous rhapsodies of rivers and seas had never described. Furthermore, he is depicted as running away at full speed, full of a sort of vigour. After "Jiang fu", the descriptions of hermit's lives in the literature of the Six dynasties are almost too quiet and refined, except for Tao Yuan-ming's text. In the sense that it describes the hermit's life just before being taken into the Six dynasties' aesthetics, "Jiang fu" can be said to be a monumental text
Practical application of on-line partial discharge monitoring technique on 500kV shunt reactor
No full textConsidering the damage mechanism of oil-impregnated paper insulation in power transformers, shunt reactors and other high voltage electrical apparatus caused by partial discharge, a concept of “destructive partial discharge” is introduced in this paper. The intensity of this discharge is regarded as several thousands pico-coulomb (pC) and may cause the insulation a fatal damage. An oil-paper insulation is usually able to withstand this type of partial discharge for a period of time prior to failure. This provides engineers a time window to detect it. This paper describes an on-line partial discharge monitoring system for 500kV shunt reactors. The commission results from 3 single-phase shunt reactors either connected or disconnected to the grid showed that the on-line partial discharge detecting system has a high noise immunising ability. Two years later after the installation, a pre-warning signal was received from one shunt reactor indicating the existence of an intermittent discharge. The acoustic emission system located its position at the low end of the high voltage bushing in the oil. Dissolved gasses analysis (DGA) in the oil suggested the presence of partial discharge, as acetylene (C2H2) was as high as 20ppm. PD activity was further confirmed by a physical examination on the reactor
Online Iterative Adaptive Dynamic Programming Approach for Solving the Zero-Sum Game for Nonlinear Continuous-Time Systems with Partially Unknown Dynamics
No full textThe current study presents an online iterative adaptive dynamic programming approach to resolve the zero-sum game (ZSG) for nonlinear continuous-time (CT) systems containing a partially unknown dynamic. The Hamilton-Jacobian-Issacs (HJI) equation is solved along the state trajectory according to the value function approximation and the policy improvement online. Relaxed dynamic programming is utilized to ensure the algorithm’s convergence. Model and costate networks were established to conduct the method. Computational simulations are performed to present the efficiency of the algorithm.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Control & Simulatio
Gyrotron FU CW VII for 300 MHz and 600 MHz DNP-NMR spectroscopy
No full textGyrotron FU CW VII, one of the FU CW Series Gyrotrons, has been designed, constructed and completed operational tests successfully in the Research Center for Development of Far Infrared Region, University of Fukui (FIR FU). The gyrotron operates at around 200 GHz for the fundamental cyclotron resonances and at around 400 GHz for the second harmonics. These radiation frequencies will be applied to 300 MHz and 600 MHz DNP enhanced NMR spectroscopy.othe
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