219,000 research outputs found
Scirpophaga adunctella Chen
No full textScirpophaga adunctella Chen, Song & Wu, 2006 (Figs 38, 45, 53) Scirpophaga adunctella Chen, Song & Wu, 2006. Zootaxa, 1236: 15. Type locality: China, Yunnan. Description. Wing span ♀ 30–38 mm. Female white, anal tuft pale ochreous; others same to male. Both male and female sometimes have a dark fuscous spot present at the lower angle of cell on forewing. Female genitalia. Anal papillae broad, covered with long setae; apophyses anterioris and posterioris well developed and with the same length; ostium bursae broad and long, strongly wrinkled, sclerotized towards ductus bursae, different with other species; ductus bursae membranous; corpus bursae round, lined with dense spines. Material examined. IZCAS: Holotype ♂, Yunnan, Wanding, 820 m, 29 May 1979. Others. Xizang, Mêdog, 1♂, 1 080 m, 23 August 2006, Fu-Qiang Chen; Xizang, Mêdog, Ma’niweng, 1♀, 930 m, 25 August 1974, Fu-Sheng Huang; Xizang, Mêdog, Ma’niweng, 895 m, 1♀, 14 August 2006, Fu-Qiang Chen; Xizang, Mêdog, Hanmi, 2 120 m, 1♀, 10 August 2006, Fu-Qiang Chen; Xizang, Mêdog, Didong, 840 m, 3♀, 16 August 2006, Fu-Qiang Chen. Distribution. China (Yunnan, Xizang). Remarks. The female of this species is firstly reported here. Chen et al. (2006) reported the species according to a single male specimen. At that time, we could not match the right female with the male, although some possible materials were checked. Later, more materials of the species were gotten from Xizang. The materials from Xizang sometimes have a dark fuscous spot present at the lower angle of cell on forewing, which is common in excerptalis group.Published as part of Chen, Fu-Qiang & Wu, Chun-Sheng, 2014, Taxonomic review of the subfamily Schoenobiinae (Lepidoptera: Pyraloidea: Crambidae) from China, pp. 163-208 in Zoological Systematics 39 (2) on page 175, DOI: 10.11865/zs20140201, http://zenodo.org/record/461732
Fanyu Chen shi Dongshu cong shu : chu han 4 zhong fu 1 zhong /
No full textThe first 4 works have special title pages, engraved 1848-84?[1-2] Han ru tong yi : 7 juan -- [3-4] Sheng lü tong kao : 10 juan -- [5-7] Qie yun kao : 6 juan wai pian 3 juan -- [8-9] Han shu di li zhi shui dao tu shuo : 7 juan fu Kao zheng Deqing Hu shi Yugong tu Chen Zongyi zhuan.No more published?Mode of access: Internet
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
Chen (Da-sheng) Kalus (Ludwig) Corpus d'inscriptions arabes et persanes en Chine, 1 - Province de Fu-jian (Quan-zhou, Fu-zhou, Xia-men)
No full textAubin Françoise. Chen (Da-sheng) Kalus (Ludwig) Corpus d'inscriptions arabes et persanes en Chine, 1 - Province de Fu-jian (Quan-zhou, Fu-zhou, Xia-men). In: Archives de sciences sociales des religions, n°80, 1992. pp. 251-252
Patissa tenuousa Chen
No full textPatissa tenuousa Chen, Song & Wu, 2007 (Figs 80, 91, 105) Patissa tenuousa Chen, Song & Wu, 2007. Oriental Insects, 41: 269. Type locality: China, Sichuan. Description. Length of labial palpi about 2 times the diameter of compound eyes. Forewing white, with fuscous fasciae, thinner than other species. In male genitalia, valva with two spine-like harpes present, one at middle of costa, another at distal half of valva. Distribution. China (Sichuan).Published as part of Chen, Fu-Qiang & Wu, Chun-Sheng, 2014, Taxonomic review of the subfamily Schoenobiinae (Lepidoptera: Pyraloidea: Crambidae) from China, pp. 163-208 in Zoological Systematics 39 (2) on page 192, DOI: 10.11865/zs20140201, http://zenodo.org/record/461732
Archischoenobius nanlingensis Chen
No full textArchischoenobius nanlingensis Chen, Song & Wu, 2007 (Figs 100, 110, 119) Archischoenobius nanlingensis Chen, Song & Wu, 2007. Oriental Insects, 41: 261. Type-locality: China, Guangdong. Description. Hindwing greyish white at posterior portion. In male genitalia, juxta constrict on both sides, apex bifurcated, with membranous plate; cornutus curved. Distribution. China (Guangdong).Published as part of Chen, Fu-Qiang & Wu, Chun-Sheng, 2014, Taxonomic review of the subfamily Schoenobiinae (Lepidoptera: Pyraloidea: Crambidae) from China, pp. 163-208 in Zoological Systematics 39 (2) on page 198, DOI: 10.11865/zs20140201, http://zenodo.org/record/461732
Archischoenobius minumus Chen
No full textArchischoenobius minumus Chen, Song & Wu, 2007 (Figs 101, 111) Archischoenobius minumus Chen, Song et Wu, 2007. Oriental Insects, 41: 262. Type-locality: China, Guangxi. Description. Hindwing suffused with black scales at posterior portion. In male genitalia, uncus with a sharp thorn at apex; juxta plate-like, constricted from base to apex, apex shortly bifurcated, with small membranous plate; cornutus curved. Distribution. China (Guangxi).Published as part of Chen, Fu-Qiang & Wu, Chun-Sheng, 2014, Taxonomic review of the subfamily Schoenobiinae (Lepidoptera: Pyraloidea: Crambidae) from China, pp. 163-208 in Zoological Systematics 39 (2) on page 198, DOI: 10.11865/zs20140201, http://zenodo.org/record/461732
Space charge measurements in polymer insulated power cables using flat ground electrode PEA system
No full textThis paper describes the data processing methods used to accurately determine the space charge and electric stress distributions in dc power cables using the Pulsed Electro-Acoustic (PEA) system. Due to the coaxial geometry and the thick walled insulation of high voltage cables, factors such as divergence, attenuation and dispersion of the propagated acoustic pressure wave in the PEA can strongly influence the resultant measurements. The above factors are taken into account ensuring accurate measurements to be made. Most importantly, a method is presented to determine the electric stress profile across the insulation due to both the divergent applied field and that as a consequence of trapped charge in the bulk of the insulating material. Results of space charge measurements and the corresponding derived electric stress distributions in XLPE dc cables are presented
Influence of ac ageing on space charge dynamics in LDPE
No full textPolymeric materials have been widely used as insulation in power industry due to their excellent electrical properties. However, these properties deteriorate in time irreversibly when the material is subjected to electric stress. Although space charge is believed to play an important role in ac ageing, exact mechanisms are poorly understood due to very limited experimental data. In the present work efforts have been made to investigate the influence of ac ageing on space charge dynamics in low-density polyethylene (LDPE). LDPE films with 200mm were aged at 50 kV/mm at 50 Hz for various times at ambient temperature. Space charge dynamics in the samples prior to and after ageing were monitored using the pulsed electroacoustic (PEA) technique under dc electric stress. The results indicate that there is a significant amount of homocharge accumulation in the unaged sample due to charge injection. These injected charges are the captured by the deep traps originated from the interface between crystalline and amorphous regions in LDPE. Ageing under ac condition does not necessarily lead to an increase in amount of charge in the bulk but leads to an increase in mobility of charge carriers. Chemical analysis by infrared spectroscope (FTIR) reveals there are chemical changes taken place in the bulk of the material after ac ageing. It is believed that the chemical changes introduce shallow traps which promote the movement of charge carriers in the bulk. Consequently, the injected charges spread across the sample
Scirpophaga linguatella Chen
No full textScirpophaga linguatella Chen, Song & Wu, 2006 (Figs 37, 44) Scirpophaga linguatella Chen, Song & Wu, 2006. Zootaxa, 1236: 15. Type locality: China, Yunnan. Description. Body white. Length of labial palpi about 3 times the diameter of compound eyes. Both wings white; without fascia. In male genitalia, subteguminal process lobe-like and linguiform; aedeagus swollen in apical 1/3, three flat plate-like cornuti present, with serrate margin, manica with two groups of spines. Distribution. China (Yunnan).Published as part of Chen, Fu-Qiang & Wu, Chun-Sheng, 2014, Taxonomic review of the subfamily Schoenobiinae (Lepidoptera: Pyraloidea: Crambidae) from China, pp. 163-208 in Zoological Systematics 39 (2) on page 175, DOI: 10.11865/zs20140201, http://zenodo.org/record/461732
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