109,768 research outputs found
Study on Solar KANG Heating System for Cold Areas
No full textAbstractThe current rural traditional heated kang cannot meet people's increasing requirements of comfort and environmental protection. This paper propose solar kang heating system in cold regions. System performance and heating effect were analyzed. We selected two typical rooms. One was set in traditional kang, and the other one was solar Kang type. Using temperature recording instrument and 64 roads inspection instrument and other instruments, we test the indoor temperature and the kang surface temperature of two rooms. Solar kang thermal resistance, heat storage, heat dissipation and heating effect were analyzed and compared. The results of the study show this system have the smaller fluctuation, more comfort while alleviating the kang surface overheat or super-cooling problem. It satisfied the requirements of indoor thermal comfort. The warming rate is 5.17°C/h, and the cooling rate is 3.01°C/h. These are slower than traditional Huokang speed. It improved the heat storage capacity of kang body with surface heat dissipation 1237W. Average temperature of the solar kang heating room was improved 3.28°C. It gets the smaller indoor temperature fluctuation. PMV values are concentrated about -0.5, and this basically meet the requirements of the user comfort
Evaporation of S from Liquid Fe-C-S Alloy
Get PDFEvaporation mechanism of S from liquid Fe-C-S alloys at 1 873 K was proposed by analyzing available experimental data. It has been known that increasing C content in liquid alloy increases activity coefficient of S (f(s)), and it could raise driving force for the evaporation reaction (S) under bar = S(g). However, experimental data of the evaporation of S in the Fe-C-S alloys could not be accounted for only by considering the increases of f(s). In the present study, formation of carbosulfides, CS(g) and CS2(g), was additionally taken into account in order to explain role of C for the accelerated S evaporation. Surface adsorption of S was also taken into account, which retards the evaporation rate of S. An evaporation model equation was formulated. It can be applied to calculate the evaporation rate of S over wider C content (from zero to its saturation to liquid alloy).112Ysciescopu
Closure to “Discussion of \u27measurement of Stiffness Anisotropy in Kaolinite using Bender Element Tests in a Floating Wall Consolidometer\u27 by X. Kang, G.-C. Kang, and B. Bate” by Coffman, Salazar and Zhao
No full textThe authors appreciate the interest of the discussers in this paper. The main arguments of the discussers were: (1) comparing the back-pressure saturated, constant-rate-of-strain consolidation device that incorporated bender elements (BP-CRS-BE device) developed by the discussers to the floating wall consolidometer based bender element testing system in the original paper (Kang, X., Kang, G.-C., and Bate, B., 2014, Shear Wave Velocity Anisotropy of Kaolinite Using a Floating Wall Consolidometer-Type Bender Element Testing System, Geotech. Test. J., Vol. 37, No. 5, pp. 869-883. [DOI: 10.1520/GTJ20120205]); (2) requesting the quantification of both the system lag and the machine deflection; (3) suggesting the authors use cross correlation method to determine the first arrival time because Vs values obtained by time domain method are only approximate, while the latter was the only method used by the discussers in their referenced work (Salazar, S. E. and Coffman, R. A., 2014, Design and Fabrication of End Platens for Acquisition of Small-Strain Piezoelectric Measurements during Large-Strain Triaxial Extension and Triaxial Compression Testing, Geotech. Test. J., Vol. 43, No. 2. pp. 1-11. [DOI: 10.1520/GTJ20140057]); and (4) making misleading arguments regarding the compression and shear waves measurements. In this closure, the authors first briefly compared the BP-CRS-BE device to the floating wall consolidometer based bender element testing system, and pointed out that (1) the well-documented wavelength ratio (Rd ratio) consideration in designing a bender element device and the seemingly unsatisfaction of such consideration in the BP-CRS-BE device, and that (2) both the lack of details in B-value checking to examine saturation and the lack of shear wave velocity resulted from the BP-CRS-BE device to substantiate the arguments of the discussers. Then the authors provided the requested quantifications of both system lag and machine deflection to address some postulations by the discussers. The authors disagreed with Arguments 3 and 4 made by the discussers, and respond accordingly
Microdochium sichuanense L. S. Dissan., J. C. Kang & Maharachch. 2023, sp. nov.
No full textMicrodochium sichuanense L.S. Dissan., J.C. Kang & Maharachch., sp. nov. (FIGUER 2) Index Fungorum Number: IF900348, Facesoffungi: 14277 Etymology:— Referring to the location “ Sichuan Province ” where the fungus was collected Holotype:—KUN-HKAS127240 Saprobic on dead leaves of Poaceae in terrestrial habitats. Sexual morph: Ascomata 100–180 μm high, 60–100 μm diam. (x̅ = 146.3 × 86.9 μm, n = 5), solitary, scattered, appear as black dots on the host surface, square to ellipsoidal, brown, immersed, apapillate, ostiolate. Peridium 10–20 μm wide, evenly thickened, comprising brown cells of textura angularis to textura prismatica, flattened and hyaline towards inner layers, fused with host tissues. Hamathecium comprising hyaline, cylindrical, guttulate, branched paraphyses (2–6 μm wide), arising from base of ascomata. Asci 90–140 × 15–20 μm (x̅ = 110 × 18 μm, n = 15), unitunicate, 8-spored, overlapping 1–2 seriate, clavate to oblong, with a minute J- apical ring or without an epical ring, with a short stipe. Ascospores 10–22 × 4–7 μm (x̅ = 16 × 5.5 μm, n = 15), hyaline, oval to fusiform, sometimes allantoid, straight or slightly curved, guttulate. Asexual morph: Undetermined Culture characteristics:— Colonies on PDA reaching 2 cm diam. after 2 weeks at 20–25 °C, medium dense, circular to slightly irregular, slightly raised, cottony surface smooth, at first white, becoming light yellow when mature, without any pigmentation; reverse yellowish-white. Material examined:— China, Sichuan Province, Chengdu, University of Electronic Science and Technology premises, on dead leaves of an unidentified poaceous host, September 2021, Q Wang W30 (KUN-HKAS127240, holotype), ex-type cultures KUNCC 23–13008 Known distribution:— Sichuan Province, China Notes:— Microdochium sichuanense morphologically resembles M. graminearum and M. shilinense in having solitary, scattered, immersed, apapillate, ostiolate ascomata, textura angularis to prismatica cells in peridium, 8- spored, biseriate with short stipe asci, and hyaline, guttulate, fusiform, straight or curved ascospores. Microdochium sichuanense differs from M. graminearum and M. shilinense in having clavate to oblong asci without an apical ring and aseptate ascospores, while M. graminearum and M. shilinense have fusiform asci with apical ring and 0–3 transversely septate ascospores. Multi-gene phylogenetic analyses (FIGURE 1) show that our collection forms a sister group with the isolates of M. hainanense (SAUCC 210781 and SAUCC 210782) with 60% ML and 0.96 BYPP. It is impossible to compare M. sichuanense and M.hainanense as they occur in different morphs (sexual and asexual). A pairwise nucleotide comparison between the two species showed that M. sichuanense differs from M. hainanense (SAUCC 210782) in 35/566 bp of ITS (6.18%) and 150/797 bp of rpb2 (18.82%). Interestingly, both species were collected from the same host family (Poaceae), but from different locations in China (M. sichuanense: Sichuan Province and M. hainanense: Hainan Province).Published as part of Dissanayake, Lakmali S., Kang, Ji-Chuan & Maharachchikumbura, Sajeewa S. N., 2023, Microdochium sichuanense sp. nov. (Microdochiaceae, Xylariales), from a Poaceae host in Sichuan, China, pp. 206-216 in Phytotaxa 600 (3) on pages 211-212, DOI: 10.11646/phytotaxa.600.3.7, http://zenodo.org/record/808090
Measurement of the ratio of prompt χ c to J / ψ production in pp collisions at √s = 7 TeV
Get PDFThe prompt production of charmonium χ c and J / ψ states is studied in proton-proton collisions at a centre-of-mass energy of √s = 7 TeV at the Large Hadron Collider. The χ c and J / ψ mesons are identified through their decays χ c → J / ψ γ and J / ψ → μ + μ - using 36 pb - 1 of data collected by the LHCb detector in 2010. The ratio of the prompt production cross-sections for χ c and J / ψ, σ (χ c → J / ψ γ) / σ (J / ψ), is determined as a function of the J / ψ transverse momentum in the range 2 < p T J / ψ < 15 GeV / c. The results are in excellent agreement with next-to-leading order non-relativistic expectations and show a significant discrepancy compared with the colour singlet model prediction at leading order, especially in the low p T J / ψ region
Song, Y., Geng, K., Zhang, B., Hyde, K.D., Zhao, W.-S., Wei, J.-G., Kang, J.-C. & Wang, Y. (2013) Two new species of Pestalotiopsis from Southern China. Phytotaxa 126 (1), 22–30.<br />
No full textSONG, YU, GENG, KUN, ZHANG, BIN, HYDE, KEVIN D., ZHAO, WEN-SHENG, WEI, JI-GUANG, KANG, JI-CHUAN, WANG, YONG (2013): Song, Y., Geng, K., Zhang, B., Hyde, K.D., Zhao, W.-S., Wei, J.-G., Kang, J.-C. & Wang, Y. (2013) Two new species of Pestalotiopsis from Southern China. Phytotaxa 126 (1), 22–30.<br>. Phytotaxa 135 (1): 64, DOI: 10.11646/phytotaxa.135.1.8, URL: http://dx.doi.org/10.11646/phytotaxa.135.1.
Evaporation Mechanism of Cu from Liquid Fe containing C and S
No full textA number of liquid-gas experiments were carried out in order to elucidate evaporation mechanism of Cu from liquid Fe containing C and S. Rate of Cu evaporation in liquid Fe droplets at 1873 K (1600 A degrees C) was determined using electromagnetic levitation equipment. Evaporation rate of the Cu under various conditions (flow rate of gas mixtures, initial C, and S concentrations) was examined. It was found from a series of kinetic analyses of the experimental data that Cu evaporates in forms of Cu(g) and CuS(g). As was reported for the Sn evaporation from liquid iron (Jung et al. Met. Mater. Trans. 46B, 250-258, 2014), S plays two roles for the evaporation of Cu: accelerating the rate by forming CuS(g) and decelerating the rate by blocking evaporation sites. As a result of these combinatorial effects, the evaporation of Cu is decelerated at low S content, but is accelerated at high S content. Based on the elucidated mechanism, an evaporation model equation for Cu was developed in the present study, which takes into account (1) evaporation of Cu in the two forms (Cu(g) and CuS(g)), (2) surface blocking by S using ideal Langmuir adsorption, and (3) effect of C. The obtained rate constant of a reaction Cu (i) + S (i) = CuS (i) (g), k (CuS) (R) , is 1.37 x 10(-9) m(4) mol(-1) s(-1), and the residual rate constant, k (CuS) (r) , is 4.11 x 10(-10) m(4) mol(-1) s(-1) at 1873 K (1600 A degrees C). Both of them were found to be one order lower than those for Sn evaporation.1142sciescopu
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