786 research outputs found
Insights into the extraction of various vanadium species by primary amine
No full text
For the purpose of the recovery of the high-purity vanadium product in leaching solution, solvent extraction has been considered as a promising approach. However, the vanadium species varied in different concentrations and pH values in aqueous solution, thus affecting the extraction yield or the reaction product in the process. In this paper, the main species of vanadium in solutions were determined with the equilibrium constants. The extraction reactions were determined based on determined species, then the hydrogen bond association mechanism of the reaction as well as the possible structures of the vanadium complexes were proposed and discussed in detail. This study established a systematic methodology for understanding the transition metal speciation in aqueous solutions as well as the extraction reactions, and envisaged the insights into the mechanism of the transition metal solvent extraction by primary amines.</p
Seasonal variability of picoplankton in the Northern South China Sea at the SEATS station
No full textCodoping Zinc Oxide Nanowires
No full textabstract: The zinc oxide nanowires being grown are not developing properly and need to be fixed. In order to do this, the furnace equipment and experimental procedure must be tested until the results produced yield acceptable quality zinc oxide nanowires. After experimentation the nanowires were produced to an acceptable quality. With quality nanowires to experiment with, testing began to examine the effects of different thicknesses of aluminum dopants. Once doped and annealed, the wires were transferred to a substrate with a grid so contact points could be applied. However; the experiment was phased out once this step was half way complete due to the lab shifting to examine co-doping zinc oxide nanowires as explored in part two of this paper. The goal of co-doping zinc oxide film is to create an ideal p/n type relationship for power generation, so this project focuses on altering the electrical properties of zinc oxide through doping that will allow more energy to be generated from the solar panels than current zinc oxide solar panels. The zinc oxide film doped with manganese was sputtered onto a silicon substrate. The experiment failed to create a co-doped sample because an x-ray photoelectron spectroscopy reading of the sample proved no nitrogen existed in the zinc oxide doped with manganese film. This experiment leads into this research teams work with co-doping, so instead of viewing this project as a failure it is seen as a learning experience. The research team is examining the results and creating new experiments to run to fix the problem. I currently work with my mentor Dr. Hongbin Yu and Seung Ho Ahn while doing research
Pockmark activity inferred from pore water geochemistry in shallow sediments of the pockmark field in southwestern Xisha Uplift, northwestern South China Sea
No full textVUV-UV-vis photoluminescence, X-ray radioluminescence and energy transfer dynamics of Ce<sup>3+</sup> and Eu<sup>2+</sup> in Sr<sub>2</sub>MgSi<sub>2</sub>O<sub>7</sub>
No full textCe3+ and Eu2+ doped and Ce3+-Eu2+ co-doped Sr2MgSi2O7 phosphors are prepared via a high-temperature solid-state reaction technique. The synchrotron radiation vacuum ultraviolet-ultraviolet (VUV-UV) excitation and ultraviolet-visible (UV-vis) emission spectra of diluted Ce3+ and Eu2+ doped Sr2MgSi2O7 samples are measured at cryogenic temperatures. The electron-vibrational interaction (EVI) between Ce3+ and its surroundings is analyzed. The dependencies of the 4f-5d transitions of Ce3+ on the structure of the host compounds Sr2MgSi2O7, Ba2MgSi2O7 and BaMg2Si2O7 are discussed in detail. Then the thermal quenching channel is proposed based on the measurements of temperature dependent luminescence intensities and decay times of Ce3+ and Eu2+ in Sr2MgSi2O7, and the Ce3+ → Eu2+ energy transfer mechanism is understood by three luminescence dynamic models. In addition, Sr2MgSi2O7:Ce3+/Eu2+ samples are evaluated for the possibilities of X-ray detection applications using X-ray excited luminescence (XEL) spectroscopy, and it was found that they are not suitable.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.RST/Luminescence Material
Learning Lane Change Trajectories From On-road Driving Data
No full textLane change is one of the most principle driving behaviors on structure roads. It frequently happens in daily driving. A key issue in lane change technique is trajectory planning, where a set of trajectories describing possible vehicle motions are generated by applying a parametric function, and by uniformly sampling the end states in configuration space; the trajectories are then examined to find an optimal one for execution. However, such a trajectory set has poor efficiency due to the large sample number. Many trajectories in this set seldom happen in real human driving behaviors. In this research, lane change trajectories are collected from real driving data of different drivers. Their statistics are analyzed, through which, a simplified trajectory set is generated. Experiment results show that the trajectory set has much less number of samples but can still guarantee to cover usual lane change behaviors of human being.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000309167700145&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Automation & Control SystemsComputer Science, Artificial IntelligenceEngineering, Electrical & ElectronicTransportation Science & TechnologyCPCI-S(ISTP)
A Vehicle Model for Micro-Traffic Simulation in Dynamic Urban Scenarios
No full textIn order to improve energy efficiency of transport systems, eco-driving strategies are studied world-widely. However, most literatures on eco-driving based on traditional traffic flow models, are greatly simplified, and can not evaluate the effects on detailed driving behaviors. By referring to robot motion planning approaches, in this research a microscopic vehicle model is developed and it can represent different driving behaviors, such as aggressive or conservative driving; a collision detection algorithm is proposed that takes O(1) time to check for a trajectory's collision, enabling realtime planning; and a traffic simulation system is developed by incorporating traffic rules, so that the driving behaviors such as observing or not observing traffic rules can also be represented. Experiments are conducted on the simulation platform, and the performance of different driving behaviors on travel time, mileage, comfort and eco is studied.Automation & Control SystemsEngineering, Electrical & ElectronicRoboticsCPCI-S(ISTP)
Development of Silver-Free Silicon Photovoltaic Solar Cells with All-Aluminum Electrodes
No full textabstract: To date, the most popular and dominant material for commercial solar cells is
crystalline silicon (or wafer-Si). It has the highest cell efficiency and cell lifetime out
of all commercial solar cells. Although the potential of crystalline-Si solar cells in
supplying energy demands is enormous, their future growth will likely be constrained
by two major bottlenecks. The first is the high electricity input to produce
crystalline-Si solar cells and modules, and the second is the limited supply of silver
(Ag) reserves. These bottlenecks prevent crystalline-Si solar cells from reaching
terawatt-scale deployment, which means the electricity produced by crystalline-Si
solar cells would never fulfill a noticeable portion of our energy demands in the future.
In order to solve the issue of Ag limitation for the front metal grid, aluminum (Al)
electroplating has been developed as an alternative metallization technique in the
fabrication of crystalline-Si solar cells. The plating is carried out in a
near-room-temperature ionic liquid by means of galvanostatic electrolysis. It has been
found that dense, adherent Al deposits with resistivity in the high 10^–6 ohm-cm range
can be reproducibly obtained directly on Si substrates and nickel seed layers. An
all-Al Si solar cell, with an electroplated Al front electrode and a screen-printed Al
back electrode, has been successfully demonstrated based on commercial p-type
monocrystalline-Si solar cells, and its efficiency is approaching 15%. Further
optimization of the cell fabrication process, in particular a suitable patterning
technique for the front silicon nitride layer, is expected to increase the efficiency of
the cell to ~18%. This shows the potential of Al electroplating in cell metallization is
promising and replacing Ag with Al as the front finger electrode is feasible.Dissertation/ThesisDoctoral Dissertation Electrical Engineering 201
Parena (Crossoglossa) laesipennis
No full text[2] Parena (Crossoglossa) laesipennis (Bates, 1873) Habitus: Figs 17A–D. Male genitalia: Figs 18, 19. Gonocoxites of ovipositor: Fig. 11Z. Bates, 1873: 317 (original: Crossoglossa; type locality: Nagasaki; lectotype in MNHN); Jacobson, 1907: 403 (Crossoglossa); Jedlička, 1946: 8; Jedlička, 1963: 439; Habu, 1967: 168; Habu, 1982: 118; Lafer, 1989: 213; Park & Kwon, 1998: 36 (South Korea); Kirschenhofer, 2011: 66. Karube et al., 2012: 3 (Ogasawara Is.). Misidentification: Parena cavipennis (Bates): Habu, 1942: 78 (Japan). Misidentification: Parena rufotestacea Jedlička: Xie & Yu, 1993: 194 (China: Fujian, Yunnan); Kirschenhofer, 2006: 89; Park et al., 2006: 102 (Vietnam). Type material examined. Crossoglossa laesipennis Bates: Lectotype (MNHN, Fig. 17A), designated herein: female, body length = 11.9 mm, pin mounted, " NAGASAKI ", "TYPE" [red label], " Ex Musaeo H.W. Bates, 1892", "MUSEUM PARIS 1952, Coll. R. OBERTHUR", " Crossoglossa laesipennis Bates " [hand written]. Paralectotype (MNHN): 1 female, teneral, without abdomen, labia glued on board and solely pinned, " NAGASAKI ", "PARATYPE" [red label], " Ex Musaeo H.W. Bates, 1892", "MUSEUM PARIS 1952, Coll. R. OBERTHUR". Notes on types. This species was originally described from an unspecified number of specimens from " Nagasaki ", but more than one specimen was implied. In the collection of MNHN, a total of two specimens from Bates's collection accord with the original description. We herein designate the one bearing Bates's handwriting label (Fig. 17A) as the lectotype. We also examined a female in NHML labeled as "type", with a determination label not in accord with Bates's handwriting, and the locality "Hiogo" different from the type locality in the original description. Thus, this one is considered to be mislabeled as type and excluded from the type series. Non-type material examined. Japan: 1 female (NHML), "HIOGO", "Japan. / G. Lewis. / 1910-320", " Type " [round label with red circle], " Crossoglossa / laesipennis / Bates ". 1 male (IZAS), "Mt. Tatsurayama Tsushima Is. Nagasaki Pref., 1989.VIII.2, M. Ito leg.". 1 male (OMNH), "Iwawaki Osaka, 1959.VI.27, T. Kawatsu". 1 female (OMNH), "Izumi, Osaka-Pref., 1986.VII.20, leg. O. Tohinaga". 1 male (OMNH), "Mt. Karasuga-dake, nr. Mikumo. Kouga Shiga, 1980.XI.30, Mitsuo Goto leg.". 1 female (OMNH), "Mt. Oikedake Mie-Pref., 1956.IV.22, Coll. Zen. Naruse". China: 1 female (SNU), " Zhejiang, Lin’an, W. Tianmushan, 2008.VI., Huang Hao lgt.". 1 female (IZAS), " Zhejiang, W. Tianmushan, 1200 m, Bi Wenxuan lgt., 2010.V.2 ". 1 female (IZAS), " Zhejiang, W. Tianmushan, Song Haitian lgt., 2010.V.1 ". 1 ex (IZAS), " Hunan, Ningxiang, Huaminglou, Shili vill. 2015.IX.29 D, 152 m, N28.0974 E112.6638, Zhao KD. lgt.". 1 ex (IZAS), " Hunan, Ningxiang, Huaminglou, Shili vill. 2015.IX.27 D, 148 m, N28.0939 E112.6640, Yao J. lgt.". 1 female (IZAS), " Hunan, Mangshan, 2007.VIII.24, Tang Guo lgt.". 1 female (IZAS), " Fujian, Jianyang, Huangkeng, Guilin, 270–340 m, 1960.IV.8, Zhang Yiran lgt.". 1 female (IZAS), " Guangdong, Ruyuan, Nanling, Ruyang station, N24.93450, E113.01588; 1266 m, 2008.VII.20, Liang Hongbin lgt.". 1 female (IZAS), " Hainan, Bawangling, 1000 m, 1997.V.22, Yu Peiyu lgt.". 1 female (IZAS), " Hainan, Limushan, Sanquling, 2007.11.30, Zhu Xiaoyu lgt.". 1 female (CAU), " Hainan, Yinggeling, Baisha, Hongmao vill., 2007.X.19, Wang Fang lgt.". 1 male (ZWWC), " Chongqing, Jiangjin, Simianshan, 2007.X.22–23, Zhang Weiwei lgt.". 1 male (IZAS), " Yunnan, Xishuangbanna, Mengzhe, 870 m, 1958.VI.30, Wang Shuyong lgt.". 1 female (IZAS), " Yunnan, Xishuangbanna, Xiaomengyang, 850 m, 1957.X.24, Wang Shuyong lgt.". 1 female (IZAS), " Yunnan, Xishuangbanna, Meng’a, 1050–1080 m, 1958.V.11, Wang Shuyong lgt.". 1 female (IZAS), " Yunnan, Mengla, Menglun 55 km, 703 m, 2013.X.3, Yang Xiaodong lgt.". 1 male (IZAS), " Yunnan, Fugong county, Pihe, Bajiao, N26.54816, E98.89576, 1120 m, 2005.VIII.23, Liang Hongbin lgt.". 1 female (CAS), " Yunnan, Tengchong county, Mangbang, Longwenqiao, N25.02329, E98.67710, 1290 m, 2006.VI.5, Liang Hongbin & Hu Peng lgt.". 1 female (CAS), " Yunnan, Tengchong coungty, Mangbang, Longwenqiao, N25.02396, E98.67675, 1285 m, 2006.VI.5, Kavanaugh D. & Brett R. lgt.". 1 female (IZAS), " Yunnan, Gongshan county, btw. Pulahekou and Gazutian, 2007.IX.25, Shi Hongliang lgt." . 1 male (IZAS), "Tengchong, Qushi, Heiyuhe, 1490 m, 2002.X.1, Situ Yingxian lgt.". 1 male (IZAS), "Yongde county, Yinchang, 2300 m, 2002.VI.29, Song Jinxin & Huang Kunyun lgt.". 1 female (IZAS), " Yunnan, Ruili, Nongdao town, way btw Dengga and Sepengqiao, N23.95285, E97.59808 – N23.97518, E97.56944, 927– 807 m, 2009.VIII.11, on vegetation, Shi Hongliang lgt.". 1 male (IZAS), " Yunnan, Jingmai, Huimin, Lancang, 100°01’34.42’’E, 22°12’04.79’’N, 1488 m, Jianfeng Liang, Chengcong Yu, 2017.VII.11, Net capture". 1 male (IZAS), " Yunnan, Ruili, Bangda vill, 1432 m, 2015-IX-3, Yang Xiaodong lgt." . 1 female (IZAS), " Yunnan, Ruili, Bangda vill, 1432 m, 2015-IX-10, Yang Xiaodong lgt.". 1 male (IZAS), "China, Yunnan, Wenshan, Zhuilijie, 1734 m, 2019.V-23, Leg. Y.-Q. LU". 1 male (IZAS), " Xizang, Mêdog county, 1111 m, 2014-VII-30, Yang Xiaodong lgt.". 1 male, 1 female (CCCC), "Taiwan, Taitung county, Orchid Island, 2006. V.9, Chen Changchin lgt.". 1 male (CCCC), "Taiwan, Taipei, Yingchiling, 1999.VI.30, Chou Wen-I lgt." . 1 female (CCCC), "Taiwan, Nantou county, Puli town, Shitsaitou, 1994.IV.15, Chen Changchin lgt.". 1 female (CCCC), "Taiwan, Pintung county, Hengchun town, Nanrenshan, 1992.XII.17, Chou Wen-I lgt." . 1 female (CCCC), "Taiwan, Taipei county, Sanhsia town, 1992.V.2, Chen Changchin lgt.". 2 ex (CCCC), "Taiwan, Taoyuan county, Fuhsing, Sankuang, 1994.VII.14 ". 1 ex (MTMB), "Taiwan, Nantou county, Puli, singled, 19.XI.2002, leg. H.R. Tzuoo". Vietnam: 1 ex (MNHN), "Tonkin, Reg de Hoa Binh, A. de Cooman, 1927". 1 female (CRS), "Vietnam, Lao Cai prov., near Sa Pa, Cat Cat vill. env. H= 1200 m, 10–20.V.2018 " . Laos: 1 male (NHMB), "LAO, Phongsaly prov. 21°41-2' N 102°6 -8'E, 28.v.-20.vi.2003, Phongsaly env., ~ 1500 m, Pacholatko leg.". 2 ex (NHMB), "LAO, Phongsaly prov. 21°41-2' N 102°6 -8'E, 28.v.-20.vi.2003, Phongsaly env., ~ 1500 m, Vit Kuban leg.". 2 ex. (NHMB), "LAOS-NE, Xieng Khouang prov. 19°37-8' N 103°20 -1'E, 30 km NE Phonsavan: Ban Ba Lam- Phou Sane Mt., 1300–1700 m, 10–30.v.2009, M. Geiser leg.". 3 ex (NHMB), "LAOS-NE, Xieng Khouang prov. 19°37-8' N 103°20 -1'E, Phonsavan (30km NE): Phou Sane Mt., 1400–1700 m, 10-30.v.2009, D. Hauck leg." . 1 ex (NHMB), "LAOS-NE, Xieng Khouang prov. 19°37-8' N 103°20' E, Phonsavan (30km NE): Phou Sane Mt., 1400–1500 m, 10-30.v.2009, Z. Kraus leg.". 1 ex (NHMB), "LAOS-NE, Houa Phan prov. 20°11-13’ N 103°59’ -104°1’E, Ban Saluei-Phou Pane Mt, 9.-17.vi.2009, 1300–1900 m, M. Geiser leg.". Myammar: 1 female (NHML), "Birmah, Rubymes, Dohelly", "60863", "Fry coll. 1905.100". Thailand: 1 ex (CMB), "N.W. Thailand, Mae Hong Son, 17– 18.5.1999, R. Grimm". 1 ex (CSF), "Thailand, Chiang Mai prov. 25 km N of CHIANG DAO, 28- 30.6.2002, WGS 84: 19°40'N, 098°50'E, lgt. Fouque R.+H.". 1 ex (CSF), "Thailand, 7.-12.5. MAE HONG SON prov. SOPPONG, 1500 m, 19°27' N 98°20' E, lgt. S. Becvar, 1996". India: 1 ex (NHMB), "Durpin 1200 m, 26.III.1986 "; "Indian Darjeeling D. Bhakta B.". 1 ex (NHMB), "Chuba Busty, 1080 m, 18.IV.1984 "; "Darjeeling D. India Bhakta B.". 1 ex (NHMB), "India VII–VIII, Darjeeling D. Bhakta B. 1985". 1 male (NHMB), ""Indien Darjeeling D. Bhakta B.", "Reenak, 9-13.V.90". 1 ex (NHMB), "Kalimp. 1000 m, Rinkingpong, 22.IV.1987 "; "Indien Darjeeling D. Ch.J. Rai". 1 ex (NHMB), "Kalimpong, 5.VII.1981 "; "Darjeeling Distr. India Bhakta B.". 1 ex (MNHN), "Rhenok, 3000p., VII. VIII.1900, Sikkim?". 1 female (NHMB), "NE India, Meghalaya, Tura peak, 600– 1000 m, 25°30’ N 90°14 "E, L. Dembicky leg., 12.-22.vi.2007 ". Nepal: 1 ex (NHMB), "Burhanilkanth, 1440–1650 m, 16.VI.1983 "; "Nepal, Kathmandu v., M. Brancucci". 1 ex (NHMB), "Nepal Kathmandu V., Godavari 1500 m, M. Brancucci"; "21.-27.VI, 1989". 1 ex (NHMB), "Nepal Kathmandu V. Burhanikanth"; " 19.V.1989 1450 m, M. Brancucci". 1 ex (NHMB), "Nepal Kathmandu V. Godavari 1500 m "; " 21-27.V.1989 1450 m, M. Brancucci". 1 male (NHMB), "Godavari 1500–1700 m, 21.5", "Nepal, 1977 Wittmer, Brancucci". 1 male (NHMB), "Balaju 23.V. 1350 m", "Nepal, 1977, Wittmer, Brancucci" . 1 ex (NHMB), "Nepal Bagm ati, Sindhupalchok, Parahang-Dapkakharka", " 2100 m, 11.VI.99, M. Brancucci". 1 ex (NHMB), "Nepal: Kosi - #13 Depitar 27°27’N/ 87°17E to Barabishe 27°26N/87°18’E, 1250– 560 m, 12.vi.01". 1 ex (NHMB), "Nepal: Kosi - #10 Mure 27°30’N/ 87°16E 2000–2100 m, 6–8/11–12.vi.01". 1 ex (CSF), "NEPAL Annapurna Himal, Lumle, 17. – 22.06.1999, A. Kudrna JR. Lgt.". Malaysia: 1 male (NHMB), "MALAYSIA, PAHANG, 2003 Cameron Highlands; TANAH RATA, 1500–1700 m, P. Pacholatko leg. 24.-31.i.". Comparisons. P. laesipennis is most similar to P. obenbergi, and also might be confused with a sympatric species, P. cavipennis. See "Comparisons" under the latter two species. Description. Body length 9.5–12.6 mm. Dorsum yellowish brown to reddish brown; basal three antennomeres, and basal half of antennomere 4 brown, remainder of antennae black; venter brown. Pronotum strongly transverse, PW/PL = 1.50–1.65, usually much wider than head, PW/HW = 1.05–1.14; widest at anterior third, lateral explanations very wide. Elytra without microsculpture, or with very weak isodiametric microsculpture near apices; striae not incised, replaced by rows of fine punctures; intervals completely flat, very finely and sparsely punctate; disc well depressed near middle of intervals 3 to 6, depressions subtriangular; apical truncation distinct, straight or slightly curved, outer apical angles weakly angulate, forming very blunt obtuse angles; sutural angles sharply pointed, forming short denticles. Median lobe of aedeagus gradually narrowed to apex, ventral margin straight or gently curved; apical lamella more or less bent toward dorsum, length 1.50–1.65 folds as its basal width, apex rounded. Endophallus very densely scaled on basal sheath, base of apical sheath discoid in dorsal view; squamate sac equally divided, situated on basal fifth of median lobe, right to squamate sheath, distal sac slightly closer to base than proximal sac (Fig. 18A). Gonocoxite II of ovipositor dichotomous, inner branch with two long ensiform setae apically, outer branch slightly longer than the inner one, apex with two or three ensiform setae, much shorter than those on the inner branch (Fig. 11Z). Distribution (Map 3, red). China (Zhejiang, Hunan, Fujian, Guangdong, Hainan, Chongqing, Yunnan, Xizang, Taiwan), Japan, South Korea, Vietnam, Laos, Thailand, Myanmar, Malaysia, India (Darjeeling), Nepal. Geographical variation. The southwestern specimens (from southwest China, Laos, Thailand, Nepal, and India, Figs 17C–D, 18A, 18B, 19A, 19C) of P. laesipennis are slightly different from the typical specimens (from Japan and Taiwan, Figs 17A–B, 19B). They are usually slightly darker and smaller sized (9.5–11.0 mm versus 11.0– 12.6 mm), and with elytral microsculpture less obvious. The male genitalia also differ slightly as well: in the southwestern specimens, the apical lamella is generally slightly more bent to the dorsum, and the ventral margin is slightly more curved in lateral view. However, the above differences are subtle, not always stable, and intermediate status is present in some individuals from Eastern China. Therefore, we believe that the above characters gradually vary by distance from northeast to southwest, and that all the above populations should be classified as the same species.Published as part of Shi, Hongliang & Liang, Hongbin, 2023, Taxonomic revision of the genus Parena Motschulsky, 1860 (Coleoptera, Carabidae, Lebiini, Metallicina), pp. 1-144 in Zootaxa 5286 (1) on pages 32-35, DOI: 10.11646/zootaxa.5286.1.1, http://zenodo.org/record/795893
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