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Journal articles on the topic 'Longtang'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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1

Wu, Tong. "The Spatial Signification of Shanghai Shikumen Longtang." Chinese Semiotic Studies 11, no. 1 (January 1, 2015): 1–37. http://dx.doi.org/10.1515/css-2015-0001.

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AbstractIn this paper I claim that the spatial structural system of Shanghai Shikumen Longtang constitutes a sign system based on its architectural semiotics. The paper focuses on the structure of the architectural space, including the interactive relationship between the architectural spatial structure and its residents. The research agenda undertakes a theoretical study of modern architectural semiotics by means of syntactic and semantic analyses of the spatial structure of Shanghai Shikumen Longtang, including as well an analysis of the pragmatics of meaning in production and reproduction in Shanghai Shikumen Longtang. The application of spatial language grammar in the analysis reveals the meaning of the sign system of the architectural spatial structure and pragmatic communication of Shanghai Shikumen Longtang, decodes the profound and intricate signification in the spatial system of Shanghai Shikumen Longtang and suggests a deeper and broader view for recognizing the underlying meaning system of the Longtang in the urban space of modern Shanghai City.

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2

Hsee, Christopher K. "Longtang (Long Alley) in Shanghai." Management and Organization Review 8, no. 3 (November 2012): 584. http://dx.doi.org/10.1111/j.1740-8784.2012.00315.x.

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3

Wang, Anyi, and Andrea Lingenfelter. "The White Horse in the Longtang." Chinese Literature Today 6, no. 2 (July 3, 2017): 29–34. http://dx.doi.org/10.1080/21514399.2017.1375281.

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4

Xu, Dayong. "RESEARCH ON SUPPLY CHAIN MANAGEMENT STRATEGY OF LONGTANG ELECTRIC ENGINEERING CO. LTD." Acta Electronica Malaysia 3, no. 1 (January 7, 2019): 10–13. http://dx.doi.org/10.26480/aem.01.2019.10.13.

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5

Chen, Longtang L., and Steven P. Wise. "Conditional Oculomotor Learning: Population Vectors in the Supplementary Eye Field." Journal of Neurophysiology 78, no. 2 (August 1, 1997): 1166–69. http://dx.doi.org/10.1152/jn.1997.78.2.1166.

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Chen, Longtang L. and Steven P. Wise. Conditional oculomotor learning: population vectors in the supplementary eye field. J. Neurophysiol. 78: 1160–1163, 1997. We have shown previously that the activity levels and preferred directions of supplementary eye field neurons change as monkeys learn to associate nonspatial visual information with a saccade (or the spatial target of that saccade). The present report describes changes in neuronal population vectors (PV) during such learning. PVs based on neuronal activity shortly before and after saccades predicted movement direction poorly in the earliest stage of learning, but as monkeys mastered novel stimulus-response mappings, PV accuracy and magnitude increased significantly.

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6

Li, Fangfang, Ye Zhao, Li Gao, Jia Liang, and Hanyue Pan. "Diagnosis and evaluation of the health status of sediment-water-farmland-rice system in Longtang." Environmental Science and Pollution Research 28, no. 2 (September 2, 2020): 2269–78. http://dx.doi.org/10.1007/s11356-020-09490-w.

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7

Dequan, Shuai, Zhang Shouting, and Hu Xiaoqiang. "Algal-bacterial fabrics of ores and their genetic implications in the longtang lead-zinc deposit at Yanbian, Sichuan." Chinese Journal of Geochemistry 14, no. 3 (July 1995): 220–30. http://dx.doi.org/10.1007/bf02842045.

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8

Huang, De-Yin, Chuan-Ping Liu, Fang-Bai Li, Tong-Xu Liu, Cheng-Shuai Liu, Liang Tao, and Yan Wang. "Profiles, sources, and transport of polycyclic aromatic hydrocarbons in soils affected by electronic waste recycling in Longtang, south China." Environmental Monitoring and Assessment 186, no. 6 (January 22, 2014): 3351–64. http://dx.doi.org/10.1007/s10661-014-3622-z.

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9

Yang, Xing-Jian, Zhi Dang, Fang-Li Zhang, Zhao-Ying Lin, Meng-Yao Zou, Xue-Qin Tao, and Gui-Ning Lu. "Determination of Decabrominated Diphenyl Ether in Soils by Soxhlet Extraction and High Performance Liquid Chromatography." Scientific World Journal 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/840376.

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This study described the development of a method based on soxhlet extraction combining high performance liquid chromatography (soxhlet-HPLC) for the accurate detection of BDE-209 in soils. The solvent effect of working standard solutions in HPLC was discussed. Results showed that 1 : 1 of methanol and acetone was the optimal condition which could totally dissolve the BDE-209 in environmental samples and avoid the decrease of the peak area and the peak deformation difference of BDE-209 in HPLC. The preliminary experiment was conducted on the configured grassland (1 μg/g) to validate the method feasibility. The method produced reliable reproducibility, simulated soils (n=4) RSD 1.0%, and was further verified by the analysis e-waste contaminated soils, RSD range 5.9–11.4%. The contamination level of BDE-209 in burning site was consistent with the previous study of Longtang town but lower than Guiyu town, and higher concentration of BDE-209 in paddy field mainly resulted from the long-standing disassembling area nearby. This accurate and fast method was successfully developed to extract and analyze BDE-209 in soil samples, showing its potential use for replacing GC to determinate BDE-209 in soil samples.

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10

Yang, Hongzhi, Liangbiao Lin, Liqing Chen, Yu Yu, Du Li, Jingchun Tian, Wen Zhou, and Jianhua He. "Characteristics of Mineralogy, Lithofacies of Fine-Grained Sediments and Their Relationship with Sedimentary Environment: Example from the Upper Permian Longtan Formation in the Sichuan Basin." Energies 14, no. 12 (June 19, 2021): 3662. http://dx.doi.org/10.3390/en14123662.

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The Longtan Formation of the Upper Permian in the Sichuan Basin has become a significant target for shale gas exploration in recent years. Multiple methods, including outcrop observations, thin sections, total organic matter content, X-ray diffraction and scanning electron microscopy were used to investigate the mineralogy, shale lithofacies assemblages and their relationships with the deposition environment. The mineral composition of the Longtan Formation has strong mineral heterogeneity. The TOC values of the Longtan Formation have a wide distribution range from 0.07% to 74.67% with an average value of 5.73%. Four types of shale lithofacies assemblages of the Longtan Formation could be distinguished, as clayey mudstone (CLS), carbonaceous shale (CAS), siliceous shale (SS) and mixed shale (MS) on the basis of mineral compositions. The TOC values of various types of shale lithofacies assemblages in the Longtan Formation varied widely. The shore swamp of the Longtan Formation is most influenced by the terrestrial input and mainly develops CLS and MS. The tidal flat is influenced by the terrestrial input and can also deposit carbonate minerals, developing CLS, CAS and MS. The shallow water melanged accumulation shelf develops CAS and MS, dominated by clay and carbonate minerals. The deep water miscible shelf develops CLS and SS, whose mineral composition is similar to that of the shore swamp, but the quartz minerals are mainly formed by chemical and biological reactions, which are related to the Permian global chert event. The depositional environment of the Longtan Formation controls the shale mineral assemblage of the Longtan Formation and also influences the TOC content.

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11

Yu, Ling Ling. "Damping Value for Seismic Response Analysis of Long-Span Bridges." Applied Mechanics and Materials 90-93 (September 2011): 1522–25. http://dx.doi.org/10.4028/www.scientific.net/amm.90-93.1522.

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The current problems on damping in seismic response analysis of bridges is presented. The Rayleigh damping theory is simply introduced in this paper. Taking the Longtan River Bridge for instance, the finite element model of Longtan River Bridge (left line) is established. Then, the dynamic properties of the bridge is analyzed. Based on this, the Rayleigh damping constants and in an ANSYS dynamic analysis are obtained.

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12

Gao, Cai Xia, Long Yi Shao, Cai Hong Gao, and Chang Lin Li. "Paleogeolography of early Coal-Forming of late Permian in Chongqing." Advanced Materials Research 734-737 (August 2013): 235–40. http://dx.doi.org/10.4028/www.scientific.net/amr.734-737.235.

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A total of two third-order sequences are subdivided in Late Permian. Sequence 1 is from the bottom of the Longtan Formation to the bottom of C16 coal in Longtan Formation,representing a transgressive to regressive cycle,and the Sequence 2 is from the bottom of C16 coal in Longtan formation to the top of the Changxing Formation. From Maokou formation to the first flooding surface (the bottom of the C25) is the low systems tract in sequence 1(the earlier stage of coal accumulation). The palaeogeographic map has been reconstructed based on the contour maps of a variety of palaeogeographic parameters including total thickness of strata,thickness of sandstone,thickness of mudstone,and sandstone-mudstone ratio. The paleogeographic units include lowlandhighland eluvial plain and bay-lagoon-tidal. The transgression comes from south and the sediment provenances are mainly from the Kangdian old land in the west.

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13

Hidayat, Thomas, Mennofatria Boer, Mohammad Mukhlis Kamal, Zairion Zairion, and Ali Suman. "REPRODUCTIVE BIOLOGY OF LONGTAIL TUNA (Thunnus tonggol) IN THE JAVA SEA." Indonesian Fisheries Research Journal 26, no. 2 (December 8, 2020): 119. http://dx.doi.org/10.15578/ifrj.26.2.2020.119-130.

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Longtail tuna (Thunnus tonggol) is one of common economically important pelagic fish species in Indonesia. The objective of this study is examining the biology of reproduction, consisting of length of weight relationship, sex ratio, maturity stage, gonado somatic index (GSI), length at first capture, and length at first maturity and spawning pattern. A total of 633 longtail tuna, ranging 29-58 cmFL and consisting of 293 males and 340 females, were collected from the Java Sea between April 2018 and March 2019. The results showed that the longtail tuna growth pattern was isometric. The sex ratio was not significantly different between male and female. The length of first capture longtail tuna of drift gillnet (43.2 cmFL) was bigger than the length at first maturity (42,3 cmFL). This indicates that the most of longtail tuna caught by drift gillnet have already spawned. The peak’s spawning season occurred in May and November, with fecundity ranging from 783,597 - 1,579,160 eggs. Longtail tuna has multiple spawning pattern

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14

Xu, Yang, Ben Yuan, and Hui Zhang. "Research on the renovation of Longtan Village in Guizhou Province based on spatial syntax." E3S Web of Conferences 233 (2021): 01116. http://dx.doi.org/10.1051/e3sconf/202123301116.

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With the gradual deepening of National Rural Revitalization Strategy, investment, tourism of traditional natural villages has become a hot spot in recent years. Taking the traditional village renewal of the Longtan Village in Guizhou Province as an example, this paper uses the space syntax theory and method to establish axis model and horizon model by using Depthmap software to analyze the integration value, depth values, connection value and line of sight integration degree of Longtan Village street space, and to explore the method of scientifically and quantitatively guiding the project renewal and reshaping the vitality of traditional village street space.

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15

Chen, Shuya, Yanping Shi, Xianyu Yang, Kunzhi Xie, and Jihua Cai. "Design and Evaluation of a Surfactant–Mixed Metal Hydroxide-Based Drilling Fluid for Maintaining Wellbore Stability in Coal Measure Strata." Energies 12, no. 10 (May 16, 2019): 1862. http://dx.doi.org/10.3390/en12101862.

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Co-exploitation of coal measure gases (coalbed gas, shale gas, and tight sandstone gas) puts a higher requirement on drilling fluids. Conventional drilling fluids have disadvantages, such as causing problems of borehole collapse, formation damage, and water blockage. This paper proposes a set of high inhibitive and low-damage drilling fluids that function by electrical inhibition and neutral wetting. Zeta potential results showed that the negative electrical property of Longtan coal in Bijie, Guizhou, can be reversed by organic mixed metal hydroxide (MMH) and the cationic surfactant alkyl trimethylammonium bromide (CS-5) from −3.63 mV to 19.75 mV and 47.25 mV, respectively. Based on the contact angle and Fourier Transform Infrared Spectroscopy (FT-IR) results, it can be concluded that chemical adsorption dominates between the Longmaxi shale and surfactants, and physical adsorption between the Longtan coal and surfactants. A compound surfactant formula (0.001 wt% CS-4 + 0.001 wt% CS-1 + 0.001 wt% CS-3), which could balance the wettability of the Longmaxi shale and the Longtan coal, making them both appear weakly hydrophilic simultaneously, was optimized. After being treated by the compound surfactants, the contact angles of the Longmaxi shale and the Longtan coal were 89° and 86°, respectively. Pressure transmission tests showed that the optimized combination of compound surfactants and inorganic MMH (MMH-1) could effectively reduce permeability of the Longmaxi shale and the Longtan coal, thus retarding pore pressure transmission in coal measure strata. Then, the proposed water-based drilling fluid (WBDF) system (4 wt% sodium bentonite + 1.5 wt% sodium carboxymethyl cellulose + 2 wt% lignite resin + 5 wt% potassium chloride + 3 wt%MMH-1 + 0.001 wt% CS-4 + 0.001 wt% CS-1 + 0.001 wt% CS-3) was evaluated based on parameters including rheology, American Petroleum Institute (API) filtration, electrical property, wettability, inhibition capability, reservoir protection characteristics, and anti-pollution performance. It had an API filtration of 7 mL, reservoir damage rate of 10%, moderate and acceptable viscosity, strong inhibition capability to coal measure strata rocks, good tolerance to inorganic pollutants and drilling cuttings, and environmentally friendly properties. It could meet wellbore stability and reservoir protection requirements in the co-exploitation of coal measure gases.

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16

Gan, Deqing, Xi Yang, Yunpeng Zhang, and Xinyu Wei. "Stability Analysis of Underground Multicavities in Bench Blasting Vibration." Mathematical Problems in Engineering 2019 (January 2, 2019): 1–10. http://dx.doi.org/10.1155/2019/4014761.

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Underground cavities formed by underground mining activities are a potential threat to open-pit mining activities. Longtan Village Iron Mine is located in Chengde city, Hebei province, China. The open-pit mining and underground mining of Longtan Village Iron Mine are simultaneously performed. Cavities will remain after underground mining. When mining is performed on the top of the underground cavities in the open pit, concerns arise regarding the closest distance to prevent the collapse of the cavities. (The closest distance is the safe distance between the explosive and the cavities. If the distance between the explosive and the cavities is less than the closest distance, the stability of the cavities will be affected.) The collapse will endanger the safety of the workers and equipment in the open pit. Therefore, it is necessary to estimate the stability of the underground cavities near the bench blasting. In this paper, a series of bench blast tests was performed, and the site-specific attenuation relations of the PPV (Peak particle velocity) and principal frequency of Longtan Village Iron Mine were obtained. Then, an ANASYS three-dimensional numerical model was created, and the propagation of the blast wave and the response of the multicavities were calculated by LS-DYNA. The accuracy of the simulation was verified. However, the bench blast tests do not affect the stability of the cavities. The formula to calculate the closest distance was obtained, which can be used as an approximate guide when designing the bench explosion of Longtan Village Iron Mine. Workers can mine in a safe area of the open pit, and the stability of the cavities will not be affected.

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17

Dai, Jun Ge, Yun Nong, Jun Feng Dai, Zuo Wang Zhou, Ji Ping Qiao, and Chun Qing Guo. "Groundwater Quality Evaluation of Beihai, Gunangxi Beibu Gulf Economic Zone." Advanced Materials Research 726-731 (August 2013): 3407–12. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.3407.

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In order to strengthen the monitoring and control of the groundwater quality, the groundwater of Hetang and Longtan water source regions in Beihai city was taken as example to evaluate the groundwater quality. PH, Total dissolved solids, Chloride, Iron, Nitrate, Ammonia- nitrogen, Cyanide, Mercury, Cadmium, Lead and so on were selected as the main factors of water quality evaluation. Single component and comprehensive evaluation methods were used to analyze the class and change trend of groundwater quality. The results showed that groundwater quality of Longtan was slightly better that of Hetang. F value of these two water source regions varied from 2.14 to 2.19 and met the classⅡ, which showed that the groundwater quality of Beihai City was good.

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18

D., Zhao. "Longtan hydropower project and the financial constraints." Fuel and Energy Abstracts 37, no. 3 (May 1996): 196. http://dx.doi.org/10.1016/0140-6701(96)88735-2.

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19

Yang, Ning, Shu Heng Tang, Song Hang Zhang, and Jun Jie Yi. "Evaluation Shale Pore Size Spectrum Using Mercury Porosimetry and Nitrogen Adsorption Experiment: A Case Study from the Longtan Formation Shale, Southeastern Hunan, China." Advanced Materials Research 962-965 (June 2014): 34–40. http://dx.doi.org/10.4028/www.scientific.net/amr.962-965.34.

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Gas shales have a complex pore structure. Using mercury porosimetry and nitrogen adsorption experiment on shale of Longtan Formation in southeastern of Hunan, the pore structure characteristics were contrast analyzed, influencing factors and its impact on reservoir-forming were discussed. Longtan Formation shale is composed of nanopores, include the cylinder pores with two ends open and parallel-plate pores with four sides open. The efficiency of mercury ejection ranges 31.45%~63.82%, 51.94% on average, pores uniformity is well. The size of nanopores is 5~30nm, taking up 94.74% of the total volume and 98.08% of specific surface area. Brittle minerals content is high, as an important parameter influencing pore development. The nanopores have a strong ability to absorb gas, methane molecule exist in a structured way.

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20

Griffiths, Shane P., Mitchell T. Zischke, Tonya van der Velde, and Gary C. Fry. "Reproductive biology and estimates of length and age at maturity of longtail tuna (Thunnus tonggol) in Australian waters based on histological assessment." Marine and Freshwater Research 70, no. 10 (2019): 1419. http://dx.doi.org/10.1071/mf18469.

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The annual global catch of longtail tuna (Thunnus tonggol) has almost tripled in the past 20 years. In the Indian Ocean tuna fishery, longtail tuna catches now exceed those of some principle target species (e.g. bigeye and albacore tuna), resulting in numerous stock assessments concluding the species has been subject to overfishing and overfished for several years. Stock assessment is currently hindered by unreliable biological and catch data, which provided the impetus to study and describe the reproductive dynamics of longtail tuna in Australian waters using histology. Mean (95% confidence interval) length and age at 50% maturity were 535mm (463–570mm) and 2.51 years (2.14–2.79 years). Spawning occurred between October and February, when females produced a mean (±s.d.) of 1516680±743980 oocytes per spawning. Three spawning locations were confirmed based on the presence of postovulatory follicles in a small number of ovaries, although major spawning areas may be located offshore. The present study provides reliable maturity and fecundity ogives that may improve future assessment of longtail tuna stocks throughout the Indo-Pacific region.

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21

Wu, Chen Ting, and Shenglin Elijah Chang. "Social Designing Edible Community Networks: Longtan, Taoyuan, Taiwan." Environment-Behaviour Proceedings Journal 3, no. 7 (March 2, 2018): 103. http://dx.doi.org/10.21834/e-bpj.v3i7.1283.

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Based on action research methods in between peri-urban and rural communities of Longtan region in Taoyuan Taiwan, the object of our paper is to investigate how to reconnect lives and landscapes to revitalize small towns and shrinking rural villages by cultivating edible community networks. We define edible community networks as social designing local food to connect three major domains: autonomous processes, environmental friendly economies, and cross-cultural landscape identities. The findings of our research suggest that food imbody social relationships as well as economic connections. Rural revitalizations could be established via integrating food connections among urban consumers, farmers, and community groups.

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22

Couture, Ariane. "Portrait de Michel Longtin." Circuit: Musiques contemporaines 14, no. 2 (2004): 83. http://dx.doi.org/10.7202/902317ar.

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23

Girouard, Olivier. "Portrait de Michel Longtin." Circuit: Musiques contemporaines 14, no. 2 (2004): 93. http://dx.doi.org/10.7202/902318ar.

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Delbecque, Yannick. "Portrait de Michel Longtin." Circuit: Musiques contemporaines 14, no. 2 (2004): 113. http://dx.doi.org/10.7202/902319ar.

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25

Yin, Can Bin, and Fang Yu. "Calculation of Shrinkage-Creep Analysis for Long-Span Concrete Continuous Rigid Frame Bridge." Applied Mechanics and Materials 71-78 (July 2011): 1511–15. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.1511.

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Take Longtan river super large bridge as example,establishing finite element model with Bridge Doctor to analysis the influence shrinkage and creep.The deformation prediction of the bridge in the construction process and after completion was made based onseveral.Each prediction results were analyzed and compared.

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26

QIN, DAO-ZHENG, and YA-LIN ZHANG. "A new species of Longtania Ding from China and redescription of the male genitalia of Platytibia ferruginea Ding (Hemiptera: Fulgoromorpha: Delphacidae)." Zootaxa 1979, no. 1 (January 14, 2009): 62–68. http://dx.doi.org/10.11646/zootaxa.1979.1.6.

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A new species of the planthopper genus Longtania Ding (Hemiptera: Fulgoromorpha: Delphacidae), L. arcuata n. sp. (central southern China: Hubei) is described and illustrated. A revised diagnosis of Longtania and a key to known species is provided. The genus is tentatively placed in the subtribe Delphacina. The genus Platytibia is reviewed and is assigned to the subtribe Numatina sensu Emeljanov. The male genitalia of the type species, P. ferruginea Ding is redescribed and illustrated.

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27

Griffiths, Shane P., Gary C. Fry, Fiona J. Manson, and Dong C. Lou. "Age and growth of longtail tuna (Thunnus tonggol) in tropical and temperate waters of the central Indo-Pacific." ICES Journal of Marine Science 67, no. 1 (August 30, 2009): 125–34. http://dx.doi.org/10.1093/icesjms/fsp223.

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Abstract Griffiths, S. P., Fry, G. C., Manson, F. J., and Lou, D. C. 2010. Age and growth of longtail tuna (Thunnus tonggol) in tropical and temperate waters of the central Indo-Pacific. – ICES Journal of Marine Science, 67: 125–134. Age and growth of longtail tuna (Thunnus tonggol) were assessed by examination of annual growth increments in sectioned sagittal otoliths from 461 fish (238–1250 mm fork length, LF) sampled from tropical and temperate waters in the central Indo-Pacific between February 2003 and April 2005. Edge and microincrement analyses (presumed daily increments) suggest that longtail tuna deposit a single annual growth increment mainly between August and October. Age was, therefore, estimated for all fish by counting assumed annual growth increments. Ages ranged from 154 d to 18.7 years, with most fish being 3–9 years. Five growth models were fitted to length-at-age data, all of which indicated that the species is relatively slow-growing and long-lived. Recaptures of two tagged fish at liberty for 6.2 and 10.5 years support this notion. A bias-corrected form of Akaike's Information Criterion determined that the Schnute–Richards model provided the best fit to length-at-age data, with model parameter estimates (sexes combined) of L∞ = 135.4 cm LF, K = 22.3 year−1, t0 = 0.120 years, δ = 150.0, v = 0.019, and γ = 2.7 × 10−8. There was no significant difference in growth between sexes. The results suggest that longtail tuna grow more slowly and live longer than other tuna species of similar size. Coupled with their restricted neritic distribution, longtail tuna may be vulnerable to overexploitation by fisheries, and caution needs to be exercised in managing the species until more reliable biological and catch data are collected to assess the status of the population.

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Norita, Norita, Mala Nurilmala, and Asadatun Abdullah. "Quality of Longtail Tuna (Thunnus tonggol) in Different Storage Conditions." Jurnal Pengolahan Hasil Perikanan Indonesia 22, no. 3 (December 31, 2019): 490–97. http://dx.doi.org/10.17844/jphpi.v22i3.28947.

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Low temperatures could inhibit bacteria producing histamine during fish handling process. Longtail tuna (Thunnus tonggol) is kept in ice starting from catching process until delivering to retail market to maintain quality of fish. However, long period of this storage causes growth of bacteria and deformation of histidine into histamine. This study was aimed to determine the effect of different storage conditions to the quality of longtail tuna through sensory and histamine test. Samples of longtail tuna were kept for 18 days in room temperature storage (28±2°C), cold temperature (0±3°C) and freezing temperature (-10±4°C). The quality of tuna was evaluated using Quality Index Method (QIM). The formation of histamine was analysed on day 0, 1, 2, 3, 4, 8, 14, 18 using spectrofluorometry method. Sensory acceptability limit at room temperature was one day, while cold storage reached 10 days with QIM score 11. Longtail tuna was spoiled on day 2 at room temperature with QIM score >12 and concentration of histamin at 1713.88 mg/kg. The results of histamine in frozen and cold storage on the 18th day were 59.99 mg/kg and 77.98 mg/kg, these results exceeded the FDA limit (50 mg/kg) but still below the limit of FAO (100 mg/kg).The best storage condition is frozen storage, maintaining sensory acceptability and preventing histamine formation.

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Huang, Yuqi, Peng Zhang, Jinchuan Zhang, Xuan Tang, Chengwei Liu, and Junwei Yang. "Fractal Characteristics of Pores in the Longtan Shales of Guizhou, Southwest China." Geofluids 2020 (November 21, 2020): 1–16. http://dx.doi.org/10.1155/2020/8834758.

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The pore structure of marine-continental transitional shales from the Longtan Formation in Guizhou, China, was investigated using fractal dimensions calculated by the FHH (Frenkel-Halsey-Hill) model based on low-temperature N2 adsorption data. Results show that the overall D 1 (fractal dimension under low relative pressure, P / P 0 ≤ 0.5 ) and D 2 (fractal dimension under high relative pressure, P / P 0 > 0.5 ) values of Longtan shales were relatively large, with average values of 2.7426 and 2.7838, respectively, indicating a strong adsorption and storage capacity and complex pore structure. The correlation analysis of fractal dimensions with specific surface area, average pore size, and maximum gas absorption volume indicates that D 1 can comprehensively characterize the adsorption and storage capacity of shales, while D 2 can effectively characterize the pore structure complexity. Further correlation among pore fractal dimension, shale organic geochemical parameters, and mineral composition parameters shows that there is a significant positive correlation between fractal dimensions and organic matter abundance as well as a complex correlation between fractal dimension and organic matter maturity. Fractal dimensions increase with an increase in clay mineral content and pyrite content but decrease with an increase in quartz content. Considering the actual geological evaluation and shale gas exploitation characteristics, a lower limit for D 1 and upper limit for D 2 should be set as evaluation criteria for favorable reservoirs. Combined with the shale gas-bearing property test results of Longtan shales in Guizhou, the favorable reservoir evaluation criteria are set as D 1 ≥ 2.60 and D 2 ≤ 2.85 . When D 1 is less than 2.60, the storage capacity of the shales is insufficient. When D 2 is greater than 2.85, the shale pore structure is too complicated, resulting in poor permeability and difficult exploitation.

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Xing, Song, María Martinón-Torres, José María Bermúdez de Castro, Yingqi Zhang, Xiaoxiao Fan, Longting Zheng, Wanbo Huang, and Wu Liu. "Middle Pleistocene Hominin Teeth from Longtan Cave, Hexian, China." PLoS ONE 9, no. 12 (December 31, 2014): e114265. http://dx.doi.org/10.1371/journal.pone.0114265.

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31

Hua, Wei, Zhangli Chen, Sihua Zheng, and Chunqing Yan. "Reservoir-induced seismicity in the Longtan reservoir, southwestern China." Journal of Seismology 17, no. 2 (November 15, 2012): 667–81. http://dx.doi.org/10.1007/s10950-012-9345-0.

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Tang, Xianglu, Wei Wu, Guanghai Zhong, Zhenxue Jiang, Shijie He, Xiaoxue Liu, Deyu Zhu, Zixin Xue, Yuru Zhou, and Jiajing Yang. "Characteristics and Origin of Methane Adsorption Capacity of Marine, Transitional, and Lacustrine Shales in Sichuan Basin, China." Geofluids 2021 (April 21, 2021): 1–12. http://dx.doi.org/10.1155/2021/6674815.

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Adsorbed gas is an important component of shale gas. The methane adsorption capacity of shale determines the composition of shale gas. In this study, the methane adsorption capacity of marine, transitional, and lacustrine shales in the Sichuan Basin was analyzed through its isothermal adsorption, mineral composition, water content, etc. The results show that the methane adsorption capacity of marine (Qiongzhusi Formation and Longmaxi Formation), transitional (Longtan Formation), and lacustrine (Xujiahe Formation and Ziliujing Formation) shales is significantly different. The Longtan Formation has the strongest methane adsorption capacity. This is primarily related to its high organic matter and organic matter type III content. The methane adsorption capacity of the lacustrine shale was the weakest. This is primarily related to the low thermal evolution degree and the high content of water-bearing clay minerals. Smectite has the highest methane adsorption capacity of the clay minerals, due to its crystal structure. The water content has a significant effect on methane adsorption largely because water molecules occupy the adsorption site. Additionally, the temperature and pressure in a specific range significantly affect methane adsorption capacity.

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Martin, Emily T., Mary P. Fairchok, and Janet A. Englund. "Reply to Longtin et al." Journal of Infectious Diseases 202, no. 10 (November 15, 2010): 1617–18. http://dx.doi.org/10.1086/656789.

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An, Jian Feng, Xiao Ya Fan, Jun Zhang, and Hai Feng Yi. "Performance Evaluation of a Massively Parallel Decoder for CISC Microprocessors." Applied Mechanics and Materials 65 (June 2011): 590–94. http://dx.doi.org/10.4028/www.scientific.net/amm.65.590.

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Performance of the decoder unit is critical for CISC microprocessors. To take x86 ISA for an example, we analyzes the x86 instruction formats in detail. We compare two decoding strategies used in Longteng C1&C2 microprocessors: One is a simply direct serial decoder; another is a massively parallel decoder. Simulation results show speedups around 2.2~3.6 are obtained by using 10 parallel sub-decoders.

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Li, Bo, Zhijun Zhang, Yan Liu, and Shengmei Yang. "Evaluation Standard for Safety Coefficient of Roller Compacted Concrete Dam Based on Finite Element Method." Mathematical Problems in Engineering 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/601418.

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The lack of evaluation standard for safety coefficient based on finite element method (FEM) limits the wide application of FEM in roller compacted concrete dam (RCCD). In this paper, the strength reserve factor (SRF) method is adopted to simulate gradual failure and possible unstable modes of RCCD system. The entropy theory and catastrophe theory are used to obtain the ultimate bearing resistance and failure criterion of the RCCD. The most dangerous sliding plane for RCCD failure is found using the Latin hypercube sampling (LHS) and auxiliary analysis of partial least squares regression (PLSR). Finally a method for determining the evaluation standard of RCCD safety coefficient based on FEM is put forward using least squares support vector machines (LSSVM) and particle swarm optimization (PSO). The proposed method is applied to safety coefficient analysis of the Longtan RCCD in China. The calculation shows that RCCD failure is closely related to RCCD interface strength, and the Longtan RCCD is safe in the design condition. Considering RCCD failure characteristic and combining the advantages of several excellent algorithms, the proposed method determines the evaluation standard for safety coefficient of RCCD based on FEM for the first time and can be popularized to any RCCD.

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Zhang, Yan, Yi-qiang Peng, Wei Wang, Jian Gu, Xiao-jing Wu, and Xue-jun Feng. "Air emission inventory of container ports’ cargo handling equipment with activity-based “bottom-up” method." Advances in Mechanical Engineering 9, no. 7 (July 2017): 168781401771138. http://dx.doi.org/10.1177/1687814017711389.

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With the rapid development of China’s container port industry, the emissions of air pollutants in port areas have been increasing. Cargo handling equipment as a non-road mobile source of emissions has become a focus of public attention. This article adopted a full activity-based “bottom-up” method to establish the inventory of emissions by cargo handling equipment at a container port. Drawing on the OFFROAD model, we conducted investigation and analysis of cargo handling equipment holdings, activity levels, and equipment-related parameters and modified the emission factors. The Nanjing Longtan Container Port was taken as a case study. Results show that in 2014, emissions by cargo handling equipment of the Nanjing Longtan Container Port were as follows: PM10 4.25 t, PM2.5 3.91 t, NOx 82.98 t, SOx 1.06 t, CO 23.84 t, and HC 16.39 t, all lower than results from an earlier research based on 2013 fuel consumption data. Cargo handling equipment produced more PM and HC emissions than any other emission source at the port. The method and main conclusions of this article provide support for future work on energy conservation and emission reduction in port areas.

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Zhou, Qi, Jing Zhang, Yong Niu, and Jianjian Wang. "Environmental Risk Assessment and Regulatory Rating of Water Sources along the Yangtze River’s Nanjing Section under the Influence of Multiple Risk Sources." Sustainability 13, no. 3 (February 1, 2021): 1484. http://dx.doi.org/10.3390/su13031484.

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To complement the current studies of risk assessment on water sources which seldom consider the distribution effects of multiple risk sources concentration, and improve the efficiency of water source supervision, this study establishes a method system for risk assessment of water sources and regulatory rating evaluation under the distribution effects of multiple risk sources concentration. The method system includes: (1) utilizing the single-risk source impact index to characterize the risk impact degree of the single-risk source on the water source, the index calculation method of single-risk source impact considers the risk degree and the distribution location of risk source; (2) using the multiple risk sources impact index to characterize the risk impact degree of the multiple risk sources on the water source, the index calculation method of multiple risk sources considers the impact index of single-risk source, the number of risk sources, and the distribution concentration of multiple risk sources; (3) the environmental risk assessment and regulatory rating evaluation method consider multiple risk sources impact index, anti-risk ability of water source, and the importance of water source. This method system has been applied to the environmental risk assessment and regulatory rating of eight water sources along the Nanjing Yangtze River, with excellent achievements. As the results reveal, eight water sources suffer 437 risk impacts from 175 risk sources, 69.04% of which are low-risk impacts and 13 are high-risk impacts. Longtan water source suffers the most risk impacts of 86, among which eight are high-risk impacts. The impacts of multiply-risk sources on the eight water sources are high-risk impacts. The impact index of multiple risk sources increases from the upstream water sources to the downstream water sources, reaching the maximum value of 5.267 at the most downstream Longtan water source. Though the environmental risk and supervision rating of Longtan water source is high, those of other water sources are rated as medium.

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Fu, Shaojun, and Shenhong Chen. "Feedback analysis of the intake slope of Longtan Hydropower project." International Journal of Rock Mechanics and Mining Sciences 41 (May 2004): 798–803. http://dx.doi.org/10.1016/j.ijrmms.2004.03.138.

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Fu, De Cheng, Yu Hui Wen, and Lei Wang. "Static and Dynamic Testing Study on Mechanical Behavior of Longtan Bridge." Applied Mechanics and Materials 684 (October 2014): 100–104. http://dx.doi.org/10.4028/www.scientific.net/amm.684.100.

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To assess the carrying capacity and reliability of the-Longtan Bridge, applied static load in the middle of the bridge step by step, then collected strain and deflection data of the beam. In order to understand the working principle of a bridge under dynamic loads, dynamic load test - Vehicle traffic test and fluctuation test t was performed, and vibration frequency data was collected. This paper described the basic principles of the bridge static and dynamic tests, and introduced the program of the experiment. Based on the test data, the static and dynamic mechanism of the bridge was discussed, the conclusion provides the basis for further study of bridge mechanism of the mechanical.

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Liu, H. M., Z. W. Lian, and X. J. Ye. "Heat-storage characteristics of LongTan hydroelectric station’s building enclosure in China." Applied Thermal Engineering 23, no. 18 (December 2003): 2399–405. http://dx.doi.org/10.1016/s1359-4311(03)00206-0.

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Shaojun, Fu, and Chen Shenhong. "Feedback analysis of the intake slope of longtan hydropower project, China." International Journal of Rock Mechanics and Mining Sciences 41, no. 3 (April 2004): 518. http://dx.doi.org/10.1016/j.ijrmms.2003.12.097.

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He, Qing, Yanfei An, Fangji Sun, and Chunkit Lai. "Genesis of Pyrite Concretions: Constraints from Mineral and Geochemical Features of Longtan Formation in Anhui Province, Eastern China." Minerals 9, no. 8 (July 30, 2019): 467. http://dx.doi.org/10.3390/min9080467.

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The occurrence of pyrite concretions in the Permian Longtan Formation sheds light on the paragenesis, formation conditions and regional paleoenvironment. We analyzed the mineral and geochemical characteristics of pyrite concretions using scanning electron microscopy-energy dispersive spectrometer (SEM-EDS), X-ray diffraction (XRD) and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) from the Longtan Formation shales in Anhui, Eastern China. These pyrite concretions consist of two types, each with a distinct nucleus and outer layer: The former is mainly made up of quartz, bivalve fragments and minor gypsum, ankerite, siderite and pyrite, the latter consists of pyrite (FeS2) in the voids of quartz. Based on the correlation matrix and geochemical/mineralogical affinity, trace elements in the pyrite concretions fall into three groups, that is, I (Sr, Ba, Rb and K) in calcic minerals from bivalve-bearing nucleus, II (Nb, Ta, Zr and Hf) in certain heavy minerals and III (V, Cr, Co and Ni) in pyrites. Mineral assemblage and paragenetic analysis show that the formation of pyrite concretions can be divided into three stages: (1) deposition of bivalve-bearing nucleus, (2) lithification of diatoms and (3) diagenesis of pyrite. Mineral and geochemical indicators suggest that the formation environment of pyrite concretions has undergone a major shift from lagoon with intense evaporation, to strong reducing marsh.

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Al-Mamari, Dawood, Lubna Al-Kharusi, Fatma Al-Kiyumi, Saeed Al-Shogebai, Ibrahim Al-Anboori, Rashed Al-Seneadi, and Sergiy Khrorv. "Record of the largest longtail tuna, Thunnus tonggol (Bleeker 1851) from off shore Salalah in the Sultanate of Oman." Journal of Fisheries 2, no. 3 (December 31, 2014): 215. http://dx.doi.org/10.17017/jfish.v2i3.2014.57.

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Capture of a great Longtail tuna, Thunnus tonggol from off Shore of the city of Salalah, Arabian Sea, Sultanate of Oman in January 2013 is described in this paper. Its morphometric and meristic characters are discussed.

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Chen, Yu Lin, Qing Wang, Cong Cong Liu, and Jian Xin Ge. "Numerical Simulation of the Flow Characteristics of 35t/h Internally Circulating Fluidized Bed." Applied Mechanics and Materials 529 (June 2014): 272–76. http://dx.doi.org/10.4028/www.scientific.net/amm.529.272.

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The gas-solid flow characteristics of the 35t/h oil shale-combustion circulating fluidized bed boiler (Developed by Wangqing Longteng Energy Development Co., Ltd) was simulated using Eulerian-Eulerian model (EEM), which was based on the kinetic theory of granular. The distribution of particle volume fraction and the distribution of particle velocity revealed the mechanism of the internal recirculation flow of particles in the furnace. The simulation results provided a reference for the flow structure optimization of the inner circulating fluidized bed and the enlargement of the inner circulating fluidized bed boiler.

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Li, Dang Sheng, and Xi Liang Chen. "The Study of Ammonia-Nitrogen and COD Removing Performance of Ferrate (VI)." Advanced Materials Research 781-784 (September 2013): 2349–52. http://dx.doi.org/10.4028/www.scientific.net/amr.781-784.2349.

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This paper presents a comparative study of the performance of ferrate (VI) towards wastewater treatment. The ferrate was produced by microwave irradiation-assisted hypochlorite-oxidation method. And the concentration of the prepared ferrate was determined by UV-Vis spectrum. Domestic wastewater collected from Longting lake of Kaifeng city was treated with ferrate (VI). Samples were analyzed for COD and ammonia-nitrogen removal. Results demonstrated that low addition of ferrate (VI) leads to good removal of COD and ammonia nitrogen. So ferrate (VI) is an effective reagent for wastewater treatment.

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Wang, Jie Jun, Ke Ke Yang, and Can Bin Yin. "Temperature Field Test and Research of Box-Pier and Box-Girder for Long Span Continuous Rigid Frame Bridge." Applied Mechanics and Materials 90-93 (September 2011): 969–74. http://dx.doi.org/10.4028/www.scientific.net/amm.90-93.969.

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Longtan River Bridge, which the length of the main span is 200m and the height of the main pier is 178m, is a long span continuous rigid frame bridge. Temperature field of the box-pier and the box-girder due to solar radiation were measured. Regression analysis of the temperature difference has been done by using the least square method, and the fitting curve of the vertical and the transverse non-linear temperature difference distribution of box-pier and box-girder are obtained in this paper

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Söderström, Lars. "A tribute to Dr Royce E. Longton." Journal of Bryology 27, no. 3 (September 2005): 193–94. http://dx.doi.org/10.1179/174328205x69331.

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Wang, Zhi Qiang, Ke Hong Zheng, and Xiao Bin Wu. "Compressive Resistance Reliability Analysis of Gravity Dam Based on Elastic Stochastic Finite Element." Advanced Materials Research 926-930 (May 2014): 537–40. http://dx.doi.org/10.4028/www.scientific.net/amr.926-930.537.

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When calculating compressive resistance reliability of gravity dam using the elasticity stochastic finite element method, as a result of stress singularity of dam toe, elements near the dam toe has been encrypted to different mesh size, find a point along the foundation plane that its compressive resistance reliability index is not sensitive to mesh and it is nearest to the dam toe, select the compressive resistance reliability index of the point as the compressive resistance reliability index of gravity dam. Take Longtan RCC gravity dam as an example and give the analysis results.

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Yin, Can Bin, and Fang Yu. "Seismic Response Analysis of High Pier and Long Span Rigid Framed Bridge under Non Uniform Excitation." Applied Mechanics and Materials 193-194 (August 2012): 1315–19. http://dx.doi.org/10.4028/www.scientific.net/amm.193-194.1315.

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Taking the Longtan River Bridge as the engineering background , the seismic response analysis of high-pier and long-span continuous rigid-framed bridge considering travelling wave effect is simulated by means of the great mass method . Conclusions are drawn under asynchronous and synchronous excitation respectively , between which comparison indicates that the seismic responses for the main beams of continuous rigid-framed bridge are decreased at various degrees , such as the longitudinal horizontal displacement . The travelling wave effects on the piers are also related to the characteristics and locations of the bridge piers and so on .

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Rahman, Mustafizur M., Siti Hajar, and Kamaruzzaman B. Yunus. "Comparative analysis of chemical composition of some commercially important fishes with an emphasis on various Malaysian diets." Open Chemistry 18, no. 1 (October 20, 2020): 1323–33. http://dx.doi.org/10.1515/chem-2020-0152.

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AbstractThis study compares the chemical composition of cockle (Anadara granosa) and some commercially important marine (Asian seabass Lates calcarifer, grouper Epinephelus bleekeri, hardtail scad Megalaspis cordyla, longtail tuna Thunnus tonggol and Indian mackerel Rastrelliger kanagurta) and freshwater (sutchi catfish Pangasius hypophthalmus, Nile tilapia Oreochromis niloticus and eel Monopterus albus) fishes in Peninsular Malaysia. The results show that the proximate composition and trace metal content were significantly different (P < 0.05) among species investigated. The mean protein content was the highest in eel (19.1%) and the lowest in sutchi catfish (13.0%) and cockle (13.0%). The mean lipid content of Indian mackerel (3.9%) was higher than cockle (2.0%), followed by eel (1.3%) and longtail tuna (0.8%). The mean ash content was the highest in Indian mackerel (1.4%) and the lowest in cockle (0.9%). Zinc and manganese contents in cockle (Zn: 61.2 mg kg−1, Mn: 22.7 mg kg−1) were very high compared to other species investigated. The copper content was minimum in sutchi catfish (1.0 mg kg−1) and a maximum in the hardtail scad (11.7 mg kg−1). Trace metal content in sutchi catfish, Nile tilapia, grouper, longtail tuna, eel and cockle followed an order Zn > Mn > Cu, whereas Asian seabass, hardtail scad and Indian mackerel followed a different order Zn > Cu > Mn. Trace metal content in the tissue of the fishes examined was within safe limits for human consumption except Mn content in the cockle and Cu content in the hardtail scad, which is a matter of concern. When considering the daily fish fat, mineral and trace metal intake, marine fishes and shellfish are better than freshwater fishes.

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