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A novel strategy for gas mitigation during swine manure odour treatment using seaweed and a microbial consortium

Frontiers of Environmental Science & Engineering 2020年第3期14卷 203-214页

作者： Madhavaraj Lavanya Ho-Dong Lim kong-min kim Dae-Hyuk kim Balasubramani Ravindran Gui Hwan Han Center for Industrialization of Agricultural and Livestock Microorganisms(CIALM) Jeongeup-si 56212Republic of Korea Department of Molecular Biology Institute for Molecular Biology and GeneticsJeonbuk National UniversityJeonju 561-756Republic of Korea Department of Environmental Energy&Engineering Kyonggi UniversitySuwon-si 16227Republic of Korea

Gas emissions from swine farms have an impact on air quality in the Republic of *** manure stored in deep pits for a long time is a major source of harmful gas ***,we evaluated the mitigation of emissions of ammonia(N H 3),hydrogen sulfide(H2S)and amine gases from swine manure with biological products such as seaweed(Sargassum homeri)and a microbial consortium(Bacillus subtilis(1.2×10^9 CFU/mL),Thiobacillus sp.(1.0×10^10 CFU/mL)and Saccharomyces cerevisiae(2.0×10^9 CFU/mL))used as additives due to their promising benefits for nutrient ***,seaweed powder masking over two days provided notable control of over 98%-100%of the gas ***,significant control of gas emissions was especially pronounced when seaweed powder masking along with a microbial consortium was applied,resulting in a gas reduction rate of 100%for NH 3,amines and H2S over 10 days of *** results also suggested that seaweed powder masking and a microbial consortium used in combination to reduce the gas emissions from swine manure reduced odour compared with that observed when the two additives were used *** the consortium,seaweed decreased total volatile fatty acid(VFA)*** proposed novel method of masking with a microbial consortium is promising for mitigating hazardous gases,simple,and environmentally *** research is warranted to determine the mechanisms underlying the seaweed and substrate interactions.

关键词： Seaweed Consortium Mitigation Ammonia H2S Volatile fatty acids(VFAs)

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Optimization of an Artificial Intelligence Database and Camera Installation for Recognition of Risky Passenger Behavior in Railway Vehicles

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Computers, Materials & Continua 2025年第1期82卷 1277-1293页

作者： min-kyeong kim Yeong Geol Lee Won-Hee Park Su-hwan Yun Tae-Soon Kwon Duckhee Lee Railroad Test&Certification Division Korea Railroad Research Institute(KRRI)Cheoldo BangmulgwanroUiwang-si16105Republic of Korea Railroad Safety Division Korea Railroad Research Institute(KRRI)Cheoldo BangmulgwanroUiwang-si16105Republic of Korea

Urban railways are vital means of public transportation in *** than 30%of metropolitan residents use the railways,and this proportion is expected to *** enhance safety,the government has mandated the installation of closed-circuit televisions in all carriages by ***,cameras still monitored *** address this limitation,we developed a dataset of risk factors and a smart detection system that enables an immediate response to any abnormal behavior and intensive monitoring *** created an innovative learning dataset that takes into account seven unique risk factors specific to Korean railway *** data collection was conducted across the Shinbundang Line of the Incheon Transportation Corporation,and the Ui-Shinseol *** observed several behavioral characteristics and assigned unique annotations to *** also considered carriage *** performance was evaluated by camera placement and *** the camera installation plan was *** dataset will find immediate applications in domestic railway *** artificial intelligence algorithms will be verified shortly.

关键词： AI railway vehicle risk factor smart detection AI training data

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Effect of pile-cap connection on behavior of torsionally loaded pile groups

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第3期9卷 303-312页

作者： Ling-gang kong Li-min ZHANG Key Laboratory of Soft Soils and Geoenvironmental Engineering Ministry of Education Zhejiang University Hangzhou 310027 China Department of Civil Engineering The Hong Kong University of Science and Technology Hong Kong China

To evaluate the responses of fixed and pinned pile groups under torsion, a method is presented to analyze the nonlinear behavior of free-standing pile groups with rigid pile caps. The method is capable of simulating the nonlinear soil response in the near field usingp-y and r-θ curves, the far-field interactions through mindlin＇s and Randolph＇s elastic solutions, and the coupling effect of lateral resistance on torsional resistance of the individual piles using an empirical factor. Based on comparisons of the solutions for fixed- and pinned-head, 1×2, 2×2, and 3×3 pile groups subjected to torsion, it was found that pile-cap connection significantly influences the torsional capacity of pile groups and the assignment of applied torques in the pile groups. In this study, the applied torques for the pinned-head pile groups are only 44%-64% of those for the corresponding fixed-head pile groups at a twist angle of 2^o. Such a difference is mainly due to the change of the lateral resistances of individual piles in the groups.

关键词： Pile group Pile foundations Torsional response Pile-cap connection Nonlinear analysis

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Microstructure and mechanical property of Sn–Ag–Cu solder material

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Rare Metals 2017年第3期36卷 193-197页

作者： Yi-Gang kong Zhi-Gang kong Feng-min Shi School of Mechanical Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China Research Laboratory of Electrical Contacts Beijing University of Posts and TelecommunicationsBeijing 100876China Technology Department Jinan No.10 Radio Factory Co.Ltd.Jinan 250100China

Among the lead-free solder materials,Sn-Ag-Cu alloys have many advantages,such as good wetting property,superior interfacial properties and high creep *** this article,the organization and welding performance of Sn-Ag-Cu material were *** surface morphology of the two alloys was observed by stereoscopic microscope and scanning electron microscope （SEM）.Chemical constitution was examined by X-ray energy-dispersive spectroscopy （EDS）.The mechanical properties of Sn-Ag-Cu solder were evaluated systematically compared with those of Sn-Cu *** results show that Sn-Ag-Cu solder based on different solder pads has different welding *** thickness of intermetallic compound （IMC） at the interface increases with aging *** the gold-plated pads,there are a large number of IMC graphic,and in the welding interface,it can reduce the reliability of electrical *** Sn-Ag-Cu solder joints show a superior mechanical property over the traditional Sn-Cu *** number of dimples decreases and that of cavities increases for Sn-Cu0.7 alloy and the fracture surfaces of Sn-Ag3.0-Cu0.5 alloy have many small size dimples which are homogeneously distributed.

关键词： Lead-free solder Organization Weldingperformance Intermetallic compound

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Effect of operating conditions on the performance of riser reactor for oxidative coupling of methane Author links open overlay panel

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Particuology 2024年第8期91卷 235-248页

作者： min Cai Shuangzhu kong Mengxi Liu Chunxi Lu State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing102249China

Oxidative coupling of methane(OCM)is characterized by high temperature and strong heat released.A riser reactor is designed for the OCM process to improve gas-solid contacting and heat *** work illustrates the effect of hydrodynamic conditions and feed gas composition on the performance of an OCM riser *** findings suggest that oxidative reactions predominantly occur within the acceleration zone and developed flow ***,at the low superficial gas velocity accompanied by a high solid circulating rate,the C_(2)yield initially increases in the acceleration zone,followed by a decrease in the developed flow zone and deceleration *** optimal operating conditions are a specific region corresponding to the solids holdup ranges from 0.015 to ***,the C_(2)yield can be elevated using an appropriate feed mixture.

关键词： Oxidative coupling of methane Riser Hydrodynamics Solids holdup

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Effects of Cover Sheets on the Nugget Growth and Fracture Behavior of Resistance Spot Welded Q&P980 Steel Joints

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Chinese Journal of Mechanical Engineering 2022年第4期35卷 360-373页

作者： Zhanxiang Ling Ting Chen Liang kong min Wang Shanghai Key Laboratory of Materials Laser Processing and Modifcation Shanghai Jiao Tong UniversityShanghai 200240China

The resistance spot weldability of galvanized ultra-high-strength steels is not satisfed,the joints are prone to interfacial fracture and the weldable current range is *** solve the problems,a novel method called resistance spot welding with double-sided cover sheets was introduced to weld a galvanized Q&P980 steel with the thickness of 1.2 *** thin SPCC mild steel sheets were chosen as cover sheets and were placed symmetrically at both sides between the Q&P980 steels and the electrodes,then the RSW process was carried *** with the traditional RSW method,the joints obtained by using the novel method achieved larger tensile shear strength and energy absorption,which increased by 26.9%and 52.6%,*** increasing the welding current,the failure mode transferred from interfacial fracture to nugget pull-out fracture or base metal tearing *** contrast,the joints always showed interfacial fracture without cover *** improvement of the joint performance was mainly attributed to the enlargement of the *** the help of fnite element simulation,it was found that the cover sheets helped increase the contact area and reduced the current density during welding,which postponed the expulsion,and a larger area could be evenly *** application of the novel method can be easily extended to the resistance spot welding of other ultra-high-strength steels with various thicknesses.

关键词： Resistance spot welding Q&P980 steel Cover sheet Mechanical property

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Coordinate registration algorithms for over-the-horizon radar

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Journal of Systems Engineering and Electronics 2006年第4期17卷 725-730页

作者： kong min Wang Cruohong Wang Yongcheng Research Inst. of Information Fusion Naval Aeronautical Engineering Inst. Yantai 264001 P. R. China The 14th Inst. of China Electronics & Technology Cooperation Nanjing 210013 P. R. China

Different from the other conventional radars, the over the horizon radar （OTHR） faces complicated nonlinear coordinate transform due to electromagnetic wave propagation and reflection in ionospheres. A significant problem is the phenomenon of multi-path propagation. Considering it, the coordinate registration algorithms of planar measurement model and spherical measurement model are respectively derived in detail. Noticeably, a new transforming expression of apparent azimuth and an integrated form of transforming expressions from measurement vector to ground state vector in coordinate registration algorithm of spherical measurement model are proposed. And then simulations are made to verify the correctness of the proposed algorithms and expression. Besides this, the transforming error rate of slant range, Doppler and apparent azimuth of the two kinds of models are given respectively. Then the quantitative analysis of error rate is also given. It can be drawn a conclusion that the coordinate registration algorithms of planar measurement model and spherical measurement model are both correct.

关键词： over-the-horizon radar coordinate registration error rate

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Star-Forming Galaxies at z～2 in the Hubble Ultra Deep Field

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Chinese Journal of Astronomy and Astrophysics 2008年第1期8卷 1-11页

作者： Xu kong Wei Zhang min Wang Center for Astrophysics University of Science and Technology of China Hefei 230026 Joint Institute for Galaxy and Cosmology （JOINGC） of SHAO and USTC National Astronomical Observatories Chinese Academy of Sciences Beijing 100012

Using a simple color selection based on B-, z- and K-band photometry, BzK =（z - K）AB - （B - Z）AB 〉 -0.2, we picked out 52 star-forming galaxies at 1.4 ≤z ≤ 2.5 （sBzKs） from a K-band selected sample （Kvega 〈 22.0） in an area of - 5.5 arcmin^2 of the Hubble Ultra Deep Field （UDF）. We develop a new photometric redshift method, and the error in our photometric redshifts is less than 0.02（1 ＋ z）. From the photometric redshift distribution, we find the BzK color criterion can be used to select star-forming galaxies at 1.4≤ z ≤ 2.5 with Kvega 〈 22.0. Down to Kvega 〈 22.0, the number counts of sBzKs increase linearly with the K magnitude; the sBzKs are strongly clustered, and most of them have irregular morphologies on the ACS images. They have a median reddening of E（B - V） - 0.28, an average star formation rate of - 36 M⊙ yr^-1 and a typical stellar mass of - 10^10 M⊙. The UV criterion for the galaxies at z - 2 can select most of the faint sBzKs in the UDF, but it does not work well for bright, massive, highly-reddened, actively star-forming galaxies.

关键词： galaxies evolution -galaxies high-redshift - galaxies photometry - cosmology observations

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Oil geochemistry derived from the Qinjiatun–Qikeshu oilfields:insight from light hydrocarbons

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Acta Geochimica 2018年第3期37卷 433-440页

作者： Jin Li Ting kong min Zhang Key Laboratory of Exploration Technology for Oil and Gas Research (Yangtze University) Ministry of Education College of Resources and Environment Yangtze University Research Institute of Petroleum Exploration and Development (Langfang Branch) PetroChina The Key Laboratory of Gas Formation and Development Petrochina

A suite of 27 oils from the Qinjiatun–Qikeshu oilfields in the Lishu Fault Depression of the Songliao Basin was analyzed using whole oil gas *** combination with the relative distribution of C27, C28,and C29 regular steranes, detailed geochemical analyses of light hydrocarbons in oil samples revealed crude oils characterized by the dual input of lower aquatic organisms and higher terrestrial plants. Several light hydrocarbon indicators suggest that the liquid hydrocarbons have maturities equivalent to vitrinite reflectances of around0.78%–0.93%. This is consistent with the maturity determination of steranes C2920 S/(20 S ? 20 R) and C29 aab/(aaa ? abb). Crude oils derived from the two distinct oilfields likely both have source rocks deposited in a lacustrine environment based on light hydrocarbon parameters and on higher molecular weight hydrocarbon parameters. The results show that light hydrocarbon data in crude oils can provide important information for understanding the geochemical characteristics of the Qinjiatun–Qikeshu oils during geologic evolution.

关键词： Light hydrocarbons Crude oil Lishu FaultDepression Geochemistry characteristic

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Growth characteristics of algae during early stages of phytoplankton bloom in Lake Taihu,China

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Journal of Environmental Sciences 2013年第2期25卷 254-261页

作者： Yuhong Jia Johnson Dan min Zhang Fanxiang kong State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and LimnologyChinese Academy of Sciences Graduate School of Chinese Academy of Sciences Water and Environmental Science Building Department of GeographyUniversity of LethbridgeLethbridgeAlbertaT1K 3M4Canada

Three treatments, sediment plus lake water （S＋W）, sterilized sediment plus lake water （SS＋W）, and sediment plus filtered lake water （S＋FW）, were recruited to investigate the growth characteristics of algae during pre-bloom and the importance of algal inocula in the water column and sediment. The results showed that in the water column, biomass of all algae increased in all treatments when recruitment was initiated, whereas this tendency differed among treatments with further increment of temperature. The process of algal growth consisted of two stages： Stage I, the onset of recruitment and Stage II, the subsequent growth of algae. Compared with S＋W, in Stage I, SS＋W significantly increased the biomass of cyanophytes by 178.70%, and decreased the biomass of non-cyanophytes by 43.40%; In Stage II, SS＋W notably stimulated the growth of all algae, thus incurring the occurrence of phytoplankton bloom. Further analyses revealed that both metabolic activity and photochemical activity of algae were enhanced in SS＋W, which resulted from the releasing of nutrients from sediment. These results suggest that algal growth in Stage II and algal inocula in the water column can be important factors for the formation of phytoplankton bloom. In addition, possible mechanisms promoting algal recruitment and subsequent growth of algae were explored.

关键词： algae recruitment phytoplankton bloom water column sediment

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