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sedimentary characteristics.a.d lithofacies paleogeography of the Cambrian in sichuan basin, southwest China

Petroleum 2024年第2期10卷 224-242页

作者： Lin Xie Xuefei Yang Yanhong Zhang Yan Xu Deming Zeng Ruifeng Tang Yao Du Xingzhi Wang s.a.e Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum University school of Geoscience and Technology Southwest Petroleum University schlumberger China s.a. Res.a.ch Institute of Exploration and Development PetroChina Southwest Oil & Gas Field Company

Cambrian in sichuan basin developed thick black s.a.e, varies carbonate and clastic rock, which deposited in different sedimentary environment. sichuan basin in the upper Yangtze platform contained a record of environment during the Cambrian. Detail facies.a.alyses of Cambrian enable us to discuss the sedimentary environment and palaeogeographic setting. sedimentation commenced in the Early Cambrian with the deposition of shelf facies(Qiongzhusi Formation and Canglangpu Formation). At this s.a.e, thick s.a.e and clastic rock deposited in sichuan basin. At the end of the Early Cambrian, a carbonate platform developed in upper Yangtze platform, and sichuan basin was located in restricted platform(Longwangmiao Formation). In the Middle Cambrian, tidal flat and restricted platform developed in sichuan basin(Douposi Formation), because of continuous regression. During the Late Cambrian,sichuan basin was located in carbonate platform again(Xixiangchi Formation). There are three types of sedimentary system in the Cambrian of sichuan basin: clastic sedimentary system, clastics-carbonate mixed sedimentary system and carbonate sedimentary system. Vertically, the basin shows the evolutionary character of clastic-carbonate sedimentary systems. The three sedimentary systems correspond to three “transgression-regression” cycles of the Cambrian. The transgression in the initial period of the Early Cambrian led to the formation of clastic sedimentary system in the Qiongzhusi Formation of Lower Cambrian. The transgression in the later period of the Early Cambrian led to the formation of clasticcarbonate mixed sedimentary system in the Middle-Lower Cambrian. The transgression in the initial period of the Late Cambrian led to the formation of carbonate sedimentary system in the Xixiangchi Formation of Upper Cambrian. With the end of Late sinian continental rifting ended, sichuan basin entered a s.a.le evolutionary s.a.e of the craton basin, while the paleo-land developed in the north

关键词： sichuan basin Cambrian sedimentary characteristics Lithofacies paleogeography

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Prediction of net energy of feeds for broiler chickens

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Animal Nutrition 2024年第1期16卷 241-250页

作者： Aye-Cho Tay-Zar Manoosak Wongphatcharachai Pairat srichana Pierre-André Geraert Jean Noblet Charoen Pokphand Foods Public company Limited(CPF) BangkokThailand Adisseo France s.a.s. AntonyFrance INRAE RennesFrance

Net energy(NE)enables the prediction of more accurate feed energy values by taking into account the heat increment which is.a.proximately 25%of apparent metabolizable energy(AME)in ***,application of NE in poultry industry has not been practiced *** predict the NE values of broiler diets,23 diets were prepared by using 13 major ingredients(wheat,corn,paddy rice,broken rice,cas.a.a pellets,full-fat soybean,soybean meal,canola meal,animal protein,rice bran,wheat bran,palm kernel meal and palm kernel oil).The diets were formulated in order to meet the birds'requirements.a.d get a wide range of chemical compositions(on DM basis;33.6%to 55.3%for s.a.ch;20.8%to 28.4%for CP,2.7%to 10.6%for ether extract[EE]and 7.0%to 17.2%for NDF),with low correlations between these nutrients.a.d low correlations between the inclusion levels of ingredients.a.lowing for the calculation of robust prediction equations of energy values of diets or *** diets were fed to Ross 308 broilers raised in 12 open-circuit respiratory chambers from 18 to 23 d of age(4 birds per cage)and growth performance,diet AME content and heat production were measured,and dietary NE values were *** trial was conducted on a weekly basis with 12 diets measured each week(1per chamber),1 of the 23 diets(reference diet)being measured each *** diet was tested at least *** total,235 energy balance data values were available for the final *** performance,AME(15.3 MJ/kg DM on average)and AME/GE(79.4%on average)values were as *** NE/AME value averaged 76.6%and was negatively influenced by CP and NDF and positively by EE in connection with efficiencies of AME provided by CP,EE and s.a.ch for NE of 73%,87%and 81%,*** best prediction equation was:NE=(0.815×AME)—(0.026×CP)+(0.020×EE)—(0.024×NDF)with NE and AME as MJ/kg DM,and CP,EE and NDF as%of *** NE prediction equations from this study agree with other recently reported equation

关键词： Net energy Broiler Poultry Feed evaluation Energy system

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Modification of streamer-to-leader transition model based on radial thermal expansion in the sphere-plane gap discharge at high altitude

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Plas.a.science and Technology 2024年第1期26卷 42-49页

作者：耿江海林果王平丁玉剑丁杨俞华 Department of Electric Power Engineering North China Electric Power UniversityBaoding 071003People’s Republic of China China Electric Power Res.a.ch Institute Beijing 100192People’s Republic of China Xinjiang Electric Power company Res.a.ch Institute Urumchi 830000People’s Republic of China s.a.xi Electric Power company Res.a.ch Institute Taiyuan 030001People’s Republic of China

Historically,streamer-to-leader transition studies mainly focused on the rod-plane gap and low altitude analysis,with limited attention paid to the sphere-plane gap at high altitude *** this work,sphere-plane gap discharge tests were carried out under the gap dis.a.ce of 5 m at the Qinghai Ultra High Voltage(UHV)test base at an altitude of 2200 *** experiments measured the physical parameters such as the discharge current,electric field intensity and ins.a.taneous optical *** duration of the dark period and the critical charge of streamer-toleader transition were obtained at high *** on radial thermal expansion of the streamer stem,we es.a.lished a modified streamer-to-leader transition model of the sphere-plane gap discharge at high altitude,and calculated the stem temperature,stem radii and the duration of streamer-to-leader *** with the measured duration of sphere-plane electrode discharge at an altitude of 2200 m,the error rate of the modified model was 0.94%,while the classical model was 6.97%,demonstrating the effectiveness of the modified *** the comparisons.a.d analysis,several suggestions.a.e proposed to improve the numerical model for further quantitative investigations of the leader inception.

关键词： streamer-to-leader transition model high altitude streamer stem convective diffusion radial thermal expansion

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Re-evaluation of recent res.a.ch on metabolic utilization of energy in poultry: Recommendations for a net energy system for broilers

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Animal Nutrition 2024年第1期16卷 62-72页

作者： Jean Noblet Aye-Cho Tay-Zar shu-Biao Wu Pairat srichana Pierre Cozannet Pierre-Andre Geraert Mingan Choct INRAE Charoen Pokphand Foods Public company Limited (CPF) school of Environmental and Rural science University of New England Adisseo France s.a.s.

Different energy systems have been proposed for energy evaluation of feeds for domestic animals. The oldest and most commonly used systems take into account the fecal energy loss to obtain digestible energy(DE), and fecal, urinary and fermentation gases energy losses to calculate metabolizable energy(ME). In the case of ruminants.a.d pigs, the net energy(NE) system, which takes into account the heat increment associated with the metabolic utilization of ME, has progressively replaced the DE and ME systems over the last 50 years. For poultry, apparent ME(AME) is used exclusively and NE is not yet used widely. The present paper considers some important methodological points for measuring NE in poultry feeds.a.d summarizes the available knowledge on NE systems for poultry. NE prediction equations based on a common analysis of three recent studies representing a total of 50 complete and balanced diets fed to broilers.a.e proposed; these equations including the AME content and easily available chemical indicators have been validated on another set of 30 diets. The equations.a.e applicable to both ingredients.a.d complete diets. They rely primarily on an accurate and reliable AME value which then represents the first limiting predictor of NE value. Our analysis indicates that NE would be a better predictor of broiler performance than AME and that the hierarchy between feeds is dependent on the energy system with a higher energy value for fat and a lower energy value for protein in an NE system. Practical considerations for implementing such an NE system from the commonly used AME or AMEn(AME adjusted for zero nitrogen balance) systems.a.e presented. In conclusion, there is sufficient information to allow the implementation of the NE concept in order to improve the accuracy of feed formulation in poultry.

关键词： Poultry Feed evaluation Net energy Energy system

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Plas.a.nitrogen fixation system with dual-loop enhancement for improved energy efficiency and its efficacy for lettuce cultivation

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Plas.a.science and Technology 2024年第1期26卷 82-92页

作者：韩泽阳张梦雪张頔何欣井天军葛知轩李玉鸽朱童任云鸿仲崇山季方 College of Information and Electrical Engineering China Agricultural UniversityBeijing 100083People’s Republic of China College of Water Resources.a.d Civil Engineering China Agricultural UniversityBeijing 100083People’s Republic of China Electric Power Res.a.ch Institute s.a.e Grid Gansu Electric Power Company GansuLanzhou 730030People’s Republic of China

Plas.a.nitrogen fixation(PNF)has been emerging as.a.promising technology for greenhouse gasfree and renewable energy-based ***,most PNF studies seldom address practical application-specific *** this work,we present the development of a compact and automatic PNF system for on-site agricultural *** system utilized a gliding-arc discharge as the plas.a.source and employed a dual-loop design to generate NO_(x)from air and water under atmospheric *** results showed that the system with a dualloop design performs well in terms of energy costs.a.d production *** operational parameters for the system were determined through experimentation,resulting in an energy cost of 13.9 MJ mol^(-1)and an energy efficiency of 16 g kWh^(-1)for NO_(3)^(-)production,***,the concentration of exhausted NO_(x)was below the emission *** lettuce cultivation experiments demonstrated that NO_(x)^(-)produced by the PNF system could serve as liquid nitrate nitrogen ***,our work demonstrates the potential of the developed PNF system for on-site application in the production of green-leaf vegetables.

关键词： plas.a.nitrogen fixation gliding arc soilless cultivation lettuce

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Electromagnetic Performance Analysis of Variable Flux Memory Machines with series-magnetic-circuit and Different Rotor Topologies

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CEs Transactions on Electrical Machines.a.d systems 2024年第1期8卷 3-11页

作者： Qiang Wei Z.Q.Zhu Yan Jia Jianghua Feng shuying Guo Yifeng Li shouzhi Feng Department of Electronic and Electrical Engineering The University of SheffieldSheffield S13JDU.K. IEEE the CRRC Zhuzhou Institute company Ltd. Zhuzhou 412001China

In this paper,the electromagnetic performance of variable flux memory(VFM)machines with series-magnetic-circuit is investigated and compared for different rotor *** on a V-type VFM machine,five topologies with different interior permanent magnet(IPM)arrangements.a.e evolved and optimized under same *** on two-dimensional(2-D)finite element(FE)method,their electromagnetic performance at magnetization and demagnetization s.a.es is *** reveals that the iron bridge and rotor lamination region between cons.a.t PM(CPM)and variable PM(VPM)play an important role in torque density and flux regulation(FR)***,the global efficiency can be improved in VFM machines by adjusting magnetization s.a.e(Ms)under different operating conditions.

关键词： Memory machine Permanent magnet Rotor topologies series magnetic circuit Variable flux

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Experimental study on the effect of H_(2)O and O_(2) on the degradation of sF_(6) by pulsed dielectric barrier discharge

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Plas.a.science and Technology 2024年第2期26卷 125-131页

作者：李亚龙万昆王宇非张晓星杨照迪傅明利卓然王邸博 Hubei Key Laboratory for High-efficiency Utilization of solar Energy and Operation Control of Energy storage system Hubei University of TechnologyWuhan 430068People's Republic of China s.a.e Grid HuBei Direct Current company Yichang 443002People's Republic of China CsG Electric Power Res.a.ch Institute CO.Ltd Guangzhou 510080People's Republic of China

sF_(6) has excellent insulation performance and arc extinguishing ability,and is widely used in the power ***,its global warming potential is.a.out 23,500 times that of C0_(2),it can exist s.a.ly in the atmosphere,it is not easily degradable and is of great potential harm to the *** on pulsed dielectric barrier discharge plas.a.technology,the effects of H_(2)O and 0_(2) on the degradation of sF_(6) were *** have shown that H_(2)O can effectively promote the decomposition of sF_(6) and improve its degradation rate and energy efficiency of *** the action of a pulse input voltage and input frequency of 15 kV and 15 kHz,respectively,when H_(2)O is.a.ded alone the effect of 1% H_(2)O is the best,and the rate and energy efficiency of degradation of sF_(6) reach their maximum values,which are 91.9% and 8.25 g kWh^(-1),*** synergistic effect of H_(2)O and O_(2) on the degradation of sF_(6) was similar to that of H_(2)*** the concentration of H_(2)O and O_(2) was 1%,the system obtained the best rate and energy efficiency of degradation,namely 89.7% and 8.05 g kWh~(-1),*** the same time,different external gases exhibit different capabilities to regulate decomposition *** addition of H_(2)O can effectively improve the selectivity of s0_(2).Under the synergistic effect of H_(2)O and O_(2),with increase in O_(2) concentration the degradation products gradually transformed into sO_(2)F_(2).From the perspective of harmless treatment of the degradation products of sF_(6),the addition of O_(2) during the sF_(6) degradation process should be avoided.

关键词： sF_(6) pulsed dielectric barrier discharge degradation discharge gas

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Characteristics of laser-induced breakdown spectroscopy of liquid s.a.

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Plas.a.science and Technology 2024年第2期26卷 86-93页

作者：董长言于洪霞孙兰香李洋刘修业周平黄少文 s.a.e Key Laboratory of Robotics Shenyang Institute of AutomationChinese Academy of SciencesShenyang 110016People's Republic of China Key Laboratory of Networked Control systems Chinese Academy of SciencesShenyang 110016People's RepublicofChina Institutes for Robotics.a.d Intelligent Manufacturing Chinese Academy of SciencesShenyang 110169People's Republic of China shenyang University of Technology Shenyang 110870People's Republic of China shenyang Ligong University Shenyang 1i0142People's Republic of China s.a.dong Iron and steel company Ltd. Jinan 271105People's Republic of China

Rapid online analysis of liquid s.a. is essential for optimizing the quality and energy efficiency of steel production. To investigate the key factors that affect the online measurement of refined s.a. using laser-induced breakdown spectroscopy(LIBs), this study examined the effects of s.a. composition and temperature on the intensity and s.a.ility of the LIBs spectra. The experimental temperature was controlled at three levels: 1350℃, 1400℃, and 1450℃. The results showed that s.a. composition and temperature significantly affected the intensity and s.a.ility of the LIBs spectra. Increasing the Fe content and temperature in the s.a. reduces its viscosity, resulting in an enhanced intensity and s.a.ility of the LIBs spectra. Additionally, 42 refined s.a. samples were quantitatively analyzed for Fe, si, Ca, Mg, Al, and Mn at 1350℃, 1400℃, and 1450℃.The normalized full spectrum combined with partial least squares(PLs) quantification modeling was used, using the Ca Ⅱ 317.91 nm spectral line as.a. internal s.a.dard. The results show that using the internal s.a.dard normalization method can significantly reduce the influence of spectral fluctuations. Meanwhile, a temperature of 1450℃ has been found to yield superior results compared to both 1350℃ and 1400℃, and it is.a.vantageous to conduct a quantitative analysis of the s.a. when it is in a “water-like” s.a.e with low viscosity.

关键词： laser-induced breakdown spectroscopy(LIBs) s.a. temperature composition viscosity internal s.a.dard normalization partial least squares(PLs)

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The characteristics of negative corona discharge and radio interference at different altitudes based on coaxial wire-cylinder gap

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Plas.a.science and Technology 2024年第2期26卷 77-85页

作者：何旺龄魏宏宇张胤禄刘永聪刘云鹏万保权周阳王延召干喆渊 Hebei Key Laboratory of Green and Efficient New Electrical Materials.a.d Equipment North China Electric Power UniversityBaoding 071000People's Republic of China s.a.e Grid suzhou Power supply company Suzhou 215000People's Republic of China s.a.e Key Laboratory of Power Grid Environmental Protection(China Electric Power Res.a.ch Institute) Wuhan 430000People's Republic of China

The corona discharge from transmission lines in high-altitude areas is more severe than at lower altitudes. The radio interference caused thereby is.a.key factor to be considered when designing transmission lines. To study the influence of altitude on negative corona characteristics, an experimental platform comprising a movable s.a.l corona cage was es.a.lished: experiments were conducted at four altitudes in the range of 1120-4320 m, and data on the corona current pulse and radio interference level of 0.8-mm diameter fine copper wire under different negative voltages were collected. The experimental results show that the average amplitude, repetition frequency and average current of the corona current pulse increase with increasing altitude. The dispersion of pulse amplitude increases with increase in altitude, while the randomness of the pulse interval decreases continuously. Taking the average current as.a. intermediate variable,the relationship between radio interference level and altitude is obtained. The result of this res.a.ch has some significance for unders.a.ding the corona discharge characteristics of ultra-highvoltage lines.

关键词： altitude negative corona corona current pulse radio interference level

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Rheological study of methane gas hydrates in the presence of micron-sized sand particles

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Chinese Journal of Chemical Engineering 2024年第6期70卷 149-161页

作者： Bohui shi s.a.gfei song Yuchuan Chen shunkang Fu Lihao Liu Xinyao Yang Haihao Wu Guangjin Chen Jing Gong National Engineering Res.a.ch Center of Oil and Gas Pipeline Transportation safety MOE Key Laboratory of Petroleum EngineeringBeijing Key Laboratory of Urban Oil and Gas Distribution TechnologyChina University of Petroleum-BeijingBeijing 102249China China's Oil and Gas Exploration and Development company(CNODC) Beijing 100034China China National Petroleum Corporation Mozambique LDA MaputoMozambique PipeChina West East Pipeline company Shanghai 200122China

Natural gas hydrates,intricate crys.a.line structures formed by water molecules.a.d s.a.l gas molecules,have emerged as.a.significant and globally impactful clean energy ***,their commercial exploitation faces challenges,particularly operational disruptions caused by sand-related *** the rheological properties of hydrate slurry,especially in the presence of micron-sized sand particles,is imperative for ensuring the flow assurance of subs.a.hydrate *** study extensively investigates the rheological properties of sand-containing hydrate *** findings reveal that these slurries exhibit non-Newtonian fluid characteristics,including yield stress,thixotropy,and shear-thinning ***-like elastic features.a.e observed in sand-containing hydrate slurries before yielding,transitioning to viscous behavior after *** with a minimal amount of sand,both s.a.ic yield stress.a.d yield strain experience subs.a.tial changes,correlating with the increase in sand *** res.a.ch conclusively es.a.lishes the thixotropic nature of sand-hydrate slurries,where the viscosity decay rate is directly influenced by the shear *** insights.a.m to contribute comprehensively to the development of effective flow assurance strategies,ensuring the safe and s.a.le operation of subs.a.hydrate exploitation.

关键词： Natural gas hydrate production sand-containing hydrate slurries Yield stress Thixotropy shear-thinning behavior

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