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Prospects of the Multi-channel Photometric survey Telescope in the Cosmological Application of Type Ia supernovae

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Research in Astronomy and Astrophysics 2024年第4期24卷 183-191页

作者： Zhenyu Wang Jujia Zhang Xinzhong er Jinming Bai Yunnan Observatories Chinese Academy of SciencesKunming 650216China University of Chinese Academy of sciences Beijing 100049China Key Laboratory for the structure and Evolution of Celestial Objects Chinese Academy of SciencesKunming 650216China International Centre of supernovae Yunnan Key LaboratoryKunming 650216China south-Western Institute for Astronomy Research Yunnan UniversityKunming 650500China

The Multi-channel Photometric survey Telescope(Mephisto)is a real-time,three-color photometric system designed to capture the color evolution of stars and transients *** telescope system can be crucial in cosmological distance measurements of low-redshift(low-z,z■0.1)Type Ia supernovae(sNe Ia).To optimize the capabilities of this instrument,we perform a comprehensive simulation study before its official operation is scheduled to *** considering the impact of atmospheric extinction,weather conditions,and the lunar phase at the observing site involving the instrumental features,we simulate light curves of sNe Ia obtained by *** best strategy in the case of sN Ia cosmology is to take the image at an exposure time of 130 s with a cadence of 3 *** this condition,Mephisto can obtain hundreds of high-quality sNe Ia to achieve a distance measurement better than 4.5%.Given the on-time spectral classification and monitoring of the Lijiang 2.4 m Telescope at the same observatory,Mephisto,in the whole operation,can significantly enrich the well-calibrated sample of supernovae at low-z and improve the calibration accuracy of high-z sNe Ia.

关键词： (stars:)supernovae:general (cosmology:)cosmological parameters telescopes

Pinus sylvestris and Picea abies canopy effects on deposition of air pollutants

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Journal of Forestry Research 2024年第4期 38-50页

作者： Valentinas ?erniauskas Iveta Varnagiryt?-Kaba?inskien? Valda Araminien? Vidas stak?nas Lithuanian Research Centre for Agriculture and Forestry Instituto Av.1

Tree canopies influence atmospheric pollutant depositions depending on type,ecosystem characteristics,and local climatic *** study investigated the impact of Pinus sylvestris *** Picea abies （L.） ***.,and a mixture of both,on the chemical composition of *** permanent plots within the ICP forest level II monitoring network in Lithuania were selected to illustrate typical hemiboreal coniferous *** study analysed（1） the concentrations of NO2,NH3and sO2in the ambient air;（2） the concentrations of sO42-,NO3-,NH4+,Na+,K+,Ca2+and Cl–in throughfall beneath canopies and in precipitation collected in an adjacent field,and （3） s and total N,Na+,K+,Ca2+and Cl-depositions in throughfall and precipitation over 2006–*** show a significant decrease in sO2emissions in the ambient air;NO2and NH3emissions also *** canopies reduced the acidity of throughfall,although they led to notably higher concentrations of sO42-,NO3-,Na+,and particularly K+.During the study,low variability in NO3–deposition and a decrease in NH4+deposition *** loads increased by 20–30% when precipitation passed through the *** cumulative deposition of s,Cl,Na,K,Ca,and N was greater under *** than under ***,K deposition in throughfall was considerably lower under *** compared to the *** or mixed *** s depositions declined across all three coniferous ***,there was no specific effect of tree species on throughfall chemistry.

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Quantitative characterizations of anisotropic dynamic properties in organic-rich shale with different kerogen content

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Petroleum science 2024年第2期21卷 855-865页

作者： Jian-Yong Xie Yan-Ping Fang Xing-Hua Wu Jian'er Zhao Jun-Cheng Dai Jun-Xing Cao Ji-Xin Deng state Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of TechnologyChengdu610059SichuanChina Key Lab of Earth Exploration&Information Techniques of Ministry of Education Geophysical InstituteChengdu University of TechnologyChengdu610059SichuanChina PetroChina southwest Oil&Gasfield Company Chengdu610017SichuanChina

Understanding the quantitative responses of anisotropic dynamic properties in organic-rich shale with different kerogen content(KC)is of great significance in hydrocarbon exploration and *** controlled experiments with a single variable is challenging for natural shales due to their high variations in components,diagenesis conditions,or pore *** employed the hot-pressing technique to construct 11 well-controlled artificial shale with varying *** artificial shale samples were successive machined into prismatic shape for ultrasonic measurements along different *** revealed bedding perpendicular P-wave velocities are more sensitive to the increasing KC than bedding paralleling velocities due to the preferential alignments of *** elastic stiffnesses except C_(13)are generally decreasing with the increasing KC,the variation of C_(1) and C_(33)on kerogen content are more sensitive than those of C_(44)and C_(66).Apparent dynamic mechanical parameters(v and E)were found to have linear correlation with the true ones from complete anisotropic equations independent of KC,which hold value towards the interpretation of well logs consistently across formations,Anisotropic mechanical parameters(ΔE and brittlenessΔB)tend to decrease with the reducing KC,withΔB showing great sensitivity to KC *** the range of low KC(s) ratio demonstrated a linearly negative correlation with KC,and the V_(P)/V_(s) ratio magnitude of less than 1.75may serve as a significant characterization for highly organic-rich(>10%)shale,compilation of data from natural organic rich-shales globally verified the similar systematic relationships that can be empirically used to predict the fraction of KC in shales.

关键词： Elastic properties Organic shale Anisotropy Kerogen content Physical modeling

A review of reservoir damage during hydraulic fracturing of deep and ultra-deep reservoirs

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Petroleum science 2024年第1期21卷 384-409页

作者： Kun Zhang Xiong-Fei Liu Dao-Bing Wang Bo Zheng Tun-Hao Chen Qing Wang Hao Bai er-Dong Yao Fu-Jian Zhou National Key Laboratory of Petroleum Resources and Engineering China University of Petroleum-BeijingBeijing102249China school of Mechanical Engineering Beijing Institute of Petrochemical TechnologyBeijing102617China Tuha Downhole Operation Company CNPC Xibu Drilling Engineering Company LimitedShanshan838200XinjiangChina

Deep and ultra-deep reservoirs have gradually become the primary focus of hydrocarbon exploration as a result of a series of significant discoveries in deep hydrocarbon exploration *** reservoirs present unique challenges due to their deep burial depth(4500-8882 m),low matrix permeability,complex crustal stress conditions,high temperature and pressure(HTHP,150-200℃,105-155 MPa),coupled with high salinity of formation ***,the costs associated with their exploitation and development are exceptionally *** deep and ultra-deep reservoirs,hydraulic fracturing is commonly used to achieve high and stable *** hydraulic fracturing,a substantial volume of fluid is injected into the ***,statistical analysis reveals that the flowback rate is typically less than 30%,leaving the majority of the fluid trapped within the ***,hydraulic fracturing in deep reservoirs not only enhances the reservoir permeability by creating artificial fractures but also damages reservoirs due to the fracturing fluids *** challenging“three-high”environment of a deep reservoir,characterized by high temperature,high pressure,and high salinity,exacerbates conventional forms of damage,including water sensitivity,retention of fracturing fluids,rock creep,and proppant *** addition,specific damage mechanisms come into play,such as fracturing fluid decomposition at elevated temperatures and proppant diagenetic reactions at HTHP ***,the foremost concern in deep oil and gas development lies in effectively assessing the damage inflicted on these reservoirs by hydraulic fracturing,comprehending the underlying mechanisms,and selecting appropriate ***'s noteworthy that the majority of existing studies on reservoir damage primarily focus on conventional reservoirs,with limited attention given to deep reservoirs and a lack of systematic *** light of this,our approach entails initially summarizin

关键词： Artificial fracture Deep and ultra-deep reservoir Fracture conductivity Fracturing fluid Hydraulic fracturing Reservoir damage

The Return of Ten Thousand Birds

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China Book International 2024年第3期 91-93页

作者： Jin Duo'er Children's Literature Committee of the Jiangxi Provincial Writers Association

At dawn,when the sun beats its drum,Yingpanxu *** along With it,in addition to Yingpanxu's lush vegetation and curling cooking smoke,are the birds in the forest:egrets,cuckoos,turtledoves,willow warblers,shrikes,white pheasants,long-billed crows,pine *** spirits of the earth,fapping their wings,lightly tracing beautiful arcs through the forests and *** milk-like fog in the forest,and the towering mountains piercing into the clouds,become even more poetic and lively amidst the chorus of bird calls.

关键词： forest smoke mountains

Evaluation of the injection and plugging ability of a novel epoxy resin in cement cracks

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Petroleum science 2024年第2期21卷 1211-1220页

作者： Guang-Yao Leng Wei Yan Hai-Mu Ye er-Dong Yao Ji-Bin Duan Zheng-Xian Xu Ke-Pei Li Jing-Ru Zhang Zhong Li state Key Laboratory of Petroleum Resource&Prospecting China University of Petroleum(Beijing)Beijing102249China CNPC Liaohe Oilfield Gas storage Co.LTD Panjin124000LiaoningChina CNOOC Research Institute Co. Ltd.Beijing100028China

sustained casing pressure(sCP)is a crucial issue in the oil and gas production *** resins,exhibiting exceptional compressive strength,ductility,and shear bonding strength,have the potential to form reliable *** injectivity and sealing capacity of the epoxy resin is crucial parameters for the success of shallow remediation *** study aimed to develop and assess a novel solid-free resin sealant as an alternative to Portland cement for mitigating fluid *** investigation evaluated the viscosity,compressive strength,and brittleness index of the epoxy resin sealant,as well as its tangential and normal shear strengths in conjunction with casing *** flow characteristics and sealing abilities of conventional cement and epoxy resin were comparatively analyzed in *** results showed that the application of a viscosity reducer facilitated control over the curing time of the epoxy resin,ranging from 1.5 to 6 h,and reduced the initial viscosity from 865.53 to 118.71 m Pa,*** mechanical properties of the epoxy resin initially increased with a rise in curing agent content before experiencing a minor *** epoxy resin containing 30%curing agent exhibited optimal mechanical *** a 14-day curing period,the epoxy resin's compressive strength reached81.37 MPa,2.12 times higher than that of cement,whereas the elastic modulus of cement was 2.99 times greater than that of the epoxy *** brittleness index of epoxy resin is only 3.42,demonstrating high flexibility and *** tangential and normal shear strengths of the epoxy resin exceeded those of cement by 3.17 and 2.82 times,*** a 0.5 mm-wide crack,the injection pressure of the epoxy resin remained below 0.075 MPa,indicating superior injection and flow ***,the injection pressure of cement surged dramatically to 2.61 MPa within 5 *** breakthrough pressure of0.5 PV epoxy resin reached 7.53 MPa,decreasing the crack's perme

关键词： sustained casing pressure Epoxy resin sealant Curing agent Viscosity reducer Mechanical properties Crack sealing

An Integrated Bipolar Picture Fuzzy Decision Driven system to scrutinize Food Waste Treatment Technology through Assorted Factor Analysis

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Computer Modeling in Engineering & sciences 2024年第9期140卷 2665-2687页

作者： Navaneethakrishnan suganthi Keerthana Devi samayan Narayanamoorthy Thirumalai Nallasivan Parthasarathy Chakkarapani sumathi Thilagasree Dragan Pamucar Vladimir simic Hasan Dinçer serhat Yüksel Department of Mathematics Bharathiar UniversityCoimbatore641046India Department of Mathematics Sri Ramakrishna Mission Vidyalaya College of Arts and ScienceCoimbatore641020India Department of Operations Research and statistics Faculty of Organizational SciencesUniversity of BelgradeBelgrade11000Serbia College of Engineering Department of Industrial Engineering and ManagementYuan Ze UniversityTaoyuan City320315TaiwanChina Faculty of Transport and Traffic Engineering University of BelgradeVojvode Stepe 305Belgrade11000Serbia Department of Computer science and Engineering College of InformaticsKorea UniversitySeoul02841Republic of Korea school of Business Istanbul Medipol UniversityIstanbul34083Turkey Department of Economics and Management Khazar UniversityBakuAzerbaijan

Food Waste(FW)is a pressing environmental concern that affects every country *** one-third of the food that is produced ends up as waste,contributing to the carbon ***,the FW must be properly treated to reduce environmental *** study evaluates a few available Food Waste Treatment(FWT)technologies,such as anaerobic digestion,composting,landfill,and incineration,which are widely used.A Bipolar Picture Fuzzy set(BPFs)is proposed to deal with the ambiguity and uncertainty that arise when converting a real-world problem to a mathematical model.A novel Criteria Importance Through Intercriteria Correlation-stable Preference Ordering Towards Ideal solution(CRITIC-sPOTIs)approach is developed to objectively analyze FWT selection based on thirteen criteria covering the industry’s technical,environmental,and entrepreneurial *** CRITIC method is used for the objective analysis of the importance of each criterion in FWT *** sPOTIs method is adopted to rank the alternative hassle-free,following the *** proposed model offers a rank reversal-free model,i.e.,the rank of the alternatives remains unaffected even after the addition or removal of an *** addition,comparative and sensitivity analyses are performed to ensure the reliability and robustness of the proposed model and to validate the proposed result.

关键词： Fuzzy food waste treatment selection bipolar picture fuzzy set and decision-making

Bringing New Life to the Ancient Grand Canal Celebrating the Tenth Anniversary of the Grand Canal's Inscription on the World Heritage List

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China & The World Cultural Exchange 2024年第8期 30-32页

作者： Wang Jue Li Zhuo'er 不详

A Grand Canal,spanning ancient and modern times,traversing north and south,flows *** Grand Canal,stretching nearly 3,200 kilometers and with a history of over 2,500 years,is the world's largest,longest,and oldest *** June 22,2014,the Grand Canal was officially inscribed on the World Heritage List by the World Heritage Committee at its 38th session.

关键词： Grand stretching Ancient

邦有道,亦可隐:东汉初年的隐逸风气与正统重建

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史林 2024年第3期 58-69,218页

作者：王尔中国人民大学历史学院 100872

东汉初年,中国历史上首次出现大批士人隐逸,其背后蕴含皇权消长、政局波动、天命承接、个人崛起、风俗迁移等种种意涵。经历了两汉之际诸政权没有定数的竞夺,西汉士人带着谁是“猎者”的困惑,开始处理其与东汉王朝的关系。隐逸成为他们... 详细信息

东汉初年,中国历史上首次出现大批士人隐逸,其背后蕴含皇权消长、政局波动、天命承接、个人崛起、风俗迁移等种种意涵。经历了两汉之际诸政权没有定数的竞夺,西汉士人带着谁是“猎者”的困惑,开始处理其与东汉王朝的关系。隐逸成为他们选择的一种方式。隐逸者多为西汉遗臣耆老,他们对年轻的刘秀集团并不信任,对后者建立新汉朝的合法性、对两汉承续关系多有怀疑,隐逸是他们宣示抵而不抗的一种姿态。选择出仕者与光武帝在政见上多有不合,又因谏诤而遭致排抑,唯有隐退方能保存尊严。面对众多士人的“不臣”,光武恩威并施,采取“圣主不宾”的策略,以容忍隐者、鼓励守节彰显自己“明王圣主”的品质。这种政策助长了隐逸的风气,推动了个体自立潮流的泛滥,形成东汉初年一种“邦有道,亦可隐”的新观念。隐逸的正当化,既缓解了遗臣士人与光武集团的紧张关系,又使隐逸转化为东汉重建正统的思想资源。“隐”由此获得了独立存在的意义。

关键词：东汉初年隐逸正统性光武帝遗臣 “圣主不宾”