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摘要： Iron formations are valuable archives of sedimentary conditions and post-depositional events.However,geochemical proxies commonly used to determine genetic characteristics can be variably modified during metamorphism and deformation,hampering their use as records of regional geological events.This work focuses on strongly reworked magnetite-quartz-rich rocks from the São Josédo Campestre Massif,one of the oldest fragments of preserved crust in South America.The genetic classification of these magnetite-quartz-rich rocks is not straightforward because primary assemblages and textures were variably modified by granulite facies metamorphism during a regional Paleoproterozoic migmatization event.To address genetic ambiguities,we analyzed their magnetite and pyroxene chemistry,wholerock geochemistry,and Sm-Nd isotopes.Magnetite chemistry indicates that pyroxene-poor iron formations(Type B)are low in trace elements such as Ti,Al,V,and Mn,suggesting a chemical similarity to iron formations elsewhere.In contrast,magnetites from pyroxene-enriched Type A iron formations are rich in trace elements and more akin to magnetite crystallized from higher temperature systems,such as skarn and IOCG.The^(147)Sm/^(144)Nd of these rocks show substantial variation even at the outcrop scale,indicating a locally-controlled,highly heterogeneous mixture of Archean,Paleoproterozoic,and Neoproterozoic sources.Therefore,our geochemical tools point out to heterogenous signatures of these magnetitequartz rocks and proxies compatible with both low and high-temperature conditions and age of deposition spanning sources from the Archean to the Neoproterozoic.We interpret that the studied São Josédo Campestre magnetite-quartz rocks represent Archean iron formations with original magnetite chemistry and isotopic signatures variably modified by metamorphism and by at least one deformation-related hydrothermal event.These results contrast with similar examples from China and Greenland where iron formations either preserved the magnetite chemistry or the primary isotopic signatures.Our study indicates that metamorphism can selectively affect chemical proxies used to study iron formations and undermine the genetic classification of iron ores.Thus,these proxies should be carefully applied in the interpretation of syn-depositional environments of polydeformed belts.

摘要： “The Lyrics from Jeremiah”is used as the title for the 76 poems that I am writing from Jeremiah in the Bible.And here the following thirteen poems have been written from the chapters of Jeremiah 1-5.

摘要： 【夏日阳光】夏日的阳光,叶子微微被风吹着。zkx,能成为你的白扁豆,是我的幸运,和你坐在一起很开心,和你待在一起感到很放松愉悦。春天再美也比不上你的笑,没见过你的人自然不会明了。希望友谊99!From xzq(158****7178)。

摘要： Objective The Hengjian uranium deposit is a typical hydrothermal deposit in the Xiangshan uranium ore field.The uranium mineralization ages of the Xiangshan deposits are poorly constrained,and only a few mineralization ages using the pitchblende U–Pb method have been published.These ages are commonly discordant and dispersed for abundant inclusions and an open U–Pb system.Zircon grains after strong hydrothermal alteration are usually characterized by high common Pb contents,and their U–Pb isochron ages recorded the hydrothermal alteration event without interference of common Pb components.The Hengjian gray/grayish-green granite porphyry experienced strong alteration by hydrothermal fluids during the pervasive uranium mineralization in the Xiangshan uranium ore field.Uranium mineralization in the Hengjian deposit may had different stages,and strong hydromicatization alteration occurred at a relatively early stage.Their altered zircon U–Pb isochron ages possibly represent relatively early mineralization age of the Xiangshan uranium deposits.Altered zircon grains from the Hengjian granite porphyry were analyzed using the secondary ion mass spectrometry(SIMS)U-Pb method in this study,and U–Pb isochron ages were measured to constrain the relatively early mineralization age of the Hengjian uranium deposit.

摘要： Objective Though the Central Asian Orogenic Belt (CAOB) is characterized by widespread Phanerozoic crustal growth,there is little juvenile crust documented in its southeastern segment,northern margin of the North China Craton(NCC)(Zhang et al,2007,2009).Late Carboniferous Dongwanzi ultramafic-mafic cumulate complex occurs in northern margin of the NCC and is intruded by a syenite with depleted Sr-Nd isotopes (Ma et al.,2014).However,the age and petrogenesis of this syenite is poorly constrained.In this study,we present new petrological,zircon U-Pb and Hf isotopic data of the Dongwanzi syenite,in order to put insights on its formation age and petrogenetic relationship with cumulates.

摘要： Objective The Dayangshu Basin located in eastern Inner Mongolia,is one of the key areas for oil and gas exploration in the periphery of Songliao Basin.So far,this basin has been poorly explored,and the basic geological research is still weak,due to the lack of high-quality paleontologic and stratigraphic data.The previous oil and gas investigations were mainly focused on the Early Cretaceous strata.However,the Late Cretaceous Nenjiang Formation in the basin also has hydrocarbon potential according to the latest research.In recent oil and gas geological survey,palynological fossils have been discovered from the Nenjiang Formation in the Dayangshu Basin,providing new evidence for biostratigraphic division and correlation.

摘要： Objective The Beiya super-large Au-rich porphyry deposit(304 t Au,2.4 g/t Au)is located within the western Yangtze craton,to the southeast of the Sanjiang Tethyan Orogen(Fig.1).The ore-forming porphyry is adakitic,characterized by high Sr/Y and La/Yb ratios coupled with low Y and Yb contents,and is generally thought to be derived from partial melting of thickened mafic lower crust.The lower crust underneath the western Yangtze craton is mainly composed of ancient crust with Archean ages,juvenile crust resulting from the Neoproterozoic subduction(740–1000 Ma),and late Permian juvenile crust related to the Emeishan mantle plume.Which lower crustal end-member has played a critical role in genesis of the Beiya ore-forming porphyry can be constrained by zircon U-Pb ages of amphibolite xenoliths hosted in the ore-forming porphyry,because these xenoliths represent direct samples of the source.In this study,we present new zircon U-Pb ages of these amphibolite xenoliths to have insight into the nature of the Beiya adakitic porphyry source.

摘要： Humid air awaited my arrival at Fuzhou Changle Airport.Upon emerging from the airport,I found myself overwhelmed by mountains embracing Fuzhou.I also couldn’t help but notice roots hanging to the ground from the branches of banyan trees on either side of the streets.

摘要： 日前,2019 年劳伦斯·奥利弗奖(Laurence Olivier Awards)在伦敦皇家阿尔伯特音乐厅隆重举行。史蒂芬·达尔德里执导的戏剧《继承》(The Inheritance ),以及音乐剧《来自远方》(Come from Away )、《伙伴们》(Company)成为2019 年奥利弗奖的最大赢家。斩获4 项奥利弗奖的音乐剧《来自远方》,是一部由真实故事改编的音乐剧,讲述了加拿大纽芬兰省默默无闻的小镇甘德在“9·11”事件后,庇护了数千名滞留的航空公司乘客的故事。剧本和词曲皆由艾琳·桑科芙(IreneSankoff)和大卫·海恩(David Hein)夫妇操刀创作。

摘要： 盛夏未至,来自南太平洋的海风已经徐徐吹入。正在上海博物馆举行的"浮槎于海:法国凯布朗利博物馆藏太平洋艺术珍品展",是国内引进的首个较为完整地呈现大洋洲艺术的展览,以150件精彩纷呈的艺术品向人们讲述了来自太平洋波涛深处的美和往事。在澳大利亚大陆的北部,美拉尼西亚、密克罗尼西亚和波利尼西亚群岛如同千百颗珍珠穿成三层项链.

摘要： 本发明涉及气垫船运动控制领域，具体涉及的是一种基于纵向速度规划的气垫船高速回转控制方法。本发明采用基于侧滑角约束的航速规划方法解决了气垫船采用传统非线性反馈控制在高速回转时的失速问题，能够保证气垫船在回转的同时实现精确的航速跟踪，提高了气垫船的机动性和作业能力，本发明在保证气垫船在高速回转过程中准确跟踪期望艏向的同时避免回转率过大导致的甩尾现象，提高了气垫船在高速回转时的可靠性和安全性。

摘要： 本发明适用于材料技术领域，提供了一种低光泽度聚氯乙烯材料及其制备方法、应用，其中，所述低光泽度聚氯乙烯材料包括以下重量份数的原料：聚氯乙烯树脂80～100份、稳定剂1～10份、增塑剂4～15份、加工助剂0.8～5份、改质剂4～15份、消光剂0～5.5份以及润滑剂0.5～5份。本发明通过稳定剂、增塑剂、加工助剂、改质剂、消光剂以及润滑剂各原料的合理配比，配合特定种类的聚氯乙烯树脂，所得到的低光泽度聚氯乙烯材料，不仅易于加工成型、且具有较为优异力学性能，且低光泽度，耐温以及成本低；另外，通过消光剂的加入可进一步降低材料光泽度的同时，进一步提高本发明聚氯乙烯材料机械力学性能，具有很好的经济效益。

摘要： 本发明涉及光纤耦合技术领域，尤其涉及一种高效率的叠阵型半导体激光器，包括激光源、光束整形组件、会聚透镜、鲍威尔棱镜组件和光纤；所述激光源发出的光束经过光束整形组件进行整形；整形后的光束经会聚透镜会聚，会聚后光束经过鲍威尔棱镜组件进行光束整形可以耦合进光纤的光束。本发明系统结构简单,便于操作,减少了操作步骤,光纤耦合效率达到84.3％。

摘要： 本申请公开了一种变频空调控制方法、装置、电子设备和介质。其中方法包括：获取空调的设置温度值，获取当前室内温度值；根据所述设置温度值、所述当前室内温度值和预设偏差阈值，确定所述变频空调的系统负荷率；获取当前室外温度值，获取所述变频空调的目标器件的信息；依据所述当前室外温度值、所述目标器件的信息以及所述系统负荷率，确认总传热温差；以达到所述总传热温差为目标，对所述变频空调的制冷系统进行控制，可以控制空调系统在不同负荷率下、不同室外温度值下运行在比较高的能效，实现空调系统节能运行。

摘要： 本发明涉及兽医生物技术领域，尤其涉及一种猪轮状病毒重组蛋白以及表达该蛋白的重组腺病毒和应用。所述所述重组蛋白由猪轮状病毒5型VP7蛋白和猪轮状病毒9型VP8蛋白连接组成，具体包括如SEQ ID NO:1所示的氨基酸序列。本发明将猪轮状病毒5型VP7蛋白和猪轮状病毒9型VP8蛋白的编码基因的基因序列构建至腺病毒表达载体中，并进行密码子优化，制备得到针对猪轮状病毒的重组腺病毒，该重组腺病毒表达的目的蛋白的结构和功能与天然状态完全一致，具有较高的安全性和免疫原性。

摘要： 本发明公开了一种改性TPEE电缆料及其制备方法，所述改性TPEE电缆料，按重量份数计，其组分包含改性TPEE100份，阻燃剂50‑100份，阻燃协效剂2‑10份，润滑剂1‑5份，抗氧剂1‑5份，助剂5‑10份。本发明提供的改性TPEE电缆料通过对TPEE接枝功能化石墨烯，以及对阻燃剂氢氧化镁进行改性，使其兼具优异的阻燃性能，力学性能，热老化性能以及加工性能，并且可回收利用，环境友好。

摘要： 本发明公开了一种路线规划方法，包括：获取N个订单的物流信息，所述物流信息包括订单地址，所述订单地址包括第一地址以及第二地址，其中，所述第一地址为目的地在直送范围内的地址，所述第二地址为目的地在直送范围外的地址，N为正整数；筛选出所述订单地址为所述第一地址的M个订单，确定配送M个订单的第一初始路线，对所述第一初始路线进行优化，得到第一优化路线，M为小于等于N的正整数；筛选出所述订单地址为所述第二地址的N‑M个订单，确定配送所述N‑M个订单的第二初始路线，对所述第二初始路线进行优化，得到第二优化路线。

摘要： 本发明公开了一种芳砜纶/四氧化三铁磁性长丝的制备方法，包括如下步骤：四氧化三铁磁性纳米颗粒制备、芳砜纶/四氧化三铁共混纺丝液制备、湿法纺丝，得到具有不同截面形状的磁性长丝。本发明可以实现芳砜纶的连续化湿法纺丝，制备过程温和可控；本发明将四氧化三铁磁性颗粒结合到芳砜纶纤维中，可以实现芳砜纶纤维的功能化，使得芳砜纶纤维具备磁性；本发明采用蛋白模板调控法制备四氧化三铁磁性颗粒，实现四氧化三铁磁性颗粒形貌及尺寸调控，同时使得纳米颗粒在纺丝液中分散均匀性；本发明制备的芳砜纶/四氧化三铁磁性长丝可用于保健、过滤、智能纺织品等领域。

摘要： 本发明属于污水处理技术领域，尤其是涉及一种污水水质预处理快速检测装置，包括检测水箱，检测水箱内壁上固定连接有第一竖板和第二竖板，第一竖板和第二竖板将检测水箱分隔成处理腔室、检测腔室和储存腔室，处理腔室内底壁上固定连接有向下延伸的梯形凸起，且梯形凸起内形成沉淀腔室，梯形凸起的下端固定连接有两根竖直的排污管，检测水箱的侧壁上固定连接有与处理腔室连通的污水进水管。优点在于：本发明可以对不同分层的污水进行水质检测，且多层之间的检测过程均为独立过程，不会出现相互之间的影响，能够对污水进行实时的检测，有助于后续的数据统计，另外采用分级式的检测方式，能够有效的对污水进行全面的检测，提高检测的质量。

摘要： 本发明公开了一种软硬件联合验证系统及方法。该系统包括：驱动软件、基于systemc模拟的存储器和异构集群；驱动软件嵌入在systemc框架中；驱动软件根据预设验证需求向异构集群发送驱动指令；存储器加载并保存待验证数据；异构集群根据驱动指令从存储器中提取待验证数据，计算得到输出数据，发送至驱动软件；驱动软件根据输出数据进行软硬件的联合验证。通过systemc模拟异构集群，驱动软件嵌入systemc框架，为驱动软件提供与硬件功能相等的模型，实现驱动软件对硬件的控制流程，协助软件前期的开发与调试，为硬件提供标准数据。解决了现有技术中软件与硬件在大多数的系统开发中分开进行，导致开发周期长的技术问题。