山东胶东型金矿的概念及其特征

胶东型金矿是指产于胶东地区,在同一大地构造背景控制下,由相同的热液成矿作用在断裂构造带的不同部位、不同围岩条件下形成的具有成因相同、形成时代相近的一系列金矿自然类型组合,它不是单一的矿床类型,而是反映构造环境、成矿背景、成矿物质来源与成矿规律的金矿成因系统。胶东型金矿是与壳源重熔形成的层状岩浆岩和壳幔混合型花岗岩有关的金矿床类型的统称,具有独特的成矿条件和成矿作用,涵盖了构造破碎带蚀变交代型、裂隙充填石英脉型、裂隙充填富硫化物石英脉型、层间滑脱拆离带型、构造角砾岩型和碳酸盐岩中裂隙充填蚀变型等胶东所有金矿成因类型,由于成矿时所处构造位置和容矿空间不同而表现为不同金矿类型的集合体。胶东型金矿特征集中体现在3期成矿热事件、3个成矿系列和3期成矿作用上,与金矿关系密切的是玲珑、郭家岭和伟德山3个构造—岩浆热事件,即与胶北地区晚侏罗世玲珑花岗岩有关的钼(钨)—金矿成矿系列、与早白垩世中酸性岩浆有关的金(银)矿成矿系列和与早白垩世中酸性岩浆有关的铜—铅—锌—钼—金矿成矿系列,对应于胶东金矿的早成矿期、主成矿期和叠加成矿期。胶东型金矿表现形式为北东成串、东西成带,断裂是最主要的控矿形式,具有脆性断裂控矿、金矿床等间距性分布和侧伏特征等规律。胶东型金矿具有全新的金矿成因内涵,它反映的既有矿床类型的组合又有成因特征的鲜明特色,是对金矿成矿理论的提升和升华。     

基于AMESim的恒压变量柱塞泵的建模与仿真分析

分析了恒压变量柱塞泵的工作原理和机能,利用AMESim的液压机械信号库建立该型恒压变量柱塞泵的仿真模型,根据恒压变量柱塞泵实际的结构与尺寸设置仿真模型的各个参数,对恒压变量柱塞泵静动态特性进行仿真研究,得出了恒压变量柱塞泵工作时泵口的压力和流量特性曲线。将其与恒压变量柱塞泵的流量压力样本特性曲线对比,具有一定吻合度,说明所建立的该型恒压变量柱塞泵仿真模型是比较准确的。同时得出了恒压变量柱塞泵的超调量及恒压调整时间。     

直驱绞车型升沉补偿系统模拟实验台液压系统的研究

提出了一种基于直驱容积控制用来模拟绞车型升沉补偿系统的实验台方案,利用AMESim软件搭建了该系统的模型,确定了系统的结构和参数,设计了一个伺服电机调速控制和变量泵调排量联合控制器和能量计算器,并对其补偿特性仿真分析和整个系统的能量值计算。结果表明:该系统具有良好的补偿特性,所提出的实验方案可行,控制器的设计能够较好地实现直驱联合控制。能量值计算表明复合控制相对单一的伺服调速控制或单一变排量控制具有明显节能效果。这一成果为实验台的搭建提供了参考。     

G3合金在高温高H2S/CO2环境下临界点蚀温度研究

利用恒电位极化和EIS技术研究G3合金在高温高H₂S/CO₂分压环境下的临界点蚀温度。结果表明,利用恒电位极化技术测试G3合金在高温高H₂S/CO₂分压环境下的临界点蚀温度为58.5℃,而利用EIS方法测试得到G3合金在模拟环境下的临界点蚀温度在50-60℃之间,分别利用恒电位极化和EIS方法测试所得G3合金在模拟环境下的的临界点蚀温度基本一致。     

建筑外墙外保温应用问题分析

外墙外保温系统技术和工程应用在我国已取得很大进步,但是由于多种综合因素的影响,总体状况不容乐观.外墙外保温系统应用原则是技术、工艺、材料越成熟,用户受益越大.指出外墙外保温系统设计、选型、招标、材料采购、施工、成本控制、工程质量控制及材料实验室检测过程中的问题,并通过工程案例说明解决措施.     

Thermopile Infrared Detector with Detectivity Greater Than 10<Superscript>8</Superscript> cmHz<Superscript>(1/2)</Superscript>/W

In this paper, the design, fabrication and experimental results of the thermopile infrared detector, with a single layer of low-stress SiN_x membrane, instead of thin sandwich layer membrane of SiO₂–Si₃N₄ are presented. Thermal isolation is achieved by using back etching of bulk silicon. Thermopiles are consisted of serially interconnected p-poly-Si/Al thermocouples supported by the single layer of SiN_x membrane with low stress. Au/Ti reflective coating was evaporated on the surface of cold junctions of the thermopile to block incident radiation. In the measurement, we find that infrared absorbance of SiN_x membrane to different wavelength is diverse and less than 100%, which has great influence on calculating the actual absorbing power of the detector, so the infrared (IR) transmission spectrum is measured to calibrate the actual infrared absorbing amount of the detector. The analysis result shows that only 43.72% infrared radiation is absorbed by the detector. Based on the measurement of IR transmission spectrum and output voltage of the detector, the response sensitivity of the detector is calculated as 31.65 V/W, detectivity of the detector is 1.16 × 10⁸ cmHz^(1/2)W⁻¹, and response time of the detector is 126 ms.     

基于机器视觉技术的乏燃料贮存格架自动定位试验方法研究与应用

The positioning test of spent fuel racks is a key test in the commissioning of nuclear fuel handling and storage system. It directly affects the safety and efficiency of the receiving and storage of nuclear fuel assemblies. In this paper, the traditional manual positioning test method is studied, and an automatic positioning test method based on the machine vision technology is proposed. Engineering application shows that this method can greatly improve the efficiency of positioning test and reduce the need of manpower. Furthermore, it is also effective in the exclusion of foreign material and the protection of finished products. Therefore, it has considerable benefits in economic, safety and quality.     

Comparison of sample temperature effect on femtosecond and nanosecond laser-induced breakdown spectroscopy

In this paper, we investigated the emission spectra of plasmas produced from femtosecond and nanosecond laser ablations at different target temperatures in air. A brass was selected as ablated target of the experiment. The results indicated that spectral emission intensity and plasma temperature showed similar trend for femtosecond and nanosecond lasers, and the two parameters were improved by increasing the sample temperature in both cases. Moreover, the temperature of nanosecond laser-excited plasma was higher compared with that of femtosecond laser-excited plasma, and the increase of the plasma temperature in the case of nanosecond laser was more evident. In addition, there was a significant difference in electron density between femtosecond and nanosecond laser-induced plasmas. The electron density for femtosecond laser decreased with increasing the target temperature, while for nanosecond laser, the electron density was almost unchanged at different sample temperatures.     

壳程轴流型换热器的优化研究

提出了壳程轴流型换热器的优化目标函数,分析了最优化条件的存在性,并对三种矩形排列的光滑管、缩放管以及花瓣管的优化程度进行了传热性能的研究,与所得实验结果进行了对比,两者结论一致。研究表明：对于相同排列的三种管子,花瓣管的目标函数最小,缩放管次之,光滑管最差;对于同一种管子,22mm×28mm排列最优,22mm×26mm排列次之,22m×m24mm排列最差.     

能耗和时延感知的虚拟化云无线接入网络资源分配机制

针对现有虚拟化云无线接入网络(C-RAN)资源利用率低、能耗高、用户服务质量无法得到保证等问题,该文提出一种能耗和时延感知的虚拟化资源分配机制。根据虚拟化C-RAN的网络特点及业务流量特征,考虑资源约束和比例公平,建立能耗和时延优化模型。进而,利用启发式算法为不同类型虚拟C-RAN和用户虚拟基站分配资源,完成资源的全局优化配置。仿真结果表明,所提资源分配机制在提高网络资源利用率的同时,不但使能耗节省了62.99%,还使时延降低了32.32%。