低水泥浇注料在均热炉上的应用

介绍了低水泥浇注料的性能以及在马钢均热炉上的应用。结果表明：均热炉整体浇注中，锚固砖的安装、膨胀缝的留设以及在200℃以下烘烤4天的20Pa压力操作是关键。     

实验药包爆炸应力波测试技术探讨

用压电晶体压力传感器测定实验药包在介质中产生的爆炸应力波,没有反映冲击能（E_）和膨胀能（E_b）对介质进行加载的实际情况。本文指出电阻应变传感器具备记录压缩相和拉伸相的能力,认为超动态应变测试系统适宜于测定爆炸应力波,并给出了用该系统对爆炸应力波进行测定的结果。     

Practicability and Limitations of Finite Element Simulation of the Dilation Behaviour of Coronary Stents

After first implantation of a metallic stent into cardiac vessels in 1986 stent implantation has become a standard technique for treatment of coronary heart disease. During implantation of balloon‐expandable stents, the structure of the stent undergoes high plastic deformation. Despite the fact, that stents are used for more than 15 years nearly no information about the mechanical and micro structural process during dilation are known. The present paper presents a detailed study and comparison of the experimental and the simulated expansion behaviour of metallic stents. Used material models are discussed and crystallographic details are presented. Dilation curves describe the behaviour of balloon‐expandable coronary stents. The dilation behaviour depends on both the materials properties and the design of the stent. A numerical simulation of the dilation process by means of FE is suitable. A comparison of the experimental measurement and the numerical simulation demonstrates, that a Cauchy stress‐strain material model should be used for numerical simulations. A local failure criterion is introduced, which considers void initiation as a criterion for mechanical failure.     

氢氧化铝填充聚烯烃复合材料拉伸体积膨胀的研究

利用液体静力平衡法测量了复合材料的拉伸体积膨胀率并以SEM表征了材料的结构。研究发现复合材料的拉伸体积膨胀率与材料中所填充的填料体积分数成正比，其拉伸体积膨胀因子则与基体与填料的相容性有关。     

Statistical study of the spindle dilatation phenomena—Application to a NC lathe

Spindle dilatation in one of the most important causes of defects on parts machined on CNC lathes. Experiments and models have been established to determine the average value of the spindle's dilatation. The problem of determination of confidence interval associated to those predictions remains open. If the average value of dilatation can be estimated, any existing model can predict how near or far from the average value will be the spindle's dilatation. This work deals with the problem of type of dilatation measures repartition. A Khi-2 test done on dilatation measures reveals that dilatation measures spread under a normal repartition law. So, a model to determine the confidence interval associated to the dilatation prediction is presented. The repartition law of the samples of dilatation allows to set up this model. Then, a method to calculate an upper bound of the standard deviation of the dilatation repartition law is proposed. The model proposed can be used to determine the confidence interval of spindle dilatation phenomenon. This determination allows a useful prediction of the dilatation because of the confidence interval that can now be associated to the prediction.     

一种基于大数据回归分析的LTE流量 预测及扩容方法研究

本文详细介绍了一种LTE网络业务量各时间维度的预测方法,引入O+B域建立用户画像,结合大数据建立LTE网络预测模型,对LTE网络未来小区内用户数、业务量等数据进行预测,同时可以把控网络局部短期变化,从而支撑快速优化调整应对。基于用户感知建立不同场景下扩容标准,预估网络资源。     

Abnormal expansion due to pearlite-to-austenite transformation in high aluminium-added steels

Addition of alloying elements usually moves eutectoid point to left whilst aluminium enhances eutectoid carbon content. The carbon expands lattice parameters of austenite. High aluminium addition in steels led to volume expansion at pearlite-to-austenite transformation since specific volume of austenite is larger than that of mother phases, which is proposed to determine the volume expansion or contraction. It has been proven by calculations based on thermodynamics as well as accurate experimental observations of dilatometry study.     

RELAXATION OF ASPHALTENES AT THE TOLUENE/WATER INTERFACE: DIFFUSION EXCHANGE AND SURFACE REARRANGEMENT

Upon adsorption at the oil/water interface, asphaltenes slowly form a glassy interphase. This robust, asphaltene-rich interphase is likely the reason for prolonged stability of crude oil/water emulsions and for the propensity of asphaltenic crude oils to alter the wettability of reservoirs. Here we adopt interfacial dilatation rheology using the oscillating pendant drop with axisymmetric drop shape analysis (ADSA) to investigate the relaxation mechanisms of asphaltenes adsorbed at the toluene/water interface. We compare classical viscoelastic models with the measured rheologic data and find that the frequency response of the dilatational moduli fits a combination of diffusion-exchange and surface-rearrangement mechanisms. The combined relaxation model is verified by solvent washing the asphaltenes from the interface and measuring the dilatational response of the resulting irreversibly adsorbed species. After washout, the oil-phase diffusion component of the frequency response disappears, and the relaxation time of the adsorbed film increases by an order of magnitude. Since the studied asphaltenes prove insoluble in the synthetic aqueous brine (pH?=?8.0), this result suggests that reversibly exchanging species in the oil phase weakens an interconnected asphaltene-gel/glass phase at the interface. Our experiments show, for the first time, that most of the surface-active asphaltenic molecules are irreversibly adsorbed from the oil phase.     

影响可膨胀石墨爆炸膨化的因素探讨

为研究影响可膨胀石墨爆炸膨化的影响因素,通过测定膨化率以及发烟剂对8mm波衰减值,分析了弹壳材料与壁厚、炸药及可燃剂含量、装药密度、混药工艺、插层物质以及分散方式对膨化效果及对8mm波衰减效果的影响,根据测试结果,优化发烟弹与可膨胀石墨的设计参数.     

RELAXATION OF ASPHALTENES AT THE TOLUENE/WATER INTERFACE: DIFFUSION EXCHANGE AND SURFACE REARRANGEMENT

Upon adsorption at the oil/water interface, asphaltenes slowly form a glassy interphase. This robust, asphaltene-rich interphase is likely the reason for prolonged stability of crude oil/water emulsions and for the propensity of asphaltenic crude oils to alter the wettability of reservoirs. Here we adopt interfacial dilatation rheology using the oscillating pendant drop with axisymmetric drop shape analysis (ADSA) to investigate the relaxation mechanisms of asphaltenes adsorbed at the toluene/water interface. We compare classical viscoelastic models with the measured rheologic data and find that the frequency response of the dilatational moduli fits a combination of diffusion-exchange and surface-rearrangement mechanisms. The combined relaxation model is verified by solvent washing the asphaltenes from the interface and measuring the dilatational response of the resulting irreversibly adsorbed species. After washout, the oil-phase diffusion component of the frequency response disappears, and the relaxation time of the adsorbed film increases by an order of magnitude. Since the studied asphaltenes prove insoluble in the synthetic aqueous brine (pH = 8.0), this result suggests that reversibly exchanging species in the oil phase weakens an interconnected asphaltene-gel/glass phase at the interface. Our experiments show, for the first time, that most of the surface-active asphaltenic molecules are irreversibly adsorbed from the oil phase.