储层岩石矿物成分对酸蚀裂缝导流能力的影响

储层岩石矿物成分是酸压改造效果影响因素之一。研究认为，在储层岩石矿物成分中易溶物的含量及分布方式决定了酸蚀裂缝导流能力大小，易溶蚀物的含量越多，岩石溶蚀速率越快。室内测试了不同溶蚀速率下的灰岩和白云岩的酸蚀裂缝导流能力，研究了岩石溶蚀速率、易溶蚀物含量对酸蚀裂缝导流能力的影响，对酸压工艺设计方案提出了指导性建议。研究结果表明，储层岩石溶蚀速率与酸蚀裂缝导流能力增加倍比存在抛物线关系，易溶蚀物占30%40% 时酸蚀裂缝导流能力保持较好。     

基于ANSYS的热成形模具结构优化

基于冲压成型工艺试验分析系统,针对模具内材料受热膨胀将对模具导向装置及结构造成干涉的问题,利用有 限元分析软件ANSYS对模内温度场进行热力耦合分析,得出各部分材料的热膨胀程度。为基于正向压边模架的模内加 热装置提供可靠的实验参数和热力学设计依据,提高了模具结构设计的合理性,达到优化设计的目的。     

位移边界对2D-FGM板热应力影响研究

考虑不同的位移边界条件,建立了常物性2D-FGM板研究模型,并采用有限元法,得到其冷却瞬态热应力场分布图形。位移边界条件对常物性2D-FGM平面区域冷却瞬态热应力分布影响颇大,在简支和一端固定情况下,2D-FGM板自由边界上的热应力σ_x=0;两端固定情况下,其左右两边界均形成上中下三个应力聚集,应力分布形状和数值都发生了巨大的变化;将四周均设置呈固定约束后,热应力数值增长幅度较两端固定情况时更为明显。此结果为该材料的设计、制备提供了准确的理论计算依据。     

On- and offline detection of structural breaks in thermal spraying processes

We investigate and develop methods for structural break detection, considering time series from thermal spraying process monitoring. Since engineers induce technical malfunctions during the processes, the time series exhibit structural breaks at known time points, giving us valuable information to conduct the investigations. First, we consider a recently developed robust online (also real-time) filtering (i.e. smoothing) procedure that comprises a test for local linearity. This test rejects when jumps and trend changes are present, so that it can also be useful to detect such structural breaks online. Second, based on the filtering procedure we develop a robust method for the online detection of ongoing trends. We investigate these two methods as to the online detection of structural breaks by simulations and applications to the time series from the manipulated spraying processes. Third, we consider a recently developed fluctuation test for constant variances that can be applied offline, i.e. after the whole time series has been observed, to control the spraying results. Since this test is not reliable when jumps are present in the time series, we suggest data transformation based on filtering and demonstrate that this transformation makes the test applicable.     

小畸变参数情况下稳态热晕效应数值分析

根据几何光学近似和小扰动理论,推导了高斯光束热晕效应的解析公式,据此解析公式对准直高斯波束的热晕效应进行了计算。结果表明,热畸变参数越大,热晕效应越强,但是,随着热畸变参数的增大,上述解析公式不再适用。     

高精度高测速双纵模热稳频激光干涉仪研究

现代机械工业的发展使得数控机床和三坐标测量机等的运行速度已经达到1000mm/s,而目前商用外差干涉仪的测量速度不能满足这一要求。为此该文采用长度为206mm、频差约728MHz的普通全内腔He-Ne热稳频激光器为光源,外加带有高频振荡器形成的交流信号进行脉冲计数的信号处理电路,构成高精度高速双纵模热稳频激光干涉仪。通过实验对干涉仪的测量速度和精度进行了验证,其精度达到0.1μm/800mm。实验证明,该干涉仪可以对速度为1000mm/s的运动物体进行位移和速度测量。     

潮汐河道冷却水工程试验研究方法及应用

海湾及潮汐河口的冷却水工程研究近年来普遍受到人们的重视．由于受潮汐影响，其冷却水工程布置及热污染特性较之河道及水库型工程更为复杂．本文以新会电厂为例，详细说明潮汐河道冷却水工程试验研究方法及其排取水口布置形式，对多种布置方案进行对比试验和优劣分析，最终提出合理排取水口布置形式，且给出了电厂取水温升和热污染范围，为设计及环评工作提供了依据．关     

百色盆地第三系烃源岩热模拟特征研究

百色盆地第三系百岗组和那读组湖相烃源岩为混合型。通过2个典型未成熟暗色泥岩样品加水热压模拟实验的液态烃、气态烃产率及组成等对比分析，发现两者存在明显的差异。那读组样品在低成熟～成熟阶段（模拟温度为230～350℃）以液态烃产出为主，其中低熟油的累积产率约占60%的比例。百岗组样品在低成熟阶段液态烃产率略大于气态烃产率，到成熟阶段则以气态烃产出为主。在热模拟的气相产物组成中，那读组样品的气态烃含量随模拟温度升高具有明显的双峰特征。在热模拟液态烃中，C₂₇、C₂₈、C₂₉规则甾烷呈“V”字型分布，C₂₇／C₂₉甾烷比值、姥/植比值和伽马蜡烷含量随模拟温度增加的变化较小，Ts/Tm比值随模拟温度增加的变化幅度较大。     

稠油油藏注蒸汽储层热伤害规律实验研究

针对稠油油藏注蒸汽过程中储层的热伤害问题，研究了稠油油藏热采过程注入的高温、高pH 热流体对储层 渗透率的影响，研究中利用正反向流动实验方法，研究了高温冷凝液注入疏松砂岩后引起的微粒运移作用及储层渗透 率的变化特征；并利用储层矿物的水热反应实验，分析了疏松砂岩油藏注蒸汽开发过程中的微粒运移机理。实验结果 表明，注蒸汽过程中，稠油油藏储层渗透率随温度及pH 值的升高而降低。高速流动的蒸汽及冷凝液造成储层内固相 微粒的运移及滞留，使储层非均质性进一步加剧；同时，高温、高pH 的蒸汽冷凝液既促使黏土矿物发生膨胀又造成储 层矿物发生溶解与转化，从而进一步加剧了稠油油藏疏松砂岩储层的储层热伤害。     

Indoor Climate and Thermal Comfort from a Long-Term Perspective

ABSTRACT

This article discusses how a Swedish wooden burgher house, the mid-1660s Burmeister House, was adapted over the course of 250 years to satisfy ever-changing expectations of thermal comfort. The investigation is based on the climatic conditions of the Nordic Region, where the issue of thermal comfort is crucial when attempting to understand the development of indoor environments. The article explores how spatiality, heating, and interior decor and furnishing operated and affected the inhabitants' experiences of indoor climate and thermal comfort. The results show that Burmeister House followed a general pattern of improvement, especially with regard to innovations in heating. Burmeister House ceased to be a private residence when it was restored and turned into a historic house museum. Rather than revealing its history, restorations carried out in the twentieth century worked to conceal or remove most of the building's more recent history. As a consequence, the house has become more difficult to use since it can no longer be efficiently heated.