明末清初来华传教士翻译活动特点及其影响因素

明末清初,西方来华传教士将翻译作为“学术传教”的一种手段,将大量的西方宗教和科技著作译介入中国,同时将中国古代典籍和文献著作等输出至西方,形成了“西学东渐”和“东学西传”并存的局面。客观上,这是中西方政治、经济和文化的发展的必然结果;主观上,这与传教士自身的人格魅力和知识素养有着紧密的联系。     

四川盆地下二叠统,上三叠统水动力场与天然气保存

下二叠统和上三叠统储集层是四川盆地油气主力产层。在对其水动力场控制因素分析研究的基础上，对实测地层压力资料进行数据处理，分别建立了Ｐ１和Ｔ３地层压力预测模型。地层埋深，孔隙度，构造抬升率和褶皱强度等为现今水动力场的主要控制因素，其中地层埋深对地层压力的影响最大。     

信息时代下经济社会用水影响因素探讨

信息时代下经济高速发展,居民生活用水量不断提高,信息技术不断进步,工业企业发展步伐加快,作为经济社会用水的两个主要部分,对水资源的需求日益增加。通过对居民生活用水需求影响因素及工业用水利用效率影响因素的定性分析,以探究信息时代下经济社会用水的相关情况,为缓解水资源短缺提出建议。     

Geochemical characteristics of the Permian marine mudstone and constraints on its provenance and paleoenvironment in the Fenghai area, Fujian Province, southeastern China

Permian marine strata have gradually become a research focus in the world. The marine strata of the Late Permian Dalong Formation (P₃d) in the Fenghai area, Fujian Province, have become more and more important as their geochemical characteristics record important geological information and are a good indicator for recovering and reconstructing the paleosedimentary environments and tectonic attributes. The major elements, trace elements and rare earth elements were analyzed by XRF and ICP-MS, respectively. Based on the results of detailed field geological surveys, profile measurements as well as typical sample collection, the tectonic setting and provenance of Permian marine mudstone were comprehensively discussed. The results showed that the Dalong Formation (P₃d) was deposited in an active continental margin tectonic environment as revealed by the relation between Fe₂O₃ + MgO and TiO₂ and Al₂O₃/SiO₂. The fingerprint characteristics of Mn, Fe, Co, Ni and REE and the ratio of U/Th, V/Cr, Sr/Ba, (La/Yb)_N and V/(V + Ni) indicated that the sedimentary provenance was mainly derived from potassium feldspar, followed by muscovite. Sedimentary water bodies showed a gradually decreasing depositional rate trend, water depth gradually shallowing and paleo-salinity and productivity gradually increasing. Moreover, since transient delamination occurred during sedimentary processes, sedimentary water bodies showed obvious neritic characteristics. It was consistent with the results revealed by lithological and geochemical characteristics. Calcareous mudstone and siltstone transitioned into fine sandstone from bottom to top, indicating paleo-water bodies became shallow. The research results provided good reference and guidance for understanding Permian paleo-sedimentary environments and tectonic attributes of the Yong’an area, Fujian Province, southeastern China.     

中中新世以来南海南部前隆的迁移:来自北康盆地的证据

利用二维地震资料探讨南海南部北康前隆的迁移现象及其对形成油气圈闭的影响。在南沙海域，早中新世不整合（EMU）是一个区域性不整合面，EMU之上的地层可以简单归结为披覆层系和水平层系。披覆层系直接覆盖在EMU上，具有连续薄层的平行地震反射特征，向南东方向加厚，属于悬浮沉积；而水平层系同期充填在低凹处，不断上超和覆盖早期的披覆层系，厚层状，呈不连续或弱反射特征，属于浊积物与悬浮物的混合沉积。通过上超反射终止的迁移和披覆层系的加厚两个特征判断，中中新世以来北康前隆在向上隆升的同时不断向南东方向迁移，反映了南沙海域减薄的陆壳有一个强烈挠曲和均衡反弹过程。前隆的迁移留下了一系列的古潜山，披覆层系和水平层系是很好的盖层，有利于圈闭的形成。     

鄂尔多斯盆地南部上古生界烃源岩生排烃特征及天然气勘探潜力

针对鄂尔多斯盆地南部上古生界不同类型烃源岩生烃贡献不明确的问题,利用生烃动力学研究方法,考虑不同岩性烃源有机质品质差异、岩石物性、吸附能力等因素,评价了鄂尔多斯盆地南部上古生界煤岩和炭质泥岩的生烃特征。综合煤岩、炭质泥岩在南部的厚度分布,绘制了鄂尔多斯盆地南部上古生界煤岩、炭质泥岩生烃强度、排烃强度图。结果显示,鄂尔多斯盆地南部上古生界在煤层分布局限的情况下,炭质泥岩是主力烃源岩,这与前人仅根据地球化学特征参数而得出南部煤岩为主力烃源岩的认识有很大不同。相关认识对今后盆地南部下古生界天然气勘探开发具有重要的指导意义。     

Closed-form solutions for key performance measures of packet multiplexers with finite capacity queue

We revisit the packet multiplexer with a discrete-time single server queue of limited capacity, and we derive a set of exact closed-form solutions for the major performance measures, such as the distributions of queue length, waiting time and number of lost packets per arriving batch. Assuming equally utilised inputs, the results refer to batch arrivals of binomial and Poisson distributed size, whereas they generally hold for systems with two inputs. The analysis is based on both the commonly used Early Arrival and Late Arrival queueing models, and we show that these models are equivalent at any capacity in terms of both waiting time and loss probability if the Late Arrival queue can hold one additional packet compared to its Early Arrival counterpart.     

2D BASIN MODELLING IN THE EASTERN VARISCAN FOLD BELT (CZECH REPUBLIC): INFLUENCE OF THRUSTING ON PATTERNS OF THERMAL MATURATION

This study evaluates the geothermal history of Palaeozoic sedimentary rocks from the easternmost part of the Variscan external zone in the NE Czech Republic. The objective was to investigate the geothermal history of pre‐Variscan Palaeozoic carbonates in the study area, and to assess its relationship with that of the overlying Variscan flysch. In the study area, the Palaeozoic succession occurs at the surface or is overlain by Miocene sediments of the Carpathian Foredeep. Palaeozoic nappes and the main Variscan overthrust have been documented in the subsurface at the deep Pot?tát‐1borehole. Vitrinite reflectance measurements on 38 samples from the Pot?tát‐1 well and 19 samples from nearby surface outcrops and shallow boreholes were available. A 2D thermal model was created using PetroMod and the thermal maturity evolution was modelled by EASY%Ro. The thermal model was constructed based on interpretations of two NW‐SE seismic profiles (lines 5/83 and 5/84) oriented perpendicular to the main Variscan thrusts. The results were calibrated using measured vitrinite reflectance and were adjusted with 1D models from three shallow boreholes. At the Pot?tát‐1 borehole, modelled maximum palaeo‐temperatures of the Variscan flysch (Moravice Formation) ranged from 310°C at a depth of 7.3 km (the top of the preserved succession) to 395°C at the base of the succession, resulting in thermal maturities of >4%R_r. Peak maturation occurred prior to the end of Variscan thrusting. Modelling suggests that the basal heat flow for these thrust units reached a maximum value of 63 mW/m² at 325 Ma. In addition, the modelling suggests that the maturity of the Palaeozoic carbonates was controlled by the thickness of the overlying Variscan flysch nappes. Maximum palaeo‐temperatures for the Palaeozoic carbonates ranged from 265°C at the top of the interval (at a depth of 7.1 km) to 290°C at the base, resulting in a maturity of 3.8 to >4%R_r which is within the dry gas window. The study suggests that basal heat flows in the original (pre‐thrust) Early Carboniferous sedimentary basin were slightly higher than those in the post‐thrust location for the Variscan flysch nappes. This should be taken into account when evaluating the petroleum system in the South Moravian oil province (SW Czech Republic) where a complete sedimentary sequence has not been preserved.     

成像测井新技术在川西须二段储层评价中的应用

川西地区须家河组二段埋深近5000 ｍ，储层为特低孔渗的裂缝性致密碎屑岩储层，测井评价的难点主要是流体性质识别和裂缝及有效性评价。文章通过实例展示了声波含气性检测技术在气层识别中的应用，利用斯通利波能量衰减和流体移动指数可以进行储层的渗透性分析，成像测井与常规测井结合可进行裂缝识别和裂缝有效性评价；总结了将测井新技术与常规测井结合进行致密碎屑岩储层评价的过程，认为应在准确划分储层类型的基础上进行流体性质识别和裂缝及有效性分析；客观分析了现代测井技术在致密碎屑岩储层评价中的适用性，认为成像测井基本解决了裂缝识别及裂缝有效性评价问题，流体性质的识别技术仍是测井在裂缝性致密碎屑岩储层评价领域的难点。     

赤水地区官南构造须4段气藏裂缝预测

从贵州赤水地区官南构造现今构造形迹特征入手，利用数值分析技术，模拟计算该地区须4段气藏岩体的古构造应力场和破裂接近程度系数（η）；将η与实际资料和野外观测结果对比，确定不同裂缝发育级别及其对应的η值；文章利用此标准，结合岩石力学与构造地质学理论、野外裂缝观测结果、以及实际生产资料，对官南构造裂缝发育程度、裂缝类型及产状进行综合预测。结果表明：须四段裂缝较发育，主要分布在官南构造翼部高陡带、长轴、鞍部、鼻突及断裂带区域裂缝共有2期5组；裂缝的主要方位为东西向、北东向和北西向；裂缝类型以高角度共轭剪切缝和张性缝为主；晚期裂缝较早期更加发育。