Late Carboniferous-Early Permian Mafic-Ultramafic Complexes in Beishan,Southwestern Central Asian Orogenic Belt and Their Significance

正Numeral Permian mafic-ultramafic complexes occur in the Beishan terrane atthe northeastern margin of the Tarim craton,southwestern Central Asian Orogenic Belt,including the Pobei,Cantoushan,Bijiashan,Hongshishan,Xuanwoling,Zhongposhan and Luodong etc.,intrusions (Qin et al.,2011;Zhang et al.,2017;Xue et al.,2018).These Beishan mafic-ultramafic complexes are composed of peridotite,pyroxenite,troctolite and gabbro with significant cumulate rhythmic layers of magmatic     

Study on the development and utilization prospection of shallow geothermal energy of saline underground water in Northern Shandong Plain

In order to provide a way to expand clean heating energy and promote the utilization scale of groundwater heat pump system, the authors focused on the widespread saline water body in the study area, based on the stratigraphic characteristics of Quaternary strata. The distribution patterns of sand and saline water body of Quaternary were analyzed, and the pumping tests and reinjection hydrogeology tests from four previous shallowing geothermal energy exploration projects were summarized. The results show that the yield of a single well is 320-475 m³/d in saline water layers, with the unit yield of 12.76-28.3 m³/(d·m). And the natural reinjection rate is 30-56 m³/d, with the unit reinjection of 5.85-17.5 m³/(d·m). The total allowable heating floor area is 3 481.02 m² for one well, which could satisfy the heat load of 35 rural houses in winter. The groundwater heat pump system is preferable in the shallow geothermal development in the study area, while the scatter distributed ground-coupled heat pump system is optional for single rural building with less energy need for space heating/cooling.     

中强震前新沂台地电阻率和短水准异常及其相关性的研究

对1995-2002年新沂台地电阻率和短水准进行对比分析,表明它们之间存在一定的相关性;同时在中强震之前,两者都有一定的异常与之对应。其相关性和地震对应性表明：由于是同场地观测,所受力源相同,造成异常变化量基本相同;但由于两者对应力变化反应结果不同,造成其异常出现存在不同程度的相位差,地电阻率出现的异常基本上早于短水准的异常。     

倾斜椭圆形裂纹的三维始裂状态

基于断裂力学理论,采用最大拉应力准则分析了压剪和拉剪应力状态下倾斜椭圆形裂纹的三维始裂状态.研究结果表明:(1)椭圆形裂纹的三维始裂位置受周边应力场的影响:在拉剪状态下,原生裂纹的始裂位置始终在裂纹短轴端部,而与原生裂纹的几何形状(b/a)和材料泊松比(v)无关,而在压剪状态下则受b/a和v的共同影响,并随b/a和v的...     

Deriving Temporal and Vertical Distributions of Methane in Xianghe Using Ground-based Fourier Transform Infrared and Gas-analyzer Measurements

Methane(CH4) is one of the most important greenhouse gases in the atmosphere, making it worthwhile to study its temporal and vertical distributions in source areas, e.g., North China. For this purpose, a ground-based high-resolution Fourier transform infrared spectrometer(FTIR), the Bruker IFS 125 HR, along with an in-situ instrument, the Picarro G2301, were deployed in Xianghe County(39.8°N,117.0°E), Hebei Province, China. Data have been recorded since June2018. For the FTIR measurements, we used two observation modes to retrieve the mole fraction of CH4: the Total Carbon Column Observing Network(TCCON) method(retrieval algorithm: GGG2014), and the Network for the Detection of Atmospheric Composition Change(NDACC) method(retrieval algorithm: SFIT4). Combining FTIR with in-situ measurements, we found the temporal and vertical distributions of atmospheric CH4 within three vertical layers(near the ground, in the troposphere, and in the stratosphere), and throughout the whole atmosphere. Regarding the diurnal variation of CH4 near the ground, the concentration at night was higher than during the daytime. Regarding the seasonal variation,CH4 was low in spring and high in summer, for all three vertical layers. In addition, there was a peak of CH4 in winter near the ground, both in the troposphere and the whole atmosphere. We found that variation of CH4 in the tropospheric column was close to that of the in-situ measurements near the ground. Furthermore, the variations of CH4 in the stratospheric column could be influenced by vertical motions, since it was higher in summer and lower in winter.     

山药多糖提取分离工艺的研究

通过正交实验对山药多糖的热水浸提和分离方法进行了研究,得到的工艺优化参数为:浸提时间是90 min,浸提温度90℃,料水比为1:5 g/mL。借助微波辅助提取和超声波辅助提取方法,可得到更高的产率。比较了Sevage法及三氯乙酸沉淀法,结果表明用Sevage法进行山药多糖脱除蛋白质效果更好。     

集成波能转换功能的方箱—挡浪板式浮式防波堤水动力特性研究

浮式防波堤与振荡浮子式波浪能转换装置集成是一种较为合理的波浪能开发利用方式,基于方箱式浮式防波堤—波浪能转换集成系统和幕帘式防波堤的研究成果,提出了一种新型方箱—垂直挡浪板式浮式防波堤—波浪能转换集成系统,建立数学模型对该集成系统的水动力特性和能量输出特性进行研究。模型基于N-S方程,采用紧致插值曲线(CIP)方法结合浸没边界法(IBM)求解。运用数值模型探究在一定波浪条件下,动力输出系统(PTO)阻尼力的大小以及挡浪板对集成系统的水动力特性和能量转换特性的影响,得到如下结论:集成系统的俘获宽度比随PTO阻尼力的增大呈现先增大后减小的趋势,在阻尼力F_(PTO)=150 N时达到最大;相对于方箱型集成系统,增设0.1 m挡浪板后可使其最大俘获宽度比η_e提高33%左右;此外,集成系统的俘获宽度比随挡浪板长度增加而增大,增长趋势逐渐变缓,在挡浪板长度S_p=0.5 m时达到最大,此时俘获宽度比η_e=0.563 1。     

西藏措勤盆地下白垩统碳酸盐岩储层特征及评价

本文是以措勤盆地碳酸盐岩为研究对象,利用野外地质实测资料和室内分析化验资料,分析碳酸盐岩储层的岩性特征、储集空间、储层类型、储集性能。对朗山组、川巴组的碳酸盐岩储层进行了评价。认为郎山组厚度大,溶蚀、裂缝发育,在区域上相对稳定,是该区的重点储层,多巴组的储层次之。以此弥补该地区的碳酸盐岩储层研究的空白。     

基于气候性温盐关系模型对Argo数据进行质量控制的研究

通过全球Argo计划的实施,我们获得了大量的温盐剖面数据。如果对浮标所在洋区的状况不是很了解,很难判断Argo浮标电导率传感器的工作状态及盐度数据的可靠性。为了避免错误的数据,必须对Argo进行有效的质量控制。国家海洋信息中心根据西北太平洋海区的南森站和CTD温盐数据,建立了高质量的气候学温盐数据集,对投放在西北太平洋海区的Argo浮标数据进行了相应的质量控制。结果表明,利用Argo浮标所在海区的气候学数据对Argo数据进行质控是比较有效的方法之一。     

A Novel VOF-Type Volume-Tracking Method for Free-Surface Flows Based on Unstructured Triangular Mesh

A novel VOF-type volume-tracking method for two-dimensional free-surface flows based on the unstructured triangular mesh is presented. Owing to the inherent merit of the unstructured triangular mesh in fitting curved boundaries, this method can handle the free-surface problems with complex geometries accurately and directly, without introducing any complicated boundary treatment or artificial diffusion. The method solves the volume transport equation geometrically through the Modified Lagrangian-Eulerian Re-map （MLER） method, which is applied to advective fluid volumes. Moreover, the PLIC method is adopted to give a second-order reconstructed interface approximation. To validate this method, two advection tests were performed for the establishment of the accuracy and convergence rate of the solutions. Numerical results for these complex tests provide convincing evidence for the excellent solution quality and fidelity of the method.