山东省地震台网中心网站建设

主要介绍了山东省地震中心网站的页面栏目设计和页面具体内容,介绍了网站的具体功能,以及网站制作的技术与方法,通过访问该网站可以了解到山东省地震台网中心的各种信息,并且能够查询到山东省2002年以来大于2.0级的地震.     

西藏马攸木金矿床金银互化物的赋存状态

马攸木金矿床是西藏近年发现的首例规模较大、矿石品位富、金成色高的岩金矿床.作者通过对马攸木金矿床矿石组构、矿石共生组合及矿物特征研究发现,金银互化物主要有自然金、含银自然金、银金矿、自然银.载金矿物为黝铜矿、针铁矿、脆硫锑铅矿及石英;金银互化物的赋存形式主要为包裹体金、裂隙金及粒间金.金银互化物的形成、富集与热液成矿作用及表生风化作用关系密切.     

Detection of a high-confidence quasi-periodic oscillation in radio light curve of the high redshift FSRQ PKS J0805–0111

In this work,we have searched for quasi-periodic oscillations(QPOs)in the 15 GHz light curve of the FSRQ PKS J0805-0111 monitored by the Owens Valley Radio Observatory(OVRO)40 m telescope during the period from 2008 January 9 to 2019 May 9,using the weighted wavelet Z-transform(WWZ)and the Lomb-Scargle Periodogram(LSP)techniques.This is the first time to search for a periodic radio signal in the FSRQ PKS J0805-0111 by these two methods.Both methods consistently reveal a repeating signal with a periodicity of 3.38±0.8 yr(>99.7%confidence level).In order to determine the significance of the periods,the false alarm probability method was applied,and a large number of Monte Carlo simulations were performed.As possible explanations,we discuss a number of scenarios including the thermal instability of thin disks scenario,the spiral jet scenario and the binary supermassive black hole scenario.We expect that the binary black hole scenario,where the QPO is caused by the precession of binary black holes,is the most likely explanation.FSRQ PKS J0805-0111 thus could be a good binary black hole candidate.In the binary black hole scenario,the distance between the primary black hole and the secondary black hole is about 1.71×10¹⁶ cm.     

海南岛4—9月短时强降水的天气型和环境参数特征

利用海南岛加密自动站逐小时降水资料、ERA5再分析资料,对海南岛短时强降水日环流配置进行了天气学分型,并进一步探讨了各天气型下海南岛短时强降水的时空分布、环流形势和关键环境参数特征。结果表明：(1)海南岛短时强降水有明显的日变化特征,呈单峰型,主要出现在15:00—19:00。(2)海南岛短时强降水的天气型主要有南海低压槽、华南沿海槽、西南低压槽和冷锋型。(3)南海低压槽、华南沿海槽、西南低压槽和冷锋型短时强降水分别占37%,31%,16%和16%。南海低压槽和华南沿海槽型主要出现在7、8和9月;西南低压槽型除9月外,其余各月份均可能出现;冷锋型绝大多数出现在4、5月。(4)南海低压槽和华南沿海槽型整层湿度条件都较好,不稳定能量较大,垂直风切变较弱。西南低压槽型不稳定能量较大,湿度条件一般,垂直风切变较弱。冷锋型存在明显的上干下湿特征,垂直风切变最大,0～6 km风速差75%分位大于10 m/s,不稳定能量最小。     

Simulating the effect of hydrate dissociation on wellhead stability during oil and gas development in deepwater

It is well known that methane hydrate has been identified as an alternative resource due to its massive reserves and clean property. However, hydrate dissociation during oil and gas development (OGD) process in deep water can affect the stability of subsea equipment and formation. Currently, there is a serious lack of studies over quantitative assessment on the effects of hydrate dissociation on wellhead stability. In order to solve this problem, ABAQUS finite element software was used to develop a model and to evaluate the behavior of wellhead caused by hydrate dissociation. The factors that affect the wellhead stability include dissociation range, depth of hydrate formation and mechanical properties of dissociated hydrate region. Based on these, series of simulations were carried out to determine the wellhead displacement. The results revealed that, continuous dissociation of hydrate in homogeneous and isotropic formations can causes the non-linear increment in vertical displacement of wellhead. The displacement of wellhead showed good agreement with the settlement of overlying formations under the same conditions. In addition, the shallower and thicker hydrate formation can aggravate the influence of hydrate dissociation on the wellhead stability. Further, it was observed that with the declining elastic modulus and Poisson’s ratio, the wellhead displacement increases. Hence, these findings not only confirm the effect of hydrate dissociation on the wellhead stability, but also lend support to the actions, such as cooling the drilling fluid, which can reduce the hydrate dissociation range and further make deepwater operations safer and more efficient.     

甘青地区马家窑文化彩陶贸易及其动力探讨

马家窑文化是甘青地区仰韶文化晚期阶段一个重要的文化遗存类型,其以精美的彩陶闻名于世,对于马家窑文化彩陶的交流传播研究受到了学术界的广泛关注。本文运用X-荧光光谱分析法对甘青地区5个典型马家窑文化早期阶段遗址出土的92件彩陶陶片样品和各遗址附近采集的42份红粘土及黄土样品进行化学元素组成分析,追溯彩陶的产源地及贸易。同时基于陶器的起源传播理论,收集整理马家窑文化区遗址出土的粟（Setaria italica）、黍（Panicum miliaceum）农作物以及动物骨骼遗存鉴定资料,探讨马家窑彩陶贸易的动力。Ti/Al-Na/K和主成分分析结果显示宗日文化区宗日遗址的马家窑文化彩陶元素组成特征和马家窑文化主体区域的彩陶一致,表明宗日遗址马家窑类型彩陶是从马家窑文化主体区域贸易而来;马家窑文化彩陶的传播和该地区粟黍农作物的交流传播具有时空一致性,粟黍农业人群沿黄河上游谷地向共和盆地的扩散带来了新的文化元素;宗日文化区和马家窑文化核心区生业模式的差异带来了跨区域间文化交流的动力,这也可能是马家窑文化彩陶贸易的动力。

     

存储局域网(SAN)在地质调查数据存储中的应用

对中国地质调查局数据存储原有状况和存在的问题进行总结,在对数据存储技术进行分析的基础上,详细论述了基于SAN结构的地质调查存储系统的技术方案,包括基础结构,软、硬件配置等内容。系统满足了各项业务对数据的高可用性、数据存储的可靠性、数据的安全性日益增高的需求。系统运行后,取得了较为满意的应用效果。     

张北6.2级强震前易县台地形变临震异常

河北省易县地震台DSQ型水管倾斜仪NE向2022年2月14日以来观测数据曲线出现趋势下降E倾变化,年变观测数据曲线不同于往年。对该异常进行了分析,并结合三维集中荷载模型模拟计算结果表明：2022年2月14日—4月6日旺隆水库共泄流总库容量达到279.5万m³,造成倾斜变化理论值为1.27×10⁻⁷,高于倾斜干扰的限定指标1.455×10⁻⁸一个量级,推测旺隆水库泄流荷载是造成易县台水管仪NE分量加速异常变化的主要因素。     

2000年姚安M_S6.5地震震源破裂过程研究

利用从IRIS上获取的11个台站震相清晰的P波波形记录资料对2000年姚安MS6.5地震的震源破裂过程进行了反演,结果表明:(1)地震破裂持续时间为5.6s,破裂主要集中在破裂开始0.2s后的时间段内,由两次2s多的破裂组成,而且后一次破裂的强度超过了前一次;(2)静态滑动位移和应力降分布图均显示存在震中区和震中以东区两个变化比较明显的区域,破裂沿北西向断裂进行。     

几种花青染料的合成及分离

研究了Ｎ甲基对二甲胺基苯乙烯吡啶碘盐系列化合物的合成、分离方法,通过可见吸收、ＭＳ谱、ＨＮＭＲ 谱及氮素测定分析产物,证实了其结构和理论预期的一致性