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混合整数最小二乘在GPS定位中的应用

目前针对载波相位双差观测模型中具有整型和浮点型两类参数的特点,常用的方法是先将混合整数最小二乘估计转换为整数最小二乘估计,并以此为准则搜索确定整周模糊度,然后回代解算基线向量。这里提出了一种基于混合整数最小二乘对两类参数同时估计的方法;推导了在未知参数具有先验信息的条件下混合整数最小二乘及整数最小二乘的参数估计准则。最后给出算例验证了基于混合整数最小二乘的参数估计的正确性和优越性。     

南汀河西支断裂深浅构造特征——来自深地震反射剖面的证据

云南省西南部,发育一组由不同断裂组成的北东向断裂构造带,沿这些断裂数十年来相继发生过多次强震.本文以其中的南汀河西支断裂为研究对象,采用深地震反射剖面方法,获得了断裂及两侧地壳精细结构和构造图像.探测结果表明:研究区纵向上,分为上、下两层地壳结构,总厚度约为31.25~35.6 km;横向上,以南汀河西支断裂为界,两侧反射特征差异较大,分别以弧状或倾斜反射波组为主·测线经过地区,莫霍面反射特征较为清晰,为2-3个反射同相轴组成的反射条带.南汀河西支断裂为一个由5条分支断层组成的断裂带,呈花状结构,反映了一种走滑挤压的应力状态.断裂带下方,存在一条切穿下地壳及莫霍面并延伸至上地幔的深大断裂·这种深、浅断裂共存的构造格局是控制南汀河地区地震孕育和发生的重要因素之一.     

太行山中段西石门金矿成矿作用与找矿潜力分析

西石门金矿与石湖金矿同属于同一矿田,位于石湖金矿东南方向同一构造带上。石湖金矿仅101、116号两条矿脉提交黄金储量22.28t,随着采矿的深入(600～180m)及深部勘探(危机矿山项目勘探至180～-33m),表明从上至下,具有金矿脉体变宽、质量分数变富的趋势,金矿的储量已经超过30t。那么,与石湖金矿位于同一个构造带上的西石门金矿前景如何呢?本文从成矿地质背景、矿床地质特征、成矿物质来源等方面将西石门金矿与石湖金矿进行了对比研究,结果表明它们在以上诸多方面具有很多相似之处,其成矿作用可以类比。因此,西石门金矿外围和深部找矿的潜力很大,应在搞好矿田构造解剖的基础上部署找矿勘探。同时对区域上的地质找矿工作亦具有摘要的指导意义。     

华熊亚热柱-幔枝构造体系及其控矿作用

文章讨论了华(山)-熊(耳山)地幔亚热柱范围内形成的小秦岭、崤山、熊耳山、鲁山等幔枝构造,以及幔枝构造的形成、演化及其与成矿的关系.总结出Au-Ag-Mo-多金属和Mo-W-Fe-Au-多金属等2个成矿系列.尽管研究区展布有石英脉型、构造蚀变岩型、斑岩型等不同类型的热液型矿床,但它们均受幔枝构造活动制约,进而较好地解释...     

西风南支与高原季风环流场下青藏高原大气边界层结构研究

利用第二次青藏高原(下称高原)综合科考"地-气相互作用与气候效应"立体综合加强期观测试验2019年5月、7月和10月珠峰、林芝、那曲和狮泉河站点的探空资料及ERA5再分析资料.探讨在西风南支与高原季风不同风场控制下高原大气边界层结构特征及其与感热潜热通量的关系.结果表明:西风南支风场下各站点大气边界层高度较高原夏季风风...     

福建德化——永泰巨型环状火山构造成因探析

在浙闽粤中生代火山喷发带中段的德化-永泰巨型环状火山构造,主要由晚侏罗世-白垩世火山岩和侵入岩等组成,具有幔枝构造的岩浆-变质岩系、盖层拆离滑脱上叠构造断陷-火山盆地等基本特征,其形成和海陆过渡带中的地幔柱之幔枝构造有关。     

The branch-cut quantum gravity with a self-coupling inflation scalar field: The wave function of the Universe

This paper focuses on the implications of a commutative formulation that integrates branch-cutting cosmology, the Wheeler–DeWitt equation, and Hořava–Lifshitz quantum gravity. Building on a mini-superspace structure, we explore the impact of an inflaton-type scalar field on the wave function of the Universe. Specifically analyzing the dynamical solutions of branch-cut gravity within a mini-superspace framework, we emphasize the scalar field's influence on the evolution of the evolution of the wave function of the Universe. Our research unveils a helix-like function that characterizes a topologically foliated spacetime structure. The starting point is the Hořava–Lifshitz action, which depends on the scalar curvature of the branched Universe and its derivatives, with running coupling constants denoted as $g_i$. The corresponding wave equations are derived and are resolved. The commutative quantum gravity approach preserves the diffeomorphism property of General Relativity, maintaining compatibility with the Arnowitt–Deser–Misner formalism. Additionally, we delve into a mini-superspace of variables, incorporating scalar-inflaton fields and exploring inflationary models, particularly chaotic and nonchaotic scenarios. We obtained solutions for the wave equations without recurring to numerical approximations.     

The branch-cut quantum gravity with a self-coupling inflation scalar field: Dynamical equations

This article focuses on the implications of the recently developed commutative formulation based on branch-cutting cosmology, the Wheeler–DeWitt equation, and Hořava–Lifshitz quantum gravity. Assuming a mini-superspace of variables, we explore the impact of an inflaton-type scalar field $\varphi (t)$ on the dynamical equations that describe the trajectories evolution of the scale factor of the Universe, characterized by the dimensionless helix-like function ${\ln }^{-1}[\beta (t)]$. This scale factor characterizes a Riemannian foliated spacetime that topologically overcomes the big bang and big crunch singularities. Taking the Hořava–Lifshitz action as our starting point, which depends on the scalar curvature of the branched Universe and its derivatives, with running coupling constants denoted as $g_i$, the commutative quantum gravity approach preserves the diffeomorphism property of General Relativity, maintaining compatibility with the Arnowitt–Deser–Misner formalism. We investigate both chaotic and nonchaotic inflationary scenarios, demonstrating the sensitivity of the branch-cut Universe's dynamics to initial conditions and parameterizations of primordial matter content. The results suggest a continuous connection of Riemann surfaces, overcoming primordial singularities and exhibiting diverse evolutionary behaviors, from big crunch to moderate acceleration.