The Akp-Btk value method and the results for the retrieval of the parameters of the Earth's free core nutation

The rotation of the Earth's liquid core creates the Nearly Diurnal Free Wobble (NDFW). It is one of the problems of researching the Earth's liquid core for us to retrieve the parameters of the Earth's Free Core Nutation (FCN), from the Earth's liquid core resonance of gravity tide waves on the diurnal frequency band. Since 1987, some scientists in many different countries have come to calculate the parameters of FCN by using the observational data of gravity tide waves on the diurnal frequency band. They basically followed the Stacking method, which needed five diurnal waves for the resolution. In this paper, authors introduced the Akp-Btk value method with clearly geometrical meaning as a new method, which only requires three very high signal-noise-ratio waves O1, K1 and P1 for the resolution. Authors chose the observational data of the three superconducting gravimeter stations respectively located in Cantley of Canada, Wuhan of China and Brussels of Belgium, to compute the parameters of FCN. It was the first time that the observational results of the parameters of FCN obtained from gravitational tide were in accord with the parameters of FCN gained from VLBI since 1987.     

焦家金矿床容矿裂隙特征及成生机制

着重研究构造作用下成矿裂隙特征和流体的运移通道、方式及成因机制,结果认为焦家金矿床差异的矿体矿化特征主要由不同裂隙导致形成,微构造裂隙之间没有截然分开的界线,常呈渐变接触关系。矿化裂隙成生主要有流体驱动显微构造裂隙扩展和构造剪张形成脉状裂隙两种方式。流体运移以真空泵式为主,渗流方式为辅,不同的裂隙成生机制和流体运移方式导致形成差异的矿化特征。     

Effects of dissipation and a liquid core on forced nutations in Hamiltonian theory

In a previous paper, the authors considered the free rotation of an earth model composed of a rigid mantle and a liquid core in the presence of dissipation and under the Hamiltonian formalism, obtaining analytical expressions for the free nutation modes.
In this paper we treat the forced motion. Approximate analytical solutions are worked out by means of Hori's perturbation method, the free solutions obtained in the former paper playing the role of the unperturbed solutions required in the application of the method. These solutions are consistent in the sense that, with the usual terminology, the rigid body solutions and the complex transfer functions are calculated with the same parameters.
Besides in-phase terms, the dissipation at the core–mantle boundary studied in this paper gives rise to out-of-phase terms. From a qualitative perspective, we discuss the issue of the resonance in this context. The presence of dissipation changes dramatically the character of the FCN wobble; that is, it is no longer a regular oscillation but a damped one. A strict resonance phenomenon cannot take place thereby, since the forcing perturbations are oscillations with a real (non-complex) frequency.     

微管径高效液相色谱及其应用

介绍了微管径高效液相色谱法 (microboreHPLC ,μHPLC)及其应用 ,包括 μHPLC的结构特点、优点及其在制药、生物产品、环境监测和临床药物试验中的应用     

试论煤储层气—水两相流系统

根据3种煤层气运移边界类型与7种煤层重力水运移边界类型的组合形式,将煤储层气—水两相流系统划分为3种基本类型,并结合具体实例探讨了不同类型与煤层气产出潜势之间的关系。研究表明,开放型系统中的煤层气和地下水具有运移显著且交替活跃特征,煤层气井产能必然相对较低;半开放型系统的边界条件较为复杂,导致煤储层含气性、煤层气产出潜势变化较大;封闭型系统具有地下水滞流及煤层气被封闭的基本特征,极有利于煤层气的富集高产。      

考虑桩土作用的储罐模拟地震振动台试验

为研究考虑桩土相互作用的储液罐的动力响应及长周期地震波对储液晃动、储罐提离的影响,根据量纲分析法设计了桩-土-储罐模型进行了振动台试验。试验中采用4条基岩波、4条地表波进行振动台试验。试验显示基岩波与地表波输入时,体系变化规律基本一致,其结果表明:土体地表加速度被放大,且输入加速度峰值增加,地表加速度放大倍数减小;一般地震波时,随着输入加速度峰值的增加,储液晃动波高大致呈线性增加。长周期地震波下则为非线性增加,且晃动波较大。此外,液体产生的晃动波高与储罐类型相关。细高型储罐产生的波高稍大;储罐提离高度随着输入加速度峰值的增加呈非线性增长。长周期地震波激励下,储罐提离高度小于一般地震波时的提离高度。细高型储罐在长短周期地震波激励下,提离高度较为接近,而一般储罐在两种地震波激励下,提离高度相差较大。细高型储罐提离高度大于一般储罐的提离高度。建议在储罐设计时考虑长周期地震波的影响。     

离子液体双水相体系相平衡研究进展

离子液体相行为及相关组分的影响规律对萃取过程的研究、分离工艺流程的选择和设计至关重要,在生物分子的分离与纯化方面也显示了广阔的应用前景。本文主要从离子液体双水相体系相平衡在国内和国外的研究进展两个方面进行了论述,探讨了研究中存在的一些问题,为深入探究离子液体双水相体系相平衡的应用提供参考。     

基于现行规范的粉土定名分析与探讨

根据现行规范对粉土定名的规定,从工程实践角度,通过对粉土、黏性土的室内试验、原位测试和野外鉴别结果进行综合分析,论述了在不同的液限标准下,同一种土可能定出不同的名称.因不同类型土的物理力学性质存在较大差异,如粉土具有流变性和触变性等对工程极为不利的特性,因此土层定名错误会误导设计和施工,危及工程安全.     

邢台市大气水汽及云水变化的降水前兆分析

利用MWP967KV型地基微波辐射计及红外观测仪探测数据,对邢台市2016年发生降水前的水汽含量(IWV)、液态水含量(ILW)和云底高度变化特征进行了分析.结果表明,云底高度的持续明显下降提前约1h于IWV的明显升高,IWV的明显增加提前约1h于ILW的明显升高;IWV呈持续增加时间≥3h且IWV≥4.00cm,IL...     

金川硫化铜镍矿床成矿模式

金川矿床产出于过渡区,位于中朝地块西南部阿拉善边缘隆起上,含矿岩体是多期上侵贯入形成的,时代为1509～1526Ma。 导源于地幔深郎富硫的铁质超基性岩浆,沿超壳深断裂上侵到达地壳岩浆房。注入岩浆房的岩浆在橄榄石结晶温度的区间内,发生熔离作用和橄榄石结晶作用,按重力效应正岩浆房中自下而上先后形成了矿浆、富矿岩浆、含矿岩浆和岩浆的分层格局。随着温度下降,在构造应力脉动式驱动下,岩浆房中自上而下按岩浆、含矿岩浆、富矿岩浆和矿浆的顺序,先后分别沿相同通道上侵、贯入于现存空间成岩成矿、每次上侵、贯入的浆体都沿着前次浆体的下侧部和根部定位。 整个成矿过程由岩浆房中的深部熔离、橄榄石结晶和重力分层作用→第一期次岩浆上侵→第二期次含矿岩浆上侵→第三期次富矿岩浆贯入→晚期矿浆贯入→接触交代成矿→热液叠加成矿,构成一个完整的硫化铜、镍矿床的成矿模式和时空分布系列。