使用单点定位误差补偿提高姿态测量精度

提出采用补偿单点定位误差的方法提高GPS姿态测量系统的精度。介绍GPS姿态测量系统的直接计算法,然后采用Z变换增强FASF算法求解载波相位整周模糊值,最后给出了采用补偿单点定位误差的GPS姿态测量系统的系统流程和计算机实验结果。实验表明,提出的方法可有效地提高姿态测量系统的测姿精度。     

模拟汽油中铁锰二组分同时测定实验条件探索

Fe^3＋和Mn^2＋分别在不同pH下与5-Br-PADAP形成有色络合物．显色条件实验表明，Fe^3＋和Mn^2＋在单一组分的不同缓冲溶液体系中不能与显色剂同时显色．通过研究，提出选用乙酸一乙酸钠、硼砂一盐酸双缓冲溶液体系，成功地解决了Fe^3＋和Mn^2＋同时与5-Br-PADAP显色的问题，为进行汽油中的铁、锰含量的分光光度同时测定提供了基本条件．在此基础上，应用化学计量学方法对实验结果进行了解析．     

醋酸纤维薄膜电泳法分离测定鸡血清蛋白质

应用醋酸纤维薄膜电泳法分离测定了鸡血清中不同蛋白质。对电流强度、电泳时间和点样量等影响分离效果的条件进行了选择。并用光度计和薄层扫描仪对样品进行了定量测定。     

基于稳健补偿的卫星数据电波折射误差修正方法

折射误差是观测数据包含的主要误差源之一,也是影响卫星跟踪与控制以及轨道确定精度的主要因素。由于实时观测数据采样格式的不同,同一个采样时间内本应互相匹配的测量元素,因为丢失、干扰等而变得不再匹配,从而使得卫星实时跟踪数据包含的折射误差难以准确修正。提出的观测数据双向稳健补偿方法有效地解决了同一采样时间内测量元素的匹配问题,以及折射误差的修正问题,确保了卫星轨道确定的精度。实测数据计算以及定轨结果检验表明,该方法是有效的实用方法。     

5-氨基水杨酸锌水分测定方法的改进

以CH3OH-NH3溶液为溶剂,用费休氏法对5-氨基水杨酸锌的水分进行测定.方法快速,结果准确,优于常规费休氏法.为类似有机金属药物中水分的测定提供了新的方法.     

天然水中Mn(Ⅱ)的光化学荧光催化动力学法测定

叙述了基于Mn(Ⅱ)对酸性铬蓝K光化学反应的催化作用而建立起的一种Mn(Ⅱ)的光化学荧光催化动力学分析的新方法。Mn(Ⅱ)的含量在0～120ng/ml范围内呈良好的线性关系,相关系放为0.998,检测限和变异系数分别为2ng/ml和1.3％,本法已用于直接测定自来水中的Mn(Ⅱ)结果满意,还初步探讨了该反应的机制。     

石墨炉原子发射法测定饮料中的铝

石墨炉原子发射法(GFAES)是近年来发展起来的一种新的分析方法,该法对某些易激发元素(如 K、Na、Ba、Al 等)的测定灵敏度和稳定性皆优于石墨炉原子吸收法(GFAAS)。本文在非火焰原子吸收装置上,对铝的 GFAES 法测定进行了较详细的研究,并通过测定不同包装的同类饮料中铝的含量,考察了方法的可靠性和精度,结果发现,该法完全可用于饮料中微量铝的测定。当被测溶液中铝的含量在0.00～0.25ppm 时,铝的发射强度与浓度呈线性关系。加入回收试验表明,方法的回收率达96.0%～102.0%,对饮料中常见的各种成份进行干扰试验,发现200倍的 K~+、Na~+、Ca~(++)、Mg~(++)、CO_3~(--)和50倍的柠檬酸,苯甲酸等不干扰铝的测定.     

环氧树脂氧指数测定条件对测定结果的影响

研究了阻燃环氧树脂固化物样品规格、质量、组成、性质及环境对其氧指数测定结果的影响,对测定结果的判据进行了有益的改进。     

The detection of structural deformation errors in attitude determination

In the determination of the attitude parameters from a multi-antenna GPS array, one of the major assumptions is that the body frame is rigid at all times. If this assumption is not true then the derived attitude parameters will be in error. It is well known that in airborne platforms the wings often experience some displacement during flight, especially during periods of initializing maneouvres, such as taking off, landing,and banking. Often it is at these points in time that it is most critical to have the most precise attitude parameters.There are a number of techniques available for the detection of modeling errors.The CUSUM algorithm has successfully been implemented in the past to detect small persistent changes. In this paper the authors investigate different methods of generating the residuals, to be tested by the CUSUM algorithm, in an effort to determine which technique is best suited for the detection of structural deformation of an airborne platform. The methods investigated include monitoring the mean of the residuals generated from the difference between the known body frame coordinates, and those calculated from the derived attitude parameters. The generated residuals are then passed to a CUSUM algorithm to detect any small persistent changes. An alternative method involves transforming the generated residuals into the frequency domain through the use of the Fast Fourier Transform. The CUSUM algorithm is then used to detect any frequency changes. The final technique investigated involves transforming the generated residuals using the Haar wavelet. The wavelet coefficients are then monitored by the CUSUM algorithm in order to detect any significant change to the rigidity of the body frame.Detecting structural deformation, and quantifying the degree of deformation, during flight will ensure that these effects can be removed from the system, thus ensuring the most precise and reliable attitude parameter solutions. This paper, through a series ofsimulations, will assess the effectiveness of the above mentioned techniques for detecting structural deformation effects on a GPS multi-antenna array. These principles are then tested with experimental data.     

论法院对涉外仲裁协议有效性及其适用法律的认定

结合我国与相关国家国际商事仲裁立法与实践和相关的国际公约,论述了目前世界上并不存在统一的认定仲裁协议有效性标准,而由各国法院依据应当适用的法律作出认定。鉴于各国法律对仲裁协议有效性的规定不同,我国法院应当适用管辖特定涉外仲裁协议的准据法,而不是在所有情况下均适用我国法对该仲裁协议的有效性作出认定。法院在决定涉外仲裁协议准据法时,首先应当考虑适用当事人双方在仲裁协议中共同选择的法律,如无此项选择,则应当适用与该仲裁协议有最密切联系的国家的法律来认定该协议的有效性。在国际商事仲裁立法与实践上,仲裁地点通常被认为与仲裁协议有着最密切的联系。