共查询到19条相似文献,搜索用时 46 毫秒
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本文以两个实例介绍了在PB环境下,利用Creat()和SyntaxfromSQL()函数创建动态数据窗口的设计方法。 相似文献
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《航天标准化》1997,(4)
标准号QJ13A一97QJgl7A一97QJ108自A一97QJIO97A一97QJll72A一97QJ]1 95.SA一97QJ1241A一97QJ1456A一97QJ1467A一97QJ1493A一97QJ157().3A一97QJ188‘)A一97QJ 1 886A一97QJ191 IA一97QJZO78A一97QJ214()A一97QJ2344A一97QJ2558A一97QJ2859一96QJ286()一96QJ2861一96QJ2862一9戈弓QJ2863一96QJ2864一97QJ2865一97QJ2866一97QJ2867一97QJ2868一97QJ286()一97QJ287O一97QJ2871一97QJ2872一97QJ2873一97QJ287‘l一97QJ2875一97QJ2876一97QJ2877一97QJ2878一97QJ2879一97QJ2880一97QJ2881一97QJ288… 相似文献
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文章讨论了Godel逻辑系统中标准子代数E0上的广义矛盾式理论,给出标准子代数上可达0-重言式的一个分划,证明了在标准子代数E0中,重言式不可能由对非重言式进行有限次升级算法得到,利用广义重言式和α-矛盾式概念在E0中给出了F(S)的一个关于()同余的分划. 相似文献
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硅微陀螺阵列信号处理技术研究 总被引:3,自引:0,他引:3
() 摘 要:基于一种新的硅微陀螺随机漂移模型和被测角速度的随机游走模型,建立硅微陀螺阵列随机漂移过程的Kalman滤波方程。通过数据融合方法,在选择合适的陀螺间互相关系数的基础上,可以将硅微陀螺的静态漂移从52.1度/小时降低为0.465度/小时。利用同类多传感器的数据融合和被测量动态信号的差分技术,可以实时辨识出硅微陀螺的随机漂移,通过已被检测出的动态信号的进一步Kalman滤波,最终可将被测信号的信噪比提高11dB.
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利用热重-微分热重分析技术研究了自制的双酚芴乙二胺苯并噁嗪树脂在氮气气氛中的热分解动力学,通过Kissinger法和Ozawa法对该树脂进行动力学分析,求出相关动力学参数。利用模型拟合法推测双酚芴乙二胺苯并噁嗪树脂的热分解机理,并用非模型拟合法进行验证。结果表明,双酚芴乙二胺苯并噁嗪树脂的热分解平均活化能及指前因子分别为E=260.55 k J/mol;lg A=16.98 s-1。双酚芴乙二胺树脂热分解过程符合随机成核和随后生长机理,其分解反应微分函数为f(α)=n(1-α)×[-ln(1-α)]1-1n;积分函数为g(α)=[-ln(1-α)]1n,其中n=1/5,对应的热分解反应方程为dαd T=9.55×1016()βexp-260.55×103RT×15(1-α)×[-ln(1-α)]-4。 相似文献
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《航天标准化》1998,(6)
标准号被代替标准号标准名称实施日期QJ 500A一98Ql 501A一98Ql 547A一98QJ 604A一98QJ 605A一98QJ 606A一98Ql 607A一98QJ 608A一98QJ 609A一98QJ 6llA一98Ql 612A一98QJ 615A一98QJ 619A一98QJ 620A一98QJ 62lA一98Ql 622A一98QJ 623A一98QJ 624A一98Q下649A一98QJ 908A一98Q 1016A一98QI()34A一98QJ 1042A一98QJ 1408A一98Q」1480A一98QJ 15llA一98Q!1545A、98QJ 1551A一98QJ 1575A一98Ql 1663A一98QJ 1705A一98QJ 1716A一98QJ 1731A一98QJ 1743A一98QJ 1908A一98侧1989A一98QJ 1995A一98Ql 203… 相似文献
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T. Hashimoto T. HoshinoS. Tanaka H. OtakeM. Otsuki S. WakabayashiH. Morimoto K. Masuda 《Acta Astronautica》2014
The Japan Aerospace Exploration Agency (JAXA) views the lunar lander SELENE-2 as the successor to the SELENE mission. In this presentation, the mission objectives of SELENE-2 are shown together with the present design status of the spacecraft. JAXA launched the Kaguya (SELENE) lunar orbiter in September 2007, and the spacecraft observed the Moon and a couple of small satellites using 15 instruments. As the next step in lunar exploration, the lunar lander SELENE-2 is being considered. SELENE-2 will land on the lunar surface and perform in-situ scientific observations, environmental investigations, and research for future lunar utilization including human activity. At the same time, it will demonstrate key technologies for lunar and planetary exploration such as precise and safe landing, surface mobility, and overnight survival. The lander will carry laser altimeters, image sensors, and landing radars for precise and safe landing. Landing legs and a precisely controlled propulsion system will also be developed. A rover is being designed to be able to travel over a wide area and observe featured terrain using scientific instruments. Since some of the instruments require long-term observation on the lunar surface, technology for night survival over more than 2 weeks needs to be considered. The SELENE-2 technologies are expected to be one of the stepping stones towards future Japanese human activities on the moon and to expand the possibilities for deep space science. 相似文献
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Cosmic Research - An Erratum to this paper has been published: https://doi.org/10.1134/S0010952521120017 相似文献
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北京时间2009年6月19日凌晨5点,NASA发射两颗卫星探月。这是美国“重返月球”计划的第一步。美国是最先探索月球的国家之一。从卫星“绕月”到“阿波罗”飞船首次登月,再到如今“重返月球”计划中建立永久性月球基地,美国的月球探索已进入更深屡次。月球,田其独特的空间位置,被美国视为太空探索的重要跳板。 相似文献
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The UK space industry is an important part of the British economy and likely to become more so, but it needs well-educated graduates, government support and investment. Such an effort would be aided by an educated public. Education is an important part of a successful space industry policy. The Space Education Council, supported by the BNSC, is doing important work talking to the public about space. This article argues that there is a need for more space education work and reports on the Space Education Council's recent symposium. 相似文献
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Susan Gail Brookstone 《Space Policy》1985,1(2):217-218
Over 200 people attended the ‘International Business in Space’ conference, organized by the Center for Space Policy Inc, Cambridge, MA, USA, in Washington, DC, 9–11 January 1985. The official focus - commercial space developments in the USA, Canada, Europe and Japan - was somewhat of a misnomer. While US, Canadian and European views and interests were well represented, the Japanese element was almost completely absent. Virtually every category of organization likely to be involved in the ‘industrialization of space’ was strongly represented: government agencies, major and medium-sized aerospace companies, entrepreneurial space firms, and service organizations, eg consulting groups, law firms and financial institutions. Not surprisingly at this stage, attendance by non-aerospace potential users of space was very weak. This report highlights two major themes - international cooperation and the role of overnments. 相似文献