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用Python编写奇偶分数求和函数
了解基本编程知识，熟悉编程算法，用Python编写奇偶分数求和函数。(Understanding basic programming knowledge, familiar with programming algorithms, using Python to write odd and even fraction summation function.)
- 2020-06-23 19:40:01下载
- 积分：1
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chengdu_map_new
说明： 成都市shp格式地图，带地理坐标系，内容详细。包含大量的地理信息。(Chengdu city shp format map with geographic coordinate system, detailed content. Contains a lot of geographic information.)
- 2020-07-01 15:40:01下载
- 积分：1
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UBLOX GPRS Protocol
说明： gps tracker protocol of uniguard
- 2020-06-19 19:40:02下载
- 积分：1
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GPS-postion-Nav-source
gps定位程序 测试通过，可以直接拿来用 GPS卫星提供了P码（精码）和C/A码（粗码）两种定位服务。P码为军方服务，定位精度达到3米；C/A码对社会开放，定位精度为14米。出于自身安全的考虑，美国先后实施了SA和AS政策。SA政策在C/A码中人为引入了误差，使定位精度下降到100米；AS政策则对P码实行加密。 由于GPS对社会开放，因此各类接收机、测量设备如雨后春笋般涌现，并广泛应用于各行各业，彻底改变了传统的定位导航方式.(gps positioning program testing by direct use of them GPS satellites provide two kinds of location-based services in the P-code (precise code) and the C/A code (coarse code). P code for military service, positioning accuracy of 3 meters C/A code of the open society, positioning accuracy of 14 meters. For their own security reasons, the United States has implemented a policy of SA and AS. SA policy is artificially introduced in the C/A code of the error, so that the positioning accuracy down to 100 meters AS policy is implemented in P-code encryption. GPS open society, the various types of receivers, measuring equipment have sprung up, and are widely used in all walks of life, completely changed the traditional positioning and navigation.)
- 2021-04-10 11:28:59下载
- 积分：1
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GPSsignalGenP
GPS信号的设计，调制，及捕获技术捕获性能仿真(GPS signal design, modulation, and capture technology capture performance simulation)
- 2015-06-17 14:36:16下载
- 积分：1
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层次分析法
说明： 层次分析法，简称AHP，是指将与决策总是有关的元素分解成目标、准则、方案等层次，在此基础之上进行定性和定量分析的决策方法。(It refers to the decision-making method that divides the elements that are always related to decision-making into objectives, criteria, schemes, etc. on the basis of which qualitative and quantitative analysis can be carried out)
- 2020-06-25 12:40:02下载
- 积分：1
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syscomp
比较软件界面操作和数据表变化的小工具，快速定位表逻辑(tool which compare interface operation with table change)
- 2014-05-08 21:00:14下载
- 积分：1
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ntpserver
Python 抓取 COM Port 未完成(Python Serach COM Port non Fininshed)
- 2019-01-23 17:07:10下载
- 积分：1
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XF_GPS
GPS客户端源代码程序，可以实现很多功能，想学习的朋友可以入手。(GPS client source code, can achieve a lot of features, like friends can learn to start.)
- 2011-07-01 11:50:17下载
- 积分：1
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一种数字中频 GPS 信号生成方法 GPS generation
研究了一种数字中频 GPS 信号生成方法。给出了数字中频信号数学模型，模型考虑了各种因素对信号的影响。通过导航电文分析，提出信号传播时延、多普勒频移以及信号入射方向的估计方法。给出了中频信号产生的流程，对其中时延的设置，信号的上变频、信号幅度设置以及方向信息的导入进行了阐述。对所生成的信号模型进行了仿真分析，给出了信号产生各个阶段的频谱，对所生成的信号进行了相关捕获。仿真结果表明频谱特征符合理论分析，能够被捕获并找出信号时延从而实现定位。证明该信号模型能作为信号源应用于 GPS接收机研制中。(】The paper discusses a digital IF GPS signal generation method, gives the mathematic
model of digital IF signal. This mathematic model takes into account the influence of various
factors. Based on analysis of the navigation data, the method to estimate signal propagation time,
Doppler frequency shift and the coming angle of signal is proposed. The flow to generate IF signal
is given, in which the setting of time delay, the up-frequency conversion, the setting of signal
magnitude and the introduction of direction information are expounded. The signal generation model
is simulated and analyzed, the spectrum of signal in each stage given, and the correlation capture
of the generated signal also done. Simulation indicates that the spectrum is in accord with
theoretical analysis the signal could be captured, thus find the time delay, accomplish the
orientation. The signal model is proved applicable in the research and development of GPS receiver.)
- 2013-05-15 11:44:16下载
- 积分：1
