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visibility

  • source code to compute the visibility polygon of a point in a polygon.

    source code to compute the visibility polygon of a point in a polygon.

    標簽： polygon visibility compute source

    上傳時間： 2015-01-09

    上傳用戶：wpt

  • The purpose of Software Project Tracking and Oversight is to provide adequate visibility into actual

    The purpose of Software Project Tracking and Oversight is to provide adequate visibility into actual progress so that management can take effective actions when the project s performance deviates significantly from the plans.

    標簽： visibility Oversight Software Tracking

    上傳時間： 2017-02-27

    上傳用戶：三人用菜

  • 基于ARM的前向散射式能見度儀的設計

    大氣能見度(visibility)是反映大氣透明度的一個指標，是氣象觀測的常規項目，它對航海、航空、陸上交通以及軍事活動等都有重要影響。目前國內能見度儀，特別是適用于海洋惡劣環境中的便攜式、高精度的能見度儀較少，需要研制適合海上測量的能見度儀。 在系統闡述大氣能見度檢測理論依據的基礎上，研究了能見度檢測系統的關鍵技術，主要包括光源的穩定性、微弱信號的相敏檢測技術及信號的抗干擾技術等。本系統由發射模塊、接收模塊、信號處理模塊及電源模塊等組成。設計了發射模塊和接收模塊的光學系統，并進行了發射光源的調制設計、接收模塊中的光電轉換電路、放大電路、帶通濾波電路的設計及信號的鎖相放大電路的設計等。大氣能見度測量屬于微弱信號檢測技術，在海上更容易受到外界自然光及其它環境因素的干擾，因此濾除各種干擾，提取有用的微弱信號是本設計的核心。本文重點研究了光敏檢測技術和適合于微弱信號檢測的鎖相放大技術，設計了以OPT101為核心的光敏檢測電路，有效提高了電路的靈敏度和抗干擾，簡化了設計；設計了以平衡調制解調芯片AD630為核心的鎖相放大電路和由雙D觸發器SN74HCT74及單穩態觸發器M74HC4538B1R組成的移相電路，實驗證明，在較大的噪聲背景下，該電路可以有效地提取出反映能見度變化的有用信號。鎖相放大后的直流信號，經AD處理后輸入到微處理器ARM中，經過理論運算最后得到能見度值。為了保證系統工作的穩定性，特別是海上惡劣環境，對系統進行了防鹽、霧、水的設計，如對鏡頭進行鍍膜、對PCB板進行了三防處理等。 最后進行了能見度儀樣機的研制。

    標簽： ARM 散射 儀的設計

    上傳時間： 2013-04-24

    上傳用戶：胡佳明胡佳明

  • Microsoft Visual Studio 2005 Unleashed is a deep dive into the Visual Studio 2005 tool. Specifically

    Microsoft Visual Studio 2005 Unleashed is a deep dive into the Visual Studio 2005 tool. Specifically, it will provide you with solid guidance and education that will allow you to squeeze the ultimate productivity and use out of the Visual Studio 2005 development environment. This book folds in real-world development experience with detailed information about the IDE to make you more productive and ease transition from other development environments (including prior versions of Visual Studio). This book will also help you increase team collaboration and project visibility with Visual Studio Team Systems and it will give you straight, to-the-point answers to common developer questions about the IDE.

    標簽： Visual Studio 2005 Specifically

    上傳時間： 2016-07-08

    上傳用戶：tuilp1a

  • RFID_-_A_Guide_to_Radio_Frequency_IDentification

    Radio frequency identifi cation (RFID) technology is a wireless communication technology that enables users to uniquely identify tagged objects or people. RFID is rapidly becoming a cost-effective technology. This is in large part due to the efforts of Wal-Mart and the Department of Defense (DoD) to incorporate RFID technology into their supply chains. In 2003, with the aim of enabling pallet-level tracking of inventory, Wal-Mart issued an RFID mandate requiring its top suppliers to begin tagging pallets and cases, with Electronic Product Code (EPC) labels. The DoD quickly followed suit and issued the same mandate to its top 100 suppliers. This drive to incorporate RFID technology into their supply chains is motivated by the increased ship- ping, receiving and stocking effi ciency and the decreased costs of labor, storage, and product loss that pallet-level visibility of inventory can offer.

    標簽： A_Guide_to_Radio_Frequency_IDenti fication RFID

    上傳時間： 2020-06-08

    上傳用戶：shancjb

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