這一實驗性的“餐館系統”是一個很典型商業應用，但并不復雜。歸根結底，就實現5個功能：1）增加一個新的預約（涉及數據庫中的一個insert操作），2）刪除一個被選中的預約（delete操作），3）在一個已有預約上記錄到達時間（提前預約的顧客來吃飯了）（對應update操作），4）更改分配給一個預約的餐桌（update操作），5）顯示指定日期內所有已有的預約（select操作）。從數據庫的角度來看，要實現這些功能不難。在我們的樣板系統中，在運行時主要通過以下對象的合作，實現上述功能。
上傳時間： 2018-11-02
上傳用戶：jack110
We were on the lookout for ice. I was in a 32 foot sailing yacht with writer and explorer Tristan Gooley, undertaking a double-handed sail from Scotland through the Faroes up to 66 33 45.7 N and the midnight sun. Now sailing out of the Arctic Circle we were approaching Iceland from the north, heading for the Denmark Straits, where ice flowed south. The Admiralty Pilot warned of bergs but the ice charts we had sailed with were over a week old. We needed an update.
標簽： Interference Analysis
上傳時間： 2020-05-27
上傳用戶：shancjb
This book on electrostatic discharge phenomena is essentially a translation and update ofa Swedish edition from 1992. The book is intended for people working with electronic circuits and equipments, in application and development. All personnel should be aware of the ESD-hazards, especially those responsible for quality. ESD-prevention is a part of TQM (Total Quality Management). The book is also usable for courses on the subject.
標簽： Electronics Scourge ESD The of
上傳時間： 2020-06-05
上傳用戶：shancjb
Since the original publication of Manual 74 in 1991, and the preceding “Guidelines for Transmission Line Structural Loading” in 1984, the understanding of structural loadings on transmission line structures has broadened signifi cantly. However, improvements in computational capa- bility have enabled the transmission line engineer to more easily deter- mine structural loadings without properly understanding the parameters that affect these loads. Many seasoned professionals have expressed concern for the apparent lack of recent information on the topic of struc- tural loadings as new engineers enter this industry. The Committee on Electrical Transmission Structures is charged with the responsibility to report, evaluate, and provide loading requirements of transmission struc- tures. This task committee was therefore formed to update and revise the 1991 manual.
標簽： Transmission Guidelines Electrical Line for
上傳時間： 2020-06-07
上傳用戶：shancjb
The first edition as well as its forerunner of Kuffel and Abdullah published in 1970 and their translations into Japanese and Chinese languages have enjoyed wide international acceptance as basic textbooks in teaching senior under- graduate and postgraduate courses in High-Voltage Engineering. Both texts have also been extensively used by practising engineers engaged in the design and operation of high-voltage equipment. Over the years the authors have received numerous comments from the text’s users with helpful suggestions for improvements. These have been incorporated in the present edition. Major revisions and expansion of several chapters have been made to update the continued progress and developments in high-voltage engineering over the past two decades.
標簽： Engineering Voltage High
上傳時間： 2020-06-07
上傳用戶：shancjb
The past decade has seen an explosion of machine learning research and appli- cations; especially, deep learning methods have enabled key advances in many applicationdomains,suchas computervision,speechprocessing,andgameplaying. However, the performance of many machine learning methods is very sensitive to a plethora of design decisions, which constitutes a considerable barrier for new users. This is particularly true in the booming field of deep learning, where human engineers need to select the right neural architectures, training procedures, regularization methods, and hyperparameters of all of these components in order to make their networks do what they are supposed to do with sufficient performance. This process has to be repeated for every application. Even experts are often left with tedious episodes of trial and error until they identify a good set of choices for a particular dataset.
標簽： Auto-Machine-Learning-Methods-Sys tems-Challenges
上傳時間： 2020-06-10
上傳用戶：shancjb
-file /win8.vdf 鏡像文件名，無此參數將搜索當前目錄的iso鏡像 -dev PciRoot(0x0)/Pci(0x1,0x1)/Ata(Primary,Master,0x0)/HD(3,MBR,0x9553A441,0xEFFF800,0x13FF800) 設備路徑，無此參數默認為當前設備 -wait 50 啟動前等待 -mem 將鏡像載入內存， -type HD 可選CD HD FD,無此參數默認HD鏡像類型，類型錯了不能啟動 -dev auto 搜索所有設備
上傳時間： 2020-12-20
上傳用戶：
LAN9254 + SAME54 MCU 從站設計?1.支持2/3個port口的EtherCat Slave控制器，并內置有8個FMMU 和8個SyncManagers; 并有8KB的更大的DPRAM存儲資源；?2. 8/16bit總線，支持和大多數8/16bit以及32bit的host MCU通訊； ?3. 內部集成了支持HP Auto-MDIX的以太網PHY芯片； ?4. 支持Wake on Lan以太網遠程喚醒技術；兼容EtherCat P協議； ?5. 具有低功耗工作模式，可以允許系統進入睡眠模式以節省更多功耗，直到被Master訪問； ?6. 支持線纜診斷技術； ?7. 支持1.8V~3.3V的靈活可變的IO電壓，省去需要外加Voltage shifter芯片的成本； ?8. 多功能GPIO，可以配置為Local Bus，SPI, PWM，通用GPIO等多種接口功能； ?9. 工業級溫度范圍，最高可以支持105度工業溫度要求；
標簽： mcu lan9254 ethercat從站
上傳時間： 2021-11-09
上傳用戶：
C10018_RTL8201CP-VD-LF_2012-11-22.PDFSINGLE-CHIP/SINGLE-PORT 10/100M FAST ETHERNET PHYCEIVER (With Auto Crossover) DATASHEET
標簽： rtl8201cp
上傳時間： 2022-01-13
上傳用戶：xsr1983
The PW2606B is a front-end over voltage and over current protection device. It achieves wide inputvoltage range from 2.5VDC to 40VDC. The over voltage threshold can be programmed externally orset to internal default setting. The low resistance of integrated power path nFET switch ensures betterperformance for battery charging system applications. It can deliver up to 1A current to satisfy thebattery supply system. It integrates the over-temperature protection shutdown and auto-recoverycircuit with hysteresis to protect against over current events
標簽： pw2606b
上傳時間： 2022-02-11
上傳用戶：
