null set 中文意思是什麼

null set 解釋
空集, 零集
  • null : adj 1 無效力的，無束縛力的。2 無效的，無用的，無益的；無價值的。3 沒特徵[個性]的，沒表情的。4 〈...
  • set : SET ＝safe electronic transaction 安全電子交易〈指用信用卡通過因特網支付款項的商業交易〉。n 【埃...
  1. Set null specifies that cascading referential integrity actions set foreign keys to null

    Set null指定級聯引用完整性操作將外鍵設置為null 。
  2. You can set report parameter properties that determine whether parameters are single - valued or multivalued, are visible at run time, use a static or query - based valid values list, have default values, and accept null or blank values

    < parametername > . count來返回集合中單個參數值的數量。您可以使用split或join函數拆分或組合數組中的值。可以使用string或cint函數將值轉換為字元串或整數。
  3. This valve uses the packing structure with the ability of self - seal, needs no constant adjustment, features very light open and close and a reliable seal an assisting sealing grease injection structure is set in the packing to have the sealing performance absolutely reliable and get a true null leak, settling the problem for the packing place of universal valves to be easiest leak outward

    本閥採用帶自密封能力的填料結構，無需經常調節，開、關極為輕便，且密封性可靠，填料函處設有輔助密封油脂注入結構，密封性能絕對可靠，真正達到零泄漏；解決了通用閥門填料處最容易外漏的蔽病。
  4. If a set contains no elements we shall designate it by Ф and define it as the empty or null set.

    如果一個集合不包含元素，我們就把它記為，且定義它為空集或零集。
  5. Article 12 terms and conditions set in a standard contract, which violate the principle of good faith and are conspicuously unfair to consumers, shall be null and void

    第12條（定型化契約無效之情形）定型化契約中之條款違反誠信原則，對消費者顯失公平者，無效。
  6. If the query object is constructed with no parameters, the property is null until specifically set

    如果在構造查詢對象時沒有使用參數，則除非專門設置該屬性，否則該屬性一直為空。
  7. Pointer to a brush object. set to null to use the default halftone brush

    指向畫刷的指針。設置為null時，使用預設的黑白畫刷。
  8. As the main research institute of ring laser gyroscopes in china, teaching and research section 208, nudt, is always puzzled by the problem of null - shift in the process of developing mechanically dithered ring laser gyroscopes ( mdrlg ). the problem is that the mdrlg ' s null shift equal to the integral times of dither periods when the sample time is set as integer dither periods

    作為國內激光陀螺主要研製單位的國防科大208室，在機械抖動激光陀螺（機抖陀螺）研製過程中一直為零漂問題所困擾：實驗測得機抖陀螺零漂為抖動周期（采樣時間取整數個抖動周期）的整數倍。
  9. This feature allows value types to have an uninitialized, or empty, state similar to how reference types can be set to null

    此功能允許將值類型設置為未初始化狀態（即空狀態） ，這與將引用類型設置為
  10. In this thesis, we study and discuss deeply data preprocessing based on rough set. first, the characteristic and shortcoming of primary algorithms about the computation of null values is analysised, and principle and target of the completation is indicated

    而經典的粗集理論不能處理原始數據資料中的遺漏信息以及值域為實數的數據，需要經過數據預處理，包括數據補齊和離散化處理后才能進行知識獲取，因此如何有效地進行數據預處理具有非常重要的現實意義。
  11. Parameter set the value to null

    參數的重載版本將該值設置為空。
  12. Property is set to a non - null character,

    屬性設置為非空字元，則
  13. If the value is set to the null character, parity replacement is disabled

    如果該值被設置為空字元，則奇偶校驗替換被禁用。
  14. Is currently positioned has a null attribute set to the value true

    當前定位的xml元素是否將某個空屬性設置為值
  15. The practice proved uses the hot tubular real null set to be hot the solar energy air conditioning technology plan which and the absorption type refrigerator unifies is successful, it opened a new application domain for the solar energy light heat utilization technology

    實踐證明採用熱管式真空集熱器與吸收式製冷機相結合的太陽能空調技術方案是成功的，它為太陽能光熱利用技術開辟了一個新的應用領域。
  16. When set to off, the divide - by - zero and arithmetic overflow errors cause null values to be returned

    設置為off時，被零除錯誤和算術溢出錯誤將導致返回空值。如果在
  17. In the meantime, several formulas on the density of null external potential. quasi - harmonics and multi - harmonics are set and proven, which are very useful to construct and represent the characters of the functions above

    同時，給出並證明幾個具有重要實用意義的關于零外部位密度、擬調和性及重調和性場源性質的基本公式。
  18. The runtime treats any assembly that does not have the culture attribute set to null as a satellite assembly

    運行庫將任何區域性屬性未設置為空的程序集按附屬程序集處理。
  19. If the value passed in is null when you try to set the property, the

    如果嘗試設置屬性時傳入的值為null ，則重置
  20. During expression evaluation when set arithabort is off, if an insert, delete or update statement encounters an arithmetic error, overflow, divide - by - zero, or a domain error, sql server inserts or updates a null value

    如果set arithabort為off ，並且在對表達式求值的過程中insert 、 delete或update語句遇到算術錯誤（溢出、被零除或域錯誤） ， sql server將插入或更新一個null值。
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