missing value 中文意思是什麼
missing value
解釋
漏失值-
Abstract : it is observed that the sommerfeld ' s formula for a progressive spherical wave is not covariant with respectro the rotation of the coordinate system. it contains complex partial waves that are not physical. the standing wave representation of the same formula is shown to be covariant and physical. it is applied to solve the boundary value problem of fiber optics. the radiation modes as well as the guided normal modes are obtained in closed forms. the intensity distribution in various modes is obtained. it is remarked that the mode of critical refraction is missing
文摘:說明了球面行波的索末菲公式在坐標轉動下不協變.證明了球面波的駐波表示是協變的，因而是一個物理的關系式，故適用於圓柱坐標中各類波動方程的定解問題.作為一個例，應用於光纖光學，導出了受導簡正模和輻射模的表達式，以及各模式的強度分佈 -
The insurance adjustor had to ascertain the exact value of the missing jewels
這個保險金估算人必須核實這些丟失的珠寶的價值。 -
Setting the value to less than 10 seconds creates the possibility of a heavily loaded system missing pings and declaring a false failure
如果將值設置為低於10秒，則可能使高負荷系統丟失ping並聲明錯誤故障。 -
Failure that this text the author think the han - feizi not it is not cool that political theories does not consist hi the system, he with the leading of tyranny, contrary, he is a clear and definite objection tyranny of, but believe in missing, the value ' s fan ' s, is just real reason that fail of this theories
本文作者認為韓非政治理論的失敗不在於專制，他本身也不是酷政和暴政的倡導者，相反，他是明確反對暴政的。信仰的失落，價值的迷茫，才是這一理論失敗的真正原因。 -
Firstly, influence factors of generalization of neural network are presented in this thesis, in order to improve neural network ’ s generalization ability and dynamic knowledge acquirement adaptive ability, a structure auto - adaptive neural network new model based on genetic algorithm is proposed to optimize structure parameter of nn including hidden layer nodes, training epochs, initial weights, and so on ; secondly, through establishing integrating neural network and introducing data fusion technique, the integrality and precision of acquired knowledge is greatly improved. then aiming at the incompleteness and uncertainty problem consisting in the process of knowledge acquirement, knowledge acquirement method based on rough sets is explored to fulfill the rule extraction for intelligent diagnosis expert system, by completing missing value data and eliminating unnecessary attributes, discretization of continuous attribute, reducing redundancy, extracting rules in this thesis. finally, rough sets theory and neural network are combined to form rnn ( rough neural network ) model for acquiring knowledge, in which rough sets theory is employed to carry out some preprocessing and neural network is acted as one role of dynamic knowledge acquirement, and rnn can improve the speed and quality of knowledge acquirement greatly
本文首先討論了影響神經網路的泛化能力的因素，提出了一種新的結構自適應神經網路學習演算法，在新方法中，採用了遺傳演算法對神經網路的結構參數（隱層節點數、訓練精度、初始權值）進行優化，大大提高了神經網路的泛化能力和知識動態獲取自適應能力;其次，構造集成神經網路，引入數據融合演算法，實現了基於集成神經網路的融合診斷，有效地提高了知識獲取的全面性、完善性及精度;然後，針對知識獲取過程中所存在的不確定性、不完備性等問題，探討了運用粗糙集理論的知識獲取方法，通過缺損數據補齊、連續數據的離散、沖突消除、冗餘信息約簡、知識規則抽取等一系列的演算法實現了智能診斷的知識規則獲取;最後，將粗糙集理論與神經網路相結合，研究了粗糙集-神經網路的知識獲取方法。 -
What is still missing here is the cache scope value
此處仍然缺少緩存作用域值 -
This approach deduces the missing value which makes the best of all information in time zone of missing point
建立前向灰預測和後向灰預測模型，充分利用缺失值時區窗口內的全部信息對其進行推理。 -
Represents a missing value in the
信息中的缺少值。 -
This paper also studies in detail the problem of building concept lattice, and two efficient algorithms are developed. moreover, several extended model of concept lattice are presented to handle the problems in data processing, such as the missing value and the structured domain of attribute
此外，本文還對概念格的快速生成演算法進行了深入的研究，提出了一些高效的演算法，文章的最後提出了幾種概念格擴展模型，處理了數據中可能出現的缺值和結構化屬性值域的問題。 -
The value means that the query cost would on average drop by this percentage if this missing index group was implemented
該值表示如果實現此缺失索引組，則查詢成本將按此百分比平均下降。 -
After that, we analyze the internal resources and capability of the hs - sysway company by radar chart and value chain etc. then we analyze the advantage and disadvantage of the holding chances and cutting threaten, using the vrio frame. the results are following - the main advantages for hs - sysway are : its support for capital and tobacco market, ierp ( developed independently ) and differentiation, erp ' s marketing capability, technique development capability, local costs and services etc. ; the main disadvantages are : the strategy orientation is unclear and carried out weakly, low level management, persons with high ability are short of or missing, weak maturity and difference of products, short of core technology and capability etc. on that basis, we analyze the stakeholders and specify the task of the company ; we use the swot analysis and large tactic matrix etc. and bring forward the basic strategy of the development that is the aggressive strategy
其後，運用雷達圖分析、價值鏈分析等方法對企業內部的資源與能力進行了分析，然後利用vrio框架，對企業能夠用以抓住機會、削減威脅的優勢及弱點進行了分析，得出宏聲新思維公司的主要優勢是宏聲集團的資金及煙草市場支持、自主開發的ierp及其差異化、 erp營銷能力、技術開發能力和本地化的成本及服務等，主要弱點是戰略定位不清晰且貫徹不力、管理水平低、高素質人才匱乏且有流失、產品成熟度和差異性不高、缺乏核心技術與能力等。 -
Then, with the author ' s study, this disquisition finds that at present science communication of china still gives priority to science propaganda and scientists propaganda, and there have been prodigious successes in them. but this science communication is still not comprehensive. finally, the author introduces the cause of the distortion in science communication of china : it has such reasons as the channel to avoid the diverge in value judgment missing passage clear, the lack of the judgment between the authority guide in opinion and the public, the default of communicator between organize delimitation, the absence of public sphere in science communication
通過分析，本文得到如下結論和啟示：目前我國的科學傳播仍以科學宣傳和科學家宣傳為主，並在某些科學宣傳中取得較大成功，但還缺乏完整意義上的科學傳播；就傳播要素而言，我國的科學傳播尚存在幾個比較突出的問題，即彌合價值判斷分歧的途徑不暢通、意見領袖的權威導向與公眾判斷互動存有不足、組織界限溝通者缺位、科學傳播的公共領域出現缺失。 -
This problem may be compounded by applications that use values such as 00 or 99 as “ missing ” value indicators
有些應用程序用諸如00或99之類的數字來表示空值的時候可能遇到這個問題。 -
Missing value estimation for microarray expression data based on weighted regression
基因表達缺失值的加權回歸估計演算法 -
Important missing aspects are : turbulent flow, numerical discretization techniques specially the relevant and difficult topic of numerical treatment of advection and related numerical methods of solution, variable property fluids, boundary layers, stability, etc. rather, it focuses on more primitive and fundamental issues of numerical treatment of advective equation and proper formulation of initial boundary value ( ib vp ). numerical problems associated with advective dominated transport include spurious oscillation, numerical dispersion, peak clipping, and grid oriention. however, the key of numerical solution of three - dimensional advective problem is searching for a high - precision interpolating function, which can keep the computational stability and low damping
3 、針對三維純對流方程提出了實用的擬協調單元模式，並與線性插值模式和協調單元模式比較后表明，在物理量大梯度變化的情況下，線性插值模式會產生較大的數值阻尼，導致解的失真；協調單元模式具有極高的計算精度和良好的計算穩定性，還可較好地克服數值阻尼，但由於計及物理量的二階導數項，計算工作量大，邊界條件給定尚存在一定的困難；而擬協調單元模式不僅具有協調單元模式計算精度高的優點，還避免了物理量的二階導數項，可大大地減少計算工作量。 -
According to forrester, disjointed or missing sub - disciplines within an overall management portfolio can adversely affect an organization s value
根據forrester ，缺少整個管理投資組合中的分支或分支脫節會對組織的價值產生反面影響： -
Nulls are used in a database to indicate an unknown or missing value
Null用於在數據庫中指示未知或缺少的值。 -
Or you might use the nil attribute defined in xml schemas to indicate a missing value
或者使用xml模式中定義的nil值來表示忽略的值。 -
Gets a value indicating whether the column contains non - existent or missing values
獲取一個值，該值指示列中是否包含不存在的或缺少的值。 -
Gets a value indicating whether the column contains nonexistent or missing values
獲取一個值，用以表示列中是否包含不存在的或已丟失的值。
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