water quality criterion 中文意思是什麼
water quality criterion
解釋
水質標準-
Quality criterion of water and steam for generating unit and steam power equipment
火力發電機組及蒸汽動力設備水汽質量 -
Two methods were used to provide water quality ratings in bio - assessment using biotic index ( bi ), ( 1 ) using the sampled sites meet the criteria for undisturbed and minimally impaired conditions, the confidence in the distribution of bi value for the 75th percentile to be used as the criterion dividing " unimpaired " form " impaired ". any values below the 75th percentile were considered as " excellent ", and values above the 75th percentile, was quadrisected for different water quality ratings
採用兩種方法研究m指數劃分水質級別的標準： （ 1 ）無污染樣點的m指數值法，以75分位數值作為最清潔水質標準，將高於此值的可能分佈范圍一等分，分別代表不同的水質級別zk ）所有樣點（污染與無污染樣點）的bi指數值法，以5分位數值作為最清潔水質的標準，將高於此值的可能分佈范圍4等分，分別代表不同的水質級別。 -
Zhang lixia ( water conservancy engineering ) supervised by professor shi kebin this paper mainly discussed a method for multi - goal network ' s optimization. since the network plan was brought forward, the criterion for evaluating network was time cost resource all along. in this paper, through massive study on achievements the predecessors had done the author posed a new criterion : quality, and set up the network ' s quality model ; simultaneously, the author established the network ' s multi - goal model by synthesizing the existing optimum models, also found the finite not bad solution of the model ; because the four goals was in contradiction with each other, using the multi - goal decision theory can optimize the network project scientifically and objectively
本文在對前人關于網路計劃研究結論的總結分析的基礎上，探討了評價網路計劃優劣的各準則，提出一種新的評判準則：工程質量，並建立了網路計劃的工程質量模型；針對目前網路計劃多是單目標的優化，綜合網路計劃就各目標優化方法的研究理論，建立了網路計劃的多目標模型，並將工程質量模型融入其中，根據網路計劃的特點，解出該模型的有限個非劣解；由於各優化目標之間的矛盾性、不可公度性，用多目標決策理論的方法，科學而客觀地對網路計劃進行了多目標優化，從而避免了人為決策的盲目性、主觀性。 -
The super entropy produce criterion is a good tool to judge the system ' s abrupt change from a lower grade to a higher one. in this paper the entropy of the urban resource - environment system was defined, and in an example of its application the super entropy produce criterion of the urban resource - environment system reflected the real developmental process of the whole system. furthermore, in this paper, a new model for the grid size optimization of the finite element method ( applied to the water quality modeling of the topographically complicated river ) was brought forward based on the maximum information entropy theory in condition that the length of gird was given
超熵產生判據為我們提供了判斷系統從低級有序向高級有序突變過程的工具，本文提出了城市資源與環境系統熵的定義，在實例中的應用證明城市資源與環境系統的超熵產生判據較好地反映了整個系統的演化情況；另外，本文針對在城市復雜河道情況下，利用有限單元法求解河流水質模型時網格單元大小難確定的問題，引入網格信息熵的概念，提出了有限單元法求解河流水質模型的網格優化方法。 -
Assessment criterion of metrology accreditation for quality test institute of water resources
水利質量檢測機構計量認證評審準則 -
Based on the criterion of maximizing the total average signal to interference plus noise ratio ( sinr ), the optimal subchannel allocation strategy is obtained in theory when random signature sequences are used. for its implementation, an iterative algorithm is proposed, which is similar to the water filling principle. by using the proposed algorithm, we obtain significant improvement on the performance of the system, and the transmission quality can be guaranteed
根據最大信號干擾加噪聲比原理，分析得出了隨機特徵碼條件下最優的子通道分配策略，並提出了一種類似於灌水原理的子通道分配演算法，該演算法能在保證各個用戶傳輸質量的前提下，使系統的整體性能接近最優。
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