更替測驗 的英文怎麼說

中文拼音 [gēngtìcèyàn]
更替測驗 英文
alternative test
  • 更 : 更副詞1. （更加） more; still more; even more 2. （再,又） further; still further; furthermore
  • 替 : Ⅰ動詞1 （代替） replace; substitute for; supply [take] the place of 2 [書面語] （衰敗） decline Ⅱ...
  • 測 : 動詞1. （測量） survey; fathom; measure 2. （測度; 推測） conjecture; infer
  • 驗 : 動詞1. （察看; 查考） examine; check; test 2. （產生預期的效果） prove effective; produce the expected result
  • 更替 : replace; supersedure; take turns; substitute
  • 測驗 : test; trial run; examination; testing
  1. The ids works by two way, misuse detection and anomaly detection, misuse detection flags an intrusion on intrusion signature, this kind of detecting technic can be realized much more easily, and much more accurate, but it can not find some intrusiones that have been disguised or new kinds of intrusion. the anomaly detection can detect in more wide field, anomaly detection can compare new statistic data with average record, then anomaly record will be found, but it ' s more difficult to set a threshold, if the threshold is too big, some intrusion may be put through, if the threshold is too small, the ids will give more false positive alarm, and the threshold will be different with different people or different period, so the ids just simply show us their suspicious record, the administrator or expert will be in duty to analyze this record and give conclusion, the ids give more alarm than it should, leave us more detection record to analyze, and this is a hard work, we can not distinguish an intrusion or not if we analyze only one record, but we can judge if we find the relation among mass detection evidence. in this article, we try distinguish an intrusion using d - s theory ( proof theory ) instead using manual work, the ids will be more helpful and efficient

    濫用檢測採用的是特徵檢測的方法，實現較為簡單，判斷的準確性較高，但是不能判斷一些經過偽裝的入侵或特徵庫中尚未包含的入侵，異常檢測能夠根據以往記錄的特徵平均值，判斷出異常情況，但是對于異常到什麼程度才視為入侵，這個閥值非常難以確定，閥值設定的太高，有可能漏過真正的入侵，如果設定的閥值太低，又會產生較高的誤警率，而且這個閥值因人而異，因時而異，因此現在的入侵檢測系統把這部分異常記錄以一定的形式顯示出來或通知管理人員，交給管理人員去判斷，而這些ids系統難以判斷的記錄，如果對每個證據單獨地進行觀察，可能是難以判斷是否是入侵，而把許多先後證據關聯起來，專家或管理人員根據經驗能夠判斷訪問的合法性，本文試圖引入人工智慧中證據理論的推理策略和示例學習方法，代替人工檢查分析，可以提高效率，降低誤警率，並可以對一個正在進行得可疑訪問實現實時檢測，通過搜索及時判斷，及時阻斷非法訪問，比事後得人工處理更有意義。
  2. The problem of doa ' s estimation of multiple source signals incident on a arbitrary array in the presence of both unknown spatially correlated noise and sensor errors is firstly considered. a modified ml estimation of doa ' s and sensor gain errors is presented. unlike previous work, the proposed method does not impose any structure constraints or parameterization of the signal and noise covariances. the algorithm can be carried out via the alternating projection approach. finally, the performance of the proposed method is shown with computer simulations as well as real array data

    在空間相關色噪聲環境及存在陣列模型誤差情況下，首先給出了基於最大似然的doa及陣列幅相誤差聯合估計演算法，該演算法對信號和噪聲無任何約束，且適用於任意陣列結構。演算法可以利用交替投影迭代搜索實現，計算機模擬實驗和外場實測數據表明，本章演算法能給出比傳統的最大似然方法更高的估計性能。
  3. The performance metrics, access latency, throughput, hr hit ratio and bhr byte hit ratio are analyzed and discussed. simulations show that compared with caching only model, iwpcm can further improve the throughput, hr and bhr efficiently and reduce the access latency. the performance evaluation based on the spn model can provide a basis for implementation of web prefetching and caching and the combination of web prefetching and caching holds the promise of improving the qos of web systems

    對于緩存命中率和位元組命中率等性能指標，使用基於一階ppm prediction by partial match預測演算法，通過四種典型的緩存替換策略gdsf greedy dual size frequency ， gdsize greedy dual size ， lfu least frequently used ， lru least recently used在僅緩存模型和一體化模型中的應用驗證了一體化模型比僅緩存技術具有更好的性能。
  4. A group of 18 leading european pharmaceutical companies and clinical research organisations backed the scrapping of “ acute toxicity tests ”, which have long been conducted in rodents to identify the minimal lethal dose of an experimental drug while universally applied in the past to win regulatory approval, the companies concluded that the tests, first introduced in 1927, had been superseded by others that were more accurate and were therefore no longer needed as a precondition for launching drug tests in humans

    18家有影響的歐洲制藥公司和臨床研究組織支持廢棄"急性毒性試驗" ，長期以來，在急性毒性試驗中，嚙齒類動物被用於確認實驗性藥物的最小致死量在過去，急性毒性試驗普遍用於申請新藥試驗許可，公司認為1927年發明的試驗方法，現在可以由其它更加準確的方法代替，因此不再作為新藥測試的必要前提。
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