efficient statistic 中文意思是什麼
efficient statistic
解釋
有效統計量-
An efficient wind field simulation technique for wind - induced vibration analysis of long - span bridges is first introduced in this paper ， and the statistic characteristics of the simulated wind field are then discussed on this basis ， the time - domain expressions for the buffeting and self - excited forces acting on long - span bridges are further given a simple and practical method is presented for the non - linear parameter identification involved in the calculation of self - excited forces by using the above theory ， the wind field and aerodynamic forces acting on the hong kong ting kau bridge are obtained the time - domain buffeting response analysis of the bridge shows that the analytic results agree quite well with the experimental ones this indicates that the theory presented in this paper has reached a practical level
介紹了一種快速高效的用於大跨度橋梁風致振動分析的風場模擬方法，並對模擬風場的統計性質進行了討論和驗證在此基礎上進一步給出了大跨度橋梁抖振力和自激力的時域表達方式，其中針對自激力計算中涉及的參數識別問題，提出了一種簡單實用的非線性參數識別方法本文採用上述理論，獲得了作用於香港汀九大橋上的風場和氣動力，據此對大橋進行的抖振響應時域分析表明，計算結果與風洞試驗結果吻合良好，說明文中述及的這套理論已達到實用的階段 -
In order to analysis the paleo - current effectively on the conglomerate, i proposed a method that can be carried out by orthogonal photo in field and statistic analysis at room. it has been improved to be efficient and veracity, especially for the case that the states of gravels can not be measured directly
為了更有效的分析古流向，對礫巖發育地層，提出了野外正射投影照相?室內統計計算的方法，該方法能提高工作效率及分析準確性，尤其適用於野外不易直接測量產狀的細礫巖層。 -
Based on the analysis of crop structure and crop yield according to the statistic data in 1949 ~ 2000 year. the total water consumption of main crops and the amount of rainwater utilized have been calculated. the rapid increase in water demand for crops production after the late eighties is the one of main reasons of the water resources crisis in baoding area. the efficient precipitation, the water demand and the deficiencies of main crops in different typical years and in different growth period in baoding plain have been studied in detail. the factors of water use efficiency of different crops have been put forward through the analysis of test data in typical year
本文利用保定市1949 2000年主要農作物的種植面積與產量統計資料，在分析了歷年種植結構變化、單產變化的基礎上，明確了歷年糧食總產變化情況，計算了歷年糧食生產的總需水量及其變化；根據農作物的雨水資源的變化規律，分析了歷年用於糧食生產的有效降水量；得出了保定市農業用水量從90年代中後期大幅度增加而有效降雨量的明顯減小，是造成保定市水資源供需矛盾突出的主要原因之一。 -
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。 -
Multisensor distributed data fusion has many practical applications, and it is a focus in technological fields. this paper deals with multisensor distributed statistic decision and multisensor distributed estimation fusion. we get some results : in multisensor distributed statistic decision, we consider multisensor distributed neyman - pearson decision with correlated observation data and suggest an efficient algorithm to search for optimum local compression rules for any fixed fusion rule
本文在多傳感器分散式統計判決和多傳感器分散式估計融合方面進行了較為深入的研究，主要取得的成果為：在多傳感器分散式統計判決理論方面，對在相關觀測下，固定融合律的多傳感器分散式二元neyman - pearson判決，給出了最優分站壓縮律的不動點類的必要條件和相應的離散迭代演算法，並討論了演算法的收斂性。 -
The direction of arrival and time of arrival statistic for circular and elliptical vector channel model are derived, and efficient methods are give that can be used to simulate these models. the benefits of using adaptive antennas are also studied for 3g mobile radio system based on td - scdma. hi this thesis, these benefits are explained theoretically and illustrated by computer simulation
然後用矩量法和等效網路方法分析了自適應陣列的互耦特性，建立了考慮互耦后的陣列信號接收模型，考察了計入互耦后music來波估計演算法性能，並給出了一種基於music演算法的互耦矩陣求解方法。
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