sharp ratio 中文意思是什麼
sharp ratio
解釋
回報風險指數-
Polarization diversity and maximum ratio combining ( mrc ) is used to restrain the sharp signal fading in the telemetry systems, in which the object is in flight at a high speed and rotating and in low elevation
在信號極化衰弱現象嚴重的環境中對快速飛行目標、低仰角運動目標以及旋轉運動目標等進行遙測接收時，極化分集最大比合成技術可以有效的改善接收性能。 -
Since financial reforms were brought out in china 20 years ago, the state - owned commercial banks have a expansion in financial assets and liabilities during this period. with the sharp increase of financial assets gross, the domestic banks are encountering a series of difficulties, such as high ratio of default loans, the slower turnover ratio of funds, the lower profitability, and the weak ability of self - development
金融改革二十年來，國有獨資商業銀行金融資產與負債總量經歷了一個迅猛的擴張期，在量的擴張背後也存在深層次的問題，特別是國有獨資商業銀行不良貸款比率較高、資金周轉速度減慢、經濟效益下降、自我發展能力不足等問題。 -
Entropy of an image is to express the smoothness or homogeneity of the image. while computing in a local window, if there exist edges, the local image will not be homogenous, variation of the grayness will be sharp and the entropy obtained will be low. otherwise, the entropy will be high. given the threshold of entropy, it can be determined whether or not exist edges. because entropy operator is sensitive to noise, the effect is bad if it is directly used to detect edges. in view of the deficiency, the paper comes up with an edge detection method in which entropy operator is combined with noise removal. if the entropy computed is higher than the threshold, it will be necessary to determine whether it is caused by noise or by edges. thus edge detection and noise removal can be made at the same time. with this method satisfactory effect has been achieved by experimenting upon image with low ratio of signal to noise
圖像的熵用來刻劃圖像的平滑性或均勻性.在圖像的局部窗口中計算時，如果窗口中存在邊界，則窗口中的圖像不均勻，其灰度變化急劇，計算出的熵小；反之熵大.設定熵的閾值，即可判斷是否存在邊界.由於熵運算元對噪聲很敏感，直接用它進行邊界檢測，效果很差.文中針對這一缺陷，提出將熵運算元與去噪相結合的邊界檢測法，如果計算出的熵大於閾值，要判斷是噪聲的出現所引起，還是邊界的出現所引起，這樣，邊檢測邊界邊去噪聲.用該方法對信噪比較低的圖像進行實驗，得到了滿意的效果 -
Nowadays the research on the performances of security investment funds in china is mainly concerned with two aspects. the one is the feasibility of the theoretical model of performances and the simple computation by means of indicator formulation, which can be used to compute certain performance indicators, such as average profit rate per week, p coefficient, johnson coefficient, sharp ratio, var, average profit rate per week / var and etc. the other one is the research on the degree to which funds holdings are concentrated and research on the tendency of industry selection in the portfolios of funds managers. every part of market is trying to connect the portfolios selection of funds managers with the mar ket focuses and development directions, hoping that it can lead to the conversion and maturity of the ideas of market investment
目前，對于中國證券投資基金績效的研究與評估，基本上圍繞著兩個方面，即績效理論模型的可應用性探討或簡單的指標公式套算，計算某些績效指標，如平均周收益率，貝塔系數，詹森系數，特雷諾系數，夏普系數， var和平均周收益率var等幾項指標；和對基金持股集中度的研究，以及由此引伸的對基金經理的投資組合中的行業選擇傾向的研究，市場各方一直在試圖將基金經理的投資組合選擇與市場熱點和發展方向連接起來，並希望籍此引導市場投資理念的轉變與成熟。 -
This article introduces three foreign " classical " fund performance measurement models, including sharp ratio, treynor ratio and jensen index. based on that, it manages to explore the evaluation method which is suitable for current chinese funds market situation, that is weighted index
本文介紹了國外三大「經典」基金業績評價模型，即夏普業績指數、特雷諾業績指數、以及詹森業績指數，並在此基礎上探索得出適合我國基金市場現狀的業績評價方法? ?加權指數法。 -
Ceramic capacitor occupy the largest ratio in capacitor. chip capacitor present the new trend. the market of disc ceramic capacitor is severe and full of sharp competition
瓷介電容器在電容器中占據最大比例，片式電容器成為發展趨勢，圓片瓷介電容器市場嚴峻，競爭激烈。
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