sparsity 中文意思是什麼

sparsity 解釋
稀少；稀疏
  1. This is not only because of the sparsity of the fringe.

    這不僅是由於條紋稀疏。
  2. From now on, our shop will supply you with special lotus tea which follows the ming dynasty to made. and also, you will be supplied with different kind of tea food while you enjoy the fantastic tea. because of the sparsity make a booking before you come will provide you a convenience

    由現在起每逢五六日，本坊推出按古法精製之荷花茶，連同數款啖啖茶香的精緻茶食，供各位知音品嘗，由於荷花茶製作煩瑣，數量稀少，欲品嘗者請提早訂座。
  3. This paper applies generalized multipler method to translate convex quadratic programs with equal constraints and non - negative constraints into simple convex quadratic programs with non - negative constraints. the new algorithm is gotten by solving the simple quadratic program. it avoids the computation of inverse matrix and exploits sparsity structure in the matrix of the quadratic form. the results of numerical experiments show the effectiveness of the algorithm on large scale problems

    根據廣義乘子法的思想，將具有等式約束和非負約束的凸二次規劃問題轉化為只有非負約束的簡單凸二次規劃，通過解簡單凸二次規劃來得到解等式約束和非負約束的凸二次規劃新演算法，新演算法不用求逆矩陣，這樣可充分保持矩陣的稀疏性，用來解大規模稀疏問題.數值結果表明：在微機486 / 33上就能解較大規模的凸二次規劃
  4. On the other hand, adaptive method can save running time of iterations by increasing the sparsity of markov hyperlink matrix

    另一方面， adaptive方法通過將馬爾可夫超鏈接矩陣稀疏化以達到節省迭代時間的目的。
  5. The main contents of this thesis include : ( 1 ) summarize and analysis of the theories on vibration transmission through rolling element bearings ( 2 ) based on the threshold setting and signal ’ s statistical approach, a method for solving the problems of denoise was developed ( 3 ) using sparsity and clustering, the method and hypotheses for underdetermined blind source separation was studied ( 4 ) the method based on potential function clustering was given for underdetermined blind source separation of noisy signals based on the assumption that the input distribution is sparse and the mixture procedure is linear, the attenuation matrix and the delay matrix were estimated by clustering. the approach was experimentally illustrated for the case of m = 2. the separation of the signals from bearing test bed proved that the given methods are available and reliable

    在需求分析和研究現狀分析的基礎上，本論文針對如下內容進行了重點研究: （ 1 ）以滾動軸承為例，對旋轉機械振動信號的傳輸進行了歸納分析; （ 2 ）通過設定某一門限並研究信號間的統計特性，研究了旋轉機械振動信號的盲源分離過程中噪聲消減策略; （ 3 ）應用稀疏信號分析和聚類分析方法，對盲源分離中欠確定問題的假設條件進行探討並對分離方法進行了分析; （ 4 ）採用基於勢函數聚類分析的方法，研究了欠確定前提下含噪聲測量過程中信號盲源分離方法。
  6. But with the system scale enlarging, its efficiency gradually declines and some problems such as sparsity, scalability and early rater will appear

    但隨著系統規模的擴大，它的效能會逐漸降低，暴露出矩陣稀疏性、擴展性和早期級別等問題。
  7. Sad is able to differentiate models in form of subroutines, fully exploit the sparsity of the models and need few additional operations. it is concluded that sad is very suitable for the process models that have relatively simple computational structure and consist mainly of polynomials

    符號自動微分具有可對子程序形式的函數求導、可以充分利用模型的稀疏性、無需輔助操作的優點，非常適合針對結構相對簡單、計算式以多項式為主的過程系統模型求導。
  8. In the first and second section of chapter 1 we introduce the model of dimension reduction problem, put forward the concepts of dimension - reduction function and embedding function, and make a classification for the dimension reduction problem ; in section 1. 3 we discuss " the curse of dimension " and the sparsity of high - dimensional space ; in section 1. 4 we discuss " intrinsic dimension " and its estimation based on the model of dimension reduction

    第一章首先提出了降維的模型和定義，討論了相關的問題；第三節討論「維數禍根」現象和高維空間的稀疏性，通過實例分析其對高維空間的數據分佈特性具體影響；第四節討論了本徵維數及其估計的基本問題。
  9. Stylistically, the ibm mainframe roots of rexx show in its case - insensitive commands ; and to a lesser degree in the relative sparsity of punctuation it uses preferring keywords to symbols

    在文體上， rexx的ibm / mainframe根源體現在它對命令的大小寫敏感；在某種次要程度上也體現在它使用標點符號相對較少（更多用關鍵字而不是符號） 。
  10. With the expansion of e - commerce systems, the magnitudes of users and commodities grow rapidly, resulting in the extreme sparsity of user rating data

    在大型電子商務系統中，用戶評分數據的極端稀疏，導致推薦系統的推薦質量急劇下降。
  11. Aiming at some problems of collaborative filtering technologies, we have explored item - based collaborative filtering algorithm, which solves effectively sparsity and scalability problems

    針對協作過濾方法的某些缺點，提出了一種改進的過濾演算法-基於信息項的協作過濾演算法。
  12. This one is complicated than the former. by using sparsity matrix technique and recursion, it can also be used in the larger system. the simulation system is constituted with matlab and the programs are formed with c language

    前者演算法結構簡單，便於編程實現，且計算速度快，主要適用於規模較小的系統；後者演算法結構較前者復雜，程序實現困難，但由於採用了稀疏矩陣技術，並用遞推法修正因子表，所以可以應用於規模較大的系統。
  13. Instead, there needs to store only the original coefficient matrix, some auxiliary matrices for the preconditioner and several vectors in the iteration methods. further, the core of the iteration is the matrix - vector multiplication and the solution of the auxiliary equations corresponding to the preconditioner. if the solution of the auxiliaries spend not very much, the computational cost in each iteration step will be very cheap, due to the fact that the sparsity of the matrix can be exploited sufficiently

    與直接法相比，迭代法只需存儲原系數矩陣、對應于預處理的幾個輔助矩陣與少量幾個向量，且迭代中除求解輔助線性方程組外，其餘的計算主要是稀疏矩陣與向量乘積，從而能充分利用稀疏性減少計算量，但迭代法的收斂速度一般與系數矩陣的譜分佈有關。
  14. Low density parity check ( ldpc ) codes are good error - correcting codes, which can approach shannon ' s capacity limit. due to the sparsity of its check matrix, ldpc codes can be decoded only with linear time complexity using iterative decoding algorithm. therefore, ldpc codes have become one of the most attractive fields in the channel coding community

    低密度校驗碼是一種逼近香農限的好碼，由於其校驗矩陣的稀疏特性，採用迭代譯碼演算法，它的譯碼僅具有線性時間復雜度，所以目前ldpc碼己成為通道編碼理論界的研究熱點之一。
  15. There are several problems in traditional systems from the current b2c website electronic commerce personalization recommendation system : data sparsity, the commodities which are purchased or rated by users only occupy the total commodity number about 1 % ; new project problem, the new user and the new commodity which doesn ’ t be purchased or rated can ’ t be recommended ; solely recommend means, long data processing and low recommendation precision

    本文通過對當前b2c網站的電子商務個性化推薦系統分析，發現傳統的推薦系統有如下問題:數據稀疏性問題，用戶購買或評分的只佔總商品數的1 %左右;新項目問題，對于未被購買或評分的新商品、新用戶一般不能進行推薦;推薦方法單一、數據處理耗時過長以及推薦精度不高的問題。
  16. In accordance with the problems in purifying agent market such as the sparsity of products, high treatment cost and unsatisfactory treatment effect, wealth started to cooperate with the environmental science group of wuyi university and developed a series of products with strong applicability and efficiency and gain public praise

    公司從1998年開始經銷污水凈水劑，針對市場上通用的凈水劑品種單一、處理成本高而處理效果差的特點，公司於2001年開始與五邑大學環境科學研究所合作，開發出一系列針對性強、效果好的凈水劑，投放市場后深受客戶歡迎，銷售形勢喜人。
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