xi n 中文意思是什麼

xi n 解釋
扣人心弦
  • xi : n. 希臘字母表第十四個字母〈Ξ,ξ〉。
  • n : 1. 【羅馬數字】90〈N＝90000〉。2. 【化學】＝nitrogen. 3. ＝North（ern）。N ＝nuclear 核的：N-waste 核廢料。
  1. Part two introduces the theory of panel data. the basic form of panel data is : yi t = it + xi t it + uit, i = 1, 2, …, n ; t = 1, 2, …, t panel data is used for describing the instance of swatch in a collectivity in some time, and observing every unit in swatch multi - scale. basing on the different hypothesis of ui, panel data has fixed effect model and random effect model, if ui is a unit constant ( corresponding to the dummy variable of

    基於分析結果，本文給出了改革我國公司治理結構的若干建議: （ 1 ）股權性質方面，培育有效的國家股持股主體; （ 2 ）股權結構方面，逐漸調整股權結構，減少第一大股東持股比例，增加除第一大股東以外的大股東的股權集中度; （ 3 ）董事會方面，採取奇數型董事會規模，並完善獨立董事的生成機制; （ 4 ）激勵制度方面，應加大董事及總經理的持股比例。
  2. This paper also points out the consistency that can be generalized more than one dimension. so, we achieve the large sample property - consistency of this class of model on the fixed design. in this paper, for fixed design points xi ; under the assumption that the unknown function g is continuous function and the moment of random error exists and is finity, we discuss and show that the estimators n, gn and n2 for, g and 2 have strong consistency, p th - mean consistency for more general nonparametric weighted fuction

    本論文在x ；是固定設計的情況下，假定未知函數9 （ ? ）連續，對非參數權函數的條件更為一般和基本，並對隨機誤差e ；的矩的要求有限，討論並證明了在這些條件下， p ； g （ ? ）的估計量札lin （ ? ）及誤差方差a 』的估計量枯相合性和叭三2 ）階平均相合性
  3. So many statistics scholars have studied it extensively and obtained many ideal results. semiparametric regression model yi ~ ( n ) = xi ~ ( n ) + g ( t ~ n _ i ) + _ i ~ ( n ), 1 i n, where g is an unknown function on a compact set a in r ~ p and is an unknown parameter, ( x _ 1 ~ ( n ), x _ 1 ~ ( n ) ) ~ t, ? ? x _ n ~ ( n ), t _ n ~ ( n ) ) ~ t are fixed design vectors and the radom er - rors _ i ~ ( n ) are assumed to be an l ~ q - mixingale sequences. fan [ 1 ] investigated nonparametric regression model

    由於半參數回歸模型的優點是集中了主要部分（即參數分量部分）的信息，因而它比傳統的線性模型或非參數回歸模型有更強的解釋能力，不少統計學者對其進行了深入的研究，同其它回歸模型一樣，它的大樣本性質始終是人們關注的熱點。
  4. Let f be a field and charf = p = 3. in this paper the generators of modular simple lie superalgebras w, h, s, k and ho of cartan - type are determined. their derivation algebras and their dimensions are determined, also. the main results are following : ( l ) let t = { xki | 1 < i < m, 0 < ki < 3ti }, s = { xi | m + 1 < i < s }, then t sgenerates k ( m, n, t )

    設f是特徵p = 3的域，本文決定了f上有限維cartan型單李超代數w型， h型， s型， k型和ho型的生成元和它們的導子代數及其維數
  5. The basic idea of the estimate method is, firstly, based on the linear model yi = x ' i + ei, defining the least square estimator n of the linear model for the unkown parametric ; secondly, using the estimator n we " ve got to substitute for in the original semiparametric regression model yi = x ' i + g ( xi ) + ei and using the usual nonparametric weighted function method to define the estimator gn ( - ) for the unknown function g ( ) ; finally, defining the estimator 2 for the unknown variance of errors 2

    其估計方法的基本思路是先基於線性模型y _ i = x _ i + e _ i ，定義未知待估參數的估計即此線性模型的最小二乘估計（ ? ） _ n ；然後將所得估計（ ? ） _ n代入原半參數回歸模型中，用一般的非參數權函數方法定義未知函數g （ ? ）的估計（
  6. Dna fingerprints of 13 colonies of 5 strains, including 5 balb / c, 2 balb / c - nu / nu > 4 c51 1 cba / n and 2 dba / 2 from 7 factories of laboratory animal in the beijing and xi ' an areas, were studied with jl - 2 mulilocus probe and southern hybridization and the author compared the dna fingerprint with the biochemical marker enzyme method. it indicated that the fingerprint had 17 - 22 distinguishable fragments and these fragments had high polymorphisms. the fingerprints of balb / c and balb / c - nu / nu, which were abnormal at the hbb site with the biochemical marker enzyme method, was different from their normal groups

    實驗採用jl - 02多位點探針對北京和西安地區較大的7家實驗動物生產供應單位的5個balb c群， 2個balb c - nu nu群， 4個c _ （ 57 ）群， 1個cba n群和1個dba 2群近交系小鼠進行了dna指文圖分析，並與常規生化標記分析法進行了比較，結果顯示：所產生的dna指紋圖的圖帶數均在17 - 22條，具有良好的多態性。
  7. Through analysis and study, it is believed important and feasible that the implemented projects, the importing feng jia - shan reservoir into yang mao - wan reservoir and the water supply from shi tou river to xi ' an city ; form the synthetic analysis of the main factors - quantity, time, apace and user " character, it can be conferred that it is not necessary for the four projects in the western areas to join together at present ; adding gate at the 2 head of lin jiacun trench can only help to relax the problem of lack of water in bao jixia irrigation area, to solve the problem of short of water in the irrigation area needs to take project measures at the trunk and branches of wei he river from lin jia village to the upper stream ; the mode of supplying water of the four projects in the western areas are all by gravity, they can only be supplied one way and ca n ' t be supplied each other

    通過分析研究認為：已實施的引馮濟羊工程和石頭河西安供水工程，是十分必要的和可行的；從水資源配置的主要要素? ?數量、時間、空間和用戶性質的綜合分析研究來看，西部四大工程目前尚無整體聯網的必要；林家村渠首加閘對解決寶雞峽塬上灌區缺水僅能起到緩解作用，從根本上解決塬上灌區的缺水問題，還必須從林家村以上渭河干支流上採取進一步的工程措施；西部四大工程均為重力供水，只能單補，而不能互補。
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