Note that in some cases , publishing a pointcut for external use encourages structuring code in a particular way so that a simple pointcut definition can be exposed that represents a sequence of join points in the implementation 注意,在某些情況下,發布切點供外部使用需要以特殊方式對代碼進行結構化,從而暴露簡單切點定義以表示實現中的一系列連接點。
Genes coding mature peptide of igfs were achieved by pcr using another pair of oligo - nucleotide primers to induce to the suitable restriction enzyme site , and the igf - i product of pcr contains 230 base pairs . igf - ii contains 219 base pairs . 3 各另外設計一對特異性pcr引物,導入適當限制性內切酶切點,以上述連有目的基因的克隆載體為模板,采用pcr方法擴增基因片段,獲得長度約230bp的igf -和219bp的igf -成熟肽基因序列。
The great tour purchasing power is the drive power of promoting the region ' s tourism developmentln the regional space , scale economic and regional separation are one of the basic characteristics of promoting tourism industry , so we must arrange the regional tourism industry with a systematic method and give prominence to the central city . for its outstanding area in the regional space , central city has evident superiority in the regional ecnomic development , and has echelon between central city and its periphery scennic spots , which is the inducement mechanism of tourism industry ' s arranging , developing and advancing step by step . for the law of diminishing marginal utility and the theory of equilibrium , the max utility equilibrium of tourism consumption be at the point of tangency of undiscrepancy curve and the cost budget curve 中心城市居民巨大的出游力是拉動其周邊旅游地發展重要的內在驅動力;由于地緣關系,區域規模經濟與地域分割并存,是旅游產業運動的一個基本特征,為此必須對區域旅游經濟進行系統化布局,突出中心城市的產業中心性;因其區位條件獨特,中心城市在區域經濟發展中居于明顯的優勢,與周邊城鄉部位存在經濟發展上的梯次性,這種梯次性是區域旅游生產力布局、產業發展梯次傳動,最終整體聯動的經濟誘導機制;根據邊際效用遞減規律和旅游者最大效用均衡理論,旅游消費效用最大化的均衡在無差異曲線與開支預算線的切點(即旅游目的地選擇的最佳位置)上,且隨著邊際效用遞減,目的地選擇的最佳位置向遠離中心城市方向移動,這就是中心城市與周邊旅游地互動關系的經濟學解釋。
The first part is introduction , presenting this paper ' s structure , research background and so on ; the second part introduces some issues relating closely to risk , the tangency point between indifference utility curve and efficient frontier is the optimal portfolio ; the third part explores risk evaluation , this part begins with some risk factors affecting security ' s price and return , then analyzes the methods evaluating degree of risk , finally , introduces a more popular method of risk evaluation - - var ; the forth part expounds risk management , this part studies some risk control strategies correspond to specific risk mentioned above ; the last part put forward some advice contrapose issues existed in risk management in china 第一部分為緒論,介紹本文的相關背景;第二部分是與風險相關的幾個問題,等效用曲線與有效邊界的切點是投資者選擇的最佳投資組合;第三部分是風險衡量,該部分首先分析了證券與股票所面臨的風險,然后對債券和股票分別介紹,最后介紹了目前比較流行的風險衡量方法? ? var方法;第四部分為企業風險管理,這里針對上文所述的風險提出相應的風險控制策略;第五部分針對目前我國風險管理中存在的問題提出了幾點建議。
Moreover , i make the positive analysis with the actual date of our security market . by means of quadratic programming , i get the efficient convex and portfolio at the point of tangency . through the aggression , i get the portfolio of sim at the point of tangency 在此基礎上使用我國證券市場的實際數據,運用二次規劃方法求解了馬柯維茨有效邊界和切點組合;用回歸的方法求解了單指數模型的切點組合;用二步回歸的方法初步檢驗了資本資產定價模型;使用三業績指數,對我國的基金進行業績評級。