1 and ( a2 ) are fulfilled , and , in addition , the second - order derivative ( x ) exists and is bounded , and let then theorem 6 . 1 let { xn , n > 2 } be stationary na sequence with identical distribution , satisfing assumption of theorem 4 . 1 , then for all x c ( ( z ) ) , we have 三2为同分布na随机变量序列，满足条件ai （ n ）和az ，进一步设川叫非降或非升，且存在口0 ，使得太以丫1 ，则对八x ）的任一连续点。有人一）一j （ x ）
Since theoretical and applied research on prepayment base on westen countries are not applied to china , the dissertation is absorbed in chinese consumers " character , and put forward a prepayment model , by which we can get average life of pools of mortgage . further more , compared with several mbs valuation methods , the dissertation advances an approach for our own mbs valuation by improving " 12 - year average life assumption model " 在借鉴国外相关研究成果的基础上，本文从我国具体国情出发，分析了目前影响我国借款人提前还款的因素，并结合我国居民的消费行为特点，提出了我国住房抵押贷款实际清偿年限预测模型，为mbs定价打下基础。通过对国外几种mbs定价方法在实际运用所需满足条件的比较分析，本文选取第12年提前还款假设定价法作为我国mbs的基本定价方法，并对其加以改进，构建出我国mbs的定价模型。
As a result , ( i ) let k ( x ) be the function assign to each point x of m the infinimum of the sectional curvatures of m at that ponit , if k ( x ) satisfies , then m is totally umbilical . ( ii ) let q ( x ) be the function assign to each point x of m the infinimum of the ricci curvatures of m at that ponit , if q ( x ) satisfies q > 1 / 4 ( n - 2 ) ( c + 4h2 ) - 1 / 4nc , then m is totally umbilical , ( iii ) let a be the square length of the second fundermental form , if satisfies , then m is totally umbilical ) )中具有非零平行法平均曲率向量的紧致全实伪脐子流形m ~ n ，得到了( ? )如果m ~ n在其点x的截面曲率的下确界函数k ( x )满足条件：则m ~ n是全脐的( ? )如果m ~ n在其点x的ricci曲率的下确界函数q ( x )满足条件：则m ~ n是全脐的。 ( ? )如果m在m中的第二基本形式h长度的平方满足条件：则m ~ n是全脐的。
An off - line algorithm of constrained model predictive control based on piecewise - linear feedback control law is presented to solve its potentially high on - line computational demand . the piecewise - linear feedback control law is off - line computed by lmi optimization problems and the on - line control computation reduces to the simple evaluation of the defined piecewise linear function , which makes the online computational efficiency significantly improved . 4 针对预测控制滚动优化命题的在线计算任务大，作者提出了一种基于分段反馈的离线预测控制算法，通过离线求解线性矩阵不等式优化命题构造分段反馈控制律，在线运行时只需实施满足条件的反馈控制律，极大地提高了控制器在线计算效率。
So at first in this paper , a disk - based xml data storage structure ldf & b based on f & b index is proposed . on one side , ldf & b wipes off the redundancy existing in traditional storage structure which stores the same value information repeatedly ; on the other hand , the index on the tape and the inverted index introduced in this storage structure enable nodes with the same property to be clustered when stored on disk , and enable nodes satisfied with the query to be searched effectively . that is to say , ldf & b can support xml query processing effectively 为此,本文首先提出了一种基于f & b索引的xml数据的磁盘压缩存储结构ldf & b ,其优点在于:一方面, ldf & b摒除了传统存储方法中相同的值信息重复存储带来大量冗余的问题;另一方面,该结构引入的同带索引与反向索引结构将具有相同性质的节点聚集在一起,使得可以快速的定位到满足条件的节点集,很好的支持了其上的查询处理。
Economy analysis is the most concerned one of the five principles above by the owners of the realties , thus the plan for hvac systems with the character of the lowest annual energy consumption usually wins . ventilation systems of public kitchen should be paid great concern 在上述五项原则中，经济性原则是建设单位最为关心的，也是设计人员重点考虑的原则，在其他各项原则满足条件的前提下，应该采用年经常费用法对各备选方案进行分析，取年经常费用最低的方案作为优选方案。
Since there is a primary key on both columns of the main table , and the select joins on the first column and has a predicate on the second , you might expect that db2 would fetch the one row that qualifies from the main table and would therefore not be held up by the lock from the second session 由于在main _ table的两列上有一个主键，并且选择在第一列上进行联接，并有一个针对第二列的谓词，您可能会认为db2会从main _ table中提取满足条件的一行，因而不会被第二个会话中的锁所阻塞。
This thesis analyzes in detail the security of the elliptic curve discrete logarithm problem , and proposes principles of establishing safe elliptic curve cryptosystem against the present attacks . elliptic curve cryptosystem is based on appropriate elliptic curves , this paper also explores the present approaches to finding appropriate elliptic curve in terms of algorithm , and finds that they are complex and unfit for choosing elliptic curves with higher security . therefore , this thesis proposes a method of r & e ( random & extension ) with a relative less complex algorithm in time and space , and finds out a close elliptic curve accordingly . then studies how to choose coefficients of elliptic curves 建立椭圆曲线密码体制的基础是有一条合适的椭圆曲线，在对已有的寻找椭圆曲线的方法后进行算法分析后，发现这些方法的算法复杂度较高，随着今后安全要求的提高，不适合用来选取椭圆曲线，因而提出了r & e ( random & extension )方法，该方法在算法的时间和空间复杂性上都比较低，并用它找到了一条近似满足条件的椭圆曲线，同时对椭圆曲线的系数的选择作了研究。
Based on the image structure , this paper establishes three representation results for recovering contraction inference relations which satisfy the conditions cl , cr1 and dr respectively by the standard epistemic agm states . a unique technique and uniform proofs to represent these contraction relations are adopted , which could overcome the core objection in previous description of contraction relations 基于图像结构这个概念，我们在文中利用标准认知agm状态建立了三个分别满足条件cl , cr1以及dr的可恢复收缩后承关系的表示定理。事实上，在文中我们采用了独特的技巧以及统一的证明方法表示了这些收缩关系，而采用统一的方法这一点恰好能克服以往众多有关收缩关系表示定理的建立方法中最主要的弱点。
The thesis is composed of three sections : firstly , with the back looking of domestic agricultural backgrounds , the dissertation , by the analysis of agricultural agreement on domestic agricultural rules , first defines the space of chinese agriculture support , and makes clear that the main policies of chinese agricultural support are focused on " green box " measures and adequate de minimis support 论文由三部分构成：在对农业国内支持背景进行回顾的基础上，首先通过对农业协定国内支持规则的解读，界定了我国农业国内支持空间，明确了我国农业国内支持措施主要集中于“绿箱”措施和满足条件的微量支持措施。
