一类食饵具有性别结构的非自治两种群捕食系统研究

讨论了一类具有食饵补充且食饵具有性别结构、捕食者具有阶段结构的非自治捕食者-食饵系统．运用Liapunov函数方法,得到了该系统一致持续生存的充分条件．该模型的周期系统在适当的条件下存在唯一、全局渐近稳定的周期解．对更具普遍意义的概周期系统,也得出了概周期正解唯一存在且全局渐近稳定的充分条件．     

基于反凸规划的两层线性规划问题全局最优解算法

利用两层线性规划的全局最优解可在其约束域的极点上达到这一性质,通过对问题可行解集合的结构进行探讨,将两层线性规划转化为带有反凸约束的线性规划,建立了一个新的全局解算法,证明了算法能收敛到问题的全局解,并通过一个算例说明了算法的求解过程．     

基于累积切片的多元响应降维子空间估计

将相关研究提出的累积切片均值估计(CUME)、累积海塞方向(CHD)应用到多元响应降维子空间的估计中并对估计量加以改进得到改进的多元累积切片估计(g-CUME)、多元累积海塞方向(g-CHD).     

Economic Development and the Industrial Allocation of Foreign Capital

１ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｔｈｅｅｃｏｎｏｍｉｃｄｅｖｅｌｏｐｍｅｎｔｏｆａｃｏｕｎｔｒｙ，ｔｈｅｒｅａｒｅｎｏｒｍａｌｙｔｗｏａｄｊｕｓｔｉｎｇｗａｙｓｏｆｔｈｅｉｎｄｕｓｔｒｉａｌｓｔｒｕｃｔｕｒｅ，ｉ．ｅ．：ｉｎｃｒｅｍｅｎｔａｌａｄｊｕｓ...     

Copulas Between Wealth and Lifetime

The life insurance industry is very interested in how a person’s lifetime is related to his wealth with financial advisors interested in how even a person’s portfolio choice affects his lifetime. This paper presents a statistical analysis combined with intuitive relationships between lifetime and wealth. Key properties of this relationship are given and then various copulas are analyzed to see whether they have these properties. Other advantages and disadvantages of these copulas for describing the dependen...     

Input-Occupancy-Output Techniques and Its Application in Studyon China's Economic Goals for A.D.2030~1

ＩｎｐｕｔＯｃｕｐａｎｃｙＯｕｔｐｕｔＴｅｃｈｎｉｑｕｅｓａｎｄＩｔｓＡｐｐｌｉｃａｔｉｏｎｉｎＳｔｕｄｙｏｎＣｈｉｎａ’ｓＥｃｏｎｏｍｉｃＧｏａｌｓｆｏｒＡ．Ｄ．２０３０１ＣＨＥＮＸｉｋａｎｇＩｎｓｔｉｔｕｔｅｏｆＳｙｓｔｅｍｓ，Ａｃａｄｅｍｉ...     

城乡规划类专业制图软件比较分析

提高学生实验应用技能是高等学校教学改革的重要内容之一。重点分析了AutoCAD、Photoshop、Corel draw、Mapin-fo、Arcgis等城乡规划类专业制图软件的优劣势。提出了制图课程教学改革的相关对策建议:加强师资队伍建设,及时进行制图课程教学改革,加大实验室建设投入,最终达到提高城乡规划类专业学生制图操作技能之目的。     

Prediction of efficient outputs based on GM（1,N） model and weak DEA efficiency

This paper expresses the efficient outputs of decisionmaking unit(DMU) as the sum of average outputs forecasted by a GM(1,N) model and increased outputs which reflect the difficulty to realize efficient outputs.The increased outputs are solved by linear programming using data envelopment analysis efficiency theories,wherein a new sample is introduced whose inputs are equal to the budget in the issue No.n + 1 and outputs are forecasted by the GM(1,N) model.The shortcoming in the existing methods that the for...     

Componentwise Asymptotic Stability of Continuous-Time Interval Systems

A special type of asymptotic (exponential) stability, namely componentwise asymptotic (exponential) stability for the continuous-time interval system is investigated. A set-valued map that represents the constraint of the state of the system is defined. And, by applying the viability theory of differential equation, sufficient and necessary conditions for the componentwise asymptotical (exponential) stability of this kind of systems are given.