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The first part presents develops of predator-prey systems and gives the model that is investigated in our paper; Chapter 2 presents the results on boundedness of solutions and permanence of system; In chapter 3, we explicitly derive a domain of attraction for the positive equilibrium of system by using Liapunov method; The local stability and the conditions that Hopf bifurcation occurs are obtained in chapter 4; In chapter 5, some explicit fomulae of the direction of Hopf bifurcation and the stability of bifurcating periodic solutions on the center manifold are determined,using normal form and center manifold introduced by Hassard et al; In chapter 6, some numerical simulations are performed to illustrate the analytical results found; Our paper ends with a brief conclusion.

全文共分七章，第1章对捕食-食饵系统的发展背景做了介绍并给出了本文研究的模型；第2章讨论了系统的保持性和解的有界性；第3章研究正平衡点的全局性质，对正平衡点的吸引域进行了精确估计；第4章研究了系统的正平衡点的局部稳定性和Hopf分支存在的条件；第5章利用规范型和中心流形定理得到了一个决定Hopf分支方向、分支周期解的稳定性及其他性质的精确公式；第6章对一个具体模型进行了数值模拟；第7章对全文进行了总结。

After compensation of continuous motion of the platform and time difference between upslope and downslope signals for imaging, the moving target can be detected through displaced phase center antenna technology.

提出了一种利用三角波调制调频连续波进行地面高速运动目标检测的新方法，根据三角波调制调频连续波正、负调频导致动目标成像结果在径向反向移动的特点，通过对正、负调频信号分别成像，在补偿了载机平台的连续运动以及正、负调频信号之间的时间差对图像的影响后，将两幅图像通过偏置相位中心天线处理，检测出高速动目标。

Then we prove the one-to-one corresponding relation between 3-coloring of inducing four regular graph and 4-coloring of maximal planar graph and find out the relation between three colors of inducing four regular graph and three dual bi-chromatic subgraph of maximal planar graph.

本文给出了极大平面图的导出四正则图的两种构造方式、等价性及性质，证明了导出四正则图的三着色与原极大平面图四着色的一一对应关系，并且找出了导出四正则图的三种颜色与原极大平面图四着色的三组对偶二色子图之间的关系。

The construction procedures used to establish the theory are based on orthogonal and elementary matrix transformations and can, therefore, be developed to a numerically efficient algorithm.

第一部分，我们想利用状态和微分回馈控制把一个时变周期离散的系统正则化，在这部分我们找到一个可以正则化的充分条件，并利用构造方法证明在这充分条件之下可以构造出状态和微分回馈控制矩阵，使的这周期闭回路系统可以被正则化。

Results After the therapy, the sTfR and erythron increased significantly, but bone marrow iron deposits decreased progressively as HCT increased. The sTfR had a apositive correlation with RBC (r=0.632, P.01) and positive correlation with Hct (r=0.757, P.01) and positive correlation with E%(r=0.775, P.01). No correlations were observed among sTfR and other parameters.

结果 患者治疗后sTfR显著增高(P.01)；而骨髓外铁、铁粒幼细胞、SF均显著降低；红系增生较治疗前明显活跃(P.01)。sTfR与RBC呈正相关(r=0.632， P.01)；与Hct呈正相关(r=0.757， P.01)；与骨髓E%呈正相关(r=0.775， P.01)；与其他参数无相关性。

Reaction of Ni[(C4H9O)2PS2]2 with ethylamine, n-propylamine, n-butylamine, and n-amylamine have been studied by spectrophotometry in ethanol at 30℃.

用光谱法研究了NiL2在30℃时与乙胺、正丙胺、正丁胺和正戊胺在乙醇溶液中的加合反应。

In the end, there is a brief conclusion . The conclusion of this passage mainly includes: The listed companies have obvious preference for stock right financing, and the financing order is stock right financing, the short-term debt, endogenous financing, the long-term debt, which differs from that of western countries; Financing structure is characterized by comparatively lower asset-liability rate, higher floating debt and lower long-term debt; The governance structure is irrational, and the shareholders" meeting perform practically no function. In the meanwhile, board of director structure is unreasonable, which is highly coincident with the manager layer. Board of supervisors" independent character is poor, while manager layer is lacking in restraints and supervision; The interdynamic

本文的结论：上市公司有明显的股权融资偏好，融资顺序为股权融资、短期负债、内源融资、长期负债，这与西方国家上市公司的融资顺序不同；融资结构具有资产负债率相对较低，流动负债偏高、长期负债偏低的特征；治理结构不合理，股东大会形同虚设、董事会结构不合理、董事会与经理层高度重合、监事会独立性不强、经理层缺乏约束与监督；治理结构与融资策略选择的互动关系不强；独立董事比例与资产负债率正相关，工业、公用事业与资产负债率负相关，商业与流动负债率正相关，第一大股东持股比例与流动负债率负相关，第一大股东持股比例与长期负债率正相关，执行董事比例、工业、商业与长期负债率负相关。

in order to simplify a process of getting parameters of daubechies biorthonormal wavelet, according to the fourier cosine transform of scale equation of daubechies biorthonormal wavelet, an algorithm is proposed when the daubechies biorthonormal wavelet has even symmetry double scale parameters.

摘 要：为简化daubechies双正交小波因数的求解，以紧支集daubechies正交小波中尺度关系的fourier变换余弦形式为基础，提出1种当双尺度因数为偶对称时，推导daubechies双正交小波对偶尺度方程因数的方法，并给出构造数值实例。

Using developed optimal model for Ring-Pull Can size design,the optimal solution of cylindric can size design and the suboptimal solution of frustum of a cone on cylinder as well as CCB-1A can size design are botained.

建立了易拉罐尺寸设计的优化模型，得到了正圆柱形罐尺寸设计的最优解和上部为正圆台下部为正圆柱形罐以及CCB-1A型罐尺寸设计的次优解。

The main results are as follows: the relations between local fractional integrated semigroups and the corresponding Cauchy problem, global fractional integrated semigroups and regularized semigroups are given; introduction of the notion of regularized resolvent families, and the generation theorem and analyticity criterions for regularized resolvent families are obtained; the spectral inclusions between fractional resolvent family and its generator, and the approximation for fractional resolvent families in the cases of generators approximation and fractional orders approximation; elliptic operators with variable coefficients generating fractional resolvent family on L^2 by using numerical range techniques; and the L^p theory for elliptic operators with real coefficients highest order are obtained by Sobolev''s inequalities and the a priori estimates for elliptic operators; and a kind of coercive differential operators generates fractional regularized resolvent family by applying the Fourier multiplier method, functional calculus and some basic properties of Mittag-Leffler functions.

主要结论是：给出了局部分数次积分半群和相应的Cauchy问题的关系以及分数次积分半群和正则半群的关系；引入了正则预解族的概念，并给出了其生成定理和解析生成法则；给出了分数次预解族与其生成元的谱包含关系，并研究了在生成元逼近和分数阶逼近两种情况下相应的预解族的逼近问题；利用数值域方法证明了具变系数的椭圆算子在L^2上生成分数次预解族；利用Sobolev不等式和椭圆算子的先验估计证明了具变系数的椭圆算子在其最高项系数为实数时在L^p上生成分数次预解族；运用Fourier乘子理论、泛函演算和Mittag-Leffler函数证明了一类强制微分算子可以生成分数次正则预解族，并给出了该预解族的范数估计。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。