充分研究

In the present paper,a sharp inequality is obtained between the Ricci curvature and the squared mean curvature of semi-invariant submanifold s in cosymplectic space forms,and some conditions are reached to make the equality hold.

对余辛流形的半不变子流形进行研究，利用曲率的分量表示之间的简单的代数关系，得到了这类子流形的R icc i曲率与平均曲率平方之间的一个不等式，并讨论了等式成立的充分必要条件

The Jacobi matrix rank one update problems, given either their mix-type eigenpairs or their pricinpal submatrix and defective eigenpairs(the eigenvalues of the matrix and some elements of the corresponding eigenvectors) are also discussed.

n阶对称箭形矩阵与n阶Jacobi矩阵一样只有2n-1个非零元素，类似Jacobi矩阵逆特征值问题的提法，本文提出并讨论了六类对称箭形矩阵逆特征值问题，研究了这类矩阵的结构性质，得到了问题有解的充分必要条件及求解的数值算法和数值算例。

The content of nightmares is given unusually detailed attention, and the latest science on nightmares is succinctly reviewed.

噩梦的内容得到充分的研究，在此领域的科研成果也受到简单回顾。

However, the central cardiovascular functions of hydrogen sulphide are not fully identified.

中枢内硫化氢是否参与心血管活动的调节目前尚未得到充分的研究。

Three typical terrains are simulated using wave superpose method based on the work of full exploration of terrain model and its realization Effect of wavelet number on simulation result is studied, the results indicate that satisfactory results can be obtained by selection of a certain wavelet number.

在充分探讨了地形模型和随机过程实现的基础上，采用波叠加法仿真了3种典型地形。研究了子波数对仿真结果的影响，说明选取一定数目的子波即可得到满意的结果。

The bionic model in the networked manufacturing is studied and the characteristics of networked manufacturing such as openness, unification of the diversity and stability, unification of rival and cooperation, cooperative competition, self-organization and supersystem integration are expounded.

应用共生理论研究了基于网络企业群体的协同进化机制，网络中信息的导航江大学俗士学位论文：邱络化制迫的芳干理论与方法研兜和集成、企业信誉机制的建立能促进连续共生和对称性互惠共生关系的形成，使网络在信息交流方面的优势得到充分利用，形成良好的基于网络的企业生态系统。

Due to the influence factors including geological conditions, the pressure of water curtain, air pressure in surge chamber and properties of rock masses and so on are taken into account, the water-air two-phase flow model proposed in this paper may provide a new idea for the design and remediation of the air-cushioned surge chamber.

由于水-气二相流模型可以充分考虑调压室地质条件，水幕的压力，气室气压及围岩性质等因素的影响，为空气损失评估、水幕设计及对漏气严重的调压室进行修补提供了新的研究思路。

Both sufficient criteria are studied further in Chapter 4. It is proved that they are equivalent to the injection and surjection of some maps.

第四章研究了判别FA是弱可逆和弱逆的充分条件，证明这些条件与一类映射为单射或满射是等价的。

Study has been carried out to reduce cost, simplify process and improve and stabilize the product property according to sufficient analysis of the property of the current synthetic brake shoes with high friction factor both at home and abroad. Phenolic resin,butadiene nitrile rubber powder, graphite,sylvine feldspar, alumine, BaSO4 are used as main materials and dry process is employed in the study.

在充分剖析目前国內外高摩擦系数合成闸瓦性能的基础上，以酚醛树脂、丁腈橡胶粉、石墨、钾长石粉、铝矾土、硫酸钡等为主要原材料，采用干法工艺，围绕降低成本、简化工艺、提高并稳定产品性能等方面开展研究。

The spatial,temporal and two-dimensional niche breadths and niche overlaps of Hyalopterus amygda/i, Myzus persicae and their main natural enemies were studied in this paper. The results showed that the synchronism and sympatry of the pests and their natural enemies Harmonia axyridis, Propylaea japonica and Chrysopa septempunctata were both higher, which provided a foundation for protecting and using natural enemies to control the two pests.Key words: Hyalopterus amygdali; Myzus persicae; Natural enemies; Ecological niche

为了保护利用天敌，充分发挥天敌对害虫的自然控制作用，作者对桃粉蚜、桃蚜及其主要大敌在时间维度、空间维度和时—空二维生态位宽度和生态位重叠进行了研究，评价了4种主要大敌异色瓢虫、龟纹瓢虫、大草岭、蜘蛛对这2种害虫在时间和空间上的跟随作用和控制效果，为桃园桃粉蚜、桃蚜两种害虫的生态控制提供理论依据。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。