在第一章中我们给出了本文所需用的一些基本定义，以及给出了有关投射模、IF环和半单环等的一些重要已知结论。
In chapter one, we provide some basic known definitions and important conclusions of projective modules, IF rings and semi-simple rings, and so on, which are needed in the paper.
生物质颗粒机分为平模生物质颗粒机和环模生物质颗粒机。
Biomass pellet mill can be divided into flat die biomass pellet machine and ring die biomass pellet machine.
真空气淬是提高环模表面质量和内在质量的重要热处理工艺手段。
Vacuum Gas - quenching is an important means to improve the external and internal quality of circular mould.
分析了模头流道结构和熔体在圆环型材挤出模中的流量，为环类型材挤出模设计提供了依据。
Analyzing the die channel structure and the melt flow of the circle profile in the extrusion die provides the basis of the die design for the circle profile.
对交换环定义了广义p F环的概念，即一切具有常数秩的有限生成投射模都为自由模的交换环。
A generalization of PF rings relative to commutative rings: rings all finitely generated projective modules with constant rank of which are free is defined.
研究主理想环上模的矩量问题，包括矩量问题的存在性和唯一性。
This paper considers the moment problem for modules over principal ideal domain containing existence and uniqueness of solution.
提出了一种具有自动变模控制的快速全数字锁相环。
A fast all digital phase-locked loop with automatic modulus control is presented.
通过对消音器后环箍弯曲成形模的设计，介绍了考虑弹复补偿后，较大圆筒件成形模具的设计分析和模具结构。
Through the design of bending die for the back hoop of silencer, die design analysis and die structure for large cylinder part considering springback compensation was introduced.
本文定义了模的一种新的环变换，讨论了它的一些基本性质，并且给出了由诱导函子引起的环变换下的一个模的同构定理。
This paper defines a new transformation of modules, discusses some of its basic characteristics, and proposes a modular isomorphic theorem of the ring transformation caused by induced functors.
类似于群分次环和群分次模的定义，定义了部分半群分次环和部分半群分次模。
Similar to group graded rings and modules, partial semigroup graded rings and modules are defined.
分式环和分式模以及与之相关的局部化方法是交换代数中一个重要工具。
The fractional ring(module)and the interrelated localization method are the important tools for commutative algebra.
针对滑差频率矢量控制交流调速系统，提出并设计一种模糊滑模控制算法对速度环进行控制。
An algorithm for fuzzy sliding mode control was proposed for AC speed drive with a slip frequency vector control.
应用MATLAB分析了影响锁相环快速锁定的主要因素，提出了一种具有高精度自动变模控制的快速全数字锁相环。
The primary factor affecting fast phase lock is analyzed by using MATLAB. Then a fast all digital phase locked loop with a high precision automatic modulus control is proposed.
再者，引进了分次半平坦模的概念，并有如下主要结果：环K是分次弱正则的当且仅当所有右K-模是分次半平坦的。
Next, the concept of graded semiflat module is introduced and proved that K is a group-graded weakly regular ring if and only if all right K-module is graded semiflat module.
本文给出并证明了右遗传、右完备环上投射模的对偶模仍然是投射模。
This Paper gives and proves the dual module of a projective module over aright hereditary and right perfect ring is stil projective.
为了获得稳定的谐波锁模脉冲，分析了有理数谐波锁模的理论和非线性放大环镜的传输特性。
To achieve a steady harmonic mode-locked pulse (HMLP), the theory of rational harmonic mode-locking and the transmission characteristics of a nonlinear amplifying loop mirror were analyzed.
对主动锁模光纤激光器的锁相环进行改进，提出一种新型的“变带宽锁相环”的设计结构。
This article presents a new design structure of variable bandwidth phase-locked loop based on improving phase-locked loop of actively mode-locked fiber laser.
对一般群分次环建立了弱分次周期根的概念，证明它是一个分次特殊根，给出了它的分次模刻划，讨论了它与自反周期根的关系。
The weakly graded periodic radical concept for general group graded rings is established, the fact that it is a graded special radical is proved and its graded module characterization is presented.
本文给出p—遗传环的定义及循环模的子模闭的充要条件。
This paper gives the definition of P-hereditary ring and discusses the necessary and sufficient condition about the submodule closure of cyclic module.
概型上的拟凝聚层和凝聚层分别起着环上的模和有限生成模的作用。
Since quasi-coherent sheaves and coherent sheaves on a scheme behave as modules and finite-generated modules on a ring, respectively.
小型全封闭式氦气压缩机是G-M制冷机的配套设备，广泛应用于空间环模设备、真空低温泵、真空镀膜等。
Small totally enclosed helium compressor is a componend equipment of G-M refrigerator. It is widely used in space environment simulation equipments, vacuum cryopump and vacuum coating equipments etc.
在分析环槽形内侧凹塑件结构特点及模具设计方案的基础上，设计了此类塑件的注射模。
Based on the analysis of the structure characteristics of the plastic product with inner concave loop slot and the mold design projects, an injection mold for this kind of part was designed.
软件实现了调速系统的双闭环调节，其中速度环采用滑模变结构控制，电流环则是经典的PI控制。试验结果说明该调整系统有较好的动态和静态性能。
The software comes true the double closed loop regulator, therein the velocity loop is the variable-structure control, and the current loop is the classical PI control.
最后对根投射模的自同态环进行了讨论。
Finally, the endomorphism ring of radical-projective modules is discussed.
利用有限元分析法对环模的疲劳寿命进行研究，为环模设计提供了一种新方法。
The life of the biomass pelletizing loop-die is studied using finite element method, and it provides a new method to study loop-die life.
本发明涉及一种高强高模杂环芳纶的制备方法，包括从聚合到纺丝再到后处理的整套生产方法。
The invention relates to a preparation method of a high-tensile high-model heterocycle aramid fiber, which comprises an integrated production method from polymerization, spinning to post-process.
本论文针对沙漠环境模拟实验室（简称“环模室”）设计了由上位机（PC）和下位机（PLC）构成的控制系统方案。
Firstly, the dissertation presents the design of automatic control system which consists of PC and PLC for the laboratory of desert environment simulation;
导出了介质环加载波导与光壁波导连接处的模转换计算公式。
This leads to transformation formulas for the connecting boundary of the dielectric ring loaded waveguide and smooth walled waveguide.
清洁、大抽速真空系统是现代空间环模设备中必不可少的组成部分之一。
Vacuum system of oil free and high speed is an integrated component of a modern large simulator.
清洁、大抽速真空系统是现代空间环模设备中必不可少的组成部分之一。
Vacuum system of oil free and high speed is an integrated component of a modern large simulator.
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