sff

Recently the research of Satellite Formation Flying ( SFF ) has increased significantly .

目前关于卫星编队飞行的研究有显著的增加。

To solve this problem , the paper focuses on the theory and methods for attitude coordination control of SFF .

本文研究了编队卫星的姿态协同控制理论和方法。

Results The penetration quality of SFF group formed from cuneiform liner is powerful .

结果由楔形罩形成的扇形自锻破片束侵彻性强。

Implementation of SFF - 8070i in USB mass storage communication

SFF-8070i在USB块存储通讯中的实现

Reconfiguration of SFF with micro-thruster and simple four-impulses is discussed respectively .

研究基于微推力和简单四冲量控制的编队构形重构技术。

Oocyte Control of Proliferation and Differentiation of Bovine Granulosa Cells in Serum-free Culture System ; Effect of OCS and SFF on the in Vitro Mature and Fertilization in Sheep

发情牛血清和绵羊卵泡液对绵羊卵母细胞体外成熟和受精的影响

The characteristic and potential advantage of SFF is that several following-satellites along with the leader-satellite in close vicinity make up a special formation to accomplish certain mission .

多颗从属卫星（从星）在近距离内与主卫星（主星）组成特定的队形以完成相应的任务，是卫星编队飞行的特点及潜在优势。

As the second-generation technology of GBIC , SFX mainly includes the encapsulation solution of SFP / SFF , which is an innovation on the interface technology of optical-fiber network .

SFX为第二代GBIC技术，主要包括SFP/SFF封装方案，是光网络接口技术上的一项创新。

The recent decades have witnessed active studies in attitude coordination control of spacecraft formation flying ( SFF ) for its significant roles in missions such as synthetic-aperture radar imaging and space-borne interferometry .

编队卫星的姿态协同控制在合成孔径雷达成像和空基干涉测量等任务中起着重要的作用，近年来备受关注。

Eighty-eight cases of fresh SFF treated non-surgically were randomly divided into two groups ( 44 cases each ): the prevented treated by LMWH for 14 days and the control not receiving LMWH ;

将88例非手术治疗的新鲜髋骨骨折患者随机分为对照组及预防组。预防组44例给LMWH共14天，对照组不用LMWH。

The key technologies for extracting rotor position are also described , such as delay circuit , synchronous frame filter ( SFF ), and phase locked loop ( PLL ) based on heterodyne method , then make compensation for the rotor poles .

随后对转子位置信息提取的关键技术进行了详细介绍，即延时电路，同步轴系高通滤波器及基于外差算法的锁相环电路等。

For its advantages in technology and its vast field of application , Spacecraft formation flying ( SFF ), a new mode of spacecrafts motion , has been a hot point since it appeared and is called as a kind of technology that representing the developing trend of space technology .

航天器编队飞行是一种新的航天器空间运行模式，凭借其巨大的技术优势、广阔的应用前景，从诞生之初就倍受青睐，被称为代表未来航天发展趋势的技术。

The objective of the paper is to study the therapeutic effect of low molecular weight heparin ( LMWH ) on the prevention of lower-limb deep venous thrombosis ( DVT ) in senile femoral fracture ( SFF ) and the dynamic changes and clinical significance of plasma coagulation factors .

为探讨低分子量肝素（LMWH）在预防老年性髋骨骨折后下肢深静脉血栓（DVT）中的作用及血浆凝血因子的动态变化和临床意义。