Rotor-bearing system based on test aerodynamic properties of device for rolling bearing

本发明属于轴承的动力特性测试技术领域，特别涉及一种基于转子‑轴承系统测试滚动轴承动力特性的装置。包括底板及设置于底板上的电机组件、联轴器、加速器、待测轴承组件、轮盘、传动轴、转速传感器、位移传感器及同轴度传感器，其中传动轴两端由对称分布的两个待测轴承组件支撑、且传动轴的一端通过联轴器与加速器和电机组件相连，轮盘套设于传动轴上、且随传动轴一起转动，转速传感器和位移传感器分别用来测量转子‑轴承系统的转速和传动轴的位移，同轴度传感器用于测量传动轴上各部件的同轴度。本发明结构简单、易于操作可准确测算出待测轴承的动力特性，并作为建立滚动轴承动力特性数据库的基本手段

一种用于火箭发射工况的航天载荷减振箱

本发明属于振动控制及减振技术领域，特别涉及一种用于火箭发射工况的航天载荷减振箱。包括箱体、一级减振结构、二级减振结构、宏操作器、箱体安装工装及加速度传感器，其中箱体的底部通过一级减振结构与箱体安装工装连接，宏操作器通过二级减振结构设置于箱体的内部，一级减振结构用于减弱高频的振动响应，二级减振结构用于减弱低频共振响应的振动，加速度传感器设置于宏操作器上，用于在相应振动工况下采集振动信号。本发明通过二级被动减振技术能对试验仪器有效的进行减振，有效保护了试验仪器，该减振箱设计及其测试方法能给相关领域提供借鉴，对于空间科学载荷发射段的减振防护起到关键性的作用

Space truss and spaceflight payload structure

本发明涉及空间桁架和航天载荷结构，具体地说是一种用于太空作业的空间桁架和航天载荷结构。包括箱体结构和空间桁架，所述空间桁架的一端与箱体结构的底部固定连接，另一端与工装连接，所述箱体结构的外壁上设有约束阻尼层。所述空间桁架包括长管组件、短管及连接方块，多组长管组件通过连接方块连接，形成多节的方形或三角形框架，相邻两个连接方块通过与长管组件垂直的短管连接。本发明具有优良的减振性能，可以通过改变粘弹性阻尼层的厚度、材料、敷加位置和敷加面积来达到最佳的减振效果，箱体结构内装有精密的光电学仪器，供宇航员进行太空作业

用于空间科学实验柜的动力吸振器阵列

本实用新型属于减振控制技术领域，特别涉及一种用于空间科学实验柜的动力吸振器阵列。动力吸振器阵列包括空间科学实验柜及设置于空间科学实验柜上的多个电子学、热控抽屉，空间科学实验柜的后侧设有与各电子学、热控抽屉相对应的抽屉安装板，抽屉安装板上间隔设有多个动力吸振器结构，动力吸振器结构包括由内至外依次设置的阻尼层、约束层及硬涂层。本实用新型对空间科学实验柜整体结构无改变，结构形式合理，吸振效果明显，大大减小空间实验柜的振动响应

Genetic variation of Phragmites australis and its relationship with salinity in the coastal wetland of Yellow River Delta

Investigating plant genetic diversity can provide basic knowledge for vegetation conservation and ecological restoration. Leaves of 280 individuals from seven Phragmites australis populations in the Yellow River Delta were sampled. We analyzed the genetic structure and diversity of seven P. australis populations at 12 loci using microsatellite markers,and analyzed the relationship between genetic diversity and salinity. Results showed that the genetic diversity in these P. australis populations was low. The Nei's genetic diversity index (H) ranged from 0.077 to 0.107 and the Shannon information index (I) ranged from 0.133 to 0.185. However,the genetic diversity of two populations from high marsh was relatively high (H= 0.101-0.107,I = 0.176-0.185) . The genetic divergence of these populations was low (GST = 0.062) ,with most of them coming from intra-population. Moreover,there was no significant relationship between genetic distance and geographic distance (r = 0.026,P = 0.354) . However,the relationship of genetic diversity and salinity was positively significant (R_(adj)~2 = 0.597,P = 0.026) . These results suggested that P. australis populations from tidal marsh in the Yellow River Delta should be protected and that seedlings or propagules from populations of other regions could be used to enrich genetic diversity of P. australis in the degraded wetland during restoration