Wave energy conversion mechanism for marine surveying platform

本发明属于水下机器人工程领域，具体地说是一种用于海洋测量平台的波浪能转化机构，包括壳体、对称安装在壳体两侧的多个翼板及位于壳体内的翼板运动调节控制机构，其中壳体两侧相对称的翼板之间通过旋转轴转动安装在壳体上，所述旋转轴上安装有随旋转轴一起转动的挡块，在旋转轴上套设有使翼板复位的扭转弹簧；所述翼板运动调节控制机构为位于壳体内的挡板，该挡板通过安装在壳体上的调节螺栓支撑，所述挡板位于挡块的下方，随旋转轴转动的挡块通过与挡板接触对翼板的转动限位。本发明具有操作简单，故障率低，安全可靠，可调节，成本低等优点

Wave energy transformation mechanism for marine measuring platform

本实用新型属于水下机器人工程领域，具体地说是一种用于海洋测量平台的波浪能转化机构，包括壳体、对称安装在壳体两侧的多个翼板及位于壳体内的翼板运动调节控制机构，其中壳体两侧相对称的翼板之间通过旋转轴转动安装在壳体上，所述旋转轴上安装有随旋转轴一起转动的挡块，在旋转轴上套设有使翼板复位的扭转弹簧；所述翼板运动调节控制机构为位于壳体内的挡板，该挡板通过安装在壳体上的调节螺栓支撑，所述挡板位于挡块的下方，随旋转轴转动的挡块通过与挡板接触对翼板的转动限位。本实用新型具有操作简单，故障率低，安全可靠，可调节，成本低等优点

生态穿梭育种在油菜品种选育中的应用

为筛选广适性早熟高油品种,在不同生态环境条件下穿梭选育甘蓝型油菜,通过对多年(2001-2013年)生态穿梭育种在品种选育中的成效进行总结,结果表明育种材料平均含油量呈现上升趋势,而且随着穿梭育种时间的推移,表现为张掖试验点含油量高于大荔试验点,到2013年选育出含油量达63.8%的新特高油种质材料,在所审定的油菜品种中均突出了高含油量的特点;而且育种材料的生育期也较穿梭育种之前缩短;在对冬油菜的穿梭选育中,选出了适应于春油菜区的油菜品系;部分细胞质雄性不育系表现出了生态型雄性不育的特点,有利于安全制种。因此利用不同生态区的环境条件穿梭选育油菜育种材料,可有效创制出优良种质资源,特别是对甘蓝型油菜的高含油量资源创制、早熟性材料的选育、广适性品种选育等方面有明显效果,同时可利用"高油种质+化学杀雄"的模式测配杂交组合,选育高油强优势油菜品种

The Prevalence of HEV among Pigs and Cattle

目的 探讨戊型肝炎病毒(HEV)在猪和牛群中的感染情况。方法 用抗-HEV抗体试剂盒检测猪和牛血清中的抗体;对部分血清用逆转录聚合酶链的方法(RT-PCR)检测HEV RNA,并对PCR阳性产物进行克隆测序,然后将序列进行分析。结果 281份猪血清中有235份为抗-HEV抗体阳性,阳性率为83.6％;其中56份血清中有3份为HEV RNA阳性,序列分析显示从猪中克隆的3株序列(SB 2、SH1和SJ 14)之间在ORF 2(6007-6354bp)区域的核苷酸序列的同源性为83％～86％,该3株序列在ORF 2区与1,2,3,4型的同源性分别为74％～79％、73％～77％,73％～76％和83％～93％;190份牛血清中有12份为抗-HEV抗体阳性,阳性率为6.3％。结论 HEV在猪和牛群中均有流行,但在猪群中的流行率明显高于牛群。猪感染的HEV的基因序列与人群中散发性戊型肝炎病毒的4型同源性最高。Objective To investigate prevalence of HEV in pigs and cattle. Methods The and - HEV antibody was detected in sera collected from pigs and cattle with anti - HEV EIA.HEV RNA was detected using RT- PCR with ORF 2 primers.The positive PCR products were cloned and sequenced.The sequences were compared with the reported HEV isolates. Results 235 of 281 pigs' sera were positive for anti - HEV antibody.3 of 56 pigs sera were positive for HEV RNA.The sequence analysis showed that the identity at nucleotide level was 83% - 86% among them.They had 74% - 79%, 73% - 77%, 73% - 76% and 83% - 93% identity to genotypes 1, 2, 3 and 4 respectively in this region. 12 of 190 cattle' s sera were positive for anti - HEV antibody. Conclusion The prevalence of HEV is much higher in pigs than in cattle. HEV sequences isolated from pigs belong to HEV 4 isolated from patients with acute hepatitis

A UNIVERSAL AUTOMATIC FILM MEASURING SYSTEM

自动通用胶片判读仪是一种高智能化的精密光学测试设备,采用了计算机控制飞点扫描技术、精密光学测量技术、图象跟踪测量与信息处理技术。飞点管分辨率达4096×4096象元,通过光学系统胶片上获得6.55μm高分辨率,飞点扫描方式灵活多样且可随意控制,通用于目前我国靶场所有的电影经纬仪和高速摄影机35mm胶片的数据判读。具有自动判读和半自动判读两种工作模式,自动判读的速度为5帧/秒,自动判读的精度为σ=±0.011mm,半自动判读的精度为σ=±0.009mm,测量数据可以记录、打印和显示

Hot spots growth on single nanowire controlled by electric charge

Hot spots - a kind of highly active site, which are usually composed of some unique units, such as defects, interfaces, catalyst particles or special structures - can determine the performance of nanomaterials. In this paper, we study a model system, i.e. "hot spots" on a single Ag nanowire in the galvanic replacement reaction (GRR), by dark-field microscopy. The research reveals that electric charge can be released by the formation reaction of AgCl, and consequently the electrochemical potential on Ag nanowire drops. The electric charge could induce the reduction of Ag+ to form the "hot spots" on the nanowire during the GRR. The appearance probability of "hot spots" is almost even along the Ag nanowire, while it is slightly lower near the two ends. The spatial distance between adjacent "hot spots" is also controlled by the charge, and obeys a model based on Boltzmann distribution. In addition, the distance distribution here has an advantage in electron transfer and energy saving. Therefore, it's necessary to consider the functions of electric charge during the synthesis or application of nanomaterials