为解决遥感相机在运动过程中的抖动造成的图像位置偏移问题,提出了一种实时图像校正算法。由于在FPGA中采用HDL进行算法设计难度大、开发周期长,故设计中采用了c语言进行算法设计,然后借助calypto公司的catapult c Synthesis工具将抽象...
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为解决遥感相机在运动过程中的抖动造成的图像位置偏移问题,提出了一种实时图像校正算法。由于在FPGA中采用HDL进行算法设计难度大、开发周期长,故设计中采用了c语言进行算法设计,然后借助calypto公司的catapult c Synthesis工具将抽象的c设计转换成硬件RTL代码。在catapult c Synthesis中对设计的算法进行了c/c++、RLT协同仿真测试,并在Xilinx Xc5VLX110T型FPGA上进行了验证。仿真测试及硬件验证结果表明,采用catapult c Synthesis设计的算法在时序、性能方面均满足设计要求,能够对偏移的图像进行实时校正。
The decline in reproductive capacity is one of the first signs of aging and represents a considerable health problem in modern societies such as canada with an increasing maternal age. To prepare for challenges brough...
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The decline in reproductive capacity is one of the first signs of aging and represents a considerable health problem in modern societies such as canada with an increasing maternal age. To prepare for challenges brought up by older maternity, there is a need to understand the biology of reproductive aging at the molecular level. For instance, what are the biochemical signatures associated with aging oocytes that precede and predict the incipient loss in fertilizing ability in these cells? The simple nematode c. elegans has a short reproductive span during which it displays a corresponding drop in oocyte quality overtime thus providing a tractable and relevant model to study germ cell aging. Here, FTIR (Fourier Transform Infrared) microspectroscopy was systematically applied as an imaging platform to address in vivo changes in the macromolecular composition of c. elegans oocytes transitioning from reproductive to post-reproductive stages. Using this pioneering experimental approach optimized to image c. elegans cells, a marked increase in lipid and protein signatures consistent with an altered mobilization of yolk (lipoprotein) was detected in old wild-type oocytes. These results were corroborated using standard fluorescent and transgenic techniques demonstrating a spike in lipoprotein storage in aged oocytes. Finally, a bona fide mutant defective in yolk import served as a proof of method to validate the usefulness and reliability of FTIR microspectroscopy as a mapping tool to quickly and reproducibly draw the biochemical landscape of aging oocytes. Overall, this exploratory study supports a role of lipotoxicity in driving oocyte aging and provides an integrated experimental approach for further studies aimed at dissecting the molecular underpinnings behind reproductive decline in germ cells.
目的：探讨初次发病的中青年急性期进展性脑梗死患者血清 c 反应蛋白（cRP）、血浆纤维蛋白原（Fib）、D-二聚体（DD）水平。方法选择42例初次发病的中青年急性期进展性脑梗死（PIS 组）患者作为研究对象，并对其血清 cRP、Fib、D-二聚...
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目的：探讨初次发病的中青年急性期进展性脑梗死患者血清 c 反应蛋白（cRP）、血浆纤维蛋白原（Fib）、D-二聚体（DD）水平。方法选择42例初次发病的中青年急性期进展性脑梗死（PIS 组）患者作为研究对象，并对其血清 cRP、Fib、D-二聚体的水平进行测定，选择同期收治的90例初次发病的中青年急性期非进展性脑梗死（非 PIS 组）患者作为对照组，另外选择50例同期进行健康体检者（健康对照组）进行对照。结果PIS 组 cRP 为（3．764±0．832）mg／L，Fib 为（3．994±0．851）g／L，DD 为（1．560±0．225）μg／mL；非 PIS组 cRP 为（2．573±0．657）mg／L，Fib 为（2．468±0．739）g／L，DD 为（0．740±0．162）μg／mL；健康对照组 cRP为（1．725±0．326）mg／L，Fib 为（2．103±0．584）g／L，DD 为（0．450±0．131）μg／mL。各组 cRP、D-D 相比较差异均有统计学意义（cRP：PIS 组与非 PIS 组 t ＝8．89，PIS 组与健康对照组 t ＝13．99，非 PIS 组与健康对照组t ＝8．55，均 P ＜0．01；D-D：PIS 组与非 PIS 组 t ＝23．82，PIS 组与健康对照组 t ＝29．46，非 PIS 组与健康对照组t ＝12．59，均 P ＜0．01；非 PIS 组 Fib 与健康对照组比较 t ＝2．85，P ＜0．05，PIS 组与非 PIS 组 t ＝10．06，PIS 组与健康对照组 t ＝13．48，均 P ＜0．01）。结论初次发病的中青年急性期进展性脑梗死患者血清 cPR、Fib、D-D水平升高促进脑梗死进展加重。
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