共查询到20条相似文献,搜索用时 78 毫秒
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栀子药材提取工艺的近红外光谱实时控制方法研究 总被引:5,自引:1,他引:4
提出了用近红外光谱技术实时控制中药提取工艺的新方法。采用光纤近红外光谱法分析不同工艺条件下的栀子药材提取液样本,通过SIMCA方法建立了工艺稳态监控模型,用于评价26个未知样本的工艺状态,成功地判别了其中的全部异常工艺样本。结果表明,近红外光谱结合SIMCA分析方法是一种快速、方便、有效的工艺监测手段,该方法无需对指标成分进行定量,即可通过样品整体近红外光谱监控其工艺是否正常,从而为中药提取工艺的实时控制提供了一条新的思路。 相似文献
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为了适应Z箍缩物理实验的发展,研究了超细钨丝和钼丝的制备工艺、钨丝表面镀金工艺、氘代聚合物纤维制备工艺和表面纳米涂层银工艺,初步进行了导电聚合物的研究,调研了研制丝阵负载自动绕丝设备的可行性,研究了各种丝阵负载的结构及靶场安装调试工艺,完成了3轮Z箍缩物理试验用负载的制备任务。 相似文献
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针对高功率二极管封装工艺中存在的问题,提出了工艺控制方法,提高了采用微电子工艺研究中的统计过程控制技术(SPC)。所谓SPC技术的基本含义是:利用数理统计分析理论,将连续采集的大量工艺参数数据转换成信息,以确认、改善、纠正工艺过程特性,保证产品质量、成品率和可靠性。 相似文献
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二代微通道板(MCP)放气成份质谱分析 总被引:3,自引:1,他引:2
模拟二代微光管制管工艺,对MCP经不同工艺处理后的放气成份进行分析,发现工艺质量本身是造成MCP污染的主要因素.经改进工艺,提高了制管成品率和管子性能. 相似文献
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根据 HL-2M 真空室结构及运行工况,对 HL-2M 真空室制造过程的工艺难点进行了深入的分析。结
合前期试验段制造经验,优化了真空室制造工艺,细化了真空室产品的制造工艺方案。通过优化后工艺措施的实
施,提高了真空室的制造质量,并为后续磁约束聚变装置真空室的制造积累了大量的经验。 相似文献
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论述红外二级串联变像管第二级屏工艺中硝棉有机膜的配方及工艺。对滴膜工艺进行改进,提高了滴膜合格率,基本上消除了荧光屏的绝化问题。 相似文献
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Theoretical analysis for integral imaging performance based on microscanning of a microlens array 总被引:1,自引:0,他引:1
An integral imaging method based on microscanning of a microlens array is proposed. The effects of microscanning on the depth resolution and the product of depth of focus and lateral resolution squared (PDLRS) of an integral imaging system are quantitatively analyzed. Calculation results show that microscanning can improve not only the depth resolution, but the PDLRS can be increased. The amount of improvement of different microscanning modes to the performance of integral imaging is closely related to the fill factor of the detector and the diffraction factor of the microlens. 相似文献
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在自制的负离子速度成像装置上发展了负离子质谱技术.测量获得了电子贴附解离邻位二氯苯产物Cl-的0.2~8 eV效率谱,并且在两个峰位1.2和6.0 eV测量了其切片速度影像. 相似文献
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光学材料的折射率和色散系数对光学系统成像影响极大,如折射率对球差等单色像差的影响极为敏感,而色散系数则对色差有直接影响。本文将以具体产品为例.分析光学常数对折射物镜的影响。 相似文献
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传统超声彩色多普勒成像测量的是血流沿超声传播方向上的速度分量,故无法得到垂直于超声传播方向的血流。向量血流成像是一种更加先进的超声血流成像技术。它不受角度限制,可以直接计算出血流速度的大小和方向。本文总结了现有多种超声向量血流成像技术的特点和发展情况,并从产品化实现的角度分析了各项技术的优缺点。从超声系统发射接收、血流成像、向量速度方向合成、显示等几个方面详述了迈瑞超声向量血流成像技术产品化实现过程中遇到的主要问题及解决方案。实验采用了中科院声学所研制的超声多普勒仿血流体模,通过向量血流成像和脉冲多普勒成像分别测量体模的仿血流速度。将向量血流成像直接计算出来的速度值与脉冲多普勒经过角度校正得到的速度进行对比。在不同条件下,经过多次测量,二者的平均相对误差均在10%以内。 相似文献
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Two-color (or nondegenerate-wavelength) lensless ghost imaging using pseudothermal light source is investigated theoretically by use of classical optical coherence theory. We find that for two-color pseudothermal lensless ghost imaging the visibility and resolution is determined by (Δ) the product of the wavelength and the corresponding path length rather than the wavelength for each path or the path length. We also confirm our theoretical conclusion by numerical simulations. The result shows we must make a trade-off between resolution and visibility in devise practical experiments, as the resolution of the imaging can be improved by decreasing Δ but with visibility getting poor, and vice versa. 相似文献
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Three-dimensional integral imaging with large depth of focus by use of real and virtual image fields
We present an integral imaging method to enhance the depth of a three-dimensional image by displaying it throughout real and virtual image fields. When the product of depth and resolution square of the displayed three-dimensional image is used as a figure of merit in integral imaging systems, our method can maximize this merit especially when three-dimensional images with large depth of focus are displayed. The feasibility of our method is experimentally demonstrated by generation of elemental images by a computer. 相似文献
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Krishnapriya T. K. Deepti Ayswaria Chakrapani P. S. Baby Asha A. S. Jayaraj M. K. 《Journal of fluorescence》2021,31(6):1927-1936
Journal of Fluorescence - Hen’s eggshell, a biological waste product, was turned into a cell imaging probe: europium doped hydroxyapatite (HAp: Eu) nanoparticle using hydrothermal method.... 相似文献
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Coincidence, or ghost, imaging is a technique that uses two correlated optical fields to form an image of an object. In this work we identify aspects of coincidence imaging which can be performed with classically correlated light sources and aspects which require quantum entanglement. We find that entangled photons allow high-contrast, high-resolution imaging to be performed at any distance from the light source. We demonstrate this fact by forming ghost images in the near and far fields of an entangled photon source, noting that the product of the resolutions of these images is a factor of 3 better than that which is allowed by classical diffraction theory. 相似文献