共查询到19条相似文献，搜索用时 281 毫秒
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目的是研究钾钙肥中有效氧化钙的溶出规律,分别采用正交试验法和均匀设计法来进行试验,克服了单因素试验法不易考察不同因素间交互作用的缺点,得到更加全面准确的试验结论：提取液酸度是影响钾钙肥中氧化钙溶出的首要因素,振荡时间次之,两因素间的交互作用不明显,振荡温度影响可以忽略,酸度越大,振荡时间越长,氧化钙的溶出量越多。 相似文献
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以长江师范学院学生视力情况的调查分析,以眼睛近视的度数为指标,尝试分析现代学生视力的状况以及问题存在的原因,采用正交试验设计的方法,利用正交表安排试验,对试验数据进行分析,从而找出对学生视力影响最显著的各个因素的水平。 相似文献
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用正交设计方法求解非线性规划的区间约束最优化问题 总被引：1，自引：0，他引：1
给出了以正交设计原理为基础的两种方法———正交表法和加点正交表法,求解非线性规划的区间约束最优化问题。方法不要求目标函数可导,不依赖于初始点,计算速度快,算法简单,容易编成程序在计算机上执行。用检验考题对算法进行了验证,并进行了分析和探讨 相似文献
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基于正交试验设计方法,运用VisualC＋＋6．0设计开发出一个ABS控制参数分析寻优平台,其功能包括正交表设计、试验数据采集、试验结果分析和因素趋势图绘制。 相似文献
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在生产和科学研究中经常需要做试验,如何让试验次数不多,就能达到预期的目的,本文运用正交表在汽车产品中进行试验方案设计并对试验结果进行数据方差分析,以便找出达到试验的最优方案进行介绍和应用。 相似文献
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正交设计是立足于方差分析模型的,通过方差分析来估计模型中的未知参数。但是如果因素之间存在交互作用,当因素数目和因素的水平数增加的时候,未知参数的个数将呈指数增长,使得试验次数也大大增加。利用回归分析的方法需要估计的未知参数将会大大减少。本文通过二次回归来建立了正交设计的模型。 相似文献
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用均匀设计进行实验方案的设计，并用分区间优化方法进行实验结果的优化。将重油催化裂化各种产物的产率与原料油的组成、反应条件进行关联，利用人工神经网络的方法建立重油催化裂化产品产率数学模型。用均匀设计的样本对建立的模型进行训练使该模型能很好地拟合试验数据。准确反映强化添加剂在不同反应条件下对催化裂化的产品产率影响，进而得出最优配方。 相似文献
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Jiang Zou Miao Feng Ningyuan Ding Peinan Yan Haipeng Xu Dezhi Yang Nicholas X Fang Guoying Gu Xiangyang Zhu 《国家科学评论(英文版)》2021,8(10)
Advances in development of artificial muscles have enabled creation of soft robots with biological dexterity and self-adaption in unstructured environments; however, production of scalable artificial muscles with multiple-mode actuations remains elusive. Inspired by muscle-fiber arrays in muscular hydrostats, we present a class of versatile artificial muscles called MAIPAMs (muscle-fiber array inspired pneumatic artificial muscles), capable of multiple-mode actuations (such as parallel elongation-bending-spiraling actuations, 10 parallel bending actuations and cascaded elongation-bending-spiraling actuations). Our MAIPAMs consist of active 3D elastomer-balloon arrays reinforced by a passive elastomer membrane, achieved through a planar design and one-step rolling fabrication approach. We introduce prototypical designs for the MAIPAMs and demonstrate their muscle-mimic structures and versatility, as well as their scalable ability to integrate flexible but non-stretchable layers for contraction and twisting actuation modes and compliant electrodes for self-sensing. We further demonstrate that this class of artificial muscles shows potential for versatile robotic applications, such as carrying a camera for recording videos, gripping or manipulating objects, and climbing a pipe-line. 相似文献
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采用多入多出(MIMO)技术可以提高信道容量和信道可靠性,降低误码率.正交频分复用(OFDM)是一种特殊的多载波传输方案,各子载波在整个符号周期上正交,各子载波信号子频谱可以互相重叠,提高频带利用率.MIMO-OFDM技术是OFDM与MIMO技术结合形成的一种新技术,该技术是在OFDM传输系统中采用阵列天线实现空间分集,提高了信号质量.本文全面介绍了MIMO技术和OFDM技术及两者的结合,分析实现MIMO-OFDM技术的框架. 相似文献
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Manipulation of magnetic beads plays an increasingly important role in molecular diagnostics. Magnetophoresis is a promising technique for selective transportation of magnetic beads in lab-on-a-chip systems. We investigate periodic arrays of exchange-biased permalloy microstripes fabricated using a single lithography step. Magnetic beads can be continuously moved across such arrays by combining the spatially periodic magnetic field from microstripes with a rotating external magnetic field. By measuring and modeling the magnetophoresis properties of thirteen different stripe designs, we study the effect of the stripe geometry on the magnetophoretic transport properties of the magnetic microbeads between the stripes. We show that a symmetric geometry with equal width of and spacing between the microstripes facilitates faster transportation and that the optimal period of the periodic stripe array is approximately three times the height of the bead center over the microstripes. 相似文献
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通过正交实验的方法研究了进料流量、进料温度、塔釜温度的控制对酸水回收率的影响，从而优化了工艺条件，减少了溶媒消耗，降低了青霉素的生产成本。 相似文献
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多入多出(MIMO)系统在发射端和接收端分别设置多副天线,采用MIMO技术可以提高信道容量和信道可靠性,降低误码率。正交频分复用(OFDM)是一种特殊的多载波传输方案,各子载波在整个符号周期上正交,各子载波信号子频谱可以互相重叠,提高了频带利用率。MIMO-OFDM技术是OFDM与MIMO技术结合形成的一种新技术,该技术是在OFDM传输系统中采用阵列天线实现空间分集,提高了信号质量。本文中全面介绍了MIMO技术和OFDM技术及两者的结合,分析了实现MIMO-OFDM技术的框架,未来的工作是如何用硬件来仿真实现这个系统。 相似文献
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The notion of dominant designs refers to dominance in the market, hence the literature on dominant designs ignores the selection process that already takes place in pre-market R&D stages of technological innovation. In this paper we address the question to what extent pre-market selection takes place within an industry and how this may lead to dominance of one design over others before the market comes into play. Furthermore we study what selection criteria apply in the absence of actual market criteria. We do so through a historical analysis of design paths for hydrogen passenger cars.We argue that prototypes are used by firms in their internal search process towards new designs and at the same time as means of communicating technological expectations to competitors and outsiders. In both senses, prototypes can be taken as indicators of design paths in the ongoing search process of an industry.We analyzed the designs of prototypes of hydrogen passenger cars from the 1970s till 2008. A database is compiled of 224 prototypes of hydrogen passenger cars, listing the car's manufacturer, year of construction, hydrogen conversion technology, fuel cell type, and capacity of its hydrogen storage system. The analysis shows to what extent one design gained dominance and which strategies were adopted by the firms in their search processes.We conclude that indeed a dominant prototyping design has emerged: the fuel cell combined with high pressure gaseous storage. Actual and expected performance acted as selection criterion, but so did regulation and strategic behaviour of the firms. Especially imitation dynamics, with industry leaders and followers, is a major explanatory factor. Our main theoretical claim is that the selection of a dominant prototyping design is based on an interaction of sets of expectations about future performance of technological components and regulatory pressure that results in herding behaviour of the firms. 相似文献
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路晶鑫 《科技成果管理与研究》2010,(8):55-57
本文利用正交设计思想和数值模拟技术对影响水平井挖潜曲流河点坝砂体剩余油的影响因素做了研究,指出夹层特征是影响挖潜效果的主要因素。对水平井挖潜点坝砂体剩余油的机理进行了详细分析,夹层相对重叠长度综合反映了侧积夹层的各个特征,其大小决定了底水的脊进程度,直接影响挖潜效果。优化射孔也可以改善底水脊进程度,提高开发效果。 相似文献