共查询到20条相似文献，搜索用时 578 毫秒
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正交设计和均匀设计在复合蔬菜汁发酵饮料配方优化中的应用 总被引：1，自引：1，他引：0
通过正交设计和均匀设计优化复合蔬菜汁发酵饮料配方试验的实例,比较了2种设计法试验的结果,得出均匀设计法更适合复合蔬菜汁发酵饮料配方的优化。 相似文献
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应用遗传算法基本原理,采用锦标赛选择、算术交叉、均匀交叉、均匀变异和非均匀变异算子,设计了一般非线性规划和整数规划问题的通用求解算法,应用Matlab6.0编制了相应的求解软件。实例测试结果表明,该算法可以应用于一般的非线性规划和整数规划问题。 相似文献
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研究了灰色理论及均匀设计在有机合成中的应用．灰色相关度分析用来考察影响合成产率的各种因素并发现主要因素和剔除次要因素．均匀设计用来对三因素七水平的合成实验进行安排，以较少的实验次数获得较多水平的实验信息．结果表明灰色理论和均匀设计作为新兴的合成计量学的有效方法和技术对考虑影响因素和优化合成实验条件是很有效的． 相似文献
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摆管式撒肥机的研究设计 总被引：2，自引：0，他引：2
针对现有施肥机械容易产生堵塞、架宅以及撒施不均匀等方面的不足,采用仿生学原理,模拟人手臂撒肥的动作特征设计了一种摆管式撒肥机,着重设计了由偏心盘和摆叉组成的摆动机构.又通过设计肥箱容积、箱壁倾角、肥箱下肥口计量器,实现了肥料撒施的通畅和均匀性,保证了施肥效果的稳定高效. 相似文献
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突破实物试验设计的领域,建立起软试验设计的概念和体系;利用均匀设计探讨了软试验设计在多因素敏感性分析的建模研究中的应用. 相似文献
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【目的】针对铣削加工中铣削切削参数的非线性优化,研究了铣削参数优化求解问题。【方法】以最大生产率为目标建立了铣削切削参数优化数学模型,将试验优化设计中均匀设计的思路引入优化过程,根据均匀设计原理,在优化模型的设计变量空间内均匀分布一系列点,然后将可行域内的上述系列布点作为优化计算的系列初始点,并运用MATLAB工具箱函数分别开始进行优化计算。【结果】提出了一种基于均匀设计变量的铣削用量优化方法,得到了优化模型的一系列局部最优点,比较所有局部最优点的最优值,即认为在一定程度上获得了该优化问题的全局最优解。实例计算表明,单工序切削时间减少了5.72s,表明该方法对铣削用量的优化是可行的。【结论】采用均匀布点的铣削用量优化求解方法可求取非线性多峰值函数的全局最优解。 相似文献
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阐述了用三次均匀Ｂ样条曲线和双三次均匀Ｂ样条曲面进行计算机辅助几何设计的原理和方法。为解决三次均匀Ｂ样条曲线通过已知点列的首、末两点以双三次均匀Ｂ样条曲线面通过已知网格的最外层顶点问题，提出了三次均匀Ｂ样条曲线和双三次均匀Ｂ样条曲面边界控制的６种方法，并建立了相应的数学模型。 相似文献
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混凝土配合比是影响农村水泥混凝土路面强度的主要因素。针对吉林省东南部地区农村水泥混凝土路面强度较低的问题,采用均匀设计法,对混凝土的水泥用量、粉煤灰掺量、水胶比和砂率4因素进行分析,用均匀设计软件计算出最佳混凝土配合比,经验证试验证明,用均匀设计法分析得出的结论是正确的,在实际施工中也表现出很好的效果,可以在施工中采用。 相似文献
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廊坊市城镇居民体育消费心理调查与分析 总被引：3，自引：0，他引：3
如何针对廊坊市居民高度群居的特点,引导廊坊市居民的体育消费,推动新经济形式下社区体育产业的发展,是社区体育一个重要的研究课题．本文从运动心理学的角度,调查分析了廊坊市有代表性的不同地域居民的体育消费状况,提出了一些完善居民小区体育消费服务的建议,旨在为研究开拓社区体育市场提供一些参考数据． 相似文献
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With ass7istance of chromosome C-banding and genomic in situ hybridization(GISH)combined with meiotic analysis,five germplasms with homozygous wheat-Th. Bessarabicum chromosome translocations were developed and identified among BC1F5 progenies of the cross between T. Aestivum cv. Chinese Spring and Chinese Spring-Th. Bessarabicum amphiploid. These lines included Tj01 and Tj02(2n=44)containing a pair of wheat-Th. Bessarabicum translocation chromosomes besides a pair of added Th. Bessarabicum chromosomes,Tj03(2n=44)with a pair of added interspecific translocation chromosomes,Tj04(2n=44)containing a pair of interspecific translocation chromosomes besides an added pair of Th. Bessarabicum chromosome arms and Tj05(2n=46)containing a pair of interspecific translocation chromosomes besides two pairs of added intact alien chromosomes. The breakpoints of all the translocations were found to be not around centromere. Meanwhile,all the lines showed normal plant growth,development and fertility,while the translocation chromosomes transmitted regularly. The obtained translocations might be of use for transferring elite genes from Th. Bessarabicum into wheat. 相似文献
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枯萎病菌的PCR-RFLP分子检测和早期诊断 总被引：3，自引：0，他引：3
采用自行设计的、能对镰刀菌18srDNA进行特异性扩增的1对引物,利用PCR-RFLP对尖孢镰刀菌以不同方式侵染的植株进行跟踪检测。结果表明,应用PCR-RFLP检测程序可检测出处于侵染初期和潜育期的枯萎病菌,说明PCR-RFLP能够快速、灵敏、准确地对枯萎病进行早期诊断。 相似文献
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大孢指疫霉三个新变种的研究 总被引：1，自引：0，他引：1
本文报道大孢指疫霉Sclerophthora macrospora可区分为3个变种,即大孢指疫霉水稻变种S.macrospora var.oryzae var.nov.,大孢指疫霉小麦变种S.macrospora var.triticina var.nov.和大孢指疫霉玉蜀黍变种S.macrospora var.maydis var.nov.,新变种有汉文和拉丁文描述及形态图,地理分布。 相似文献
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The effects of oral insulin on intestinal tissue growth and brush border enzyme activities in newborn pigs were examined in this study. Newborn unsuckled pigs were bottle-fed for3 days with artificial milk(M),milk supplemented with 60mIUmL-1 of insulin(IH)or hydrolyzed milk(HM). Compared with newborn unsuckled pigs,piglets bottle-fed for 3 days all gained in intestinal weight and length significantly despite a mild loss in body weight during the experimental period. The activities of lactase and alkaline phosphatase(AKP)in the small intestinal mucosa declined markedly in pigs fed with M,but the activity of maltase increased significantly during the experimental period. Dietary protein pre-hydrolysis had no significant effect on intestinal tissue mass or length,but it moderated the decline of intestinal lactase and AKP activities. Dietary supplementation of insulin significantly increased mucosal protein content and brush border activities of lactase,maltase,AKP and aminopeptidase(AP)in the small intestine.The effect. of insulin treatment was particularly obvious at the distal region of the small intestine. These results demonstrate that oral insulin can stimulate intestinal digestive enzyme activities in newborn pigs. The finding supports the hypothesis that milk-borne insulin plays a role in regulating postnatal gut development in the suckling young. 相似文献
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根据现有资料和标本，新疆忍冬属（Ｌｏｎｉｃｅｒａ）共有２０种（包括引入栽培种），其中有３个新纪录种；（１）奥尔忍冬Ｌ．ｏｌｇａｅＲｇｌ．ｅｔＳｃｈｍａｌｈ．；（２）杈枝忍冬（赛小叶忍冬）Ｌ．ｓｉｍｕｌａｔｒｉｘ Ｐｏｊａｒｋ．；（３）伊犁忍冬Ｌ．ｉｌｉｅｎｓｉｓ Ｐｏｊａｒｋ．和１个新变种：细叶忍冬Ｌ．ｓｔｅｎａｎｔｈａｖａｒ．ａｎｇｕｓｔｉｆｏｌｉａ Ｃ．Ｙ．ＹａｎｇｅｔＪ．Ｈ．Ｆａｎ及１新种：圆叶忍冬Ｌ．ｓｕｂｒｏｔｕｎｄａｔａＣ．Ｙ．ＹａｎｇｅｔＪ．Ｈ．Ｆａｎｓｐ．ｎ．等，都是《中国植物志》７２卷没有记载过的，现在此发表。 相似文献
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Response surface(RSM)methodology based on a three-level three-factor Box-Behnken design of experiment was used to optimize the exopolysaccharide content(EPC)and the mycelium biomass in submerged cultivation by Clitocybe sp. AS 5.112. The critical factors selected for the investigation were cultivation temperature,time and volume of medium,based on the results of previous Plackett-Burman design. By analyzing the response surface plots,the optimum ranges of cultivation temperature,time and medium volume for obtaining over 1 253.00μgmL-1 of EPC lie in 24.3-25.8℃,9.7- 10.2d and 76.0-90.0 mL,respectively. While for obtaining over 8.32 mg mL-1 of dry cell weight(DCW),the above variables would be in the range of 23.8- 24.8℃,9.6- 10.3 d and 71.0 - 98.0mL,respectively. By solving the inverse matrix from the quadratic regression equations,the optimal conditions to gain 1 265.45μgmL-1 of EPC were 25.0℃,9.9d and 83.4mL,to gain8.50mg mL-1 of DCW were 24.4℃,9.9d and 87.1mL. In order to obtain the maximum yield of EPC and DCW at the same time,the above conditions would be 24.5℃,9.9d and 84.7mL,respectively,in this situation,the maximum predicted EPC and DCW were 1 261.60μgmL-1and 8.47 mg mL-1,respectively.. The experimental data under various conditions have validated the theoretical values. 相似文献
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The photosynthetic characteristics of strawberry(Fragaria x ananassa Duch. cv. Toyonoka)leaves under illumination of identical light intensity(55-57% natural light)with different light quality were studied. It was showed that the chlorophyll content,maximal photochemical efficiency of PS Ⅱ(Fv/Fm),Fm/Fo,amount of inactive PS Ⅱ reaction centers(Fi-Fo)and rate of QAreduction were positively correlated with the red-light/blue-light ratios,but the chlorophyll(a/b)ratios were negatively correlated with them. Carotenoid content of the leaves was maximum under the blue film,than under green film,red film,white film and yellow film,and negatively correlated with the red/farred ratios. The apparent quantum yield(AQY),photorespiratory rate(Pr)and carboxylation efficiency(CE)were also strongly affected by light quality. The photosynthetic rate(Pn)in strawberry leaves under green film was significantly lower than under all other film. Our results suggested that light quality is an essential factor regulating the development of PS Ⅱ and phytochrome and an independent blue light photoreceptor,possibly a cryptochrome,can regulate photosynthetic performance. 相似文献