查询词典 optimum value

But the back propagation algorithm often gets into the minimum value and its constringent speed is slow. Aim at the gases, we design a optimum back propagation algorithm.

传统的前馈神经网络多采用误差反传学习算法对网络进行训练，但是误差反传学习算法具有容易陷入局部极小值，收敛速度慢以及容易导致震荡等缺点。

The results showed that the highest yield of GLP among six strains was ShuShe.The effects of carbon source, nitrogen source, salt and the optimum initial pH value of medium on GLP produced by ShuShe were studied in liquid and solid fermentation respectively. The liquid and solid fermentive medium of high yield was selected by orthogonal experiment.

分别对液态发酵和固态发酵两种发酵方式的碳源、氮源、盐、培养基的起始pH 等对该菌株灵芝多糖生物合成的影响进行了研究，通过正交试验确定了高产灵芝多糖的液态发酵培养基和固态发酵培养基，液态发酵培养基的组成为：麦芽糖，3%；蛋白胨，0.4%；KH2PO4，0.15%；MgSO4，0.05%；培养基起始pH 为6。

Through the analysis of range and variance of Cu and Cd removal efficiency, the optimum experiment conditions were hexadecyl trimethyl ammonium chloride used as cathode purging solution, the pH value 4～6, and the voltage 20 V.

通过对正交试验结果进行极差和方差分析，试验的最佳条件为：电压为20 V，阴极液加入十六烷基三甲基氯化铵并控制pH值为4～6。

Firstly, polyacrylamide with 26 million molecular weight was compounded in lab through establishing optimum compounding initiator proportionality of 1:1. 3 and mass concentration of 170 mgL^(-1), temperature of 10 ℃, acrylamide mass percentage of 25%, electrical conductivity of 3.6 μSm^(-1) and pH value of 6.57. The salt-resistance, thermal endurance and shear-resistance of polyacrylamide could be enhanced b introducing sulfonic acid group or styrene sulfonate group or drawing the two groups above at the same time. Secondly, chelator HEDP, bactericide isoquinoline ketone and oxygen scavenger thiourea were optimized to improve the compatibility of polyacrylamide and formation water.

在由室内试验确定了复合引发剂最佳比值1：1.3和质量浓度170 mgL^(-1)、合成最佳温度10℃、丙烯酰胺单体质量分数25%、电导率3.6μSm^(-1)和pH值6.57后，合成出相对分子质量高于2.6×10^7的聚丙烯酰胺，同时通过丙烯酰胺单体复配引入磺酸基团、苯乙烯磺酸基团或同时引入此两种基团，提高了聚合物的抗盐、抗温、抗剪切性能；后针对聚丙烯酰胺与地层水配伍性差的问题，优选出HEDP螯合剂、异噻唑烷酮杀菌剂和除氧剂硫脲，对聚合物稳定效果明显。

Effect of de-astringent and crispness-keeping on Mopan persimmon of vacuum packing ;2. The paper introduces the method for preserving the fresh rare birds eggs using ozone sterilization and vacuum packing ,and describes the optimum technological process and parameters after a comprehensive analysis and study of the egg's weight-reduced rate,egg white index,and yolk index and it's pH value,i.

采用臭氧杀菌真空包装的方法进行乌鸡蛋的保鲜，综合鸡蛋减重率、蛋白指数、蛋黄指数和蛋黄pH值四项指数进行分析和研究，确定采用此工艺的最佳工艺流程和参数：过氧乙酸溶液预杀菌浓度为0 5%，臭氧杀菌3min，选用Ny/PE复合袋在真空度600mmHg下进行真空包装，保鲜期为7个月，好蛋率95%以上。

The product synthesized under the optimum conditions as follows had final acid value of 0.494 mgKOH/g,and conversion of reatants up to 99.59%,molar ratio of isooctanol to phthalic anhydride 3∶1,the dosage of both aluminium oxide and stannous octoate as catalyst 0.2%(based on the total mass of reactants),reaction time 2.5 hours.

考察了工艺条件对合成DOP的影响，结果表明，在异辛醇与苯酐摩尔比3∶1，氧化铝/辛酸亚锡复配催化剂用量分别占反应物总量的0.2%，反应温度230℃，反应时间2.5h的最佳工艺条件下，产品终点酸值0.494mgKOH/g，反应物转化率达99.59%。

The making condition for releasing cholesterol from the inclusion compound was found based on the single factor experiments. The experiments demonstrated that the releasing rate of cholesterol was reached to more than 97% in the optimum condition including pH value 9.5,regurgitant time hour,concentration of edible ethanol 96% and regurgitant temperature 80C.

利用单因素实验确定山包合物释放胆固醇的优化工艺条件：pH值为9.5，回流时间为1h，乙醇浓度为96％，回流温度为80℃，此时胆固醇的释放率达到97％以上。

To broaden desert shrub new utilizing fields, accelerate desert shrub developing to the direction of high added-value and high benefit, the paper studied on the liquefaction of Salix, Caragana and Poplar in the presence of Phenol under sulfuric acid catalysis. The optimum processing parameters for Salix, Caragana and Poplar liquefaction and resinification were investigated. The effect of molar ratio of formaldehyde to liquefied products and NaOH to liquefied products on the character and glue strength of liquefied products resin was studied.

摘 要：为了开辟沙生灌木资源新的应用领域，促使沙生灌木资源的利用向高附加值、高效益的方向发展，本文以苯酚作液化剂，以稀硫酸作催化剂对沙柳、柠条和杨木进行液化实验，分析了反应温度、液比、催化剂用量及液化时间对液化反应的影响；并研究了沙柳、柠条和杨木液化产物树脂化合成工艺和配方，分析了不同的甲醛与液化产物摩尔比以及氢氧化钠与液化产物摩尔比对沙柳、柠条和杨木液化产物树脂的各项性能的影响。

With routine method, from having elected contents higher one RNA bacterial strain among several saccharomycetes, beer yeast, and the method with Shan factor experiment have studied an experiment being bacterial strain's turn to produce more proper RNA culture medium made up of , optimum the pH value fermenting and the best fermentation time.

本实验用常规方法从数株酵母菌中选出了一株RNA含量较高的菌株——啤酒酵母，并用单因素实验的方法研究了该菌株产RNA较适宜的培养基组成、最佳发酵pH值和最佳发酵时间。

Results The results showed that the optimum carban and nitrogen resource were sucrose and lopassium niruate. The growth rates of mycelia were fastest at the temperature of 30 ℃ and pH value 6. Darkness was benefitial to hyphal growth, but light was benefitial to sclerotial formation.

结果］结果表明，白绢病菌菌丝生长最适温度为30℃，最适pH值为6，最适合的碳源、氮源为蔗糖和硝酸钾；黑暗条件有利于菌丝的生长，而光照条件有利于菌核的产生。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。