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In order to reduce error of experimental data treatment, to strengthen accuracy of the result in conductivity determination of the dissociation constant of acetic acid, and also to further synthesis of experiment for training students' ability to treat data and to graph with computer, both Excel and calculator with statistical function have been utilized to perform a linear regression analysis of temperature-limiting molal conductivity of acetic acid solution.
为了减少实验数据处理的误差,提高结果的准确性;也为了进一步加强实验的综合性,培养和提高学生应用计算机处理实验数据和作图的能力,本文在电导法测定醋酸解离常数的实验中分别采用Excel电子表格和具有统计功能的计算器对醋酸溶液的温度和极限摩尔电导率数据进行线性回归分析,得到一元线性回归方程和相关系数,进而确定实验温度下醋酸溶液的极限摩尔电导率。
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The results of experiment show the optimal extraction condition of Gardenia Yellow: refluxing and extracting three times with 50 percent ethanol in 55℃, water-bath and extracting 4 to 5 hours, Gardenia Yellow extract solution is separated by X-5 absorption resin, and then with 30 percent ethanol, getting Geniposide white crystal, the determining purity by HPLC come to 99.1% and can be used as standard, the part doffing by 70% ethanol can be concentrated to get more pure Gardenia Yellow pigment.
实验证明了栀子黄的最佳提取条件:50%的乙醇回流提取3次,55℃水浴加热,提取时间为4-5个小时。栀子黄提取液经X-5大孔吸附树脂分离,用30%乙醇溶液洗脱,纯化得到栀子苷白色晶体,HPLC检测纯度达99.1%,可做标准品使用。70%乙醇洗脱部分浓缩可得栀子黄产品,精制后产品纯度有显著提高。
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As an experiment of basic course in electronic technology,the project is based on domination principle of digital music player and integrates with the elementary application of multiplexer,flip-flop,counter and ROM,which enables students to comprehend these knowledge fully along with acquaintance of technical application and promotes systematic understanding of basic notions,course content and advances the transformation from knowledge to ability.
实验教学是学生综合素质和实践能力培养的重要环节。实验教学内容应该与科研、工程、社会应用实践密切联系,形成良性互动[1]。超大规模可编程逻辑器件的应用是目前电子技术发展的一个新领域,它依赖于计算机技术的辅助实现数字系统的设计和仿真,不需连线即可实现资源庞大的片上系统[2]。
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The experiment proved that ECH can crosslinked with-NH〓 in low temperature and with-OH under higher than 40℃.
研究结果表明,在低温下只有壳聚糖的氨基参与交联反应;当反应温度高于40℃时,羟基才发生反应。
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By experiment it was found that the production of oxygen of Elodea nuttallii's telome through photosynthesis had curved correlation with the temperature and illumination, while negative linear correlation with pH.
本文研究了温度、pH值、光照三种环境因子对伊乐藻光合作用的影响,实验得出伊乐藻顶枝光合作用的产氧量与温度、光照呈曲线相关,与pH值呈线性负相关。
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He outlines how the Higgs field, which is thought to be responsible for endowing matter with mass and thus enabling gravity to act on it, may also be a collective property. Physicists are engaged in the biggest scientific experiment in the history of the world at CERN, the European particle physics laboratory, in an attempt to find the particles associated with this field and thereby confirm its existence.
他认为希格斯场(人们认为希格斯场赋予了物质以质量,从而万有引力可以作用于物质之间)可能也有其它物质相伴,并对验证过程进行了简要描述;物理学家正在CERN的欧洲粒子物理试验室里进行史上最大规模的实验,为的是找到和希格斯场关联的粒子,从而确定希格斯场的存在。
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The new assembled digital Doppler rader was introduced in this paper. The results of comparison experiment show that the speed and direction of wind detected by the new rader conicide with those by tethersonde, and its functions are equivalent to those of Doppler acoustic radar with separated antenna developed previously in China and other countries.
本文对新设计的集合式数字多普勒声雷达作了介绍,对比试验结果说明新设计的声雷达测量风速和风向的结果与系留气艇测量结果相符很好,其性能与过去国内和国外分离式天线多普勒声雷达的性能相当。
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At last through modeling the system with GSPN model,the experiment,which compared the estimative value with the experimental values,proves that the new structure of VPN system has the same outstanding performance.
最后对改进的系统建立了GSPN模型进行性能分析,通过与实际测试结果的比较,可以看出改进的系统同样具备优秀的性能。
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To avoid the inconvenience of collecting blood sample and the big error with the scatter-dot graph method, this paper tries to apply mathematics model to the athletics realm, examinate the mathematics model with the data from the experiment and further analyze T's dynamic regularity in sanda rivalry.
为了避免血睾酮采血的不方便性和传统描点法误差大的缺陷,本课题尝试将数学模型的研究方法引入到体育领域中,并用实验所测数据对该数学模型进行检验。
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The characteristic and difference of flow in porous media between the pseudo-plastic fluids and the expansile fluids was described in detail. The experimental pressure drop measurements were made in a packed bed under a variety of conditions, and the variation of the friction factor with the Reynolds number was obtained. Corresponding to the flow resistance in a nonporous channel, the flow resistance in porous media can be divided into Darcy resistance and Forchheimer resistance as well. The experiment data was divided into Darcy regime, transitional regime and Forchheimer regime in accordance with the Reynolds number.
实验测定了不同浓度聚丙烯酰胺溶液在五组填充多孔介质中流动的压降-流量关系,绘出了阻力因子随Reynolds数变化的关系曲线;按照将流动阻力分为层流粘性阻力和惯性阻力的观点,将多孔介质流动阻力分为Darcy阻力和Forchheimer流动阻力;参考有关文献,将实验区域按Reynolds数范围分为Darcy流动、过渡流动和Forchheimer流动。
- 推荐网络例句
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According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.
曝气设备的动力效率在叶轮转速为120rpm~150rpm时取得最大值,此时氧利用率和充氧能力也具有较高值。
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The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.
稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世,形体几无变化。
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When I was in school, the rabbi explained everythingin the Bible two different ways.
当我上学的时候,老师解释《圣经》用两种不同的方法。