根据实验的
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In the one half part, according to the strontium nature, thermodynamic calculation of correlative reaction and the principle of the vacuum aluminothermy reduction process, with the laboratory findings of preparation strontium by vacuum aluminothermy reduction compared and analyzed in different parameter conditions, a variety of factors which effect the decomposition rate of SrCO_3 and the percent reduction of strontia are gotten out. The factors include that the decomposition rate of SrCO_3 is influenced by different addition and pressure. They also include that the percent reduction of strontia is influenced by excess coefficient of reducing agent aluminium powder, the particle size of raw material or reducing agent, the pressure of barbecuing, temperature and reduction time. According to those, we can draw the conclusion as follows:(1) Decomposition temperature of SrCO_3 is decreased by adding carbon and alumina in different degree.(2) With quantitative carbon added under the vacuum condition, the decomposition temperature of SrCO_3 is decreased obviously, which can fall 150℃ compared with atmospheric pressure.(3) In keeping 1150℃ of 2.5h, under the 5Pa vacuum condition, the decomposition rate of SrCO_3 nearly keeps in 99% steadily.
在前半部分的真空铝热还原法中,根据锶的性质、相关反应的热力学计算及真空铝热还原法原理,通过对不同参数条件下的真空铝热还原法生产金属锶的实验结果的分析比较,得出了影响SrCO_3的分解率和氧化锶的还原率的种种因素,具体因素包括不同添加剂、不同气压对SrCO_3分解率的影响,还原剂铝粉的过量系数、原料与还原剂的粒度、制团压力、温度和还原时间等对氧化锶还原率的影响,得出具体结论如下:(1)添加碳和Al_2O_3能不同程度的降低SrCO_3的分解温度;(2)真空条件下加入一定量的碳可显著降低SrCO_3的分解温度,比之常压下可降低150℃之多;(3)在1150℃恒温2.5h、真空度达到5Pa的条件下,SrCO_3的分解率几乎保持稳定在99%;(4)氧化锶的还原率随还原剂过量系数的增大而增大,但是趋势越来越小,当过量系数超过25%后,氧化锶的还原率几乎不再增加;(5)氧化锶的还原率随原料与还原剂的粒度的变细而增加;(6)氧化锶的还原率随制团压力的增加而增加,但超过一定值后,氧化锶的还原率反而会下降;(7)氧化锶的还原率随还原温度的升高而增加;(8)氧化锶的还原率随还原时间延长而增加,在本实验条件下,超过2.5h趋于稳定。
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Firstly, we establish the 3-D heat transfer model of the swine crura under the effect of indirect monkshood moxibustion, analyze the temperature distribution on the surface of the monkshood during the moxibustion in the experiment, then apply the boundary condition to the model with the air convection considered and calculate the temperature and heat flux distribution of the 3-D model at different times. Beside, we also compare the results of the 3-D model with the experiment and the results of the 2-D model to verify the correctness of the 3-D model.
本文先建立了艾炷隔附子饼灸作用于生物组织的三维传热模型,然后根据实验条件分析了艾炷燃烧过程中附子饼底面的温度分布情况,并在模型上施加了新建立的温度边界条件,同时考虑了生物模型表面的空气对流条件,计算得到了三维生物模型在不同时刻的温度分布图和热流量分布图,而且对三维模型的计算结果、实验以及二维模型的模拟数据进行了比较,验证了三维模型的准确性。
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The experimental results show that the mean particle size of griseofulvin precipitated by RESS is smaller than 1, 0μm, narrow distribution and 95% fine particles is smaller than 1. 0μm. Increase of the pre-expansion pressure, the extraction temperature, the expansion chamber temperature, the spraying distance, the concentration of cosolvent and decrease of the nozzle diameter resulted in decrease of the particle size under the operating condition studied. Enhancement of the pre-expansion temperature resulted in increase of the particles size. The SEM of GF shows that the shape of original is atactic and a wide size distribution, but the microparticles obtained by RESS is reverse. Similar melting points and XRD patterns were observed for the original material and the precipitates obtained by RESS.
实验结果表明,用含夹带剂的RESS法制备的灰黄霉素微粒的平均直径在1μm左右,且分布均匀,95%微粒在1μm以下,仅用CO〓作为超临界流体制备的微粒与上述方法制备的微粒的平均直径和分布相似,只是产量太低,而用机械法制备的微粒平均直径在3μm左右且分布较宽;不同的过程参数对沉析微粒尺寸有不同的影响,预膨胀压力、膨胀室温度、溶解温度以及夹带剂浓度的提高或增大,均可使沉析微粒的直径变小;预膨胀温度提高,所得微粒的直径变大;喷射距离的增加,沉析微粒的直径变小;喷嘴直径越小,由此制得的微粒的直径就越小;根据实验结果还可知道,通过理论计算的马赫盘处微粒的直径可以较好地估计出膨胀室中收集到的微粒的直径。
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E. , methine carbons were spit into the two components with inclusion of PVP to system. The above observation were responsible for the formation of intermolecular hydrogen bonding interactions. The proton spin-lattice relaxation time T〓, T〓 in the laboratory and the rotating frame were measure as a function of the blend composition. In view of the relaxation parameters, it is concluded that the Phenoxy and PVP chain are intimately mixed on the scale of 20-30A.
采用反转-回复法,我们测定该体系的T〓,T〓值的测定进一步支持,根据Tg判断的相容性。T〓ρ的研究结果表明,该体系在分子水平上是相容的,根据自旋扩散过程,估算该体系的相容性尺度为20-30〓,实验的1/T〓ρ组成关系同理论的线性关系比较呈负偏差,表明共混改变了组分在体系中的混合状态。
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Based on the newly proposed nomograph, patients both with obstructed and unobstructed cases can be diagnosed accurately. Also, those patients with weak detrusor, where the bladder can not provide enough power to micturate regularly, can also be identified with this new nomograph, which again can not be diagnosed with the Abrams-Griffiths nomogram.
根据我们计算和实验的结果,我们得知在没有阻塞的尿道流场内,摩擦损失是影响压力损失最主要的因素;而在轻微阻塞的尿道流场内,磨差损失及阻塞段几何外型改变,面积改变的能量损失都影响很大;而在较为严重的阻塞情况下,阻塞段的外型,最小截面积等影响能量损失甚为巨大,另外我们根据计算的结果发展出一个无因次参数图,我们选用了Reynolds number和来做参数,结果发现这样不仅可以把阻塞和未阻塞的病例分清,甚至能判断逼尿肌无力等症状。
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Basing on my own experimental results and that of theSLA researcher (Takayuki Nakamori 2001), I come to this tentative conclusion: UGPrinciples are accessible to all L2 learners, no matter whether the principles are instantiatedin the L1 or not; with respect to the parameters, the parametric values instantiated in the L1are initially available; while the two languages differ in parameter settings, someparameters can be resettable but to some other parameters, such as the Spec-parameter that isassociated with functional categories, become difficult even closed to the resetting; otherwiseevery L2 learner can acquire the target language successfully as well as the native speakerdoes.
根据自己的实验结果及第二语言研究者(Takayuki Nakamori 2001)的实验结果得出了这样一个结论:普遍语法中的原则对所有的第二语言习得者来说仍然可及,不管这些原则是否体现在第一语言中;但在参数方面,体现在第一语言里的参数值在第二语言习得中是可以首先习得的,但当第一语言和第二语言的参数值不同时,某些参数可以重新设定而对某些参数例如与功能管辖范围相关的具体参数就很难甚至不能重新设定;否则每一个第二语言习得者都能像母语习得者习得母语那样成功地习得目标语。
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This paper described the principle of plane ultrasonic spreading abroad in the liquid coming into being ultrasonic grating,educed the density and refractive index changing rule basis continuity equation of not-ideal liquid and Lorentz-Lorenz law,expressing the transformation of the index and refractive index satisfaction similar equation of standing wave,and described the relation curve of the standing wave form at a few special times,liquid density and refractive index periodic variety according to the res...
描述了平面超声波在液体里传播形成超声光栅的原理;根据非理想流体对应的连续性方程和Lorentz-Lorenz定律,推导了液体光栅中液体密度与折射率的周期性变化规律,表明液体密度和折射率变化满足相似的驻波方程;根据推导的结果描绘了几个特殊时刻的驻波波形、液体密度、折射率周期性变化之间的关系曲线;进而由折射率周期性变化规律分析了超声驻波自身像的形成原理,并给出了CGS型超声光栅声速仪利用超声驻波自身像测量声速的方法与实验结果。
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According to the experimental results the reaction mechanism of gasification is proposed: firstly, the catalyst releases an oxygen atom from its rich-oxygen site to combine with a carbon atom and create a CO, then the CO molecule desorbs from the catalyst surface; next, the catalyst absorbs a CO2 molecule; and finally on the catalyst surface another CO molecule is created and the original rich-oxygen site gets an oxygen atom. On the basis of gasification process the material balance equations were built, which were solved by using numerrical integral methods and the reaction rate constants for four steps were obtained: they are 0.0703mol·g-1·min-1·kPa-1, 0.0959mol·g-1·min-1·kPa-1, 0.00539 mol·g-1·min-1 and 0.0321 mol·g-1·min-1·kPa-1 respectively.
根据实验结果推导得出了该反应过程是催化剂表面富氧活性部位先与煤焦反应生成一个CO分子,然后此CO分子从催化剂表面脱附,接着催化剂吸附气态的CO2生成一个CO并且夺得一个氧原子实现自身还原的过程,在此基础上建立了煤的催化气化的物料平衡方程组,对各步骤的反应速率常数进行了求解,在本文采用的实验条件下,各反应步骤的反应速率常数分别为0.0703 mol·g-1·min-1·kPa-1;0.0959 mol·g-1·min-1·kPa-1;0.00539 mol·g-1·min-1·kPa-1; 0.0321mol·g-1·min-1·kPa-1。
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3Based the trait of the vegetable gum drilling and completion fluid, used LV-CMC,FJ-03, polyglycol, JL-α and SMP-Ⅰas the filtration control agents which should be optimized. Finally this paper optimized LV-CMC and polyglycol as the filtration control agents. In order to form a tough impermeable cake, this paper used QS-2 as the inflexible filling material according to the mechanism of fluid loss control.
根据植物胶钻井液完井液的特点,确定LV-CMC、FJ-03、聚乙二醇、JL-α、SMP-Ⅰ为降滤失剂的优选对象,通过实验优选出LV-CMC、聚乙二醇为植物胶钻井液完井液体系的降滤失剂,并根据钻井液的降滤失机理,为使形成更加坚韧致密的泥饼,确定QS-2作为刚性填充粒子。
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A ccording to Wikipedia,"Scientists include theoreticians who mainly develop new models to explain existing data and experimentalists who mainly test models by making measurements-though in practice the division between these activities is not clear-cut, and many scientists perform both."
根据维基百科,&包括理论学家在内的科学家专注于开发新的模型以解释目前存在的数据,同时实验家主要专注于通过做实验的方式来测试模型--然而在实践中,对这两种行为的划分并不明显,并且很多科学家同时做了这两件事(译者注:开发新模型和测试模型)&。
- 推荐网络例句
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This one mode pays close attention to network credence foundation of the businessman very much.
这一模式非常关注商人的网络信用基础。
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Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.
扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。
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There is no differences of cell proliferation vitality between labeled and unlabeled NSCs.
双标记神经干细胞的增殖、分化活力与未标记神经干细胞相比无改变。