查询词典 concentration

The research shows that gas concentration shows generally an increasing tendency along the working face airflow direction, from 0.095% to 0.18%, under the effect of gas drainage points, up-and-down changing locally; gas distribution in a transect of working face is unequal, under the effect of gas emission, ventilation and drainage, the gas concentration near coal wall is larger than that near goaf, which is a concave function distribution within a distance of 1876.5 m from the inlet of working face, after greater than 76.5m, which is a decreasing distribution from coal wall to goaf.

研究表明，该工作面瓦斯体积分数沿风流方向总体呈逐渐增加趋势，介于0.095%~0.18%之间，受瓦斯抽放点的影响，局部有起伏变化；工作面横断面瓦斯体积分数分布不均匀，受瓦斯涌出、通风和抽放的影响，靠近煤壁侧瓦斯体积分数要高于采空区侧，在距离进风口约18~76.5 m范围内为凹函数分布，大于76.5 m之后，从煤壁至采空区为单调下降函数分布。

Therefore, corresponding to the concentration of urban population and the large number of urban congestion and concentration of housing.

因此，相应的浓度城市人口和大量的城市拥挤和浓度的住房。

The most suitable range of temperature is 25~30℃ and lethal temperature is 56℃ for hypha growth, the most suitable temperature is 25℃ for produce more conidiospore and lethal temperature is 56℃ for conidiospore. Within the pH range of 3~11 the hypha could grow and produce conidiospore. The optimum pH is 5~7 for hypha growth and 3, 9, 10 for produce more conidiospore. The range of glucose concentration is 2%~8% for hypha growth, the most suitable glucose concentration is 2% for hypha growth and produce more conidiospore. The effect of illumination on Bipolaris cynodontis was significance to the growth hypha and spore numbers. The whole light is advantage of hypha growth, but could not produce conidiospore. Alternation of light and darkness for 12 hours is advantage of hypha growth, as well as produce conidiospore.

菌丝最佳生长温度是25~30℃之间，在25℃时最利于产孢，菌丝生长和分生孢子的致死温度是56℃；该菌在pH 3~11范围内均能生长，产生分生孢子，菌丝生长的最适pH 5~7，产孢量最大的pH是3，9，10；糖浓度在2%~8%菌丝能生长，在糖浓度为2%时菌丝生长最好，产孢量最高；光照对病原菌的菌丝生长和产孢有明显影响，在全光照的条件下有利于菌丝的生长，但不会产孢，黑暗12h光照12h既利于菌丝生长又利于产孢，而全黑暗的条件下不利于菌丝生长和产孢。

The factors which should be considered in BP training are found and program is compiled by C++ Builder. Good agreements are obtained by training 30 runs of lower concentration, middle concentration and hyproconcentration flow. The conjunctional functions are memoried and used to pr...

找出了进行BP神经网络训练时应考虑的水沙要素，采用C ++Builder语言编制的程序，对 3 0组高、中、低含沙量的水槽试验资料进行训练，发现训练值与实测值符合较好，说明得到的连接权能反映实际情况；用该连接权对 4组试验数据进行了预测，预测结果与实测值相差较小，表明用BP神经网络方法确定挟沙能力的可行性。

The results showed that serum copper concentration and coper/zinc ratio in patients increased while serum zinc and selenium concentration decreased.

结果表明，恶性淋巴瘤患者血清铜、铜/锌比值升高，而血清锌及硒水平降低。

ConclusionSerum concentration of NO and plasma concentration of ET1 and the balance relationship between them corporately affect the formation and the extent of PH of congenital heart disease.

结论血清NO浓度和血浆ET1浓度及其之间的平衡关系共同影响PH的形成及其程度。

Methods Exerting backwards force on rats mandible and measuring concentration of rats' blood cAMP in three groups with radio-immunity. Drawing the time-concentration curve and making cosine analysis.

给大鼠下颌戴向后上牵引的矫形器，用放射免疫法测定不同加力组大鼠血中环磷腺苷含量，绘制时间-浓度曲线，并进行时间生物学的余弦统计分析。

Through the analysis of the local strain concentration or stress concentration, together with the forming ability model, the occurrence and location of the crake can be predicted.

通过分析局部的应变集中或应力集中再加上金属变型能力模型，裂纹的发生和地点可以预见。

It was shown that upon addition of sodium dodecyl sulfate to solutions of crystal violet in the same concentration, making a series of solutions with graduation of concentration of SDS, a gradual decrease in absorbance at the abs.

于浓度相同的结晶紫溶液中，加入不同浓度的十二烷基硫酸钠组成一系列含有相同浓度CV和不同浓度SDS的混合溶液。

Furthermore, this paper explored a new feasible process of cyanide recovery,investigated the effect of time, concentration of H2SO4 and temperature on the elution of cyanide and zinc in the process of first stage elution, and discussed the effect of time,concentration of ammonia water, temperature and ultrasonic on the elution of copper in the second stage elution.

另外，本实验探索出一种可行的回收氰化物新工艺，在硫酸解吸过程中，研究了硫酸解吸的时间、浓度和温度因素对氰和锌的解吸率的影响；在氨水解吸实验中探讨了时间、温度、浓度、超声波等因素对铜解吸率的影响。

So it was last week in Selma , alabama.

上星期在亚拉巴马州塞尔马市发生的事件也是这样一个转折点。

The group also spearheads various social programs in China.

该组织还带头参与中国的各种社会活动。