查询词典 root-mean-square value

As long as the root of the characteristic equation is within the unit circle of z-plane and the corresponding PID parameter is got, the closed loop control system is sure to be stable. Although the root of the characteristic equation can vary within the unit circle of z-plane,different value may affect the control property differently.

本文所采用的这种确定PID参数的方法，虽然可以使特征方程的根在z平面的单位圆内任意取值，但各种取值情况对变风量空调系统的控制品质的影响却不同，因此，要对各种特征方程的根的取值情况进行寻优，本文采用遗传算法对特征方程的根进行寻优，从而使控制器的参数得以优化。

Understanding of the various and gender-different morphology of the roots and complex root canals of maxillary first premolars, is of great value for the diagnosis and root canal therapy.

上颌第一前磨牙牙根形态多样并有显著性别差异，而且根管形态类型复杂。充分了解其解剖形态，对临床治疗具有重要意义。

Molecule frame of paraffin ; bond abutting of value; abutting matrix latent root （X_（1cc）; X_（2cc））; dist-integral root of connect index; paraffin ; bond dissociation energy; molecular topology indices ; spatial steric hindrance parameter

分子图；子图；键邻接值；邻接矩阵特征根（X_（1cc）； X_（2cc））；距离积方根连接性指数（X_（1-j））；链烷烃；键离解能；空间位阻参数

By means of the numerical methods, the root of the resonance frequency equation is solved, and by means of Ansys software and the finite element method, the torsional vibration mode of the thin ring is analyzed, and the academic value and the simulant value of the resonance frequency are compared.

利用数值方法，求出了共振频率的理论值；并利用Ansys软件，对薄圆环振子进行了有限元模拟，得到了其共振频率的模拟值。

The energy value of different ages in root and stolon were studied, the results indicated energy values of root correlated with ages.

同时对不同龄级的匍匐茎和根进行了测定，结果表明，根的能值与年龄具有显著回归相关关系。

Applying AMMI model to analyse the root production, sugar production and sugar stability of six sugar beet varieties, and these three value and the corresponding value of the species stability parameters as an indicator, the tested varieties are evaluation.

应用AMMI模型对6个甜菜品种的块根产量、含糖率和产量糖进行稳定性分析，并以这3个性状的表型值和相应的品种稳定性参数为指标，综合评价供试品种。

The gingko whole body is valuable, is honored as "the money tree", the fruit, the clothes, the leaf, the root, the material have the high development use value; Plans Jiangsu Province baiera forest park which constructs is the nature is unique, also not artificial restoration's possibility, the project has the potential economical value and gingko resources conservation urgent.

银杏浑身是宝，被誉为&摇钱树&，果、衣、叶、根、材都具有较高的开发利用价值；拟建的江苏省古银杏森林公园是自然界独一无二，也无人工再造的可能，项目具有可开发的经济价值性和银杏资源保护的急迫性。

Result The average relative error of NIRS model of indigotin and indirubin content were 4.14%and 4.72%.The predicted value nearly was equal to HPLC value. The NIRS model had good predictability to analyze compound indigowoad root granule quality.

结果］复方板蓝根颗粒中靛蓝和靛玉红2项指标人工神经网络模型预测值的平均相对误差分别为4.14%和4.72%，与高效液相色谱法测定值的符合程度很高，该模型具有很好的预测能力。

From the point of view of structure,bamboo cell wall ratio,amount of bundle per unit area,fraction of bundle sheath,fraction of vessel increase from the root to the top of the bamboo,while fractionof parenchyma.Single bundle sheath area decreases with the increase of height.Fiber length,fiber width and vessel length increase from the root to the top andget theirs maximum value at the length of 17th node to 23rd node and thendecrease.Fiber length and width ratio slightly decreases while vessel widthincreases with the increase of height.

从构造角度来说，竹材胞壁率、单位面积维管束个数、纤维束比量、输导组织比量从基部到到梢部随着高度增加而增加，而薄壁组织比量、单个维管束纤维束面积随着高度增加而减小；纤维长度、纤维宽度、导管长度从基部到梢部随着高度的增加而增加，在第17竹节到第23竹节达到最大值，而后下降，纤维长宽比随着高度的增加而缓慢下降，导管宽度随着高度增加而一直增加。

In macroscopic, the sudden and rapid rise of rural juvenile delinquency rate in social transition has profound social root and intrinsic mechanism. The social polarization caused by city - countryside - dual society structure is the social root of rural juvenile delinquency, and the existence of each kind of social exclusion is the intrinsic mechanism; In medium reasons, the rural juvenile delinquency is the result of family, school, companion community, mass media as well as other bad affection factors; In microscopic, the rural juvenile delinquency is inseparably related to rural juveniles low degree of schooling, the lack of legal consciousness, the desalination of morality and the lost of value orientation and so on.

从宏观上，社会转型期农村未成年人犯罪率的急剧上升、迅猛增长有着深刻的社会根源和内在机理，由社会发展失衡和城乡二元社会结构所导致的社会极化是农村未成年人犯罪的社会根源，各种社会排斥的存在是农村未成年人犯罪的内在机理；从中观上，农村未成年人犯罪是家庭、学校、同伴群体和大众传媒等社会化机构的不良影响所致；从微观上，农村未成年人自身文化程度的低下、法律意识的淡薄、道德观念的淡化和价值取向的迷失等与其犯罪也有着密不可分的联系。

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。

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。