因素

They are natural factor and anthropic factor.

6南大港湿地植被外界影响因素分为自然因素和人为因素。

Neural tube was formed by the apophysis,bend and close of neural crest.

它们在病因学上是多因素的，是遗传学因素和环境因素共同作用结果。

The feasibility of neural network application to asphalt concrete pavement performance forecast is set forth. Three main environmental factors-traffic, rainfall, temperature, which can lead to the direct change of pavement performance are used as the input layer of neural network. The performance indexes of asphaltum concrete pavement, i.e. dilapidation rate, smoothness, deflection, friction coefficient are used as output layer. The relation between environment factor and pavement performance is acquired by introducing the module of BP Neural Network in MATLAB.

阐述了应用BP神经网络进行沥青混凝土路面使用性能预测的可行性，以环境因素，即交通量、降雨量、温度等3个直接使路面性能发生变化的主要因素作为BP神经网络的输入层，以沥青混凝土路面的破损率、平整度、弯沉值、摩擦系数等4项性能指标作为输出层，采用MATLAB语言中的BP神经网络模块进行自学习，得出环境因素与路面使用性能之间的关系。

Three main environmental factors——traffic,rainfall,temperature,which can lead to the direct change of pavement performance are used as the input layer of neural network.The performance indexes of asphaltum concrete pavement,i.e.dilapidation rate,smoothness,deflection,friction coefficient are used as output layer.The relation between environment factor and pavement performance is acquired by introducing the module of BP Neural Network in MATLAB.

阐述了应用BP神经网络进行沥青混凝土路面使用性能预测的可行性，以环境因素，即交通量、降雨量、温度等3个直接使路面性能发生变化的主要因素作为BP神经网络的输入层，以沥青混凝土路面的破损率、平整度、弯沉值、摩擦系数等4项性能指标作为输出层，采用MATLAB语言中的BP神经网络模块进行自学习，得出环境因素与路面使用性能之间的关系。

Multivariate regression analysis showed poor children's health status (OR=1.877, P=0.001), bad parental marital status (OR=1.768, P=0.004), and unjustifiable family rearing patterns [ over-interference (OR=3.004, P=0.006) and assentation (OR=5.430, P=0.032) ] were risk factors for the occurrence of emotional abuse.

多因素非条件logistic回归分析显示：儿童健康状况不良、父母婚姻状况不良，干涉型教育方式及盲从型教育方式是发生情感虐待的危险因素，而家庭气氛融洽以及儿童与父母亲的关系融洽是情感虐待发生的保护性因素。

Individuals with at least one risk factor of stroke were selected to receive a cerebral vascular hemodynamic index examination.

比较病例和对照组间脑血管血液动力学指标的差异，对研究因素进行单因素和多因素Logistic回归分析。

Strata quality factor and attenuation factor especially these of near surface, are studied.

对松辽盆地南部的地层品质因素和地层衰减系数、尤其是近地表的地层品质因素和地层衰减系数进行研究，进而研究了野外地震采集的激发和接受等各个因素。

To give the definition of the mass concrete and to concrete\'s cracks together with practical meanings of control ,and give a brief review on the research in the field at home and abroad, at last, methods to control temperature crack of the mass concrete from several aspects such as design measures,concrets material, construction schedules.etc are summed up; To explain the physical mechanics of the concrete and computing methods-Difference Method and Finite Element Method, and illustrate the application of their specific methods repectively;Several temperature factors that can influence the temperature stress of mass concrete baseplate are analyzed. The influence degree of temperature factor can be got through the ANSYS simulation computation the control of temperature can control the temperature stress, consequently control the temperature crack of mass concert baseplate; through the influence of the crack resistance ability of mass concrete baseplate which takes the reinforcement as a part is analyzed. By ANSYS simulation, the best suited volume ratio of reinforcement is found out, at same time the layout of reinforcement with the same volume ratio can also affect the resistance ability of mass concrete baseplate. Sum up of above analysis, anti-crack function of steel bar in early mass concrete baseplate is obvious, so it\'s necessary to consider beneficial effect of construction steel bar in research of temperature control on mass concrete baseplate.

本文先容了大体积混凝土及混凝土裂缝的基本概念，对国内外在这个领域里的研究现状作了扼要叙述，并从结构设计、混凝土材质、施工措施等方面总结了大体积混凝土温度裂缝控制的方法及防止措施；阐述了混凝土的基本物理力学性能，总结了大体积混凝土温度计算的方法——差分法和有限元法，并分别举例说明其具体应用的方法；分析了影响大体积混凝土底板温度应力的几种温度因素，利用ANSYS模拟计算，得出了每种因素的影响程度，通过分析提出了在这几种温度影响因素下如何通过控制温度以达到控制温度应力从而来控制裂缝的具体建议；针对大体积混凝土基础底板中配筋的不同对混凝土底板抗裂能力的影响不同，利用ANSYS进行模拟分析，得出底板中最合适的体积配筋率，同时分析了在相同体积配筋率下钢筋的具体布置对大体积混凝土基础底板抗裂能力的影响，分析表明，配置钢筋对混凝土结构的开裂阻止作用明显，在研究大体积混凝土温度裂缝题目时，要考虑钢筋在其中的有利作用。

In any case, its activity is profoundly modified by various factors, which may be of either nervous or chemical origin.

无论如何，它的活动受到各种因素的强烈影响，这可能是神经因素，也可能是化学因素。

As viewed from the composite scores of each factor, after the Asian financial crisis, China's capital inflow has been forwardly driven by the before-mentioned three factors, which is mainly decided by China's internal factor. And meanwhile, China's reform of exchange rate system and the changes of external factor also generated forward push on China's capital inflows.

从因子综合得分来看，在亚洲金融危机之后，中国资本流入受到上述三因素的正向影响，这主要是由中国经济的内部因素所决定的，同时我国汇率制度改革及外部经济因素变化产生的正向冲击也对中国的资本流入起到了一定的推动作用。

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。