In order to find out the epidemiological features of preschool unintentional injuries and provide some theoretical basis for adapting the effective interventions to reduce the incidence rate of preschool unintentional injuries, a random sampling study was conducted among 2757 preschool children aged 3-7 years old in Wuhan city.
伤害使儿童、青少年早死或残疾，给家庭和社会带来巨大负担，早死人数的多寡直接影响到人口平均期望寿命的高低。为了解学龄前儿童意外伤害流行病学特征并提出预防干预对策，对武汉市部分城区学龄前儿童意外伤害的发生进行了现场调查研究。
objective to compare the two methods of relieving pain in the artificial abortion in the clinic. method injecting cervix with lidocaine, infusing propofol intravenously and without analgetics were given to 300 patients of artificial abortion at random to compare the difference analgesia effects of vital sign, symptom-complex of artificial-abortion, distension of cervix entrance, blood loss and amplitude of uterine contraction. results it showed that the breathing frequency of propofol group droping in the 100% analgesia effect of propofo group; but the incidence rate of sympton -complex of artificial-abortion of the frequency is low; , there is no difference between lidocaine and propofol; no difference of blood loss and amplitude of uterine contraction among the three groups.
300例人工流产患者随机选用利多卡因宫颈注射、丙泊酚静脉注入及均不使用任何药物镇痛，比较使用镇痛方法后生命体征、人工流产综合征、宫颈口扩张变化情况、术中出血和子宫收缩幅度的差异。结果丙泊酚组呼吸频率下降，镇痛效果满意度达100%，利多卡因组镇痛效果较差，前组人流综合征发生率低；利多卡因组扩宫颈效果与丙泊酚组无差异；三组术中出血与子宫收缩幅度无差异。
In the measurement of sound absorption coefficient in random incidence and determination of sound power levels of noise sources, the reverberation room is used very extensively.
混响室是声学专业的实验室用房，它在测量声波无规入射时材料的吸声系数和测量噪声源的声功率级中得到了广泛应用。
On the basis of the introduction of developments of active structural acoustic incidence control, feedback control method has been used here to control random incident noise transmission through a panel into a cavity.
在介绍有源结构声传入控制研究进展的基础上，本文用反馈控制方法对无规入射声场通过板向闭空间的传入进行了控制。
The Mueller matrix solution of vector radiative transfer for inhomogeneous random media of non spherical scatterers under a pulse incidence is presented. Co polarized and cross polarized bistatic scattering echoes can be numerically simulated.
给出非均匀分层、各层各异非球形粒子随机介质在脉冲波入射下矢量辐射传输方程（VRT）的Mueller矩阵解，数值模拟了极化后向散射。
In the measurement of random-incidence scattering coefficient by synchronized averaging of the impluse responses, the sound energy decay curve obtained by the backward integration of the squared averaged impulse will be influenced by the correlated components among these responses.
用脉冲响应同步平均法测量无规入射散射系数时，叠加后再经反向能量积分得到的声能衰减曲线，会受到不同脉冲响应中散射成分相关的影响。
The intensity profiles are obtained at different angles of incidence by simulating light scattering from random surfaces, and by fitting these simulated profiles with a symmetrical decay function we obtain the variation of the half-width of the corresponding profiles versus the wave vector.
通过对自仿射分形随机表面光散射的计算模拟，得到在不同入射角下的散射轮廓，并由数学上的对称下降函数拟合，得到轮廓函数的半宽度及其随入射光波矢量的变化关系。
Theoretical analyses of fracture regulation of homogeneous rock bar in case of random incidence of stress wave
应力波随机入射情况下均质岩石杆件断裂规律的理论分析
Random-incidence and diffuse-field calibration of sound level meters
GB/T17312-1998声级计的无规入射和扩散场校准
[Methods] Malaria incidence was surveyed over family-to-family by stratified random sampling method. Actual malaria incidence and rate of missing report were estimated by Capture-re-capture method (CRM).
[方法]采取不等比例分层随机抽样方法，逐户调查疟疾发病情况，采用捕获一再捕获法（Capturere-capturemethod，CRM）估计、分析全县疟疾实际发病率和漏报率。
Analysis of Sound Energy Decay in Measurement of Random-Incidence Scattering Coefficient
无规入射散射系数测量中的声能衰减分析
Random-incidence scattering coefficient is the ratio of the scattered acoustics energy to the total reflected energy from a surface in a diffuse sound field. It is an important parameter in the prediction of sound field by computer simulation.
无规入射散射系数是在扩散声场中界面散射声能与总反射声能之间的比值，它是采用计算机模拟来对室内声场进行预测的重要参量。
The effect of deep tube well use on the incidence of childhood diarrhoea was assessed using a random effects negative binomial regression model.
采用随机影响负二项回归模型，评估深管井的使用对儿童发生腹泻的影响。
Three random incidence sound field models were considered: (1) single frequency random incidence sound field is stochastic processes in space.
在计算时，考虑了三种无规入射声场的模型：（1）单频无规入射声场为空间分布的随机过程；