在安全生产中如何提高女职工素质

构建和谐企业,离不开女职工的积极参与和大力推动,她们的素质如何,一定程度上影响着企业的和谐发展.因此,做好女职工工作,提高女工素质,既是企业快速发展的要求,也是构建和谐企业的需要.那么,如何提高女职工的综合素质,发挥其"半边天"的重要作用,文章结合铁运公司实际,谈论一些看法.     

Sedimentation processes and sedimentary characteristics of tidal bores along the north bank of the Qiantang Estuary

A tidal bore is a unique Earth surface process, characterized by its highly destructive energy, predictable periodicities and magni-tudes, and the production of characteristic sedimentary features. Tidal bores and associated rapid flood flows are highly turbulent flows of the upper-flow regime with a velocity over several meters per second. Reynolds (Re) and Froude (Fr) numbers, respectively, are larger than 104 and 1.0, making them significantly different from regular tidal flows but analogous to turbidity currents. Until now, understanding of tidal-bore depositional processes and products has been limited because of the difficulty and hazards involved with gauging tidal bores directly. The Qiantang bore is known as the largest breaking bore in the world. Field surveys were carried out in May 2010, along the north bank of the Qiantang Estuary to observe the occurrence of peak bores, including regular observations of current, water level and turbidity at the main channel. Several short cores were sampled on the intertidal flats to study the characteristic sedimentary features of tidal bores. Hydrodynamic and sedimentological studies show that the processes of sediment resuspension, transport and deposition are controlled primarily by the tidal bores, and the subsequent abruptly accelerated and decelerated flood flows, which only account for one tenth of each semidiurnal tidal cycle in the estuary. Tidal-bore deposits are generally poorly sorted because of rapid sedimentation after highly mixed suspension by intense turbulence. This behavior is characteristic of the absence of tractive-current depositional components in a C-M diagram. It also goes along with well-developed massive bedding, graded bedding, basal erosion structures, convolute bedding and dewatering structures. Together, these sedimentary features can constitute fingerprinting of turbidites, widely distributed in the deep-water environment. However, a tidal bore is triggered by intensely deformed tidal waves propagating into a shallow-water environment, which returns to regular tidal flows rapidly after the passage of the bore head. The tidal-bore deposits are usually bounded by the intertidal-flat deposits with typical tidal beddings at the top and on both flanks. The difference between tidal-bore deposits (TBD) and tidal sandy/muddy deposits (TSD/TMD) is evident not only in sedimentary structures, but also in the grain-size composition. They can be clearly distinguished in grain-size bivariate plots, typically the plot of mean grain size vs. standard deviation (or sorting). Some trend variations generally exist in mean grain size with TBD>TSD>TMD, sorting with TMD>TBD>TSD (larger value indicating poorer sorting), and both skewness and kurtosis with TSD>TBD>TMD. These findings will undoubtedly shed new light on our understanding of tidal-bore sedimentology, ancient tidal-bore sedimentary facies and environments, and related oil-and-gas field prospecting.     

汽轮机安全监视系统在300MW机组中的应用

以国产300MW机组为例,介绍了汽轮机安全监视系统的主要监测参数、基本组成、工作原理以及其静态调试和安装联动情况。     

匀加速行驶车辆与桥梁耦合振动的分析方法

为了分析匀加速行驶车辆与桥梁的相互耦合作用,在重点考虑了移动车辆的牵连惯性力及其行车加速度对桥梁竖向振动作用的条件下,建立了匀加速移动的四自由度车辆模型与桥梁耦合振动微分方程;利用有限元的求解方法,在匀加速移动车辆的初速度和加速度2个运动参数变化情况下,得出了桥梁的动挠度响应规律。数值分析表明:车辆初速度和行车加速度对桥梁动力系数影响较大;随初速度的增大,桥梁动力系数增大;随加速度的增大,桥梁动力系数先增大、后减小,存在一个最值区域。     

国产干酵母活化方法的研究

本试验利用土豆汁、活化液、土豆汁加活化液对丹宝利和梅山两种国产干酵母分别进行了活化，并测定其发酵力。结果表明，对于丹宝利活化最佳工艺为利用活化液活化４５ｍｉｎ，对于梅山活化最佳工艺为利用５％土豆汁和活化液共同活化１５～３０ｍｉｎ，两种干酵母发酵力分别提高９０ｍｌ和１２１ｍｌ，这为国产干酵母替代进口干酵母提供了依据。     

残余压力场下的疲劳裂纹扩展特性

以１６Ｍｎ钢焊接接头为研究对象，对焊接残余压应力场下的疲劳裂纹扩展特性进行了研究．测定了应力比为０．２，０．４，０．６条件下，母材、热影响区、焊缝的疲劳裂纹扩展速率，同时对残余压应力场的变化情况进行了分析和研究，提出了预测１６Ｍｎ钢焊接接头疲劳裂纹扩展速率的数学模型     

摩擦焊直接能量控制法的研究

摩擦焊直接能量控制法是一种以摩擦能量为控制对象的闭环控制方法。采用先进的单片机测控及高精度的检测方法，直接检测驱动电机的实时输入功率以获得实时摩擦能量；并以此为闭环控制对象，对焊接过程进行控制，同以往开环控制法相比，克服了工艺参数的波动对接头质量的影响，从而大大减少了焊前工作量；同时也减少也人为因素对接头质量的影响，使焊接质量达到一个新水平。     

新型蓄电池充放电专用节能装置

蓄电池应用十分广泛，对充、放电设备性能要求也越来越高。以前对蓄电池充、放电采用两套独立设备，在放电时以纯电阻为负载，将大量的电能转变为热能而浪费了。本装置既可作充电的电源，又可作放电的负载，将放电的电能通过有源逆变电路回馈到电网，得到再生利用，可以节约大量电能，具有推广应用价值。     

激光在水中产生超声波的实验研究

用ＹＡＧ脉冲激光在自来水中产生超声波，用丹麦制造的水听器接收水中声波，在示波器上显示其波形并分析了产生声波的机理及特征．结果表明，当光源的脉冲宽度为８ｎｓ时，在混响声场中接收到声脉宽约为２ｍｓ；而在自由场中为１～２μｓ．所以，在理想的情况下，声脉冲宽度应和光脉冲宽度同数量级．