If we known radius distribution of media grains and add the thermal perturbation on the normal thermal gradient , thus it lead to unremitting the dynamics process of heat and mass transportation and chemical interaction in the area 并使用此模型研究了局部的温度变化和颗粒半径不均一分布对研究区域内温度场和浓度场的变化情况，其结论是它们之间的耦合可能打破系统的平衡，驱使系统长时间持续进行流体输运反应动力学过程。
" our results indicate that a modest but chronic reduction of just one hour of sleep nightly in early childhood can affect the child ' s cognitive performance at school entry , " says dominique petit , a sleep researcher and coauthor of the study 睡眠研究专家、该研究报告的撰写者之一多明尼克?派提特说： “我们的研究结果表明，在幼童时期，每晚的睡眠时间哪怕只减少一个小时，长时间持续这种状况都会影响孩子上学时的认知表现。 ”
The results show that a warm high ridge at the middle level and transformed surface cold high over the plain provide a good background condition ; a cooling process produced by net surface radiation fluxes is the trigger and strengthening mechanism for the fog event ; the subsidence flow at the middle and low tropospheric levels is favorable for the setting - up and maintenance of stable stratification at the boundary layer and weak wind condition at the ground layer over the fog region ; the transportation of weak warm advection at lower levels and weak lift motion at the boundary layer play a very important role to the long maintenance of the fog event ; the intrusion of north wind accompanied by cold advection is a main dynamic factor of the fog dissipation 结果表明：在中高层暖性高压脊及地面变性冷高压稳定维持的大尺度背景条件下，地表净辐射引起的近地层冷却是大雾过程的触发和加强机制；中低空下沉气流的存在有助于近地层的弱风条件和稳定层结的建立；低层暖平流的输入和边界层的浅层抬升是大雾长时间持续的原因；伴随冷空气南下的偏北大风是驱使大雾消散的动力因子。
" anchor " have developed new resin bonding " bsd " " bsw " which are special designed for surface grinding to achieve better cutting ability and longer wheel life . the performance of cutting ability is remain the same level and continued for a long time . wheel dressing times and wheel consumption can be reduced to minimum for improving working efficiency and making total grinding cost down 平面研磨发展至今，趋往高精度高精密之研磨要求而研磨材质也演变成选用高硬度及难研削材，因此，在整体研磨加工要求变的如此严苛情形下，嘉宝特别新开发bsd及bsw平面研磨专用树脂结合剂，此新开发之结合剂用于平面研磨时能发挥出比以往制品更佳之切削力及耐用度表现，且其优异的切削表现能长时间持续，可大幅减低砂轮修整次数及砂轮损耗，进而提升工作效率降低整体研磨成本。
According to the current situation of our country ' s highway transportation development , this paper has put forward the main problems of sustainable development of highway transportation confronts us ; through the identifying of the affecting factors in sdsht and based on time durability , the paper has classified the factors into long - period , middle - period and short - period factors , as well as strategy and suggestions to realize sdsht 根据我国公路交通发展现状，提出我国公路交通可持续发展面临的主要问题；依据公路交通系统可持续发展影响因子辨识，按照影响的时间持续性，将其分为长时段影响因子、中时段影响因子和短时段影响因子，并进行了分析；提出了实现公路交通可持续发展战略对策建议。
