管

The efficiency of preparation and obturation of root canals was analyzed with radiographs before and after operation.

两组均采用侧向加压充填法充填根管，通过术前、术后的x线牙片评价根管预备与根管充填的效果。

Objective:To observe the effect of electronic apex locator and trial point on the quality of root canal obturation.

目的 ：为改善根管充填质量，探讨根管长度测量仪加试尖对根管充填质量的影响。

This approach is base on the following idea:under not effect to the deformation of rectangular pipe,to change right angle to obtuse angle which is variant as some regular,make plain-barreled roll pass receive vertical roll shape pipe blank,and then let pipe blank entering into vertical roll pass.With continuous deformation, the difference between diagonal line of rhombus pass will be reduced to zero,finally changed into a square.

该方法的基本思路是：在不影响方矩形管变形的前提下，通过将孔型顶角由直角改为按一定规律变化的钝角，让呈卧菱形状的平辊孔型接纳呈立菱形状的管坯，接着让卧菱形状的管坯进入立菱形状的立辊孔型，随着变形的继续，逐渐缩小菱形孔型对角线之差直至为零，成为正方形。

On the basis of the orthogonal experiment, nine groups of structure parameters of variable cross_section tube s are issued.

根据正交实验设计提出了 9种变截面管强化传热管的结构尺寸，并由实验结果回归得到了变截面管的传热与阻力关联式。

The axial stress in tubes when the load transferring from outmost tube to inner tube is observed as well.

然后对双壁碳纳米管有限系统内管从外管中拉出时受到的轴向力进行了分析。

The theoretical and computational results show that an important reason resulting in eccentric wear of the inner cylinder and the pumping rod lies in the nonuniformity of the stress distribution on the outwall of the inner cylinder which yields excentralization effect of the pumping rod when swabbing fluid flows in eccentric annuli with the pumping rod moving axially in a well.

在实验上，通过不同重量百分比浓度的HPAM水溶液在内管做轴向往复运动的偏心环空中非定常流实验，把由理论公式算得的时间平均流量与实验中测得的时间平均流量做了比较，验证了本文数值计算幂律流体在内管做轴向往复运动的偏心环空中非定常流方法的正确性；上述的理论与计算表明，抽油机井杆管偏磨的一个重要原因是，在聚驱工况下，抽汲液体在抽油杆做轴向运动的井筒中流动时，抽汲液体作用在抽油杆外壁上的压力分布的不均匀性所引起的抽油杆在井筒中的偏心效应。

Presents a demonstration project of solar-ground source heat pump heating and cooling in severe cold area. According to the characteristics of the combination system of solar-ground source heat pump and floor panel heating in the project,puts forward a new operation mode and executes preliminary heating experiment.

介绍了严寒地区太阳能-地埋管地源热泵供暖供冷示范工程，针对示范工程中太阳能-地埋管地源热泵与地板辐射供暖相结合的特点，提出了严寒地区太阳能-地埋管地源热泵系统的新型运行模式，并进行了初步的供暖实验研究。

Result］ It could be concluded through analyzing the model that both the mass uncertainties of quinoline phosphomolybdate precipitates and tested samples were from the resolving power and precision of balance and its maximum tolerance in assay certificate; the uncertainty brought in by volumetric flask was from the permissible error of 250 ml volumetric flask, the operation of increasing the volume to scale of volumetric flask while diluting solution and the difference between experimental temperature and the temperature at the time when the volumetric flask was calibrated; the uncertainty brought in by pipette was from the permissible error of itself, the operation of increasing the volume to intake scale while taking solution and the difference between experimental temperature and the temperature at the time when the pipette was calibrated.

结果］磷钼酸喹啉沉淀和试样质量的不确定度均来自天平的分辨力、精确度、鉴定证书上天平的最大允差，容量瓶引入的不确定度来自250 ml容量瓶本身的允许误差、稀释溶液时将体积增加到容量瓶刻度的操作和试验温度与容量瓶校准时温度的差异，吸量管引入的不确定度来自于吸量管本身的允许误差、吸取溶液时将体积增加到吸取刻度时的操作和试验温度与吸量管校准时温度的差异。

Methods 140 patients were divided into experiment group（70 patients） and control group（also 70 patients） in random.In the experiment group we anesthetize,in infiltrating manner,the par laryngea pharynges by 2% lidocaine before intubation,and elevate the head when the gastric canal was inserted 10～15 cm and make sure the mandible close to sternum to augment to radian of the par laryngea pharynges.In control group we adopted the traditional manner.

将140例患者随机分为试验组和对照组各70例，试验组采用置管前使用2%利多卡因行咽喉部黏膜浸润麻醉，胃管插入10～15 cm时抬起头部使下颌骨贴近胸骨增大咽喉部弧度将胃管经口置入，对照组采用传统经口置入。

To solve the problem of complex process and high fabricating cost in the current fabrication techniques of carbon nanotube displays, a fully printing technique was presented to fabricate CNT-FED. All the inner structure cells, including cathode and anode electrode patterns, CNT arrays, phosphor dots and cathode and anode spacer, were fabricated by a screen printing process.

针对现有的碳纳米管场发射显示器制造技术中存在的工艺复杂、成本过高的问题，提出了用于制造碳纳米管场发射显示器的全印刷制造技术，即采用丝网印刷工艺制备CNT-FED器件内部包括各电极图形、碳纳米管阵列、荧光粉点阵和绝缘支撑层在内的所有结构。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。