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Following are summary of our works:(1)The powders of LaCr_(0.9)Co_(0.1)O_3, LaCr_(0.9)Fe_(0.1)O_3, LaCr_(0.9)Ni_(0.1)O_3, LaCr_(0.95)Sn_(0.05)O_3 and LaCr_(1-x)Ti_xO_3(x=0.0-0.3) were single perovskite phase with orthorhombic structure. The gas-sensing properties of their thick film sensors were tested in the acetone, ethanol, normal propyl alcohol, carbinol and formaldehyde organic gases. The sensitivity of the sensors can not be enhanced effectively by doping Co、Fe、Ni、Sn elements in B-site of LaCrO_3. Ti dopant with proper concentration can greatly improve the gas-sensing properties, which make the sensor display higher sensitivity and quicker response-recovery characteristics.

所得结果摘要如下:(1)LaCr_(0.9)Co_(0.1)O_3、LaCr_(0.9)Fe_(0.1)O_3、LaCr_(0.9)Ni_(0.1)O_3、LaCr_(0.95)Sn_(0.05)O_3和LaCr_(1-x)Ti_xO(来源:ABfd1dC论文网www.abclunwen.com)_3(x=0.0-0.3)粉体为正交单相钙钛矿结构,其厚膜型敏元件在350℃时对丙酮、乙醇、正丙醇、甲醇、甲醛等有机体的敏性能测试表明:0.1mol Co、Fe、Ni和0.05mol Sn元素在LaCrO_3的B位进行掺杂后,不能有效提高材料对以上测试体的敏性能;而Ti元素的适量掺杂可以极大地改善LaCrO_3的敏性能,使之显示出对丙酮体的高灵敏度和快速响应恢复能力。

After 150 s discharge with oxygen bubbling at 667 m~3/(m~3h) aeration intensity, the inactivation efficiencies of saprophytic bacteria, iron bacteria and sulfate reducing bacteria achieved 1.85, 4.51 and 5.70 log reduction, respectively.

考察了电导率、细菌初始浓度和Fe~(2+)对NTP杀菌的影响,同时考察了曝源(O_2、N_2和空)和曝强度对NTP杀菌的影响,试验表明曝有利于杀菌,曝O_2的效果最好。

The article is primarily focused on the flora of subaerial algae of zonal vegetation in terrestrical ecosystem of NECT、subaerial algae's distribution regularity and the aspect both the natural and artificial disturbance which affect it's distribution.

本文着重研究了中国东北森林—草原样带中陆地生态系统中的各地带性植被内亚生藻类的种类组成、亚生藻类在各地带性植被内的分布规律及影响亚生藻类分布的一些自然因素,同时也研究了某些人为干扰对亚生藻类分布产生的影响。

Theoretical basis of thermodynamics on fluid phase balance is studied in this paper, and estimating rule of thermoelectrical equilibrium with interfacial phenomena is analyzed. Adsorption theoretical model is evaluated on the base of essential theory of adsorption.

本文研究了流体相平衡的热力学理论基础,并分析了存在界面现象时的热力学判据,研究了吸附的基本理论,选择了空穴溶液理论模型计算凝析在多孔介质表面的吸附;应用晶格理论吸附模型计算凝析油在多孔介质表面的吸附;应用相吸附数据计算二元液相吸附,作为应用晶格模型研究多元液相吸附的输入数据,并且首次考虑液混合吸附,以凝析油的临界流动饱和度作为判断液混合吸附还是单纯的液相吸附的条件。

According to the full model of the whole process obtained through simulation, this paper emulated varied cases and analyzed sensitivities under the different feed flow, H_2S content, shifted gas/unshifted gas ratio, liquid/vapour ratio, N_2 flow used to stripping, H_2O concentrate in loan methanol, and calculated hydraulics of every columns.

根据模拟得到的整个工艺流程的完整模型,本文对变工况条件进行了仿真计算,对处理原料负荷、进口原料H_2S含量、变换与未变换负荷比、液比、提N_2量、贫甲醇水份的变化进行了工况研究与敏感性分析,并对各塔进行了水力学模拟计算分析。

To be aimed at the problems that vari- ous details were not paid enough attention to during the cal- ibration on the gas logging unit on wellsite,thus errors were caused and the accuracy of gas logging data were influ- enced,the paper analyzed the reasons of influencing the cal- ibration accuracy of gas logging .

针对现场工作人员在测仪标定过程中的很多细节没有引起足够注意,造成标定时产生误差,从而影响测数据的准确性的问题,从色谱仪器工作原理、标定方法等方面分析了影响测录井仪器标定准确性的原因,对提高现场测录井数据准确性具有一定的指导作用。

Si ingots were studied under different ultrasonic frequencies,e g without degasser and ultrasonic,with degasser only,with degasser and ultrasonic under constraint cooling in the bottom of the ingot.

研究了不同超声波频率下熔体处理方法对Al-1.65%Si铸锭除的影响,如:没有添加除剂和超声波处理、只添加除剂不进行超声波处理、铸锭底部强冷情况下既添加除剂又进行超声波处理的情况。

The effects of the melt treatment methods on the degassing efficiency of ultrasonically refined Al-1.65%Si ingots were studied under different ultrasonic frequencies,e g without degasser and ultrasonic,with degasser only,with degasser and ultrasonic under constraint cooling in the bottom of the ingot.

研究了不同超声波频率下熔体处理方法对Al-1.65%Si铸锭除的影响,如:没有添加除剂和超声波处理、只添加除剂不进行超声波处理、铸锭底部强冷情况下既添加除剂又进行超声波处理的情况。

City distribution system is begin from distribution substation, nature gas flows through dust exhauster, dump valve, flowmeter odorizer and then through all levels of distribution network directly to the consumer according to the requirement.

而城市配系统又是从配站开始的,天然在配站内经过除尘、调压、计量、添味后,然后通过各级配管网和体调压装置保质保量地根据用户要求直接地向用户供

Expiratory time is measured from the beginning of exhalation to the beginning of the next inspiration .

时间测定是呼开始到下一次呼开始。这里的&呼&应该是&吸&吧?麻醉学相关临床指南汇总!

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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。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力