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The algorithm for optimizing the parameters of the measuring system were proposed; The distribution and propagation patterns of the measured errors for all the harmonics of roundness were studied in detail; A software for correcting the errors caused by the measurement error of the angle positions of the probes and the sensitivity difference between three probes was presented.

分析了测头读数及角位置误差对圆度各次谐波及圆周各点测量精度的影响;提出了三点法测量系统的优化策略与算法;研究了三点法测量误差的分布与传递规律;提出了克服测头定位误差以及3个测头的灵敏度不一致影响的软件校正方法。

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,其厚膜型气敏元件在350℃时对丙酮、乙醇、正丙醇、甲醇、甲醛等有机气体的气敏性能测试表明: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气体的气敏性能;而Ti元素的适量掺杂可以极大地改善LaCrO_3的气敏性能,使之显示出对丙酮气体的高灵敏度和快速响应恢复能力。

As a tracing agent , the radioactive isotope has a high sensitivity for detection.

放射性同位素作为示踪剂,其检测灵敏度高,在染色和盐类示踪剂不能奏效的情况下,放射性示踪剂都能得到成功。

The prior HIV-1 p24 antigen testing method has problems of low sensitivity, rigmarole operations and the like.

现有HIV-1 p24抗原检测方法存在灵敏度不高、操作繁琐等问题。

When only using this mode, the disadvantage lies in that in the case of incomplete shielding, a supersensitive electromagnetic receiver can still acquire information

单一使用这种模式的缺点是,如果屏蔽不能彻底,高灵敏度的电磁接收设备还是可以获取信息。

The sensitivity and specificity of far-infrared thermography in the diagnosis of lumbar disc herniation were evaluated. Compared with the normal, the thermogram of twenty-three cases on low back with LDH changed. They can be divided into four thermal patterns that is shuttle-liking (8 cases), discontinued in the middle line (6 cases), large regional (5 cases) and nonregular (4 cases) pattern. The temperature of abnormal sides is lower than the counterpart in most cases (nineteen of twenty-three). The thermography diagnosed LDH with sensitivity 90.48% and specificity 66.68%.

结果 F-IRT显示:23例LDH患者腰骶部热形态改变为四种形式:梭形,热区向一侧偏歪或呈角状突起(8例);夸中线热区不连贯(6例);骶髂骨上缘呈大片高温热区(5例);不规则形态(4例),患侧下肢较相对应的对侧胶体的温度,至少有一个患侧部位出现温度下降的有19例(82.61%),综合CT与F-IRT结果分析:F-IRT诊断腰椎间盘侧后突的灵敏度为90.48%,特异度为66.68%。

In this paper, total logistics amounts are chosen as evaluation index, and artificial time series are designed to solve the shortness of statistical data in Chinese logistics. Spectrum estimation theory depicts time characteristics in frequency domain thus has such benefit than time domain methods. This paper evaluates the period of Chinese logistics using spectrum estimation. Stationarity of artificial series is verified, parameter sensitivity of truncation point is analyzed, six periods with different delay window are compared, and significance of period evaluated is tested.

中国物流统计数据缺乏,客观上限制了对其周期规律的研究,本文选取社会物流总额作为测度指标,设计了一种人工序列,解决了统计数据过短问题;谱估计法从频域角度揭示客观事物的时间特性,在研究时间序列周期波动方面具有时域分析法所不具备的优势,作者采用谱估计法对中国物流发展周期进行测定,检验了指标序列平稳性,分析了截断点参数灵敏度,比较了6种不同滞后窗下周期值,并检验了所测得周期的显著性。

Grounded faults occur on transmission lines, may cause malfunction of currently available zero sequence directional element when zero sequence voltage can't meet the sensitive requirement.

输电线路发生接地故障时,可能因零序电压不满足灵敏度要求,而导致零序方向元件误动或者拒动。

Results show that ammonia volatilization was not detected in all the treatments during the tomato growing season. It was presumed that ammonia partial pressures on the surface soil were lower than the detection limit of the method, as a result of the low ammonical N concentration and low pH in the surface soil.

结果表明,番茄生长期间全部处理均未检测到氨挥发,其原因是土表氨分压低于检测灵敏度,较低的氨分压是由于表层土壤的铵态氮浓度和pH都不高所致。

UDZ Series liquid level indicator of flap disassembly fast and convenient, the installation position can be arbitrary choice, free to change the direction of observation, thus instrumented great visibility; UDZ series of cost-effective liquid level was significantly higher than that used multiple sets of glass plate liquid level of cost performance; UDZ series of liquid level indicator, the sender's device, as well as the liquid level with the main transmission medium within the complete separation of the measured structural design, so that level gauge in the job has pressure (up to 320KG), toxic and inflammable conditions, with absolute safety and reliability; UDZ-3 type uses innovative design, improve the sensitivity of the sensor, and its near-zero drift FarEasTone signals and long-term stability so that it has always been at the scene consistent level instructions; sensors and the main body has a certain interval, which can be solved effectively under high-temperature liquids (up to 480 ) remote detection and control; antifrost type UDZ Series Level Gauge, are I plant the patented product (Patent No.: ZL00221022 3), guarantees that the use of cryogenic liquid level gauge is not freezing (such as liquid CO2), the effective guarantee of the level of a normal job.

UDZ系列液位计的翻板指示器拆装快捷方便,安装方位可任意选择,观察方向可随意改动,因而仪表指示的可视度很大;UDZ系列液位计的性能价格比明显高于采用多组玻璃板式液位计的性能价格比;UDZ系列液位计的指示器,发讯器、以及液位变送均与主体内被测介质完全隔离的结构设计,使液位计工作在有压(可达320KG)、有毒和易燃的工况下,具有绝对的安全性和可靠性;UDZ-3型采用了新颖设计,提高了传感器的灵敏度,其远传信号近乎零温漂和长期稳定性使其始终于现场液位指示保持一致;传感器和主体有一定的间隔,因而能有效地解决高温液体(可达480℃)远距离检测和控制;防霜型UDZ系列液位计,是我厂的专利产品(专利号:ZL00221022·3),保证了在低温液体上使用液位计不结冰(如液体CO2),有效的保证了液位计的正常工作。

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。