精密度

Orthogonal experimental method is applied to design experiments of diamond mill wear. Basalt is milled on CNC stone machine with electroplated diamond mill. The diamond mill is made with electroplated method and lost mass of diamond mill is measured with high precise balance.

采用正交实验方法设计金刚石铣刀磨损实验，在数控石材机床上铣削玄武岩，金刚石铣刀采用电镀法制造，铣刀磨损量采用高精密度电子天平测量。

The equivalent point is calculated by thesecond derivative method,which insures a precise detection range of sulfur contentin dye bath from 0.1 to 0.00001 moles/liter.

其测定硫浓度范围在10~(-1)—10~(-5)mol/L 内。实验结果表明，此法操作简便，速度较快，重现性好，回收率达到95%以上，精密度小于5%，是目前测定染液硫含量的一个灵敏方法。

Carbon nanotubes after oxidation and purification were used to pack a micro-column which was incorporated into a sequential injection system for facilitating online selective sorption of lysozyme from egg-white. The retained protein was afterwards quantitatively eluted by a carbonate buffer. With a sample loading volume of 2.0 mL, an enrichment factor of 12 was obtained, along with a retention efficiency of 100% and a recovery rate of 100%.

将多壁碳纳米管经氧化和提纯后装入固相萃取柱，在顺序注射系统中实现对蛋清中溶菌酶的在线选择性萃取，以碳酸盐缓冲溶液定量洗脱，进样量为2 mL时，富集倍率为12，吸附率和洗脱率均为100%，采样速率为10 h^(-1)，精密度为3.0%。

Methods The sample was separated with a C18 column (150mm×4.6mm, 5μm) at 30℃ with the mobile phase of methanol and water (74:26); A fluorescence detector was used (λex=230nm λem=460nm); The floss rate was 1mlmin^(-1) Results The retention time of aesculin was(3.620±0.05)min; A good linear relationship of aesculin in the plasma samples at the concentration between 0.1mgL^(-1) and 100mgL^(-1) was observed (r=0.997); The mean absolute recovery was 74.0%~82.6% and the lowest detective limit was 0.05ng; Both the intra-day and inter-day precisions were less than 9.0%.

以C18柱(150mm×4.6mm，5μm)分离；流动相为甲醇－水(76：24)；流速：1mlmin^(-1)；柱温：30℃；荧光检测器，激发波长230nm，发射波长460nm：结果秦皮甲素的保留时间为(3.620±0.05)min；血药浓度在0.1~100mgL^(-1)范围内线关系良好(r=0.997)；绝对回收率为74.0%-82.6%，日内、日间精密度均＜9.0%，最低检测限为0.05ng。

Discuss how to make internal and external casings, optimization of experimental parameters, the influence of general coexistence ions and its accuracy and precision.

考察了内外套管的制作方法、实验参数的优化、常见共存离子的影响及该法的准确度与精密度等。

The method of determination of cyclamate in foods adopts Carrez reagents and ultrasonic extraction to eliminate the effect of protein and so on, use ultrasonic extraction and large caliber capillary. It is simple, rapid, with high precision and accuracy of the merits.

通过对样品采用Carrez试剂消除蛋白质等影响，超声波萃取，使用大口径弱极性毛细管具有简便、快速，精密度和准确度高的优点。

Ideally, reference dosimeters should be used for the dose mapping exercise because of their greater precision.

理想的情况是，在确定剂量分布图时，使用参考的辐射测量器，因为它们有更好的精密度。

Results The linear range of cyclosporin A was 50 ng/ml～2 000 ng/ml(r=0.999 8). The average recovery was 99.7%(n=5). Within??day and between??day variation co??efficients were less than 6%.

结果：环孢素A浓度在50 ng/ml～2 000 ng/ml范围内线性良好(r=0.999 8)，平均方法回收率为99.7%，日内及日间精密度＜6%(n=5)。

October 2005 to develop a new generation of flash color names chain, the product is to use high-precision machine sculpture carved out in normal light, will issue a dazzling sheen.

2005年10月开发出新一代的闪光彩色姓名链，该产品是利用高精密度雕刻机雕刻而成，在正常的光线下，会发出耀眼的光泽。

The experimental evaluation was done by means of degree of accuracy,precision and sensitivity,and by compa ring with gas chromato-graphy method which is standard method of our countr y.

以黄瓜为试材，通过准确度、精密度和灵敏度的分析，以及与国家标准方法--气相色谱法的比较，对该方法进行了实验学评价。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。