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Based on the noise theory and experi mentation ,the author founded the onli ne method to test current noise , validated the relation bet ween te mperature ,aperture and pressure with current noise .This paper firstly analyzed gener— ati ng mechanis mof discharge niose ,studied the measure and factor of discharge niose ,i ndicated an effective method for degradi ng the discharge noise ,which pro moted the performance of laser gyro fro m0.01°／h to 0.001°／h.

文中以氦氖气体激光器的噪声特性理论为指导，以试验研究为基础，建立了在线噪声电流测试方法，通过试验验证了温度、腔体毛细孔径、谐振腔充气气压等参数与放电噪声的关系，首次提出了放电噪声产生的机理，分析了电流噪声的检测方法及影响因素，给出了减小和抑制放电噪声的有效方法，使得激光陀螺的性能由0.01°／h 提高到0.001°／h。

It has been indicated that Yw18 could utilize methylparathion and ρ-nitrophenol,a main metabolite product for the insecticide,as sole source of carbon and it was identified as Ochrobacterum sp,and capable of degrading 50 mg·L-1 of methylparathion,ρ-nitrophenol,rapidly in 0.5 h and 8 h respectively,after analyzing metabolite products with ga...

用气相色谱法和分光光度法对Yw18的降解性能进行了研究，结果表明，在0.5 h内它对50 mg.L-1甲基对硫磷的降解率达90%以上，在8 h内能将50 mg.L-1对硝基苯酚完全降解。对该菌进行了系统发育研究，并用PCR法克隆其甲基对硫磷降解酶基因mpd。

The numerical results show that our method is effective. For the noncharacteristic Cauchy problem for 2-D and 3-D heat equation, we give the explicit H\"{o}lder type stability estimates by using weighted energy method. Especially,H\"{o}lder type stability estimate for discrete solutions of the heat equation is obtained through a fully discrete method. The numerical results are presented.

对于二维和三维的热传导方程的非特征Cauchy 问题，我们利用权函数方法，给出了一个显式的H\&{o}lder 型的稳定性估计，特别的，对于二维的非特征Cauchy问题，我们利用充分离散的方法，对二维问题的离散形式同样给出了H\&{o}lder 型的稳定性估计，同时，我们也给出了数值例子来说明我们的估计。

Whereas H.263 standard is used comprehensively in the video communication field, the design is based on the theory of modularization and objectization. Easy to be diplexed, the program can be applied to video player developed with H.263 standard, reducing the difficulty of developing the application software.

鉴于H.263标准在视频通信领域的广泛应用，该设计基于模块化和面向对象的思想，程序具有良好的复用性，也可以应用于采用H.263标准编码的视频文件的播放器中，降低了应用软件开发的劳动强度。

Compared with theoretical values 49.0%C,7.8%H,17.1%N the elemental analysis results of YXA2.3 that was 45.1%C,4.7%H and 11.1%N showed that oxycellulose chloride were aminated only partially in about 45%yield because of their huge molecular volume.

对YXA2.3进行有机元素分析结果为：C 45.1，H 4.7，N 11.1(理论值为：C 49.0，H 7.8，N 17.1)，其中11.1＜17.1，4.7＜7.8，这是由于大分子的特性，氧化纤维素的氯化物只部分发生的胺化。

The plant species diversity of 9 associations in the Oxytropis coerulea community of mount Wutai was studied by using richness index, Simpson index, Shannon-Weiner index and evenness index, respectively. The results indicated that: The quantity of populations and species in the community have obvious unevenness character, which leads to variation of λ. index and H' index among different associations. R1 and H' increase firstly, and then decline slowly with the increase of elevation, which reach peak value at 2100 while E1 index waves steadily with elevation change.

应用丰富度指数(R1)、Simpson指数、Shannon-Weiner指数和均匀度指数(E1)研究了9个群丛的植物种多样性，结果表明：种群数量及其种群内个体数量具有明显不均匀性，进而导致λ指数和H'指数在不同群丛间的变化，R1、H'指数随海拔高度增加表现为先上升而后缓慢下降，在海拔2100m处达峰值，E1指数则随海拔变化呈现不稳定波动。

Sample 8, a paraffinic mineral oil,(Figure 2.7, h), at 4 ms-1, 50oC has a film thickness of 263 nm whilst at 150oC, the film thickness 'h' is only 43 nm.

样品8日，石蜡矿物油，（图2.7 ， h ）项，在4毫秒- 1 ， 50oC了薄膜厚度的263纳米，而在150oC ，薄膜厚度的H是只有43纳米。

Results The optimum conditions for the extraction of Peucedanum praeruptorum Dunn was as follow: 80 % alcohol was used as solvent, and 8 times the amount of alcohol was added, the mixture was kept refluxing for 1.0 h for the first time; then 6 times the amount of alcohol was added and the mixture was kept refluxing for 0.5 h for the second time; Four times the amount of alcohol for 0.5 h for the last time.

结果 白花前胡的最佳提取工艺为用质量分数80 %的乙醇提取3次，提取时间分别为1.0、0.5、0.5 h，3次所用溶媒量分别为药材质量的8、6、4倍；按照筛选出的最佳工艺条件进行的3次重复性实验，测得浸膏中8-甲氧基补骨脂素含量质量分数为0.094 %，折合1 g生药中含量为0.171 2 mg，与预测值基本一致。

GAP gene was found to be a good internal control for the first time for studying gene expression in H. polymorpha. It was shown by Northern hybridization that H-OLE1 gene was expressed in H.

为研究H-OLE1基因的转录及其调节规律，通过一系列实验，首次找到了可在研究多形汉逊氏酵母基因表达时用作内标的GAP基因。

Cerevisiae GAPp, suggesting that H. polymorpha △9-fatty acid desaturase was compatible with desaturation system of S. cerevisiae whereas the promoter of H-OLE1 gene had no activity in heterologous cells.

说明H-OLE1基因编码△9-脂肪酸去饱和酶，多形汉逊氏酵母的△9-脂肪酸去饱和酶和酿酒酵母的脂肪酸脱饱和系统相亲和，而H-OLE1基因的启动子在异源细胞中没有活性。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。