分离系数

The problem of the Hawking evaporation of Dirac particles in general spherically symmetric and charged evaporating black hole background is thus solved.

本文对一般球对称带电蒸发黑洞中Dirac粒子的Hawking辐射进行研究。利用零标架和旋系数方法，讨论了该时空背景下Dirac方程的退耦与分离变量。

The correlation coefficient stationary process in which the mean and variance vary with time is familiar in engineering,and the traditional correlation function stationary process is just a special case of that.

相关系数平稳过程是从非平稳过程中分离出的一类工程上常见且便于研究的随机过程，其均值和方差都可随时间变化，传统的平稳随机过程是它的一个特例。

The correlation coefficient stationary process in which the mean and variance vary with time is familiar in engineering, and the traditional correlation function stationary process is just a special case of that.

相关系数平稳过程是从非平衡过程中分离出的一类工程上常见且便于研究的随机过程，其均值和方差都可随时间变化，传统的平稳随机过程是它的一个特例。

From the lifespan of relay point of view, a reliability criterion was provided based on dynamic characteristics of anti-forces. Mathematical model of tolerance design with reliability was set up under usage of "stress-strength interference method", taken some critical dynamic characteristics as identification objects such beginning of contact separation speed, speed of collision and gag bit impact velocity. This model showed that lower values of characteristic parameters center and quantitative descriptively relationship between tolerance and product reliability. Multi-objective optimization model of relay tolerance distribution was completed when some factors such as reliability, processing costs and its feasibility into consideration. Based on Analytic Hierarchy Process to determine weight coefficients of various objectives, and usage of simulated annealing, this study performed optimal reliable tolerance allocation of space electromagnetic relay, and then key technology segments were analyzed, accompanying its course measured by controlling chart.

从继电器电寿命的角度，基于动态吸反力特性的配合提出了继电器的可靠性判别准则；在此基础上以触点分离初速度、触点碰撞速度以及衔铁碰撞速度等关键动态特性为判别对象，采用"应力-强度干涉法"建立了继电器可靠性容差设计数学模型，给出了下位特性参数中心值及其容差与产品可靠度之间的定量描述关系；综合考虑可靠度、加工成本及加工可行性等因素建立了继电器容差分配的多目标优化模型，基于层次分析法确定了各目标的权重系数，并采用模拟退火法实现了航天电磁继电器的可靠性容差最优分配；研究了继电器的关键工艺环节，并通过控制图对其过程能力进行了分析。

Soil drying increased the bound water and modulus of bulk elasticity , but decreased the ratio of weight at full turgor: dry weight , osmotic potential at turgor loss point and relative water content at turgor loss point .

3土壤干旱增加了植物细胞的束缚水含量、细胞壁弹性模量系数，降低了水分饱和状态下的重量与叶片干重的比率、细胞发生质壁分离时的渗透势以及此时的细胞相对含水量。

Baseline separation of eight kinds of LCFAs (dodecanoic acid, tetradecanoic acid, palmitic acid, oleic acid, stearic acid, eicosanic acid, erudcic acid, behenic acid) was achieved within 2 min with high resolution performance.

建立了利用短的微径色谱柱直接测定食用油中未衍生化长链脂肪酸的快速气相色谱方法。C12~C22脂肪酸在2 min之内实现基线分离，定量标准曲线的相关系数大于0.988，最低检测限（S/N=3）为2.80~9.60 mg/L，回收率为

To establish a MPLC method for the content determination of resveratrol in Polygonum cuspidatum Sieb. Et. Zucc, Analytical column SOURCE 5RPC ST 4.6/150 was used with a mixture of acetonitrile+water (30+70,volume ratio ) as mobile phase ,with a flow rate of 1ml/min and the UV detection wavelength was 306nm, The linear range was 0.6-1.6mg/ml (r=0.9919). The average recovery of prodatin was 103.0%-90.4%(RSD=7.21%). The method is convenient and accurate. Result indicated a reverse phase chromatography media based o n polystyrene/divinyl benzene has excellent resolution for resveratrol in cuspidatum. P rovide theoretical support for process development.

色谱条件采用SOURCE 5RPC ST 4.6/150预装柱，以乙腈/水(体积比30/70)溶液为流动相，流速1ml/min、检测波长为308nm，结果表明，白藜芦醇在0.6～1.6mg/ml的浓度范围内峰面积积分值与浓度的相关系数r=0.9919；所测定的虎杖饮片中白藜芦醇平均含量为0.304％，平均回收率为103.0％～90.4％；实验表明，以聚苯乙烯为基架的反相介质对于虎杖中自藜芦醇具有良好的分辨率，适合其有效成分的检测、分离，对虎杖中白藜芦醇制备的科学研究过渡到工艺开拓有很好的借鉴。

OBJECTIVE To study the specific absorptivity and the formation ratio of ampicillinum natricum and p nitrophenol charge transfer compound.

目的 研究氨苄西林钠与对硝基苯酚形成电荷转移化合物的表观百分吸收系数、形成比及不经分离测定注射用氨氯青霉素钠中氨苄西林钠的含量的方法。

In order to understand these differences on gene transcript level, even to get the genes and their expression related to cell culture, we researched the differences of total mRNA of these tissues by RAPD-PCR, the result showed that the difference between embryo and head of nymphae was much closer than embyo with others, which was accorded to the time order of insect upgrown, and the tissue which is more different from embryo on transcript level ismore diiBcult to be cultured in vitro.

四种组织的培养难易程度和分离出的细胞形态的不同，说明存在着组织表达的差异，为了从转录水平上来认识它们的差异，甚而获得与细胞培养难易相关的基因及其表达产物，本实验还采用了RAPD分析的方法进行了这四种组织：中后期虫卵胚胎、若虫头部组织、成虫的精巢和卵巢的mRNA表达差异研究，结果表明：从发育方向上看，四种组织的表达差异有分化越大差异系数越大的趋势，而在相同条件下则越难培养。

According to the similarity both in aliasing /separation of signal of the ICA model and the embeding/extraction process in the watermarking system, the scrambling image is embeded into the wavelet domain with the linear supraposition.

根据ICA模型中的信号混叠/分离与数字水印嵌入/提取过程之间的相通性，以线性叠加的方式将置乱水印嵌入到图像小波域的某些系数上，检测/提取时通过ICA技术提取水印。3。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。