衰减

In the telecom devices and digital networks, it can guarantee the digital or analogy signal which is transformed has low attenuation and unconspicuous distortion. All of these requests determine the important status of transmission line transformers in modern telecommunication.

包括在电信设备和数字网络中，要求使传输的模拟或数字信号有低的衰减，以及无明显的失真，这些都决定了传输线变压器在现代通信中的重要地位。

For a target of any thinkness, the undeflected flux diminishes exponentially with thickness.

对具有任意厚度的靶，无偏折的通量随厚度扫指数规律而衰减。

For a target of any thinkness, the undeflected flux diminishes exponentially with thickness

对具有任意厚度的靶，无偏折的通量随厚度呈指数规律而衰减。

I.! y P,{7 v: R; O0 D INTRODUCTIONIn most of the previous studies like [1-3], the effect of SRS in DWDM fiber opticsystems has been treated under various assumptions like undepleted pump approximation, wavelength independent fiber loss coefficient, triangular approximation of Raman gainprofile, negligible loss of energy whenever a short wavelength photon is transformed into a long wavelength photon (i.e., l i / l k ~ 1), equal power loading in all the wavelength channels and equal channel spacing.

P _ W/ I 在以往的绝大多数研究中，如[1-3]，人们都认为， SRS 在 DWDM 光纤系统中的影响是在诸多假设，如未衰减泵近似值，波长依赖光纤损耗系数，喇曼增益表的三角近似值，当短波光子被转变为长波光子时(i.e。， l i / l k ~ 1可忽略不计的能量损耗，各波长通道均等的动力负载以及均等的信道的频率间隔。

ANP and CX43 began to express at 2nd week after induction and increased gradually,about 60% of the resulting myogenic cells were positive at 4th week after induction ,they were negative for uninduced cells.hMSCs'surface antigen profiles obtained by Flow Cytometry were negative for CD31\CD34\CD45 before and after induction,but CD90 expressed higher after induction while was weak positive before induction(P.05). Apotosis index was correlated with the cultural time after induction,The apoptosis rate of induced hMSCs was remarkably higher than control group(P.01),and the variation between groups was notable(P.05),the cell cycle analysis showed that the percentages of G_0/G_1phases were reduced significantly after induction. The expresstion levels ofβ-MHC and CTNT mRNA were undetectable before induction,began to increase at 1st、4th week after induction,reached the peak at 6th week and decreased after that,the expression of Bcl-2 and Bax mRNA varied regularly after treated with 5-azacytidine. hMSCs'resting membrane potential、range and rate of depolarization were heightened gradually after being induced.

结果：hMSCs诱导前为纺锤形，诱导后第2天部分细胞即开始发生形变，呈球形或短棒状，1周后胞浆中颗粒增多，约20～30%细胞边缘呈毛刷样变化；hMSCs表面抗原CD31、CD34、CD45在诱导前后差异无统计学意义，CD90未诱导时表达呈弱阳性，诱导后明显增高(P.05)；ANP和CX43在诱导前无表达，诱导后第2周开始表达且表达随时间逐渐增强，但CX43在诱导后第5周表达量开始降低。hMSCs诱导后凋亡指数随诱导后培养时间增加，低浓度诱导组低于标准浓度诱导组，组间差异有统计学意义(P.05)，G_0/G_1期细胞比例诱导后较对照组显著减少(P.05)；β-MHC和CTNT基因分别在诱导后第1周和第4周时表达开始增强，在第6周时均达到高峰，第8周时表达开始衰减，Bcl-2、Bax基因表达呈时间依赖性变化，hMSCs经诱导后随心肌样细胞特征的表达膜静息电位、去极化幅值和去极化速率逐渐增高。

The Tc of specimens was increased with proton irradiation fluence increment. The largest increment of Tc is 7K. One week after irradiation, the Tc was lower than the unirradiated value.

在30K下，20MeV质子辐照荧光靶产生的γ射线辐照Bi系超导样品，在线测量各样品Tc的同时，测量现场的γ射线强度，发现Tc的增加值随着γ射线强度的衰减而逐渐减少。

By the contrast of the decay characteristics between the unsensitized sample and the sensitized samples, the optimum sensitizing-time on this experiment condition is 60 min.

通过未增感样品与增感样品的衰减曲线对比，得到了在此实验条件下的最佳增感时间为60min。

The experiment is done based on a glass cell and all the results are quite in agreement with the theory. The decay process of the background vacuum pressure caused by the untrapped cesium atoms after shutting off the desorption light is well explained quantitatively.

通过实验获得了不同光强和照射时间下关闭解吸附光后磁光阱中铯原子的衰减过程，理论模型定量地描述了背景铯原子造成压强的变化及其对最终平衡态下真空度的影响。

A series of experiments were conducted to study absorption, biodegradation and volatilization in natural attenuation of diesel pollution in sand layer of vadose zone quantitatively.

通过实验定量研究了柴油污染包气带砂层自然衰减过程中吸附、生物和挥发作用。

According to the analysis of relations between optical power,center wavelength,sensing fiber Verdet constant,and Fiber Optic Current Transformerscale factor,it was demonstrated that the center wavelength excursion generated by power attenuation of SLD was the prime reason of FOCT scale factor error.

通过分析光源功率、中心波长、传感光纤Verdet常量，以及闭环光纤电流互感器变比之间的关系，结合测试数据，证明了中心波长漂移是光源功率衰减引起闭环互感器变比变化的主要原因。

What are your goals and strategies for growth?

你的成长目标和策略是什么？

And unto the angel of the church in Sardis write; These things saith he that hath the seven irits of God, and the seven star I know thy works, that thou hast a name that thou livest, and art dead.

3：1 你要写信给撒狄教会的使者，说，那有神的七灵和七星的，说，我知道你的行为，按名你是活的，其实是死的。