时间价值

By using the signal flow graphs of the integrators in Z domain, four kinds of SI integrator circuits are given. 4. The design method of SI biquadratic filters is proposed.

研究了四种离散时间积分器的特性，并与连续时间积分器的特性进行了比较，得到一些对开关电容和开关电流滤波器的设计有价值的结果。

The specialties of time in modernity and the time-hating, the modern theme of leaving home and going home, taking Ba Jing as a case study; 5. The research on the space of modernity and the space-hating, taking Yu Dafu's dual spaces, that is, the space of degenerating and the space of reclusion as the subjects to analyze.

这一问题域的展开遵循如下次序：一，现代精神中的怨恨之发生；二，启蒙伦理的怨恨背景以及现代性怨恨对古典价值秩序的颠覆；三，父与子的主题，统治与解放的辩证法；四，现代性时间的特点与时间怨恨，离家与回家的现代主题，以巴金为个案；五，对现代性空间以及空间怨恨的分析，以郁达夫的二重空间，沉沦与隐逸的空间为分析模型。

In the integral formula of Fourier transforms of option pricing formula,by using residues theorem two integrations were simplified into a single numerical integration which has a faster rate of decay.

在期权定价公式的傅立叶变换积分公式中，运用留数定理将公式中的两个积分式子化简成一个被积函数衰减较快的积分函数式，从理论上提高了计算效率，缩短了计算时间，为投资者快速计算期权价值节约了时间。

Objective To evaluate the efficacy of stapled hemorrhoidectomy in treatment of third or fourth degree hemorrhoids.Methods A total of 24 patients with prolapsed irreducible hemorrhoids were performed stapled hemorrhoidectomy.Benefits and postoperative complication were assessed.

目的 探讨经肛门吻合器痔上黏膜环状切除术的临床应用和价值方法对24例3～4期痔行经肛门吻合器痔上黏膜环状切除术，分析手术过程与术后并发症的相关性，分析术后留院时间，恢复正常工作的时间及治疗费用。

Results All the 6 patients with PAP presented ground-glass opacities with well-defined margins on MSCT'creating "geographic" pattern'reflected the effusion of proteinaceous material within the alveoli in PAP.Thickened interlobular septa'looking as the "crazy-paving"'was found in 4 cases in high-resolution CT'correspondence with edema and lymphocyte exudation in interlobular septa in pathological findings.

多层CT的问世，使单次屏气时间内完成高质量的全肺薄层扫描成为现实，极大提高了图像的时间和空间分辨率，胸部高分辨率CT还能清晰显示次级肺小叶为单位的肺内细微结构，极大提高了CT在肺部疾病诊断中的应用价值。

The reason is that the adsorption of the low-boiling component will be so intensive that the surface layer of the ROS will consist almost entirely of molecules of isobutane.

那时间大于花费的时间显着建立平衡压力在实验性细胞[38]。以油的高浓度在ROS的血丝的平衡价值恒定为ROS能在4-5天之内达到(参见图3a)。

The Judean businessman knows the value of time very much, thinking that time is also a merchandise.

犹太商人很懂得时间的价值，认为时间也是商品。

The results showed that the virus isolation and identification could generate considerably reliable results but the procedure was complicated and costed long time; microtomy fluorescent antibody detection was fast, but the specificity was low and needed to exclude the false positive from the results. Sandwich ELISA detection combined the merits of the former two methods, but it generated the false negative results when the samples were in bad preservation. Compared with the others, RT-PCR was fast, high sensitive and especially useful for detecting the CSFV directly from the samples. The specificity could be raised by using the nested-PCR to detect the CSFV from the simples, especially when the simples were in bad preservation.

结果显示，病毒分离鉴定法准确性较高，诊断比较容易，但存在试验步骤繁琐，所需时间长的缺点；荧光抗体检测法所需时间较短，但需要经验比较丰富人员来判定结果，且存在假阳性结果，特异性比较差；RT-PCR检测法具有快速、敏感等优点，特别是样品保存不理想时更有价值，利用套式PCR可以提高检测的特异性；夹心ELISA检测法具有快速、敏感等优点，但在样品保存不理想时会出现假阴性结果。

" Life being very short, and the quiet hour of it few; we ought to waste none of them in reading valueless Books -- John Ruskin"

人生十分短促，宁静的时间又不多；我们不应该浪费宝贵的时间去读毫无价值的书--约翰·拉斯金

Renaissance poets lay emphasis on the destructive power of time, for only by destroying spurious values can time fulfill its function of unveiling truth.

文艺复兴时期诗人强调时间的摧毁力量，因为只有摧毁虚假的价值，时间才能完成其揭示真理的功能。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。