查询词典 Var

A high-performance liquid chromatographic method for the simultaneous separation and determination of aryltetralin lignans and flavonoids in Podophyllum emodi Wall.var. chinesis Sprague was developed. The separation was performed on a Kromasil-C 18 column by gradient elution with phosphate buffer-methanol (0-13min, 50∶50, 33min, 30∶70) as mobile phase at a flow-rate of 0.8 ml/min, with detection 270nm.

首次建立了桃儿七中苦鬼臼葡萄糖甙、4-去甲基鬼臼脂素、表鬼臼脂素、苦鬼臼脂素、苦鬼臼酯酮、鬼臼脂素、鬼臼酯酮、去氧鬼臼脂素、去氢鬼臼脂素等9种木脂素以及山柰酚、槲皮素等2种黄酮类组分同时分离测定的高效液相方法。

Second, a portfolio selection model under constraints of both investment chance and VaR is established.

第一章介绍了标准的均值—方差模型及"均值—方差有效集"的性质，给出了投资机会约束和VaR约束的定义。

Other controllable devices, such as static var compensators may also be involved in primary voltage control.

其它的控制设备，例如静态无功补偿装置也可以被划分到初级电压控制系统中来。

It was two hours, owing to sundry wrong turnings, ere she found herself on a summit commanding the long-sought-for vale, the Valley of the Great Dairies, the valley in which milk and butter grew to rankness, and were produced more profusely, if less delicately, than at her home - the verdant plain so well watered by the river Var or Froom.

由于拐弯时多走了一些冤枉路，她走了两个小时才走到一个山顶上，望见她渴望已久的沟谷：大奶牛场的沟谷。在那个沟谷里，牛奶和黄油的增长十分迅速，虽然不如她家里的牛奶和黄油味美，但它们的生产要远比瓦尔河或佛卢姆河所灌溉的那块翠绿草原上生产的牛奶和黄油丰富。

It was two hours, owing to sundry wrong turnings, ere she found herself on a summit commanding the long-sought-for vale, the Valley of the Great Dairies, the valley in which milk butter grew to rankness, were produced more profusely, if less delicately, than at her home - the verdant plain so well watered by the river Var or Froom.

由于 www.ddd§tt.com 拐弯时多走了一些8 tt t8.com 冤枉路，她走了两个小时才走到一个山顶上，望见她渴望已久的沟谷：大奶牛场的沟谷。在那个沟谷里，牛奶和黄油的增长十分迅速，虽然不如她家里的牛奶和黄油味美，但它们 www.Dddtt.com 的生产要远比瓦尔河或佛卢姆河所灌溉的那块翠绿草原上生产的牛奶和黄油丰富。

It calculates the active power and reactive power of the net side of the rectification system on-line, which based on the three-phase circuit instantaneous reactive power theory. To provide fast and accurate real-time measurements of active and reactive for new type static var compensators, this paper designs a optimization digital low-pass filter with the approach by combining the Butterworth filters with mean filter.

基于改进的瞬时无功功率理论，在线计算整流系统网侧有功和无功功率，将Butterworth滤波器和均值滤波器相结合，优化设计高性能的数字低通滤波器，为新型SVC提供快速而准确的有功与无功在线测量值。

According to the reactive characteristics of the distributed generation and the shortcomings of the compensation system for static var compensator, based on the instantanous reactive theory and symmetrical component method, a real-time method for calculating the value of reactive power of the system is presented.

根据分布式发电的无功特点及现在SVC补偿系统的不足，利用瞬时无功理论和对称分量法，提出一种实时求取电力系统无功功率的方法。

Major results were summarized as follows:(1) A total of 58 tree species from 53 genera in 36 families among which 8 species were Rosaceae, 5 species were Liliaceae, 5 species were Eriaceae, 3 species were Ranunculaceae, 3 species were Compositae, 2 species were Cupressaceae, 2 species were Caprifoliaceae, 2 species were Umblliferae, and other 28 tree species were only one receptively. These were recorded in the 8 plots of the A. georgei var. smithii forest;(2) Number of families, genera, species and Margalef index correlated negatively with altitude (P.05), with a peak at 3600 m.(3) Shannon-Wiener index correlated negatively with altitude (P.01), and maintained stable at the altitudes between 3700~4100 m, evenness with altitudes, however, this trend was insignificant.(4) Jaccard index increased sharply with increasing altitude at the altitudes between 3600~4100 m, and was lower between different vegetation types at the altitudes between 4100~4200. Cody index β(subscript c decreased with an increasing altitude, but there were 2 troughs between 4000~4100 m and 4200~4300 m.(5) Maximum tree height H(subscript max and HH(subscript max=37 mcorrelated negatively with altitude (P.05); but basal area and BA BA(subscript max=5.3m^2 correlated with altitudes, however, this trend was insignificant.

结果表明：(1)在调查的8个急尖长苞冷杉林样地内共有植物58种，分属于36科53属，其中植物较多的科有蔷薇科8种、百合科5种、杜鹃花科5种、毛茛科3种、菊科3种、柏科2种、忍冬科2种、伞形科2种，其余的28科各只有1个种；(2)物种科、属、种数、Margalef指数D(下标 M与海拔存在显著的负相关性(P.05)，在分布急尖长苞冷杉最低海拔3600m处出现物种丰富度的最大值；(3)多样性指数与海拔之间有极显著的负相关性(P.01)，并且在3700~4100m之间多样性指数保持稳定；均匀度指数与海拔梯度之间存在负相关性，但不显著；(4)Jaccard指数C(下标 j在海拔3600~4100m随海拔的升高而升高，在生境过渡带的4100~4200m之间Jaccard指数C(下标 j较低；Cody指数β(下标 c随海拔的升高呈下降的趋势，但在4000~4100m和4200~4300m 海拔区间出现2个低谷；(5)最大树高H(下标 max和最大胸径DBH(下标 max与海拔之间存在显著负相关性(P.05)；胸高断面积之和和立木密度与海拔之间存在负相关性，但不显著。

Research on reducing flicker caused by arc furnace with advanced static var generator.

用新型静止无功发生器抑制由电弧炉引起的闪变之研究。

Based on the research of current situation of risk management of capital allocation for commercial banks both at home and abroad at present, this paper put forward a unified VaR theory framework and model by using reserve for bad debts, capital at risk and deposit insurance system. The reserve for bad debts, capital at risk and deposit insurance system are used to execute grading risk prevention and to develop a comprehensive quantification method that executing risk management to commercial banks.

因此，在对目前国内外商业银行资本配置风险管理现状进行研究的基础上，本文提出了包含损失准备金、风险资本和存款保险的商业银行资本配置风险管理的统一的VaR理论框架和模型，用损失准备金、风险资本、存款保险制度来分级防范风险，并在此理论框架和模型下发展出完整的从资本配置的角度对商业银行进行风险管理的量化方法。

The father that if work,mad father, love annoys, disposition is too indrawn the be short ofing that the father of Mu Ne, resign oneself to adversity causes father easily to love is broken; Communicate time effectively between father and son, Mu Zizhi to be less than a hour on average to wait a moment every week, it is the cause that causes the child to become addiction.

如工作狂的父亲、爱愤怒的父亲、性格过于内向木讷、逆来顺受的父亲都易造成父爱的缺失；父子、母子之间的有效沟通时间每周平均小于一小时等等，都是造成孩子成瘾的原因。

These are vandal proof and they come with a locking mechanism.

这是野蛮的证据，他们来到了锁机制。