未知

The equilibrium phase diagram of Ti-Si-C ternary system and the estimates of the unknown thermodynamic data of carbides and silicates were used to calculate stabilized chemical potential and to draw the stabilized chemical potential diagram s of Ti-Si-C ternary system.

收集并计算了 Ti－Si－C三元系在 1200℃温度下各组元化合物的热力学数据，利用Ti－Si－C三元系在该温度下的平衡相图以及对碳化物未知热力学数据所做的估算，计算该三元系中各组元化学位并作出的相应的化学位稳定性相图。

Classic rough set theory based on equivalence relation takes complete system as object of study , and divides the region into some non-intersect equivalence class; But, in the real life, because of the errors in data measuring, understanding of data, or the restriction in data collection , it can make the decision-making system incomplete, that is, value of attribution of some objects is unknown, which restrains development of the theory to practical direction.

经典粗糙集理论以完备系统为研究对象，以等价关系为基础，通过等价关系将论域划分为互不相交的等价类；然而，在现实生活中，由于数据测量的误差，对数据理解或获取的限制等原因，使得在知识获取时往往面临的是不完备系统，即可能存在部分对象的一些属性值未知的情况，这就极大地限制了粗糙集理论向实用化方向发展。

Identify the structure of the unknown amino acid from the melting point and equivalent weight of the purified amino acid derivative.

利用已纯化的胺基酸的衍生物的等当量和熔点，可以对未知胺基酸进行结构鉴定

The objective is to design an observer such that estimation error can be completely decoupled from the unknown input.

目标是设计适当的观测器，使得观测误差与作用在系统中的未知输入解耦。

But we have to start from the point we do not know, esp.

但是我们必须一切从未知开始，以此刻的速度。

In most cases, the variance of the noise is unknown, so it needs to be estimated.

在大多数情况下，噪声的方差是未知的，需要对其进行估计。

The advantages of this method are as follows:①It is available even the ultimate state function is unknown.

该方法的优点是：①可用于极限状态函数未知的情况。

Evie climbed 46 places in five years to 15th place last year and Leona tripled in popularity, perhaps after The X Factor winner Leona Lewis.

伊薇在五年中爬升了46名，去年到了第15位。利昂娜的知名度增至三倍，可能和"未知因素"赢家利昂娜路易斯有关。

As showed above, we could draw the conclusion that H3 viruses could cause outbreaks or local epidemics in Shanghai for the immune of population to the new emerging antigenic drift was still unknown though there was strong immune barrier to the previous vaccine strain, H1 viruses also may caused epidemics as the population had a weak immune protection to the previous reference strains A/New Caledonia/20/99-like and part of the recent isolates were distingwishing from them and continued to evolute on the new reference strain, and H5N1 HPAI activities has expanded its geographical range thus increasing the size of the population at risk as the continuing emergence of human cases which give the virus an opportunity to evolve towards a fully transmissible pandemic strain. We should keep eyes on the human cases of avian influenza virus an its variation for the H5 isolates in Shanghai also has the possibility to infect human directly and the infection of H5, H9 viruses had previously occurred in the population especially in those contacting with animals.

综合上述分析结果，我们认为上海地区人群虽然对原有的H3亚型参考病毒株有较高的免疫保护，但H3亚型病毒HA已出现新的抗原漂移，人群现在对新变异株的保护水平尚未知，有可能在未来引起局限性暴发甚至地方性流行；人群对H1亚型流感病毒免疫保护水平低，同时H1亚型流感病毒株部分与原推荐疫苗株抗原性差别较大，并在现推荐疫苗株基础上继续变异，需警惕发生流行的可能性；H5N1亚型高致病性禽流感地域范围扩大，人间病例不断发生，存在演变成大流行株的威胁，上海市H5亚型禽流感病毒株存在跨宿主屏障感染人类的可能性，而且已发现人群尤其禽、畜类动物接触人群中存在H5、H9亚型流感病毒的既往感染，应警惕禽流感病毒的变异和人间病例的发生。

On the condition of exchangeability or unexchangeability of AA and ∑, it is proved that under suitable conditions the linear estimator is better than by Pitman Closeness criterion.

分别在AA和∑的可交换性未知和已知的情形下证明了：在适当条件下于PC准则下优于。

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％。