Proceedings from the theory of geometric optics,the condition adaxial noncoherent imaging of Fizeau opticalsynthetic aperture imaging system is derived to achieve diffracion limited performance over a finite field of view,and the conclusion is that the angular magnification of the individual telescope must be equal to the linear demagnification factor.

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When the underlying error term for tobit model is known to be normally distributed and homoskedasticity, maximum likelihood estimation is consistent and asymptotically normally distributed.

半?yún)?shù)估計(jì)是一種參數(shù)和非參數(shù)估計(jì)的混合，比相應(yīng)的參數(shù)模型更能一致的估計(jì)參數(shù)人人插女人，而且比非參數(shù)模型估計(jì)更精確日韩精品女邻居在线观看视频免费，其優(yōu)點(diǎn)是無需假定誤差項(xiàng)分布，所以它對(duì)非正態(tài)和異方差是穩(wěn)健的91视频网免费观看。

The inelastic scattering angular distributions of discrete levels and double differential cross sections were calculated and analyzed by using the distorted wave Born approximation theory ,the unified Hauser-Feshbach model and the exciton model.

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According to the equation of chromatographic dynamics , we can get the second central moment and the third central moment of elution curve of HPLC under linear nonideal conditions.

從液相色譜過程動(dòng)力學(xué)方程出發(fā)九九热这里只有精彩视频，運(yùn)用電子計(jì)算機(jī)證明了在線性非理想條件下高效液相色譜體系中不同保留值組分在柱末端峰形的分布基本一致的結(jié)論。

Some basic properties of σ- LFSR over F4 are studied, such as nonlinearity, cycle structure distribution of state graph, the largest period and counting problem related. The conclusions are as follows:The coefficient ring of σ-LFSR is isomorphic to the matrix ring over F,. The cycle structure of σ- LFSR is consistent with that of the determinant of the corresponding polynomial matrix if and only if the feedback polynomial of - LFSR does not contain nontrivial factor over F2,. The counting formula of the number of σ- LFSR with inconsistent cycle structure is also showed in that part. The period of σ-LFSR with degree n is maximum if and only if the determinant of the corresponding polynomial matrix is the primitive polynomial with order 2n over F2,.

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The agreements show that the statistical second-order two-scale method is feasible to predict mechanical parameters of inconsistently random composites.

結(jié)果說明統(tǒng)計(jì)的二階雙尺度方法對(duì)于預(yù)測(cè)非一致隨機(jī)分布復(fù)合材料的力學(xué)參數(shù)是有效的。

A detailed investigation was conducted in this paper on the flow asymmetry and its influencing factors over an ogive slender body model, incorporated with surface pressure measurement, skin oil flow pattern visualization, hot wire dynamic signal acquasition and other relevant approaches, in a low turbulence wind tunnel.The obtained test results demonstrate good accordance with those published abroad in the behavior, tendency of the flow asymmetry and the effects due to Reynolds number, incoming turbulence and model geometry etc.

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First, with multi-centered concentralization and regular intersection of azonality and zonality, the villages are not uniformly distributed. Second, basically in agreement with the differences in rainfall, population distribution and regional economy, the number of cancer villages recedes from eastern part to western part in a graded pattern.

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At first,the curve of charge distribution,ionizable state of nonisothermatity sphere,Was obtained by computer to calculate ionized state according to distribution data of temperature and dinsity within Earth. Secondly,the pussibility of microgravitational testonosphere,Within the isothermality sphere,was found by balance between pressure and volumetric forcein Earth's interior.The thickness is 1 000 km or so.Finally,the result come into commom use various geophysical process withi...

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The average percent value of G C (49.3%) was less than that of A T (50.7%), there was a bias of the content of G, T in the third codon; The number of transition G-A and T-C were 22, 15 respectively, which were higher than that of transition A-G and C-T, the number of tranversion C-A, T-G is 2 respectively, and other tranversion patterns didnt occur; the probability of transition was higher than that of tranversion , Ts/Tv = 9.5-19, there was the highest number of transition in the third codon. The gamma parameter a of the lst,nd and 3rd codon positions were 0.00572,0.01237 and 1.05239 respectively, they showed that there was adifferent substitution rate at different codon position. Frequences of synonymous codon usage were relatively biased. The average rates of synonymous and nonsynonymous substitution were 0.0787, 0.0011 respectively, there was a significant difference between dS and dN (Z = 4.713, p.01), and the low ratio( CD = 0.0284 .3) of dN/dS ratio impled that there were selective constraints against the nonsynonymous sites in cyt-b gene, The distribution of nonsynonymous codon substitution pattern related to Grantharm distance indicated that the purified selection at 2nd codon positions was more intensive than that at 1st codon positions. The phylogenetic trees supported the view of the double origin of Chinese goose, which means that domestic Chinese goose was derived from Anser cygnoides and domestic European goose, and Yili was derived from Anser anser.

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sinusoidal：血竇

其組織學(xué)基礎(chǔ)是血竇(sinusoidal)的毛細(xì)血管化(capillarization)、腫瘤新生血管生成(neoangiogenesis)及非配對(duì)動(dòng)脈的增多. CT表現(xiàn)為彌漫分布的低或高密度小結(jié)節(jié),肝外形也呈結(jié)節(jié)樣改變. RN的血供與周圍的肝組織基本一致,