Based on the Seidel sums formulae of thin lens, four types of NIM thin lenses free from partial primary aberrations are designed with specific parameters and given redundant aberration coefficients.

通過對單塊負折射率介質(zhì)薄透鏡的像差特性分析另类综合80P，我們提出了四種只有利用到負折射率介質(zhì)才具備的可消除部分初級像差的單塊薄透鏡系統(tǒng)a一级毛片久久免费，并給出了相關(guān)的系統(tǒng)結(jié)構(gòu)參數(shù)和冗余的初級像差表達式亚洲一区二区三区偷拍。

The skin on one side of the drum is thick made from goatskin; while on the other is thinner made from sheepskin. The thick skin side is hit with a tokmak and the thin skin side with a light wooden stick, to produce both a deep bass sound and a thin treble sound.

雙面鼓的一面較厚男女激情猛烈无遮挡在线观看，以山羊皮制成；一面較薄欧美黄色网站一区，以綿羊皮制成盗摄综合网；厚的一面以木槌打擊，薄的一面用輕細的木條打擊禁止看黄片，形成低音及高音的不同節(jié)奏效果。

In the past, there exists difficulty for calculating nearly singular integrals arising from boundary element analysis of the problems of thin body. However, by now, the difficulty of nearly singular integrals has been resolved by analytical integral algorithm, which has been put into uses in analyzing the conventional structures and thin body structures in the potential problems.

過去邊界元法求解薄體結(jié)構(gòu)存在著幾乎奇異積分的困難a片av在线播放，目前幾乎奇異積分問題已得到成功解決一级艳片真人视频观看，解析積分算法也已成功應用于分析二維位勢問題常規(guī)結(jié)構(gòu)和薄體結(jié)構(gòu)。

Farmer's reducer: A solution for reducing the density of developed negatives, invented by Howard Farmer and containing principally potassium ferricyanide and sodium thiosulfate.

法梅氏減落薄業(yè)：侯活法梅發(fā)明的減薄液操操操射射射干干干，它是一種能把顯影底片的密度減弱的液體禁止18岁以下的看A片。主要成分是鐵青化鉀和硫代硫酸鈉。

Farmer's reducer: A solution for reducing the density of developed negatives, invent ed by Howard Farmer and containing principally potassium ferricyanide and sodium thiosulfate.

法梅氏減落薄業(yè)：侯活法梅發(fā)明的減薄液韩国产三级三级香港三级日本三级，它是一種能把顯影底片的密度減弱的液體国产视频免费视频在线。主要成分是鐵青化鉀和硫代硫酸鈉。

Later the formula for the transmission coefficient in the centre of the thin spherical shell is achieved.

在平均邊界條件的基礎(chǔ)上国产麻豆剧传媒一区，導出了旋轉(zhuǎn)球形薄殼體屏蔽邊值問題的解免费费黄色真人视频，之后得到了球形薄殼體中心傳輸系數(shù)的公式，最后應用FORTRAN語言編程上機計算AV不卡在线永久免费观看，找到了磁場振蕩頻率五月天婷婷网亚洲综合在线、旋轉(zhuǎn)速度與傳輸系數(shù)的關(guān)系等重要屏蔽特性。

This species was found to bear similar diagnostic characteristics with Sinibotia, such as no scales on the cheek, a pair of button-like papillae on the chin region, and the diagnostic characteristics of Leptobotia as well, such as a simple suborbital spine.

進一步對斑紋薄鰍進行形態(tài)學特征檢視激激激激激激情，發(fā)現(xiàn)該物種具有頰部裸露無鱗国产国产成人久久精品、頦部具一對紐狀突起等中華沙鰍屬魚類的特征，但又具有眼下刺簡單不分叉的薄鰍屬魚類的特征激情乱伦色图。

In the mid-late development stages for oilfields,the key for tapping potential residual oil is the accurate description of the distribution of narrow-thin-scattered sandbodies and the heterogeneity of reservoirs,as well as the accurate identification and interpretation of low-level faults.

大慶葡萄花油田和敖包塔油田葡Ⅰ組油層以窄薄砂體為主国产高清wwwwwwwww色视频，且呈條帶狀、斷續(xù)條帶狀或零星分布，在油田進入開發(fā)中后期時洲在线综合视频，對"窄欧美老年人性爱视频、薄、散"砂體的展布和儲層的非均質(zhì)性的準確描述成熟丰满熟妇高潮XXⅩ，對低級序斷層的準確識別和解釋久国产在线，是剩余油挖潛的關(guān)鍵。

The theory of accretion disks are important for many astrophysical phenomena, including Quasars, active galatic nucleic, X-ray binary stars, and young stellar objects. The most important branch of accretion djsk theory is the stability properties of djsks. It is widely considered that the luminosity variations of various astronomical objects are associated with the instability of accretion disk. The viscosity plays an important role in the accretion disk theory, and magnetic field exists commonly in astronomical phenomena. A more realistic analysis of the stabihty of the accretion disk should include both the radjal and azimuthal perturbations because of the strong shear of viscous flow.In this paper, according to the luminosity Variations of Various astronomical objects, we study the radial-azimuthal instability of an isothermal with magnetic field. We find that the radial and azimuthal fields B〓,B〓 are mainly responsible for enhancing the instability of the magneto-acoustic modes and non-axisymmetric modes,and that pulsational oscillations are larger in the radial than in the Z direction. The model may be useful in explaining the periodic light variation of FU orionis and. T Tauri stars.

在許多天體物理現(xiàn)象中国产在线A级在线视频，例如活動星系核jiZZjiZZjiZZjiZZ免费看，X-射線雙星和年青的恒星理論中，吸積盤理論起著重要的作用9999视频免费视频，而吸積盤理論中的一個重要分支是吸積盤的不穩(wěn)定性理論美女裸体污污18禁免费APP，普遍認為活動天體的周期，準周期光變現(xiàn)象與吸積盤的不穩(wěn)定性有關(guān)免费视频高清日韩精品视频在线播放，在吸積盤理論中污污在线视频导航，粘滯起著重要的作用，而磁場是天體物理中普遍存在的現(xiàn)象欧美性生活17-18，對于幾何薄吸積盤不穩(wěn)定性分析黄片视频在线观看2021，由于強剪切流的緣故，應該包括徑向和環(huán)向擾動兩個方面艹视频免费，本文結(jié)合天體物理中的各種周期无码A片ssss，準周期光變現(xiàn)象，研究了含磁場的等溫薄吸積盤的徑向-環(huán)向振蕩不穩(wěn)定性国产深夜福利嘿咻嘿咻视频，結(jié)果表明：磁場的徑向和環(huán)向分量對磁聲模和非軸對稱模的不穩(wěn)定性的增加起著主要的作用一级黄色视频性交，且徑向振蕩大于軸向振蕩，所得結(jié)果有利于解釋FU Orionis和T Tauri Stars的周期光變現(xiàn)象国产草草影院在线观看欧美。

We set the thin width to be 3 pixels, and the thick width to be 3 times the thin width (i.e 9 pixels).

我們建立了一個薄的寬度為3像素啊片免费看，濃烈的寬度為3倍的薄寬（即9像素）。