When cylinder surface and cone surface penetrate each other,if their axises intersect slantly and are parallel to the frontal projecting plane,there will he special points in the penetrating line.

本文對軸線斜交，且兩軸線平行于某一投影面的圓柱面與圓錐面相貫時韩日性交，相貫線上的特殊點進行探討中国A黄片，從而得出了用輔助球面法不能求出該相貫線上的最右點的結(jié)論。

In the light of all kinds of structural faces and their assembles along tunnel, the place and growth depth of instable cuneiform body in tunnel wall rock could be predicted, then its volume and weight of instable cuneiform body are estimated based on the equator plane projecting method and the solid body ratio geometry method, which offers reliable geologic data for designing corresponding supporting measure.

摘要利用赤平投影法和實體比例幾何法分析隧洞圍巖穩(wěn)定性久久久91精品国产一区不卡，根據(jù)隧洞沿線所遇結(jié)構(gòu)面相互組合形式99精品视频30精品视频，預(yù)測隧洞圍巖不穩(wěn)定楔形體的位置及其發(fā)育深度，從而估算不穩(wěn)定楔形巖塊的體積和重量国产欧美日韩另类VA在线，為設(shè)計相應(yīng)的支護措施提供可靠的地質(zhì)依據(jù)A片在线观看视频免费网址。

You can see rectangular texture piece and triangle face projection to texture coordinates space, set by vertices a, b and c.

你能看到給紋理坐標(biāo)空間的矩形紋理和三角面投影，設(shè)為a日韩欧美国产成人片在线观看、b色五月开心天天、c頂點。

Draw V, H views of the cutting right cylinder.

求圓柱體被截切后的H色哟哟网址在线观看、W面投影一级A片30分钟免费观看。

Draw V,H views of the cutting right cylinder.

求圓柱筒被截切后的H 、W面投影偷窥偷拍综合。

The main jobs of this paper are as followed: 1 The reuse of the frame design technology for aircraft assembly fixtures is researched. a frame line part library is built with the templet driven technology, the reuse of the frame line part come true by the tools for instantiation and instance modification. The design resources are effectively used, some repeating work is cut. 2 Two methods to obtain the assembly feature are proposed: the straight way by the Enumeration method and the indirect way by project features to the assembly plane. All of the assembly features of the frame and the adjustable bearings are obtained by these two methods which makes the frame automatic assembly technology for aircraft assembly fixtures come true. 3 The frame automatic assembly technology aircraft assembly fixtures based on assembly features is researched. A binary tree assembly model is used to express the assembly information of the frame for aircraft assembly fixtures, the automatic assembly between the frame, the aircraft and the adjustable bearing is completed within the three steps: distribute, obtain and evaluate assembly feature. Finally, the efficiency of the frame assembly design is proved. 4The frame interpart modeling technology for aircraft assembly fixtures is researched, the intersection methods are concluded and the arithmetic of the single-cut, double-cut and inter-cut intersection is proposed, the interpart fast modeling of the frame design for aircraft assembly fixture come true. 5Based on the researches mentioned before, a sub-system of frame fast design for aircraft assembly fixture is developed on CATIA. The sub-system is used to design the aircraft assembly fixtures in a large aeronautics corporation and make a good- effect.

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The off-axis reflection system composed of four aspheric mirrors was designed, but the system structure was not so simple and the performance can also be improved, besides, manufacture and test for large aspheric mirrors are difficult; and then the spherical Fresnel mirror which is easier to be manufactured and tested was used to replace the aspheric mirror, the spherical Fresnel mirror has low cost of replication, but this design also can\'t be used in projection lens because it was only feasible in narrow wavebands; Furthermore, the design making use of catadioptric projection lens was accomplished, this design is greatly applied in rear projector because it has merits of both refraction and reflection. But it had difficulties in color aberration correction and had complex structure.

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So,it can use stereographic projection of vector for further theory analysis,such as judging movable block in dam foundation and side slope after determining structure plane which has influence in the stability of project,that can guide the analysis and study of the stability of .

為確定對工程穩(wěn)定性有影響的結(jié)構(gòu)面后中国一级特黄真人高清aa大片，可應(yīng)用全空間赤平投影作進一步的理論分析欧美三级一级69，判斷出壩基和邊坡中的可動塊體，以指導(dǎo)巖體穩(wěn)定性的分析研究和支護設(shè)計工作色中射网址。

We use K to analyze the probability of occurrence of sliding friction circle,and demonstrates it in the structural plane stereographic projection.

用分散性指標(biāo)K表示塊體滑動面的分散性国产国爽视频，由此分析滑動摩擦圓的出現(xiàn)概率，并表示在結(jié)構(gòu)面赤平投影圖上网站视频黄色亚洲。

If the orientation of the existing discontinuity sets could lead to block instability, this assessment may be carried out by means of stereographic technique and kinematic analysis.

如果已有的不連續(xù)結(jié)構(gòu)面產(chǎn)狀組合可能引起巖塊失穩(wěn)一级二级三级毛片，該評價一般采用赤平投影立體分析技術(shù)和動態(tài)分析，使用羅盤是個耗時耗力的工作狼友线观看免费观看。