反点

The surface of conventional engineering part is composed of simple analytical surfaces and four-boundary ruled surface primarily. Therefore a point cloud segmentation method based on those feature surfaces is proposed. Several algorithms to identify the simple analytical surface feature are investigated and discussed. The theory of fitting scattered point to B－Spline and Bézier surfaces is introduced and a fitting method based on four boundary and point set is also discussed. Moreover, anew method to recover the fix-radius rolling ball blend is proposed and discussed in detail.

常规工程零件的外表面中包含了大量的特征曲面，如简单解析曲面和四边直纹面，因此，本文提出基于特征曲面的的点云分割方法，研究几种识别简单解析曲面的算法；研究由点云拟合B－Spline和Bézier曲线的理论基础，总结曲面拟合的几种方法，提出一种反求定半径滚球圆角的方法。

Days early morning 6:35 minutes, we're a family five human follow Pittsburgh in family drive car for setout, to 11:00 left-right arrive the Washington,settle down in the Pennsylvania / 14St St mouth the Marriott Hotels 851# room (that's us at a week before for place an order ), undergo have a lunch and have a little rest after, we're mean go to and live place only a arrow could farthe visitor House center, understand tomorrow the visit receive ticket etc things, the after because times for early mean think to Nearby the make money factory, oppose fascist exhibition place to for look-look, but all because the days visit ticket all already for end then do that's all, follow us mean to Nearby the Korea , Viet-Nam war mark stele go to stroll know clearly stroll, the first number compare near distance the looked to Washington commemorate mark, white house......

1998年4月10日是美国的复活节，4月11日是踰越节，各单位看来都放假两天，我们的NU婿，NU儿专程带领我们到华盛顿特区游览。10日清晨6点35分，我们一家5口由匹兹堡家中驱车出发，至11点左右抵达华盛顿，下塌于宾夕法尼亚街/14街街口的Marriott Hotels 851#房，经午餐及稍事休息后，我们就前往与住地仅一箭之遥的白宫参观接待室，了解明天的参观领票等事宜，之后因时间尚早就想到附近的造币厂，反法西斯展览馆去看看，但均因当天的参观券都已发完而作罢，接着我们就到附近的朝鲜，越南战争纪念碑去逛了逛，第一次较近距离地见到了华盛顿纪念碑，白宫。。。。。。

Figure 4-1 shows resistance spot weld nugget compared to a gas tungsten-arc spot weld.

图表4-1展示反抗性点焊接的地点跟弧形钨点焊接。

From the lifespan of relay point of view, a reliability criterion was provided based on dynamic characteristics of anti-forces. Mathematical model of tolerance design with reliability was set up under usage of "stress-strength interference method", taken some critical dynamic characteristics as identification objects such beginning of contact separation speed, speed of collision and gag bit impact velocity. This model showed that lower values of characteristic parameters center and quantitative descriptively relationship between tolerance and product reliability. Multi-objective optimization model of relay tolerance distribution was completed when some factors such as reliability, processing costs and its feasibility into consideration. Based on Analytic Hierarchy Process to determine weight coefficients of various objectives, and usage of simulated annealing, this study performed optimal reliable tolerance allocation of space electromagnetic relay, and then key technology segments were analyzed, accompanying its course measured by controlling chart.

从继电器电寿命的角度，基于动态吸反力特性的配合提出了继电器的可靠性判别准则；在此基础上以触点分离初速度、触点碰撞速度以及衔铁碰撞速度等关键动态特性为判别对象，采用"应力-强度干涉法"建立了继电器可靠性容差设计数学模型，给出了下位特性参数中心值及其容差与产品可靠度之间的定量描述关系；综合考虑可靠度、加工成本及加工可行性等因素建立了继电器容差分配的多目标优化模型，基于层次分析法确定了各目标的权重系数，并采用模拟退火法实现了航天电磁继电器的可靠性容差最优分配；研究了继电器的关键工艺环节，并通过控制图对其过程能力进行了分析。

A configuration that transition points are reflection symmetric about the midpoint with phase offset in one period is proposed. The intensity of the zero order becomes the function of the phases and can be eliminated.

采用周期内位相突变点镜向对称，前后半周期位相相差结构设计的反对称型达曼光栅，可使其零级衍射光斑强度仅是位相的函数，因此可消除零级谱点。

First of all, set up your eyeline on your left hand side,After confirming the point of reference,Then turn to face the front,Practice focusing your eyes on the targeting point when you turn,Then with the same technique,Set up the reference point on your right,Practice repeatedly,This will help when the camera is set up indirectly to take your turning around.

首先在左手边设定一个看定的点，然后在确认及位置后，回到正面，练习能否在转头时将眼神锁定目标物，同样的方式，设定右边一个看定的点，反覆练习，这样就可以对於不在正面镜头的转头或转身表演有极大的帮助。

Methods K-ras gene point mutation and its style at codon 12 of Patu 8988 cell were detected by using PCR-SSP and sequence analysis.

方法顺序特异引物聚合酶链反应法和基因测序检测Patu8988细胞K-ras点突变形式，根据点突变形式设计并合成硫代反义寡核苷酸（K-ras mutation ASODN）作用Patu 8988，通过噻唑蓝比色法检测细胞生长情况；流式细胞术检测K-ras蛋白表达和细胞凋亡；逆转录-聚合酶链反应检测K-ras mRNA表达水平；以Patu8988细胞建立裸鼠胰腺癌模型观察K-ras mutation ASODN在体内的抗肿瘤效果。

The existing methods of suppressing seabed re- verberation had some deficiencies more or less and so they cannot completely eliminate the reverberation interference.

为此，提出了两步法预测反褶积。该方法分别从共炮点域和共检波点域对海底鸣震进行压制，可以有效地消除鸣震对资料的影响。

Baptism is a ordinance of the New Testament, ordained by Jesus Christ, Mt 28:19 not only for the solemn admission of the party baptised into the visible church, 1Co 12:13 but also to be to him a sign of the covenant of grace, Col 2:12 of his ingrafting into Christ, Ga 3:27 Ro 6:5 of regeneration, Tit 3:5 of remission of sins, Mr 1:4 and of his giving up to God through Jesus Christ, to walk in newness of life: Ro 6:3,4 which ordinance is, by Christ's own appointment, to be continued in his church until the end of the world.

的洗礼，是条例的新约圣经，受戒基督耶稣山， 28：19不仅是庄严的入场党领洗成为有形教会， 1co 12时13分，但也被他的一个迹象盟约宽限期，中校2时12分，他ingrafting到基督，加文3时27滚装6点05分的复兴，山雀3点05分的罪得赦， 1：4和他的放弃上帝透过耶稣基督，走路在新奇性生活：反渗透6：3，4什么条例，是由基督自己的任命，将继续在他的教会，直到世界的末了。

The Process Module point of TDC3000 DCS can be a platform to run more than one CL/APM, used the hardware points and software function point in DCS edited the Squence Control program for intance: Filter Recycle Times Control Program, Common Alarm Control Program, Valve

此控制策略是以Honeywell TDC3000x DCS为平台而编制的控制策略，即使用DCS中提供的此CL 编程语言完成此控制功能。使DCS的功能得到更进一步的扩展。利用DCS的I/O硬件点和内部软件点编制周期性过滤控制程序，公共报警程序，控制阀的状态逻辑控制程序，反冲洗控制程序

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。