方形的

In part two, the optical spatiotemporal pattern in ring optic cavity is investigated. Using delay feedback with spatial perturbation method, the system shows roll, square, hexagon, homocentric circle,"honeycomb"and"snowflower" pattern with different spatial perturbation functions. Different patterns can be coexist and compete each other with the same perturbation function, which is the new character of this optical system with delay feedback.

第二部分，利用延时反馈的空间微扰方法研究了环形腔中二能级介质的光学时空斑图的控制，在不同的微扰函数作用下，出现了滚筒状、四方形、六角形、蜂窝状、同心圆以及&雪花&状等不同的斑图，并且在相同的微扰函数下出现了不同斑图之间的竞争，这种竞争是我们发现的这一具有空间微扰的延时反馈非线性光学系统光学斑图的新特征。

It was a big, squarish frame house that had once been white, decorated with cupolas and spires and scrolled balconies in the heavily lightsome style of the seventies, set on what had once been our most select street. But garages and cotton gins had encroached and obliterated even the august names of that neighborhood; only Miss Emily's house was left, lifting its stubborn and coquettish decay above the cotton wagons and the gasoline pumps--an eyesore among eyesores. And now Miss Emily had gone to join the representatives of those august names where they lay in the cedar-bemused cemetery among the ranked and anonymous graves of Union and Confederate soldiers who fell at the battle of Jefferson

这是一个宽敞的方形屋宇，香气袭人，以前曾一度被刷成白色，另外配以炮塔和尖屋顶，以及涡旋装饰的阳台，使它更具有七十年代的浮华风格，它坐落在镇上最讲究的街道上，但是车库和轧棉机几乎吞噬了这片尊贵的地区，只有Emily小姐的房子留了下来，在丑陋的马车和发动机的喧嚣中，也留下了它顽固而迷人的奢侈，而现在，Emily小姐已经归入了那些显贵的名单，他们葬在掩映于沉默雪松的公墓里，在Jefferson战役中牺牲的有名和无名的士兵们也一并葬在那儿。

humans history of science development as it were a history of learning from other being.from bat to echo locator,from leaves array to sydney opera house,all of these outcome are coming from creature.bees build hexagonal honeycomb to use space as fully as possible ,which is very scientific.ants can build complex hole to feed babies,transport and store 美容 in small and limited space.by researching honeycomb and ant city,the city plot sign can make use of 食品 conclusion.

人类的科技发展史可以说是一部向其他物种不断学习模拟的历史。从蝙蝠到回声定位仪、从鸟类到波音747、从树叶的排列到悉尼歌剧院，无疑不是向生物学习的结果。蜂巢是通过六边形的蜂房来实现了对空间的最大利用，毫不浪费（因为圆形总是会有空隙，而方形又不节省材料，所以介于它们之间的形状充分综合了二者的优势）。蚂蚁穴是庞大的蚂蚁群在极小的空间中构筑的复杂巢穴，能满足其哺育后代，运输贮存食物等功能，并且是井井有条。

Full on-chip hardware support of semaphore signaling between ports Fully asynchronous operation from either port Separate byte controls for multiplexed bus and bus matching compatibility Supports JTAG features compliant to IEEE 1149.1 LVTTL-compatible, single 3.3V (150mV) power supply for core LVTTL-compatible, selectable 3.3V (150mV)/2.5V (100mV) power supply for I/Os and control signals on each port Available in 208-pin Plastic Quad Flatpack, 208-ball fine pitch Ball Grid Array and 256-ball Ball Grid Array Industrial temperature range (C40C to +85C) is available for selected speeds

全片的旗语信号港口之间无论从港口独立的多路复用总线和控制总线字节完全支持异步操作的硬件配套兼容性支持JTAG功能符合IEEE 1149.1的LVTTL兼容，（150mV的）电源为3.3V单核心的LVTTL，兼容，（150mV的）/ 2.5V的选择3.3（100mV的）电源供应为我/ O和每个端口208引脚塑料方形扁平，208球细间距球栅阵列和256球的球栅阵列控制信号工业温度范围（C40C至+85 C）是选定的速度可

Shuangzhu mechanical vehicle lift, which includes two box-shaped Jusheng pillar, two vertical sliding in the box-shaped piece of Jusheng-piece aircraft, two up and two track-holding arm, their identity is in Jusheng pillar box-shaped structure in part by the end of Liang-bed or carpenter's square or rectangle gear boxes and gear boxes on both sides of a square-short margin upward extension of the upper beam connecting a pillar overall; Jusheng pillar box is described below rectangle gear boxes installed electric motors is one of the driving boxes; and the piece-by-two parallel fixed in its orbit above the occasional arm-supporting, through the Hua Tao Kong spaces interlinked.

毕业论文字数：36721 页数：95 带图纸任务书说明书）摘要：双柱机械式汽车举升机，它包括两个框形举升柱，两个垂直滑动在该框形举升柱上的升降滑架，两个托臂和两个轨道式托板，其特征在于所述框形举升柱是由结构在下部的底板升底梁升矩形齿轮箱及矩齿轮箱两侧短边向上延伸的方形导柱连接上部的横梁构成的整体；所述框形举升柱下面的矩形齿轮箱其中一个是安装电动机的驱动箱；而所述升降滑架是由两个平行固定在其上的托臂穿过所述轨道式托板上滑套的孔位相互连接。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。