伸缩

We study a polygon representation composed by the vertex angles and ratios of adjacent edge lengths, which is invariant to geometric transformations such as translation, rotation and scaling. The polygon is globally represented by a scale-invariant intrinsic matrix.

提出了由顶点转角和相邻边长比例构成的多边形伸缩内在量表示的方法，多边形从整体上由一个伸缩内在矩阵来表示，该表示方法具有平移、旋转和伸缩等几何不变性。

Research the distributive law of shear-lag of curved box girder jointless bridges by variation of load distribution,and compare with those in joints bridges.provide the basis about the account of account of shear-lag of jointless bridges.

分析无伸缩缝曲线箱梁桥剪力滞系数沿桥跨的变化情况并与有伸缩缝曲线桥进行比较，为无伸缩缝曲线箱梁桥剪力滞系数的计算方法提供理论依据。

The present paper design content is the expandable belt feeding engine, is transmits the force of traction through between the transmission drum and adhesive tape's friction force, concurrently makes the hauling organization and the load bearing organization one kind by the adhesive tape for the material equipment, expands and contracts the arm rear part establishment to have the expandable hydraulic prop, causes the complete machine length nimble elongation or the reduction, between the supporting roller the included angle increases to causes the belt fastener inclination angle to be possible to amount to 25 degrees, has for estimates in a big way, the transportation is steady, the service is convenient, the area slightly and so on characteristics, brings conveniently to the load, can the widespread application in each kind of bulk collection and distribution center production scene.

本论文设计内容是可伸缩带式给料机，是通过传动滚筒与胶带之间的摩擦力来传递牵引力，以胶带兼作牵引机构和承载机构的一种给料设备，伸缩臂尾部设置有可伸缩的液压支柱，使整机长度灵活的伸长或缩短，托辊之间夹角增大可使皮带机倾角可达到25度，具有给料量大，运输平稳，维修方便，可多点卸料，占地面积小等特点，给装车带来方便，能广泛的应用于各种散料集散地的生产现场。

The mechanisms in daily life, including the scissors-style crank-linked expansion and contraction gate, an expanding and contracting clothes rack, a sawhorse work table, etc., feature linear expansion and contraction.

日常生活中我们见到的剪式连杆结构的伸缩门、伸缩衣架和剪式升降工作台等可以实现直线伸缩，按此原理将剪式连杆封闭咸圆形，则可实现"圆"的伸缩；而将多个"圆"通过交叉组合成球形，从而实现"球"的伸缩。

Paper telescopic deformation is a common phenomenon, serious there should be a single color mechanism cards and membership cards, could not be made in the four-colour printing machine will also appear in the same ratio in the same turn elongation of behavior, or drag-and-shoot bodysites radiofrequent slice "" and swing angle, resulting in a surface of overproof or the press because of the expansion and are not allowed to finish, or as printed on the paper appear expansion on the issue, for processes, a lot of trouble.

伸缩变形。纸张的伸缩变形是多见本体，惨重时，拔取单色机制卡和会员卡制作无法套印，在四色机上也会呈现一色比一色挨次缩短的本体，或拖梢部位呈扇面&甩角&，变成套准超标或侧背面因伸缩而套禁绝，或印完的纸张呈现伸缩纷歧，给后加工工序带来好多便当。

A handle is arranged in the middle of the frame, and the handle is connected with a big bevel wheel through a small bevel wheel.

它包括框架、左伸缩臂、右伸缩臂，所述框架为中间空形，所述左伸缩臂和右伸缩臂的内侧为管形，外侧为蝶形，蝶形面上设有二排孔，所述框架两端分别嵌套左伸缩臂内侧和右伸缩臂内侧，左伸缩臂内顶端设置有左螺母，右伸缩臂内顶端设置有右螺母，所述的框架中部设有手柄，手柄通过小斜齿轮连接大斜齿轮，大斜齿轮连接有螺杆，所述螺杆有以中间为对向的螺纹，螺杆的两端分别与左螺母和右螺母相连接。

Almond,walnut,peanut and almond are abundant in protein and lipid with CH stretching vibration nearby 2 914 cm-1,2 847 cm-1and C=O stretching vibration nearby 1 742 cm-1 in their infrared spectrum;while wolfberry fruit, red date,raisin and fig are abundant in pdysaccharide and protein conte.

巴旦木、核桃仁、花生仁、带壳杏仁富含蛋白质和脂类物质，红外图谱显示出在2 914，2 847cm-1附近的CH伸缩振动和1 742 cm-1附近的C=O伸缩振动；枸杞子、红枣、葡萄干和无花果干富含多糖、蛋白类物质，其红外图谱显示出在3 370 cm-1附近的OH变形振动、NH伸缩振动和2 920 cm-1附近的CH伸缩振动。

Effects of microorganism starter culture on the lipid of dry-cured fermented duck;2. Almond,walnut,peanut and almond are abundant in protein and lipid with CH stretching vibration nearby 2 914 cm-1,2 847 cm-1and C=O stretching vibration nearby 1 742 cm-1 in their infrared spectrum;while wolfberry fruit, red date,raisin and fig are abundant in pdysaccharide and protein conte.

巴旦木、核桃仁、花生仁、带壳杏仁富含蛋白质和脂类物质，红外图谱显示出在2 914，2 847cm-1附近的CH伸缩振动和1 742 cm-1附近的C=O伸缩振动；枸杞子、红枣、葡萄干和无花果干富含多糖、蛋白类物质，其红外图谱显示出在3 370 cm-1附近的OH变形振动、NH伸缩振动和2 920 cm-1附近的CH伸缩振动。

The invention includes a bridge, a bridge traveling mechanism, a crane trolley, a telescopic boom and a telescopic traveling mechanism; wherein the bridge traveling mechanism drives the bridge to travel longitudinally along the track on elevated beams on the two sides; the crane trolley travels laterally along the track on the bridge; the telescopic boom is arranged between the crane trolley and the bridge, the crane trolley travels laterally along the track on the telescopic boom; and the telescopic traveling mechanism drives the telescopic boom to travel laterally along the track on the bridge.

本发明包括桥架、桥架运行机构、起重小车、伸缩臂和伸缩运行机构；其中，所述桥架运行机构驱动所述桥架沿两侧的高架横梁上的轨道纵向运行；所述起重小车沿所述桥架上的轨道横向运行；所述伸缩臂设置在所述起重小车和所述桥架之间，所述起重小车沿所述伸缩臂上的轨道横向运行；所述伸缩运行机构驱动所述伸缩臂沿所述桥架上的轨道横向运行。

There are more than 3000 different kinds of valves available. The products series cover hydraulic turbine input liquid control butterfly valve, soft sealing gate valve, clamp butterfly valve; flange valve, expansion butterfly valve, bi-direction metal seal ing butterfly valve, tri-eccentric metal sealing butterfly valve, eccentric semi - sphere ball valve, eccentric dual -semi - sphere ball valve, and sluice gate, hydraulic slow-closing c heck v alve , v ent valve, adjusting valve, body eccentric valve, dual eccentric butterfly valve, varied eccentric butterfly valve, Check valve with little-resistance, slow-closing, noise-eliminating , butterfly valve with mid temperature and pressure, Other types of check valves and check valve gate 、 expansion joint, and being widely used in petroleum industry, chemistry, food, medicals, light industry, paper, water and electricity, ship and boat, steel and casting, Energy and Environment industry. The main valves are ever used in heat-supplying projects of National council office.

我公司主要产品有双向三偏心金属密封伸缩蝶阀、水轮机进水液控蝶阀、软密封闸阀、三维偏心全金属密封蝶阀、自动补偿双向硬密封蝶阀、耐高温金属密封蝶阀、液控缓闭止回蝶阀、对夹式蝶阀、偏心式蝶阀、伸缩蝶阀、偏心半球阀、偏心球阀、通风阀、调节阀、双偏心蝶阀、无销蝶阀、微阻缓闭消声止回阀、旋启式止回阀、防泥沙型蝶阀、自动补水阀、阀板可移动蝶阀、偏心缓闭止回阀、多功能水力控制阀、闸门、伸缩接头和管道伸缩器等三十大系列3000多个规格，广泛用于电力、石油、化工、食品、医药、轻纺、造纸、供排水、船舶、冶炼、能源、环保等行业的腐蚀性、非腐蚀性气体、液体、半流体及固体粉末容器和管网中。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。