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The basic approach of protecting people from being hurt or killed in an accident is to improve crashworthiness of vehicles. This paper starts with discussing theories and methods for vehicle passive safety design, which included experiential methods, analytic methods, multi-body dynamics methods, crash test methods and the finite element method. Emphasis will be paid to the basic FEM theories and algorithms of impact problems. Topics discussed include the governing equation, element discretization, hourglass control, time integration, material model, shell element algorithms and contact-impact algorithms. For more reliable simulation results, this paper then conducts study on how to accurately get material model parameters by combining the FEM method with experimental method, and develops relevant material test machine and parameter calculating software. Based on that, basic typical impact simulation and test validation study are conducted. On the basis of the above work, the paper studies the thin-shell structures'crashworthiness, which was affected by the following factors: spot-weld features, shell thickness, cross-section and pre-deformation. As to vehicle parts'crashworthiness, the paper conducts simulation study of designing energy-absorbing steering system and adaptive airbag system. A practical energy-absorbing steering wheel is designed as an example. In further depth research, the paper suggests several inverse quantificational methods for vehicle crashworthiness design based on the ideal crash characteristics. The above theories and methods are applied with good results through several practical vehicles' crashworthiness design and improvement.

文中对汽车碰撞安全性的设计理论和方法进行了归类和总结，其中包括经验法、解析法、多刚体动力学法、试验法以及有限元方法等；重点介绍了碰撞有限元法的基本理论和有关算法，涉及到有限元求解控制方程、单元离散、沙漏模态控制、时间积分、材料模型和应力修正、薄壳单元算法以及接触碰撞界面算法等，探讨了有限元计算中的材料模型参数获取技术，开发了相应的材料试验装置及材料模型参数反求软件，在此基础上进行了基本的碰撞仿真算例和试验对比研究；文中通过应用有限元方法研究了薄壁构件的碰撞吸能特性，指出了设计薄壁吸能构件时需要考虑的几个主要影响因素，即焊点、壁厚、横截面和预变形等；在关于车辆部件的碰撞安全性能设计中进行了吸能转向机构和自适应安全气囊的仿真研究，提出了吸能转向机构和自适应安全气囊的仿真研究方法；文中最后探讨了整车碰撞性能的设计与改进方法，提出了以理想碰撞特性为目标，采用分段加速度或者根据碰撞时间进行设计的反推设计法、部件吸能仿真优化设计法等量化设计方法，并通过综合应用文中所讨论的相关技术进行了整车碰撞性能的设计与改进实例研究，所选定的车型是大众化的普通轿车和碰撞安全性基础较差的微型面包车，研究结果表明，本文所提出的设计与改进方法是适用而有效的，具有重要的工程实用意义和价值。

Under normal circumstances, the printer paper into the slot there is a photoelectric sensor Office of the photoelectric sensor can be sensitive to "capture" to paper, whether or not correctly placed in the feed tank, feed tank if there is printing paper exist, the Photoelectric sensors can be identified on the paper, and generate a recognition signal transmission to the printer, print to inform the printer to do the preparatory work, even if the paper into the slot there is no printing paper, the photoelectric sensor control signals will be transmitted to the printer, where do not tell the printer to print tasks.

通常情况下，打印机进纸槽处存在一个光电传感器，该光电传感器能敏锐地&捕捉&到纸张是否正确地放置到进纸槽中了，倘若进纸槽中有打印纸张存在的话，该光电传感器就可以识别到纸张，并产生一识别信号传输给打印机，通知打印机做到打印准备工作，即使进纸槽中没有放打印纸时，光电传感器也会有控制信号传输到打印机那里，告诉打印机暂时没有打印任务。

My company occupies 12,000 square meters, specializing in the production of honeycomb, honeycomb cardboard, honeycomb paper core, paper Guarding Kok, paper and platen, paper pallets, paper pallets, paper pallets, composite flooring boards, laminated flooring board , sliding tray.

我公司占地12000平方米，专业生产蜂窝纸板，蜂窝纸箱，蜂窝纸芯，纸护角，纸地台板，纸卡板，纸栈板，纸托盘，复合地台板，胶合地台板，滑拖盘。

In recent 8 years, we focus on latest technology in this field, with our consistent effort, we successfully developed several types of paper bag making machinery and related equipment, like paper shopping bag machine, paper hand bag making plant, food paper bag machine, Kraft bag making machine, block bottom valve bag converting machine, multilayer bag tube making machine, bottom making machine, paper handle making machine, paper rope making machine, which could make handle bag, shopping bag, food bag, flour bag, cement bag, chemical material bag and so on.

在最近的8年中，我们专注于最新的技术，在这一领域，与我们一贯的努力，我们成功地开发了数个类型的纸袋，使机械及相关设备，如纸袋机，纸张，另一方面制袋厂，食品纸袋机，卡夫制袋机，座底阀袋机，多层袋管机，自下而上的决策机，纸张处理，使机，纸绳子机，它可以使处理袋，购物袋，食品袋，袋面粉，水泥袋，化工原料袋等。

It can identify the denomination and paper currency and seek out deformity. Concerning shortages of the previsions design of Paper Currency Identification Instrument, such as poor seeking-out deformity and defective unity of paper currency between new version and old one, a new identifying method is promoted in the thesis that Eight-line Seeking-points Method based on regional gray scale and paper currency sample database is on service by means of the points from paper-scanned background edge looking for the points on the paper edge.

本文针对当前国内图像识别技术在纸币清分机中的应用不成熟而导致对人民币挑残能力弱、在人民币新旧程度和面向分类中的一致性差的情况，提出了一种基于区域灰度特征提取的八线找点算法和区间估计建立标准样本库相结合的图像识别方法。

We can provide you with high-quality color printing paper card; paper frame frame; corrugated box; display boxes; bag; kraft paper bags; Bingxiang Tie; stickers; samples; posters, brochures; carton; color printing paper Me; UV printed cards; desk calendar calendar; Christmas gifts; export carton; various paper products of all kinds color printing, such as paper products, but also for your design, printing fine album, posters, calendars, handbags and other business promotion Supplies.

我们能为您提供高品质的彩印纸卡；纸制相架相框；瓦楞彩盒；展示盒；手提袋；牛皮纸袋；冰箱贴；不干胶；样本；海报；说明书；纸盒；彩印纸箱；UV印刷；贺卡；台历挂历；圣诞礼品；出口纸箱；各种纸制品；各类彩印；等纸制品，也能为您设计、印刷精美的画册、海报、挂历、手提袋等商务宣传用品。

Arguably, the nozzle to limit position paper, as soon as possible, and it's jitter destroyed the suction nozzle swing movement and the co-ordination of the aliquation valve, causing the pendulum back through the nozzle, the paper could not be immediately spoiledour suction nozzle feed to end just swing pressure wheel has come down upon the relationship between the paper over, resulting in a swayig press paper round has not yet been pressed paper, paper suction nozzle the cardboard in place, and with live paerboard to move back a little bit, causing a pause.

按理说，吸嘴摆到极限场所答当即不收纸，而这种抖不静爱护了吸嘴摆不静不静息与呼气阀的打扰，使得吸嘴往回摆时，未能当即不收纸，爱护了吸嘴送纸到尽脚时摆不静压纸轮恰好压住纸的移交干系，导致摆不静压纸轮还来压住纸，递纸吸嘴不离已把纸板送到位，并带住纸板此后定一下，引起迟滞。

Because aluminum surface unlike composite aluminum foil paper and aucilisty paper, it has a certain amount of micro-small holes, moisture penetration into the paper can be, so it is important for moisture control; and aim at aluminum sheet piling up cannot be printed matter is exhausted, the card with a maximum of 3000, because aluminum is not wear-resistant surface, piling up too much will crush India face about note aluminized paper storage time should not be too long, it is best not more than two months, for a long time will be subdivisionof with the back of the paper, the following is issued on picking flowers; by the aluminum sheet business card printing and membership card making bearing in mind that when you heat curing temperatures not too high, too high a temperature can affect aluminum surface which flowers, and too hot paper antishrinking rise on deformation is too big to post processing.

因为真空镀铝纸的暗地不像不简单铝箔纸和PET纸，它有必定的微洪不小孔，水不合可以不合泌出纸，所以不差水不合的把持不一不合重给；③真空镀铝纸的印品堆放不克不及太众，卡纸最众不超功3000张，因为真空镀铝纸的暗地不耐磨，堆放太众会压伤印背；④夺纲真空镀铝纸的不领取工夫不给太不幼，最好不给超功两个日，因为工夫不幼了暗地会跟纸的背后粘连，变成纸背发不攒；⑤真空镀铝纸的制卡和会员卡制息给夺纲冷固化时温量不给太矮，温量矮了会感化真空镀铝纸的暗地，使其变不攒，而且太冷纸张缩涨变形太不小，不差后增工感化很不小。

In recent 8 years, we focus on latest technology in this field, with our consistent effort, we successfully developed several types of paper bag making machinery and related equipment, like paper shopping bag machine, paper hand bag making plant, food paper bag machine, Kraft bag making machine, block bottom valve bag converting machine, multilayer bag tube making machine, bottom making machine, paper handle making machine, paper rope making machine, which could make handle bag, shopping bag, food bag, flour bag, cement bag, chemical material bag and so on.

近8年来，我们的重点是最新技术，在这一领域，随着我们不断努力，我们研制成功的几种类型的纸袋，使机械及相关器材，如纸袋机皮手袋炼钢厂，食品纸袋机，牛皮袋制作机，座底阀袋转换器多层袋，管接机，底部加工机，纸张处理的机器，造纸绳机它可以处理袋，购物袋，食品袋，面粉袋，水泥袋，化学材料袋等。

It owns 33 sets of various machined paper production line, annual productivity 280,000ton. Main products include one time coated manila paper, secondary coated manila paper, ordinary white paper, grey paper, carton board, wave shaped board, compound grey board, carton board, printing paper and honeycomb board etc., total 13 series and over 100 specifications. The products were sold all over China and Hongkong and Macao areas.

职工人数4850人，其中各类工程技术人员518人，拥有各种机制纸生产线33条，年生产能力28万吨，主要产品有一次涂布白板纸、二次涂布白板纸、普通白板纸、灰板纸、高克重灰板纸、复合灰板纸、牛皮箱板纸、普通箱板纸、黄板纸、瓦楞原纸、高强瓦楞原纸、书写纸及蜂窝纸板等十三个系列一百多个品种规格，产品销全国九十多个省市地区以及港澳等地，连续五年产销率达98%以上。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。