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Using transfer matrix method to analyze microperforated panel absorber s acoustic characteristic;2. The possibility and the significance of replacing fibred absorption materials by fibreless materials,especially by microperforated panels,are discussed.

简要地介绍了吸声材料的基本特点，阐述了无纤维性吸声材料（特别是微穿孔板吸声结构）取代传统的纤维性吸声材料的可能性及其重要意义，较详细地介绍了近年来德国以及我国科研人员在无纤维吸声材料研究上所取得的进展。

The fluence and frequency of laser was controlled precisely, which could melt and destroy the adiposis tissue without damage to the adjacent tissues. The histological study of treated adiposis tissues, post-operative reaction and clinical results were observed and studied. Results Local adipose tissues were melted and liquefied effectively by the laser. Compact fibrous tissues of cellulite were broken by the laser into loosen structure. The bleeding was lower than traditional method due to the coagulation of capillary vessels. The advantages of laser lipolysis included less edema, petechia and complications, which produced a rapid recovery and satisfactory results.

但该方法也存在疼痛、血管损伤、出血较多[1]等不足，此法主要是利用机械力插入负压吸引管，通过较强的负压将脂肪组织吸出体外，比较适用于大范围、厚层次和疏松的脂肪吸除，难以应用于小范围局限致密的脂肪组织，如面颈部和手臂部等，这些部位脂肪构成较特殊，包含有大量坚韧的呈网状交织的纤维结缔组织，质地较紧密，普通负压难以吸除，吸脂管插入和抽动阻力较大，如强行反复抽吸对组织创伤明显，因此，有必要寻找一种更加有效的治疗方法。

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。

The influence on absorption coefficient brought from shape choice with cylindrical or cone-shaped cavity, square or hexagonal profile, from different closure as air or water, from different material properties and structure sizes, are analyzed based on the numerical calculations. Some general characteristics are summarized. It shows that lowest resonance frequency of sound absorbent coefficient is inversely proportional to volume of cavity and sound absorbent coefficient is proportional to perforated percentage.

2通过数值方法研究了吸声结构内腔为圆柱腔和圆锥腔、基材的剖面形状为正四边形和正六边形、不同背衬、基材材料特性、尺寸大小对整体吸声效果的影响，总结了这些情况下非旋转对称吸声结构的声学特性变化规律，得出腔体体积越大，吸声系数最低共振频率越低；穿孔率越大，吸声系数越大的结论。

More than 10 years, I heard the company's customers valuable advice and technical absorption silk gun manufacturers, continue to improve, accumulated experience in various aspects, such as: absorption of silk Qiangtou, brothers and ceramic manufacturers have adopted easy Pengsui suction head, will not only affect production , Also increased equipment costs, we head into metal and greatly reduce the cost, a further absorption silk guns into the trachea and the row of silk from the centre, other manufacturers in 36 mm, and we changed to 38 mm, for users to replace the intake manifold, Pai more convenient when the silk, silk guns in the absorption of the two guns, made the point that hole, so it's suction row wire was also larger, users have won, we Asia and China over the years the company pursues " Is the quality of corporate life, the user is God, reasonable prices, better quality,"the purpose, we now more than 100 domestic and chemical fiber enterprises have long-term business, the company specializes in chemical fiber processing machinery parts.

十多年来，我公司听取了用户的宝贵意见，在吸丝枪制造技术上，不断改进，积累各方面经验，如：吸丝枪头子，兄弟厂家都采用陶瓷吸头容易碰碎，不但影响生产，还增加设备费用，我们改成金属头子，大大降低了成本，再有吸丝枪的进气管与排丝管中心距离，其他厂商于36mm，而我们改为38mm，为用户在更换进气管、排丝管时更为方便，在吸丝枪内的二级喷头中，孔的角度作了修正，所以它的吸力排丝量也较大，得到用户的好评，我们亚华公司多年来奉行"质量是企业生命，用户是上帝，价格合理，质量更优"的宗旨，目前我们与国内一百多家化纤企业有着长期业务往来，本公司专业加工化纤机械配件。

Furthermore, this paper explored a new feasible process of cyanide recovery,investigated the effect of time, concentration of H2SO4 and temperature on the elution of cyanide and zinc in the process of first stage elution, and discussed the effect of time,concentration of ammonia water, temperature and ultrasonic on the elution of copper in the second stage elution.

另外，本实验探索出一种可行的回收氰化物新工艺，在硫酸解吸过程中，研究了硫酸解吸的时间、浓度和温度因素对氰和锌的解吸率的影响；在氨水解吸实验中探讨了时间、温度、浓度、超声波等因素对铜解吸率的影响。

Fixation of direct dyes with silica gel ;2. Taking advantage of proof salt and high hydrophilic property of the silica gel and the carboxymethyl cellulose inarch polysalt of the super water-absorbent resin recombination,this paper made use of the water-absorbent composite form the inorganic polymer, sequentially advanced water-absorbent velocity and capacity of polymer water-absorbent resin in the brine.

利用具有良好耐盐和高亲水性能的硅凝胶与羧甲基纤维素接枝聚丙烯酸盐的高吸水树脂进行复合，制备出无机高分子的硅凝胶-羧甲基纤维素接枝聚丙烯酸盐耐盐高吸水复合材料，从而提高了高分子吸水树脂在盐水中的吸收能力及吸收速度，研究了复合材料的吸盐水性能，通过扫描电子显微镜观察了复合材料表面的微观结构，初步探讨了硅凝胶-羧甲基纤维素接枝聚丙烯酸盐耐盐高吸水复合材料的吸盐水机理。

Turkestanica var.tuberculata by the scanning electron microscope was also observed after they were identified by light microscope in the bodies of cattle and sheep. Meanwhile the results of the integumental surface was compared with mat of O.turkestanica by Tang Chongti under electron microscope and analyzed them. By means of observing, comparing and analyzing, It showed that both of O. cheni and O. titrkestanica var.tuberculata were the same species, they might only be of different name with O. turkestanica or subspecies or geographical strain, primarily.

本试验对在黑龙江省牛、羊体内检出的在光镜下鉴定为土耳其斯坦东毕吸虫结节变种和程氏东毕吸虫的二种虫体进行了体表扫描电镜观察，同时与唐崇惕所作土耳其斯坦东毕吸虫体表扫描电镜结果进行了比较和分析，初步认定程氏东毕吸虫与土耳其斯坦东毕吸虫结节变种为同一种，与土耳其斯坦东毕吸虫可能是同物异名或为其亚种或地域株。

Objective:Observes the babies and infants use nasal cannulae or changed two-sided hole pipe attracts the oxygen effect,to evaluate the nasal cannulae and the changed two-sided hole pipe attracts the oxygen to the babies and infants oxygen treatment effect is whether same.

目的：观察婴幼儿双孔吸氧管吸氧和改良双侧孔导管吸氧效果，评价双孔吸氧管吸氧和改良双侧孔导管吸氧法对婴幼儿氧疗效果是否相同。

During the moisture adsorption process from oven-dry state to the equilibrium state in 20℃, 60％RH environment, the activation enthalpy of adsorbed water during reorientation increases linearly with adsorption time.

从绝干状态→20℃，60％RH平衡态的水分吸着过程中，吸着水分子在回转取向过程中的活化焓随着吸湿时间呈线性增加，这说明一个吸着水分子与周围木材吸着点之间的氢键结合数的平均值随着吸湿过程的进行逐渐增多，直至达到平衡状态。

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。