实用

This test system can not only be used to study the hot safety test system of ammonium nitrate in aqueous solution, at the same time it is with an important practical value in safe production of fertilizers.

本研究设计出的这套测试系统不仅可以用于硝酸铵水溶液的热安全性研究，而且对化肥安全生产具有重要的实用价值。

Since the production of carbon nanotubes synthesized by arc-discharge method contains impurities such as carbon nano-particles, amorphism carbon and graphite fragment, several purification methods were used to purify carbon nanotubes. It is found that with oxidation method in air, we can easily get purified carbon nanotubes.

由于用电弧放电法合成出来的纳米碳管产物中除了有纳米碳管外，还含有一些纳米石墨颗粒、无定形碳和石墨碎片等，因此本文对用电弧放电法合成出的纳米碳管进行了多种方法、探索性的提纯研究，实验结果发现，利用大气氧化法对纳米碳管进行提纯效果好，设备简单，是一种方便实用的方法。

You will find it amusingly practical for New year, festivals,weddings,birthdays, holidays or almost any given anniversary.

你将发现它代表新年的实用趣味、节日，婚礼、生日、假日，或者几乎任何约定俗成的周年。

In Diagnosis of Acute Pancreatitis and Comparing with Amylase and Lipase

2在AP诊断中的作用及与淀粉酶和脂肪酶的对比实验-实用医技杂志

The patent gives the inventor an exclusive right to make, use and sell the thing invented.

专利授予发明者以专有权以制作，实用和出售他的发明。

Administration of insulin and glucose or analeptic drugs is of little practical value.

管理胰岛素和葡萄糖或者兴奋剂药物有一点点实用价值。

Based on the comparison analyses of the viscosity method, transition pressure method, visco-elesticity analogue and residual resistance factors as well as the application range, a series of technical methods and testing standards to evaluate the gel strength and properties have been set up and also the classification indexes of the gel has been established.

通过对粘度法、转变压力法、粘弹性模量法和残余阻力系数法等优缺点和实用范围的对比分析，建立了一套评价凝胶强度、性能的技术方法和测试标准；确定了凝胶分类指标。

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。

On the basis of Bedrosian's product theorem, the condition under which the analytic expression of wideband signal is exact, is presented.

根据Bedrosian乘积定理，提出了宽带信号解析表达式成立的条件，并给出了实用的判别方法。

Compared to the western modern medication, it has distinct technical peculiarities, among which Handwork Anaplasty and Fixation Techniques is the most outstanding one.

论文的下篇重点分析中医手法整复固定技术的技术特点：实用目的明确；强调经验功夫；推崇自然之妙。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐