建立3种换热器管板有限元分析的简化模型:当量实心板与杆单元模型(模型A)；实体管板与杆单元模型(模型B)；实体管板与壳单元模型(模型C),通过典型算例,将3种简化模型的计算结果与全实体模型(模型D)进行对比分析.结果表明,模型C管板的应力强度、轴向位移及管束轴向力均与实体模型D较为接近,且得到保守结果,计算精度及效率优势较为明显.

关键词：换热器；管板；有限元模型；管束轴向力

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盘磨机磨浆时受各种因素影响,磨盘问隙极易发生变化,磨盘间隙的测量与调节直接关系到磨浆或打浆质量和磨片寿命.本文首先介绍了盘磨机磨盘间隙的测量方法,着重介绍了国外专利中提到的磨盘间隙在线测量的方法和技术,包括直接测量和间接测量；然后介绍了常用的磨盘间隙调节方法；并对各种磨盘间隙测量和调节方法的特点和应用范围进行了分析.

关键词：盘磨机；磨盘间隙；测量；调节

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较详细地介绍了在役黑液管式降膜蒸发器定期检验的内容及方法和应注意的问题.

关键词：黑液蒸发器；定期检验；涡流检测

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关键词：环卫机械行业；发展前景

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关键词：工程机械；出口；核心技术

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关键词：江苏；智能装备；产值

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关键词：中国重工；新订单；高端装备

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Abdominal aortic aneurysm, or AAA, is an abnormal enlargement or dilation (ballooning) of the abdominal aorta. It occurs most commonly in the infrarenal and aortoiliac arteries. In this condition, the diameter of the abdominal aorta exceeds more than 20 mm. Aging, cigarette smoking, atherosclerosis, hypertension, and genetic predisposition are some of the common causes for AAA. Since the wall of the aneurysm is weaker than a normal aortic wall, rupturing of AAA is a major complication associated with this condition. This can result in severe internal hemorrhaging in the abdominal cavity, which is often fatal, and can lead to the death of the patient in minutes. Surgery is recommended if the aneurysm noticed is larger than 5.5 cm in diameter. Endovascular AAA repair devices are used in minimally invasive procedures to repair abdominal aorta aneurysms. In this procedure, an incision is made in the groin and an aortic aneurysm stent graft is inserted through the femoral artery into the aorta in a collapsed position and placed at site of the aneurysm. The stent graft is then expanded and the aneurysm shrinks down into the graft, and thereby, provides support to the aortic wall.The Global Endovascular AAA Repair Devices market is growing at a steady rate. The Americas is the major contributor to this market, followed by the EMEA and APAC regions. The US, which has the world's highest per capita healthcare expenditure, dominated the Global market in 2012. The market is expected to witness an improvement in its growth rate and post a CAGR of 10.67 percent during the period 2012-2016.

关键词：腹主动脉瘤；肿大；腹主动脉扩张；AAA

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Food safety testing refers to testing, inspection, and verification of food products to help detect contaminants responsible for food-borne illness, toxicity, and poisoning. Foods products are contaminated by various contaminants such as pathogens, toxins, GMOs, pesticides, and others. Pathogens are the main contaminants present in food products. The outbreaks of food poisoning cases leading to the death of many people in recent years have increased the concern about food safety and its testing. Food safety testing checks whether harmful food pathogens and allergens are present in the tested food, thereby keeping contaminated products away from the consumers.

关键词：食品安全测试；检测污染物；负责食源性疾病

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关键词：资产获利；*ST；二重保壳；二重集团

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