田赛距离测量中全站仪的设计与实现

本文提出了将智能全站仪这种精密测量仪器广泛应用于田赛项目测量中，并结合其他科技元素用于解决田赛项目中跳远、投掷等项目的测量及数据管理问题，实现实时、自动、准确地裁定和报告比赛成绩。     

积分中值屈服准则解析厚板轧制椭圆速度场

为解决非线性Mises比塑性功率积分困难以及由此导致的轧制功率解析式难以获得的问题,本文通过建立并利用线性比塑性功率表达式对提出的椭圆速度场进行能量分析,得到了轧制力能参数的解析解.文中通过对变角度屈服函数求积分中值,构建了一个新的屈服准则,它是主应力分量的线性组合,在π平面上的轨迹是逼近Mises圆的等边非等角的十二边形,其基于Lode参数表达式的理论结果也与实验数据吻合较好.同时,根据厚板轧制时金属流动速度从入口到出口逐渐增大的特点,提出了水平速度分量满足椭圆方程的速度场,该速度场满足运动许可条件.通过相应的轧制能量分析,获得了基于线性屈服准则的内部变形功率以及基于应变矢量内积法上的摩擦功率与剪切功率.在此之上,通过泛函的极值变分导出了轧制力矩、轧制力以及应力状态系数的解析解,并与现场实测数据进行了对比,结果表明利用本文提出的屈服准则与速度场所建立的轧制力矩与轧制力模型与实测值吻合较好,其中轧制力误差小于5.3%,轧制力矩误差在6%左右.     

Chemistry and Toxicology of Major Bioactive Substances in Inocybe Mushrooms

Mushroom poisoning has always been a threat to human health. There are a large number of reports about ingestion of poisonous mushrooms every year around the world. It attracts the attention of researchers, especially in the aspects of toxin composition, toxic mechanism and toxin application in poisonous mushroom. Inocybe is a large genus of mushrooms and contains toxic substances including muscarine, psilocybin, psilocin, aeruginascin, lectins and baeocystin. In order to prevent and remedy mushroom poisoning, it is significant to clarify the toxic effects and mechanisms of these bioactive substances. In this review article, we summarize the chemistry, most known toxic effects and mechanisms of major toxic substances in Inocybe mushrooms, especially muscarine, psilocybin and psilocin. Their available toxicity data (different species, different administration routes) published formerly are also summarized. In addition, the treatment and medical application of these toxic substances in Inocybe mushrooms are also discussed. We hope that this review will help understanding of the chemistry and toxicology of Inocybe mushrooms as well as the potential clinical application of its bioactive substances to benefit human beings.     

Effect of Temperature and Strain Rate on the Hot Deformation Behaviour of Ferritic Stainless Steel

Metals and Materials International - The flow behaviour and microstructure characteristics of a ferritic stainless steel were investigated using plain strain compression test on a Gleeble 3500...     

国家科技部“十三五”重点研发计划地热专项全部完成立项

根据科技部“十三五”科技战略部署,于2018、2019两年时间顺利完成“干热岩能量获取及利用关键科学问题研究”、“深部碳酸盐岩热储层强化增产与利用综合评价技术”及“砂岩热储采灌增效技术与装备”三项重点研发计划项目从申报、函审、视频答辩到立项的工作。     

污水汽提系统的化学除臭清洗

文章简要介绍了化学除臭清洗剂JX-518的组成,并对采用该清洗剂对污水汽提系统进行化学除臭清洗的清洗过程及注意事项进行了详细介绍。实践证明,清洗后系统残液中硫化物及氨氮可降至很低,取得了很好的清洗效果。     

论四川盆地天然气勘探前景

中石油及其前身已在四川盆地从事天然气勘探开发工作50余年,截至2005年底累计探明天然气地质储量逾8400×10⁸m³,累计生产天然气超过2300×10⁸m³,年产量现已超过120×10⁸m³,已成为国内目前最大的产气区。对于该盆地进一步勘探前景如何的命题,从以下4个方面给予了论证：一是资源丰富、勘探成果持久不衰，近期仍有大发现；二是要辩证地认识盆地油气地质的复杂性，探索新规律，解放新领域；三是寻求地质认识和勘探技术进步是勘探突破的关键；四是继续以盆地两大地质体系（海相古隆起体系及陆相前陆盆地体系）和8套裂缝-孔隙性储集层（中上寒武统白云岩、石炭系白云岩、上二叠统长兴组生物礁白云岩、下三叠统飞仙关组鲕状白云岩、下三叠统嘉陵江组粒屑白云岩、中三叠统雷口坡组藻粒白云岩、上三叠统须家河组长石岩屑石英砂岩和中上侏罗统红层砂岩）为对象获取更多的天然气资源量及优质储量。据此得出结论：四川盆地天然气勘探前景是广阔的，但勘探难度会逐步加大。