排序方式: 共有30条查询结果,搜索用时 15 毫秒
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1病历简介男,25岁,钢水烧伤全身6小时,于1999年6月5日入院。神清,烦躁,口渴,声音嘶哑伴刺激性咳嗽。T37.3℃,P120次/min,R22次/min,BP112/75。mmHg(1mmHg=0.133kPa)。全身除头顶、双足掌面及腰部(系腰带处)外,均有不同程度烧伤。诊断:①钢水烧伤95%,浅Ⅱ度5%,深Ⅱ度40%,Ⅲ度50%;②中度吸入性损伤。立即行气管切开术,常规抗休克、抗生素、对症及创面处理。第2天胃管内引出咖啡样液体,排出柏油样大便;伤后第3天行双上肢、左下肢切痂自体微粒皮移植术,右下肢切痂,戊二醛皮覆盖术。5天后出现烦躁、谵语等精神症状,呼吸时快时慢,血气分析提示低氧 相似文献
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当人们在领略石油企业现代管理的多元形态为中国石油工业带来前所未有的巨大进步的时候,一些老石油人、老石油科技工作者,不能不怀念曾在45年前就提出,石油地质勘探工作要“搞经济核算”,要求“投资的经济总效果”等一系列科学管理理念的老石油人——陈贲。 相似文献
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宝珠寺水电站中孔孔口尺寸和总水推力在全国名列前茅,所宣泄洪水占枢纽总泄量的2/5,为了承受弧门支铰传来的巨大水推力,闸墩采用了预应力锚索结构。文章结合中孔闸墩预应力锚索张拉吨位大,技术含量高,施工工艺复杂等特点,全面地介绍了预应力锚索施工工序间的质量控制标准和措施,供类似工程参考。 相似文献
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Lingke MOU 《等离子体科学和技术》2022,24(12):124001
The avoidance of runaway electrons (REs) generated during plasma disruption is of great concern for the safe operation of tokamak devices. Experimental study on the suppression of runaway current by electrode biasing (EB) and limiter biasing (LB) has been performed on the J-TEXT tokamak, which could be an alternative way to suppress the runaway current. The experimental results show that the higher the voltage value, the smaller the runaway current in both EB and LB experiments. The runaway current can be completely suppressed at an electrode biased voltage of +450 V and a limiter biased voltage of +300 V. The comparison of the energy spectra during the runaway plateau phase shows that the maximum energy max (ERE) and radiation temperature THXR of hard x-rays (HXRs) are significantly reduced after the application of +200 V limiter biased voltage. The electric field generated by the biased voltage may be the key factor to suppress the runaway current, and the measured radial electric field increases obviously after the voltage is applied. This may result in an increase in the loss of REs to realize the suppression of runaway current. 相似文献
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Xiaobo ZHANG 《等离子体科学和技术》2022,24(6):64007
In J-TEXT tokamak, fast electron bremsstrahlung diagnostic with 9 chords equipped with multi-channel analyzer enables detailed studies of the generation and transport of fast electrons. The spatial profiles and energy spectrum of the fast electrons have been measured in two ECCD cases with either on-axis or off-axis injection, and the profiles processed by Abel-inversion are consistent with the calculated power deposition locations. Moreover, it is observed that the energy of fast electrons increases rapidly after turning off the ECCD, which may be attributed to the acceleration by the recovered loop voltage at low electron density. 相似文献
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天然气水合物具有储量大、分布广泛、清洁燃烧等优点,近年来受到研究人员的广泛关注。为了实现天然气水合物资源的安全高效开采,对其沉积层的力学稳定性进行系统评估是十分必要的。本研究在实验室内重塑了40%孔隙度的天然气水合物沉积物试样,并基于力学实验设备,对其在不同围压条件下分解过程中的力学强度及变形进行了一系列测试,获取了相应的应力应变数据。研究结果表明,水合物分解会造成沉积层强度的降低。此外,基于实验数据,在借鉴土力学邓肯-张本构模型的基础上,考虑了围压及分解时间对沉积物力学特性的影响,本文构建了适用于不同围压条件下天然气水合物沉积物分解过程中的本构模型,研究结果表明,该模型可以较好地模拟沉积物试样在分解过程中的应力应变关系,可为实现天然气水合物的安全开采提供一定的理论依据。 相似文献
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A detailed study of photon temperatures (Tph) of hard X-ray emission in lower hybrid current drive (LHCD) plasmas is presented. The photon temperature increases with the increase in plasma current and decreases with the increase in plasma density. In lower hybrid power and phase scanning experiments; there is no appreciable change in the photon temperature. The numerical results based on ray-tracing calculation and Fokker-Planck solver gives reasonable explanation for the experimental observation. Both experimental and numerical results reveal that the photon temperature depends mainly on global effects of the fast electron population, synergy between the fast electron and the loop voltage and the Coulomb slowing down. 相似文献