Results 21 to 30 of about 172,129 (134)
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT In laser‐directed energy deposition (LDED) of TiC/Ti6Al4V composites, a low content of micron‐sized TiC provides a good strengthening effect on hardness and strength, but the improvement in plasticity remains a challenge. By introducing synchronous ultrasonic impact treatment (UIT) into the LDED process, an ultrasonic‐assisted LDED (UA‐LDED ...
Yuzhou Zeng +9 more
wiley +1 more source
Gongye shui chuli, 2005 超声化学是一种处理废水中污染物的新型氧化技术,结合近几年超声化学理论的发展,简单介绍了影响超声化学效应的主要因素:超声波强度、频率、介质、温度等;还简单介绍了基于超声波技术的高级氧化技术:超声/H2O2或O3氧化技术、超声/光催化氧化技术、超声/湿式氧化技术和超声/生物氧化技术在废水处理中的应用,并对今后该技术的研究与发展进行了展望。
宗刚, 金奇庭, 陈瑞芬, 李茹
doaj +2 more sources
Ultrasound in Obstetrics &Gynecology, Volume 68, Issue 3, Page 395-405, September 2026.ABSTRACT Objective To evaluate whether fetuses exposed to threatened preterm labor (PTL) without intra‐amniotic infection or inflammation (IAI), who were born ≥ 34 weeks' gestation, show signs of cardiac remodeling and dysfunction at admission and 4 weeks after the episode of threatened PTL.
C. Murillo +11 more
wiley +1 more source
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT The regeneration of osteoporotic bone defects is severely hampered by compromised endogenous healing capacity, demanding advanced strategies that actively orchestrate pro‐osteogenic microenvironments. Here, we report an integrated, self‐powered osteo‐regenerative system that uniquely leverages a dual ultrasound‐responsive piezoelectric ...
Bing Tan +6 more
wiley +1 more source
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Esophageal cancer is the seventh leading cause of cancer death, and the energy depletion in cancer cells can be achieved through synergistic therapy. The integration of sonodynamic therapy and chemotherapy offers a promising comprehensive treatment strategy for esophageal cancer.
Mengya Li +4 more
wiley +1 more source
, 2013 针对高超声速近连续流动模拟,发展高效的统计粒子模拟方法,进而研究高超声速近连续流动的热非平衡特征,分析连续性假设的失效准则。初步的研究表明,在传统的DSMC方法基础上,在粒子碰撞时考虑分子所在位置各个宏观流动物理量的差异 ...
杨超, 孙泉华
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Gongye shui chuli, 2013 研究了超声波、絮凝剂、超声波联合絮凝剂强化污泥脱水的效果。结果表明,单独采用超声波处理时,双频超声波的污泥脱水效果优于单频超声波;单独絮凝剂处理时,硫酸铝的污泥脱水效果优于硫酸铁和聚丙烯酰胺。超声波联合絮凝剂处理时,投加硫酸铝和超声波处理同时进行的污泥脱水效果最佳,正交回归优化超声时间(X2)、絮凝剂投加量(X2)、超声功率(X2)三者之间的线性关系为Y=0.864+0.13X1+0.09X2+0.01X3+0.03X1X2。
曹晨旸, 李玉瑛
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Magnetization Dynamics Control for Noise Reduction in Fluxgate Sensors
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Fluxgate sensors are indispensable for the detection of weak magnetic fields. However, their noise performance remains constrained by an incomplete understanding of the interplay between the high‐frequency magnetization dynamics of the core material and the overall sensor behavior.
Chunyang Mu +11 more
wiley +1 more source
, 2009 本文采用10组分替代模型和等熵假设数值分析了超临界态煤油的超声速流动特性，给出了煤油超声速流动的等熵线分布、马赫数与喷管面积关系、温度/压力随马赫数的变化等一系列结果。同时进行了相应的加热煤油的喷管流动实验，验证了数值分析的可靠性，并获得了超临界态煤油产生稳定的超声速流动的大致工作区间。本文还采用雷诺平均方法结合SST 湍流模型数值模拟了二维超声速气流（总温1500K，马赫数2.5）中超临界态煤油的超声速/声速喷射和混合过程，以及射流出口马赫数对提高穿透深度的作用。研究发现在相同的煤油流量条件下 ...
王晶 +4 more
core +2 more sources
Zhongshan Daxue xuebao. Yixue kexue ban, 2023 目的开发一种辅助发育性髋关节发育不良（DDH）的早期超声筛查的深度学习系统，即新型智能髋关节超声技术（S-hip），并验证其临床应用价值。方法选取我院自 2021年11月至 2022年8月通过标注和审核的婴儿髋关节冠状切面超声图像11 100张，其中8 100张图像用于训练集，3 000张用于测试集，用于构建S-hip深度学习系统。另采集87例婴儿双侧髋关节共174张标准冠状切面超声图像用于验证S-hip的自动测量与医生人工测量之间的一致性。S-hip、超声专家和住院医师分别测量α角、β角和FHC ...
徐英 +6 more
doaj +2 more sources