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| 1 | 铝合金激光深熔焊气孔形成机理与控制技术显示文摘观察了铝合金激光深熔焊气孔的分布特征和形貌特征,深入分析了气孔的形成机理,研究了双光点能量分布的激光对铝合金激光深熔焊气孔的控制效果.结果表明,铝合金激光深熔焊焊缝中存在分布特征和形貌特征不同的两类气孔,即冶金类气孔和工艺类气孔.冶金类气孔的形成与氢在熔池中的析出、聚集与合并有关,而工艺类气孔产生的根本原因是焊接过程中匙孔的瞬间失稳.采用双光点能量分布的激光焊接铝合金可以扩大匙孔张口和根部直径,改善匙孔壁的波动状态,增强匙孔的稳定性,从而减少工艺类气孔的产生,但对冶金类气孔没有明显影响. | 巩水利 姚伟 Steve Shi | 2009 | 焊接学报2009,30,1: | 23 |
| 2 | 铝合金激光双光点焊接工艺特性显示文摘对铝合金薄板激光单光点和双光点焊接(包括不填丝和填丝)的焊缝成形、对接间隙和准直度容许裕度以及气孔状况进行了比较,并分析了双光点能量分布的激光对铝合金焊接的影响。结果表明,与激光单光点焊接相比,激光双光点焊接铝合金所得焊缝表面质量更好,焊缝熔宽更大,对接间隙和准直度容许裕度明显放宽。激光双光点焊接铝合金可以显著减少焊缝中大气孔的数量,但对焊缝中小气孔数量的影响不明显。此外,填加焊丝可以进一步改善焊缝表面质量并放宽对接间隙和准直度容许裕度,但将增大焊缝产生大气孔的倾向,采用激光双光点焊接仍可使焊缝中大气孔的数量明显减少。 | 姚伟 巩水利 Steve Shi | 2007 | 焊接学报2007,28,4: | 8 |
| 3 | 车用高强钢的激光焊接显示文摘本文论述了超高强钢(UHS)薄板焊接工艺的进展,焊接采用光纤传输固态激光器,确定了焊缝的强度和成形性能。采用三种不同的光纤传输固态激光器对厚度0.8~1.5mm、拉伸强度600~1550MPa、同种材料和不同材料组合的双相钢(DP)、相变诱发塑性钢(TRIP)、Usibor钢和硼钢进行自发二氧化碳激光焊接试验,以获得穿透的对接搭接双相焊缝。确定了熔合区和热影响区的硬化、软化行为,还分析了激光工艺参数对焊接速度、焊缝形貌及接头性能的影响。 | Steve Shi Steve Westgate 车晓玲 | 2008 | 金属加工(热加工)2008,,14: | 4 |
| 4 | Shift current bulk photovoltaic effect in polar materials—hybrid and oxide perovskites and beyond显示文摘The bulk photovoltaic effect(BPVE)refers to the generation of a steady photocurrent and above-bandgap photovoltage in a single-phase homogeneous material lacking inversion symmetry.The mechanism of BPVE is decidedly different from the typical p-n junction-based photovoltaic mechanism in heterogeneous materials.Recently,there has been renewed interest in ferroelectric materials for solar energy conversion,inspired by the discovery of above-bandgap photovoltages in ferroelectrics,the invention of low bandgap ferroelectric materials and the rapidly improving power conversion efficiency of metal halide perovskites.However,as long as the nature of the BPVE and its dependence on composition and structure remain poorly understood,materials engineering and the realisation of its true potential will be hampered.In this review article,we survey the history,development and recent progress in understanding the mechanisms of BPVE,with a focus on the shift current mechanism,an intrinsic BPVE that is universal to all materials lacking inversion symmetry.In addition to explaining the theory of shift current,materials design opportunities and challenges will be discussed for future applications of the BPVE. | Liang Z Tan Fan Zheng Steve M Young Fenggong Wang Shi Liu Andrew M Rappe | 2016 | npj Computational Materials2016,,1: | 4 |
| 5 | Combined pars plana vitrectomy and Baerveldt glaucoma implant placement for refractory glaucoma显示文摘AIM: To evaluate outcomes of combined pars plana vitrectomy and Baerveldt glaucoma implant(PPV-BGI)placement for refractory glaucoma.·METHODS: The medical records of 92 eyes(89patients) that underwent PPV-BGI were retrospectively reviewed, including 43 eyes with neovascular glaucoma(NVG) and 49 eyes with other types of glaucoma(non-NVG).·RESULTS: Outcome measures were visual acuity(VA),intraocular pressure(IOP), glaucoma medical therapy,complications, and success [VA >hand motions(HM),IOP ≥6 mm Hg and ≤21 mm Hg, no subsequent glaucoma surgery]. Cumulative success rates for the non-NVG group and NVG group were 79% and 40% at1 y, respectively(P =0.038). No difference in the rates of surgical success were found between pars plana and anterior chamber tube placement. Preoperative IOP(mean±SD) was 30.3±11.7 mm Hg in the Non-NVG group and 40.0 ±10.6 mm Hg in the NVG group, and IOP was reduced to 15±9.5 mm Hg in the non-NVG group and 15±10.5 mm Hg in the NVG at 1y. Number of glaucoma medications(mean ±SD) decreased from 2.7 ±1.3 in the non-NVG group and 2.8 ±1.3 in the NVG group preoperatively to 0.76 ±1.18 in the non-NVG group and0.51±1.00 in the NVG group at 1y. Improvement in VA of≥2 Snellen lines was observed in 25(27%) eyes,although only 33% of non-NVG eyes and 2.3% of NVG eyes maintained VA better than 20/200 at 1y. Nonclearingvitreous hemorrhage was the most common postoperative complication occurring in 16(17%) eyes,and postoperative suprachoroidal hemorrhages developed in 5(5.4%) eyes.·CONCLUSION: PPV-BGI is a viable surgical option for eyes with refractory glaucoma, but visual outcomes are frequently poor because of ocular comorbidities,especially in eyes with NVG. The location of tube placement does not influence surgical outcome and should be left to the discretion of the surgeon. | Thalmon R.Campagnoli Sung Soo Kim William E.Smiddy Steve J.Gedde Donald L.Budenz Richard K.Parrish II Paul F.Palmberg William Feuer Wei Shi | 2015 | International Journal of Ophthalmology(English edition)2015,8,5: | 3 |
| 6 | Zinc deficiency impairs T cell function in mice with primary infection of Helig- mosomoides po lygyrus (Nematoda) Parasite显示文摘 | Shi H N Scott M E Steve | 1994 | Im- munul1994,,16: | 1 |
| 7 | Simultaneous Monito ring of Both Optical Signal-to-Noise Ratio and Polari zation Mode Dispersion Using Polarization Scrambling and Polarization Beam Splitting 显示文摘 | L-S Yao X Steve Shi Y | 2005 | Journal of Light wave Technology2005,23,10: | 1 |
| 8 | High-reliable fused couplers显示文摘 | Zhong Shi Steve Ren | 2002 | Optical fiber and planar waveguide technology Ⅱ2002,4904,: | 1 |
| 9 | Single-Cell Transcriptome Analyses Reveal Signals to Activate Dormant Neural Stem Cells显示文摘 | Yuping Luo Volkan Coskun Aibing Liang Juehua Yu Liming Cheng Weihong Ge Zhanping Shi Kunshan Zhang Chun Li Yaru Cui Haijun Lin Dandan Luo Junbang Wang Connie Lin Zachary Dai Hongwen Zhu Jun Zhang Jie Liu Hailiang Liu Jean deVellis Steve Horvath Yi Eve Sun | 2015 | Cell2015,,5: | 1 |
| 10 | 单身春节回家的“自保”妙招显示文摘春节回家被逼问婚姻大事已经成为了单身游子们的必闯之关,有些甚至为了躲避,选择放弃回家团聚,你遇到了该怎么做?让情感专家帮你过关~逢年过节是一年里难得的喜庆时刻,但是有两件事情会随着一年年时间流逝而变得越来越糟糕,一个是央视春晚,另一个就是别人对你情感状态的八卦和唠叨。春晚不好看可以换台,他人的唠叨你却只能强迫自己受着。 | Steve Shi | 2016 | 大众健康2016,0,2: | 0 |
| 11 | 需要纪念日的理由显示文摘预期制造快乐等待某些快乐事件的发生会给人带来很大的兴奋感和愉悦感,其程度堪比实际的快乐体验。纪念日就是除了节假日以外,人们给自己设定的一些值得期待的日子。激发效应认知心理学研究发现,当你接触某一个特定的刺激物之后,对于其他刺激物的反应也会产生变化。每当想起、提及纪念目的时候。人们在其他行为上,例如对待伴侣或者他人的态度也会有小小的变化。这些变化在无形中促进了彼此的关系,因此人们觉得庆祝纪念日有利于维护人们之间的关系。 | Steve Shi | 2015 | 读者(原创版)2015,0,3: | 0 |
| 12 | Simultaneous gap arthroplasty combined with distraction osteogenesis in the treatment of unilateral temporo-mandibular joint ankylosis with micrognathia deformity显示文摘 | Hong Bo Yu Steve Guofang Shen Shi Lei Zhang Xu Dong Wang You Sheng Tang | 2008 | 中国口腔颌面外科杂志2008,6,B05: | 0 |