摘要：A study was conducted to analyze the deformation mechanism of strongly weathered quartz schist in the Daliangshan Tunnel,located in the western Transverse Mountain area.A large deformation problem was experienced during the tunnel *** mitigate this problem,a support system was designed incorporating negative Poisson ratio(NPR)anchor cables with negative Poisson ratio *** model experiments,field experiments,and numerical simulation experiments were conducted to investigate the compensation mechanical behavior of NPR anchor *** large deformations of soft rocks in the Daliangshan Tunnel are caused by a high ground stress,a high degree of joint fracture development,and a high degree of surrounding rock fragmentation.A compensation mechanics support system combining long and short NPR anchor cables was suggested to provide sufficient counter-support force(approximately 350 kN)for the surrounding rock inside the *** the NPR anchor cable support system with the original support system used in the Daliangshan tunnel showed that an NPR anchor cable support system,combining cables of 6.3 m and 10.3 m in length,effectively prevented convergence of surrounding rock deformation,and the integrated settlement convergence value remained below 300 *** study provides an effective scientific basis for resolving large deformation problems in deeply buried soft rocks in western transverse mountain areas.

摘要：Based on the building principle of additive manufacturing,printing orientation mainly determines the tribological properties of joint *** this study,we created a polyether-ether-ketone(PEEK)joint prosthesis using fused filament fabrication and investigated the effects of printing orientation on its tribological properties using a pin-on-plate tribometer in 25% newborn calf *** ultrahigh molecular weight polyethylene transfer film is formed on the surface of PEEK due to the mechanical capture of wear debris by the 3D-printed groove morphology,which is significantly impacted by the printing orientation of *** the printing orientation was parallel to the sliding direction of friction,the number and size of the transfer film increased due to higher steady *** transfer film protected the matrix and reduced the friction coefficient and wear rate of friction pairs by 39.13%and 74.33%,***,our findings provide a novel perspective regarding the role of printing orientation in designing knee prostheses,facilitating its practical applications.

摘要：空气稳定有机自由基的发现引起了人们对探究其在分子电子学和自旋电子学中应用的兴趣.这些自由基具有独特的开壳层电子结构,因而表现出特殊的电学特性.由于其较弱的旋轨耦合特性,也使得其成为自旋电子学的重要研究对象.此外,自由基还可以通过二聚、分子识别和机械互锁等分子间相互作用来构筑超分子器件.本文综述了空气稳定有机自由基在电子学及自旋电子学中的应用,通过详述其卓越的电磁性能来拓展启发分子设计的多样性.本综述还概述了超分子自由基的制备方法和相关性质的研究进展,拓宽了单分子研究的范围.此外,自由基介导的单分子反应是一个新兴的研究方向,本文也对该领域的未来发展方向进行了展望.通过阐明空气稳定有机自由基的应用潜力,本文将有望对分子电子学和自旋电子学的研究产生一定的指导意义.

摘要：在最近的年里，在中国三角洲城市和邻近的区域里加强 waterlogging，盐水侵入，沼泽地损失，和生态系统降级产生了紧迫的需要创造被适合到合并海水平上升的两现在和将来的气候的一种城市的形式。然而，改编计划举起是慢的。因为城市的形式的模式以减少或加强它的影响的方法与吝啬的海水平上升(MSLR ) 交往，这是特别地不幸的。当前有二个主要障碍，在逮捕与设计从温暖的全球气候 geomorphologic MSLR 设计和海面升降的 MSLR 设计填写了的 MSLR 的参考计划的改编的实现是重要的，并且使全面风险成为对 MSLR 设计的评价。现在的评论在印射如下使这些城市适应 MSLR 设计的中国三角洲城市，然后一个观点上的 MSLR 设计和他们的风险评价途径显示出最近的进步六个方面。1 ) geomorphologic MSLR 设计被自然构造沉淀设计贡献，由人为的 geomorphologic 的 MSLR 设计变化。前者需要在一个全球框架被更新。后者由陆路被积累从地下的水弄空的沉淀，河床的侵蚀从归因于分水岭的构造的沉积供应衰落引起的水水平秋天建水坝，人工的沙挖掘，由包括陆地开垦设计工程的水水平加薪，深水路规定，并且新鲜的水水库。2 ) 由人为的 geomorphologic 控制 MSLR 设计变化。3 ) IPCC AR5 RCP MSLR 情形被期望在中国三角洲上被预测到本地海面升降的 MSLR 设计。4 )? MSLR 设计需要被匹配到一本本地举起资料。5 ) 与半分析的水动力学，河口隧道网络，系统动力学和改编点数字的地区性的河海的当模特儿的途径是观点。6 ) 计划到 MSLR 设计的改编要求对洪水的风险的一个全面风险评价，新鲜的水供应缺乏，沿海的侵蚀，沼泽地损失，中国三角洲城市和邻近的区域里的港口和水路的 siltation。

摘要：Suitable optimization and simulation were performed using a powerful software package with a mature database as well as modem measurement facilities, which led to the successful designing and manufacturing of advanced steels. In the course of designing, the composition of a large section of prehardened mold steel for plastics was estimated so as to lower the quantities of oxide inclusions to change the type of carbides and to raise the machinability. The composition and process were adjusted to obtain satisfactory surface quality for the prevailing galvanization in transformation-induced plasticity （TRIP） steel. The refuting process of low-carbon steel was simulated in the light of both Thermo-Calc and Factsage. Thermodynamic and kinetic analyses were always conducted during the test and the procedure.

摘要：In this paper,a reflection magnet to be installed in the EAST neutral beam injection system is simulated and *** field intensity of reflection magnet of 42-cm maximum bending radius is about 1.539×10-1 T for 100 keV deuterium *** shielding cage is formed by *** the ANSOFT software,the magnetic shielding effect was estimated at about 3% at the magnet pole region.

摘要：Surface topographies such as micrometric edges and grooves have been widely used to improve neuron ***,finding the mechanism of neuron–surface interactions on grooved substrates remains a *** this work,PC12 cells and chick forebrain neurons(CFNs)were cultured on grooved and smooth polyacrylonitrile *** was found that CFNs showed a tendency of growing across groove ridges;while PC12 cells were only observed to grow in the longitudinal direction of *** further investigate these observations,a 3D physical model of axonal outgrowth was *** this model,axon shafts are simulated as elastic 3D beams,accounting for the axon outgrowth as well as the focal contacts between axons and ***,the bending direction of axon tips during groove ridge crossing is governed by the energy minimization *** physical model predicts that axonal groove ridge crossing is contributed by the bending compliance of axons,caused by lower Young’s modulus and smaller *** work will aid the understanding of the mechanisms involved in axonal alignment and elongation of neurons guided by grooved substrates,and the obtained insights can be used to enhance the design of instructive scaffolds for nerve tissue engineering and regeneration applications.

摘要：In this paper, we propose a new method to estimate the wave height of a specifi c return period based on the Hurst rule and a self-affi ne fractal formula. A detailed description of our proposed model is presented in this paper. We use the proposed model to analyze wave height data recorded along the coast of Chaolian Island from 1963 to 1989. The results show that the performance of our proposed model in estimating design wave heights is superior to traditional models.

摘要：以便理解在落叶松种植园在微地点条件和自然新生上变瘦的效果，变瘦的实验在东方辽宁省在 Qingyuan 县在 40-year-oldLarix olgensis 种植园被进行，在 2003-20 的中国(14。Fivethinning 处理(0% ， 10.2% ， 19.8% ， 29.7% 和 40.3% 变瘦) 在一样的地点上被设计。在变瘦以后，象光合的光子流动密度(PPFD ) 那样的华盖坦诚和微地点条件，土壤含水量，和土壤温度在一生长期被测量。同时，自然新生的调查在生长期的结束被进行。结果证明华盖坦诚随变瘦的 *** 和土壤温度的增加增加了，在不同土壤层的土壤含水量与在变瘦以后的华盖坦诚是确实相对的。改革树种类的丰富显著地没增加(p = 0.30 ) 自从变瘦，而是新生，在一生长期以后，树种类的密度和频率显著地增加了(p < 0.05 ) 。另外，改革树种类的数字增加了，并且增长与单个树种类的特征被相关。改革 shade-intoleranttree 种类的幼苗的增加的百分比多于阴影容忍的树种类的。在调查新生种类之中，到华盖坦诚的幼苗紧急情况的最大的反应是 Phellodendronamurense。这篇论文证实了下列结论：在变瘦以后，改革树种类的变化是有在调查落叶松种植园改革 unthinned 树和地点条件的树种类，和分发的特征的关联词是影响新生的另外的因素。

摘要：目的近年来,使用移动医疗应用程序为乳腺癌患者提供照护的实践数量日益增长。本研究旨在总结用于乳腺癌患者照护的移动医疗应用程序的现有证据,以便为后续研究提供发展方向。方法按照Arksey与O’Malley提出的范围综述方法框架,对PubMed、CINAHL和Web of science数据库中发表于2010年1月至2020年12月的相关文献开展研究,并确定符合纳入标准的研究。由2名研究员独立进行文献的筛选、提取和分析。结果共检索出676篇文章,8篇文章符合纳入标准。研究结果呈现出4个主题:患者和卫生服务保健人员在设计和开发阶段的参与、患者的偏好、患者的特点、使用移动医疗应用程序的动机。研究显示,在乳腺癌患者的照护中采用移动医疗应用程序具有良好的前景,且一系列要素在相关应用程序的设计及开发过程中需要加以考虑。结论在为乳腺癌患者开发移动医疗应用程序时应考虑患者的特征、需求和患者自我报告的健康结果数据。此外,包括患者、护士和其他重要的卫生服务保健人员在内的合作将有助于乳腺癌患者移动医疗应用程序的开发。