工业设计与移动梦想

从移动设计的相关因素、移动设计与人、移动设计与技术、移动设计与环境等方面阐述了移动设计的涵义。简要地介绍了工业未来设计新理念及如何通过设计手段延长产品寿命。工业设计所要研究的正是如何通过它的巨大的推动力来满足人们实现移动的梦想,并使这个梦想变的绚烂多彩。     

张江创新园超限高层两种计算的比较

张江创新园三幢高层均有不规则超限情况。针对超限高层在设计中的计算问题探讨。通过计算分析和两种计算结果比较,尽力消除结构设计隐患,提高结构抗震安全性。     

气态水诱发高速铁路路基冻胀的潜在机理研究

针对我国严寒地区高速铁路路基中冻胀不敏感性粗颗粒填料大范围冻胀的现象,基于所提出的非饱和冻土水热耦合模型,阐述了气态水迁移成冰作用诱发非饱和路基冻胀的机理。结果表明:不考虑气态水迁移成冰作用时,产生的冻胀量几乎为0,而考虑气态水迁移成冰作用时,产生18.4 mm的冻胀,与实测值大致相同,且冻胀量与实测曲线吻合较好,冻结深度与哈大高速铁路路基四平段的实测值曲线吻合也较好,说明本文机理能够较好地解释上述冻胀现象发生的原因;与其他三种不同冻胀诱发机理的对比分析表明,严寒地区高速铁路路基冻胀是路基细粒含量、降水、地下水位等多种因素共同作用的结果,占据主导作用的因素需视具体工程情况判定。     

侧推孔球状气泡逸出轨迹及振动初探(英文)

In an atrocious ocean environment,the lateral propulsion hole could potentially be partly out of water and capture an air cavity.Bubbles would form when the captured air cavity escapes underwater and they may affect the performance of the sonar.The common commercial computational fluid dynamics software CFX was adopted to calculate the ambient flow field around the lateral propulsion hole generated by a moving vessel.The oscillation of the spherical bubble was based on the Rayleigh-Plesset equation and its migration was modeled using the momentum equation.The radiated noise of the oscillating bubble was also studied.The aim is that the results from this paper would provide some insight into corresponding fluid and acoustic study.     

内皮素-1和干细胞因子对黑素细胞黏附和迁移影响的对照研究

目的　体外研究内皮素 1(endothelin 1,ET 1)和干细胞因子 (stemcellfactor,SCF)对黑素细胞黏附和迁移的影响。方法　分别用ET 1和SCF处理人表皮纯化培养的黑素细胞 ,观察其在纤维连接素包裹的培养板上黏附以及通过微孔滤膜的情况 ,并作对照比较。结果　与SCF处理相比 ,ET 1处理的黑素细胞易黏附于培养板和通过微孔滤膜 ,尤其是当其浓度在 32nmol·L-1时 ;当浓度≥ 12 8nmol·L-1时 ,对黑素细胞的黏附和迁移却呈现抑制作用 (P <0 .0 1)。通过对黑素细胞的迁移观察 ,发现ET 1的浓度≥ 2nmol·L-1时 ,均对黑素细胞迁移呈促进作用 ,这种作用强于SCF处理的黑素细胞 (P <0 .0 1) ,并随其浓度增加而增强。结论　ET 1可以促进黑素细胞的黏附和迁移 ,其效果优于SCF。     

上海跨国迁移与流动人口的实证研究——以在沪日本人和赴日返沪人员为例

经济全球化推动了人们生产和生活方式、社会关系、文化模式的发展变迁，也使跨国迁移成为越来越频繁的“常态”。本文通过大量的数据和调查资料，以在沪日本和赴日返沪人员为例，对其历史沿革、人口结构、入出境事由、迁移类型和迁移方式、社会支持网络等问题进行了实证研究，并对二者的异同点进行了初步探讨。     

沥青路面车辙处沥青迁移规律及其粘弹性力学机理

现场车辙调查表明,路面车辙一般集中在行车道轮迹处,超车道和停车道基本没有车辙,而且车辙较深的路段通常沿车辙带分布着带状泛油.在车辙槽处和停车道上钻心取样,对不同面层的混合料进行对比抽提试验.抽提试验结果显示车辙处沥青产生自下往上的迁移:上面层混合料的油石比增大,中、下面层混合料的油.石比减小.运用非线性粘弹性力学原理解释了沥青迁移的机理,即行车荷载下路面结构产生了剪应力,而剪切应力会产生法向应力.导致沥青材料沿剪切应力的法向产生流动.最后,探讨了减轻沥青迁移的技术措施.     

Krill behaviour as recorded by acoustic doppler current profilers in the Gullmarsfjord

Vertical distribution of sound scattering layers were observed using bottom deployed acoustic doppler current profilers (ADCP) during early spring of 1996 and autumn of 1997 in the Gullmarsfjord on the Swedish west coast. Variations in relative backscatter were interpreted in relation to horizontal water velocities, oxygen saturation as well as differences in the light, salinity and temperature regimes. Net catches revealed that much of the backscatter below 20-m depth was associated with the presence of krill, principally Meganyctiphanes norvegica.Horizontal currents seemed to influence the migration and distribution of krill, which showed weak vertical migration patterns with low abundance during periods of strong intermediate in- and outflows, while during periods with weaker currents, a more regular diel migration occurred. Horizontal water velocities >5 cm s⁻¹ seemed to have the potential to decrease the peak in the backscatter profile. Mean vertical migration rates of krill was 1 cm s⁻¹, while maximum vertical migration rates were estimated to be 2.5–3 cm s⁻¹. The range of the vertical migration was different in 1997 due to severe oxygen deficiency in the bottom water, which prevented the krill from descending >80 m. The commencement of vertical migration correlated closely to the seasonal light conditions. The descent was immediately triggered by sunrise, while ascent occurred with a delay of about 1 h at sunset.     

高桩码头钢筋混凝土结构延寿技术现场试验研究

结合现场试验,阐述了高桩码头延寿技术的技术原理和施工工艺。结果表明,该技术可有效脱除混凝土内的氯离子并使有效阻锈剂基团快速渗人到混凝土内部,使钢筋恢复钝化而停止腐蚀,从而显著延长码头使用寿命。     

基于微服务架构的铁路多云管理应用实践探索

提出多云管理平台的概念和体系架构,结合铁路企业多云管理的特点和要求,梳理微服务平台参考模型及其能力要求.如何协调和处理好多云管理实践中3大关键因素间的关系,决定企业多云管理的成败,最后对典型场景云迁移举例阐述,并对应用成效进行总结.多云管理实践有效的推动企业信息基础设施资源管理的标准化,提升企业信息化和智能化管理效率.