摘要：Menisci are fundamental fibrocartilaginous organs in knee joints. The injury in meniscus can impair normal knee function and predisposes patients to osteoarthritis. This study prepared decellularized meniscus scaffolds using a 1% （w/w） sodium dodecyl sulfate solution and sufficient rinsing steps. Complete cell removal was verified by hematoxylin and eosin staining and DNA content assay. Decellularized menisci had accordant tension properties to intact ones, but with declined compression properties. This occurred because the collagen fiber was not damaged but glycosami- noglycans was significantly lost during the decellularization process, which was confirmed by biochemical assay and histology staining. In vitro cytotoxicity assay demonstrated that decellularized meniscus scaffolds have no toxicity on L929 murine fibroblasts and porcine chondrocytes. Further experiment showed that porcine chondrocytes could adhere and proliferate on the scaffold surface, and some cells even could infiltrate into the scaffold. All results showed the potential of this decellularized meniscus to be the scaffolds in tissue engineering.

摘要：A convenient,expeditious,and high-efficiency protocol for the transformation of alcohols into esters using a Co-modified N-doped mesoporous carbon material（Co-N/m-C）as the catalyst is *** catalyst was prepared through direct pyrolysis of a macromolecular *** catalyst prepared using a pyrolysis temperature of 900°C（labeled Co-N/m-C-900） exhibited the best *** strong coordination between the ultra-dispersed cobalt species and the pyridine nitrogen as well as the large area of the mesoporous surface resulted in a high turnover frequencymethyl *** value is much higher than those of state-of-the-art transition-metal-based nanocatalysts reported in the ***,the catalyst exhibited general applicability to various structurally diverse alcohols,including benzylic,allylic,and heterocyclic alcohols,achieving the target esters in high *** addition,a preliminary evaluation revealed that Co-N/m-C-900 can be used six times without significant activity *** general,the process was rapid,simple,and cost-effective.

摘要：We describe the footprint and input catalog for bright nights in the LAMOST Pilot Survey, which began in October 2011. Targets are selected from two stripes in the north and south Galactic Cap regions, centered at δ = 29°, with 10° width in declination, covering right ascensions of 135° to 290° and -30° to 30° re- spectively. We selected spectroscopic targets from a combination of the SDSS and 2MASS point source catalogs. The catalog of stars defining the field centers （as re- quired by the Shack-Hartmann wavefront sensor at the center of the LAMOST field） consists of all V 〈 8m stars from the Hipparcos catalog. We employ a statistical selection algorithm that assigns priorities to targets based on their positions in mul- tidimensional color/magnitude space. This scheme overemphasizes rare objects and de-emphasizes more populated regions of magnitude and color phase space, while en- suring a smooth, well-understood selection function. A demonstration of plate design is presented based on the Shack-Hartmann star catalog and an input catalog that was generated by our target selection routines.

摘要：介绍了设计的概念、分类,对设计的功能进行了叙述,着重讨论了设计中的人性化内涵,指出充分体现人性化内涵的设计才是未来设计的发展方向。

摘要：目的分析辽宁省农村公路沥青路面病害特征,研究农村公路沥青路面结构设计指标,提出典型路面结构.方法针对农村公路沥青混凝土路面出现的各种病害进行调查分析,总结出对应于不同类型、不同程度病害产生的原因.结合半刚性基层沥青混凝土路面的力学特性和目前提出的多指标控制沥青路面结构设计的思想,提出适应于农村公路沥青路面的结构设计指标.应用所提出的指标进行分析,结合经济因素,提出不同交通等级下的典型路面结构.结果当基层模量衰变至小于300 MPa,基层材料处于松散状态时,面层层底产生拉应力,路表弯沉增加幅度显著.当提出的典型路面结构基层模量为900 MPa时,通过加大基层厚度很难实现特重交通的承载能力要求.结论辽宁地区农村公路沥青路面设计指标采用设计弯沉值和基层层底拉应力.考虑冬季低温的影响,验算沥青面层低温抗裂这一指标.

摘要：艺术设计专业的实质就是创造,专业特性使其需要不断的更新。应特别加强造型基础课的准确定位和课时比重,并加强学生的造型能力、基本技能的训练,培养学生眼、脑、手三位一体的协作与配合的能力训练。应打破传统教学中“教”与“学”的惯用模式,要以学生为教学的主体,引导学生自己学习,锻炼他们独立思考的能力和独立研究的能力。

摘要：针对固定门限方法在语音端点检测技术中的局限性,为了提高低信噪比下语音端点检测的鲁棒性和准确率,将自适应门限应用于分形维数的语音检测中,提出了一种新的语音端点检测算法.该算法通过对语音信号产生机制的分析,将分形维数用于语音起止点的检测中,设计了自适应门限,从而有效降低了噪声干扰对检测结果的影响,并实现了实时检测.仿真实验结果表明,在低信噪比的情况下,改进的端点检测算法比传统的短时能量检测算法可更准确有效地实现带噪语音的端点检测,而且对噪声干扰具有更好的鲁棒性.

摘要：】智能型超声功率计的设计采用了超声辐射压力法,应用荷重传感器进行压力测量。该超声功率计的主要性能为:最大被测超声换能器辐射面直径可达133mm,最大可测超声功率为999-9W,理论分辨率为0-3W。

摘要：针对炭阳极生产工艺中罐式炉顶人工加料的不足,提出了一种罐式炉顶皮带自动加料系统的设计方案.本方案设一套PLC控制系统,采用条码定位系统和行程开关检测实现加料小车运行位置的精准采集,采用变频电机实现加料小车运行速率的自动调节,进而实现了对加料小车的集中控制.皮带自动加料系统有效的降低了操作人员的工作强度,提高了工作效率,提升了罐式炉加料系统的可靠性.

摘要：以180~300 km超低轨卫星为研究对象,采用自由分子流模拟方法中可准确模拟三维复杂外形的直接模拟蒙特卡洛(DSMC)法研究了典型外形的气动阻力特性.通过不同速度率条件下圆球和平板的理论阻力系数及不同速度率下70°钝体外形的气动实验数据与DSMC计算结果的比较,验证了三维DSMC方法对外形和网格的适应性.针对几类典型的卫星外形的阻力特性进行了计算比较,得出压差阻力、剪切阻力、总阻力及无量纲阻力系数随高度和外形的变化特性.超低轨卫星通过外形的优化设计可降低阻力约10%,能够有效改善其在轨运行特性,且可降低对卫星自身相关系统的设计需求.