摘要：为在更高精度上检验等效原理,采用基于卫星平台利用空间超静环境检测等效原理的方法,结合美国斯坦福大学正在研制的sTEP卫星,将理论上对等效原理失效的检验转化为工程上可实现的物理量测量,分析了利用卫星检验等效原理必须突破的Drag-free卫星和超高精度加速度计的关键技术,研究了针对sTEP任务设计的Drag-free控制系统和超高精度加速度计的方案与分析,作为实现在10-18精度上等效原理检验的技术支撑.

摘要：全国重点文物保护单位是中国对于不可移动文物所核定的最高保护级别,具有极高的历史、艺术和科学价值。基于国务院1961、1982、1988、1996、2001、2006、2013和2019年先后八次发布的5058处全国重点文物保护单位名单,利用百度地图服务接口提取各重点文物保护单位地理坐标,获得全国重点文物保护单位的空间分布数据集。该数据集包括每个国保单位的名称、编号、分类号、时代、文物类别、批次和地址等信息。数据集以.shp和.xls格式存储,由8个数据文件组成,数据量为25.8 MB(压缩为1个文件,839 KB)。

摘要：专利集中许可是技术标准联盟推广应用技术标准的重要手段。在分析技术标准联盟专利集中许可特征及定价影响因素的基础上,提出联盟专利集中许可定价原则、设计专利集中许可定价方法与策略,旨在为技术标准联盟合理制定专利集中许可价格、加速联盟技术标准推广应用提供参考。

摘要：对建成环境"旧与新"这一主题探讨中,其一即是适应性再利用。作为设计领域中的一个组成部分,需要重新定位那些原本可能会被拆除的旧有建筑及其场地,以获得更现代、更具价值、更有意义的新设计。总体而言,发展是一件有益的事情,但几乎每天都有重要的历史遗迹、建筑以发展之名被拆除或不恰当地改变。文章着重介绍适应性再利用这一建筑设计与规划的具体附属领域中,所涉及的老旧及现有结构重构、适应与再利用相关理论、方法与实例。当处理老旧的历史建筑时,适应性再利用被置于历史保护与拆除之间。如何做明智的工作,设计师、建筑师及规划师必须理解建筑保护中的问题与着眼点,因为新的设计部分需要回应历史背景,无论是从建筑还是城市肌理的视角。

摘要：美国学院和大学校园学生住房的历史发展是与其高等教育机构的发展平行的。对于学生成长的作用一直是校园内学生住房的核心使命,但是其理念和实践已经从强烈的宗教影响之下的"代父母而行",走向世俗和教育,强调积极的生活-学习经验是大学生的全面教育和发展的一个组成部分。文章呈现了21世纪大学住房的目的、服务、组织、管理和人员的总体情况。为了反映大学学生住房设施和设计的不同方面,文章中使用了一些案例来说明从大规模居住环境走向不同类型的小型居住设施的变化,其目的仍是辅助更好的学习和人际关系发展。最后,本文提出了一些基本性的研究问题,以期引发更多的、更深入的比较研究,以及中美之间在此领域实践的交流,犹如2009国际大学院校住房官员协会组织的研究考察那样。

摘要：目前发展超超临界发电机组,虽符合可持续发展的能源和环境保护的目标,但是IGCC具高效率洁净电力,更可符合节能减排及大量制氢之多目标。本研究系针对轻型车辆以氢能为燃料的2 kW燃料电池模块进行设计、组装与测试分析,采用了符合轻型车辆需求的新式BOP组件及二次电池辅助系统。为节省氢气损耗,通过强韧控制理论控制氢气流量的变化来达成将电压控制在一特定值的目标,使电池堆的开路电压约为56 V;而当负载在65 A(高负载)时,电压降至37 V。在二次电池方面,本研究则针对不同种类之二次电池进行比较选择,并开发其充电及放电之电力回路、控制逻辑及流程。最后,本研究将2 kW燃料电池模块结合1.5 kW磷酸锂铁二次电池安装于一堆高机(3.5 kW)中,进行动力系统实车测试。

摘要：介绍了隔条导向装置研制的必要性、设计过程、生产试验及结果．生产试验证明：该装置结构简单，性能可靠，减少了顺弯，缩短了干燥周期．

摘要：With the recent advancement in nanotechnology,nanoparticles(NPs)offer an ample variety of smart functions than conventional materials in various *** compared to larger particles,NPs possess unique characteristics and excellent abilities,such as low toxicity,chemical stability,surface functionality,and *** advantageous properties allow them to be widely utilized in many applications,including biomedical applications,energy applications,IT applications,and industrial *** order to fulfill the increasing demands of NP applications,existing NP synthesis methods need to be improved based on the requirements of different applications to further their usage.A comprehensive understanding of the relationships between synthesis parameters and properties of NPs can help us better fine-tune them with designed properties and minimal *** review paper will discuss the commonly used synthesis methods of functionalized NPs,as well as future directions and challenges to develop various synthesis methods further.

摘要：Abstract Meniscus injury is a common disease in *** it was not treated in time,it leads to osteoarthritis which brings unbearable pain and heavy economic burden to the *** present,meniscectomy and meniscus suture are widely used in the treatment for meniscus ***,It is not ideal for poor self-healing ability of *** recruitment of endogenous stem cells is an attractive option for wounded meniscus *** reduced high-mobility group box 1 protein(HMGB1)can accelerate the regeneration of multiple tissues by endogenous stem cell activation,migration and ***(KGN)has shown to induce the chondrogenesis of the stem ***,no study has explored such effects of HMGB1 and KGN in wounded meniscus ***,in order to improve the regeneration of meniscus,we intend to use a novel bioactive microsphere which was developed by combining fully reduced high mobility group box 1(frHMGB1)and kartogenin(KGN)with alginate gel which slowly release high concentrations of HMGB1 and KGN to activate rat bone marrow stem cells(BMsCs)and promote cell *** results showed that this HMGB1–KGN microsphere released and kept high concentrations of HMGB1 and KGN in the wound area for more than 2 *** vitro experimental results showed that the HMGB1–KGN microsphere can promote cell proliferation via recruiting rat bone marrow stem cells(BMsCs)and activating the BMsCs from G_(0) to G_(Alert) stage as evidenced by cell migration testing and 5-bromo-2′-deoxyuridine(BrdU)incorporation *** vivo results indicated that this HMGB-KGN microsphere can recruit GFP-labeled BMsCs from tail vein to wounded meniscus and induce these GFP-labeled BMsCs to differentiate into *** results demonstrated that the HMGB1–KGN-containing bioactive microsphere induced cell migration in vitro and recruited the cells to wound area to promote wounded rat meniscus healing in vivo.

摘要：Cardiovascular diseases are the leading cause of morbidity and mortality throughout the world underlining the importance of efficient treatments including disease modeling and drug discovery by cardiac tissue ***,the predictive power of these applications is currently limited by the immature state of the ***,we developed gelatin hydrogels chemically crosslinked by genipin,a biocompatible crosslinker,as cell culture *** rat cardiomyocytes appear synchronous beatingwithin 2 days after seeding on ***,we applied the electrical stimulation as a conditioning treatment to promote the maturation of cardiomyocytes cultured on the *** results show that electrical stimulation improves the organization of sarcomeres,establishment of gap junctions,calcium-handling capacity and propagation of pacing signals,thereby,increase the beating velocity of cardiomyocytes and responsiveness to external *** above system can be applied in promoting physiological function maturation of engineered cardiac tissues,exhibiting promising applications in cardiac tissue engineering and drug screening.