摘要：Recently,Kelly and colleagues[1],inspired by computed tomography(CT),report a“volumetric additive manufacturing”technology via a computed axial lithography(CAL)approach.A related US patent application[2]has also been *** cumulative light exposure solidifies the material in the target area,while the other area remains uncured,resulting in only specific points in the designed 3D objects being *** technology significantly improves the capability of the digital light processing(DLP)***,the lithography approach based on a similar algorithm was already proposed by Xiang Wu in a patent(application ***/CN2016/080097)in 2016[3].

摘要：We present an example of applying'need-driven'product design principle to the development of a rapid test kit to detect SARS-COV-2(COVID-19).The tests are intended for use in the field and,longer term,for home *** detect whether a subject is currently infected with the virus and is *** urgent need for large numbers of tests in field setting imposes constraints such as short test time and lack of access to specialist equipment,laboratories and skilled technicians to perform the test and interpret *** meet these needs,an antigen test based on RT-LAMP with colorimetric readout was *** use of swab sample with no RNA extraction was *** extensive experimental study(reported elsewhere),a rapid test kit has been fabricated to satisfy all design criteria.

摘要：When we were asked to consider to launch this new journal, the first question was why？ There are so many journals now, why we need to launch another one？ When we said ‘yes＇, we have decided to make this journal unique. This is not just another one, this is ‘Bio-Design and Manufacturing （BDM）＇.

摘要：OverviewThe Research Lab on 3D Bioprinting of Zhejiang University focuses on developing innovative 3D bioprinting equipment and technology for healthcare and biomedical applications, since founded in 2017. To further enhance the international collaboration, a joint international research lab on 3D bioprinting of Zhejiang University and University of Oxford was set up. The lab is based on the State Key Laboratory of Fluid Power and Mechatronic Systems and the Oxford Centre for Tissue Engineering and Bioprocessing. The aim of the lab is to establish a world class research and development platform on 3D bioprinting. The lab has extensive and close collaborations with University of Oxford, University College London and multidisciplinary partners of Zhejiang University.

摘要：Three-dimensional （3D） printing is a novel promising technology based on 3D imaging and layer-by-layer additive fabrication. It has a profound influence on all aspects of our lives and is playing an increasing important role in many areas including engineering, manufacturing, art, education and medicine. ＂3D bioprinting＂ has been put forward with the technical progress in 3D printing and might be a possible way to solve the serious problem of human organ shortage in tissue engineering and regenerative medicine. Many research groups flung them into this area and have already made some gratifying achievements. However, it is a long way to fabricate a live organ. Many elements lead to the limitation of 3D bioprinting. This review introduces the background and development history of 3D bioprinting, compares different approaches of 3D bioprinting and illustrates the key factors of the printing process. Meanwhile, this review also points out existing challenges of 3D bioprinting and has a great prospect. Some points proposed in this review might be served as reference for the research of this field.

摘要：农村集体经济组织在乡村治理中发挥着至关重要的作用。十八大以来伴随农村集体产权制度改革持续推进,村集体经济组织的活力逐步释放。改革后的农村集体资产如何运营,相关部门在机制设计方面尚未作出统一规划。事实表明,得益于政府的扶持,农村集体净资产快速增长,一定程度上掩盖了发展不合理的各种问题。农村集体经济组织普遍由村委会代管的情形下,因“政经不分”导致的内外部监督双重失效现象仍较普遍,集体资产优化配置问题仍未从根本上得以解决。实现“政经分离”是农村集体资产持续增收的重要制度性前提。农村集体经济组织缺少资金、技术、人才和制度优势,引入公司制与法人制是提高其经营效率的重要途径,但要预防资本侵入风险,在农村集体经济组织、村委会、合作社、企业、村民等多方主体参与的监督与制约环境中构建新型农村集体经济的运营机制。

摘要：设计了气动播种机工作状态参数的两种显示方式,即图形图标和柱状图标显示方式,通过实验来比较两种显示方式的识别效果。结果表明,图形图标和柱状图标的平均识别时间分别为2.10和2.26s。在7个工作参数中,播种深度、风扇转速、车速和种子量这4个参数的图形图标显示比柱状图标显示的平均识别时间短,平均差值是0.36s;而播种率、畅通性和犁刀压力的柱状图标显示比图形图标显示的识别时间短,平均差值是0.10 s。两种显示方式在3个阶段的识别过程中平均识别时间和识别错误量都逐步下降,柱状图标识别时间比图形图标识别时间下降得快,且柱状图标识别错误量的下降比图形图标识别错误量的下降更明显。

摘要：针对镀锌机组极限薄规格家电板生产过程中产生的擦划伤缺陷问题,系统分析了划伤产生的机理,影响划伤缺陷的因素,并从设备安装精度、设备选型和工艺参数控制3方面提出了行之有效的改进措施,擦划伤缺陷得到了明显控制。

摘要：测井仪器在钻杆传输测井施工中容易损伤,因而设计安装相应的保护装置对仪器加以保护。根据测井仪器特点分别设计了1515HDIL阵列感应保护套,XMAC交叉偶极子声波、数字声波扶正器,2228岩性密度探头保护器,钻杆起降缓冲装置。这些保护措施的应用在钻杆传输测井施工中对仪器设备起到了很好的保护作用。

摘要：以乌鲁瓦提砂砾石面板堆石坝为例,分析砂砾石面板坝在考虑流变和不考虑流变情况下坝体在竣工期和蓄水期的位移和应力分布规律,总结流变效应对坝体应力和变形的影响。计算结果表明:计入流变影响后坝体竖向位移和水平位移较未计入流变效应结果都有所增大,大主应力和小主应力也有所增加;从坝体沉降历时曲线和流变附加节点荷载计算结果可以看出,砂砾石料的变形主要在施工期完成,在蓄水后一年流变变形基本结束坝体位移趋于稳定,且计入流变的计算结果与坝体实际检测结果相近。因此,在进行砂砾石面板堆石坝坝体应力变形计算时考虑砂砾石的流变效应是必要的。