摘要：Metal-N_(4)(M-N_(4))macrocyclic complexes are interesting electrocatalysts due to their well-defined structures and rich molecular *** them,metal phthalocyanines have been widely studied for the carbon dioxide reduction reaction(CO_(2)RR)in heterogeneous systems and demonstrated good electrocatalytic ***,other complexes like metal corroles and metal porphyrins are much less explored,and often show inferior *** this study,three cobalt macrocyclic complexes,cobalt phthalocyanine,cobalt meso-tetraphenylporphyrin,and cobalt meso-triphenylcorrole(CoPc,CoTPP and CoTPC)are investigated in heterogeneous electrocatalysis of CO_(2)*** CoPc/carbon nanotube(CNT)hybrid exhibits high electrocatalytic activity,CNT hybridization does not work for CoTPC and CoTPP that hold weak interactions with *** the drop-dry method with a high molecular loading of 5.4×10^(–7) mol cm^(–2),CoTPC and CoTPP could deliver appreciable electrode ***(4-vinylpyridine)(PVP)introduction is further demonstrated as a facile method to afford enhanced activities for CoTPP at low molecular loadings through enhancing molecule-substrate *** partial current density of carbon monoxide for CoTPP+CNT/PVP is around 8 times higher than the sample without PVP at–0.67 V versus reversible hydrogen *** work provides solutions to enhance the electrode activities of molecular electrocatalysts with weak substrate interactions in heterogeneous systems.

摘要：For the surgical treatment of cardiovascular disease(CVD),there is a clear and unmet need in developing small-diameter(diameter<6 mm)vascular *** our previous work,sulfated silk fibroin(SF)was successfully fabricated as a potential candidate for preparing vascular grafts due to the great cytocompatibility and ***,vascular graft with single layer is difficult to adapt to the complex internal *** this work,polycaprolactone(PCL)and sulfated SF were used to fabricate bilayer vascular graft(BLVG)to mimic the structure of natural blood *** enhance the biological activity of BLVG,nicorandil(NIC),an FDA-approved drug with multi-bioactivity,was loaded in the BLVG to fabricate NIC-loaded *** morphology,chemical composition and mechanical properties of NIC-loaded BLVG were *** results showed that the bilayer structure of NIC-loaded BLVG endowed the graft with a biphasic drug release *** in vitro studies indicated that NIC-loaded BLVG could significantly increase the proliferation,migration and antioxidation capability of endothelial cells(ECs).Moreover,we found that the potential biological mechanism was the activation of PI3K/AKT/eNOS signaling ***,the results effectively demonstrated that NIC-loaded BLVG had a promising in vitro performance as a functional small-diameter vascular graft.

摘要：全寿命周期中,在役平台长期遭受恶劣海况影响,牺牲阳极保护系统难以维持预期防护效果,对在役平台提出快速修复方案十分必要。针对南海海域某试验平台,建立了1/8缩比模型。通过控制缩比模型与裸钢板之间的电连接进行涂层破损模拟。基于外加电流阴极保护法设计了一种快速修复装置。采用数值模拟计算方法确立了装置的最佳布放方案。在小平岛海域进行了实海试验验证。结果表明:快速修复装置可有效针对在役平台涂层破损问题进行快速修复,数值模拟计算方法在快速修复方案设计中具有可靠性及准确性。

摘要：本文针对某型机载吊舱环控系统TTC(制冷涡轮-动力涡轮-压缩涡轮形式)涡轮冷却器的油污染、可靠性低等使用问题,采用箔片动压气浮轴承对涡轮冷却器进行升级,优化设计了涡轮冷却器的气动性能和启动特性,在地面状态下当引气压力达到8 kPa时即可实现涡轮冷却器启动运行。基于电子吊舱飞行工况条件对环控系统进行了高空负压模拟试验,试验结果表明采用气浮轴承支承的涡轮冷却器空气流量和制冷量随飞行马赫数增加而提升,装备了该涡轮冷却器的环控系统制冷量随飞行高度增加过程中存在极值点,与传统滚动轴承涡轮冷却器性能一致,表明搭载箔片动压气浮轴承的TTC涡轮冷却器能够满足机载工程化应用要求。

摘要：结合数值模拟方法和叉排逆流式换热器的工程算法,针对航空用列管式换热器提出了一种性能校核方法。为获得更精确的叉排最大流速,采用Fluent对冷热侧流场进行了分析,并通过一组迭代估算了冷热侧的压差使出口压力边界条件得以确定。数值计算得到的冷热侧流速作为工程算法的输入条件进行后续计算。通过与试验对比发现,该方法可完成对列管式换热器的设计校核,计算结果与实验数据间的误差在工程应用允许范围内。

摘要：对机器人体系结构、动作学习及行为的组织方式进行了研究,以演化计算为基本方法,以RoboCup2D为平台,设计了基于PSO算法的足球机器人的体系结构,解决感知、动作、和规划问题;在训练环境下,形成感知规则,优化感知相关参数,得到对信息高效快速的感知方法,并根据指定的粒度、功能、参数,对RoboCup2D机器人的原子动作进行了组合优化,得到一组带参数和执行效果描述的粒子动作;最后在赛场环境和任务驱动下,搜索粒子动作并进行组织规划,得到完成特定任务的机器人行为;RoboCup2D仿真实验表明,演化计算方法不仅能利用原子动作进行组合优化,得到适应于不同条件的粒子动作,而且能通过其在线搜索粒子动作,动态组成机器人行为;基于演化计算的足球机器人能更好地完成跑位、截球、带球、传球等任务,具有更强的适应性。

摘要：材料消耗定额是机械制造企业生产管理中的一项重要技术经济指标,是企业有计划按比例制定原材料生产计划、合理分配原材料的依据之一,同时也是物资采购、仓储供应、经济核算和成本管理的重要数据来源。对机械制造企业中一般性原材料消耗定额管理进行深化设计和应用研究,在普通的材料牌号、规格、技术条件、供应状态、精度等级和工艺消耗定额量等信息基础上,增加材料性能分类控制的物资分类方法、工艺及生产试销率和废品率等功能信息,从产品特点、内容设计和功能应用等方面进行延伸,可全面提高材料定额管理工作的数字化和规范化应用的水平。

摘要：为了解决筒形件复杂孔系的加工问题,对其进行了数控机床加工和采用专用工艺装备在普通钻床上加工工艺方法的试验研究和生产应用。结果表明,数控加工具有适应性强、能及时解决产品加工试制急需的优点,但存在孔系加工精度不够、产品装配互换性不良的问题;设计制造专用夹具后在普通钻床上进行复杂孔系的加工,可以确保孔系的加工精度和产品装配的互换性,提高产品质量,提高孔系加工和产品装配的工作效率,显著降低生产成本。数控机床与普通机床加工方法各有其特点,应根据产品的类型、生产批量、质量要求、经济性、以及数控机床加工与普通机床加工各自的特点,合理选取加工方法和设备。