摘要：为进一步提高水轮机的调节性能和控制精度,针对水轮机调节系统提出了一种基于线性矩阵不等式(LMI)的扰动观测状态反馈控制策略。首先,对水轮机调节系统进行了建模,并设计了一种基于LMI的扰动观测状态反馈控制策略,该策略综合考虑了水轮机的运行状态及扰动观测值;然后通过LMI完成了该控制器的设计与分析;最后,为了验证所提控制策略的有效性和鲁棒性,通过仿真试验进行了测试。结果表明,与传统的控制方法相比,该扰动观测状态反馈控制策略可有效提高水轮机调节系统的响应速度、准确性和稳定性,且降低了系统对扰动的敏感性。

摘要：以深中通道沉管隧道为例,针对沉管隧道最终接头横向贯通精度极高的要求,充分利用施工现场地形条件和隧道内部空间结构,对隧道洞内外平面控制网进行优化设计和横向贯通误差模拟计算,在左、右行车道和中廊道分别布设一套导线网,并相互连接,形成隧道多线形联合锁网贯通测量方法,实现了沉管隧道最终接头的精准合龙贯通。

摘要：目的制备阿昔替尼胃漂浮丸剂,延长其在胃肠道滞留时间,提高其口服生物利用度。方法采用挤出滚圆法,分别以羟丙基甲基纤维素(HPMC)、羟丙基纤维素(HPC)为粘附阻滞材料,以碳酸氢钠(NaHCO3)为起泡剂,制备阿昔替尼胃漂浮丸剂。结果以主药∶HPMC K100M∶HPC(2.5∶1∶5),主药∶起泡剂(1∶2)设计的处方,2 h释放达37%,4 h释放达67%,6 h释放达80%。大鼠药代动力学研究结果表明,胃漂浮丸剂生物利用度提高2.39倍,Cmax提高80%。结论阿昔替尼生物粘附漂浮丸剂具有显著的缓释效果,可延长药物在体内的滞留时间,提高阿昔替尼在大鼠体内的口服生物利用度。

摘要：Faraday pseudocapacitors take both advantages of secondary battery with high energy density and supercapacitors with high power density,and electrode material is the key to determine the performance of Faraday *** metal oxides and nitrides,as the two main kinds of pseudocapacitor electrode materials,can enhance energy density while maintaining high power *** advances in designing nanostructured architectures and preparing composites with high specific surface areas based on transition metal oxides and nitrides,including ruthenium oxides,nickel oxides,manganese oxides,vanadium oxides,cobalt oxides,iridium oxides,titanium nitrides,vanadium nitrides,molybdenum nitrides and niobium nitrides,are addressed,which would provide important significances for deep researches on pseudocapacitor electrode materials.

摘要：传统无人机电池的能量密度有限,限制了其飞行时间,激光供能系统可以延长无人机的续航能力。提出轻型多旋翼无人机激光供能接收阵列和扩束准直系统的优化设计方法,通过Matlab和Simulink联合仿真,对激光供能系统的传输功率损耗进行量化分析,将激光传能过程中的光伏阵列设计半径和初始光斑束腰半径的比值定义为缩放因子,将总传能效率细化为大气传输效率、截断效率、高斯填充效率和光电转换效率。以悬停姿态下的轻型多旋翼无人机为基础工况,进行详细的设计计算。结果显示,在给定光伏阵列设计半径和传输距离时,缩放因子存在最优值,光伏阵列设计半径对远距离传能效率有较大影响,随着传能距离的增加,截断效率下降成为主导因素。

摘要：转子作为罗茨泵的关键零部件之一,对产品的整机性能具有重要影响,而转子设计的核心是转子型线的设计。本文以腰部椭圆线为基础开展转子型线设计,转子位于节圆内的型线由椭圆线构成,位于节圆外的型线由椭圆线的共轭曲线组成。设计中首先确定位于腰部的椭圆线及其啮合角,然后应用两个转子间的啮合关系,分析求解型线位于节圆外的共轭曲线,从而获得整个转子型线。最后,设计了抽速为70 L/s的罗茨泵转子,并分析了转子容积利用率与独立可变参数的关系。该型线与顶部为椭圆线的转子型线相比,容积利用率可大于50%,优势明显。

摘要：针对我国现阶段绿色建筑的评价体系尚未完善的问题,对国际性绿色建筑评价标准LEED V4和我国的GB/T 50378—2019《绿色建筑评价标准》进行了比较分析,结果表明,GB/T 50378—2019《绿色建筑评价标准》注重均衡评价,而国际性绿色建筑评价标准LEED V4侧重能源指标,但是两种体系均体现了节能环保的理念。

摘要：本文研究了后处理工艺对300M钢表面离子镀铝层的形貌和耐蚀性的影响,并探究离子镀铝及后处理工艺对合金钢氢脆性能的影响。研究结果表明,喷丸处理可以提高铝镀层的致密度,但单一的喷丸处理对铝镀层耐蚀性没有明显提升;化学氧化处理可使铝镀层表面转化为耐蚀性较好的铬酸盐转化膜,显著提高铝镀层的耐蚀性;真空离子镀铝及后处理工艺不会对合金钢产生氢脆的影响。

摘要：热等静压设备液压系统是保证设备装出料过程的重要系统之一,同时也是上、下塞装置密封件和易损件日常维护、保养的重要保障,其性能的好坏直接影响设备的安全和运行效率。以某型热等静压设备液压系统为例,依据多套液压系统设计经验,总结了液压系统常见故障,分析了故障发生原因,提出了解决办法,并有针对性地制定了日常维护、保养措施。

摘要：Background： The specialty of allergy developed quickly in western countries because of the rapid increase of allergic diseases, whereas it developed relatively slowly in China. The prevalence of allergen sensitization and allergic diseases in Zhejiang Province of China is high and improving the medical services for these diseases is critically needed. Objective： To investigate the working status of the diagnosis and treatment of allergic diseases, including doctor resources, diagnostic methods, and allergen-specific immunotherapy in patients of Zhejiang Province, and to provide instructions for the strategic development of subspecialties of allergic diseases. Methods： First we defined the doctors who treat allergic diseases, and designed a comprehensive questionnaire to collect personal and hospital information for these doctors. The questionnaires were distributed to hospitals with different ranks and from different areas in the province. The general condition of doctor＇s resources, carryout of diagnostic methods, and allergen-specific immunotherapy were described and variations in the different specialties, hospitals, and areas were further analyzed. Results： Doctors in their thirties with bachelor＇s degrees were the mainstream for diagnosing and treating allergic diseases. The main specialties of the doctor resources were the specialties of Ear, Nose and Throat（ENT）, Respirology, Pediatrics, and Dermatology. The Pediatrics specialty had a more reasonable infrastructure of doctor resources with more young doctors working in this subspecialty. The development of allergy subspecialty varied within hospitals at different levels or from different areas. The carryout of the skin prick test（SPT）, serum specific Ig E（ss Ig E）, and subcutaneous immunotherapy（SCIT） was best performed in provincial hospitals, while sublingual immunotherapy（SLIT） was prescribed most commonly in municipal hospitals. The performance of SPT and ss Ig E in Hangzhou, Jiaxing, and Wenzhou areas wa