泡沫玻璃生产工艺绿色化改造探索

改造的背景1.国家高质量发展的要求进入新时代,我国社会经济的发展已经从高速增长逐步转型为高质量的提升。泡沫玻璃生产企业应响应国家号召,积极从事科技创新驱动,将泡沫玻璃的发展模式从规模的壮大改变为质量的提升。2.国家对环境治理要求的不断提高绿水青山就是金山银山。     

国产离子膜DF988运行总结

介绍了国产离子膜安装和运行过程的关键点,并与同期进口离子膜运行数据进行对比,说明国产离子膜DF988的设计性能参数可以满足30DD350槽型的苛刻要求。经过17个月的实际运行考核,证明了国产离子膜运行数据优于同类型进口离子膜性能水平。     

基于遗传算法优化BP神经网络的液压系统故障诊断

液压系统作为控制和动力传输设备的核心部件,在现代工业生产机械中被广泛应用,准确诊断其故障具有提高生产效率和保障工作安全性等重要的工程意义。液压系统一旦发生故障往往是多故障同时出现,传统BP神经网络故障诊断算法往往不能满足多故障诊断准确率,提出一种基于遗传算法改进BP神经网络（GA-BP）的液压系统故障诊断方法,针对不同采样频率下多传感器信息融合的液压系统3种典型的故障模式进行对比分析。结果表明：GA-BP故障诊断算法相对于传统的BP神经网络具有更好的诊断性能。     

基于LABVIEW的电液伺服测控系统设计

介绍了一种基于虚拟仪器的电液伺服测控系统。该系统不仅具有参数的测试功能和数据处理功能,而且具有智能控制功能,实现了电液伺服系统的测控自动化。试验结果验证了该系统的合理性。     

青海托拉海冲洪积扇区水文地质及水质分析

研究区位于沙松乌拉山前托拉海冲洪积扇区,区内沉积了厚度较大的第四系松散沉积物,其岩性主要为卵砾石、砂砾石及砂层。含水层厚度大于50 m,为赋存地下水提供了良好的空间场所。该区因降水稀少,蒸发量大,松散岩类孔隙水主要接受托拉海河水的下渗补给,主要河水补给来源于托拉海东沟、西沟,其中托拉海西沟年平均流量较小。洪积扇中前部地区地下水位埋深一般为20~65 m,水量较丰富,水质较好。     

Research on Solar Simulation System for Test of Solar Radiation Measuring Instrument

Since traditional solar simulators are mainly applied to spacecraft and photovoltaic industry, they are not suitable for solar radiation measuring instrument test. Therefore, a deep research is carried out on solar simulators to test of solar radiation measuring instrument, so that obtain the requirements of performance test of solar radiation measuring instrument. With a combination of the requirements for national regulations of metrological verification and performance test of pyranometer and pyrheliometer, it lays emphasis on the research of design methods for improving radiation uniformity and stability of solar simulators; it also focuses on design methods of multidimensional detection workbench, which achieves different detection of solar radiation. After practical test, solar irradiation is within Φ60mm; irradiation non-uniformity is better than ±0.8%; instability is better than ±0.72%; rotating angle precision is better than 0.09°. Then, solar simulator is used to carry out pyranometer sensitivity test, pyranometer directional response test, pyranometer tilt response test and non-linearity test for radiation instruments. Test results show that the solar simulator meets the testing requirements of solar radiation measuring instruments.     

Development of Solar Spectroradiometer for Meteorological Observation

A new generation of solar spectroradiometerhas been developed by CUST/JRSI to improve solarirradiance observation data underhyperspectral resolution. It is based on the grating spectroradiometer with a back-thinned CCD linear image sensor and is operated in a hermetically sealed enclosure. The solar spectroradiometer is designed to measure the solar spectral irradiance from 300nm to 1100nm wavelength range with the spectral resolution of 2nm (the full width at half maximum). The optical bench is optimized to minimize stray light. The Peltier device is used to stabilize the temperature of CCD sensor to 25℃, while the change of temperature of CCD sensor is controlled to ±1℃ by the dedicated Peltierdriver and control circuit.     

降低模块化多电平换流器子模块电容值的控制方法

模块化多电平换流器(MMC)因必须对子模块电容电压波动范围进行限制,导致所需的子模块电容值较大,带来较大的成本和体积问题。提出了一种降低MMC所需电容容量的运行方式和参数设计方法。所提方法将子模块电容电压直流分量的实际运行值适当降低一定的比例,使电容电压波动的最大允许幅度增大,使选择较小的电容值成为可能。详细分析了所提方法的运行方式。为使所提出的降低电容容量的运行方式能够更好地实现,还提出了一种可以实现交流端口电流、直流端口电流和内部环流解耦控制的桥臂瞬时电流直接控制方法。通过这一方法可以直接控制换流器的内部环流分量,并能够动态调节各桥臂子模块电容电压。通过RT-LAB平台对所提出的运行方式进行了详细的仿真研究,验证了其可行性和有效性。     

Formulation,characterization and clinical evaluation of propranolol hydrochloride gel for transdermal treatment of superficial infantile hemangioma

The objective of the present study is to formulate and characterize propranolol hydrochloride (PPL?·?HCl) gel, and to evaluate the efficacy of this formulation in transdermal treatment for superficial infantile hemangioma (IH). The transdermal PPL?·?HCl gel was prepared by a direct swelling method, which chose hydroxypropyl methylcellulose (HPMC) as the matrix and used terpenes plus alcohols as permeation enhancer. Permeation studies of PPL?·?HCl were carried out with modified Franz diffusion cells through piglet skin. Our results pointed to that among all studied permeation enhancers, farnesol plus isopropanol was the most effective combination (Q_24, 6027.4?±?563.1?μg/cm², ER, 6.8), which was significantly higher than that of control gel (p?相似文献   

基于实验成绩评定分析的实验教学改革探讨

为了进一步提高学院实验教学质量,基于实验教学成绩评定标准,分析学院土力学实验课程教学现状和存在的问题,查找实验教学体系设计缺陷,在以往专业实验基础上增设专业基础实验,修订实验成绩评定方案,探讨实验教学改革及实验管理方式,优化实验教学成绩评定体系。结果表明,基于实验课成绩评定的实验教学改革能较好地改善实验教学效果,进一步完善实验教学方法,切实提高学生的创新和动手能力,培养其独立开展科学研究的能力和素养。