论文部分内容阅读
城市大跨、浅埋地下洞室控制爆破技术
【出 处】
：
石家庄铁道大学学报（自然科学版）
【发表日期】
：
2000年Z1期
其他文献
以玉米芯提取液为还原剂,在PVP保护下制备了钯纳米催化剂(Pd NPs)。通过正交实验,筛选了氯钯酸钠、提取液和PVP用量以及还原温度等制备条件对PdNPs催化Suzuki偶联反应的影响,
Capability of TMPA products to simulate streamflow in upper Yellow and Yangtze River basins on Tibet
Due to the high elevation, complex terrain, severe weather, and inaccessibility, direct meteorological observations do not exist over large portions of the Tibe
腹腔镜与传统的开腹手术相比，具有手术创伤小，切口疤痕小，出血少，患者痛苦轻，恢复快等优点。近年来，正在被越来越多的医生和患者所接受。腹腔镜在妇科领域中将被广泛地使用和普及。
以聚己二酸新戊二醇酯二醇(PNA)和聚氧化丙烯醚二醇(PPG)为混合软段、异佛尔酮二异氰酸酯(IPDI)、甲苯二异氰酸酯(TDI)、异佛尔酮二胺(IPDA)、相对分子质量调节剂-二正丁胺为
Climate change trend and its effects on reference evapotranspiration at Linhe Station, Hetao Irrigat
Linhe National Meteorological Station, a representative weather station in the Hetao Irrigation District of China, was selected as the research site for the pre
In this study, the performance of the extended shallow water model(ESWM) in evaluation of the flow regime of turbidity currents entering the Dez Reservoir was i
分析了LDPE产品18D和mLLDPE产品1018CA的基础性能,用18D共混改性1018CA,研究共混物的流变性能和吹膜性能。结果表明:在茂金属线型低密度聚乙烯中添加一定量的LDPE可使其熔体