13.5～14.7 MeV中子引起钯 同位素反应截面的测量

用活化法,在E     

Evaluation of the Photo-Protection of Eye-Patch Protectors Used in Phototherapy

An evaluation method for the practical photo-protection of eye-patch protectors (EPs) used in phototherapy for neonatal jaundice is developed.The protecting condition of neonatal eyes using EPs under typical phototherapy light is simulated.The simulation system consists of a neonatal head manikin,an International Light ILT 900 wideband rapid portable spectroradiometer,a standard Air Shields Isolette incubator,and a Medela fluorescent phototherapy unit.The results show that the practical protection of neonatal eyes,provided by EPs which are affected by the material characteristic,shape design,and wearing condition,is comprehensively illustrated using the indices of illuminance (Ev in lux unit) and the spectral irradiance (E in μW/(cm2·nm) unit).     

地下工程中的氡异常及其治理对策

采用热释光（ＴＬ）累积α环境氡监测器先后两批在Ｎ市有代表性的地下人防工程布点２个～４个月，测量室内氡浓度，其结果与瞬时测氡仪的测量结果进行比较，找出氡异常区域．结合地质资料，分析地下工程中氡污染与地球动力学的关系，说明地下工程中的氡异常主要不是来自建材，也不是来自于地基底层地质构造中的岩石放射性含量，而是来自地下新构造断裂带．还探讨了成因机制，提出了综合的治理对策：即大区域的环境评价，了解环境氡的总体危害，划出潜在氡的高本底区域；小区域的氡污染的治理，圈定潜在氡危害地段，避开隐伏的或揭露的新构造断裂带，规划出“安全岛”地带．还对２００Ｂｑ．ｍ－３～６００Ｂｑ．ｍ－３的已建房屋提出了一系列的具体治理措施和补救方法     

K2CO3 catalysis on the reactivity of top charged coke and stamp charged coke

The catalysis of K₂CO₃ on the reactivity of top charged coke and stamp charged coke from Pansteel in China was studied. The coke reaction index of the stamp charged coke was 1%–2% higher than that of the top charged coke. Under the catalysis of K₂CO₃, the coke reaction index of both cokes approximately increased by 4%, 6%, 10% and 6% at 900, 1000, 1100 and 1200°C, respectively. The reactivity of the K-enriched stamp charged coke was 1%–2% higher than that of the K-enriched top charged coke below 1100°C. However, only negligible differences were found in the temperature zone between 1100 and 1200°C. Scanning electron microscopy images illustrated that pores in the top charged coke were smaller and equally distributed, while relatively more big pores exist non-homogenously in stamp charged coke. Due to the different processes in production, the stamp charged coke was more porous and most of the pores tended to be applanate. Cracks were observed in the microstructure of the stamp charged coke during the carbon solution reaction, implying the inferior quality of the stamp charged coke to the top charged coke at high temperature. Diffusion of K during the carbon solution reaction was studied by the energy dispersive spectrometry. It is found that K gradually spreads into the center of lumpy coke with the rising of temperature and is equally distributed on the edges of pores at 1200°C. Besides, oxidation reactions of functional groups become faster with the catalysis of K.content     

形式背景上的分辨关系

研究了形式背景上的强不可分辨关系,弱不可分辨关系、ξ-不相容等概念,讨论了它们的一些性质,论证了ξ-不相容与G偏序集的关系.     

A three-dimensional diffusion equation of suspended sediment by waves and currents

Based on the law of mass conservation, a general three-dimensional diffusion equation of suspended sediment due to waves and currents, adaptable to estuarial and coastal areas, is derived by decomposing the instantaneous velocities and concentrations into three-different-time-scale components respectively. A three-dimensional suspended sediment diffusion equation adaptable to actual calculations is available as the result of the parameterizations of turbulent diffusion term and wave diffusion term. Different from the former diffusion equations, the influence of waves and currents on suspended sediment diffusion can be simultaneously reflected in the newly derived equation.     

癌基因密码子间的距离和Y-内积表示及其应用

为了深入研究正常基因变为癌基因时,氨基酸亲疏水性的变化趋势,在已经建立的代数结构的基础上给出了全新的距离及Y-内积的定义,通过计算得出GF(7)上36个本原多项式及其根,并得出了对应的生物意义的表示,利用所建立的理论数学模型分析了在胃癌,食道癌,肺癌以及B细胞淋巴癌中的p53错义突变过程中氨基酸亲疏水性的变化.结果表明...     

喷射混凝土在桥梁维修加固工程中的应用

笔者主要阐述了锚喷混凝土在桥梁维修加固工程中的应用,并从喷射混凝土设计、喷射混凝土施工两方面分析了喷射混凝土施工工艺的经济性及实用性.     

α-天冬氨酰二肽酶基因工程菌的固定化及其应用

报道 α天冬氨酰二肽酶基因工程菌的固定化及其细胞性质， 并用于 Ａｓｐａｒｔａｍ ｅ的合成．     

各向异性随机表面参量的光散射测量

用原子力显微镜对粗糙硅表面进行了形貌测量,发现其高度分布的各向异性,根据光场分布特点,结合晶片样品表面的散射方位曲线,在入射角是75°的情况下,沿着散射方位曲线测量了样品表面的光散射轮廓,引入自仿射分形随机表面模型,利用傅立叶变换法对光的散射轮廓进行定量分析,成功提取了随机表面参量,并与在原子力显微镜下测量样品表面高度分布经计算所得的数据相比较,验证所得参量的正确性.