三江平原水利综合规划的重新编制问题

三江平原是我国重要的商品粮基地和粮食战略后备基地。原有规划距今已过30年，远不能适应现代发展要求。结合新的形势，提出了重新编制三江平原综合规划的现实意义、目标设想及主要修编内容。     

LaK747/509璃璃配方的研究

本工作中我们选择了B₂O₃-La₂O₃-Y₂O₂-ZrO₂系统作为玻璃基础组成。最后获得的LaK747/509玻璃组成中,不含有钍的成份。由于该玻璃具有一系列好的性质,如析晶范围窄、析晶速度慢以及粘度大等等,因此可以成功地在12-30L铂埚中进行熔制,并获得了尺寸为φ200×25mm的高质量玻璃。     

巴基斯坦：穆斯林美食大秀场

巴基斯坦的美食充满了穆斯林特色以及南亚的特有香料所带来的奇异口感，蕴涵着阿富汗、土耳其和伊朗的中东风情，杂糅着欧洲、美洲与中国的美食特色，再加上历史上与印度的千丝万缕的联系，又使这里美食风格带着浓郁的印度风味。[编者按]     

川中丘陵区一种新型小流域径流输沙模型的建立与应用

径流输沙模型对定量评价水沙的输出响应具有重要的意义。本研究在已有研究成果的基础上，通过对四川盐亭县林山西沟小流域的径流、泥沙进行现场观测与分析，提出含沙量单位线的定义及其确定方法，建立了适应该小流域的径流输沙模型。并应用实测资料进行比较，表明模型的模拟结果可靠，模拟过程确定性系数达0．8以上，为川中丘陵区小流域径流输沙过程的预测预报提供了一个新方法。     

Tunable circular patch antennas

A method to control the resonant or operating frequencies of circular patch antennas has been investigated experimentally and theoretically. It consists of the placement of passive metallic or tuning posts at approximate locations within the input region of the antenna. Comparison of measured and analytical results seems to establish the validity of a theoretical model proposed to determine the input performance of such circular patch antennas.     

Model concrete beam-column joints subjected to cyclic loading at two rates

Small-scale models of reinforced concrete beam-column joint were subjected to large cyclic displacements at two rates: 2.5×10⁻³ and 1.0 Hz. To assess damage, free-vibration tests were conducted. The reliability of the modelling techniques was established by comparison of the results for the slower rate with those obtained from the full-scale tests on prototype. The higher rate of loading caused a greater damage than that at the lower rate. This was evidenced by the measurements of the energy absorbed in the hysteresis loops, equivalent damping, and the stiffness and damping obtained from the free-vibration test. The relatively greater extent of damage appears to result from the different bond behaviour at different rates of loading.     

钛铁矿流态化氧化机理研究

对低品位钛铁矿进行预氧化、预还原等预处理后可满足硫酸法生产钛白粉工艺所需高品位钛铁矿的要求。本试验采用流态化预氧化方法处理风化程度低、含硫较高的钛铁矿。结果表明 :流态化氧化可大幅度地降低钛铁矿中硫含量 ;钛铁矿流态化氧化的适宜温度为 :80 0～ 90 0℃ ,且在此温度范围内 ,随温度的升高 ,钛铁矿的氧化速度增加 ,在 90 0℃时 ,5 0min钛铁矿基本能完成氧化     

再谈过度包装

过度包装作为一种虚假的、不合理的包装在当下仍有市场。按市场的规律去追溯,其原因在于生产者、设计者、消费者、决策者4个方面。文章从生产者的失信行为、设计者的伦理道德、消费者的虚荣心理、决策者的法规建制方面进行了阐述,指出通过社会各界的合力,结合国外的成例,中国的包装业将会进入合理、适度包装的良性循环发展阶段。     

Low temperature and strain rate dependence of fracture stress and fracture toughness on thin Fe40Ni40B20 amorphous ribbon

The fracture stress and the critical stress intensity factor of the Fe₄₀Ni₄₀B₂₀ amorphous metallic ribbons 20 μm thick were measured in the temperature range 4.2–300 K and at deformation rates from 3.3×10⁻⁶ to 1.25×10⁻³ m⁻¹ with the aim to obtain more information on the condition for the onset and development of the inhomogeneous plastic deformation and fracture.     

掺Yb相移光纤光栅形成过程的分析

研究了用二次曝光法制作掺Yb相移光纤光栅的实验过程 ,并对相移光纤光栅制作过程中出现次峰的情况进行了理论分析。合理地解释了该现象