高水头船闸输水廊道反弧门水弹性振动试验研究

本文简要介绍水弹性振动模型试验的相似准则，用近似满足水弹性相似准则的有机玻璃模型对－高水头船闸反弧形阀门进行流激振动试验研究．试验表明阀门的振动是随机振动，不仅有质量振动而且有结构振动，有若干阶模态被激发参与振动。在开门和关门过程中，阀门面板脉动压力和阀门振动是不大的，与葛洲坝船闸类似阀门间歇开启的振动水平相当。由于常压模型不能正确模拟空化现象，对于廊道内可能产生的空泡溃灭所引起的阀门振动尚需通过减压模型进行研究。     

超辐射发光二极管的结构特性及其应用

近几年来,由于超辐射发光二极管在光纤陀螺和光时域反射仪等方面的重要应用,已引起了人们的极大关注,许多国家都在竞相研制和开发.本文综述了目前超辐射发光二极管的主要结构和特性及其应用前景.     

山西塔儿山地区金成矿的构造控制因素

本文通过分析晋南塔儿山地区的构造特征，探讨了该区金成矿作用的构造控制因素。     

桐油改性酚醛树脂的结构及固化过程的研究

通过桐油与苯酚在酸性催化剂存在下反应，然后再在碱性催化剂存在与甲醛反应制得了一种热固性桐油改性酚醛树脂。利用红外光谱，差示扫描量热法分析技术对改性树脂的结构及固化反应过程进行了研究。     

实证分析:上市公司资本结构的影响因素

在国内外相关研究的基础上，利用我国资本市场的公开数据，对上市公司资本结构的影响因素进行实证研究，得出了若干重要结论。     

Effect of Forming Pressure on the Internal Structure of Alumina Green Bodies Examined with Immersion Liquid Technique

Green bodies prepared by compaction of alumina granules were made transparent by an immersion liquid technique, and the internal structure was characterized with an optical microscope to study the effect of forming pressure on the internal structure. Clear images obtained by the technique provide more detailed information than other existing methods for structures ranging from one to tens of micrometers. Intergranular pores were present between unfractured granules. Their sizes and concentration tended to decrease with increasing forming pressure. However, pores were clearly present even in the green body prepared at 600 MPa. A rod- and needlelike feature was also found and was concluded to correspond to a high-density region. The significance of large pores and high-density regions on processing as well as the details of the technique is discussed.     

含能材料分子结构与感度的相关性

综述了国外近年来含能材料分子结构参数与感度相关关系的最新研究成果。研究表明：某些芳香族硝基化合物的撞击感度与Ｃ－ＮＯ２键强度有关；硝胺及脂肪族硝基化合物的冲击波感度与分子中Ｎ－ＮＯ２键的数目，长度和分子量相关。     

Optoelectronics in satellite designs

Design of artificial satellites for communication, remote sensing and scientific investigations follows, at present, a fixed pattern based on existing and proven technologies and the requirements of payload or experiment within the constraints of weight, volume and power available. The advances in optoelectronic components and systems have opened up a new dimension in designing satellites of the future, incorporating new technologies. This paper deals with general satellite design concepts based on optoelectronic systems wherever applicable.     

Symmetric Structures of Ultrahard Materials

Diamond and BN have common relatively soft precursor structures that are hexagonal. Electronic structure calculations have now revealed subtle energy differences between the two materials. Another hard material, stishovite, also has a relatively soft precursor phase, quartz, and here again electronic structure calculations have given insight into the nature of the phase transformation. On the other hand, with boron-related materials, the main focus is to connect basic icosahedra structures to produce a hard material. The structural aspects of these materials are examined and possible consequences for low- and high-coordination ultrahard nitrides considered.     

CaF_2-CaO-MgO-Al_2O_3-SiO_2电渣渣系高温力学性能的研究

本文针对结晶器与铸锭作相对移动的电渣重熔过程中对渣系的高温强度及塑性的要求,对10种CaF_2-CaO-MgO-Al_2O_3-SiO_2渣组成进行了渣的高温强度及塑性的测定,建立了渣组成—渣的岩相结构—渣高温强度及塑性间的对应关系,并选择出较合适的成分范围为CaF_2 35～60％,CaO 10～25％,Al_2O_3 10～20％,SiO_25～15％,MgO≈5％。对其中一个成分的渣进行了电渣热穿孔熔铸中空锭生产实验,并取得了良好的表面质量。