金属矿山深热矿井空气温度的灰色预测

金属矿山深热矿井气温的预测计算是一个难题，本文探讨了应用灰色系统预测理论来解决这一难题的新途径，并通过实例验证了该方法的可行性和有效性。     

半导体激光器到单模光纤耦合技术的现状及发展趋势

简要阐述了半导体激光器到单模光纤的耦合损耗来源，详细介绍和分析了耦合技术的发展和现状，并探讨了耦合技术的发展趋势。     

声表面波脉冲编码调制振荡器

论述了一种直接式声表面波脉冲编码调制振荡器的工作原理及设计方法。实际制作了工作频率为３９４ＭＨｚ、调制频偏大于２００ｋＨｚ、调制信号码速率大于４００ｋｂｉｔ／ｓ、输出功率大于５０ｍＷ、温度稳定性优于±５０×１０－６（－２０°Ｃ～＋６０°Ｃ）的性能优良的声表面波脉冲编码调制振荡器     

人工神经网络A／D变换器

本文对［５］的４位人工神经网络Ａ／Ｄ变换器进行了研究．指出按其方法推广实现多位Ａ／Ｄ时存在突触电阻大小以至无法实现且抗干扰能力也不好的问题并给出了解决办法．同时对如何改善神经元转移特性的硬限幅曲线作了简单讨论．     

离子交换法合成三氨基胍叠氮酸盐

三氨基胍叠氮酸（ＴＡＺ）分子中的含氮量高达８５．７％，燃烧分解时不仅－Ｎ３可释放３６７ｋＪ／ｍｏｌ的键能，而且放出大量的氮气，是一个提高比冲，降低燃烧温度的理想的推进剂两组分之一。     

关于真值维护系统TMS的研究

本文系统地论述了几类典型的ＴＭＳ系统，对它们进行分析和比较，量后简要地叙述近年来在该领域中的一些重要研究动向。     

THE APPLICATION OF COKELET''''S WAVE THEORY IN THE CALCULATION OF WAVE-CURRENT FIELD

By using Cokelet's wave theory,the limiting wave height and the relative waveangular frequency in wave-current field were calculated in this paper.It is indicated by numeri-cal calculation that if the water depth is not too small,the result given by authors'calculationare very close to the results of limiting wave height by Dalrymple(1975)and to the data of rel-ative wave angular frequency by linear wave theory;but if water depth is rather small,thereare some discrepancy,     

ZT3钛合金标准物质均匀性的检验

本文采用方差分析法和平均值一致性检验法来检验钛合金标准物质的均匀性,通过铝和硅两个元素的计算,证明该标准物质均匀度良好,数理统计在分析化学中逐步在应用,这将为今后标准物质的研制开辟新的途径。     

提高海水温度对锌合金和铝合金牺牲阳极电化学性能的影响

研究了提高海水温度对锌合金和铝合金牺牲阳极电化学性能的影响。结果表明，锌合金和铝合金牺牲阳级的电化学性能都随着海水温度的提高而变劣；凡是发生晶间腐蚀的合金，其晶间腐蚀程度都随着海水温度的提高而加剧。低含铝量的锌－铝－镉合金阳极在７０℃海水介质中，工作电位仍负于－１．０１０Ｖ，电流效率＞８０％，阳极工作表面溶解均匀，且不产生晶间腐蚀。     

Dynamic Reservation Multiple Access (DRMA): A new multiple access scheme for Personal Communication System (PCS)

To improve the spectrum efficiency of integrated voice and data services in Personal Communication System (PCS), several reservation-type multiple access schemes, such as Packet Reservation Multiple Access (PRMA), Dynamic Time Division Multiple Access (D-TDMA), Resource Auction Multiple Access (RAMA), etc., have been proposed. PRMA uses the data packet itself to make a channel reservation, and is inefficient in that each unsuccessful reservation wastes one slot. However, it does not have a fixed reservation overhead and offers shorter access delay. On the other hand, fixed reservation overhead is unavoidable in both RAMA and D-TDMA. Compared to D-TDMA and PRMA, RAMA is superior in the sense that its slot assignment is independent of the traffic load. But its implementation is difficult. With these observations, a new reservation protocol, called Dynamic Reservation Multiple Access (DRMA), is proposed in this paper. With this new protocol, the success probability of channel access is greatly improved at the expense of slightly increased system complexity. It solves the problem of inefficiency in PRMA, but without introducing the fixed reservation overhead as in D-TDMA and RAMA. In addition, it is more suited to the dynamic behavior of the integrated traffic because there is no fixed boundary between voice and data slots (which is mandatory in D-TDMA and RAMA). Our numerical results indicate that its performance is superior to the existing reservation protocols, especially in the integrated traffic scenario. Moreover, the soft capacity feature is exhibited when the traffic load increases.