无机添加剂的浓度及pH值对纺锤形α－Fe_2O_3晶貌的影响

本文以高浓度Ｆｅ３＋盐溶液为原料，采用沸腾回流的强迫水解法研究了无机添加剂浓度及反应液初始ｐＨ值对产物纺锤形α－Ｆｅ２Ｏ３晶貌的影响。结果表明，添加剂浓度和反应液初始ｐＨ值对纺锤形α－Ｆｅ２Ｏ３的轴比具有明显的影响，并且当添加剂浓度增加到一定值时，纺锤形α－Ｆｅ２Ｏ３出现解体。     

In－BiCaVIG的晶体生长与性能

本文报导了用助熔剂法成功地生长大尺寸掺铟ＢｉＣａＶＩＧ晶体的方法以及实验结果，介绍了该单晶在近红外区的磁光器件中的重要应用。     

Exact controllability for semilinear parabolic equations with Neumann boundary conditions

This paper studies the problem of exact boundary controllability of second-order semilinear parabolic equations when the control is under Neumann's boundary conditions. For a nonlinear term with a sublinear growth we prove the global null-controllability and for the superlinear growth case we prove the local exact controllability of the equations.     

新型线圈式磁弹性扭矩传感器

阐述了新型线圈式磁弹性扭矩传感器的原理,推导出其输出表达式,进而说明了线圈式磁弹性扭矩传感器具有输出平稳、响应快的特点。     

钠化焙烧钒渣时氯化挥发镓的热力学分析

本文讨论了６００～１２００Ｋ范围内使用ＮａＣｌ作为添加剂焙烧钒渣时氯化发镓的热力可靠性。结论是：氯氧比的大小与溶性钒酸钠生成有直接联系，ＮａＣｌ和Ｎａ２Ｏ。Ｖ２Ｏ５平衡时的氯氧比最大；在氯化钠作用下，镓主要生成ＧａＣｌ３挥发，计算得到的ＧａＣｌ３的生成压相当大。     

Time-varying adaptive filters for evoked potential estimation

Adaptive implementation of an optimal time-varying filter (TVF) for evoked potential (EP) estimation is addressed here. A data-adaptive scheme is used, which converges asymptotically to the optimal TVF solution. Two basic adaptive TVF's (ATVF's) are first introduced, namely least mean square (LMS) ATVF and recursive least-squares (RLS) ATVF. The latter converges much faster than the former. Since the basic ATVF's usually require a relatively large set of response trials to get a meaningful solution, a reduced-order ATVF is further presented and the corresponding LMS and RLS (including a fast RLS) adaptive algorithms are developed. To save memory, a truncated Fourier expansion is suggested to express approximately the time-sequenced weight-vectors of the ATVF's, resulting in a simplified reduced-order ATVF. Finally, extensive simulations are provided to confirm the superior performance of the ATVF's. The present ATVF's can be used as prefilters for latency-corrected average (LCA) processing to obtain more informative estimates of EP signals     

WTG420铁路罐车用钢的组织结构和力学性能分析

分析了ＷＴＧ４２０铁路罐车用钢的组织结构和力学性能。提出了冶炼与轧制的技术关键，其一，添加稀土元素改善钢中夹杂物；其二，采用控轧控冷使铁素体晶粒细化。     

利用氧化铁皮烧结矿做炼钢氧化剂的探讨

用氧化铁皮研制烧结放代替铁矿石做炼钢氧化剂经试验表明，其理化性能均优于铁矿石，可替代铁矿石作为炼钢的氧化剂。氧化铁皮的开发利用，综合效益显著。     

Averaged heat transfer during periodic fluctuations of the heat transfer intensity of the surface of a plate,a cylinder,or a sphere

Processes of heat transfer with periodically varying intensity on the surface of heated bodies of three typical geometries (plate, cylinder, sphere) are considered. The true heat transfer coefficient, which varies in time by the law of a periodic step function having two free parameters — amplitude and asymmetry, is specified on the heat transfer surface. Resultant relations are obtained for calculating the experimental heat transfer coefficient, which is the quantity measured in a traditional heat transfer experiment and used in applied calculations.Moscow Power Engineering Institute. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 68, No. 2, pp. 225–228, March–April, 1995.     

复合棒弯曲振动的矩阵解法

按组成材料和横截面大小的不同，把复合棒分成若干单元，每单元两端的位移，截面转角，弯矩以及剪力间的关系用矩阵表示，各单元矩阵相乘即复到复合棒总的矩阵，最后由此求解复合棒的共振条件，以及两端振速比，还给出了应用例。