特定最大功率传输问题探讨

本文通过理论计算给出几种特定情况下的功率传输问题。     

碳酸钕对AZ91合金组织的细化和腐蚀性能的影响

通过介绍实验条件实验方法及结果,并对其进行讨论,研究碳酸钕对A291合金组织的细化和腐蚀性能的影响。     

Intramammary expression and therapeutic effect of a human lysozyme-expressing vector for treating bovine mastitis

To develop a gene therapy strategy for treating bovine mastitis, a new mammary-specific vector containing human lysozyme (hLYZ) cDNA and kanamycin resistance gene was constructed for intramammary expression and clinical studies. After one time acupuncture or intracisternal infusion of healthy cows with 400 μg of the p215C3LYZ vector, over 2.0 μg/ml of rhLYZ could be detected by enzymatic assay for about 3 weeks in the milk samples. Western blotting showed that rhLYZ secreted into milk samples from the vector-injected cows had molecular weight similar to that of the natural hLYZ in human colostrums. Twenty days after the primary injection, the quarters were re-injected with the same vector by quarter acupuncture and even higher concentrations of rhLYZ could be detected. Indirect competitive ELISA of milk samples showed that the vector injection did not induce detectable humoral immune response against hLYZ. Clinical studies showed that twice acupuncture of quarters with the p215C3LYZ vector had overt therapeutic effect on clinical and subclinical mastitis previously treated with antibiotics, including disappearance of clinical symptoms and relatively high microbiological cure rates. These data provide a solid rationale for using the vector to develop gene therapy for treating bovine mastitis.     

轧制法生产高复基比不锈复合钢板和钢带的开发应用

不锈钢复合板既具有不锈钢的耐腐蚀性、耐磨性、抗磁性、豪华性和装饰性;又具碳钢良好的可焊性、成型性、拉延性和导热性,还可节约镍铬合金、降低成本,因而具有广阔的发展前景,值得大力推广应用.     

FBE复合覆盖层天然气管道外防腐施工实践

简述了天然气集输设施腐蚀的危害。结合工程实践。介绍了FBE复合覆盖层天然气管道外防腐施工方法及施工工艺，从防腐材料的选择、施工环境温度的控制、涂料的配制等方面对施工技术措施及质量控制要点进行了重点阐述。     

学习毛泽东的思想政治工作艺术

毛泽东的思想政治工作艺术其本质是对思想政治工作的一种艺术掌握方式,是目的性和工具性的统一。毛泽东丰富多彩的思想政治工作艺术在当今时代仍然具有生命力,它是新形势下思想政治工作改进和创新的重要方法借鉴。     

A High Speed Detection Scheme for Point Targets in a Multitarget Environment

The purpose of this paper is to develop a high speed detection scheme for moving and / or stationary point targets in a multitarget environment as registered in an IR image sequence. An iterative approximate 3-D line searching algorithm based upon the geometric representation of lines (for non-maneuvering targets in space) in a 3-D space is derived. The convergency of the algorithm is proved. An analysis is performed of the theoretical detection performance of the algorithm. The statistical experiment results show high effectiveness and computational efficiency of the algorithm in the case of low SNR. The idea may be employed to satisfy the real-time processing requirement of an IR system.     

心理治疗还是药物治疗

心理治疗与药物治疗是精神病领域的两种治疗模式。心理治疗模式认为，个体精神状况正常与否主要受情绪、人格等心理因素影响，精神疾病由后天环境和生活经历所致；药物治疗模式则认为，精神病及各类神经症都有其生理基础，大脑机能的缺陷是导致精神疾病的主要原因，因此主张用药物进行治疗。尽管两者在精神病治疗中都有自己的优势与不足，但是在科学一统天下的今天，生物学模式似乎成了治疗的主流。要想最终解决心理治疗与药物治疗之争，科学预测精神病治疗的未来及新世纪心理治疗的命运，必须首先解决：（1）心理学的学科体系问题；（2）精神疾病的界定问题以及（3）心身关系问题。     

基于弯曲路径的复杂温度场重建算法仿真研究

以最小二乘法温度场图像重建算法为基础以费尔马定理为依据，对声学法工业炉温度场检测中由于声波传播路径弯曲对温度场重建所产生的影响进行了研究，给出一种实现声波路径弯曲补偿的复杂温度场重建算法，通过仿真，考察了该算法对不同温度场分布函数的重建效果，结果表明：该算法不但可实现声波路径弯曲的补偿，而且可同时进行温度场的重建，具有较高的重建精度。     

反应条件及添加惰性物质对三聚甲醛合成反应的影响

研究了三聚甲醛合成过程进料浓度、催化剂用量等对副产物（特别是甲酸）生成行为的影响。结果表明，该体系副产物的生成强烈地依赖于反应时间和催化剂硫酸的用量，而与原料浓度的波动无关。在反应－精馏过程的反应器中添加惰性高沸有机物，可有效地缩短反应物的停留时间，提高三聚甲酸的选择性，大大降低快速反应－精馏过程对反应器的设计要求。