MFRG-DPIR FOR THE DISORDERED TRANSVERSE ISING MODEL

A new approximate scheme which is combined by the mean-field renormalization group theory (MFRG) with the discretized path-integral renormalization (DPIR) is employed in the study of the disordered tranverse Ising model (TIM). The critical properties of random-bonds Ising systems on a d-dimensional lattice are calculated with this new approximate scheme.     

粉粒状物料透气性系数的测定

对经过分级的六种均齐粉粒状物料进行透气性系数测定。结果表明:球形小米颗粒((?)_p=1.70mm),透气性系数K=1.191×10~(-9)m~2,在整个固定床范围内都符合达西定律;石灰石粉((?)_P=0.900mm),K=5.831×10~(-10)m~2。文中还讨论了达西定律的适用依据和透气性系数的影响因素。     

单片机控制的可变正(余)弦函数发生器

介绍一种用单片机控制的结构简单、成本低的正(余)弦函数发生器,论述了其基本原理,给出了硬件框图和软件框图,可用于计算机控制的调速系统中。     

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.     

岩爆的力学模型及物理数值模拟述评

结合现有的岩爆研究情况，对岩爆发生机制的力学模型以及在室内实验和数值模拟方面所做的工作进行总结，介绍可资岩爆借鉴的研究领域，提出岩爆的研究方向。     

中国入世对政府的影响及政府应对问题

中国成功入世后，各行各业和各市场主体都面临新的机遇和挑战，以及自我适应和应对的问题。相对而言，政府受到的影响是首要的、最为全面而深远的，政府率先入世既十分必要又相当紧迫。政府要实现真正意义上的入世，关键是要转变公务员队伍观念，提高公务员队伍的整体综合素质，转变政府职能，转变行政方式，实现依法行政。     

不对称D—A反应区域选择性及其理论解析

本文以教学研究为基础,系统研究不对称D—A反应区域选译性规律,并运用前线分子轨道理论,采用图解量子化学方法予以理论解析。     

硅、铋离子鉴定方法的探讨

本文对现用叙材中硅、铋离子的鉴定方法进行了改进,改进后的鉴定方法既简单快速,又灵敏可靠.     

整机老炼条件的优化设计

本文通过工程实例，阐述如何利用现有信息来设计产品的老炼条件，以使它在保证产品达到规定可靠性的前提下尽量节省成本