Fan Ky截口定理的进一步推广

ＦａｎＫｙ在文献［１］中证明了在变分不等式理论研究中具有重要作用的截口定理，本文进一步研究了这一定理，所得结论是文献［１—３］中相应定理的推广。     

一类周期性抛物型方程的边界元分析

得到了周期性热传导扫物型方程的边界积分方程和变分方程,给这似解误差估计,文中的结果消除了边界元计算中边界积分方程的区域积分项。     

一类退化抛物型方程广义解的局部有界性

在很一般的结构条件下证明了一类退化抛物型方程广义解的局部有界性。     

一类Kirchhoff方程最小能量变号解的存在性

研究一类Kirchhoff方程最小能量变号解的存在性,其中非线性项满足指数增长.首先用Brouwer不动点定理证明M是非空的,其次寻找能量泛函在M中的极小值点,最后应用形变引理证明极小值点就是方程的最小能量变号解.方程中由于非局部项的出现导致通常的变分方法不再适用,因此将方程对应的能量泛函限制在M上,最终得到了方程变号解的存在性结果.     

一类交叉耦合抛物型方程组解的渐近性态

研究了一类交叉耦合抛物型方程组解的整体存在及爆破问题.首先构造方程组的上、下解,再利用比较定理,得到由幂函数和对数函数完全耦合的退化抛物型方程组解的整体存在及解在有限时刻爆破的充分条件.     

一类拟线性抛物型方程广义解的整体有界性

得到了如下拟线性抛物型方程的广义解的整体有界性，并在一些特殊条件下给出了解的最大模的先验估计。     

一类非线性抛物型方程组解的整体存在及爆破

研究了一类带有非线性边界条件的非线性抛物型方程组解的整体存在及解在有限时刻爆破问题.通过构造方程组的上、下解,得到了解整体存在的一个充分条件及解在有限时刻爆破的一个充分条件.     

回归估计量均方误差的近似值及其估计量的偏差

对回归估计,有下列结果     

仿射非线性系统状态方程的任意阶近似级数解

对于仿射非线性系统状态方程,对其右端进行Taylor展开,使之成为状态变量的无穷级数形式。利用微分方程理论,求得该方程的级数形式的任意阶近似解析解。     

关于积分第二中值定理“中间点”的渐近性

研究了积分第二中值定理“中间点”的渐近性，并把所得结果应用于近似求积。     

等速输送运动纱线横向振动分析的近似解法

讨论在非齐次边界条件下由端点运动激励的纱线强迫振动问题．根据生产实际中导纱器作等速横向运动的情况，应用伽辽金方法给出稳态响应的近似解，同时与运用傅立叶级数展开所得到的稳态响应的精确解通过计算与实验进行分析与比较．     

会场家具环形排布的若干问题及解决方案

交流与沟通是工作和学习的重要途径之一,因而大型会议、演讲的报告厅以及教室等会场空间就成为了大型企业、事业单位以及学校必备的交流场所。会场家具作为这个空间内的重要组成部分之一,它与空间相辅相成,合理科学的布置、排布会场家具对会场空间气氛营造的重要性显而易见。环形排布是会场家具常见的布置方式,而这种排布方式相较直线型排布情况更加复杂,需要注意的问题也更多。结合实际总结归纳这些问题以及常用的解决方案,并提出一些可以尝试的新的解决方案,以供参考。     

间接估计酒精发酵过程参数的研究

本文初步探讨了用呼吸商(RQ)和耗氧速率(OUR)来间接估计耗糖速率(GUR)、菌体得率系数(Yx/s)和酒精得率系数(Yp/s)。在此基础上,根据酵母生长动力学,通过对限制性基质物料衡算,得出了用糖流加速率来估计菌体出生长速率的数学模型。     

Estimation of genetic parameters for measures of calf survival in a population of Holstein heifer calves from a heifer-raising facility in New York State

The objectives of this study were to estimate the genetic parameters of survival to weaning and survival to exit for a population of Holstein calves from New York State, as well as to associate the estimated breeding values determined in the current study with traits from ongoing genetic evaluations used in Canada and the United States. Data were recorded for 7,372 heifer calves at a commercial rearing facility in New York State from arrival at 1 to 7 d of age for the duration of stay at the facility (on average, heifers departed the facility 1 mo before calving). Performance and disease up to weaning and mortality before and after weaning were recorded. Analyzed data were limited to daughters of sires with at least 10 calves originating from farms that had sent a minimum of 5 calves to be raised at the facility. As such, calves from 264 sires and 36 herds were studied using 2 statistical methods. The first method, calf survival, used a Weibull proportional hazards model, with survival defined as age at culling, death, or censoring. The second method, a 2-trait sire model, included survival from arrival to weaning (SUV1) and survival from weaning to exit (SUV2). Both models included fixed effects of arrival weight, serum total protein, weaning weight, season and year of birth, and calving ease score. Herd and sire were included as random effects. Significant associations among all fixed effects and calf survival were observed. In general, very light or heavy weight at arrival, low total protein, low weaning weight, and difficult birth increased risk of mortality for calves. The heritability of survival from the first method was 0.063. The heritabilities from the linear model were 0.001 for SUV1 and 0.036 for SUV2. The genetic correlation between SUV1 and SUV2 was 0.58. Genetic variance was close to zero for survival of calves to weaning, but was greater for survival after weaning through the growing period. Breeding values were estimated for SUV1 and SUV2 and correlated with routinely evaluated traits from Canadian and US genetic evaluations. Significant associations between genetic evaluations for survival traits and routinely evaluated traits in Canada and the United States were found, in particular with conformation body traits, somatic cell score, fertility, and longevity.     

老年人生活空间人性化设计探究——以日本老年人生活空间设计为例

随着社会的发展,老龄人口比例的增加,对建筑以及生活空间设计提出了更高的要求。本文从老年人人性关怀角度出发,概述了根据老年人身体状况的变化,针对性的对生活空间环境、色彩环境、照明环境要素进行设计。     

有限封闭弱渗透含水层系渗流问题解的渐近式

对有限封闭具弱渗管层的含水层系渗流问题，在普遍情形下求得了解的渐近式，其结果可用于地下水资源的评价与利用及多油层油田的开发等问题。