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1.
矩阵乘积的行式,列式   总被引:1,自引:0,他引:1  
给出了m×m矩阵与m×n矩阵的行(列)式的表达式.若A=a11a12…a1ma21a22…a2m……am1am2…ammB=b11b12…b1nb21b22…b2n……bm1bm2…bmn分别是m×m,m×n矩阵,则|A||B|=|AB|+∑i1<i2<…<itj1<j2<…<jt1≤t≤mn-t≥mNBi1i2…itj1j2…jtNAB1…m(-1)st+1jt+1…(-1)snjn其中i1,i2,…,it是1,2,…,m中t个数码;j1,j2,…,jt,jt+1,…,jn是1,2,…,n的一个排列;sr=π(j1,j2,…,jt,jr)(r=1,2,…,n)是排列j1,j2,…,jt,jr的反序数.  相似文献   

2.
研究带有变化时间方向的非线性变型方程。其中λ=0或1,函数W(p);R℃R,当│p│≥N(〉0)时W′(p)≥δ〉0,当│p│〈N时W′(p)可以变号,证明了其第二边值问题当W(p)=(γ1P^2n-γ0)p时广义解的存在唯一性。  相似文献   

3.
对不定方程ax+by=n(a,b包含于N+,n包含于N,(a,b)|n,)得出了其有非负整数解的充要条件;并得到当(a,b)=1时,不能表为形式ax+by(其中x,y包含于N)的自然数的个数为ψ(a,b)/2,在1,2,3,...,ψ(a,b)-2这些自然数中,能表的与不能表的成对出现,呈首尾等距离对应。  相似文献   

4.
证明了满足σ2 ( G)≥n- π( G)的连通图 G,当图 G的阶为n= n1 + n2 + …+ np 且n1,n2,…,np 中奇数个数≥π( G)时,存在阶为n1,n2,…,np 的链划分  相似文献   

5.
讨论了满足σ2(G)≥n-2的连通图的链覆盖问题。证明了当连通图G满足σ2(G)≥n-2时,对任意的奇数k(1≤k≤n-1),存在阶为k和(n-k)的两条覆盖G,特别当图,G的阶数为奇数时存在Hamilton链,并在此条件下得出链覆盖数为π(G)=2时的极限图类。  相似文献   

6.
考虑了拟线性椭圆型方程∫G{vA(x,u,u)+vB(x,u,u)}dx=0,v∈W1p(G)得到了此方程下解的先验估计,推广和改进了已有文献中的某些结果。  相似文献   

7.
讨论了满足σ2(G)≥n-2的连通图的链覆盖问题.证明了当连通图G满足σ2(G)≥n-2时,对任意的奇数k(1≤k≤n-1),存在阶为k和(n-k)的两条链覆盖G,特别当图G的阶数为奇数时存在Hamilton链,并在此条件下得出链覆盖数为π(G)=2时的极限图类.  相似文献   

8.
研究图及其补图的荫度和线荫度间的关系,证明了a(G)+a(G)≤1+{p/2}和a(G)+a(G)≤p-1,改进了以前的结果。  相似文献   

9.
茅旭  王岩 《食品科学》1994,(6):47-50
通过体检筛选出的29名志愿者被随机地分为两组,每天分别补充50g奶油(n=15,第1组)和100g奶油(n=14,第2组)共10天。实验期间共收集三次血,尿样品以分析其Zn,Cu,Mn,Cr的含量。实验结果如下:1.两组的血Cu均明显升高,第2组的血Zn也明显升高,血Mn和Cr均无明显改变。2.两组的尿Zn,Cu,Mn,Cr含量均无明显变化,但24h尿Cu的排泄量确明显减少。3.血Cu与血Zn由明  相似文献   

10.
给出了有限域G上某些方程解组的计数性质,特别给出G上的方程x'y=b在Gn×1中解组的个数:当b≠0时,为q ̄(n-1)(q ̄n-1);当b=0时,为q ̄(n-1)(q ̄n+q-1).其中b∈G,(x,y∈G_(n×1)),G_(n×1),为G上的n×1阶阵,为G中元素的个数。  相似文献   

11.
蛋白质水解度测定方法综述   总被引:27,自引:0,他引:27  
对目前国内外常用的蛋白质水解度测定方法进行了综述,其中pH—state方法是通过滴定水解过程中释放的质子测定DH;OPA、TNBS及国内常用的水合茚三酮和甲醛等测定方法是利用游离氨基的反应测定DH。  相似文献   

12.
研究了聚多元羧酸盐的合成方法及反应机理,将其应用于洗涤剂和PVC制品中分别代替三聚磷酸钠和邻苯二甲酸二丁酯,证明有良好效果。  相似文献   

13.
SUMMARY: A partially purified immunoglobulin G (lgG) solution prepared from the serum of species to be tested was heated to the specifications for sausages. The resulting supernatant fluid was decanted and the precipitate washed with saline and used to immunize rabbits. The supernatant fluid was used to sensitize tanned sheep red blood cells. The immune serum was rendered monospecific by absorptions with heterologous, heated lgG precipitates. A sample of monospecific immune serum was absorbed with a washed homogenate of sausage. Aliquots of the monospecific immune serum, both untreated and sausage absorbed, were tested with cells sensitized with the homologous heated lgG supematant fluid. A significant reduction of titer by sausage absorption indicated that the sausages contained the meat homologous to the immune serum.  相似文献   

14.
Hop oil emulsions prepared from different varieties of hops have been found to exhibit enhanced physical stability on the addition of blends of the emulsifiers Span 20/Tween 80 or Span 60/Tween 60. Examination of the particle size and volume distributions of an emulsion by use of a Coulter Counter was found to be an excellent method of monitoring its stability. An indication as to the relative efficiency of emulsifiers can be obtained from Coulter Counter measurements on hop oil emulsions after storage for 4 days. The use of an ultracentrifuge provies a rapid means of testing emulsion stability and hence the effectiveness of emulsion stabilizers.  相似文献   

15.
SUMMARY— The mechanism and generality of the known stabilization against autoxidation conferred on linoleic acid by certain basic amino acids, such as lysine and arginine, was investigated. Basic amino acids were the only class of compounds found to confer the effect. However, the smallest basic amino acid, 2,3-diaminopropionic acid, was not effective, nor was αβω-diaminc acid, 3,6-diaminohexanoic acid, although a simple isomer of lysine. The stabilization was observed only in the solid phase. Inclusion of sodium chloride in the solid matrix was deleterious to the effect. A large number of physical and chemical observations were made and correlated but it has not been possible to draw detailed conclusions about the mechanism of stabilization, nor can a detailed structure of the stabilized complex be suggested. The cause of the phenomenon appears to be closely associated with the physical arrangement of the ions in the crystal lattice.  相似文献   

16.
百年风尚     
《中国服装(北京)》2013,(19):130-133
一场流光溢彩、赏心悦目的展览,一段百年风尚演进的传奇旅程,一次东西方文化艺术的完美对话。2013年9月13日,“博萃臻艺一中西方珍宝艺术展”在辽宁省博物馆举行了隆重的开幕仪式,法兰西共和国驻华大使白林女士、辽宁省文物局局长丁辉先生、辽宁省博物馆馆长马宝杰先生、卡地亚全球总裁兼首席执行官邓阁仕先生、卡地亚区域行政总裁(北亚洲)陆慧全先生、卡地亚中国区首席执行官陆意斯先生、辽宁省文物店总经理张春鹰先生,以及众多文化界与文博界的贵宾齐聚一堂,共同见证了这场文化艺术盛事。  相似文献   

17.
本文基于点的复合运动理论,用球坐标法推导出点的速度及加速度的计算公式,进一步论证了理论力学中点的速度,加速度公式的正确性。  相似文献   

18.
灵芝不同部位多糖含量测定   总被引:8,自引:0,他引:8  
采用苯酚-硫酸法对灵芝菌盖表皮层、木栓层、菌柄、孢子粉、发酵菌丝体等部位中的灵芝多糖进行了测定,结果发现,灵芝发酵菌丝体中的多糖含量明显高于灵芝的其它部位,其含量顺序分别为:发酵菌丝体〉菌盖表皮层〉孢子粉〉菌柄〉木栓层。  相似文献   

19.
本文论述了过低的棉短绒成熟度会引致粘胶生产过程压榨困难和过滤障碍。描述了在蒸球内设置中通管、来用重蒸轻漂、稳定漂白聚合度、以及漂后的除杂疏解等先进的工艺制造棉浆粕,有助于反应性能的提高,改善粘胶的过滤性能。但打浆时过分切断使纤维长度过短,会影响碱纤维素的压榨。采用干毯抄浆、浆粕存放(一段时间)均有助于浆粕水份均匀性的提高。  相似文献   

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