一类恰含两个圈的本原不可幂定号有向图的广义基

研究了一类恰含两个圈的本原不可幂定号有向图,通过分析图形特点,综合利用SSSD途径对和Frobenius指数的特性推导出这类图的广义基.     

星斗山自然保护区水杉母树的生长状况及保护策略

在湖北西部地区的星斗山国家级自然保护区西片利川市小河境内分布着大面积的水杉原生种群.近期对该原生种群的分布及生存现状进行了调查,针对其生境的恶化及遭受的病害、虫害、煤烟毒害及雷击害等情况,提出了相应的措施和对策.     

体素及其拼合运算的理论探讨

当前,计算机图形显示技术中的重要课题之一是三维几何造型技术的研究,它不仅是构造真三维图形软件的基础,而且也是CAD/CAM技术中的关键技术.作为三维几何造型的基础是体素及其对体素的各种拚合运算.本文以作者在微型机上研制开发的二次曲面体造型系统ASMS和平面多面体造型系统PDLS为实验基础,探讨了三维几何造型技术中体素及其拚合运算的基本理论.从三维形体及其它的正则性到体素及其拚合运算都给出了较为确切的定义,并对由某些定义推出的若干结论进行了详细的证明.在本文的最后给出了根据这些基本理论研制的ASMS系统和PDLS系统运行的部分结果.     

怒江傈傈族妇女宗教信仰中的伦理观念

傈僳族的传统宗教信仰无论是自然崇拜、图腾崇拜或是祖先崇拜,始终与民族文化紧密不可分,与宗教有关的各种礼仪、禁忌,约束、规范着妇女的行为和社会生活.基督教的传人使傈僳族女性的伦理道德观发生了极大变化,伴随着改革发展开放的推进,以及经济社会的发展,傈僳妇女基督教伦理道德观必将对现实的当今社会产生积极的影响作用.     

An Algorithm of Fitting Operation in Solid Moulding System

This paper propose a quick and simple fitting operation which is a efficient algorithm for two primitives with against face or same central line.     

某类本原不可幂定号有向图的第一类广义基

利用有关本原不可幂定号有向图的相关理论方法,对某类含有三个圈的本原不可幂定号有向图进行了研究.根据图形的性质,综合运用SSSD途径对、Frobenius指数和异圈对的相关理论,进而得出这类本原不可幂定号有向图的第一类广义基,即Local基.     

Cerebrospinal fluid from a dog with neurologic collapse

A 3-year-old Staffordshire Terrier was presented to the Texas Veterinary Medical Center with a short progressive history of anorexia, weight loss, and weakness that had progressed to ataxia and collapse with empirical treatment. The dog was tetraparetic and obtunded. Results of a complete neurologic evaluation were consistent with severe, multifocal to diffuse disease involving the forebrain, spinal cord, and brainstem. Cerebrospinal fluid, obtained via cerebellomedullary cisternal puncture, was highly cellular and contained large atypical round cells with small numbers of nondegenerate neutrophils and large mononuclear cells. Rare eosinophils and small lymphocytes were noted. The atypical round cells were approximately 15–25 μm in diameter with a single nucleus set in a small amount of cytoplasm. The nuclei were typically round to slightly ovoid; however, occasional notched, lobulated, and reniform nuclei were observed. These cells were interpreted as malignant lymphocytes. Owing to a grave prognosis, the animal was euthanized and a necropsy was performed. No gross lesions were found in the central nervous system. Multiple sections of cerebellum, medulla, and spinal cord contained a diffuse neoplastic infiltrate that was predominantly meningeal with rare superficial neuropil invasion. The neoplastic cells were arranged in sheets, cords, and rosettes. Immunohistochemical staining for vimentin, pancytokeratin, CD3, CD79a, synaptophysin, S-100, and neuronspecific enolase was negative; glial fibrillary acidic protein (GFAP) staining was equivocal. Based on histologic findings, a diagnosis of medulloblastoma was made. This case documents the rare occurrence of a canine medulloblastoma and illustrates the difficulty in distinguishing between some embryonal brain tumors and lymphoma.     

陆地棉品种与陆地棉族系种质系间生理生化性状的杂种优势

采用ＮＣⅡ遗传交配设计,选用３个陆地棉常规品种和５个陆地棉族系种质系材料杂交,杂种Ｆ１生理生化性状的中亲优势、竞争优势明显存在。过氧化物酶（ＰＯＸ）活性、叶面积、干重及光合速率的优势率较大,特别是植株生长前期优势更大,说明棉花种内杂种在生长前期表现生长和光合作用优势。色素类性状的中亲优势、竞争优势都为负,并且生长前期表现更大的负向优势,因此不能简单地把色素高含量与产量高优势联系起来。生理生化指标不同时期中亲优势分别和皮棉产量中亲优势作通径分析表明,叶面积、干重与酶活性、光合速率这两个多元系统的变异能较好地反映皮棉产量优势的变异。并对生理生化性状相互间关系及与蕾铃脱落、皮棉产量的关系进行了讨论。     

二阶变系数线性微分方程及其衍生方程

目的探究二阶变系数线性微分方程的求解.方法从构造二阶变系数线性微分方程解的形式出发,给出正负各级衍生方程的概念.结果得到二阶线性微分方程衍生方程的存在性,各级衍生方程的递推公式,导出二阶变系数线性微分方程与衍生方程解的关系.结论得到二阶变系数线性微分方程求解方法的重要结论.     

蜂蜜罐头中核桃仁褐变问题初探

通过褐变实验和护色试验表明 ,蜂蜜罐头中核桃仁的褐变是由于蜂蜜与核桃仁中的单宁物质作用的结果 ,属于非酶褐变。去掉核桃仁的皮 ,就可解决核桃仁的褐变问题。