模糊聚类在松属种间生理差异中的应用

对松属８个树种的净光合速度,蒸腾速率,气孔阻力和叶温等生理指标进行了测定。结果表明,某些树种存在相似的生理特性;具有相似生理特性的树种对环境有相同的生理需求。采用模糊聚类分析对参试树种按生理特性分成三类;第一类,Ｐｎ和Ｒｓ较大,Ｅ较小,宜生长于光照强,二氧化碳浓度高,水分要求不高的立地;第二类与第一类相反,第三类为居间类型。居此,在造林生产中根据树种的生理特性,适地适树,创造良好的经济效益。     

含两参数的抛物型方程混合问题的差分解法

研究含２个小参数的抛物型方程的奇异摄动问题,构造了指数拟合差分格式并证明了差分格式的解一阶一致收敛于微分方程的解,提高了一致收敛的精度．     

抛物型方程的一个新的高精度显格式

本文给出了解抛物型方程的一个新的显式差分格式,截断误差达０（Δｔ３＋Δｘ４）,是同类的显格式中精度最高的．     

福州陶江中国淡水蛏Novaculina chinensis生殖周期的研究

采用活体性腺观察和组织切片法对福建闵候尚干陶江中国淡水蛏的生殖腺进行了初步研究,淡水蛏的性腺发育分为５期,增殖期,生长期,成熟期,排放期和休止期,一年只有一个繁殖周期,繁殖期为３月下旬至４月,雌雄异体,有雄性早熟现象,较晚期的卵母细胞和成熟卵子有双质核仁现象。     

Dissection of the pheromone-modulated flight of moths using single-pulse response as a template

The upwind flight of male moths to conspecific females is mediated by the chemical and structural characteristics of a pheromone plume. We describe the reaction of maleCadra cautella, the almond moth, to the interception of single pulses of sex pheromone, the smallest structural units of odour plumes. Following loss of a pheromone plume, males cast, that is fly a crosswind course without progressing upwind. The response of casting males to interception of a pulse of 0.25 s duration was, after a delay of 0.21±0.07 s, to turn and briefly fly straighter upwind, resulting in average net upwind displacements of 18 cm in a 50 cm s^–1 wind. Upwind progress in the single-pulse response was the result of steering more upwind and an increase in airspeed, although average ground speed remained unchanged. During the last third of the surge, males turned crosswind, returning to casting flight. These behavioural reactions to pheromone contact and loss support the phasic-tonic model of odour-modulated flight, in which an underlying tonic counterturning rhythm, expressed upon pheromone loss, is briefly overridden by phasic upwind surges, expressed upon interception of the pheromone filament. The surge portion of the cast-surge-cast response was diminished and more crosswind if individual pulses were shorter (0.02 s), probably due to sub-optimal contact with pheromone. The cast-surge-cast response to interception of a single 0.25 s pulse was used as a template to interpret the form of flight tracks in plumes of known structure. The template matched portions of flight tracks of males flying in plumes of low pheromone pulse frequency, thus reflecting the male's pattern of pulse encounter. In plumes ensuring a high frequency of pulse interception, only the upwind surge portion of the template was expressed, resulting in nearly straight upwind flight tracks. Similar nearly straight upwind flight tracks occurred in flights along plumes of low pulse frequency with large volume. Thus flight tracks of maleC. cautella to point sources of pheromone depend on both the frequency and the size of filaments encountered.     

Estrogen and accessory sex gland lipids

Summary Administration of estradiol-17 elicited differential responses on accessory sex glands of rats. In caput epididymis, the estrogen treatment led to an accumulation of glycerides and phospholipids while in cauda epididymis, there was no significant change. However, in seminal vesicles, depletion of phospholipids was observed In prostate, the treatment, resulted in an accumulation of glycerides.Part of Ph.D. Thesis. Umapathy, E., Thesis. University of Madras, India, 1977.     

循环经济发展模式与社会公众参与

循环经济发展模式的提出是可持续发展的必然要求，是适合我国具体国情的选择，也是科学发展观的题中应有之义。发展循环经济有助于推动整个社会走上生产发展、生活富裕、生态良好的文明发展道路。应该引导公众树立循环经济的新理念，积极倡导节约资源的生活方式和消费方式，并努力构筑公众参与循环经济的平台。     

MATLAB在等厚干涉中的应用

本文用 Matlab 软件定量描绘出了等厚干涉后能量随位置的变化曲线，并准确地模拟出了其干涉条纹的形态，对该 部分内容起到了辅助教学和加深理解的作用。     

纵论马克思主义建党路线的确立和发展--马克思主义党的建设理论研究系列之一

社会主义运动和无产阶级革命发展到现在,大体经历了三个不同的历史时代,即思想革命时代、政治革命时代、社会革命时代。党在三个时代的基本路线,就是思想革命路线、政治革命路线和社会革命路线。相应于社会主义运动的三个革命时代和党的三个时代的基本路线,党就有三个时代的不同的建党路线,这就是思想革命时代的思想建党路线,政治革命时代的政治建党路线和社会革命时代的社会建党路线。     

第指数函数与指数函数之比较

本文给出了第指函数的定义，讨论了第指数函数与指数函数的差异，结合它们的图象，分析了二者的不同特征。