沥青砂浆粘弹性断裂扩延分析及其断裂特性的推求

以沥青砂浆材料为例,通过薄板的蠕变断裂及单轴拉伸蠕变的试验结果和数据分析,推求出沥青砂浆在不同温度下的断裂特性参数Γ和σｍＩ１。     

服务台可修的GI／G／1系统

通过排队等价定理把服务台可修的ＧＩ／Ｇ／１系统转化为经典ＧＩ／Ｇ／１系统,得到了服务台可修的ＧＩ／Ｇ／１系统的队长,闲时,等待时间等排队指标的繁忙弱极限定理。     

一类非线性拟抛物方程的初边值问题

考虑一类非线性拟抛物方程ｕｔ－ｕｘｘｔ＋ｆ（ｕ）－ｇ（ｕｘ）ｘ＝ｈ（ｘ,ｔ）的初边值问题．证明了整体强解的存在唯一性,并讨论了对应非负初值解的非负性、正则性、渐近性及爆破问题．     

饥饿状态下南方鲇仔鱼的形态和行为变化

饥饿状态下的南方鲇仔鱼外形萎缩,脑顶下凹,外部器官发育受阻,身体长度和对照组存在显著差异．饥饿仔鱼的行为反应可分４个阶段：①集群趋暗阶段;②游动觅食阶段;③狂游阶段;④散慢游动阶段．对１８℃,２０℃,２４℃和２８℃４个温度组的观察结果表明,饥饿仔鱼的反应特征基本一致,温度越高,每一阶段持续时间越短．饥饿仔鱼具同类相残和吞食气泡的习性,同类相残行为与温度成正相关,胃肠吞有气泡的仔鱼数在中间温度组（２０℃,２４℃）较多,高温组（２８℃）和低温组（１８℃）均较少．     

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.     

白马鸡配对期两性行为的比较

2003年4月和2004年4月在四川省稻城县著杰寺采用瞬时扫描取样法对野生白马鸡(Crossoptilon crossoptilon)配偶行为进行了研究.结果表明,白马鸡配偶中雌、雄个体全天伴随活动,无特殊情况不会分离.在不受其他个体干扰的情况下,配偶移动时雌性多在前并控制移动方向.雌、雄鸟间距离平均为(1.75±0.03)m,在雄性驱逐其他个体时间距最大.在全天行为记录中,雄性警戒的时间最多,之后依次为取食、移动、驱逐、站立、休息和其他行为.雌性在一天中行为时间分配依次为取食、移动、休息、站立、警戒和其他行为.驱逐行为完全由雄性承担.两性共有行为中雄性用于警戒的时间显著高于雌性(P<0.05),用于取食、休息的时间显著低于雌性(P<0.05),用于移动和站立的时间与雌性差异不显著(P>0.05).     

板柱结构的应用研究

通过对国内外板柱结构研究成果的总结与分析,得出结论:国内外对板柱节点的静力性能研究较多,对其动力性能,尤其是板柱结构体系的动力性能研究较少;认为有必要对其进行动力性能的实验研究;并提出了钢筋混凝土板柱结构抗震设计建议方法。     

高校图书馆数字化建设中的特色服务

数字化时代，高校图书馆要利用自身优势，在数字化建设中做出自己的特色，即服务内容上突出学术性，大力发展多媒体型信息；服务方式上依托校园网，拓展数字化信息服务；服务形象上体现高素质，做好信息导航服务。     

试论现代图书馆的人文精神

通过对图书馆人文精神内涵及发展的阐述，指出了网络环境下图书馆的人文精神的严重缺失问题，从而提出了现阶段图书馆倡导人文精神的必要性及其具体实践途径。     

公共图书馆如何做好老年读者服务工作

老年读者服务工作是构建和谐社会的重要组成部分,为此,研究和分析了老年读者的心理特点和阅读特点,并提出图书馆做好老年读者服务工作的要点.