羽绒脱脂干燥设备及脱脂干燥工艺研究

本研究设计的羽绒脱脂、干燥设备及其相应工艺，具有脱脂、除臭效果好的特点。由于对电加热式烘干设备采用绝热技术，使得其热效率达到９０％，比同类烘干机节电３０％左右。经脱脂、烘干后的羽绒成品。其质量达到和超过国家规定的出口标准，此外，文中还提供了搅拌功率设计计算式中的经验常数和热效率的计算方法。     

变频恒压控制系统在日光温室蔬菜滴灌中的应用研究

恒定转速的机电泵无法调节泵的特性与实际变化的运行状况相适应。针对日光温室蔬菜基地的用水特点和加压滴灌技术应用中存在的问题 ,根据电动机的变频调速原理 ,提出了利用变频恒压控制系统调节水泵电机转速来满足管网不同需水量时压力恒定不变的要求 ,并通过工程试验进行了经济效益分析 ,认为该系统应用在日光温室蔬菜滴灌中具有显著的节水节能及增产效益 ,实用性强 ,应用前景广阔     

建筑热工用动态热流计及其标定方法的研究

首次研制了建筑热工用动态热流计，设计并制造了标定装置，研究了以系统辨识理论为基础的标定方法，从理论上证明了动态热流计及其标定方法的可靠性，标定实验结果表明，热流计动态特性及温度误差均能满足建筑热工测试要求。     

Thermal resistance traits of the clonal silver crucian carp Carassius langsdorfii and evaluation of these traits using primary culture cells

The thermal resistance traits of three clonal lines of the silver crucian carp Carassius langsdorfii (SCC-1, -2 and -3) were investigated. Individual juvenile fish reared at 20°C were exposed to thermal stress at 36.5 ± 0.5°C and their death times during this exposure were measured. The death times of SCC-2 and SCC-3 fish were 66.6 ± 31.2 and 144.7 ± 49.8 min, respectively. In contrast, all SCC-1 fish survived under these conditions. Furthermore, the thermal sensitivity of primary culture cells from each clone was determined at 37, 40 or 43°C by the Trypan blue assay. Under all treatment conditions, the thermal sensitivity of the SCC-1 primary cultures was lower than those of the others. These results estimated the correlation between the in vivo and in vitro thermal resistances. Therefore, the use of primary culture cells to evaluate thermal resistance could be a useful method of selection breeding.     

CH_3OD在Si(111)表面上的TDS研究

本文运用热脱吸附谱方法(TDS)研究了室温下CH_3OD在Si(Ⅲ)表面上的吸附,对所取得的H_2, HD及D_2的热脱吸附谱进行了分析和比较,并计算出它们的脱吸附能和预指数因子.     

烟蚜茧蜂,菜蚜茧蜂各个虫态及世代发育起点和有效积温的研究

通过解剖，观察、记录烟蚜茧蜂与菜蚜茧蜂各个虫态，接蜂至形成僵蚜和接蜂到出峰的发育历期，依据有效积温法则，计算出两种蚜蜂各虫态及世代发育起点的有效积温，由此推算出在北京地区烟蚜茧蜂常年平均发生１７代，最多１９代，菜蚜茧蜂平均１７代，最多１８代，最少１６代。     

Effects of meperidine or saline on thermal, mechanical and electrical nociceptive thresholds in cats

ObjectiveTo measure cutaneous electrical nociceptive thresholds in relation to known thermal and mechanical stimulation for nociceptive threshold detection in cats.Study designProspective, blinded, randomized cross-over study with 1-week washout interval.AnimalsEight adult cats [bodyweight 5.1 ± 1.8 kg (mean + SD)].MethodsMechanical nociceptive thresholds were tested using a step-wise manual inflation of a modified blood pressure bladder attached to the cat’s thoracic limb. Thermal nociceptive thresholds were measured by increasing the temperature of a probe placed on the thorax. The electrical nociceptive threshold was tested using an escalating current from a constant current generator passed between electrodes placed on the thoracic region. A positive response (threshold) was recorded when cats displayed any or all of the following behaviors: leg shake, head turn, avoidance, or vocalization. Four baseline readings were performed before intramuscular injection of meperidine (5 mg kg⁻¹) or an equal volume of saline. Threshold recordings with each modality were made at 15, 30, 45, 60, 90, and 120 minutes post-injection. Data were analyzed using anova and paired t-tests (significance at p < 0.05).ResultsThere were no significant changes in thermal, mechanical, or electrical thresholds after saline. Thermal thresholds increased at 15–60 minutes (p < 0.01) and mechanical threshold increased at 30 and 45 minutes after meperidine (p < 0.05). Maximum thermal threshold was +4.1 ± 0.3 °C above baseline at 15 minutes while maximum mechanical threshold was 296 ± 265 mmHg above baseline at 30 minutes after meperidine. Electrical thresholds following meperidine were not significantly different than baseline (p > 0.05). Thermal and electrical thresholds after meperidine were significantly higher than saline at 30 and 45 minutes (p < 0.05), and at 120 minutes (p < 0.05), respectively. Mechanical thresholds were significantly higher than saline treatment at 30 minutes (p ≤ 0.05).Conclusion and clinical relevanceElectrical stimulation did not detect meperidine analgesia whereas both thermal and mechanical thresholds changed after meperidine administration in cats.     

基于EOS/MODIS的青海草原春季干旱监测模型

采用对地观测系统/中分辨率成像光谱仪（EOS/MODIS）白天、夜间两时相的资料,应用热惯量监测土壤湿度的基本原理,通过拟合计算,建立了土壤湿度和热惯量之间的线性和对数模型,并选择线性模型为干旱监测的基础模型。对辐射方法反演温度和直接反演温度2种方法进行了分析比较,认为直接反演温度法计算简便、易于实际应用。针对热惯量模型只能监测裸地土壤湿度的缺点,给出了归一化植被指数（NDVI）订正方法,初步拟合计算,青海地区Kn值为3。对草原干旱的定义,沿用青海省地方灾害标准。通过以上分析,建立了青海省草原春季干旱遥感监测模型。经实际监测应用,认为在青海范围内可替代人工取土监测土壤湿度。     

Effects of two fentanyl constant rate infusions on thermal thresholds and plasma fentanyl concentrations in awake cats

Objective

To determine the pharmacokinetics and effects on thermal thresholds (TT) of two fentanyl constant rate infusions in awake cats.