抽屉式生物滤器在漠斑牙鲆循环水养殖中的效果研究

采用自行设计的抽屉式生物滤器应用于漠斑牙鲆(Paralichthys lethostigma)闭合循环水养殖系统,研究其对循环养殖水的处理效果及漠斑牙鲆的增重和饲料利用率的影响。结果表明:经过60 d的循环水养殖,漠斑牙鲆从初始时的(225.4±11.9)g增加到结束时的(337.5±10.3)g,增重率49.97%;试验饲料系数1.06,养殖密度24.1 kg/m3,成活率100%;抽屉式生物滤器对于NH4+-N、NO2--N和COD去除率分别为(10.61±1.88)%、(14.90±3.06)%和(16.11±1.70)%,可满足漠斑牙鲆养殖水体的水质要求。     

一种茶叶鲜叶分级机的研制

在茶叶生产过程中,鲜叶原料分级是其中重要工序之一。当前,茶叶生产企业普遍采用传统滚筒式鲜叶分级机进行分级,对于机采作业而然,存在着鲜叶分级等次少、分级效果差、损伤率高、不方便收集等系列问题,难以适应机采鲜叶的分级要求。针对于这一情况,我们设计了一种新型螺旋导向鲜叶分级机构。本设计增加了筛筒长度,将鲜叶筛选分为四级,增加了分选等级;同时,通过筛筒内设置的双螺旋导向叶片的阻隔作用,延长筛选时间,提升筛选质量,通过改变筛筒形状结构,选用新型复合材料和不锈钢材料,降低机械对鲜叶的损伤率;其次,采用抽屉式的收集结构,更方便筛选后鲜叶的收集。此外,采用风机进行初步分选,减少了鲜叶分级后短碎叶含量,提升了后续分选效果,通过这一系列的改进设计,有望整体提升鲜叶筛选的效率及分级效果,从根本上解决机采鲜叶的分级问题。     

国医大师段富津教授治疗胸痹心痛方剂配伍规律研究

目的 分析国医大师段富津教授治疗胸痹心痛用药方剂配伍规律。方法 基于SPSS Modeler数据挖掘软件,利用Apriori算法,对417例胸痹心痛临床跟诊病例,治疗用药的配伍规律进行分析,得出药物之间的关联规则。结果 在分析结果中得出胸痹心痛临床常见证型为气虚血瘀证与气滞血瘀证,常用的药物关联组合为当归和丹参,川芎和丹参,瓜蒌和郁金,黄芪和人参;当归、郁金和丹参,黄芪、人参和当归,川芎、郁金和丹参等。结论 段富津教授在胸痹心痛的治疗用药过程之中的方剂配伍常以补气、活血、宽胸理气的中药组合为主。     

湿地松人工林地径与胸径树高模型的研究

应用样木资料,采用多方程分析对比法建立胸径与地径及树高与地径的相关数学模型,所建立的模型平均相对误差低于2％,预估效果理想,从而为通过地径的测定,应用二元立木材积表测定湿地松人工林被伐木材积提供了科学依据,在实践上有应用价值。     

黎平黄牛体重估测公式探讨

随机实测２６１头黎平黄牛的胸围，体斜长和体重，根据体重等于体积乘以密度的原理，采用回归分析方法进行了黎平黄牛体重估测公式的推导与验证。结果表明，黎平黄牛的性别对体尺与体重回归关系的影响差异不显著，合并公母牛的体尺体重数据。得出该品种总的体重估测公式：体重＝胸围＾ｍ）＊体斜长（ｍ）＊８８－８（ｒ＝０．９９７１，Ｓｙ／ｘ＝４．７０１）。胸围，体斜长对体重的回归关系极显著。估测体重的离回归标准误为４．７     

五斗柜生产的工艺设计

家具生产是产品的种类、结构形式、加工方法、机械化程度、新材料的开发和利用、对生产的科学管理、产量和经济效益等方面相结合的一个工业体系。本设计就是通过了解家具生产的概况和特点、家具的材料、家具的结构及木质家具制造工艺过程等,合理地设计一件五斗柜并实现该类家具的工业化生产,进行其生产车间的工艺设计,解决实际生产中存在的技术问题。     

松突圆蚧危害与马尾松胸围关系的探讨

通过对马尾松胸围和松突圆蚧种群数量、枯梢率等的调查,结果表明:不同胸围马尾松之间的松突圆蚧种群数量不存在显著差异,不同胸围马尾松之间受松突圆蚧为害后的枯梢率存在显著差异,马尾松个体对营养和空间的竞争能力并不体现为对松突圆蚧的耐害或抵抗能力,该林分存在胸围越大的个体受松突圆蚧为害(枯梢)越重的趋势;对不同胸围马尾松之间松突圆蚧种群数量和枯梢率进行相关分析表明,马尾松胸围与松突圆蚧种群数量的相关性不显著,而与枯梢率呈极显著线性相关,其线性回归式为y=3 7821x-30 0479(y为枯梢率,x为胸围);松突圆蚧种群在树冠上、中、下层之间的分布不存在显著差异。     

THE RADIOGRAPHIC APPEARANCE OF THE PULMONARY VASCULATURE IN THE CAT

The purpose of this study was to determine the dimensions of the pulmonary arteries and veins in the cat, both in normal animals and those with evidence of intrathoracic disease. The radiographs of 50 normal cats, 35 cats with hypertrophic cardiomyopathy (HCM), and 15 cats with other intrathoracic disease were assessed. The normal range for the right cranial lobar artery compared with the proximal third of the fourth rib was 0.5-1.0, with a mean artery-to-rib ratio of 0.70 (standard deviation +/- 0.13). Normal cats had a mean vein diameter of (0.20 +/- 0.03 cm) (P = 0.034) compared with cats with HCM, which had a significantly greater mean vein diameter (0.22 +/- 0.04 cm).     

A Rertrospective Analysis of Pulmonary Contusion Secondary to Motor Vehicular Accidents in 143 Dogs: 1994 - 1997

Medical records of 143 dogs with pulmonary contusion secondary to motor vehicular trauma were evaluated retrospectively to determine length of hospitalization, oxygen supplementation, and associated injuries. Therapeutic interventions, including the dose of intravenous fluid administration, the use of antibiotics, and the use of glucocorticoids were recorded. Initial thoracicradiographs were reviewed, and pulmonary contusion was graded as mild, moderate or severe. Pulmonary contusion severity was compared to use of supplemental oxygen, oxygen administration time, hospitalization time, and the presence or absence of fractures. The length of hospital stay and the survival rate was calculated.
The mean respiratory rate at admission was 55 ± 22 breaths per minute. Concurrent thoracicinjuries were common, and included pneumothorax and pleural effusion. Fifty-two percent ofdogs received oxygen supplementation for a median of 35 hours. The median hospitalization time was 48 hours. Forty (28%) dogs were treated with antibiotics for a minimum of 5 days, and forty- five (31%) were administered glucocorticoids. Two (1%) dogs developed pulmonary infection. Dogs with more severe thoracic radiographic changes on presentation were more likely to receiveoxygen, received oxygen for longer periods of time, and had a longer hospitalization time. Eighty-two percent of dogs survived to hospital discharge.