海贝柱自动晾晒设备设计     

刘晓  侯加林  张观山  周伟 《渔业现代化》2017,44(5)

针对当前传统人工晾晒海贝柱效率低下、容易造成污染等问题。设计了海贝柱自动晾晒机械,采用阶梯式晾晒生产线对湿海贝柱分级晾晒,多条晾晒生产线分时、高效的工作,机器上方设有遮板以保证晾晒作业不被污染而且不受天气条件的影响。整机采用stm32单片机、传感器等技术实现自动化作业,机器控制系统监测到生产线发生故障或海贝柱出现堆积时会立即停止工作以便于检查故障、减少损失。试验结果表明:机械晾晒不会造成海贝柱内的营养成分的流失,机械晾晒海贝柱的干基含水率达到30%仅需12h,机械晾晒海贝柱能节省大量的干燥时间,显著的提高了晾晒效率,避免了人工晾晒过程导致的二次污染和损失。该研究为海贝柱自动晾晒机械的研制提供了技术参考。  相似文献   

计算机犬病诊断原理   总被引：1，自引：0，他引：1  

刘孟强  何保荣  刘桂荣  杨宝拴 《农业网络信息》2004,(7):11-13,31

本研究模拟人类专家的诊断过程,对常见犬病用计算机进行诊断模拟,试验建立了犬病诊断的计算机处理系统(QBZD)。本文主要阐述了QBZD系统的结构构成、诊断机理及操作应用  相似文献   

暖卫工程施工质量通病的发生与防治     

段长毅  何军  冉宪文 《林业科技情报》2001,33(2):51-51

本文论述了暖卫工程跑、冒、滴、漏、堵等五大质量通病的发生原因及防治方法建议等。  相似文献   

A novel approach to studying the effects of temperature on soil biogeochemistry using a thermal gradient bar     

N. Fenner    D. J. Dowrick    M. A. Lock    C. R. Rafarel  & C. Freeman 《Soil Use and Management》2006,22(3):267-273

The temperature dependence of chemical reaction rates and microbial metabolism mean that temperature is a key factor regulating soil trace gas emissions and hydrochemistry. Here we evaluated a novel approach for studying the thermal response of soils, by examining the effects of temperature on gas emissions and hydrochemistry in (a) peat and (b) soil from a Sitka spruce plantation. A thermal gradient was applied along an aluminium bar, allowing soil to be incubated contemporaneously from 2 to 18 °C. The approach demonstrated clear differences in the biogeochemical responses of the two soil types to warming. The peat showed no significant emission of CH₄ at temperatures below 6 °C, while above 6 °C, a marked increase in the rate of release was apparent up to 15 °C (Q₁₀ = 2.5) with emissions being similar between 15 and 18 °C. Conversely, CH₄ emissions from the forest soil did not respond to warming. Nitrate availability in the peat decreased by 90% between 2 and 18 °C (P < 0.01), whereas concentrations in the forest soil did not respond. Sulphate availability in the peat decreased significantly with warming (60%, P < 0.01), while the forest soil showed the opposite response (a 30% increase, P < 0.01). Conventionally, thermal responses are studied by incubating individual soil samples at different temperatures, involving lengthy preparation and facilities to incubate samples at different temperatures simultaneously. Data collected on a given thermal response is usually limited and thus interpolated or extrapolated. The thermal gradient method overcomes these problems, is simple and flexible, and can be adapted for a wide range of sample types (not confined to soil). Such apparatus may prove useful in the optimization of management practices to mitigate the effects of climate change, as thermal responses will differ depending on land use and soil type.  相似文献   

三因素随机区组试验结果统计分析的BASIC程序     

韩田夫 《东北农业大学学报》1989,(4)

本文提供了三因素随机区组试验结果统计分析的 BASIC 程序,可进行方差分析、计算标准差、判定差异显著性。该程序输入输出方式简单,容易掌握。  相似文献   

跑车带锯机列的电气改造     

鲁艳玲  李云峰 《森林工程》2002,18(3):28-28,30

本文通过对木工跑车带锯机列摇尺制动和摇尺操纵的电器改造，实现了摇尺自控和跑车摇控。提高了木材出材率，改善了工人的劳动条件。  相似文献   

关于水稻机插秧技术在泰和县试验示范的探讨     

尹国庆  梁景晟 《中国农机化》2004,(3):58-60

介绍了江西省泰和县进行水稻机插秧技术与手工插秧对比试验。对不同农艺的经济效益和不同育秧方式的适应性进行了分析，并指出了目前技术措施存在的不足之处。  相似文献   

黑木耳烘干控制系统的研究     

齐怀琴  李春林 《中国食用菌》2005,24(6):49-51

黑木耳烘干控制系统，采用压缩式热泵，AT89C51单片机、SHT75型温湿度传感器、加热器等组成温湿度控制电路。控制干燥室内的温湿度，完成对干燥室内的黑木耳进行低温、高效率的去湿干燥。  相似文献   

泥炭资源的基本属性、理化性质和开发利用方向   总被引：11，自引：0，他引：11  

刘永和  孟宪民  王忠强 《干旱区资源与环境》2003,17(2):18-18

本文探讨了泥炭资源的资源学属性,总结了泥炭资源的基本理化性质和各种泥炭 资源的开发利用方向对泥炭资源性质的要求。  相似文献   

The urbanization of wildlife management: Social science, conflict, and decision making     

Michael E. Patterson  Jessica M. Montag  Daniel R. Williams 《Urban Forestry & Urban Greening》2003,1(3):171-183

Increasing urbanization of rural landscapes has created new challenges for wildlife management. In addition to changes in the physical landscape, urbanization has also produced changes in the socio-cultural landscape. The greater distancing from direct interaction with wildlife in urbanized societies has led to the emergence of a culture whose meanings for wildlife are less grounded in the utilitarian/instrumental orientation of rural agrarian systems. Urban perspectives on wildlife are comprised of more highly individualized emotional/symbolic values. This shift creates two problems with respect to managing wildlife in an urbanizing landscape. First the increased diversity in values and meanings increases the likelihood for social conflicts regarding wildlife management while at the same time making socially acceptable resolutions more intractable. This in turn requires fundamental changes in decision-making paradigms and the research approaches used to inform decision making. Second, as remaining rural communities feel the pressures of urbanization, wildlife conflicts become conflicts not just over wildlife but conflict over larger socio-political concepts such as equity, tradition, private property rights, government control, power, and acceptable forms of knowledge. This paper examines the wildlife management implications of changes associated with increasing urbanization and employs two case studies to illustrate these issues. First a study of a controversy over urban deer management provides insights into how to map conflicting values and search for common ground in an urban culture with increasingly individualistic values for wildlife. Specifically, the analysis illustrates that common ground may, at times, be found even among people with conflicting value systems. The second case study examined a ranching community faced with predator reintroduction. This case study illustrates tensions that occur when the community of interest (i.e. a national public) is broader than the community of place in which the problem occurs. In this latter situation, the debate centers around more than just different views about the rights of animals. It also entailed the rights of individuals and communities to decide their future. The conclusion discusses the need for wildlife institutions to adapt their underlying decision making philosophy including the way science is integrated into decision making processes in light of the changes in social context caused by urbanization.  相似文献