光电课程设计的教学改革探索

光电课程设计是电子科学与技术专业重要的一门实践课程,在当前的课程设置中存在实践项目单一,内容偏向光电器件设计,电子电路方向存在严重不足。为了课程能更贴合光电产业的发展,结合电子科学与技术相关的比赛项目,挑选了智能小车和无人机作为主要方向,拆分出不同的模块,组成了不同的实践项目,把学生分组完成不同的模块功能项目,并结合各自模块实现整体的智能小车和无人机。组成教学科研团队,对学生的进度进行时时跟踪,组织学生团队交流和指导成员讨论实验项目,对可行性进行论证。让光电课程设计项目和毕业设计相结合,鼓励学生提早进入毕业设计流程,培养符合专业发展要求的人才,为本地的光电产业发展提供专业性人才。     

信息技术在放牧绵羊福利中应用的研究进展

文章介绍了智慧畜牧业在国内外的发展,并对智能监测技术在放牧绵羊福利研究中的应用进行了阐述,内容包括音频分析、视觉检测、行为监测、行为特征识别、卫星定位和无人机巡航技术等与草原福利化绵羊养殖生产密切相关的共性行为的监测技术及应用研究现状,并展望了绵羊放牧养殖监测技术后续研究方向。     

无人机航测技术及其在土地整治项目中的应用探讨

本文简要介绍了无人机航测的特点,结合贵州省土地整治项目测绘技术要求,以笔者参与完成的两个土地整治项目为依托,对无人机航测技术在该领域的应用进行了介绍,并就无人机航测技术及成果在土地整治活动中各个阶段的应用进行探讨。     

我国智能畜牧业进入黄金窗口期 畜牧业增长势头强劲

<正>2019年4月2日,中国畜牧业协会智能畜牧分会成立大会新闻发布会在京召开,标志着我国智能畜牧业进入一个新的历史发展阶段,将为智能畜牧产业营造一个数据动态、数据即时、数据真实、数据共享、网络安全、平台开放、共享共生的生态环境。中国畜牧业协会智能畜牧分会将以协同创新、集群集约、智能融合、高效生态为导向,     

基于网络的无人机巡检作业仿真培训交互系统设计与开发

针对目前无人机巡检作业培训方式单调、用户体验不佳的现状,文章首先提出了基于网络的无人机巡检作业仿真培训交互系统设计方案,并基于功能及业务需求,从网络架构、硬件平台和软件平台阐明了方案的实现路径.最后应用案例表明,该系统利用理论学习与交互操作配合的方式,能够实现个人及班组的无人机巡检作业项目的仿真培训,有助于构建协同高效...     

无人机技术在草原研究和管理中的应用

无人机具有机动、灵活、作业范围大、用途多等优点,是草原管理越来越重要的工具。世界范围内,无人机技术的应用研究还处于起步阶段,因此,系统地梳理发展现状,分析无人机技术在草原管理的应用和发展前景,对于无人机技术的发展至关重要。为此,本文总结了近年来无人机技术在草原植被和土壤监测、放牧家畜和野生动物监测与管理、草原生物灾害和气象灾害的评估与管理等方面的进展;总结问题所在,展望应用无人机与传感器、遥感器、人工智能等结合的前景,以期为促进无人机技术在草原管理的作用提供参考。     

坚持产业一体化发展 推动现代奶业建设——杨凯

<正>通过十多年的不懈努力,辉山集团建设了全产业链乳品产业集群项目,逐步形成涵盖牧草种植、饲料加工、奶牛饲养、乳品加工与销售等各环节的全产业链经营模式,开创了中国奶业"从田间到餐桌"的产业一体化发展模式。辉山产业一体化发展包括以下4个方面。     

(一)关于做强做大中国肉牛产业让中国肉牛产业走向世界的提案

<正>1关于给予肉牛产业优势发展省份重点集群化政策支持近年来,国家大力支持肉牛全产业链发展。一是实施产业融合项目。农业农村部会同财政部实施农业产业融合项目,支持建设以肉牛为主导产业的农业产业强镇43个,其中包括吉林省镇赉县黑鱼泡镇、通榆县十花道乡,支持吉林等11个省份建设肉牛优势特色产业集群。二是加强主体培育。农业农村部会同国家发展改革委等部门立足优势主导产业,培育壮大农业产业化龙头企业,带领广大农户共同发展。     

河北省将对智能奶牛场、生产乳粉用奶牛场、高产奶牛胚胎移植进行补贴

正近日,河北省农业厅和河北省财政厅联合下发了《关于印发2018年乳粉业发展项目实施方案的通知》(以下简称《通知》),其中涉及智能奶牛场建设、生产乳粉用奶牛场建设和高产奶牛胚胎移植项目。《通知》要求申请项目单位条件:智能奶牛场建设,支持对象为存栏300头以上的奶牛养殖场,通过     

企业

<正>京东农牧与中天羊业签约智能养殖项目近日,京东农牧公司(以下简称"京东农牧")与甘肃中天羊业股份有限公司(以下简称"中天羊业")在甘肃省兰州市举行了战略合作签约仪式。京东农牧将作为中天羊业智能养殖项目战略合作伙伴,助力兰州市新区生态农业示范园向智能化、数字化发展。据了解,为推进园区的智能化、数字化建设,京东农牧与中天羊业在充分交流和对接的基础上,签订了合作协     

癸氧喹酯干混悬剂含量测定的改进

采用高效液相色谱法测定癸氧喹酯干混悬剂的含量,在2-250μg/mL范围内,峰面积的常用对数与进样量浓度的常用对数呈良好的线性关系,R^2=1(n=5),平均回收率为99.24%~99.51%,RSD在0.05%~0.28%。此方法分析时间短,样品前处理简便、定量结果准确,重现性好,结果满意,为其质量控制提供了依据。     

商会自治的基石——商会自治规范研究

在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。     

猪毛色遗传的研究进展

本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。     

Comparison of 2 methods of centesis of the bursa of the biceps brachii tendon of horses

REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air.     

不同样本商品蜂蜜中硒含量的测定

用硝酸和高氯酸消化蜂蜜,使硒游离出来,在微酸性环境下,硒和2,3-二氨基萘(DAN)生成有较强荧光的物质,用环己烷萃取,在激发波长378nm,荧光波长518nm处测定其荧光强度。蜂蜜中硒含量范围:0.10～0.82μg/g。表明:蜂蜜应视为天然富硒营养品。     

乳酸杆菌益生作用机制的研究进展

乳酸杆菌作为益生菌广泛用于人和动物。本文综述了乳酸杆菌改善宿主健康的机制。乳酸杆菌可通过产生抗菌物质如乳酸、过氧化氢、细菌素,或者通过竞争营养或肠道黏附位点来抑制致病菌;通过诱导黏附素的分泌或阻止细胞凋亡而增强肠道的屏障功能,从而保护肠道。文章重点讨论了乳酸杆菌表面成分（表面蛋白、脂磷壁酸和肽聚糖）与肠道受体（Ｃ型凝集素受体、Ｔｏｌｌ样受体和 Ｎｏｄ样受体）,阐述了他们结合后启动免疫调节信号,调控肠道免疫功能以发挥改善健康作用的机制。     

中华人民共和国农业部公告 第267号

为贯彻落实《兽药生产质量管理规范》(简称《兽药GMP》),进一步推动兽药GMP实施进程,我部制定了《兽药生产质量管理规范检查验收办法》,现予公告。本公告自2003年6月1日起施行。附件:兽药生产质量管理规范检查验收办法二○○三年四月十日第一章 总则 第一条 为推动《兽药生产质量管理规范》(以下简称兽药GMP)的实施,规范兽药GMP检查验收工作,制定本办法。 第二条 农业部负责全国兽药GMP管理和检查验收工作;负责制修订兽药GMP检查验收管理规定;负责兽药GMP检查员队伍建设和监督管理工作,负责国际兽药贸易中GMP互认工作。 …     

鸡败血支原体垂直传播模式及其阻断方法

以国际标准强毒Ｒ株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离ＭＧ,并收集感染鸡所产蛋分离ＭＧ。结果表明,人工感染４８小时后上、下呼吸道及肺已被全面感染,９６小时气囊已被感染,１２０小时输卵管已能分离到ＭＧ,卵巢始终分离不到ＭＧ。人工感染鸡自１４４小时便能在其所产蛋中分离出ＭＧ。药物治疗能在７２小时内消除感染,油乳剂苗则需２４天后逐渐降低蛋内ＭＧ分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内ＭＧ,但以研制的种蛋浸泡剂药浴效果为最好。     

Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF

Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo.