Hilbert空间中渐近非扩张半群不动点的粘性逼近研究

研究了Hilbert空间中渐近非扩张半群不动点的粘性逼近,得到了渐近非扩张半群不动点的强收敛定理。     

A New Method of Second-Order Analysis of Thin-wall Member

In this paper, based on the theory of the rotation of a cross section around a fixed axis, a new calculation method of second-order stress of space stability for thin wall member is applied. The example given in this paper shows that the conception of this new method of second order analysis is clear and the calculation procedure is concise.     

固定效应对槟榔江水牛体重影响的研究

[目的]槟榔江水牛为我国目前为止发现的唯一本土河流型水牛,具有产奶性能高、肉用性能好的特点,为了进一步阐明槟榔江水牛的生长发育规律,本文收集云南腾冲县巴福乐槟榔江水牛2004~2011年生长发育数据资料,研究性别、月份和年度等固定效应对体重的影响。[方法]应用SAS分析性别、月份、年度等非遗传因素对槟榔江水牛体重的影响,并且用MTDFREML软件分析了固定效应值。[结果]本研究结果表明,槟榔江水牛性别对初生重具有显著影响,公犊平均初生重(35.04kg)显著高于母犊(32.63kg);月份对母牛初生重没有显著影响,公牛的效应值比母牛的较大。[结论]月份对槟榔江水牛的体重有显著的影响,可能与饲料的季节性供给有关。     

半干旱地区沙地景观破碎化趋势分析--以科尔沁沙地为例

采用RS和GIS手段,对科尔沁沙地典型地区不同时期的农田和固定沙丘景观数量和形状破碎化的趋势进行分析,结果表明：农业生产活动对农田景观的影响丰要表现在对斑块数量破碎化的影响,而对斑块形状破碎化的影响不大。放牧过程对固定沙丘景观破碎化的影响非常显著,这一过程不仅影响到斑块数量破碎化,而且也影响到斑块形状破碎化。回归分析结果,二者为较复杂的抛物线型关系。此外,沙漠化过程对农田和固定沙丘景观破碎化影响的关联分析表明,沙漠化过程与所有的破碎化指数呈负关联。其中,除农田形状破碎化指数外,其他破碎化指数与沙漠化过程无显著的关联,说明随着沙漠化程度的增大,农田斑块的形状简单化的趋势也加强。     

派丽奥软膏治疗固定义齿修复后再发牙周炎的疗效观察

目的观察派丽奥(米诺环素)软膏治疗固定义齿修复后再发牙周炎的疗效。方法选择自身配对固定义齿修复后再发慢性牙周炎患者48例共96颗牙,随机分成派丽奥组(n=48)和碘甘油组(n=48),观察8周后临床症状、牙周袋探诊深度(PD)、菌斑指数(PLI)、龈沟出血指数(SBI)改变。结果派丽奥组总有效率(76.4%)明显优于碘甘油组(45.1%)(P<0.01),PD、SBI、PLI值均比碘甘油组低(P<0.01)。结论派丽奥软膏治疗固定义齿修复后再发牙周炎有明显疗效。     

西方蜜蜂长期定地饲养存在的问题和解决办法

为了弄清近年来西方蜜蜂长期定地饲养存在的问题和解决的办法,通过剖析存在的问题,采取相应的解决办法,摸索出一套适合本地的西方蜜蜂定地饲养技术很有必要。     

Effect of body condition score and reuse of progesterone‐releasing intravaginal devices on conception rate following timed artificial insemination in Nelore cows

This study had the aim of investigating the efficiency of timed artificial insemination (TAI) through the progesterone‐releasing intravaginal device (PRID), used in new condition and for the second and third times in Nelore cows. The effects of device reuse and body condition score (BCS) on the conception rate (CR) were evaluated in 1,122 multiparous Nelore cows (mean BCS of 2.7 ± 0.4), which were randomly distributed into three groups that received new (n = 330), once (n = 439) and twice used (n = 353) PRID. Among the 1,122 females that underwent TAI, 573 became pregnant, thus representing an overall CR of 51.06%. Cows with BCS between 2.75 and 4.0 had greater (p < .0001) CR (69.75%) than cows with BSC of 2.0–2.5 (32.98%). It was observed that the CR through using PRID was 60.00%, 51.71% and 41.93% for new, once and twice used PRID, respectively, with difference between all groups (p < .0001). Under tropical conditions, animals with BCS greater than 2.5 had a higher CR, and the CR decreased proportionally with the number of times that the PRID had been used.     

科学发展给力油茶产业发展方式转变

针对目前油茶产业发展中存在的问题,用科学发展观的思想理念,提出了＂10个突破,10个增强＂,即：突破油茶是小品种油的思维定势,增强油茶大产业意识;突破油茶是＂露水财＂的思维定势,增强＂绿色银行＂意识;突破传统发展思维定势,增强科技发展意识;突破小户经营思维定势,增强集约化经营意识;突破粗放经营思维定势,增强园艺化管理意识;突破节点发展思维定势,增强产业链发展意识;突破无机发展思维定势,增强有机生态发展意识;突破手工耕种思维定势,增强机械化、自动化耕种意识;突破单纯发展油茶思维定势,增强复合发展意识;突破低端产品思维定势,增强高端品牌发展油茶产业意识。从而促进油茶产业又好又快发展。     

复杂山地森林固定大样地测设方法

简述了森林固定大样地测设基本要求;以南方地形复杂、森林茂密、通视性差的山地为例,从坐标原点确定、建立闭合导线和全站仪放样等方面介绍了复杂山地森林固定大样地闭合导线测设方法。