风险厌恶下的供应链收益共享契约协调模型研究

收益共享契约是实现供应链系统绩效改善或完美协调的一种机制.考虑了零售商与供应商分别具有风险厌恶决策偏好情况下，在随机市场需求下建立了由单供应商和单零售商组成的二级供应链的收益共享契约模型，并对模型进行了分析，揭示了供应商和零售商的风险厌恶决策偏好对收益共享契约参数的影响.研究结果表明：当销售商（供应商）的风险厌恶控制在一定程度内时，通过调整收益共享契约参数，可以保证供应链的协调.     

新型莫西菌素浇泼剂对羊蜱蝇和消化道线虫驱虫药效评价

试验旨在通过新型莫西菌素（moxidectin,MOX）浇泼剂对羊的驱虫试验,评价MOX浇泼剂对羊蜱蝇和消化道线虫的临床药效。将150只阿勒泰羊经产母羊随机分为6组,每组25只,分别为不用药对照组、螨净药浴组、MOX注射组和MOX低（0.05 mL/（kg·BW））、中（0.1 mL/（kg·BW））和高（0.2 mL/（kg·BW））剂量浇泼组,试验期为1周。试验第1天按前述分组中方法和剂量驱虫1次。观察受试动物临床表现,测定给药前1天和给药后第7天体温、脉搏和呼吸（TPR）,血液生理、生化和尿常规指标;测定羊蜱蝇减虫率、治愈率。采取粪样测定消化道线虫每克粪中虫卵个数（EPG）减少率及转阴率。结果显示,与不用药对照组相比,给药后第7天各驱虫组TPR、血液生理、生化及尿常规指标均无显著差异（P>0.05）。螨净药浴组羊蜱蝇减虫率为43.7%,而MOX注射组及MOX低、中、高剂量浇泼组均为100%。螨净药浴组治愈率为13.0%,而MOX注射组及MOX低、中、高剂量浇泼组均为100%;与不用药对照组相比,螨净药浴组消化道线虫卵减少率为0,而MOX注射组及MOX低、中、高剂量浇泼组分别为91.6%、93.1%、94.9%和97.8%。螨净药浴组虫卵转阴率为0,而MOX注射组及MOX低、中、高剂量浇泼组分别为77.0%、69.2%、69.2%和84.6%。本试验结果表明,新型MOX浇泼剂对体外寄生虫和消化道线虫均有显著疗效,且优于螨净药浴,与MOX注射剂等效。实践应用中最适MOX浇泼剂量推荐为0.05 mL/（kg·BW）（即0.25 mg/（kg·BW））。     

The Software System for Computation and Drawing of Ship Properties

The softwa re system suggested in this paper is applied to replace the traditionalhanded-computation forms. It uses the cubic sample interpolation and numerical integral,and is writ-ten with FORTRAN according to the accurate formula. With this software system,the nine sorts ofcomputation results of ship properties can be obtained. The system is con nected through SCR filewith AutoCAD,and ean draw automatically eleven sorts of pictures according to the computation re-sults.     

Friction and Wear Characteristics of Plastic Alloy Bearings under Different Lubricating Condition

Ultra High Molecular Weight Polyethylene (UHMW-PE) is a kind of high anti-wear engineering plastic with many excellent physical and mechanical performances. It has been widely applied in the field of mechanism such as bearing and pump. Effect of load, speed, time on friction and wear properties of Ultra High Molecular Weight Polyethylene(UHMW-PE)plastic alloy bearings under different Lubricating Condition are studied by using MPV-200 model friction and wear testing machine. The test results show that water lubrication reduces the friction coefficient of bearings but increases the wear rate as compared with dry friction. At the same time, wear mechanisms are analyzed systemically. It provides a theoretic basic for practical application of plastic alloy bearings     

对三农问题和农村城市化问题的若干思考

中国是一个农业大国，农业经济状况在很大程度上决定了整体经济的发展态势。对中国当前农业发展现状中的主要问题进行分析，认为只有积极进行城市化建设才能解决中国农业发展的根本问题，同时，就中国城市化的路径选择与城市化发展的中短期目标提出自己的看法。     

江苏省水稻节水灌溉技术推广模式

针对江苏省稻作区水资源、土壤、气候的特点 ,选择浅湿灌溉、浅湿调控灌溉、控制灌溉、水稻旱作灌溉等 4种技术因地制宜进行推广。在灌溉过程中 ,建立和完善了一整套的组织措施和技术措施 ,形成了江苏省水稻节水灌溉技术推广模式 ,取得了显著的效果 ,丰富了水稻节水灌溉技术推广的内容     

超高压技术在粮食产品加工中的应用

超高压技术是一种非热加工技术,因具有杀菌、保持食品原有营养成分、护色等特点,在食品行业的应用已越来越广泛。目前,超高压技术在粮食产品加工方面的应用发展较快,随着对该技术研究的不断深入,其在粮食产品加工中所发挥的作用也越来越受关注。阐述了国内外超高压技术在粮食产品淀粉改性、蛋白质改性、成分提取、致敏性降低、贮藏(灭菌灭芽)等方面的研究进展,分析了各方面研究结果的意义、应用价值和前景,并对今后应重点关注的研究方向提出了建议。     

葡萄糖和尿素对新鲜水稻秸秆氨化品质的影响

为研究葡萄糖和尿素对新鲜水稻秸秆氨化品质的影响,采用不同质量分数的葡萄糖(0、4 g/kg)和尿素(0、2、4和6 g/kg)对水稻卓两优141的新鲜秸秆进行氨化处理,常温氨化50 d后开包取样分析各项指标。结果表明:氨化饲料中黄曲霉毒素、伏马毒素、玉米赤酶烯酮含量检测结果符合饲料卫生标准;尿素和葡萄糖的交互作用对氨态氮、可溶性碳水化合物和半纤维素含量有显著作用。随着尿素浓度的增加,各处理的pH值显著升高,氨态氮和粗蛋白(CP)含量显著增加,6 g/kg尿素处理组的中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)、酸性洗涤木质素(ADL)降解效果最好;4 g/kg葡萄糖处理显著降低了秸秆NDF、ADF、ADL和氨态氮含量,显著增加了秸秆可溶性碳水化合物(WSC)和粗蛋白(CP)的含量。综合分析,添加葡萄糖可以提高水稻秸秆的营养价值,4 g/kg葡萄糖+6 g/kg尿素处理组的氨化效果最佳。     

水稻骨干亲本育种价值分析

在介绍粳稻丰锦、辽粳5号、盐粳32、盐粳68等来源及特点的基础上,以配合力为指标,分析了这4个品种的产量性状的遗传潜势,结合系谱分析,论证了骨干亲本的育种价值,并探讨了骨干亲本的利用方式。     

High-Quality de novo Genome Assembly of Huajingxian 74, a Receptor Parent of Single Segment Substitution Lines

Rice(Oryza sativa L.)is grown nearly worldwide and provides the staple food for more than half of the global population(Luo et al,2017).The genomes of several cultivated rice varieties including Nipponbare(NPB)(Kawahara et al,2013;Sakai et al,2013),IR64(Tanaka et al,2020),93-11(Zhang et al,2018)and R498(Du et al,2017)at chromosome level,and Minghui 63 and Zhenshan 97(Zhang et al,2016)at scaffold level have been assembled,annotated and released,among which the R498 and NPB genomes are widely used as reference genomes in rice research.However,there are thousands of rice cultivars,landraces and wild rice varieties in the world with dramatically different genetic backgrounds,and the genomes of native rice varieties in South China,which is one of the major rice production areas in China,have not been de novo assembled.Huajingxian 74(HJX74)is an indica rice variety bred in South China Agricultural University,Guangdong Province with widely environmental adaptability and high yield(www.ricedata.cn/variety/varis/602548.htm).HJX74 exhibits significant phenotypic and genetic differences from those varieties whose whole genomes have been properly sequenced and assembled(Fig.1).