内蒙古霍林郭勒市人感染病例触发的畜间炭疽紧急流行病学调查

2020年8月25日,内蒙古霍林郭勒市出现一例疑似人炭疽病例。为查明当地是否存在潜在的动物感染,以确定感染来源,通辽市农牧局立即成立专家组,赴霍林郭勒市指导开展畜间炭疽紧急流行病学调查工作。专家组询问病人及其家属了解病史,同动物疫病控制机构相关人员座谈,了解家畜养殖及疫情情况;对该患者饲养的羊只及储存的动物产品和环境样品进行实验室检验,同时指导当地开展畜间紧急流调排查以及紧急免疫和消毒工作。调查发现:患者有去山林活动且被刺伤史;经排查和实验室检测,未发现畜间炭疽疫情及异常病死动物。综合调查结果,可排除患者通过接触畜间动物及其产品感染的可能,推测被环境中炭疽芽孢杆菌感染的可能性极大。调查提示,该地山林环境中存在炭疽芽孢杆菌污染,因而存在人畜感染风险,须加强防范,做到早发现、早处置,防止人畜炭疽的传播和扩散。     

不同播量拉巴豆与青贮玉米混播对草地生产性能及牧草品质的影响

为探究宁夏雨养区不同播量拉巴豆(Dolichos lablab)与青贮玉米(Zea mays)混播对草地生产性能和牧草品质的影响,本试验采用随机区组设计,以不同播量(0 kg·hm^-2,22.5 kg·hm^-2,45.0 kg·hm^-2,67.5 kg·hm^-2,90.0 kg·hm^-2)的拉巴豆与青贮玉米混播,并运用灰色关联度法对各处理进行了综合评价。结果表明,青贮玉米单播的鲜、干草产量分别为82.09 t·hm^-2和25.21 t·hm^-2,显著高于青贮玉米与播量为45.0 kg·hm^-2,90.0 kg·hm^-2拉巴豆混播(P＜0.05);不同播量拉巴豆与青贮玉米混播饲草的粗蛋白、粗灰分、中性和酸性洗涤纤维含量较青贮玉米单播均有不同程度的增加。经灰色关联度分析,拉巴豆播种量为22.5 kg·hm^-2与青贮玉米混播综合性状排名第一,优于其它混播处理和青贮玉米单播,可作为宁夏雨养区适宜播种量推广。     

Effects of Cultivars,Transplanting Patterns,Environment, and Their Interactions on Grain Quality of Japonica Rice

With the increasing scarcity of rural labor, the rice transplanting pattern is encountering a shift from artificial transplanting (AT) to mechanical transplanting (MT) in numerous rice‐growing districts of China. The shift of transplanting patterns combined with altered growing environment during the grain‐filling stage in different years presumably affects rice quality. Nevertheless, related information is currently limited. This study investigated the effects of cultivars, transplanting patterns, environment, and their interactions on appearance, milling, eating, and nutritional qualities of four japonica rice varieties. The significant interactive effects of cultivars, environment, and transplanting patterns on almost all rice quality parameters (except Thr, Met, and Ile) were observed. Cultivars and environment were the main factors influencing rice appearance and milling and eating qualities. Cultivar was the primary factor affecting rice nutritional quality. Among all treatments, environment showed the strongest effect on percentage of chalky kernel, milled rice yield, peak viscosity, breakdown, setback, consistence, amylose, Glu, Tyr, and Met contents. However, Leu and Phe contents were unaffected by environment but only by cultivars and transplanting patterns. In addition to amylose and protein, Glu and Met contents were also involved in determining rice eating quality. Amino acid contents (except Cys, Tyr, and Met) were significantly negatively correlated with head rice yield, showing the function of amino acids in controlling rice milling quality. Percentage of chalky kernel as well as protein and almost all amino acid contents were significantly negatively correlated with the difference of maximum and minimum temperature (DMMT) and positively correlated with relative humidity (RH), whereas head rice yield did it reversely. Amylose content and setback were significantly negatively related to daily maximum temperature (DMAT), daily minimum temperature (DMIT), daily average temperature (DAT), and effective temperature accumulation (ETA). However, peak viscosity, breakdown, and consistence had contrary performances. According to these results, we can infer that DMMT and RH are important environmental factors affecting rice appearance, milling qualities, and nutritional qualities and that DMAT, DMIT, DAT, and ETA are key environmental factors influencing rice eating quality.     

覆膜防沙治沙方法

沙漠、沙尘暴和沙化问题已经成为威胁人类生存的头号敌人，如何根治沙漠、沙尘暴和沙化是摆在人类面前的十分紧迫的任务。覆膜防沙治沙方法的研究和提出，成功地解决了人类面临的重大防沙治沙难题。为人类征服自然，征服沙漠树立了信心。介绍了覆膜防沙治沙的技术方式、方法、原理和覆膜栽培技术，供防沙治沙工程参考和推广。     

LM-BP神经网络水质评价模型应用研究——以新乡市卫河为例

介绍了LM-BP神经网络模型的原理及算法和模型的优点。针对实际水质评价问题,利用随机内插方法在地表水环境质量分级标准阈值间生成训练样本和检验样本,建立了新乡市卫河地面水环境质量综合评价的LM-BP神经网络模型,将模型应用于卫河2011年3月份、9月份的水质评价,并与单因子评价法、模糊综合评价法进行了比较分析。实验结果表明该模型设计合理,泛化能力强,收敛速度快,算法稳定,推导严谨,有较充分的理论依据,应用于水质评价具有其合理性、实用性和有效性,适用于作深入的水环境质量分析。     

基于ARM的育苗架智能监控系统设计

为了解决当前育苗过程中环境参数控制不便等问题,提出一种新的基于嵌入式ARM平台的育苗架智能监控系统。该系统搭载嵌入式Linux操作系统,采用Pt100温度传感器和NWSF-1AT湿度传感器,以及加热、加湿装置,可以对育苗架内的环境参数进行实时监测和智能控制。系统采用Modbus通信协议和RS-485数据接口,利用Qt开发用户界面,同时包含数据库功能,能够自动记录历史数据,便于后续的数据分析。大量实验表明,本系统可以实时监测育苗架内温湿度变化,当设定期望温度为25℃、湿度为40%RH时,能够有效地将育苗架内的温湿度环境稳定在设定值,能够为催芽育苗工作提供所良好的内部环境。     

System of Scanning Tunneling Microscope

Some ideas are given about using out-clock, CPU and anti-T-net of D/A card for getting to the intelligent control of scanning voltage ,low-filter and hign-filter of STM; logarithm amplifier for tunnelling current contraction. At last, some applications and questions when it running about STM are discussed.     

Optimality Conditions for Nonsmooth Extremum Problems in Topological Vector Spaces

Some new concepts of coneD_s convexity,coneD-s quasiconvexity,cone D-s pseudoconvexity,s right derivative of vector value mapping are proposed;and their related properties are discussed;the optimality necessary conditions and sufficient conditions for constrained extremum problem(VP)involving in cone D-s convex mapping are extablished;the relation between local optimal solution and global optimal solution;as well as the relation between weakly efficient solution and efficient solution for (VP) are derived;the corresponding results generalize the related results of classic convex programming.     

Ananlysis on the Liability Financing in Leverage Buyouts

This article briefly introduces the principle and the character of the leverage buyouts since the rate of finance lever and the risk is high in the LBO, this article gives a game-theory analysis on the financing process between the purchaser and the investor in LBO by using the ROSS model. It is expected that some beneficial proposal to either side can be put forward by parting the equilibrium.in the last, it poses that LBO can be a way of broadening the financing channel on the annexation between the enterprises in our country.     

An Analysis on China Neutral Technological Progress by Embodied Spillovers from North America

This paper empirically discusses the mechanism of China Neutral Technology by Embodied Spillovers from North America, and the effect on China economic growth. The simulations show that the effects of technology spillovers on both the innovating and the receiving economies depend on SS and AC. The three sectors spillovers of North America can improve China's Hicks-neutral technological progress, but only the third industry can increase the output of same industry of China, and decrease the output of other two industries. Based on the simulations, some advices are given on China trade policy.