基于Micro-CT的玉米籽粒显微表型特征研究

植物显微表型主要是指植物组织、细胞和亚细胞水平的表型信息,是植物表型组学研究的重要组成部分.针对传统籽粒显微性状检测方法效率低、误差大且指标单一等问题,本研究利用Micro-CT扫描技术对5种类型11个品种玉米籽粒开展显微表型精准鉴定研究.基于对CT序列图像的处理解析,共获取籽粒、胚、胚乳、空腔、皮下空腔、胚乳空腔和胚...     

从非盈利组织视角看民办高等教育

民办高等学校是一个特殊的非盈利组织,其办学活动处于公益与盈利的矛盾冲突之中,具有较强的独立性和专业性。由于多方面的原因,我国民办高校的市场化特征表现得非常明显,对我国民办高等教育的发展产生着重大影响。从非盈利组织视角看,获取公众支持和混合支持是私立（民办）高等教育发展的共同趋势。     

Soil Organic Carbon Density in Hebei Province, China：Estimates and Uncertainty

In order to improve the precision of soil organic carbon (SOC) estimates, the sources of uncertainty in soil organic carbon density (SOCD) estimates and SOC stocks were examined using 363 soil profiles in Hebei Province, China, with three methods: the soil profile statistics (SPS), GIS-based soil type (GST), and kriging interpolation (KI). The GST method, utilizing both pedological professional knowledge and GIS technology, was considered the most accurate method of the three estimations, with SOCD estimates for SPS 10% lower and KI 10% higher. The SOCD range for GST was 84% wider than KI as KI smoothing effect narrowed the SOCD range. Nevertheless, the coefficient of variation for SOCD with KI (41.7%) was less than GST and SPS. Comparing SOCD‘s lower estimates for SPS versus GST, the major sources of uncertainty were the conflicting area of proportional relations. Meanwhile, the fewer number of soil profiles and the necessity of using the smoothing effect with KI were its sources of uncertainty. Moreover, for local detailed variations of SOCD, GST was more advantageous in reflecting the distribution pattern than KI.     

人工智能辅助种植策略对温室草莓生产调控效果对比研究

人工智能（Artificial Intelligence,AI）辅助种植有助于提高设施园艺作物精准化管理水平、缓解日益凸显的劳动力紧缺问题。草莓是典型的劳动密集型园艺作物,研究对比采用不同AI种植策略和关键技术对草莓温室生产的调控效果,可对园艺作物种植的AI技术改进和产业化应用提供参考。本研究对比分析了4个不同AI种植策略对草莓生长发育和产量及品质的调控效果,并以人工种植管理为参照,对AI种植的技术特点和存在问题进行了分析。结果表明,知识图谱、深度学习、视觉识别、作物模型和作物生长仿真器等技术在草莓AI种植中各有优势。其中,AI-1组采用知识图谱技术将专家经验、作物数据和环境数据进行融合,建立了标准化草莓种植知识结构和智慧种植决策方法,对作物生产发育的调控较为稳健,以较低的投入获得了最高产值。与人工种植管理相比,AI种植策略组的平均产量提高了1.66倍,平均产值提高了1.82倍,最高投入产投比提高了1.27倍。针对高产优质的目标,在配备较完善的智能化设备和控制组件的温室生产条件下,AI辅助种植能有效提高草莓种植管控的精准度,减少水肥和劳动力的投入,获得较高的收益,但也存在对人工管理扰动的模拟难、作物本体信息采集难等问题。     

0.6m3水力碎浆机传动系统的设计

在水力碎浆机的设计过程中,传动系统的设计非常关键,因传动系统的设计直接决定了整台机器的性能、效率。传动系统将转距由电动机通过带轮传动、主轴传送至转盘、刀片,转盘的回转形成浆流的循环和物料的摩擦,加之转盘及槽体上安装的刀片的碎解作用,从而把物料碎解成浆。0.6m3水力碎浆机是专为造纸实验室而设计,该产品传动系统采用转子传动装置 皮带传动 立式电动机的结构形式,主要包括主轴、大皮带轮、轴承、轴承座、受浆盘和转盘等部件。与传统水力碎浆机设计不同的是,0.6m3水力碎浆机槽体内不设计传动结构,动力消耗少,运行平稳。     

后置式卷帘机安装使用方法及经济效益分析

介绍后置式大棚卷帘机的基本结构和工作过程,详细说明其安装技术要点,指出其在使用中应注意的事项,并对使用卷帘机和人工卷帘进行经济效益分析,证明使用卷帘机作业具有减轻劳动强度、节约作业成本、提高作业效率、增产增收等优点。     

The Buyer Cancellation Claim and the Tenant Priority Claim in Auction--Analyzing the Disputes in An Auction Case

Two problems often appear in estate auction.The first is to whom the buyer can claim cancellation of the contract,if he can't get the estate.The second is whether the tenant can still claim his priority to the estate.In auction,we can't use the principle of agency,fiduciary and mediation to explain the relations among client,auctioneer and buyer,because it doesn't accord with the auction practices and the Action Law section 40.The undisclosed agency in Contract Law may be an adapt explanation to the relations.According to the law hermeneutic,we should narrow the scopes of the tenant priority and exclude it from auction.     

Innovation of Construction Projects Management Based on the Five-dimension Modeling

Nowadays,the computer technology is applied more and more widely in the architecture,engineering and construction industries(AEC).This paper introduces a methodology of construction project management based on the five-dimension modeling which integrates three-dimension building models,resources and schedules by the development of virtual construction technology.The application of this method also influences several aspects of project management such as range,time,cost,resource,communication and information management.Finally,the process of 5D modeling and the management practice are presented through a real life case in Beijing which proves to be a more efficient,productive and economy project.     

Vehicles Scheduling Decision Support System

Under traffic conditions and vehicle capacity constraints, in view of commercial grou Plarge-scale vehicles Scheduling question characteristic, it proposes a solution framework. First, the customers are segregated into districts. Then the customer districts are assigned to vehicles using the vehicle scheduling model and heuristic algorithm. Third, the vehicle mutes are determined as a Traveling salesman problem. With the solution framework and by taking the a Chongqing commercial grou Pas the case, the authors designs the decision support system.     

Construction of Urban Barrier Free Environment Based on Dual-core Model

According to the investigations of urban barrier free facilities, there have been lots of progresses in constructions of barrier free in cities recently. But there are no systematic barrier free facilities in these cities, which would restrict the function and effect of urban barrier free facilities for the handicapped and the elder. This paper puts forward that there should be a development from the urban barrier free facilities to the urban barrier free environment. There are two parts in the barrier free environment,that is the hardy environment and soft environment. Finally,an in-series connection two-core model of barrier free environment has been designed and discussed.