地下库不同气调方式经济效益分析

通过智能充氮系统和常规充氮技术的对比试验,探讨智能充氮系统的经济效益及社会效益。试验表明,智能充氮系统与常规充氮技术在经济效益方面接近,但在社会效益方面,智能充系统具有工作效率高、劳动强度低、作业安全系数高的特点。     

充氮气调压盖与不压盖控温效果探讨

通过比较充氮仓粮面压盖与不压盖控温效果,来说明仓房充氮时粮面需不需要用隔热材料压盖粮面控温。     

平房仓晚籼稻谷充氮气调储藏试验

平房仓充氮储藏晚籼稻谷,先用复合膜对粮堆“五面”密闭,并有效处理工艺孔洞、工作间等漏气部位,利用移动式制氮机组通过四个进气口结合上充下排、下充上排和仓内环流或环流风机强排等工艺向粮堆充氮。近三个月氮气储藏过程中,氮气浓度维持在95％范围,杀虫率达到100％,并能有效防止害虫发生,次年害虫发生时间推迟近一个月;存粮脂肪酸值年变化量低于1．5（KOH）mg／100g,2009年充氮储藏期内脂肪酸值仅增加0．7（KOH）mg／100g;粮温变化趋势与常规储藏基本一致,但试验仓平均粮温偏高1℃～1．5℃,局部最高粮温变化提前近15d。     

立筒仓智能充氮气调储粮控制系统应用

本文通过对立筒仓粮堆应用智能充氮气调储粮控制系统,解决了因立筒仓气调储粮体积大、粮堆高、充氮储粮作业时间长引起的设备操作繁琐、设备故障暂停操作等问题,实现了立筒仓气调储粮智能化,有效减少了保粮人员工作量,充分发挥了循环利用尾气功能,节约了气调杀虫成本,提高了充氮效率。     

不同存储条件对芝麻调和油品质的影响

本文对比了抗氧化剂TBHQ、充氮罐装、PET、PE、玻璃瓶包装对芝麻调和油储存稳定性的影响,跟进了产品货架期18个月中过氧化值、酸价的变化。结果表明,过氧化值是芝麻调和油的敏感指标,在存储条件下,充氮罐装产品过氧化值稳定;不同包装物对比表明,白色PET瓶最差,玻璃瓶最佳。     

浅圆仓环流降氧工艺研究

本文主要对环流充氮工艺进行研究,结果表明：以氮气95%和98%两种浓度比以90%、95%和98%三种浓度进行阶段环流充氮可以节能40%左右;氮气浓度95%保持35天能够抑制锯谷盗、赤拟谷盗和书虱等的生长发育甚至死亡;在密闭保持期间氮气在粮堆中以相似的速度进行自由扩散,而且当仓内氮气浓度大于95%后继续进行补氮成本将大幅增加。     

氮气储粮平房仓全过程沉降监测

以河南工业大学内建设的模拟平房仓为沉降观测对象,观测模拟仓在压仓整个过程的沉降变化情况,并重点观测其中充氮过程中墙体基准点的标高变化。最后对比一个完整进出粮过程之后粮仓底部地坪沉降量与墙体沉降量,比较二者一致性。粮仓进出粮和充氮过程中的沉降变化具有很高的实用价值,为确保粮仓使用过程中仓体自身结构安全正常使用提供参考。     

如何避免充氮焊接对四通阀的影响

通过分析空调实际生产发现的关于四通阀换向不良的原因,总结出管路充氮焊接时氮气流向对四通阀滑块的影响,给出了具体的解决方案和通用的工艺操作方法.     

充氮气调储粮3种充气工艺经济效益比较

本试验对充氮气调储粮3种充气工艺在对粮堆充入同量的氮气条件下使用何种工艺可以取得最低氧浓度(最高含氮量),取得最理想的杀虫效果即最佳经济效益进行了探索。试验证明,密闭条件下从粮面向粮堆充气,当气囊鼓起使粮膜离开粮面时,在向粮堆继续充气的条件下打开地槽口排气阀排气,当打开地槽口排气阀后继续充入的气量相当于粮堆内空气量时停止充气,停止排气,将仓房密封好,环流均匀后氧浓度最低(氮浓度最高),吨粮成本最低。     

充氮气调储粮实仓应用试验总结

为适应储粮方式多样化"高质量、高效益、低损耗、低污染、低成本"的发展,要降低磷化氢药剂的使用量,福建省储备粮管理有限公司漳平直属库对储粮进行智能管理,所有仓廒覆盖充氮气调管道,并于2017年4月对充氮气调储粮进行了设备试机和实仓应用试验。     

高等院校学分制收费模式的比较与创新

目前我国实施学分制的院校收费有两种模式：一是按学年收费,二是按学分收费。在权衡两种不同收费模式的利弊、分析教育成本内涵和构成的基础上,提出了按学生在校学习时间加学分收费的新模式。     

基于现有技术条件下我国电动汽车商业化之路

目前我国电动汽车的发展进入了瓶颈阶段,即无法实现商业化。制约电动汽车商业化的障碍主要有:电池充电时间长,效率低;整车价格贵、汽车整体运行成本高;缺乏足够的充换电网络和专业的维修网点。在现有技术条件下解决电动汽车商业化的有效途径是采取换电模式,其优点为:没有技术障碍问题、换电站投资成本低、缩短车辆的等待时间、提高电池的使用寿命、降低电池的使用成本。目前应由国家制定统一的电池标准和充电设备等标准,并依托中石油、中石化、南方电网等央企来构建充换电网络。     

地下库低氧富氮结合惰性粉储粮技术探索

通过对地下库包装粮垛分别采用低氧富氮、低氧富氮结合惰性粉两种储藏技术实验的效果对比,低氧富氮技术结合惰性粉相对于单独使用低氧富氮效果更佳。     

Arrow: A flexible architecture for an accounting and charging infrastructure in the Next Generation Internet

Current pricing and charging methods for the Internet are not based on actual usage of this service, which leads to unfairness and more important, it does not deliver the right signals through financial incentives to network providers to upgrade critical links of their networks. The development of new multimedia applications and the convergence to an integrated services network will foster the tremendous growth of the Internet even more. With the Next Generation Internet not only technical services like bandwidth reservation will be introduced, but also new applications will emerge within the Internet. Charging the Internet in a fashion that provides feedback to users and providers has been proposed since the early '90s, however, only a few implementations and real-world examples are known today. This is due to subsidizing the Internet in its early stages and due to a technical development that did not care much about charging. With the recent redesign of the Internet protocol suite and discussions on multiple service classes in the Internet, architectures for charging and accounting have to be revisited, too. Economic models for the Internet cannot be tested fully and validated in non-real-world environments, because of the unknown user behavior. With this uncertainty over what models and pricing schemes to choose, it is evident that a specific charging and accounting platform will never be accepted by the community. In this paper a novel and flexible architecture for charging and accounting is proposed that provides a wide range of mechanisms and lets researchers experiment in an environment as close as possible to the targeted system. As a first step, four different pricing schemes are described, qualitatively assessed on the proposed platform, and a prototypical implementation performed. One of the economic models that have been implemented on Arrow is based on different service classes including reservation and recalculates prices dynamically depending on the traffic situation. This revised version was published online in August 2006 with corrections to the Cover Date.     

总氮空白值过高原因分析

在水质总氮分析中,经常出现空白吸光度偏大的现象,本文从作者在总氮分析中寻找空白吸光度偏大的原因来分析测定过程中的影响因素,并进行全面的论述分析,可以给我们的实验操作带来指导作用。     

浅析工程量清单计价模式存在的问题

工程量清单计价作为一种新的计价模式被引入到建设工程造价领域,使建设工程造价计价方式从定额计价模式向清单计价模式转变,推动了建筑市场的健康、有序发展。但在推行工程量清单计价的过程中也存在《计价规范》分类不全、计价依据缺位、评标方法不合理等问题,文章提出了相应的解决对策。     

Network impacts of distance-based road user charging

Distance-based road user charging is being seen as one potential mechanism to implement national road charging schemes. This paper investigates the design aspects of universal distance-based charging schemes and incorporates procedures within a detailed network supply model to represent how a range of different permutations of distance-based charges across a given network (charging regimes) affect route-choice, travel characteristics and demand for road space. The results suggest that distance-based charging can reduce number and length of trips, congestion, accidents and pollution, and provide net economic benefits and revenues. However, these benefits are not found to be uniform throughout the network. Their magnitude largely depends on the charge level, the hierarchy of charges across the network, and the difference between the charge levels.     

合理调整我国高等教育收费标准的路径

在简述国际通行的高等教育收费理论和我国现行政策的基础上,分析了我国高等教育收费方面存在的问题,提出了制定高校收费标准必须考虑的因素和合理调整我国高等教育收费标准的对策。