PREDICTIVE INTELLIGENT CONTROL OF THE COLD STORAGE     

Cao Changxiu Wang WanLiang 《保鲜与加工》1989,(5):68-75

The predictive intelligent control scheme is proposed, which is based on approximation theory and numerical method of Chcbyshev orthogonal polynomial. It has the practical value to the cold storge using widely electromagnetic valve and can be also applied similar systems in orther area.  相似文献   

Land Storage System: Effect, Problem and Its Legal Regulation     

HUANG Xi-sheng~  TANG Shao-jun~  WANG Bao-xin~ 《保鲜与加工》2004,(2)

The authors suggest that the land storage system is beneficial not only to strengthen the country's macroscopic regulation of city land market, accelerate healthy development of city economy and increase the financial income, it can also be advantageous to carry out the economic reform and public facilities construction without a hitch. On the basis of this, in this paper, the increment of the land price and house price as well as the high risk of fund due to lack of related laws is analyzed. Corresponding legal regulations, such as polishing the legislation of land right, implementing the land utilization planning, reinforcing the legislation of city development, land requisition and countryside residential land administration are put forward.  相似文献   

CO2-O2混合喷吹对铁液中C、V元素氧化的影响     

文钢  王雨  堵伟桐 《保鲜与加工》2015,(5):66-72

为了验证用CO2替代部分O2进行转炉氧化提钒的可行性,在实验室进行了CO2-O2混合喷吹提钒模拟实验。结果显示C的氧化量与C的氧化速率随CO2含量的增加而升高;V的氧化量随CO2含量的增加而降低,其中CO2含量为20%与纯O2对C、V的氧化量接近;纯O2喷吹时C的氧化量为34.56%,V的氧化量为96.85%;CO2含量为20%混合气体喷吹时C的氧化量为36.83%,V的氧化量为93.29%;以V的相对氧化量与C的相对氧化量的比值(ΔV/ΔC)来衡量提钒保碳能力,CO2含量为20%的最终ΔV/ΔC为5.96,CO2含量,40%、60%、80%的最终ΔV/ΔC均小于3.8;反应前期,V的氧化速率随CO2含量的增加而升高,反应后期V的氧化速率随CO2含量的增加而降低。  相似文献   

A STUDY ON HEAT AND MOISTURE STATE OF HULL LAYER FOR THERMAL INSTULATION OF A COLD STORAGE     

Chen Qigao Feng Ya 《保鲜与加工》1993,(1)

This paper analyses the thermal moist characteristics of the hull layer beside an air layer at lower temperature in an envelope for a cold storage and presents a new method of waterproof by air layer. With test data from engineering practice, the theory on the barrier of self moisture proof at the surface sublayer of the hull layer in an attic on a cold storage is proven. The dried zone about three phase point is confirmed. It is a new knowledge for thermophysics on thermal design of a cold storage with an optimum thermal performance.  相似文献   

以粮温实测数据为例探讨低温储粮的可行性   总被引：1，自引：0，他引：1  

张前 《粮食储藏》2004,33(3):3-6

通过对高大平房仓粮温进行跟踪检测，分析比较了粮温变化情况，并探讨了低温储粮的可行性。  相似文献   

高氨氮厌氧消化液后处理技术研究   总被引：2，自引：0，他引：2  

宋国梁  邓良伟 《中国沼气》2007,25(2):7-10

采用SBR-絮凝沉淀-Fenton氧化-活性炭吸附组合工艺对高氨氮厌氧消化液的后处理进行实验研究.结果表明,当进水COD浓度为4516 mg·L^-1时,SBR出水COD可降为1752 mg·L^-1,去除率达到61.2%;絮凝沉淀出水COD浓度为1189 mg·L^-1,去除率为32.1%;Fenton氧化和活性炭吸附出水COD浓度分别为452和216 mg·L^-1,去除率分别为61.7%和52.7%.当进水NH3-N浓度2162 mg·L^-1时,SBR出水NH3-N浓度降至13.8 mg·L^-1,去除率为99.4%,NH3-N主要在该段去除.整个组合工艺对COD和NH3-N的去除率分别达到95.2%和99.9%,达到了很好的有机物和氨氮去除效果,在技术上是可行的.  相似文献   

温室地下贮热系统设计研究   总被引：4，自引：1，他引：4  

王永维  苗香雯  崔绍荣 《农机化研究》2004,(1):137-139

为了降低温室环境调控能耗。根据育苗不同阶段对气温与土壤温度的要求，设计了温室地下贮热系统，并阐述了系统的组成和贮热原理；同时，分析了各设计参数对系统贮热性能的影响。这样不仅为系统设计与理论分析奠定了基础，对其它类似地下贮热系统的设计、研究也具有参考意义。  相似文献   

柴油机燃用菜籽油的耐久性试验研究     

叶丽华  施爱平  张春丰 《农机化研究》2007,(11):205-207

柴油机燃用菜籽油植物油的短期耐久试验证明了植物油可作为一种代用燃料,但同时也暴露出了一系列的问题.试验后观察试验柴油机的主要零部件可看到:燃烧室的表面有大量的积碳、喷油器结焦、气门黏滞、缸套轻微刮伤等现象.这导致了柴油机性能的下降、油耗的升高和经济性的下降.其中,喷油器结焦和气门黏滞是性能下降的主要原因.  相似文献   

干旱地区家庭雨水集储装置的设计     

刘兰桂  全腊珍  汤兴初 《农机化研究》2004,(3):115-117

宁夏甘肃两省是我国严重缺水地区。缺水严重影响了该地区人民正常生活和工农业的发展。为此，针对家庭用水设计了屋顶雨水集储装置；在尽量减少建筑费用的情况下，选用了地下建池、拦污栅等污水处理装置，可为干旱地区建造家庭雨水集储装置提供一些参考依据。  相似文献   

Can carbon sequestration markets benefit low-income producers in semi-arid Africa? Potentials and challenges   总被引：1，自引：0，他引：1  

Carlos Perez  Carla Roncoli  Constance Neely  Jean L. Steiner 《Agricultural Systems》2007

The Clean Development Mechanism (CDM) of the Kyoto Protocol of the United Nations Framework Convention on Climate Change allows a country that emits C above agreed-upon limits to purchase C offsets from an entity that uses biological means to absorb or reduce greenhouse emissions. The CDM is currently offered for afforestation and reforestation projects, but may apply subsequently to sequestration in agricultural soils. Additionally, markets outside of the Protocol are developing for soil C sequestration.  相似文献