珠江磨刀门河口悬沙浓度变化特征分析

根据2011年枯季和2012年洪季在大、中、小潮期间的多点同步现场观测资料,分析研究了磨刀门河口悬沙浓度变化特征。结果表明:磨刀门口悬沙浓度纵向分布呈近岸高,远岸低的趋势;横向分布具有季节性差异,洪季主槽大于滩地,枯季滩地大于主槽;垂向分布洪季主要以斜线型分布为主,枯季主要以抛物线型分布为主。潮周期平均含沙量大潮普遍大于中、小潮;洪、枯季磨刀门口外落潮含沙量普遍大于涨潮含沙量。洪季含沙量混合较为均匀,落潮时含沙量增大,涨潮时含沙量减小,枯季含沙量分层明显,。受波浪潮汐作用,一个周期内有多次明显的再悬浮过程,涨潮时增大,落潮时减小。     

负载硫化镉的碳纳米管载镉量分析

经高温灰化法预处理后用配位滴定分析法测定负载硫化镉的碳纳米管(CdS/CNTS)的载镉量,测试数据可靠准确,表明制备负载硫化镉碳纳米管催化剂时所加入的镉并不全部吸附在碳纳米管上,载镉效率随着碳纳米管载镉量的增加而降低。     

热媒炉热效率分析与提高

分析了影响热媒炉热效率的主要因素 ,介绍了通过对热媒炉盘管干冰除灰和改进风油比控制方式来提高热效率的方法 ,指出提高热媒炉热效率的主要途径是 :降低排烟温度和空气过剩系数。     

Coupling of dry matter and nitrogen accumulation in ryegrass

The logistic model has proven very useful in relating dry matter production of warm season perennial forage grasses to applied nitrogen. A recent extension of the model coupled dry matter and plant N accumulation through a common response coefficient c. The objective of this analysis was to apply the extended logistic model to cool season Gulf annual ryegrass (Lolium multiflorum Lam.) and to establish a common response coefficient c between accumulation of dry matter and plant N. Analysis of variance established the validity of this hypothesis. The model accurately described response of dry matter, plant N removal, and plant N concentration to applied N, with an overall correlation coefficient of 0.9954. Furthermore, the model closely described the relationship between yield and plant N removal, as well as between plant N concentration and plant N removal. The logistic equation is well-behaved and simple to use on a pocket calculator. It can be used to estimate yields and plant N removal in evaluation of agricultural production and environmental quality.     

大坝集团2500t/d烧成系统生产实践

介绍了山东德州大坝集团旋窑水泥厂2500t/d新型干法生产线烧成系统的主机配置和工艺技术特点,重点介绍了该线3个月的试生产调试期和投运第一年生产运行中烧成系统遇到的预热器结皮、高温风机振动、煤粉水分偏高和篦冷机冷却效果差等问题分析及其解决方法.目前该线产量稳定在2750t/d左右,熟料强度超过60MPa,年设备运转率达85%以上.     

Partition coefficient of diglycerides in crystallization of palm oil

Crystallization of palm oil with and without solvent was carried out over a temperature range of 10–25°C. The yields of olein, the diglyceride contents, and compositions of the stearin and olein phases were determined by thin-layer and gas-liquid chromatography. The three major diglycerides, analyzed as C₃₂, C₃₄, and C₃₆, are mainly dipalmitoyl glycerol, palmitoyloleoyl glycerol, and dioleoyl glycerol. In crystallization without solvent, C₃₂ (PP) had a strong affinity for the stearin fraction and C₃₆ diglycerides concentrated in the olein phase. The partition coefficient of diglycerides between the olein and stearin phases was temperature-dependent and was influenced by the type of solvent used. Although solvent enhances the diglyceride partition into the olein phase, partitioning is more effective at low temperatures and with acetone as the solvent for fractionation.     

五氧化二锑胶体的制备及应用

叙述了以锑白为原料，用双氧水氧化法制备水系及有机系五氧化二锑胶体的过程，并介绍了五氧化二锑胶体的应用。     

Synthesis of Compositionally Homogeneous Sr(CuxZn1−x)1/2W1/2O3

A complex perovskite of Sr(Cu _x Zn_{1- x} )_1/2 W_1/2O₃ (SCZW) is synthesized by a new combination of wet and dry processess. Mixed oxides containing Cu²⁺ and Zn²⁺ (CZ) are prepared by the wet process (coprecipitate method). SCZW is obtained by the dry process (mixed-oxide method) from a mixture of CZ, SrCO₃, and WO₃. SCZW has practically no compositional, unlike solid solutions prepared by the conventional dry method. The wet–dry process method is useful because the wet process is applied to only B-site cations having the same valence.     

日本钢管福山焦化厂简介

介绍了福山焦化厂备煤、炼焦和化产回收系统的工艺及设备情况,并对煤调湿及干熄焦部分作了详述。     

串联式干气密封在液态烃泵上的应用

从理论上对干气密封的作用机理及影响干气密封性能的主要参数进行了研究。对液态烃泵用串联式干气密封的结构进行优化，设计制造出了适合轻烃类介质的串联式干气密封及控制系统，工业运行获得成功，极大地提高了液态烃泵的性能及可靠性。