投加硬硅钙纤维粒对UASB低温运行的影响

低温条件下(气温为14～17℃)投加硬硅钙纤维粒子对UASB运行的影响研究表明，由于硬硅钙纤维粒子特殊的物化性能，它可保证反应器在厌氧初期所需的碱度和启动期间的VFA基本上保持在正常状态。硬硅钙纤维粒子游离出的Ca2^ 为颗粒污泥的形成提供了有利条件，高浓度微生物以粒子为核心生长，形成纤维网状的结构骨干，加快了反应器中污泥的颗粒化进程，颗粒污泥沉降性能好，处理效率较高。     

好氧颗粒污泥的形成及其性质

综述了好氧颗粒污泥的研究进展 ,包括好氧颗粒污泥的基本特征和微生物相、好氧颗粒污泥形成的主要条件及其颗粒化过程、好氧颗粒污泥反应器等 .好氧颗粒污泥是近几年发现的在好氧条件下自发形成的细胞自身固定化颗粒 ,具有良好的沉淀性能、较高的生物量和在高容积负荷条件下降解高浓度有机废水的良好生物活性 .颗粒化过程是一个多阶段的过程 ,取决于废水组成、操作条件和适当的选择压等因素 .SBR反应器 (SequencingBatchReactor)有利于好氧颗粒污泥的形成     

不同粒度下制造业信息化的参考决策模型

从四个方面总结分析了当前制造业信息化过程中存在的主要不足,为解决这些问题,提出了在实施制造业信息化工程中可供参考的不同粒度下的制造业信息化参考模型,说明了不同粒度模型的应用范围和领域,就企业实施信息化过程的需求,提出了三个有针对性的策略,指出了在不同粒度下信息化参考模型对于企业信息化决策的参考价值,为制造业信息化企业实施信息化工程提供了一般性的参考工具。     

粗信息矩阵与其粒度矩阵特征

提出了粗信息矩阵、信息粒度矩阵、粗粒度矩阵的概念,给出了粗信息矩阵的结构及粒度特征;讨论了粗信息矩阵、粗粒度矩阵的性质及运算法则。给出粗信息矩阵与粗集、S-粗集的关系定理、粗信息矩阵与其粗粒度矩阵的关系定理,粗信息矩阵不仅是研究粗系统结构特征的新理论工具,而且是粗系统理论研究与应用研究又一个新的研究方向。     

高炉水渣系统转鼓控制的应用

分析了转鼓速度与转鼓转矩、转鼓内液位间的关系,建立了相关量间的数学模型,利用渣曲线的分段函数和转鼓内液位与转鼓转速的分段函数的合成来控制转鼓.针对控制系统对控制器参数的依赖,提出了经典开环、PID控制策略,并对控制方式进行了比较分析,得出了“应根据不同的现场情况灵活处理,才能达到最佳的控制效果”的结论.     

基于DSP的FDM挤出头控制系统设计

为实现FDM中挤出头控制和出丝的顺畅,提出一种基于DSP的挤出头系统控制方案。该系统主要由主控模块、电机模块和温度采集控制模块组成。通过主控芯片TMS320F2812的控制,利用热敏电阻模块、温度处理芯片MAX6675和电热筒完成挤出头的温度采集和控制,然后结合电机模块和外部的机械结构,顺利将ABS材料加热并从挤出头送出。通过调节挤出头温度、电机速度等参数,并经过大量的测试证明:在系统控制下,ABS材料的挤出效果良好。     

熔态塑料水下切粒机挤出模具

为了保护生态环境，国家加大了对废品回收再利用的力度，塑料制品回收机械不断涌现，直切式水下切粒机就是塑料在熔体状态下直接切粒的一种新型塑料回收机械。挤出模具是其关键零件之一。它的工作性能直接影响塑料切粒的质量、效果和生产率。因此根据实际工作条件和工作要求，通过查阅相关资料、计算分析和实验论证等方法。对挤出模具的出粒孔大小、数量、分布形状、模具材料选择和外形等作了全面设计，其技术指标达到生产厂家提出的设计要求。     

2-HEMA-g-Na-PCMS: A Novel Polymeric Matrix for the Controlled Release of Paracetamol

2-hydoxyethyl methacrylate (2-HEMA) was graft copolymerized with sodium salt of partially carboxymethylated starch (Na-PCMS). Thus prepared, graft copolymer (2-HEMA-g-Na-PCMS) was used as a polymeric matrix for preparing controlled-release tablets of paracetamol. Tablets of standard specification were prepared using the wet granulation method. Ingredients utilized for tablet preparation were 2-HEMA-g-Na-PCMS graft copolymer, paracetamol and excipients. Tablets were characterized for disintegration time (min), hardness, angle of repose and percent friability. It was found that tablets prepared by the compression of graft copolymer, excipients and drug in specified ratios resulted in an excellent controlled-release tendency of paracetamol.     

Scale-up and endpoint issues of pharmaceutical wet granulation in a V-type low shear granulator

A 3² factorial experiment is conducted in a 57 liter low shear granulator to evaluate the influence of changes in binder strength and agitator speed on the response variables of granule size, granule morphology, granule density and torque input. Results are compared to previous work in a 2 liter granulator and scale-up issues between the two granulators are addressed.     

Preliminary report of the discovery of a new pharmaceutical granulation process using foamed aqueous binders

Spray granulation is commonly used to improve the flow of drug formulation powders by adding liquid binders. We have discovered a new granulation process whereby liquid binders are added as aqueous foam. Initial experiments indicate that foam granulations require less binder than spray granulations, less water is added to the powder mass, rates of addition of foam can be greater than rates of addition of sprayed liquids, and foam can be added in a single batch to the surface of the powder mass for incorporation at some later stage in the process. This new process appears to have no detrimental effects on granulate, tablet, or in vitro drug dissolution properties. In addition, the elimination of spray addition reduces the complexity of the process and avoids the plugging problems associated with spray nozzles. Several formulations were successfully scaled up from laboratory scale (1.5 kg) to pilot scale (15 kg). Process control was good and there was no detrimental effect on tablet and drug dissolution properties. This paper also proposes a working hypothesis of the mechanism by which foam granulation operates.