捣固焦炉大型化与SCP机国产化探讨

分析了捣固焦炉大型化的优点,介绍了捣固、装煤、推焦机械的主要形式.阐述了6.25m捣固焦炉捣固、装煤、推焦机械国产化的必要性,对其工艺配置及投资情况与引进技术进行了比较,提出了捣固焦炉大型化和SCP机国产化的具体建议.     

基于PDM协同设计任务建模与调度方法研究

从产品数据管理系统中协同设计过程任务建模的角度出发,提出基于产品结构分解的协同设计过程人员-任务分配模型,建立任务结构的约束映射和基于可扩展着色Petri网的任务过程建模方法,实现Multi-agent协同设计过程任务调度集成框架,最后进行了系统实现.     

Submerged yeast fermentation of acid cheese whey for protein production and pollution potential reduction

Bench-scale batch bioreactors were used to study the effectiveness of cheese whey fermentation for single-cell protein production using the yeast Kluyveromyces fragilis in reducing the pollution potential of whey as measured by solids, chemical oxygen demand (COD) and nitrogenous compounds concentrations. The four principal phases (lag, exponential, stationary and death) encountered in the history of a microbial culture grown under batch conditions were clearly recognized in the growth, temperature and dissolved oxygen curves. The lactose concentration and soluble COD displayed three distinct phases corresponding to the lag, exponential and stationary phases of the yeast growth. The minimum dissolved oxygen and maximum temperature observed in this study (at an air flow of 3 VVM, a mixing speed of 400 rpm and an ambient temperature) were 2.49 mg/L and 31.6 degrees C, respectively. About 99% of lactose (90.6% of soluble COD) was utilized after 28 h. The total COD continued to decline due to cell death resulting in a reduction of 42.98%. The total nitrogen concentration remained unchanged while the organic nitrogen increased during the exponential phase and then declined during the death phase. The ash content remained unchanged while a substantial reduction (56%) of the volatile solids was observed. These results indicated that sufficient oxygen for yeast growth was present in the medium and no cooling system was needed for this type of fermenter under similar experimental conditions. Recovering the yeast biomass with ultrafiltration reduced the total COD by 98% of its initial value in the raw whey.     

A quadratic approximation for structural topology optimization

In topology optimization, it is customary to use reciprocal‐like approximations, which result in monotonically decreasing approximate objective functions. In this paper, we demonstrate that efficient quadratic approximations for topology optimization can also be derived, if the approximate Hessian terms are chosen with care. To demonstrate this, we construct a dual SAO algorithm for topology optimization based on a strictly convex, diagonal quadratic approximation to the objective function. Although the approximation is purely quadratic, it does contain essential elements of reciprocal‐like approximations: for self‐adjoint problems, our approximation is identical to the quadratic or second‐order Taylor series approximation to the exponential approximation. We present both a single‐point and a two‐point variant of the new quadratic approximation. Copyright © 2009 John Wiley & Sons, Ltd.     

智能网SCP的两级软件容错策略研究

指出了目前ＳＣＰ在实现方面存在的缺陷，针对其结构和运行机制，提出其软件具有系统级与呼叫级的两级并发性，并基于这个两级并发模型对它的软件容错途径进行了深入的探讨与研究。首次提出了应用软件出错情况下保证所有在线呼叫可靠处理的容错目标，并在ＳＣＰ系统级与呼叫级两个并发层次上给出了切实有效的容错策略或算法。最后对ＳＣＰ软件系统有效度的估算进行了进一步讨论。     

电焊机动态参数测试仪的研究

介绍了由单片微机构成的电焊动态性能测试仪的结构、原理及实用电路，设计了系统软件及与通用微机的接口，实现了信号的采集、处理、分析以及对被测系统进行测试、建模等多种功能。实验表明：该仪器具有功能强、精度高、操作灵活、使用方便及可靠性高等特点。     

基于J2EE的移动智能网SCP监控平台的设计与实现

该文提出了一种基于J2EE的模式来设计和实现移动智能网SCP监控平台的新方法。这种方法采用多层体系结构,使用两级鉴权机制,业务逻辑处理在EJB服务器层执行,从而有效保证了SCP的性能、安全性和稳定性。     

动态扰动辅助的串行抵消双比特翻转Polar译码算法

针对串行抵消翻转译码算法（Successive Cancellation Flip,SCF）受限于单比特翻转而性能提升有限问题,提出了一种双比特翻转译码算法（Successive Cancellation Flip with 2 Bits,SCF2）。针对SCP算法扰动方差初始值固定的问题,设计了一种扰动方差可随码长和码率变化的改进SCP算法。在此基础上,结合翻转和扰动机制,提出了一种动态扰动辅助的串行抵消双比特翻转（Dynamic Perturbation-Aided SCF2,DPA-SCF2）译码算法,并对其译码复杂度和性能进行了分析。仿真结果显示,相比于列表长度为4的循环冗余校验辅助串行抵消列表（Cyclic Redundancy Check Aided Successive Cancellation List,CA-SCL）译码算法,所提算法最大可获得约0.5 dB的性能增益。     

啤酒废水SCP发酵菌种的筛选及其发酵条件初探

本文选用啤酒酵母、酵母Y399、热带假丝酵母三个菌株 ,对啤酒生产中两种主要废水进行了处理。确定了单细胞蛋白的发酵条件和优选菌种     

生产SCP菌株生物转化无机锌的研究

主要研究四株生产单细胞蛋白(Single Cell Protein,SCP)优良菌株对无机锌生物转化的性能。通过对四株菌株的耐锌实验及驯化培养,优选出产朊假丝酵母对无机锌生物转化能力最佳。应用正交实验对影响产朊假丝酵母富集无机锌的培养条件进行考察,结果表明,产朊假丝酵母生物转化无机锌的最佳培养条件为:麦芽汁糖度12°Be',ZnSO4浓度800μg/mL,pH5.0。此条件下在麦芽汁培养基中接种经驯化的产朊假丝酵母,30℃,100r/min培养48h,细胞生物量为(13.9±0.57)g/L,细胞锌含量为(22.13±0.48)mg/g菌,锌总含量为(307.61±3.85)mg/L。