RB功能探讨

介绍RB(RUNBACK)的控制特点、系统组成及控制逻辑等,分析其动态过程。     

超临界机组送、引风机RUNBACK试验过程及分析

介绍了超临界机组送、引风机RUNBACK的主要动作要求,详细描述了2次送、引风机RUNBACK试验过程及RUNBACK过程中遇到的问题和解决方法,最后给出了一次成功的送、引风机RUNBACK试验结果,并对其结果进行了深入分析。     

600MW机组变频调速风机RB功能应用

某厂一台600MW机组引风机和一次风机变频改造后,变频引风机RB性能试验获得成功,变频一次风机RB性能试验引起锅炉MFT动作而失败。机组RB功能的正确投运对发电机组和电网的安全运行具有重要意义。就该机组变频风机RB功能的应用情况进行介绍,对变频一次风机RB性能试验失败原因进行分析,提出实现变频一次风机RB功能的改进意见。     

“两引一送”机组引风机RB控制研究

采用两台引风机、一台送风机、一台空预器配置的火力发电机组简称"两引一送"单辅机配置。与常规配置机组相比,采用"两引一送"配置的超超临界机组,在引风机辅机故障减荷(RB)动作过程中存在炉膛负压波动大、水煤比及风煤比容易失衡等问题。为解决上述问题,对RB控制策略进行研究。在常规超超临界机组RB控制策略的基础上,通过采用前馈控制、超驰控制、比例积分微分(PID)变参数设计及滑压曲线优化等多种优化方法,最终实现"两引一送"这种特殊配置机组在引风机RB动作时的精确控制。引风机RB动态试验结果表明,RB动作过程中炉膛负压、中间点温度等机组主要参数均可以控制在合理范围内。优化方案有效提高了RB功能的实用性和可靠性,为其他同类型机组的RB功能实施提供了一定的借鉴。     

500MW火力发电机驵协调控制系统RB逻辑优化研究

结合同华系统内电厂发生RB后出现的问题，以及锦界电厂机组的自身特点，对国华锦界电厂600MW发电机组CCS中RB功能在运行过程中存在的问题进行了详细的分析，提出了改进、优化方案及措施，对结果进行了全面的论证和总结，诈对投运效果进行了综合评价。     

一种新型RB控制技术在1000MW超超临界火电机组的应用

以广东某1000MW超超临界火电机组为例,针对超超临界机组增压风机故障减负荷(RunBack,RB)功能的稳定投运对提高机组运行安全、稳定性的重要作用,研究和分析超超临界机组增压风机RB的控制策略、具体优化措施和现场试验情况,对同类型机组增压风机RB试验的实施提供参考依据.     

1000MW机组脱硫系统增压风机跳闸RB控制技术

1000MW超超临界机组取消脱硫烟气旁路后,增压风机跳闸会危及机组安全运行.针对以上问题,采用快速减负荷的方法,可以提高机组安全.提出当增压风机跳闸触发RB时,送风机、引风机预置一定开度的控制策略,解决了增压风机跳闸后引发引风机失速的问题,成功实现了增压风机RB功能.试验结果表明,所提出的控制策略切实可行,对同类型机组实施增压风机RB试验具有重要的参考意义.     

RB传输效率在LTE网络评估中的应用研究

首先详细介绍了RB传输效率的原理;然后分析了影响RB传输效率的因素,展示了RB传输效率的应用效果;最后给出研究结论,论述了应用RB传输效率进行TD-LTE网络性能评估的科学性及可行性.     

基于Bernstein函数类的Bezier曲面类

为了进一步丰富Bezier曲面理论,以及克服原有Bezier曲面理论中的一些不足,在梁锡坤提出的Bernstein函数类的基础上,对基于该类函数的Bezier曲面类的生成方法进行了研究。并给出了两种具体的Bezier曲面类曲面,这两种曲面是基于有理形式调配函数,即RB函数的实用曲面,称之为RB曲面和附权RB曲面。重点研究了RB曲面和附权RB曲面的表示方法和有关性质,同时还分析了这两种曲面之间以及与Bezier曲面之间的关系。得到了较好的结果,使Bezier曲面理论更加完善。     

基于Bernstein函数类的Bezier曲面类栽

为了进一步丰富Bezier曲面理论,以及克服原有Bezier曲面理论中的一些不足,在梁锡坤提出的Bernstein函数类的基础上,对基于该类函数的Bezier曲面类的生成方法进行了研究.并给出了两种具体的Bezier曲面类曲面,这两种曲面是基于有理形式调配函数,即RB函数的实用曲面,称之为RB曲面和附权RB曲面.重点研究了RB曲面和附权RB曲面的表示方法和有关性质,同时还分析了这两种曲面之间以及与Bezier曲面之间的关系.得到了较好的结果,使Bezier曲面理论更加完善.     

Analysis of a rule-based control strategy for on-board energy management of series hybrid vehicles

In the paper, the performances of a rule-based (RB) control strategy for series hybrid vehicles are assessed via comparison with a batch Genetic Algorithm-based (GA) optimization. The suitability of GA optimization as reference benchmark for series architecture is demonstrated through comparison with Dynamic Programming technique. Specifically in this paper, a hybrid solar vehicle (HSV) was considered, thus requiring to define the heuristic rules as function of both average traction power and current solar irradiation. The comparison with the reference GA benchmark confirms the suitability of the proposed RB strategy for HSV on-board energy management. Extensive simulations were performed to test the influence of driving cycle features, power-prediction time-horizon and solar irradiation on HSV fuel economy. Such simulation analysis, beyond providing useful indications about correct implementation of the RB strategy on both hybrid and solar hybrid cars, also demonstrates the potentialities offered by HSV powertrains in both urban and highway driving conditions.     

一类有理曲线—RB曲线

为了进一步丰富 Bézier曲线理论 ,首先从 Bernstein基函数出发 ,构造了一类新型函数—— Bernstein函数类 ,同时讨论了它的性质 ;然后用该类函数给出了 Bézier曲线类的生成方法 ;重点研究了一类基于有理形式调配函数的实用曲线—— RB曲线 ,结果表明 ,附加权因子的 RB曲线能部分克服常用的有理 Bézier曲线的权因子的选取没有统一的规则可以遵循的局限 ,提高了曲线设计的灵活性 ;最后给出了实例 ,并得到了可视化结果 .     

抽汽供热机组RB控制逻辑优化研究

辅机故障减负荷(RB)控制在机组发生部分主要辅机故障跳闸时,可将机组负荷快速降到当前辅机实际所能达到的相应出力,并调节机组参数至允许范围内,以保障机组持续运行、避免非停事故发生。然而,大量纯凝机组在完成供热或工业供汽改造后,并没有对其RB控制逻辑进行相应修改,导致主要辅机故障时,机组实际负荷仍然低于当前辅机所能达到的相应出力。这进而会导致RB控制拒动,增加了机组非停风险。为了解决上述问题,在分析供汽改造后RB控制逻辑无法触发的原因基础上,首次提出了有效的机组发电负荷实时预测方法。通过采用预测负荷取代机组当前实际负荷,修正了RB控制逻辑触发的判定条件,确保RB控制能够及时正确触发。该方法具有适用广泛、抗干扰性强等优点。     

Comparison of initial partitioning methods for multilevel direct k-way graph partitioning with fixed vertices

In scientific computing, load balancing is a crucial step conditioning the performance of large-scale applications. In this case, an efficient decomposition of the workload to a number of processors is highly necessary. A common approach to solve this problem is to use graph representation and perform a graph partitioning in k-parts using the multilevel framework and the recursive bisection (RB) paradigm. However, in graph instances where fixed vertices are used to model additional constraints, RB often produces partitions of poor quality.In this paper, we investigate the difficulties of RB to handle fixed vertices and we compare its results with two different alternatives. The first one, called kgggp is a direct k-way greedy graph growing partitioning that properly handles fixed vertices while the second one, introduced in kPaToH, uses RB and a post-processing technique to correct the obtained partition. Finally, experimental results on graphs that represent real-life numerical simulations show that both alternative methods provide improved partitions compared to RB.     

国华锦能公司RB逻辑设计与优化

本文通过对神华陕西国华锦界能源有限责任公司(以下简称国华锦能公司)4×600MW机组RB控制逻辑设计及现场实际应用情况分析,提出了优化RB控制逻辑的具体方法,并通过现场应用消除了原设计当中存在的安全隐患,对同类厂的RB控制逻辑设计有借鉴意义。     

Membrane Proteome of Invasive Retinoblastoma: Differential Proteins and Biomarkers

Purpose: Retinoblastoma (RB) is a pediatric ocular cancer which is caused due to the aberrations in the RB1 gene. The changes in the membrane proteomics would help in understanding the development of the retinoblastoma and could identify candidates for biomarkers and therapy. Experimental design: Quantitative proteomics is performed on the enriched membrane fractions from pooled normal retina (n = 5) and pooled retinoblastoma tissues (n = 5). The proteins are tryptic‐digested and tagged with iTRAQ labels. Orbitrap mass spectrometry is used to analyze and quantify the deregulated membrane proteins involved in the RB tumor progression. Immunohistochemistry (IHC) is used to further validate few of the differentially expressed proteins. Results: A total of 3122 proteins are identified of which, 663 proteins are found to be deregulated with ≥two fold change in the RB tumor compared to the retina. 282 proteins are upregulated and 381 are downregulated with ≥2 peptide identifications. Bioinformatic analysis revealed that, most of the proteins are involved in the transport, cellular communication, and growth. Overexpression of lamin B1 (LMNB1) and transferrin receptor (TFRC) are observed in RB tumors using IHC. Conclusion and clinical relevance: The present study, is the first comprehensive quantitative membrane proteomic atlas of the differentially regulated proteins in RB compared to the retina. LMNB1 and TFRC could be potential biomarkers for this childhood cancer.