黑启动条件下风储系统控制策略研究

风能作为一种可再生能源迅速发展,并且随着储能技术在风力发电中的应用,风储联合发电系统已能够提供持续可靠供电。利用PSCAD仿真软件对风机和储能联合单元模型进行建模仿真。分别对储能电池启动风机,以及风机给储能电池充电的过程进行了仿真,对仿真波形进行分析,验证了控制策略的有效性。     

Impact of graphene oxide nanoparticles and carbon black on the gamma radiation sensitization of acrylonitrile–butadiene rubber seal materials

Seals prepared from acrylonitrile–butadiene rubber (NBR) are primarily used in nuclear services. Nevertheless, at relatively high ionizing radiation doses, NBR seal materials may undergo radiation-induced degradation processes, leading to adverse effects on the sealing ability life. Herein, to strengthen the functional characteristics of NBR seals against radiation, graphene oxide (GO) nanoparticles were prepared and characterized by transmission electron microscopy, X-ray diffraction (XRD), Fourier transform infrared (FTIR), and ultraviolet/visible spectroscopies. Various NBR/GO composites fabricated with different ratios of GO nanoparticles and in the presence or absence of carbon black (CB) were investigated via cross-linking density, scanning electron microscopy, XRD, FTIR, and mechanical and thermal stability analyses. The synergistic effect of the simultaneous presence of GO and CB on the NBR seal sensitization to gamma radiation up to a dose of 1 MGy was studied. The physicomechanical properties were enhanced by adding GO nanosheets up to 3 phr and by incorporating 35 phr of a CB with GO until 5 phr. Further, the application of γ-irradiation resulted in an overall enhancement in the mechanical, physical, and thermal stability of the prepared composites up to 0.5 and 1 MGy with GO nanosheets in the absence or presence of CB particles, respectively. The mechanical measurements indicated significant increments by loading with GO nanosheets in the absence and presence of CB as well as by irradiation. The tensile strength elevated up to about 121%, 336%, and 366% by adding 3 phr GO, 3 GO:35 CB phr, and 5 GO:35 CB phr, respectively.     

碳纤维表面电镀铜

研究了碳纤维表面进行镀铜处理的镀液组分及工艺条件。电镀前先在马弗炉中600～800℃下对碳纤维进行氧化处理。镀液采用水浴加热,温度控制在35～40℃,电流密度为0.5～2.5A·dm-2,最佳pH值为9.0±0.5。采用本实验工艺在碳纤维表面镀铜,效率高,镀层均匀,厚度为1.5～2.0μm,基本上消除了“黑心”现象。     

拜耳法助滤剂研制

拜耳法氧化铝生产中。溶出矿浆经重力分离沉降槽液固分离后。溢流溶液中仍然合有一定的浮游物杂质．在分解之前。需要对溢流进行二次净化，以脱除其中的浮游物。国内拜耳法氧化铝厂目前采用的二次净化方法一般是用凯利叶滤机过滤。受溢流溶液的物理化学性质的影响，叶滤机产能常常会受到溢流溶液过滤速率的限制。铝酸三钙既能加快拜耳法溶液的过滤速率，又能降低滤液的浮游物含量。本文论述了合成铝酸三钙的技术条件对其助滤性能的影响。研究表明，合成温度、钙铝摩尔比、碱浓度会影响助滤剂铝酸三钙的粒度分布、晶体结构及组成，继而影响其助滤性能。控制适宜的合成条件。可以制备出助滤性能优良的铝酸三钙。     

高耐蚀性热镀锌板的钝化处理工艺探讨

介绍了热镀锌板钝化膜的形成机理 ;针对攀钢热镀锌板出现白锈、黑斑等问题 ,分析了钝化液pH值、添加剂及操作条件对钝化膜质量的影响 ,同时提出了改进热镀锌板耐蚀性能的措施     

常压混合脱硅工艺生产种分精液

本文介绍了碳分、种分工艺对精液硅量指数A/S的不同要求,认为种分精液单独生产是很有必要的.本文从理论上分析了目前所应用的脱硅工艺,提出了一种常压生产种分精液的方法-常压混合脱硅工艺,并对某厂采用此工艺进行种分精液生产的情况进行了简单的介绍.     

用碱分解锆英砂制备ZrO2工艺中放射性的分布、处理和回收研究

研究和检测用氢氧化钠分解锆英砂制备ZrO2工艺过程的放射性的走向分布。结果表明，在工业ZrO2的生产工艺中，U和Th主要富集于废酸和ZrOCl2的母液中，也分散于硅渣和水洗液中；两者放射性超标，经转化和处理之后达到排放和堆放要求，并可利用做建筑材料；废酸和母液可以通过TBP萃取分离和回收U和Th，具有工业和经济价值；处理工艺是可行和有效的；废液经沉淀处理之后，沉渣和上清液都达到国家排放和堆放的标准。     

从赤泥盐酸浸出液中提取钪

本文研究了从赤泥的盐酸浸出液中回收钪的工艺条件。以1％P507^＋煤油为有机相。相比O／A=1：1。萃取时间15min。钪的萃取率达90％以上。用6mol/LHCI为洗液。洗涤有机相二次。水洗二次。洗涤相比O／A-3：1。反萃剂为2NNaOH溶液。相比O／A-3：1，反萃温度50℃。最终得到的富集物中Sc2O3的纯度为66．09％。富集了2600倍以上。     

Suboptimal robust synthesis for MIMO plant under coprime factor perturbations

Suboptimal robust synthesis for MIMO nominal system under coprime factor perturbations is considered in classical and non-classical statements. In the classical statement, weights of perturbations and upper bound on magnitude bounded exogenous disturbance are assumed to be known to controller designer. Suboptimal synthesis within ε tolerance is reduced to the solution of log₂(1/ε) standard mixed sensitivity problems of ℓ₁ optimization. In the non-classical statement, the upper bounds on perturbations and exogenous disturbance are to be estimated from measurement data and suboptimal synthesis is reduced to the solution of 1/ε mixed sensitivity problems.     

control with limited communication and message losses

We propose an H^∞ approach to a remote control problem where the communication is constrained due to the use of a shared channel. The controller employs a periodic time sequencing scheme for message transmissions from multiple sensors and to multiple actuators of the system. It further takes into account the information on the random message losses that occur in the channel. An exact characterization for controller synthesis is obtained and is stated in terms of linear matrix inequalities. Furthermore, an analysis on the loss probabilities of the messages to accomplish stabilization is carried out. The results are illustrated through a numerical example.