Priority-Based Routing Resource Assignment Considering Crosstalk

Crosstalk has become one of the most critical concerns in very deep sub-micron era. This paper deals with the problem of crosstalk mitigation at both methodological and algorithmic levels. Noting that intermediate operations between global routing and detailed routing are very effective in crosstalk estimation and reduction, the authors propose to incorporate several intermediate steps that are separated in traditional design flow into an integrated routing resource assignment stage, so that the operations could easily cooperate to fully exert their power on crosstalk reduction. An efficient priority-based heuristic algorithm is developed, which works slice by slice. Crosstalk avoidance, and many other aspects that are critical in routing practice including congestion, vias, layer preference, etc., are taken into account. A track reservation strategy is adopted in the algorithm framework to compensate the undesired effects caused by sequential routing. Experimental results on a series of ISPD98 and industrial benchmarks show that the proposed approach is able to reduce capacitive crosstalk by about 70% on average without compromising completion ratio compared with a previously reported graph based algorithm, demonstrating the advantages of the approach.     

Preparation and Application of Biomass-based Sprayable Hydrogels

Hydrogels have three-dimensional network structures that have been widely applied owing to their high water content, excellent biocompatibility, and physicochemical properties. Compared with conventional hydrogels, sprayable hydrogels exhibit excellent temporal and spatial controllability. Biomass materials offer easy accessibility, biocompatibility, biodegradability, and other physicochemical properties that are extensively used in the formation of sprayable hydrogels. In situ formed biomass-ba...     

High Performance of Paper Strength and Energy Savings in OCC Pulp Papermaking via MFC Addition

Fiber screen fractionation of recycled old corrugated container(OCC) pulp and subsequent targeted processing of each fraction can lead to higher fiber quality, more uniform pulp, and increased handsheet strength and surface smoothness. This pilot-scale study evaluates the benefits of fiber fractionation using a pressure screen prior to low consistency(LC) refining. A 0.81-mm smooth holed screen cylinder is utilized, and two refiner plate patterns are adopted(wide 0.99 km/rev BEL and interim 2.01...     

航天运输系统及再入飞行器中的高超声速技术

概要介绍了50年来中国航天运输和再入飞行器的发展及其对高超声速技术的发展的带动,探讨了高超声速技术的发展方向及其对航天运输及再入飞行器的促进与影响.     

大冶铁矿同阶段崩落法转充填法开采隔离间柱合理宽度确定

为保障同阶段崩落法转充填法开采顺利过渡,过渡段处须设置竖向隔离间柱。以大冶铁矿龙洞采区-170 m同阶段崩落法转充填法梯形隔离间柱为研究对象,将其简化为变惯性矩固支梁,并以间柱的水平应 变量允许值为判据,初步确定梯形隔离间柱上端的初始宽度。以梯形隔离间柱上端的初始宽度为基础,采用数值模拟方法,计算了不同梯形隔离间柱上端宽度与不同充填体灰砂比协同作用下的充填采场顶板围岩沉降 量,并对不同灰砂比下梯形隔离间柱上端宽度与顶板围岩最大沉降量进行了数据拟合,由顶板围岩允许沉降值得到与不同充填体灰砂比协同匹配下的梯形隔离间柱上端的合理宽度。数值计算结果表明：与充填体灰砂 比分别为1∶4、1∶6、1∶8、1∶10、1∶12协同匹配的梯形隔离间柱上端合理宽度分别为16、19、21、25、29 m。研究成果可为合理确定矿山同阶段崩落法转充填法开采过渡段隔离间柱宽度提供参考。     

可视化远程控制（无人）转载系统的研究

针对井下巷道内快速机械化进行采掘物料转载、装料等操作困难的问题,分析了实际工况的要求,设计了一种采用带可视化系统、能够远程操控、现场无人值守工作方式、液压为驱动力的井下巷道转载系统。经过现场验证,该系统解决了大方量物料在井下巷道内转载、装料的问题,从而节约传统的人工岗位,提高了工作效率,增强了工作中的可靠安全性。     

鄂东南地区尾矿资源综合利用前景及开发建议思路浅析

鄂东南地区尾矿资源丰富,以往尝试过尾矿资源的利用,均未按综合利用的思路开展,导致尾矿的经济价值未充分体现,制约了尾矿资源的开发利用。通过对鄂东南尾矿资源现状分析,结合目前选冶加工技术和国家相关管理政策,提出"资源—环境—灾害"三位一体的综合利用框架和"全面摸底—资源勘查—市场调研—工艺确定—市场销售"链条化的开发利用思路,从摸清家底、市场调研、价值评估、合作开发四个方面分层次统筹推进尾矿资源的综合开发,对合理推进鄂东南地区尾矿资源的综合利用有较好的指导和借鉴意义。     

福清核电厂基于堆外核仪表系统中间量程测量的动态刻棒试验

通过分析堆外核仪表系统的功率量程和中间量程的性能,使用堆外核仪表中间量程的测量信号进行动态刻棒试验数据验证。验证结果表明,基于堆外核仪表系统中间量程的动态刻棒试验可作为传统动态刻棒试验的一种手段,其测量误差在验收准则允许范围内,且无需进行本底电流测量即可减少动态刻棒测量时间。