Engineering Quantum Criticality for Quantum Dot Power Harvesting

Coupling of quantum-dot circuits to microwave photons enables us to investigate photon-assisted quantum transport.Here,we revisit this typical circuit quantum electrodynamical setup by introducing the Kerr nonlinearity of photons.By exploiting quantum critical behavior,we propose a powerful scheme to control the power-harvesting efficiency in the microwave regime,where the driven-dissipative optical system acts as an energy pump.It drives electron transport against a load in the quantum-dot circuit.The energy transfer and,consequently,the harvesting efficiency are enhanced near the critical point.As the critical point moves towards to low input power,high efficiency within experimental parameters is achieved.Our results complement fundamental studies of photon-to-electron conversion at the nanoscale and provide practical guidance for designs of integrated photoelectric devices through quantum criticality.

Tilting homeostatic and dyshomeostatic microglial balance in health and disease:transforming growth factor-beta1 as a critical protagonist

Adult microglia,by continuously sensing changes in their environment and communicating with nearly all brain cell types,are considered to be the immune sentinels of the brain.In the healthy central nervous system(CNS),microglia display a unique molecular homeostatic signature(i.e.,Tmem119,P2ry12,Sall1,Siglech,Gpr34,and Hexb)(Figure 1A).

Unlocking hypoglycemia–associated brain microvascular dysfunction:critical insights from proteomic analysis

Hypoglycemia-a critical complication linked to worsened brain function in diabetic subjects:Hypoglycemia is characterized by a decline in circulatory glucose levels below sta nda rd physiological thresholds.Mild hypoglycemia,classified as level 1 hypoglycemia,is defined by blood glucose levels below 70 mg/dL and can be effectively addressed through carbohydrate intake.Severe hypoglycemia,denoted by blood glucose levels less than 54 mg/dL,poses a life-threatening risk if left untreated.Individuals with type 1 and type 2 diabetes undergoing insulin treatment are particularly susceptible to hypoglycemia due to impaired counterregulatory mechanisms.

Deep eutectic solvents for separation and purification applications in critical metal metallurgy:Recent advances and perspectives

Solvent extraction,a separation and purification technology,is crucial in critical metal metallurgy.Organic solvents commonly used in solvent extraction exhibit disadvantages,such as high volatility,high toxicity,and flammability,causing a spectrum of hazards to human health and environmental safety.Neoteric solvents have been recognized as potential alternatives to these harmful organic solvents.In the past two decades,several neoteric solvents have been proposed,including ionic liquids(ILs)and deep eutectic solvents(DESs).DESs have gradually become the focus of green solvents owing to several advantages,namely,low toxicity,degradability,and low cost.In this critical review,their classification,formation mechanisms,preparation methods,characterization technologies,and special physicochemical properties based on the most recent advancements in research have been systematically described.Subsequently,the major separation and purification applications of DESs in critical metal metallurgy were comprehensively summarized.Finally,future opportunities and challenges of DESs were explored in the current research area.In conclusion,this review provides valuable insights for improving our overall understanding of DESs,and it holds important potential for expanding separation and purification applications in critical metal metallurgy.

基于CRITIC-加权灰色关联分析的年度洪涝灾情评估模型及应用

洪涝灾情评估能够直观呈现洪涝灾害强度和破坏程度,准确评估洪涝灾情是有针对性开展防洪减灾工作的基础。为充分表征洪涝灾害范围及深度,基于洪涝灾害的主要承灾体,从人口受灾、农作物受灾、房屋倒损、水利防洪设施损坏和经济损失5个洪涝灾害主要影响层面筛选洪涝灾情评估指标,分目标层、因子层、指标层构建全国及各地区年度洪涝灾情评估指标体系;基于年度洪涝灾害等级和年度洪涝灾害综合损失程度评估年度洪涝灾情,通过耦合CRITIC权重法和灰色关联分析模型构建CRITIC-加权灰色关联分析模型进行年度洪涝灾害等级评估,采用灾情指数法进行年度洪涝灾害综合损失程度评估;基于ArcGIS直观呈现空间数据的优势,将各地区年度洪涝灾害等级及综合损失程度采用区划图的形式展现。基于以上方法对2006-2021年全国及各地区进行年度洪涝灾情评估,结果表明:在全国年度洪涝灾情评估结果中,2010年为特大洪涝灾害,2013年和2016年为重大洪涝灾害;在各地区年度洪涝灾情评估结果中,湖南省2006年和2017年、河南省2021年年度洪涝灾害等级达到特大洪涝灾害;历年洪涝灾情较重且灾情频次较高的省份依次是四川省、湖南、湖北、江西、广东、海南;基于CRITIC-加权灰色关联分析模型和灾情指数法的年度洪涝灾情评估结果,可作为地区开展防洪减灾工作的依据。

基于CRITIC-TOPSIS模型的长三角地区物流竞争力研究

本文基于CRITIC-TOPSIS模型法,构建由经济实力、物流需求、物流基础设施、人力资源与信息化水平组成的区域物流竞争力评价指标体系及模型,对2015-2021年长三角地区城市群物流竞争力水平进行测度,并介绍长三角地区27个城市物流竞争力水平的时间与空间格局分布特征。结果表明,长三角地区整体物流竞争力水平在近几年保持增长趋势,但与此同时,长三角区域各城市之间物流竞争力水平存在一定区域差异。最后,基于研究结论,提出可以提升长三角地区物流竞争力的合理建议。

基于CRITIC-VIKOR的空域辐射源威胁目标评估

为占据空域主动权和加快战前决策,建立对空域辐射源的威胁评估刻不容缓。为此,提出基于CRITIC-VIKOR的空域辐射源威胁评估方法。首先,地面的侦察组网侦察空域辐射源威胁目标属性集,利用隶属度函数、层次分析法(Analytic Hierarchy Process,AHP)分别得到辐射源威胁目标的客观动态的定量威胁属性和主观定性分析的固有威胁属性。然后,利用指标相关性的权重确定(Criteria Importance Though Intercrieria Correlation,CRITIC)方法分配动态定量分析指标的属性权重,通过加权对主观固有威胁权重与客观态势属性权重进行主客观融合,同时根据决策者的主观偏好调整主客观属性的权重因子。最后,基于多准则妥协决策(VlseKriterijumska Optimizacija I Kompromisno Resenje,VIKOR)方法进行威胁等级排序。仿真实验结果验证了算法的合理性,所提方法能够弥补主观或客观方法单独分析的不足,具有较好的实用性和战场决策参考价值。

CRITIC-G1组合赋权模型在飞行签派员岗位胜任力评估中的应用研究

飞行签派员是航空公司组织飞行活动的主要负责人,完善其岗位胜任力评价体系有利于提高队伍的整体素质.文章采用CRITIC法与G1法组合赋权的评价模型,在飞行签派员“八大胜任力”基础上建立涵盖飞行签派员岗位胜任力的4个一级指标和21个二级指标的岗位胜任力评估模型.通过对样本飞行签派员岗位胜任力的验证,并结合航空公司运行实际,划分飞行签派员胜任力评价标准,提出航空公司飞行签派员评估与管理培训工作的建议,为改进飞行签派员岗位胜任力提供理论参考依据.

基于结构CRITIC法的学术期刊评价指标的赋权方法及比较

在复杂、多元的期刊评价过程中经常涉及各评价指标的赋权问题。不同的评价指标赋权方案直接影响期刊评价的结果,因此如何确定指标权重是一个重要问题。文章基于CRITIC法的赋权原理,结合层次分析法,提出了一种全新的主客观赋权法相结合的权重确定方法,即结构CRITIC法。采用2022年《中国学术期刊影响因子年报(自然科学与工程技术)》中17种数学学术期刊的数据,使用包括原始的CRITIC法在内的其他三种赋权方法进行对比分析。结果表明,主观赋权法和客观赋权法赋权结果的差异性影响了评价结果的公认性;赋权方法的选择应当考虑其适用性;结构CRITIC法是在期刊评价中更能从主观和客观两个方面反映指标权重的计算方法。结构CRITIC法为学术期刊评价提供了一种新的赋权方法。

Prediction calculations for the first criticality of the HTR-PM using the PANGU code

The high-temperature reactor pebble-bed mod-ule(HTR-PM)is a modular high-temperature gas-cooled reactor demonstration power plant.Its first criticality experiment is scheduled for the latter half of 2021.Before performing the first criticality experiment,a prediction calculation was performed using PANGU code.This paper presents the calculation details for predicting the HTR-PM first criticality using PANGU,including the input model and parameters,numerical results,and uncertainty analysis.The accuracy of the PANGU code was demonstrated by comparing it with the high-fidelity Monte Carlo solution,using the same input configurations.It should be noted that k eff can be significantly affected by uncertainties in nuclear data and certain input parameters,making the criticality calculation challenge.Finally,the PANGU is used to pre-dict the critical loading height of the HTR-PM first criti-cality under design conditions,which will be evaluated in the upcoming experiment later this year.

Research on percolation model and criticality of seismicity

Making use of modern nonlinear physics theory and earthquake focus theory, combined with seismicity characteristics, the percolation model of earthquake activity is given in this paper. We take the seismogenic process of alarge earthquake as a phase transition process of percolation and apply the renormalization method to phase transition of percolation. The critical property of the system, which is like percolation probability exponential andcorrelative length exponential, etc, can be calculated under the fixed point as which in the renormalization transformation infinite correlative length in percolation phase transition is taken. The percolation phase transition process of two large earthquakes, which are Haicheng and Tangshan event occurred in 1975 and 1976 respectively, hasbeen discussed by means of seismicity data before and after two shocks.

End-to-end Delay Analysis for Mixed-criticality WirelessHART Networks

WirelessHART, as a robust and reliable wireless protocol, has been widely-used in industrial wireless sensoractuator networks. Its real-time performance has been extensively studied, but limited to the single criticality case. Many advanced applications have mixed-criticality communications, where different data flows come with different levels of importance or criticality. Hence, in this paper, we study the real-time mixedcriticality communication using WirelessHART protocol, and propose an end-to-end delay analysis approach based on fixed priority scheduling. To the best of our knowledge, this is the first work that introduces the concept of mixed-criticality into wireless sensor-actuator networks. Evaluation results show the effectiveness and efficacy of our approach. © 2014 Chinese Association of Automation.

基于改进CRITIC-熵权法组合赋权模型的西藏高原河湖健康评价

河湖健康评价对于保障水资源安全、促进可持续发展具有重要意义。采用改进CRITIC-熵权法组合赋权模型,计算了高原河湖健康评价体系的指标权重,并对尼洋河和扎日南木错进行了评价。评价结果显示,尼洋河的健康等级为“健康”,准则层权重大小依次为社会服务功能、“盆”、“水”、生物;扎日南木错的健康等级为“非常健康”,准则层权重排序为“水”、“盆”、生物、社会服务功能;评价结果表明,尼洋河的河岸带植被宽度、岸线稳定性较低,扎日南木错则在岸线自然状况、大型底栖动物生物完整性和湖泊营养状态等方面仍需改进;最后,河湖对尼洋河和扎日南木错的保护和管理提出若干建议。

基于CRITIC-TOPSIS的中国区域碳减排能力评价及空间分析

气候变化是全人类的共同挑战,中国在气候治理行动中,期望在最短时间内完成碳排放强度全球最大降幅。实现碳达峰碳中和,需统筹处理好整体和局部的关系,有效评价区域碳减排能力。基于CRITIC-TOPSIS法对2015—2019年中国区域碳减排能力进行测度评价,结合GIS技术对碳减排能力空间特征开展分析。结果表明:指标权重随社会变化不断发生动态变化;碳减排能力区域差异显著,呈现明显的东部高,中西部低的现象;区域碳减排能力发展水平空间自相关性显著,其中高值聚类显著性更强,空间分布出现“俱乐部趋同”现象。最后,对目前区域碳减排能力存在的问题提出了相应的对策建议。

P-V Criticality of an AdS Black Hole in f(R)Gravity

We study the thermodynamics of a charged AdS black hole in the special f(R)correction with the constant Ricci scalar curvature.Our results show that the f(R)correction influences the Gibbs free energy and the phase transition of system.The ratioρc occurring at the critical point increases monotonically with the derivative term f'(R0).We also disclose that the critical exponents are the same as those of the liquid-gas phase transition in the van der Waals model,which does not depend on the f(R)correction considered here.

Performance of the CENDL-3.2 and other major neutron data libraries for criticality calculations

Nuclear data are the cornerstones of reactor physics and shielding calculations.Recently,China released CENDL-3.2 in 2020,and the US released ENDF/B-VIII.0 in 2018.Therefore,it is necessary to comprehensively evaluate the criticality computing performance of these newly released evaluated nuclear libraries.In this study,we used the NJOY2016 code to generate ACE format libraries based on the latest neutron data libraries(including CENDL-3.2,JEFF3.3,ENDF/B-VIII.0,and JENDL4.0).The MCNP code was used to conduct a detailed analysis of fission nuclides,including^(235)U,^(233)U,and^(239)Pu,in different evaluated nuclear data libraries based on 100 benchmarks.The criticality calculation performance of each library was evaluated using three statistical parameters:δk/σ,χ^(2),and<|Δ|>.Analysis of theδk/σparameter showed that CENDL-3.1 and JENDL-4.0 both had>10 benchmarks that exceeded 3r,whereas CENDL3.2,ENDFB-VIII.0,and JEFF-3.3 had,7,5,and 4 benchmarks,respectively,exceeding 3r.The ENDF/B-VII.1 library performed best,with only two benchmarks exceeding 3r.Compared to CENDL-3.1,CENDL-3.2 offers an improvement in criticality calculations.Compared to the JEFF-3.3 and ENDF/B-VIII.0 libraries,CENDL3.2 performs better in the calculation of the^(233)U assemblies,but it performs poorly in the pusl11 series case calculation of the^(239)Pu assemblies,and thus further improvement is needed.

Self-Organized Criticality Analysis of Earthquake Model Based on Heterogeneous Networks

The original Olami-Feder-Christensen （OFC） model, which displays a robust power-law behavior, is a quasistatic two-dimensional version of the Burridge-Knopoff spring-block model of earthquakes. In this paper, we introduce a modified OFC model based on heterogeneous network, improving the redistribution rule of the original model. It can be seen as a generalization of the originM OFC model We numerically investigate the influence of the parameters θandβ, which respectively control the intensity of the evolutive mechanism of the topological growth and the inner selection dynamics in our networks, and find that there are two distinct phases in the parameter space （θ,β）. Meanwhile, we study the influence of the control parameter a either. Increasing a, the earthquake behavior of the model transfers from local to global.

A Modified Earthquake Model of Self-Organized Criticality on Small World Networks

A modified Olami Feder-Christensen model of self-organized criticality on a square lattice with the properties of small world networks has been studied.We find that our model displays power-law behavior and the exponent τ of the model depends on φ,the density of long-range connections in our network.

Self-organized Criticality Model for Ocean Internal Waves

In this paper, we present a simple spring-block model for ocean internal waves based on the self-organized criticality （SOC）. The oscillations of the water blocks in the model display power-law behavior with an exponent of -2 in the frequency domain, which is similar to the current and sea water temperature spectra in the actual ocean and the universal Garrett and Munk deep ocean internal wave model [Geophysical Fluid Dynamics 2 （1972） 225; J. Geophys. Res. 80 （1975） 291]. The influence of the ratio of the driving force to the spring coefficient to SOC behaviors in the model is also discussed.

基于CRITIC和AHP组合赋权的TOPSIS法蜂群威胁评估研究

蜂群威胁评估是现代防空作战中不可缺少的环节,其评估思路的合理性和评估结果的可信度会直接影响对来袭蜂群拦截的成功与否。在考虑了无人机战术参数、战场实时动态和战场环境条件等因素后建立了动态指标和静态指标结合的蜂群威胁评估体系,运用CRITIC法和层次分析法分别确定威胁评估体系中的客观权重和主观权重,并用博弈思想对两种权重组合得出优化权重,最后使用优劣解距离法对来袭蜂群进行了威胁评估分析,得出袭蜂群的威胁评估排序结果。仿真结果表明该方法所得的蜂群威胁评估结果排序能有效提高作战效能,证明该方法的合理性和优越性。