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Real-world traffic analysis and joint caching and scheduling for in-RAN caching networks

Science China(Information Sciences) 2017年第6期60卷 176-190页

作者： Zejue WANG hongjia li Zhen XU State Key Laboratory of Information Security Institute of Information EngineeringChinese Academy of Sciences

This paper analyzes the traffic of a current LTE network in China and investigates the joint optimization of content object caching and scheduling for in-radio access network(RAN) caches. Cooperative caching has been well recognized as a way of unleashing the ultimate potential of in-RAN caches, yet its feasibility is still unexplored. Moreover, content object caching and scheduling are two key issues for cache deployment,which are usually jointly considered and resolved. However, they are triggered by different events with different time granularities. Therefore, on the basis of the real-world dataset, the feasibility of in-RAN cooperative caching is proved from aspects of network topology, traffic load difference among small base stations(SBSs)and correlation analysis of content objects requested at different SBSs. Then, it is verified that different time scales should be considered in making content object caching and scheduling decisions. To exploit in-RAN cooperative caching while meeting the time scale requirement in making caching and scheduling decisions, an optimization problem is constructed considering practical transmission constraints in wireless and backhaul. It is proved to be a quadratic assignment problem, and then, a joint caching, and wireless and backhaul scheduling algorithm is proposed based on Lagrangian relaxation and decomposition, and hastening branch and *** performance of the proposed algorithm is evaluated based on the real-world dataset. Results depict the relationship among the cache capacity, the number of SBSs, the connection probability of SBSs and the objective performance, and show that the proposed algorithm can achieve better performance, compared with the existing algorithms.

关键词： 5G mobile edge caching mobile traffic analysis optimization cooperative caching

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Fatigue Damage Mechanism of AL6XN Austenitic Stainless Steel at High Temperatures

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Acta Metallurgica Sinica(English Letters) 2020年第6期33卷 799-807页

作者： Yanyan Hong Penglin Gao hongjia li Changsheng Zhang Guangai Sun Key Laboratory of Neutron Physics Institute of Nuclear Physics and ChemistryCAEPMianyang 621900China Key Laboratory for Anisotropy and Texture of Materials School of Materials Science and EngineeringNortheastern UniversityShenyang 110004China

By the combination of transmission electron microscope, neutron diffraction and small-angle neutron scattering methods, mechanical fatigue behavior of AL6XN austenitic stainless steel was investigated in the temperature range of 400–600 °C. At 400 °C, in addition to the occurrence of dynamic strain aging, the formation of short-range order was evidenced from the forbidden electron diffraction spot of 1/3 {422} in face-centered cubic(fcc) structure viewed down [111] zone axis, which facilitate the planar slip mode of dislocation and result in the work hardening during the fatigue deformation. The fatigue damage is mainly dominated by the accumulation of planar slip band and the interaction among various slip systems. With increasing temperature, precipitates of chi phase, Laves phase and sigma phase were formed during the fatigue tests at 500 and 600 °C. An increase in precipitation content at 600 °C has also been confirmed by both scanning electron microscope and small-angle neutron scattering analysis. The dislocation pileup originating from the uncoordinated deformation between precipitate and austenitic matrix is an important fatigue damage leading to crack. The continuous cycle softening behavior was also observed on the fatigue curve at 600 °C, which is considered to be caused by dynamic recovery.

关键词： Precipitates Low-cycle fatigue Austenitic stainless steel Small-angle neutron scattering Planar slip bands

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Cross-layer transmission and energy scheduling under full-duplex energy harvesting wireless OFDM joint transmission

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Science China(Information Sciences) 2016年第10期59卷 136-151页

作者： hongjia li Zejue WANG Dan HU Song CI Zhen XU State Key Lab of Information Security Institute of Information EngineeringChinese Academy of Sciences Cisco System Incorporated Department of Computer and Electronics Engineering University of Nebraska-Lincoln

This paper studies the design of the optimal and online cross-layer transmission and energy schedulings for a full-duplex energy harvesting wireless orthogonal frequency division multiplexing(OFDM) joint transmissions. Supported by today’s power management integrated circuit, the full-duplex energy harvesting system becomes a reality, which can overcome the transmission time loss problem caused by the half-duplex constraint of the energy storage unit(ESU) in the serial Harvest-Store-Use system. However, its corresponding modeling is still unexplored. Therefore, the full-duplex energy harvesting system is first modeled and proved to be equivalent to a composition of energy behavior models of Harvest-Store-Use in fine-time granularity. Then, the convex optimization problem of cross-layer transmission and energy scheduling is formulated with the objective to maximize the sum of transmission throughput during successively multiple time units, which takes into account the temporal variance of energy harvesting rates and channel states, and the limited capacity of *** optimal power allocation with three dimensions of time, channel and antenna is solved by utilizing the dual decomposition method with the pre-known temporal variance, and the corresponding result of the system throughput provides the theoretical upper bound. Finally, to reduce the throughput degradation caused by channel state prediction errors, a non-convex online scheduling problem is formulated as the classical energy efficiency format. It is transformed into a convex optimization problem by exploiting the properties of fractional programming, and then, an efficiently iterative solution is designed. Numerical results show that the average throughput of the online algorithm is 24% greater than that of existing time-energy adaptive water-filling algorithm. The degradation of the average throughput is less than 19% with probability 90%, even as the channel prediction error reaches 20%. These results pro

关键词： energy harvesting wireless communication power allocation joint transmission optimization green communication

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Overexpression of glucosylceramide synthase and its significance in the clinical outcome of non-small cell lung cancer

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Chinese Medical Journal 2014年第17期127卷 3071-3076页

作者： Zhang Caiqing lin Xiaoyan Song Yinghua Zhang Xiaofang li hongjia Wang Qiangxiu Department of Respiratory Medicine Shandong Provincial Qianfoshan Hospital Shandong University Jinan Shandong 250014 China Department of Pathology Shandong Provincial Hospital Affiliated to Shandong University Jinan Shandong 250021 China Department of Pathology School of Medicine Shandong University Jinan Shandong 250012 China

Background Glucosylceramide synthase （GCS）,an enzyme responsible for ceramide glycosylation,plays an important role in multidrug resistance （MDR） in some tumors in vitro; however,its expression and clinicopathological significance in non-small cell lung cancer （NSCLC） remains *** We evaluated GCS expression in 116 paired tumor and adjacent non-cancerous tissues and 50 frozen tissues from patients with NSCLC using immunohistochemistry and western blotting,and explored the correlation between GCS and NSCLC clinicopathological characteristics and *** observed the association between GCS and the MDR proteins P-glycoprotein （P-gp） and lung resistance-related protein （LRP） to determine the link between GCS and MDR at the histological *** GCS expression was significantly upregulated in NSCLC tumors compared with non-cancerous *** was high GCS expression in 75/116 tumor specimens （64.7％） and 16/116 non-cancerous specimens （13.8％）.High GCS expression was significantly associated with poor differentiation （P=0.01）,lymph node metastasis （P=0.004）,recurrence/ distant metastasis （P=0.006）,and chemotherapy resistance （P=0.025）.Multivariate analysis demonstrated that GCS immunopositivity was an independent risk factor for survival （P=0.018）.P-gp was expressed in 80/116 tumors （69.0％） and in 12/116 non-cancerous tissue specimens （10.3％; P=0.001）; LRP was expressed in 85/116 tumors （73.3％） and 19/116 non-cancerous tissue specimens （16.4％; P=0.001）.Importantly,the results demonstrated that increased GCS expression in NSCLC cancer specimens correlated with increased expression of P-gp and LRP,molecules known to stimulate cancer cell MDR （r=0.612 and 0.503,P=0.01 and 0.035,respectively）.Conclusion GCS upregulation might contribute to the development of NSCLC and could be a useful prognostic indicator and chemoresistance predictor for NSCLC patients.

关键词： glucosylceramide synthase non-small cell lung cancer multidrug resistance P-glycoprotein lung resistant-related protein

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公共服务购买中的政府责任及实现机制——以担保国家理论为视角

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云南行政学院学报 2020年第1期22卷 146-152页

作者：李洪佳天津外国语大学

政府购买公共服务并不是政府推卸责任的借口。但政府履行性职能的外包使得行政任务履行的主体和行为方式发生了变迁。这势必会动摇传统的公法规制下的政府责任及其履行方式。因此需要建构新的适用于购买公共服务的政府责任框架。担保国... 详细信息

政府购买公共服务并不是政府推卸责任的借口。但政府履行性职能的外包使得行政任务履行的主体和行为方式发生了变迁。这势必会动摇传统的公法规制下的政府责任及其履行方式。因此需要建构新的适用于购买公共服务的政府责任框架。担保国家理论为公共服务购买中新的政府责任框架的构建提供了新的理论视角。基于担保国家理论,在购买公共服务中政府虽然不再负有直接供给公共服务的责任,但基于民主正当性和基本权利保障的原则,政府应承担担保责任。具体表现为:组织责任、监管责任和接管责任。这些责任的履行需要政府通过法制、规制、互动和评估等四个机制来实现。

关键词：担保国家理论政府购买公共服务政府责任

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PIXER2: an automated particle-selection method based on image segmentation algorithm with multi-scale fusion

PIXER2: an automated particle-selection method based on imag...

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第七届全国冷冻电子显微学与结构生物学专题研讨会

作者： hongjia li Zenan Shen 张驰 Fa Zhang Xiaohua Wan High Performance Computer Research Center Institute of Computing Technology Chinese Academy of Sciences University of Chinese Academy of Sciences State Key Laboratory of CAD & CG Zhejiang University

＜正＞Cryo-electron microscopy （cryo-EM） is an increasingly popular method for protein structure ***,to acquire the input for single-particle cryo-EM reconstruction,researchers must identify a sufficient number of from micrographs （often ＞100000）.As the signal-to-noise ratio （SNR） of micrographs is extremely low,the performance of automated particle-selection methods is still unable to meet research *** free researchers from this laborious work and to acquire a large number of high-quality particles,we propose an automated particle-selection method （PIXER2） based on the image segmentation algorithm with multi-scale fusion.

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新时代的政府购买公共文化服务:价值逻辑、能力要求、提升路径

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图书馆 2022年第5期 38-42页

作者：李洪佳天津外国语大学天津300204

新时代社会主要矛盾的转变要求政府在购买公共文化服务的过程中除了遵循传统的“效率”这一价值逻辑外,还要遵循公民本位、责任行政和法治等价值逻辑。新的价值逻辑需要多方面的政府能力予以保障,具体包括科学决策能力、依法购买能力、... 详细信息

新时代社会主要矛盾的转变要求政府在购买公共文化服务的过程中除了遵循传统的“效率”这一价值逻辑外,还要遵循公民本位、责任行政和法治等价值逻辑。新的价值逻辑需要多方面的政府能力予以保障,具体包括科学决策能力、依法购买能力、监督评估能力和紧急承接的能力。这些能力的提升需要政府构建多元开放的需求表达机制和决策参与机制、完善相关的法律法规、建立协同监督机制及健全政府的规制机制。

关键词：新时代公共行政价值公共文化服务政府购买政府能力

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气道支架在声门下狭窄的临床应用与进展

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中华结核和呼吸杂志 2022年第11期45卷 1140-1146页

作者：邢悦年李红佳钟长镐李时悦广州医科大学附属第一医院呼吸与危重症医学科广州呼吸健康研究院呼吸疾病国家重点实验室国家呼吸系统疾病临床研究中心广州510120

喉气管狭窄,是由各种原因造成的喉气管软骨支架畸形、塌陷或缺损,喉气管黏膜瘢痕形成或黏膜下组织增生导致呼吸困难的疾病。声门下狭窄特指声门下至环状软骨下缘的气道狭窄,是喉气管狭窄中的一种特殊类型,最常见病因为医源性损伤,如长... 详细信息

喉气管狭窄,是由各种原因造成的喉气管软骨支架畸形、塌陷或缺损,喉气管黏膜瘢痕形成或黏膜下组织增生导致呼吸困难的疾病。声门下狭窄特指声门下至环状软骨下缘的气道狭窄,是喉气管狭窄中的一种特殊类型,最常见病因为医源性损伤,如长时间气管插管及气管切开。现主要治疗方式有外科手术治疗、气管造口术、内镜引导下支架置入以及药物治疗。对于已有呼吸困难且不宜进行手术或者急需术前过渡处理的患者,呼吸内镜引导下的支架置入成为重要的治疗方式。本文对PubMed、CBM、知网、万方、维普等数据库中检索获得的1994年以来有关声门下狭窄支架置入的51篇文献进行回顾,重点比较金属支架、沙漏形、直筒形DUMON支架及Montgomery T形管的疗效,并发症及预后,探讨内镜引导下支架置入在声门下狭窄的临床应用。文献研究表明,相较于DUMON硅酮支架和金属支架,T形管有着更显著的优势、更高的治疗成功率以及更低的并发症率。因此认为Montgomery T形管更适用于声门下狭窄患者的长期治疗。随着人类科技的不断进步,新工艺新材质的不断完善和更新,新型气道支架的蓬勃发展也为声门下狭窄患者提供了全新的组织相容性更好、并发症更少、可个体化定制的支架治疗模式。

关键词：声门下狭窄医源性损伤气管切开气管造口术组织增生金属支架喉气管呼吸困难

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台湾产业结构变动与经济增长关系实证分析

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世界经济与政治论坛 2009年第3期 105-110页

作者：袁建文李红佳广东商学院经贸与统计学院统计系主任广东商学院经贸与统计学院统计专业研究生 510240

第一、二产业比重的不断下降和第三产业比重的大幅上升构成了1981年以来台湾地区产业结构演变的主要趋势。运用协整理论和误差修正模型对台湾地区1981—2007年经济增长与产业结构间的关系进行实证研究,结果表明,两者之间呈现长期稳定的... 详细信息

第一、二产业比重的不断下降和第三产业比重的大幅上升构成了1981年以来台湾地区产业结构演变的主要趋势。运用协整理论和误差修正模型对台湾地区1981—2007年经济增长与产业结构间的关系进行实证研究,结果表明,两者之间呈现长期稳定的协同互动关系,第三产业对经济增长的拉动作用尤其明显。

关键词：产业结构经济增长协整检验格兰杰因果检验台湾

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重视可弯曲支气管镜技术在气道异物中的应用

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中华结核和呼吸杂志 2023年第5期46卷 530-533页

作者：钟长镐李红佳李时悦广州医科大学附属第一医院呼吸与危重症医学科、国家呼吸医学中心、国家呼吸系统疾病临床医学研究中心、呼吸疾病国家重点实验室、广州呼吸健康研究院广州510120

气道异物是指由于不慎导致异物吸入喉、气管或支气管内导致气道堵塞,引起剧烈咳嗽、喘鸣、呼吸困难、甚至窒息死亡,是呼吸与危重症医学科、急诊科、耳鼻咽喉科、儿科等临床科室常见的急危重症之一。随着可弯曲支气管镜技术的推广,经呼... 详细信息

气道异物是指由于不慎导致异物吸入喉、气管或支气管内导致气道堵塞,引起剧烈咳嗽、喘鸣、呼吸困难、甚至窒息死亡,是呼吸与危重症医学科、急诊科、耳鼻咽喉科、儿科等临床科室常见的急危重症之一。随着可弯曲支气管镜技术的推广,经呼吸内镜异物取出治疗已经在成人及儿童中广泛应用,通过联合不同的器械如鳄齿钳、网篮、球囊、冷冻探针等可安全、高效移除异物,本文将简述气道异物的治疗方式,总结归纳经可弯曲支气管镜治疗气道异物的有效途径。

关键词：气道异物耳鼻咽喉科剧烈咳嗽支气管内临床科室气道堵塞异物吸入急诊科

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