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Provenance of the Lower Jurassic pyroclastic sediments in the Zigui Basin:Implication for crustal thickening in the eastern Qinling orogenic belt

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Science China Earth Sciences 2024年第1期67卷 196-207页

作者： rong chai Jianghai YANG Yuansheng DU Chengshan WANG School of Earth Sciences and Resources China University of Geosciences(Beijing)Beijing 100023China School of Earth Sciences China University of Geosciences(Wuhan)Wuhan 430074China Chinese Academy of Geological Sciences Beijing 100037China

The Late Triassic witnessed significant collisional orogenic events in the Qinling orogenic belt,accompanied by magma underplating and tectonic *** processes potentially resulted in substantial crustal thickening and uplift of the Qinling ***,due to the absence of igneous rock records from this period in the eastern section of the Qinling orogen,the changes in crustal thickness during this orogenic process have not been thoroughly investigated.A series of foreland basins emerged during the Early Mesozoic to the south of the East Qinling orogenic *** basins have preserved clastic sedimentary rocks derived from the uplift and erosion of the orogenic *** sedimentary records serve as crucial records to reconstruct the evolutionary history of the Qinling *** further clarify the collisional orogenic process of the Qinling orogenic belt,this study conducted in situ volcanic lithic fragment geochemistry,detrital zircon U-Pb chronology and trace element composition analysis on the sandstones of the Lower Jurassic Tongzhuyuan Formation in the Zigui *** results suggest that the sandstones,which exhibit a significant abundance of volcanic lithic fragments,has a characteristic detrital zircon age group of 250–200 Ma,indicating a major provenance from the Triassic volcanic *** with regional correlation and paleocurrent analysis,the detrital zircon U-Pb age data show that the source area of volcanic rocks should be in the Qinling orogenic belt to the north of the *** interpretation is further supported by the Triassic granitic rocks exposed in the western part of the orogenic belt,representing the magmatism during the Triassic collisional orogenesis in the Qinling *** on the co-varying relationships between present-day crust thickness with the chemical compositions of granite rocks and zircons,the La/Yb ratio of volcanic lithic fragments in the Tongzhuyuan Formation and the Eu/Eu*ratio of detrital zircon

关键词： Qinling orogenic belt Zigui Basin Late Triassic Detrital zircons Crustal thickening

宋代土地诉讼中的恤孤幼寡老思想--以《名公书判清明集》判词为中心

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政法论坛 2024年第1期42卷 134-144页

作者：柴荣北京师范大学法学院

恤孤幼寡老的德治仁爱思想是中国古代优秀法文化的重要内容之一。土地作为基本的生产生活资料,对孤幼寡老的生活保障和精神抚慰都具有重要意义。宋代在涉及孤幼寡老的土地诉讼中,对这些弱势群体土地权益的保护,在立法和司法中均有体现:... 详细信息

恤孤幼寡老的德治仁爱思想是中国古代优秀法文化的重要内容之一。土地作为基本的生产生活资料,对孤幼寡老的生活保障和精神抚慰都具有重要意义。宋代在涉及孤幼寡老的土地诉讼中,对这些弱势群体土地权益的保护,在立法和司法中均有体现:其一,以律典敕令等法律形式,形成了“检校”等特别保护法律规范;其二,以仁爱为指导,通过“国法”与“情理”融合的方式,在司法实践中,对法律进行目的扩张性解释。从历史语境分析,中国古代对孤幼寡老的特别法律保护缘起于周代,宋代相对完备的恤孤幼寡老社会保障思想制度是自古传统人道法文化的延续丰富。从社会效果分析,宋代土地诉讼中对孤幼寡老的特别保护,是地方官府通过个案实践追求德治,以实现法律的仁政教化社会功能的重要路径。

关键词：宋代土地诉讼恤孤幼恤寡老《名公书判清明集》

Structural knowledge-driven meta-learning for task offloading in vehicular networks with integrated communications,sensing and computing

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Journal of Information and Intelligence 2024年第4期2卷 302-324页

作者： Ruijin Sun Yao Wen Nan Cheng Wei Wang rong chai Yilong Hui State Key Laboratory of ISN Xidian UniversityXi'an 710071China Chongqing Key Laboratory of Mobile Communication Technology Chongqing University of Posts and TelecommunicationsChongqing 400065China

Task offloading is a potential solution to satisfy the strict requirements of computation-intensive and latency-sensitive vehicular applications due to the limited onboard computing ***,the overwhelming upload traffic may lead to unacceptable uploading *** tackle this issue,for tasks taking environmental data as input,the data perceived by roadside units(RSU)equipped with several sensors can be directly exploited for computation,resulting in a novel task offloading paradigm with integrated communications,sensing and computing(I-CSC).With this paradigm,vehicles can select to upload their sensed data to RSUs or transmit computing instructions to RSUs during the *** optimizing the computation mode and network resources,in this paper,we investigate an I-CSC-based task offloading problem to reduce the cost caused by resource consumption while guaranteeing the latency of each *** this nonconvex problem can be handled by the alternating minimization(AM)algorithm that alternatively minimizes the divided four sub-problems,it leads to high computational complexity and local optimal *** tackle this challenge,we propose a creative structural knowledge-driven meta-learning(SKDML)method,involving both the model-based AM algorithm and neural ***,borrowing the iterative structure of the AM algorithm,also referred to as structural knowledge,the proposed SKDML adopts long short-term memory(LSTM)networkbased meta-learning to learn an adaptive optimizer for updating variables in each sub-problem,instead of the handcrafted counterpart in the AM ***,to pull out the solution from the local optimum,our proposed SKDML updates parameters in LSTM with the global loss *** results demonstrate that our method outperforms both the AM algorithm and the meta-learning without structural knowledge in terms of both the online processing time and the network performance.

关键词： Knowledge-driven meta-learning Integration of communication Sensing and computing Task offloading Vehicular networks

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基于通感融合的无人机预编码及飞行轨迹设计

电子与信息学报 2024年第4期46卷 1266-1275页

作者：柴蓉崔相霖孙瑞锦陈前斌重庆邮电大学通信与信息工程学院重庆400065 综合业务网理论及关键技术国家重点实验室西安电子科技大学西安710126

无人机(UAVs)具有机动性强,低成本及易部署等特性,通过搭载通信及感知设备,支持通信与感知技术的高效资源共享,无人机可作为融合通信与传感技术的高性能空中平台。该文针对多输入多输出(MIMO)无人机使能的联合通信、感知场景,综合考虑... 详细信息

无人机(UAVs)具有机动性强,低成本及易部署等特性,通过搭载通信及感知设备,支持通信与感知技术的高效资源共享,无人机可作为融合通信与传感技术的高性能空中平台。该文针对多输入多输出(MIMO)无人机使能的联合通信、感知场景,综合考虑无人机飞行能量、多天线传输及用户业务需求等限制条件,建模无人机通信、感知预编码及飞行轨迹联合优化问题为多目标优化问题,以实现通信用户最低速率最大化及目标最小发现概率最大化。由于通信用户最低速率最大化问题为非凸优化问题,难以直接求解,将原优化问题分解为通信预编码设计子问题及无人机轨迹设计子问题,并采用交替迭代法依次求解两个子问题直至算法收敛,其中,对于通信预编码设计子问题,提出一种基于迫零(ZF)算法的求解策略;对于无人机轨迹设计子问题,提出一种基于连续凸逼近(SCA)算法的求解策略。基于所得到的无人机最优轨迹,将无人机感知位置选择问题建模为加权距离和最小化问题,进而应用泛搜索算法优化确定目标感知位置,并设计基于ZF算法的通信感知预编码联合优化策略,以实现通信感知性能的联合优化。最后通过仿真验证了该文所提算法的有效性。

关键词：无人机通感联合轨迹优化预编码设计

Different endodontic treatments induced root development of two nonvital immature teeth in the same patient:A case report

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World Journal of Clinical Cases 2023年第11期11卷 2567-2575页

作者： rong chai Xiu Yang An-Sheng Zhang Department of Stomatology Xi'an International Medical Center Hospital Affiliated to Northwest UniversityXi'an 710061Shaanxi ProvinceChina

BACKGROUND Pulp revascularization is a novel way to treat immature teeth with periapical disease,and the technique has become increasingly well established in recent *** puncturing the periapical tissue,bleeding is induced,and a blood clot is formed in the root *** blood clot acts as a natural bioscaffold onto which mesenchymal stem cells from periapical tissue can be seeded and restore pulp vascularity,thus promoting root development as well as apical *** the effect of pulp revascularization is ideal,there are certain requirements for the apical condition of the *** apical barrier technique and apexification are still indispensable for teeth that cannot achieve ideal blood clot *** addition,a meta-analysis of several clinical studies concluded that pulp revascu-larization has no significant advantages over other *** SUMMARY A 10-year-old girl complained of pain in the right upper and lower posterior teeth for 2 *** and radiological examinations revealed that both the right maxillary and mandibular second premolars were immature with periapical *** right maxillary second premolar was treated by pulp revascu-larization,while the right mandibular second premolar was treated by conven-tional apical barrier surgery after revascularization *** purpose of this report is to compare the different root maturation processes induced by the pulp revascularization and apical barrier techniques in the same patient in homonymous teeth from different *** months of follow-up showed that the apical foramen of both teeth presented a clear tendency to close;however,the tooth treated with pulp revascularization showed a significant increase in root length as well as root canal wall *** For the treatment of nonvital immature teeth,pulp revascularization showed a superior therapeutic effect in comparison with the apical barrier technique.

关键词： Nonvital immature tooth Central cusp deformity Pulp revascularization Apical barrier technique Root canal Case report

Digital Twin-Assisted Knowledge Distillation Framework for Heterogeneous Federated Learning

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China Communications 2023年第2期20卷 61-78页

作者： Xiucheng Wang Nan Cheng Longfei Ma Ruijin Sun rong chai Ning Lu School of Telecommunications Engineering Xidian UniversityXi’an 710071China Chongqing Key Laboratory of Mobile Communications Technology Chongqing University of Posts and TelecommunicationsChongqing 400065China Department of Electrical and Computer Engineering Queen’s UniversityKingston K7L 3N6OntarioCanada

In this paper,to deal with the heterogeneity in federated learning(FL)systems,a knowledge distillation(KD)driven training framework for FL is proposed,where each user can select its neural network model on demand and distill knowledge from a big teacher model using its own private *** overcome the challenge of train the big teacher model in resource limited user devices,the digital twin(DT)is exploit in the way that the teacher model can be trained at DT located in the server with enough computing ***,during model distillation,each user can update the parameters of its model at either the physical entity or the digital *** joint problem of model selection and training offloading and resource allocation for users is formulated as a mixed integer programming(MIP)*** solve the problem,Q-learning and optimization are jointly used,where Q-learning selects models for users and determines whether to train locally or on the server,and optimization is used to allocate resources for users based on the output of *** results show the proposed DT-assisted KD framework and joint optimization method can significantly improve the average accuracy of users while reducing the total delay.

关键词： federated learning digital twin knowledge distillation heterogeneity Q-learning convex optimization

Oxygen-evolving photosynthetic cyanobacteria for 2D bismuthene radiosensitizer-enhanced cancer radiotherapy

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Bioactive Materials 2022年第11期7卷 276-288页

作者： rong chai Luodan Yu Caihong Dong Yipengchen Yin Sheng Wang Yu Chen Qin Zhang Department of Radiation Oncology Shanghai Chest HospitalShanghai Jiao Tong UniversityShanghai200030PR China Materdicine Lab School of Life SciencesShanghai UniversityShanghai200444PR China Department of Ultrasound Zhongshan HospitalFudan Universityand Shanghai Institute of Medical ImagingShanghai200032PR China Department of Colorectal Surgery Fudan University Shanghai Cancer CenterShanghai200032PR China

The local hypoxic tumor environment substantially hampers the therapeutic efficiency of radiotherapy, which typically requires the large X-ray doses for tumor treatment but induces the serious side effects. Herein, a bio-mimetic radiosensitized platform based on a natural in-situ oxygen-evolving photosynthetic cyanobacteria combined with two-dimensional (2D) bismuthene with high atomic-number (Z) components, is designed and engineered to effectively modulate the radiotherapy-resistant hypoxic tumor environment and achieve sufficient radiation energy deposition into tumor. Upon the exogenous sequential irradiation of 660 nm laser and X-ray beam, continuous photosynthetic oxygen evolution by the cyanobacteria and considerable generation of reactive oxygen species by the 2D bismuthene radiosensitizer substantially augmented the therapeutic efficacy of radiotherapy and suppressed the in vivo tumor growth, as demonstrated on both LLC-lung tumor xenograft-bearing C57/B6 mice model and 4T1-breast tumor xenograft-bearing Balb/c mice model, further demon-strating the photosynthetic hypoxia-alleviation capability and radiosensitization performance of the engineered biomimetic radiosensitized platform. This work exemplifies a distinct paradigm on the construction of microorganism-enabled tumor-microenvironment modulation and nanoradiosensitizer-augmented radiotherapy for efficient tumor treatment.

关键词： Cyanobacteria Photosynthesis 2D bismuthene Radiosensitization Hypoxia alleviation

Energy consumption optimization-based joint route selection and flow allocation algorithm for software-defined networking

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Science China(Information Sciences) 2017年第4期60卷 71-84页

作者： rong chai Haipeng LI Feiying MENG Qianbin CHEN Key Laboratory of Mobile Communication Technologies Chongqing University of Posts and Telecommunications

Software-defined networking(SDN) is expected to dramatically simplify network control processes,enable the convenient deployment of sophisticated networking functions, and support user applications with guaranteed quality of service(Qo S). To achieve data packet transmission between two non-adjacent switches in SDN, an efficient route selection algorithm should be designed. In this paper, we consider the data transmission of multiple user flows over SDN. Under the assumption that flow splits at intermediate switches are allowed,we jointly study the route selection and flow allocation problem. To stress the problem of resource competition among various user flows, we apply network virtualization technology and propose a virtual network architecture based on the design of an optimal joint route selection and flow allocation algorithm. Jointly considering the transmission performance of multiple user flows and stressing the importance of energy consumption at transmission links and switches, we formulate the total energy consumption of user flows and design an optimization problem that minimizes the energy consumption, subject to data transmission and service requirement constraints of the flows. Because the formulated optimization problem is an NP-complete problem that cannot be conveniently solved, we transform it into a minimum-cost commodity flow problem and solve the problem by using an N-algorithm. Numerical results demonstrate the effectiveness of the proposed algorithm.

关键词： software-defined networking virtualization route selection flow allocation energy consumption

Fasudil-modified macrophages reduce inflammation and regulate the immune response in experimental autoimmune encephalomyelitis

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Neural Regeneration Research 2024年第3期19卷 671-679页

作者： Chunyun Liu Shangde Guo rong Liu Minfang Guo Qing Wang Zhi chai Baoguo Xiao Cungen Ma Institute of Brain Science Shanxi Datong UniversityDatongShanxi ProvinceChina The Key Research Laboratory of Benefiting Qi for Acting Blood Cireulation Method to Treat Multiple Sclerosis of State Administration of Traditional Chinese Medicine/Research Center of Neurobiology Shanxi University of Chinese MedicineTaiyuanShanxi ProvinceChina Institute of Neurology Huashan HospitalInstitutes of Brain Science and State Key Laboratory of Medical NeurobiologyFudan UniversityShanghaiChina

Multiple sclerosis is characterized by demyelination and neuronal loss caused by inflammatory cell activation and infiltration into the central nervous *** polarization plays an important role in the pathogenesis of experimental autoimmune encephalomyelitis,a traditional experimental model of multiple *** study investigated the effect of Fasudil on macrophages and examined the therapeutic potential of Fasudil-modified macrophages in experimental autoimmune *** found that Fasudil induced the conversion of macrophages from the pro-inflammatory M1 type to the anti-inflammatory M2 type,as shown by reduced expression of inducible nitric oxide synthase/nitric oxide,interleukin-12,and CD16/32 and increased expression of arginase-1,interleukin-10,CD14,and CD206,which was linked to inhibition of Rho kinase activity,decreased expression of toll-like receptors,nuclear factor-κB,and components of the mitogen-activated protein kinase signaling pathway,and generation of the pro-inflammatory cytokines tumor necrosis factor-α,interleukin-1β,and ***,Fasudil-modified macrophages effectively decreased the impact of experimental autoimmune encephalomyelitis,resulting in later onset of disease,lower symptom scores,less weight loss,and reduced demyelination compared with unmodified *** addition,Fasudil-modified macrophages decreased interleukin-17 expression on CD4^(+)T cells and CD16/32,inducible nitric oxide synthase,and interleukin-12 expression on F4/80^(+)macrophages,as well as increasing interleukin-10 expression on CD4^(+)T cells and arginase-1,CD206,and interleukin-10 expression on F4/80^(+)macrophages,which improved immune regulation and reduced *** findings suggest that Fasudil-modified macrophages may help treat experimental autoimmune encephalomyelitis by inducing M2 macrophage polarization and inhibiting the inflammatory response,thereby providing new insight into cell immunotherapy for m

关键词： anti-inflammatory experimental autoimmune encephalomyelitis Fasudil macrophage multiple sclerosis pro-inflammatory Rho kinase