作者机构：
[Li, Duantengchuan; Li, Bing; Xia, Tao] Wuhan Univ, Sch Comp Sci, Wuhan 430072, Peoples R China.;[Wang, Jing] Chongqing Univ Posts & Telecommun, Sch Automat, Chongqing 400065, Peoples R China.;[Shi, Fobo] Cent China Normal Univ, Natl Engn Res Ctr Elearning, Wuhan 430079, Peoples R China.;[Zhang, Qi; Zhang, Q] Cent China Normal Univ, Sch Informat Management, Wuhan 430079, Peoples R China.;[Li, Bing] Hubei Luojia Lab, Wuhan 430079, Peoples R China.
通讯机构：
[Li, DTC; Li, B ] W;[Zhang, Q ] C;Wuhan Univ, Sch Comp Sci, Wuhan 430072, Peoples R China.;Cent China Normal Univ, Sch Informat Management, Wuhan 430079, Peoples R China.;Hubei Luojia Lab, Wuhan 430079, Peoples R China.
关键词：
Link prediction;Knowledge graph embedding;Shallow interaction;Deep interaction;Attention mechanism;Vector tokenization
摘要：
Inferring missing information from current facts in a knowledge graph (KG) is the target of the link prediction task. Currently, existing methods embed the entities and relations of KG as a whole into a low-dimensional vector space. Nonetheless, they ignore the multi-level interactions (shallow interactions, deep interactions) among the finer-grained sub-features of entities and relations. To overcome these limitations, we present a shallow-to-deep feature interaction for knowledge graph embedding (SDFormer). It takes into account the interpretability of sub-feature tokens of entities and relations and learns shallow-to-deep interaction information between entities and relations at a more fine-grained level. Specifically, entity and relation vectors are decomposed into sub-features to represent multi-dimensional information. Then, a shallow-to-deep feature interaction method is designed to capture multi-level interactions between entities and relations. This process enriches the feature representation by modeling the interaction between sub-features. Finally, a 1-X scoring function is utilized to calculate the score of each knowledge triplet. The experimental results on several benchmark datasets show that SDFormer obtains competitive performance results and more efficient training efficiency on other comparative models and because of the shallow-to-deep feature interaction between entities and relations.
摘要：
In this report we propose two highly efficient ensemble algorithms incorporating the gPAV and the rotational pressure correction methods for computing Stokes-Darcy flow ensembles. All variables are fully decoupled including the three components of the velocity, leading to smaller linear systems to be solved at each time step. Moreover, all ensemble members share the same constant coefficient matrix for which the fast block CG method can be applied for computing the ensemble at one pass at significantly reduced computational cost. We prove the two new ensemble algorithms are unconditionally stable with respect to the modified energy without any constraints on the uncertain parameters or the time steps. We will provide details of implementation and discuss how to efficiently solve the corresponding linear systems. Numerical examples are presented to show the efficiency and effectiveness of the algorithms.
摘要：
Divergent thinking is assumed to benefit from releasing the constraint of existing knowledge (i.e. top-down control) and enriching free association (i.e. bottom-up processing). However, whether functional antagonism between top-down control-related and bottom-up processing-related brain structures is conducive to generating original ideas is largely unknown. This study was designed to investigate the effect of functional antagonism between the left inferior frontal gyrus and the right temporoparietal junction on divergent thinking performance. A within-subjects design was adopted for three experiments. A total of 114 participants performed divergent thinking tasks after receiving transcranial direct current stimulation over target regions. In particular, cathodal stimulation over the left inferior frontal gyrus and anodal stimulation over the right inferior frontal gyrus (Experiment 1), anodal stimulation over the right temporoparietal junction (Experiment 2), and both cathodal stimulation over the left inferior frontal gyrus and anodal stimulation over the right temporoparietal junction (Experiment 3) were manipulated. Compared with sham stimulation, the combination of hyperpolarization of the left inferior frontal gyrus and depolarization of the right temporoparietal junction comprehensively promoted the fluency, flexibility, and originality of divergent thinking without decreasing the rationality of generated ideas. Functional antagonism between the left inferior frontal gyrus (hyperpolarization) and right temporoparietal junction (depolarization) has a "1 + 1 > 2" superposition effect on divergent thinking.
摘要：
Revegetation is effective in improving soil quality in ecologically fragile areas. However, little is known about the impact of diverse phytomanagement strategies of tailings on soil quality and ecological security in erosion-prone areas. We investigated the water stability, soil aggregate nutrients, and the risk of heavy metal contamination of abandoned tailings under phytomanagement and in adjacent bare land on the Loess Plateau. The results showed that phytomanagement significantly enhanced soil aggregate stability, as demonstrated by higher contents of soil organic carbon (SOC), glomalin-related soil protein (GRSP), aromatic-C, and alkene-C in macro-aggregates. The pollution load index (PLI) and ecological risk index (RI) of soil heavy metals were lower in shrub/herbaceous mixed forests than in natural grasslands and planted forests. The risk of heavy metal contamination was higher in macro-aggregates (>0.25 mm) than in micro-aggregates (<0.25 mm) and was significantly and positively correlated with the SOC and GRSP contents of the aggregates. Our study demonstrates that soil aggregate quality is closely related to the fate of heavy metals. Diversified tailing revegetation measures can improve soil quality and ensure ecological security.
期刊：
Journal of King Saud University - Computer and Information Sciences,2024年36(1):101869 ISSN：1319-1578
通讯作者：
Wang, XG
作者机构：
[Wang, Xiaoguang; Zhao, Wanli; Wang, Shutong; Wang, XG] Wuhan Univ, Sch Informat Management, Wuhan 430072, Peoples R China.;[Wang, Shutong] Cent China Normal Univ, Natl Engn Res Ctr E Learning, Wuhan 430079, Peoples R China.;[Li, Duantengchuan] Wuhan Univ, Sch Comp Sci, Wuhan 430072, Peoples R China.;[Wang, Jing] Chongqing Univ Posts & Telecommun, Sch Automat, Chongqing 400065, Peoples R China.;[Wang, Xiaoguang; Wang, XG; Wang, Jing] Wuhan Univ, Intellectual Comp Lab Cultural Heritage, Wuhan 430072, Peoples R China.
通讯机构：
[Wang, XG ] W;Wuhan Univ, Sch Informat Management, Wuhan 430072, Peoples R China.;Wuhan Univ, Intellectual Comp Lab Cultural Heritage, Wuhan 430072, Peoples R China.
关键词：
Head pose estimation;Label distribution learning;Gaussian distribution;Asymmetric;Feature similarity
摘要：
Head pose estimation plays a pivotal role in various applications, including augmented reality and human–computer interaction within intelligent museum environments. Head pose estimation conventionally relies on hard labels. However, acquiring the “ground truth” through subjective means introduces an element of uncertainty into the labels for head pose estimation. The introduction of soft labels offers a potential remedy for this uncertainty. However, existing head pose estimation methods based on soft labels neglect the asymmetry of head pose. After careful observation, two types of asymmetry have been identified in human head pose: within angle and between angle asymmetry. Taking these two characteristics into account, we have devised a Double Asymmetric Distribution Learning (DADL) network model for the precise estimation of head pose angles. This model employs distinct soft label distribution mechanisms to capture within-angle and between-angle nuances in head pose variations. Thereby enhancing the interpretability, generalization capability, and classification accuracy of head pose estimation models. Extensive experiments were conducted on various widely recognized benchmarks, including the AFLW2000 and BIWI datasets. The results substantiate substantial advantages of our model over conventional approaches.
作者：
Aaij, R.;Abdelmotteleb, A. S. W.;Beteta, C. Abellan;Abudinen, F.;Ackernley, T.;...
期刊：
Journal of High Energy Physics,2024年(2) ISSN：1029-8479
通讯作者：
Aaij, R
作者机构：
[Ketel, T.; Tuning, N.; Usachov, A.; de Boer, J.; Lukashenko, V.; Galati, M. D.; Heijhoff, K.; Akiba, K.; Aaij, R.; Aaij, R; Snoch, A.; Biolchini, A.; Jans, E.; Greeven, L. M.; Geertsema, R. E.; Pellegrino, A.; Gabriel, E.; Merk, M.; van Veghel, M.; Butter, J. S.; Koppenburg, P.; Soares, M. Senghi; Klaver, S.; Gras, C. Sanchez; Raven, G.; Sole, S. Ferreres; Kostiuk, I.; Schubiger, M.; Hulsbergen, W.] Nikhef Natl Inst Subat Phys, Amsterdam, Netherlands.;[Baptista de Souza Leite, J.; De Freitas Carneiro Da Graca, U.; Massafferri, A.; Cruz Torres, M.; De Miranda, J. M.; Falcao, L. N.; Bediaga, I. B.; Gomes, A.; Torres Machado, D.; dos Reis, A. C.; Santoro, L.] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil.;[Lopes, J. H.; Polycarpo, E.; Souza De Paula, B.; Souza De Almeida, F. L.; Gandelman, M.; Rangel, M. S.; Ferreira Rodrigues, F.; Hicheur, A.; Otalora Goicochea, J. M.; Gomes, A.; De Paula, L.; Nasteva, I.; Amato, S.; Meyer Garcia, L.] Univ Fed Rio de Janeiro, Rio De Janeiro, Brazil.;[Wang, Z.; Qu, S.; Qin, N.; Ren, Z.; Tou, D. Y.; Wang, J.; Li, A.; Hu, X.; Song, Y.; Tan, Y.; Gong, G.; Lian, Z.; Kang, Y.; Qi, H. R.; Zhu, X.; Luo, Y.; Yang, D.; Mu, H.; Zeng, M.; Dong, C.; Zhang, L.] Tsinghua Univ, Ctr High Energy Phys, Beijing, Peoples R China.;[Lu, Y.; Li, Y.; Yuan, X.; Sheng, S.; Li, T.; Wang, J.; Chen, S.; Xu, Z.; Tobin, M.; Miao, D.; Jiang, X.; Batsukh, B.; Zou, Q.; Feng, M.; Liu, S.; Xiang, Z.] Inst High Energy Phys IHEP, Beijing, Peoples R China.
摘要：
The first measurement of the Z boson production cross-section at centre-of-mass energy v s = 5.02TeV in the forward region is reported, using pp collision data collected by the LHCb experiment in year 2017, corresponding to an integrated luminosity of 100 +/- 2 pb-1. The production cross-section is measured for final-state muons in the pseudorapidity range 2.0 <. < 4.5 with transverse momentum pT > 20 GeV/c. The integrated cross-section is determined to be sZ.mu+mu- = 39.6 +/- 0.7(stat) +/- 0.6(syst) +/- 0.8(lumi) pb for the di-muon invariant mass in the range 60 < M mu mu < 120 GeV/c2. This result and the differential cross-section results are in good agreement with theoretical predictions at next-to-next-to-leading order in the strong coupling constant. Based on a previous LHCb measurement of the Z boson production cross-section in pPb collisions at v sNN = 5.02TeV, the nuclear modification factor RpPb is measured for the first time at this energy. The measured values are 1.2+0.5 -0.3(stat) +/- 0.1(syst) in the forward region (1.53 < y* mu < 4.03) and 3.6+1.6 -0.9(stat)+/- 0.2(syst) in the backward region (-4.97 < y* mu < -2.47), where y* mu represents the muon rapidity in the centre-of-mass frame.
摘要：
Due to its controllable maneuverability, wide coverage, and low cost, unmanned aerial vehicle (UAV) has great potential in post-disaster rescue, cargo transport and emergency communication. Considering its limited onboard energy, energy -efficient UAV communication is a challenge. This research examines the security of simultaneous wireless information and power transfer (SWIPT) systems assisted by intelligent reflecting surfaces (IRS) and UAVs while considering the flight energy of rotary-wing UAVs. Specifically, an IRS is mounted on a UAV to enhance the quality of legitimate transmission, and artificial noise (AN) is introduced into the base station (BS) to reduce eavesdropping quality. The power splitting (PS) technology is adopted at ground devices (GDs) to simultaneously decode information and harvest energy. First, we jointly design the BS transmit beamforming, UAV-IRS phase shifts and trajectory/velocity as well as GDs PS ratio with the aim of maximizing the sum secrecy rate of all GDs. Then, an iterative algorithm is developed to address the formulated problem. In particular, additional variables are introduced to handle this complicated objective function, and the original problem is decoupled into multiple sub-problems, which can be solved alternately by invoking the successive convex approximation (SCA) and semidefinite relaxation (SDR) techniques. Finally, numerical results demonstrate that the proposed scheme exhibits a substantial performance in the security rate of SWIPT systems assisted by UAV-IRS, and its performance is improved by at least 12% compared to benchmark schemes at the flight energy budget e(thr) = 5KJ and the number of reflecting elements N-r = 25.
摘要：
In coding theory, it is important to construct codes with optimal parameters. The codes meeting the Griesmer bound are called Griesmer codes. In this paper, we prove nonexistence of some Griesmer codes of dimension four over finite fields of cardinality eight and nine using projective geometry. Moreover, we improve 24 cases on code lengths for given minimal distance and dimension four. Two precise lower bounds of code lengths have also been determined.
期刊：
Expert Systems with Applications,2024年238:122048 ISSN：0957-4174
通讯作者：
Geng, J
作者机构：
[Zhang, Jinhong; Huang, Tao; Geng, Jing] Cent China Normal Univ, Natl Engn Res Ctr Educ Big Data, Wuhan 430079, Peoples R China.;[Huang, Tao] Ningxia Normal Univ, Yinchuan 756000, Ningxia, Peoples R China.;[Yang, Huali] Wuhan Text Univ, Sch Comp Sci & Artificial Intelligence, Wuhan 430200, Peoples R China.;[Hu, Shengze; Chen, Yuxia] Cent China Normal Univ, Fac Artifcial Intelligence Educ, Wuhan 430079, Peoples R China.
通讯机构：
[Geng, J ] C;Cent China Normal Univ, Natl Engn Res Ctr Educ Big Data, Wuhan 430079, Peoples R China.
摘要：
Measuring student growth and providing diagnostic feedback are core components of cognitive diagnostic assessment. However, most current cognitive diagnostic models solely rely on data from a single occasion to diagnose student skill states, overlooking the substantial long-term information encapsulated in the learning history from multiple occasions. In this paper, we propose a long short-term attentional cognitive diagnostic (LS-ENCD) model for skill growth assessment in intelligent tutoring systems. Specifically, we first embed exercise and student features into high-dimensional vectors. Then, we use a measurement module with a bilayer architecture to establish the interaction between students and exercises, considering guessing and slipping factors. To capture long short-term dependencies on historical data, we design the long short-term learning transfer module based on the attention mechanism, which computes state transfer weights by incorporating occasion time and mastery state. Finally, extensive experimental results on four public datasets demonstrate the superiority and good interpretability of our proposed model.
期刊：
Science of The Total Environment,2024年906:167663 ISSN：0048-9697
通讯作者：
Yin, GF
作者机构：
[Yin, Gaofei; Yin, GF; Xie, Jiangliu; Ma, Dujuan; Chen, Rui] Southwest Jiaotong Univ, Fac Geosci & Environm Engn, Chengdu 610031, Peoples R China.;[Zhao, Wei] Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China.;[Xie, Qiaoyun] Univ Western Australia, Sch Engn, Perth, WA 6009, Australia.;[Wang, Cong] Cent China Normal Univ, Sch Urban & Environm Sci, Key Lab Geog Proc Anal & Simulat Hubei Prov, Wuhan 430079, Peoples R China.;[Lin, Shangrong; Yuan, Wenping] Sun Yat Sen Univ, Guangdong Prov Data Ctr Terr & Marine Ecosyst Carb, Sch Atmospher Sci, Zhuhai 519000, Peoples R China.
通讯机构：
[Yin, GF ] S;Southwest Jiaotong Univ, Fac Geosci & Environm Engn, Chengdu 610031, Peoples R China.
关键词：
Climatic limitations;Light use efficiency model;Plant photosynthesis;Tibetan plateau
摘要：
Plant photosynthesis plays an essential role in regulating the global carbon cycle. Therefore, it is essential to understand the limitations imposed by climate on plant photosynthesis to comprehend the impacts of climate change on land carbon dynamics. In this study, taking gross primary productivity as a direct representation of photosynthesis, we employed a light use efficiency model (i.e., the revised EC-LUE) and factorial analysis method to quantify the spatiotemporal variation of temperature- and water-limitations on plant photosynthesis over the Tibetan Plateau (TP) grasslands during growing season (May to October) in 1983-2018. Results revealed a clear spatiotemporal pattern of the temperature- and water-limitations: temperature is the primary climatic limiting factor in the eastern TP, while water is the primary climatic limiting factor in the western TP; the water- and temperature-limitations prevail in summer and spring/autumn, respectively. The water- and temperature-limitations intensified and alleviated, respectively, during 1983 through 2018. There also was a widespread shift from temperature-limitation to water-limitation in the TP, particularly in midsummer (August). Our findings demonstrated the shifting relative importance of climatic limitations on plant photosynthesis under changing climate, which is crucial for predicting future terrestrial carbon cycle dynamics.
作者机构：
[Liu, Lijuan; Zhang, Lizhi; Gong, JM; Meng, Mingxia; Gong, Jingming; Yao, Qingfeng; Cai, Zheng; Sun, Hongwei; Jiang, Fang] Cent China Normal Univ, Int Joint Res Ctr Intelligent Biosensing Technol &, Key Lab Pesticide & Chem Biol, Coll Chem,Minist Educ, Wuhan 430079, Peoples R China.
通讯机构：
[Gong, JM ] C;Cent China Normal Univ, Int Joint Res Ctr Intelligent Biosensing Technol &, Key Lab Pesticide & Chem Biol, Coll Chem,Minist Educ, Wuhan 430079, Peoples R China.
摘要：
As emerging contaminants in the environment, antibiotic resistance genes (ARGs) have aroused a global health crisis and posed a serious threat to ecological safety and human health. Thus, efficient and accurate onsite detection of ARGs is crucial for environmental surveillance. Here, we presented a colorimetric-photoelectrochemical (PEC) dual-mode bioassay for simultaneous detection of multiple ARGs by smartly incorporating rolling circle amplification (RCA) into a stimuli-responsive DNA nanoassembly, using the tetracycline resistance genes tetA and tetC as models. The tailored DNA nanoassembly containing RCA amplicons hybridized with specific signal probes: CuO nanoflowers-anchored signal DNA1 and HgO nanoparticles-anchored signal DNA2, respectively. Upon exposure to an acidic stimulus, numerous Cu(2+) and Hg(2+) were released, serving as the reporting agent of colorimetric/PEC dual-mode assay. The released Cu(2+) and Hg(2+) induced localized surface plasmon resonance shifts in Au nanorods and triangular Ag nanoplates through an etching process, respectively, enabling visual analysis of ARGs with distinguishing color changes. Meanwhile, numerous Cu(2+) and Hg(2+) triggered the amplified PEC variations via reacting with the photoactive layers of CuS/CdS and ZnS, respectively. Thus, a rapid and ultrasensitive colorimetric/PEC dual-mode detection of multiple ARGs was achieved with the detection limit down to 17.2 aM. Furthermore, such dual-mode bioassay could discriminate single-base mismatch and successfully determine ARGs in E. coli plasmids and sludge samples, holding great promise for point-of-care genetic diagnostics.
作者：
Liang, Ruxia;Zhang, Qian;Wang, Jianqiang;Lu, Jie
期刊：
IEEE Transactions on Neural Networks and Learning Systems,2024年35(3):3859-3873 ISSN：2162-237X
作者机构：
[Liang, Ruxia] Univ Technol Sydney, Australian Artificial Intelligence Inst AAII, Fac Engn & Informat Technol, Decis Syst & E Serv Intelligent DeSI Res Lab, Ultimo, NSW 2007, Australia.;[Liang, Ruxia] Cent China Normal Univ, Natl Engn Res Ctr Educ Big Data, Wuhan 430079, Peoples R China.;[Liang, Ruxia] Cent China Normal Univ, Fac Artificial Intelligence Educ, Wuhan 430079, Peoples R China.;[Lu, Jie; Zhang, Qian] Univ Technol Sydney, Australian Artificial Intelligence Inst, Faulty Engn & Informat Technol, Ultimo, NSW 2007, Australia.;[Wang, Jianqiang] Cent South Univ, Sch Business, Changsha 410083, Peoples R China.
关键词：
Recommender systems;Data models;Task analysis;Neural networks;Adaptation models;Social networking (online);Knowledge engineering;Cross-domain recommender systems (CDRSs);group recommender systems (GRSs);hierarchical attention network;recommender systems
摘要：
Many online services allow users to participate in various group activities such as online meeting or group buying, and thus need to provide user groups with services that they are interested. The group recommender systems (GRSs) emerge as required and provide personalized services for various online user groups. Data sparsity is an important issue in GRSs, since even fewer group-item interactions are observed. Moreover, the group and the group members have complex and mutual relationships with each other, which exacerbates the difficulty in modeling the preferences of both a group and its members for recommendation. The cross-domain recommender system (CDRS) is a solution to alleviate data sparsity and assist preference modeling by transferring knowledge from a source domain which has relatively dense data to another. The existing CDRSs are usually developed for individual users and cannot be directly applied for group recommendation. To alleviate the data sparsity issue in GRSs, we first study the cross-domain group recommendation problem and propose a hierarchical attention network-based cross-domain group recommendation method, called HAN-CDGR. HAN-CDGR takes the advantage of data from a source domain to benefit recommendation generation for both the individual users and groups in the target domain which has data sparsity and cannot generate accurate recommendation. In HAN-CDGR, a hierarchical attention network is constructed to learn and model individual and group preferences, with consideration of both group members' interactions and dynamic weights and the complex relationships between individuals and groups. Adversarial learning is used to effectively transfer knowledge from a source domain to the target domain. Extensive experiments, which demonstrate the effectiveness and superiority of our proposal, providing accurate recommendation for both individual users and groups, are conducted on three tasks.
期刊：
CONCURRENCY AND COMPUTATION-PRACTICE & EXPERIENCE,2024年36(5):e7941- ISSN：1532-0626
通讯作者：
He, H
作者机构：
[Wu, Tong; He, Hui; Zhao, Gang] Cent China Normal Univ, Fac Artificial Intelligence Educ, Wuhan, Peoples R China.;[Di, Bingbing] Henan Univ, Fac Educ, Kaifeng, Peoples R China.
通讯机构：
[He, H ] C;Cent China Normal Univ, Fac Artificial Intelligence Educ, Wuhan, Peoples R China.
摘要：
Sharing high-quality educational resources has become an effective way to promote educational equity. The traditional educational resource sharing platforms using centralized storage architecture have security issues. Recently, many studies use blockchain to achieve secure sharing of educational resources. However, the existing blockchain-based educational resource sharing schemes only use blockchain as a storage tool, and have issues such as low sharing efficiency, without considering copyright security, and lack of a trusted sharing environment, which prevents the large-scale sharing of educational resources. In response, we propose ERSChain, a novel blockchain-based educational resources sharing solution. First, we put forward a hybrid storage method that keeps the hash value of resource in the blockchain and stores the encrypted resource in the off-chain, which can alleviate the storage and computing pressure brought by massive educational resources while ensuring the integrity of resources. Second, we construct an efficient revocable ciphertext-policy attribute-based encryption algorithm to implement flexible access control and an outsourced decryption algorithm to achieve greater efficiency. Obtaining access to educational resources is possible when user's attributes meet the access policy and the user's identity does not exist in the revocation list. Third, we put forward a credit mechanism to adjust the user's credibility and a credit-based consensus mechanism to maintain the trusted sharing environment. Finally, security analysis and plentiful of experiments demonstrate that our proposed ERSChain achieves security assurance, has better applicability than similar works, and enables large-scale sharing of educational resources.
期刊：
Swarm and Evolutionary Computation,2024年85:101460 ISSN：2210-6502
通讯作者：
Chen, YN
作者机构：
[Wei, Luona] South Cent Minzu Univ, Coll Elect & Informat Engn, Wuhan 430074, Peoples R China.;[Chen, YN; Chen, Ming; Chen, Yuning; Chen, Yingwu] Natl Univ Def Technol, Coll Syst Engn, Changsha 410073, Peoples R China.;[Xing, Lining] Xidian Univ, Coll Elect Engn, Xian 710126, Peoples R China.;[Wand, Qian] Cent China Normal Univ, Natl Engn Res Ctr Educ Big Data, Wuhan 430079, Peoples R China.;[Song, Yanjie] Natl Def Univ, Beijing 100091, Peoples R China.
通讯机构：
[Chen, YN ] N;Natl Univ Def Technol, Coll Syst Engn, Changsha 410073, Peoples R China.
关键词：
Agile satellite scheduling;Multi-objective;Genetic programming;Knowledge transfer
摘要：
The multi -objective dynamic agile earth observation satellite scheduling problem (MO-DAEOSSP) aims to schedule a set of real-time arrival requests and form a reasonable observation plan to satisfy various criteria. According to the requirements in practical applications, the total profit and the average image quality of scheduled requests are taken as optimization goals in this study. Compared to manually designed heuristics and iterative -based methods used in previous research, genetic programming based hyper heuristics (GPHH) can automatically evolve high -quality heuristic rules (HRs) for real-time scheduling without being highly dependent on expert knowledge. In this paper, a knowledge -transfer based multi -objective GPHH framework (KT-MOGP) is proposed, equipped with a heuristic -based simulation considering the idle monitoring, to evolve non -dominated HRs for solving MO-DAEOSSP. The heuristic -based simulation generates feasible schedules and returns fitness values for given HRs, which are the individuals evolved by KT-MOGP. KT-MOGP applies a knowledge transfer mechanism to accelerate convergence. Once a source problem is trained, its non -dominated solutions are extracted and their feature importance is transferred to guide the initialization of another target problem, by which the knowledge generated during the training process can be fully utilized. Experimental results on three sets of instances show that KT-MOGP outperforms the existing GPHH-based method and that the evolved HRs are competitive compared to several classical constructive heuristics and multi -objective evolutionary algorithms. The results also show the effectiveness of the proposed knowledge transfer -based initialization. To the best of our knowledge, this study is the first attempt to consider both multi -objective scenarios and real-time arrival requests.
摘要：
Organic molecules bearing chiral sulfur stereocenters exert a great impact on asymmetric catalysis and synthesis, chiral drugs, and chiral materials. Compared with acyclic ones, the catalytic asymmetric synthesis of thio-heterocycles has largely lagged behind due to the lack of efficient synthetic strategies. Here we establish the first modular platform to access chiral thio-oxazolidinones via Pd-catalyzed asymmetric [3+2] annulations of vinylethylene carbonates with sulfinylanilines. This protocol is featured by readily available starting materials, and high enantio- and diastereoselectivity. In particular, an unusual effect of a non-chiral supporting ligand on the diastereoselectivity was observed. Possible reaction mechanisms and stereocontrol models were proposed. Two Pd-catalyzed asymmetric [3+2] annulations are disclosed, providing a modular platform for the enantioselective synthesis of chiral thio-oxazolidinones. Preliminary mechanistic studies are performed to rationalize the observed enantio- and diastereo-controls.+ image
期刊：
Microwave and Optical Technology Letters,2024年66(1):e33954- ISSN：0895-2477
通讯作者：
Jin, J
作者机构：
[Ma, Li; Liu, Wei] Tianjin Univ, Sch Microelect, Tianjin, Peoples R China.;[Zhang, Qi-Jun] Carleton Univ, Dept Elect, Ottawa, ON, Canada.;[Jin, Jing] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan, Peoples R China.;[Zhang, Jianan] Southeast Univ, State Key Lab Millimeter Waves, Nanjing, Peoples R China.
通讯机构：
[Jin, J ] C;Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan, Peoples R China.
关键词：
electromagnetic;finite element method;Padé via Arnoldi;single-size simplification
摘要：
Abstract This paper proposes a new Padé via Arnoldi algorithm with single‐size matrix simplification for electromagnetic (EM) fast frequency sweep. New equations are derived to reduce the double‐size system matrix to single‐size system matrix. We also propose a systematic algorithm to calculate S‐parameters using the simplified single‐size system matrix. Using the proposed algorithm, the EM responses can be obtained with the same accuracy while consuming much less time compared with that using the existing double‐size matrix Padé via Lanczos. The proposed algorithm is demonstrated by two microwave examples.
作者机构：
[Kong, Sheng; Yi, Beibei; Guo, R; Ma, Yujiao; Guo, Rui; Zhang, Guozhu; Du, Qianqian; Zhang, He; Zhang, GZ; Zheng, Jialian] Cent China Normal Univ CCNU, Int Joint Res Ctr Intelligent Biosensing Technol &, CCNU uOttawa Joint Res Ctr, Key Lab Pesticides & Chem Biol,Minist Educ,Coll Ch, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Guo, R ; Zhang, GZ] C;Cent China Normal Univ CCNU, Int Joint Res Ctr Intelligent Biosensing Technol &, CCNU uOttawa Joint Res Ctr, Key Lab Pesticides & Chem Biol,Minist Educ,Coll Ch, Wuhan 430079, Hubei, Peoples R China.
关键词：
Amines;Silylation;Copper catalysis;Hydrogen atom transfer;C-H activation
摘要：
The development of a general and selective method for alpha-C-(sp(3))-H silylation of feedstock amines has been a long-standing challenge. In this paper, we disclose a mild, general, practical, and highly regio- and diastereoselective alpha-C-(sp(3))-H silylation of various readily available acyclic, cyclic, and aromatic amines with silylboranes through a copper-catalyzed intramolecular 1,5-hydrogen atom transfer (HAT) strategy. The mild activation of 2-iodobenzamide to generate an aryl radical enabled by a ligand-coordinated silyl copper complex without additional heating or photoinduced conditions, as well as the intramolecular selective 1,5-HAT process to produce the crucial alpha-aminoalkyl radical species, is the key to the success of this chemistry. This silylation protocol has demonstrated its potential utility in the late-stage modification of structurally complex drugs and bioactive molecules. Therefore, it is expected that this method will find applications in synthetic chemistry and drug discovery.
关键词：
Semantic processing;Word sense disambiguation;Anaphora resolution;Named entity recognition;Concept extraction;Subjectivity detection
摘要：
Semantic processing is a fundamental research domain in computational linguistics. In the era of powerful pre-trained language models and large language models, the advancement of research in this domain appears to be decelerating. However, the study of semantics is multi-dimensional in linguistics. The research depth and breadth of computational semantic processing can be largely improved with new technologies. In this survey, we analyzed five semantic processing tasks, e.g., word sense disambiguation, anaphora resolution, named entity recognition, concept extraction, and subjectivity detection. We study relevant theoretical research in these fields, advanced methods, and downstream applications. We connect the surveyed tasks with downstream applications because this may inspire future scholars to fuse these low-level semantic processing tasks with high-level natural language processing tasks. The review of theoretical research may also inspire new tasks and technologies in the semantic processing domain. Finally, we compare the different semantic processing techniques and summarize their technical trends, application trends, and future directions.
摘要：
This paper proposes a bifunctional linear-to linear polarization converter with a sandwich structure that enables transmissive and reflective polarization conversions in different operating bands, simultaneously. The unit cell of the converter metasurface comprises an S-shaped wire, a dielectric slab, and an S-shaped slot, where the S-shaped wire and slot have complementary structures and a 30 degrees difference in orientation. When an x-polarized electromagnetic wave is incident on the proposed metasurface, most of the transmitted wave is y-polarized in the frequency range of 7.07 GHz to 7.46 GHz, while most of the reflected wave is y-polarized in the frequency range of 16.59 GHz to 16.91 GHz. The physical mechanism underlying these two types of polarization conversions was analyzed based on the surface current, and electric field distributions. Notably, the transmissive polarization conversion was primarily attributed to magnetic resonance, while its reflective counterpart was ascribed to electric resonance. In addition, the Jones vector and Stokes parameters were analyzed thereby elucidating the polarization characteristics of the proposed metasurface. Furthermore, simulation data demonstrated excellent agreement with the measured results of polarization conversion. The designed metasurface will promote subsequent research on bifunctional polarization converters.
期刊：
Journal of Functional Analysis,2024年286(2):110206 ISSN：0022-1236
通讯作者：
Xie, HF
作者机构：
[Luo, Peng] Cent China Normal Univ, Sch Math & Stat, Key Lab Nonlinear Anal & Applicat, Minist Educ, Wuhan 430079, Peoples R China.;[Tang, Zhongwei] Beijing Normal Univ, Sch Math Sci, Beijing 100875, Peoples R China.;[Xie, Huafei] Nanyang Normal Univ, Sch Math & Stat, Nanyang 473061, Peoples R China.
通讯机构：
[Xie, HF ] N;Nanyang Normal Univ, Sch Math & Stat, Nanyang 473061, Peoples R China.
摘要：
In this paper we study the following eigenvalue problem {-Delta v = lambda C(alpha)(p(alpha) - epsilon)vertical bar x vertical bar(alpha)u(epsilon)(p alpha-epsilon-1)v in Omega, u=0 on partial derivative Omega, where Omega subset of R-N is a smooth bounded domain containing the origin, C(alpha) = (N + alpha)(N - 2), N >= 3, p(alpha) = N+2+2 alpha/N-2, alpha > 0, epsilon > 0 is a small parameter and u(epsilon) is a single peaked solution of Henon equation {-Delta u = C(alpha)vertical bar x vertical bar(alpha)u(p alpha-epsilon) in Omega, u > 0 in Omega, u=0 on partial derivative Omega, which established by Gladiali and Grossi (2012) [21]. By using various local Pohozaev identities and blow-up analysis, we prove some asymptotic behavior of the eigen values lambda(epsilon,i) and corresponding eigen functions v(epsilon,i), i = 2, ... , Sigma(1 <= k <= 2+alpha/2) (N + 2k - 2) (N + k - 3)!/(N - 2)!k! + 2 when alpha is not an even integer. As a consequence, if 0 < alpha < 2, we have that the Morse index of the single peaked solutions is N + 1, which gives an affirmative answer to a conjecture raised by Gladiali and Grossi. (c) 2023 Elsevier Inc. All rights reserved.
