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Exercise Recommendation with Preferences and Expectations Based on Ability Computation

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Computers, Materials & Continua 2023年第10期77卷 263-284页

作者： mengjuan li Lei Niu Faculty of Artificial Intelligence in Education Central China Normal UniversityWuhan430079China

In the era of artificial intelligence,cognitive computing,based on cognitive science;and supported by machine learning and big data,brings personalization into every corner of our social *** systems are essential applications of cognitive computing in educational *** help learners personalize their learning better by computing student and exercise characteristics using data generated from relevant learning *** paper introduces a Learning and Forgetting Convolutional Knowledge Tracking Exercise Recommendation model(LFCKT-ER).First,the model computes students’ability to understand each knowledge concept,and the learning progress of each knowledge concept,and the model consider their forgetting behavior during learning ***,students’learning stage preferences are combined with filtering the exercises that meet their learning progress and *** students’ability is used to evaluate whether their expectations of the difficulty of the exercises are ***,the model filters the exercises that best match students’expectations again by students’***,we use a simulated annealing optimization algorithm to assemble a set of exercises with the highest *** the experimental results,the LFCKT-ER model can better meet students’personalized learning needs and is more accurate than other exercise recommendation systems under various metrics on real online education public datasets.

关键词： Cognitive computing personalized learning forgetting behavior exercise recommendation

ETI： an efficient index for set similarity queries

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Frontiers of Computer Science 2012年第6期6卷 700-712页

作者： lianyin JIA Jianqing XI mengjuan li Yong liU Decheng MIAO School of Computer Science&Engineering South China University of TechnologyGuangzhou 530641China Department of Computer Science Yunnan Agricultural UniversityKunming 650201China library Yunnan Normal UniversityKunming 650092China

Set queries are an important topic and have attracted a lot of attention. Earlier research mainly concentrated on set containment queries. In this paper we focus on the T-Overlap query which is the foundation of the set similarity query. To address this issue, unlike traditional algorithms that are based on an inverted index, we design a new paradigm based on the prefix tree （trie） called the expanded trie index （ETI） which expands the trie node structure by adding some new properties. Based on ETI, we convert the T- Overlap problem to finding query nodes with specific query depth equaling to T and propose a new algorithm called T- Similarity to solve T-Overlap efficiently. Then we carry out a three-step framework to extend T-Overlap to other simi- larity predicates. Extensive experiments are carried out to compare T-Similarity with other inverted index based algorithms from cardinality of query, overlap threshold, dataset size, the number of distinct elements and so on. Results show that T-Similarity outperforms the state-of-the-art algorithms in many aspects.

关键词： expanded trie index (ETI) set similarity query T-Overlap T-Similarity algorithm T-SimilarityExact algorithm

In situ polypyrrole polymerization enhances the photocatalytic activity of nanofibrous TiO2/SiO2 membranes

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Chinese Chemical Letters 2018年第1期29卷 166-170页

作者： Xiaoqiang li Jidong Wang Zimu Hu mengjuan li Kenji Ogino Department of Organic and Polymer Materials Chemistry Tokyo University of Agriculture & Technology 2-24-16 Naka-cho Koganei-city Tokyo 184-8588 Japan College of Textile & Clothing Jiangnan University Wuxi 214122 China

In this study, nanofibrous polypyrrole-coated TiO2/SiO2 （PPy@TS） membranes were fabricated by a combination of sol-gel process, electrospinning, calcination, and in situ polymerization. Samples from the electrospinning, calcination, and in situ polymerization steps were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectrosco- py, and thermogravimetry. The in situ polymerization of PPy is aimed to enhance the overall photocatalytic capability of TiO2 in the TiO2/SiO2 composite fibers. Results of the photocatalytic degradation tests demonstrated that the PPy@TS composites possess enhanced photocatalytic activity for the degradation of methyl orange.

关键词： Titanium dioxideSilicon dioxideElectrospinningPolypyrrolePhotocatalysis

Efficient 3D Hilbert Curve Encoding and Decoding Algorithms

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Chinese Journal of Electronics 2022年第2期31卷 277-284页

作者： JIA lianyin liANG Binbin li mengjuan liU Yong CHEN Yinong DING Jiaman Faculty of Information Engineering and Automation Kunming University of Science and Technology Yunnan Key Laboratory of Artificial Intelligence Kunming University of Science and Technology library Yunnan Normal University School of Information Science and Engineering Guangxi University for Nationalities School of Computing Informatics and Decision Systems Arizona State University

Hilbert curve describes a one-to-one mapping between multidimensional space and 1 D *** traditional 3D Hilbert encoding and decoding algorithms work on order-wise manner and are not aware of the difference between different input data and spend equivalent computing costs on them, thus resulting in a low efficiency. To solve this problem, in this paper we design efficient 3D state views for fast encoding and decoding. Based on the state views designed, a new encoding algorithm(JFK-3HE) and a new decoding algorithm(JFK-3HD) are proposed. JFK-3HE and JFK-3HD can avoid executing iteratively encoding or decoding each order by skipping the first 0 s in input data, thus decreasing the complexity and improving the efficiency. Experimental results show that JFK-3HE and JFK-3HD outperform the state-of-the-arts algorithms for both uniform and skew-distributed data.

关键词： order-wise manner multidimensional space encoding state-of-the-arts algorithms encoding algorithm parallel algorithms JFK-3HE statistical distributions decoding solid modelling design efficient 3D JFK-3HD traditional 3D Hilbert encoding equivalent computing costs different input data decoding algorithm Hilbert curve state views iterative methods

Fe-doped TiO_2/SiO_2 nanofibrous membranes with surface molecular imprinted modification for selective photodegradation of 4-nitrophenol

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Chinese Chemical Letters 2018年第3期29卷 527-530页

作者： Xiaoqiang li Jidong Wang mengjuan li Yang Jin Zhijie Gu Changchun liu Kenji Ogino Department of Organic and Polymer Materials Chemistry Tokyo University of Agriculture & Technology College of Textile & Clothing Jiangnan University

In this study, Fe-doped TiO2/SiO2 （Fe@TS） nanofibrous membranes with molecular imprinted modification, were fabricated by a combination of sol-gel process, electrospinning, calcination and liquid phase deposition techniques, The precursor sol was prepared from one-pot condensation of poly （vinylpyrrolidone）, ferric chloride hexahydrate, tetraethyl orthosilicate and titanium n-butoxide in the mixture solvents of N,N-dimethylformamide and ethyl alcohol. Fibrous membrane wasthen fabricated by electrospinning, followed by calcination to form the Fe@TS composite. The physicochemical properties of Fe@TS were characterized. Thereafter, 4-nitrophenol （4NP） was used as the template to deposit onto nanofibrous Fe@TS membranes, with a thin layer of molecular imprinted polymer in liquid phase. The photodegradation capabilities of 4NP and methyl orange wereexamined in both single and binary systems. The results demonstrated that molecular imprinted Fe@TS membranes exhibited excellent selectivity for photodegradation of 4NP.

关键词： Titanium dioxide Silicon dioxide Molecular imprinted polymer liquid phase deposition Electrospinning Photocatalysis

TWE‐WSD: An effective topical word embedding based word sense disambiguation

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CAAI Transactions on Intelligence Technology 2021年第1期6卷 72-79页

作者： lianyin Jia Jilin Tang mengjuan li Jinguo You Jiaman Ding Yinong Chen Faculty of Information Engineering and Automation Kunming University of Science and TechnologyKunmingChina Yunnan Key Laboratory of Artificial Intelligence Kunming University of Science and TechnologyKunmingChina library Yunnan Normal UniversityKunmingChina School of Computing Informaticsand Decision SystemsArizona State UniversityTempeArizonaUSA

Word embedding has been widely used in word sense disambiguation(WSD)and many other tasks in recent years for it can well represent the semantics of ***,the existing word embedding methods mostly represent each word as a single vector,without considering the homonymy and polysemy of the word;thus,their performances are *** order to address this problem,an effective topical word embedding(TWE)‐based WSD method,named TWE‐WSD,is proposed,which integrates Latent Dirichlet Allocation(LDA)and word *** of generating a single word vector(WV)for each word,TWE‐WSD generates a topical WV for each word under each *** integrating strategies are designed to obtain high quality contextual *** experiments on SemEval‐2013 and SemEval‐2015 for English all‐words tasks showed that TWE‐WSD outperforms other state‐of‐the‐art WSD methods,especially on nouns.

关键词： embedding Word WSD

Misdiagnosis of malignant meningioma in subcutaneous soft tissue of the forehead: A case report

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Chinese Journal of Plastic and Reconstructive Surgery 2022年第1期4卷 25-27页

作者： mengjuan li Min Qi Department of Plastic Surgery Xiangya HospitalCentral South UniversityChangsha 410008HunanChina

Meningiomas, the most common intracranial primary tumors, are always benign. Extracranial and distant metastases can occur in malignant meningiomas. This case report describes a male in his 50 s with malignant meningioma and metastases to the subcutaneous soft tissue. Preoperative color Doppler ultrasound showed that the tumor had an abundant blood flow. Intraoperative pathological examination revealed a malignant tumor. Postoperative pathological examination revealed malignant tumors in the forehead;thus, malignant meningiomas were suspected. Immunohistochemistry revealed grade Ⅲ malignant meningioma. Malignant meningiomas have the ability to readily spread and metastasize;however, cases of malignant meningiomas disintegrating the bone and metastasizing to the subcutaneous part of the head have not been reported.

关键词： Malignant meningioma Anaplastic meningioma Meningioma metastasis

The HOXC10/NOD1/ERK axis drives osteolytic bone metastasis of pan-KRAS-mutant lung cancer

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Bone Research 2024年第3期12卷 704-719页

作者： Kun li Bo Yang Yingying Du Yi Ding Shihui Shen Zhengwang Sun Yun liu Yuhan Wang Siyuan Cao Wenjie Ren Xiangyu Wang mengjuan li Yunpeng Zhang Juan Wu Wei Zheng Wangjun Yan Lei li Department of Musculoskeletal Oncology Fudan University Shanghai Cancer CenterShanghai 200032China Health Science Center East China Normal UniversityShanghai 200241China Chongqing Key Laboratory of Precision Optics Chongqing Institute of East China Normal UniversityChongqing 401120China School of life Sciences East China Normal UniversityShanghai 200241China Joint Center for Translational Medicine Shanghai Fifth People’s HospitalFudan University and School of Life ScienceEast China Normal UniversityShanghai 200240China Department of Pharmacy The General Hospital of Western Theater Command Chengdu 610083China Orthopaedic Department of Shanghai Jiao Tong University Affiliated Sixth People’s Hospital Shanghai 200233China Department of Orthopedics General Hospital of Western Theater CommandChengdu 610000China College of Medicine Southwest Jiaotong UniversityChengdu 610031P.R.China

While KRAS mutation is the leading cause of low survival rates in lung cancer bone metastasis patients,effective treatments are still ***,we identified homeobox C10(HOXC10)as a lynchpin in pan-KRAS-mutant lung cancer ... 详细信息

关键词： metastasis NOD1 HOX

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论建立扩大内需的分配机制

经济问题探索 2009年第4期 14-19页

作者：李梦娟中国社会科学院北京100101

我国经济增长过度依赖投资和对外贸易拉动,消费对经济贡献率持续走低。美国金融危机进一部暴露了我国内需不足的严重性。通过提升劳动者报酬、调节收入分配、健全社会保障可以根本扭转我国内需不足的局面。提升居民消费能力和消费倾向,... 详细信息

我国经济增长过度依赖投资和对外贸易拉动,消费对经济贡献率持续走低。美国金融危机进一部暴露了我国内需不足的严重性。通过提升劳动者报酬、调节收入分配、健全社会保障可以根本扭转我国内需不足的局面。提升居民消费能力和消费倾向,使国内消费需求成为促进我国经济持续增长的根本动力,有助于实现经济高速增长和经济社会和谐稳定。

关键词：消费需求消费倾向劳动者报酬个人所得税社会保障