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DSP-TMM:A Robust Cluster Analysis Method Based on Diversity Self-Paced T-Mixture Model

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Journal of Beijing Institute of Technology 2020年第4期29卷 531-543页

作者： Limin Pan Xiaonan Qin senlin luo Information System and Security&Countermeasures Experimental Center Beijing Institute of TechnologyBeijing 100081China

In order to implement the robust cluster analysis,solve the problem that the outliers in the data will have a serious disturbance to the probability density parameter estimation,and therefore affect the accuracy of clustering,a robust cluster analysis method is proposed which is based on the diversity self-paced t-mixture *** model firstly adopts the t-distribution as the submodel which tail is easily *** this basis,it utilizes the entropy penalty expectation conditional maximal algorithm as a pre-clustering step to estimate the initial *** that,this model introduces l2,1-norm as a self-paced regularization term and developes a new ECM optimization algorithm,in order to select high confidence samples from each component in ***,experimental results on several real-world datasets in different noise environments show that the diversity self-paced t-mixture model outperforms the state-of-the-art clustering *** provides significant guidance for the construction of the robust mixture distribution model.

关键词： cluster analysis Gaussian mixture model t-distribution mixture model self-paced learning initialization

Byte-Level Function-Associated Method for Malware Detection

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Computer Systems Science & Engineering 2023年第7期46卷 719-734页

作者： Jingwei Hao senlin luo Limin Pan Information System&Security and Countermeasures Experiments Center Beijing Institute of TechnologyBeijing100081China

The byte stream is widely used in malware detection due to its independence of reverse ***,existing methods based on the byte stream implement an indiscriminate feature extraction strategy,which ignores the byte function difference in different segments and fails to achieve targeted feature extraction for various byte semantic representation modes,resulting in byte semantic *** address this issue,an enhanced adversarial byte function associated method for malware backdoor attack is proposed in this paper by categorizing various function bytes into three functions involving structure,code,and *** Minhash algorithm,grayscale mapping,and state transition probability statistics are then used to capture byte semantics from the perspectives of text signature,spatial structure,and statistical aspects,respectively,to increase the accuracy of byte semantic ***,the three-channel malware feature image is constructed based on different function byte semantics,and a convolutional neural network is applied for *** on multiple data sets from 2018 to 2021 show that the method can effectively combine byte functions to achieve targeted feature extraction,avoid byte semantic confusion,and improve the accuracy of malware detection.

关键词： Byte function malware backdoor attack semantic representation model visualization

Chinese Named Entity Recognition with Character-Level BLSTM and Soft Attention Model

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Journal of Beijing Institute of Technology 2020年第1期29卷 60-71页

作者： Jize Yin senlin luo Zhouting Wu Limin Pan Information System and Security&Countermeasures Experimental Center Beijing Institute of TechnologyBeijing 100081China

Unlike named entity recognition(NER)for English,the absence of word boundaries reduces the final accuracy for Chinese *** avoid accumulated error introduced by word segmentation,a deep model extracting character-level features is carefully built and becomes a basis for a new Chinese NER method,which is proposed in this *** method converts the raw text to a character vector sequence,extracts global text features with a bidirectional long short-term memory and extracts local text features with a soft attention model.A linear chain conditional random field is also used to label all the characters with the help of the global and local text *** based on the Microsoft Research Asia(MSRA)dataset are designed and *** show that the proposed method has good performance compared to other methods,which proves that the global and local text features extracted have a positive influence on Chinese *** more variety in the test domains,a resume dataset from Sina Finance is also used to prove the effectiveness of the proposed method.

关键词： Chinese named entity recognition(NER) character-level bidirectional long short-term memory soft attention model

Experimental study on the shear performance of quasi-NPR steel bolted rock joints

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Journal of Rock Mechanics and Geotechnical Engineering 2023年第2期15卷 350-362页

作者： Manchao He Shulin Ren Haotian Xu senlin luo Zhigang Tao Chun Zhu State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and TechnologyBeijing100083China School of Mechanics and Civil Engineering China University of Mining and TechnologyBeijing100083China School of Earth Sciences and Engineering Hohai UniversityNanjing210098China

Quasi-NPR(negative Poisson’s ratio)steel is a new type of super bolt material with high strength,high ductility,and a micro-negative Poisson’s *** material overcomes the contrasting characteristics of the high strength and high ductility of steel and it has significant energy-absorbing characteristics,which is of high value in deep rock and soil support ***,research on the shear resistance of quasi-NPR steel has not been carried *** study the shear performance of quasi-NPR steel bolted rock joints,indoor shear tests of bolted rock joints under different normal stress conditions were carried out.Q235 steel and#45 steel,two representative ordinary bolt steels,were set up as a control group for comparative tests to compare and analyze the shear strength,deformation and instability mode,shear energy absorption characteristics,and bolting contribution of different types of *** results show that the jointed rock masses without bolt reinforcement undergo brittle failure under shear load,while the bolted jointed rock masses show obvious ductile failure *** shear deformation ca-pacity of quasi-NPR steel is more than 3.5 times that of Q235 steel and#45 *** fracture occurs in the quasi-NPR steel during large shear deformation and it can provide stable shear ***,the other two types of control bolts become fractured under the same ***-NPR steel has significant energy-absorbing characteristics under shear load and has obvious advantages in terms of absorbing the energy released by shear deformation of jointed rock masses as compared with ordinary *** particular,the shear force plays a major role in resisting the shear deformation of Q235 steel and#45 steel,therefore,fracture failure occurs under small bolt ***,the axial force of quasi-NPR steel can be fully exerted when resisting joint shear deformation;the steel itself does not break when large shear deformation occurs,and the

关键词： Energy absorption bolt Quasi-NPR(Negative Poisson’s ratio)steel Bolted rock joints Shear test Shear performance

Microblog Summarization via Enriching Contextual Features Based on Sentence-Level Semantic Analysis

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Journal of Beijing Institute of Technology 2017年第4期26卷 505-516页

作者： senlin luo Qianrou Chen Jia Guo Ji Zhang Limin Pan School of Information and Electronics Beijing Institute of Technology Beijing 100081 China

A novel microblog summarization approach via enriching contextual features on sentencelevel semantic analysis is proposed in this paper. At first,a Chinese sentential semantic model（ CSM） is employed to analyze the semantic structure of each microblog sentence. Then,a combination of sentence-level semantic analysis and latent dirichlet allocation is utilized to acquire extra features and related words to enrich the collection of microblog messages. The simlilarites between the two sentences are calculated based on the enriched features. Finally,the semantic weight and relation weight are calculated to select the most informative sentences,which form the final summary for microblog messages. Experimental results demonstrate the advantages of our proposed *** results indicate that introducing sentence-level semantic analysis for context enrichment can better represent sentential semantic. The proposed criteria,namely,semantic weight and relation weight enhance summary result. Furthermore,CSM is a useful framework for sentence-level semantic analysis.

关键词： microblog summariztion language models language parsing and understanding natural language processing

A rapid audio event detection method by adopting 2D-Haar acoustic super feature vector

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Chinese Journal of Acoustics 2015年第2期34卷 186-202页

作者： L Ying luo senlin GAO Xiaofang XIE Erman PAN Limin Information System and Security Countermeasures Experimental Center Beijing Institute of Technology

For accuracy and rapidity of audio event detection in the mass-data audio pro- cessing tasks, a generic method of rapidly recognizing audio event based on 2D-Haar acoustic super feature vector and AdaBoost is proposed. Firstly, it combines certain number of con- tinuous audio frames to be an ＂acoustic feature image＂, secondly, uses *** or fast Random AdaBoost feature selection algorithm to select high representative 2D-Haar pattern combinations to construct super feature vectors; thirdly, analyzes the commonality and differ- ences between subcategories, then extracts common features and reduces different features to obtain a generic audio event template, which can support the accurate identification of multi- ple sub-classes and detect and locate the specific audio event from the audio stream accurately. Experimental results show that the use of 2D-Haar acoustic feature super vector can make recog- nition accuracy 5% higher than ones that MFCC, PLP, LPCC and other traditional acoustic features yielded, and can make tile training processing 7 20 times faster and the recognition processing 5-10 times faster, it can even achieve an average precision of 93.38%, an average recall of 95.03% under the optimal parameter configuration found by grid method. Above all, it can provide an accurate and fast mass-data processing method for audio event detection.

关键词： Haar A rapid audio event detection method by adopting 2D-Haar acoustic super feature vector

Effect of dexamethasone on intelligence and hearing in preterm infants: a meta-analysis

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Neural Regeneration Research 2014年第6期9卷 637-645页

作者： Ruolin Zhang Tao Bo Li Shen senlin luo Jian Li Department of Pediatrics Second Xiangya Hospital Central South University

OBJECTIVE： A meta-analysis of published randomized controlled trials investigating the long- term effect of dexamethasone on the nervous system of preterm infants. DATA SOURCES： Online literature retrieval was conducted using The Cochrane Library （from January 1993 to June 2013）, EMBASE （from January 1980 to June 2013）, MEDLINE （from Janu- ary 1963 to June 2013）, OVID （from January 1993 to June 2013）, Springer （from January 1994 to June 2013） and Chinese Academic Journal Full-text Database （from January 1994 to June 2013）. Key words were preterm infants and dexamethasone in English and Chinese. STUDY SELECTION： Selected studies were randomized controlled trials assessing the effect of intravenous dexamethasone in preterm infants. The quality of the included papers was evaluated and those without the development of the nervous system and animal experiments were exclud- ed. Quality assessment was performed through bias risk evaluation in accordance with Cochrane Handbook 5.1.0 software in the Cochrane Collaboration. The homogeneous studies were analyzed and compared using Revman 5.2.6 software, and then effect model was selected and analyzed. Those papers failed to be included in the meta-analysis were subjected to descriptive analysis. MAIN OUTCOME MEASURES： Nervous system injury in preterm infants. RESULTS： Ten randomized controlled trials were screened, involving 1,038 subjects. Among them 512 cases received dexamethasone treatment while 526 cases served as placebo control group and blank control group. Meta-analysis results showed that the incidence of cerebral palsy, visual im- pairment and hearing loss in preterm infants after dexamethasone treatment within 7 days after birth was similar to that in the control group （RR = 1.47, 95%CI： 0.97-2.21; RR = 1.46, 95%CI： 0.97-2.20; RR = 0.80, 95%CI： 0.54-1.18; P 〉 0.05）, but intelligence quotient was significantly de- creased compared with the control group （MD = -3.55, 95%CI： -6.59 to -0.51; P = 0.02）. Prete rm infants

关键词： This study was supported by the Science and Technology Plan Program of Hunan Prov-ince No. 2011SK3234.

PENG ZU Study on Healthy Aging in China(PENG ZU Cohort):Design and Goals

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China CDC weekly 2024年第34期6卷 876-882页

作者： Ju Cui Jing Pang Liqun Zhang Juan Li Xiaolan Wu Xinyi Zhu Wei Ma senlin luo Huafang Gao Zhao Wang Jianping Cai Tiemei Zhang The Key Laboratory of Geriatrics Beijing Institute of GeriatricsInstitute of Geriatric MedicineChinese Academy of Medical ScienceBeijing Hospital/National Center of Gerontology of National Health CommissionBeijingChina Beijing Institute of Geriatrics Beijing HospitalBeijingChina Institute of Geriatric Medicine Chinese Academy of Medical ScienceBeijing HospitalBeijingChina Center on Aging Psychology CAS Key Laboratory of Mental HealthInstitute of PsychologyChinese Academy of SciencesBeijingChina Institute of Healthy Ageing China Research Center on AgeingBeijingChina Institute of Statistics and Big Data Renmin University of ChinaBeijingChina Beijing Institute of Technology BeijingChina National Human Genetic Resources Center National Research Institute for Family PlanningBeijingChina Department of Pharmacology School of Pharmaceutical SciencesTsinghua UniversityBeijingChina

Life expectancy is increasing,leading to the continuous aging of the population in *** the health status of the older population is crucial to achieving healthy *** primary objective of the PENG ZU Study on Healthy Aging in China(PENG ZU Cohort)is to understand the natural progression of health status among the aging Chinese ***,the PENG ZU cohort aims to identify and validate multidimensional aging markers,uncover the underlying mechanisms of systemic aging and functional decline,and develop novel strategies and measures to delay functional decline and adverse health outcomes,while maintaining overall good *** PENG ZU cohort consists of 26,000 individuals aged 25 to 89 years from seven major geographical regions in *** data and biospecimens are collected according to standardized procedures at baseline and follow-up *** recruitment for the PENG ZU cohort was completed in October *** extensive analysis of multidimensional health-related data and bioresources collected from the cohort is anticipated to develop methods for evaluating functional status and elucidating multilevel,cross-scale interactions and regulatory mechanisms of healthy *** findings from this study will enhance the understanding of health changes due to aging,facilitate efficient and effective interventions to maintain functional ability,and reduce the incidence and severity of age-related diseases,thereby further promoting healthy aging.

关键词： aging thereby maintain

Bronchopulmonary Dysplasia in Premature Infants with Very Low Birth Weight: A Single Centre Retrospective Study in China

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Open Journal of Pediatrics 2016年第4期6卷 295-307页

作者： Li Shen Tao Bo senlin luo Ruolin Zhang Jian Li Division of Neonatology Children’s Medical Center The Second Xiangya Hospital Central South University Changsha China Department of Neonatology The Maternal and Child Health Hospital of Hunan Province Changsha China

To investigate bronchopulmonary dysplasia (BPD) and its treatment with dexamethasone (DEX) in premature infants with birth weight (BW) < 1500 g. We retrospectively reviewed the records of preterm infants admitted to the Division of Neonatology, the Second Xiangya Hospital, Central South University between September 2011 and December 2014. Patients were excluded if they needed oxygen therapy but were lost to follow-up at ≤36 weeks post-menstrual age (PMA) or <56 days after birth, or they had severe congenital anomalies. The incidence of BPD was 18% (37/212). Gestational age (GA) was <32 weeks in all BPD patients. GA, BW, and Apgar scores were lower and hospitalization duration and pulmonary surfactant (PS) use were higher in the BPD group than in the non-BPD group (P < 0.05). Risk factors for BPD included neonatal respiratory distress syndrome, neonatal pneumonia, positive sputum culture, pulmonary hemorrhage, respiratory failure. Multivariate logistic regression revealed that GA (odds ratio [OR]: 0.479, P = 0.004) and neonatal respiratory distress syndrome (OR: 6.146, P = 0.043) were independent risk factors for BPD. DEX was administered to 26 patients after the diagnosis of BPD. After one and two weeks of DEX treatment, the oxygen requirement had significantly reduced compared to the week prior to treatment (P < 0.05), while during treatment, the weight gain rate and weight gain efficiency slower significantly than that during either of the two preceding weeks (P < 0.001). These results suggest that low GA was the most important risk factor for BPD, DEX reduced oxygen dependency but decreased weight gain.

关键词： Bronchopulmonary Dysplasia Very Low Birth Weight Infants Oxygen Therapy Dexamethasone Weight Gain