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Effect of Wave Nonlinearity on the Instantaneous Seabed Liquefaction

China Ocean Engineering 2024年第1期38卷 93-103页

作者： WANG Zhao-jun SUI ti-ti ZHANG Chi PAN Jun-ning Key Laboratory of Port Waterway and Sedimentation Engineering of the Ministry of TransportNanjing Hydraulic Research InstituteNanjing 210024China Key Laboratory of Coastal Disaster and Protection(Hohai University) Ministry of EducationNanjing 210098China The National Key Laboratory of Water Disaster Prevention Nanjing 210098China

The nonlinear variation of wave is commonly seen in nearshore area,and the resulting seabed response and liquefaction are of high concern to coastal *** this study,an analytical formula considering the nonlinear wave skewness and asymmetry is adopted to provide wave pressure on the seabed *** liquefaction depth attenuation coefficient and width growth coefficient are defined to quantitatively characterize the nonlinear effect of wave on seabed *** on the 2D full dynamic model of wave-induced seabed response,a detailed parametric study is carried out in order to evaluate the influence of the nonlinear variation of wave loadings on seabed ***,new empirical prediction formulas are proposed to fast predict the maximum liquefaction under nonlinear *** indicate that(1)Due to the influence of wave nonlinearity,the vertical transmission of negative pore water pressure in the seabed is hindered,and therefore,the amplitude decreases significantly.(2)In general,with the increase of wave nonlinearity,the liquefaction depth of seabed decreases *** under asymmetric and skewed wave loading,the attenuation of maximum seabed liquefaction depth is the most significant among all the nonlinear wave ***,highly skewed wave can cause the liquefaction depth of seabed greater than that under linear wave.(3)The asymmetry of wave pressure leads to the increase of liquefaction width,whereas the influence of skewedness is not significant.(4)Compared with the nonlinear waveform,seabed liquefaction is more sensitive to the variation of nonlinear degree of wave loading.

关键词： nonlinear wave seabed response seabed liquefaction numerical simulation liquefaction prediction

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Depression in HIV-Infected Compared to Their Seronegative Partners in Serodiscordant Couples in Ouagadougou (Burkina Faso)

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Open Journal of Internal Medicine 2016年第1期6卷 15-19页

作者： Oumar Guira hervé tiéno Yempabou Sagna Ismael Diallo Safyatou Sawadogo Joseph Y. Drabo Unité de Formation et de Recherche en Sciences de la Santé Université de Ouagadougou Ouagadougou Burkina Faso Service de Médecine interne Centre Hospitalier Universitaire Yalgado Ouédraogo Ouagadougou Burkina Faso

Introduction: Depression is common in HIV/AIDS. We aim to investigate the frequency and the grade of this mental disorder in partners and determine its influence on sexual dysfunctions in serodiscordant couples in Ouagadougou. Patients/Method: This cross-sectional study was monitored from 1 January to 31 June 2010 in the internal medicine department of CHUYO, Ouagadougou. HIV-infected patients and their seronegative partners who gave their consent were included. Depression was diagnosed using the Beck Depression Inventory 13 items (BDI-13). Results: Eighty heterosexual and monogamous serodiscordant couples were studied. 31 (38.7%) HIV-infected and 23 (28.7%) seronegative partners were affected by depression;p = 0.18. The score of depression was 3.5 ± 2.1 in HIV-infected and 3.3 ± 1.6 in seronegative partners;p = 0.85. Depression was diagnosed in both partners in 13 couples (16.2%) and in only one partner in 28 couples (35%). Depression was diagnosed at least for one partner in 40 (51.3%) couples where sexual dysfunctions affected partner (s) and in 1 (50%) couple where no sexual dysfunction was reported. Conclusion: Psychological assessment is needed for a better management of HIV/AIDS in serodiscordant couples.

关键词： Depression Serodiscordant Couples Burkina Faso

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Trends of Kalemia at Diagnosis of Acidosis versus Non-Acidosis Diabetic Ketosis Décompensations in Ouagadougou (Burkina Faso)

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Open Journal of Internal Medicine 2016年第1期6卷 1-5页

作者： Oumar Guira hervé tiéno Abraham Bagbila Yempabou Sagna Gérard Coulibaly Lassané Zoungrana Joseph Y. Drabo Unité de Formation et de Recherche en Sciences de la Santé Université de Ouagadougou Ouagadougou Burkina Faso Service de Médecine Interne Centre Hospitalier Universitaire Yalgado Ouédraogo Ouagadougou Burkina Faso Service de Néphrologie et d’Hémodialyse Centre Hospitalier Universitaire Yalgado Ouédraogo Ouagadougou Burkina Faso

Introduction: Electrolyte’s profile in non-acidosis diabetic ketosis is poorly specified. We aimed to determine the nature of diabetic ketosis decompensations as well as the profile of kalemia and factors associated with its disorders at diagnosis of acidosis compared to non-acidosis diabetic ketosis. Methods: The study was retrospective from 1 January 2010 to 31 December 2011 in Yalgado Ouédraogo teaching hospital. Diabetic in-patients suffering from simple ketosis, keto-acidosis or mixed decompensation, who achieved blood electrolytes assessment before intensive insulin therapy were included. Results: Sixty two patients were studied. The sex ratio was 0.7 and the mean age was 41.7 years. Keto-acidosis, simple ketosis and mixed decompensation were diagnosed respectively in 18 (29%), 32 (51.6%) and 12 (19.4%) patients. Kalemia was normal in 42 (67.7%), while hypokalemia and hyperkalemia were reported respectively in 11 (17.8%) and 9 (14.5%) patients. Kalemia was often normal in all types of ketosis decompensation and disorders of kalemia occurred more in patients with keto-acidosis (50%) than those with simple ketosis (21.9%);p = 0.04. Renal failure was diagnosed in 10 patients (50%) with and 2 (4.8%) without kalemia’s disorders;p = 0.0001. Seven patients (35%) with and 4 (9.5%) without kalemia’s disorders suffered from unconsciousness;p = 0.02. It happens more in hyperkalemia (44.4%) than in normal kalemia condition (9.5%);p = 0.02. Conclusion: If kalemia is often normal in all types of diabetic ketosis emergencies, hypokalemia is the most initial frequent potassium disorder.

关键词： Diabetic Ketosis Kalemia Disorders Burkina Faso

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<i>Aeromonas hydrophila</i>Septic Arthritis in a Patient Infected with HIV

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Open Journal of Rheumatology and Autoimmune Diseases 2013年第3期3卷 165-166页

作者： Dieu-Donné Ouédraogo Joelle tiendrébéogo/ Zabsonré hervé tiéno Ismael Diallo Abraham Bagbila Joseph Drabo Department of Internal Medicine University Hospital Yalgado Ouédraogo Ouagadougou Burkina Faso.

Septic arthritis is a medical emergency. The causative organisms are primarily staphylococcus and streptococcus. Aeromonas hydrophila septic arthritis seems to be rare. We report one case observed in a 58-year-old patient infected with HIV serotype 1 and treated by zidovudine, lamivudine and nevirapine. CD4 count was 413 cells per microliter and viral load undetectable. Two blood cultures were A. hydrophila positive. The evolution was favorable after treatment by ceftriaxone and gentamicin.

关键词： Septic Arthritis Aeromonas Hydrophila HIV

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Tumor microenvironment reprogramming by nanomedicine to enhance the effect of tumor immunotherapy

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Asian Journal of Pharmaceutical Sciences 2024年第2期19卷 1-37页

作者： Yu Huang Hui Fan Huihui ti School of Chinese Materia Medica Guangdong Pharmaceutical UniversityGuangzhou 510006China Guangdong Province Precise Medicine Big Date of Traditional Chinese Medicine Engineering Technology Research Center Guangdong Pharmaceutical UniversityGuangzhou 510006China School of Pharmacy Guangdong Pharmaceutical UniversityGuangzhou 510006China

With the rapid development of the fields of tumor biology and immunology, tumor immunotherapy has been used in clinical practice and has demonstrated significant therapeutic potential, particularly for treating tumors that do not respond to standard treatment options. Despite its advances, immunotherapy still has limitations, such as poor clinical response rates and differences in individual patient responses, largely because tumor tissues have strong immunosuppressive microenvironments. Many tumors have a tumor microenvironment (TME) that is characterized by hypoxia, low pH, and substantial numbers of immunosuppressive cells, and these are the main factors limiting the efficacy of antitumor immunotherapy. The TME is crucial to the occurrence, growth, and metastasis of tumors. Therefore, numerous studies have been devoted to improving the effects of immunotherapy by remodeling the TME. Effective regulation of the TME and reversal of immunosuppressive conditions are effective strategies for improving tumor immunotherapy. The use of multidrug combinations to improve the TME is an efficient way to enhance antitumor immune efficacy. However, the inability to effectively target drugs decreases therapeutic effects and causes toxic side effects. Nanodrug delivery carriers have the advantageous ability to enhance drug bioavailability and improve drug targeting. Importantly, they can also regulate the TME and deliver large or small therapeutic molecules to decrease the inhibitory effect of the TME on immune cells. Therefore, nanomedicine has great potential for reprogramming immunosuppressive microenvironments and represents a new immunotherapeutic strategy. Therefore, this article reviews strategies for improving the TME and summarizes research on synergistic nanomedicine approaches that enhance the efficacy of tumor immunotherapy.

关键词： Tumor immunotherapy Tumor micr oenvir onment Nanomedicine Tumor repr ogramming

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Cyber-physical Collaborative Restoration Strategy for Power Transmission System Considering Maintenance Scheduling

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CSEE Journal of Power and Energy Systems 2024年第3期10卷 1331-1341页

作者： Baozhong ti Chuanyun Zhang Jingfei Liu Zhaoyuan Wu Ziyang Huang North China Branch of State Grid Corporation of China Beijing 100053China State Grid Beijing Electric Power Company Beijing 100031China State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources School of Electrical and Electronic EngineeringNorth China Electric Power UniversityBeijing 102206China IEEE CSEE

In order to improve the ability of power transmission system to cope with compound faults on the communication side and power side,a cyber-physical collaborative restoration strategy is ***,according to the information system’s role in fault diagnosis,remote control of equipment maintenance and automatic output adjustment of generator restoration,a cyber-physical coupling model is *** this basis,a collaborative restoration model of power transmission system is established by studying interactions among maintenance schedule paths,information system operation,and power system *** on power flow linearization and the large M-ε method,the above model is transformed into a mixed integer linear programming model,whose computational burden is reduced further by the clustering *** to the parameters of IEEE39 New England system,the geographic wiring diagram of the cyber-physical system is *** results show the proposed restoration strategy can consider the support function of the information system and space-time coordination of equipment maintenance at both sides comprehensively to speed up load recovery progress.

关键词： Clustering method collaborative restoration cyber-physical power system maintenance scheduling power transmission system restoration

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Analytical libration control law for electrodynamic tether system with current constraint

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Astrodynamics 2024年第2期8卷 237-246页

作者： Shidong Xu ti Chen Hao Wen Dongping Jin State Key Laboratory of Mechanics and Control for Aerospace Structures Nanjing University of Aeronautics and AstronauticsNanjing210016China

This study focuses on stabilizing the libration dynamics of an electrodynamic tether system(EDTS)using generalized torques induced by the Lorentz *** contrast to existing numerical optimization methods,a novel analytical feedback control law is developed to stabilize the in-plane and out-of-plane motions of a tether by modulating the electric current *** saturation constraint on the current is accounted for by adding an auxiliary dynamic system to the *** enhance the robustness of the proposed controller,multiple perturbations of the orbital dynamics,modeling uncertainties,and external disturbances are approximated using a neural network in which the weighting matrix and approximation error are estimated simultaneously,such that these perturbations are well compensated for during the control design of the ***,a dynamically scaled generalized inverse is utilized to address the singular matrix in the control *** closed-loop system is proven to be ultimately bounded based on Lyapunov stability ***,numerical simulations are performed to demonstrate the effectiveness of the proposed analytical control law.

关键词： electrodynamic tether system(EDTS) libration dynamics analytical control current constraint

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Hypothyroidism in Hospitals (Burkina Faso)

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Open Journal of Internal Medicine 2021年第2期11卷 55-67页

作者： Lassane Zoungrana hervé tiéno Seydou Yaméogo Solo Traoré Oumar Guira Constance tiendrebéogo Réné Bognounou Aline Tondé Jospeh Y. Drabo Health Sciences Training and Research Unit Joseph Ki ZERBO University Ouagadougou Burkina Faso Internal Medicine Department Yalgado Ouedraogo Teaching Hospital Ouagadougou Burkina Faso Internal Medicine Service Bogodogo Teaching Hospital Ouagadougou Burkina Faso

Background: The epidemiology of hypothyroidism has been characterized by an increase in its frequency, especially in females and the elderly. Our aim was to study hypothyroidism in hospitals in Ouagadougou. Material and Method: This was a cross-sectional descriptive study with retrospective data collection covering a period of four (04) years between January 1, 2015 and December 31, 2018. It included patients followed in the internal medicine departments of three (03) teaching hospitals in the city of Ouagadougou. Yalgado OUEDRAOGO, Bogodogo and Tengandogo Teaching Hospitals, were the study setting. Results: 120 cases of hypothyroidism were enrolled. The mean age of the patients was 45.7 years with a sex ratio of 0.26. The signs frequently reported were weight gain (28.3%), asthenia (15.8%), and myalgia (15%). TSHus was elevated in 99.2% of patients in our series. The T3L assay level was lowered in 40.9%, with an average of 2.2 ± 1.5 pg/ml. T4L was lowered in 68.2% with an average of 6.6 ± 4 pg/ml. Primary hypothyroidism accounted for 99.2% of the cases, of which iatrogenic hypothyroidism was the most frequent with 77.5% followed by Hashimoto’s thyroiditis with 9.2% of the cases. Hormonal balance was achieved in the majority of patients (59.2%) who received hormonal supplementation with levothyroxine at an average dose of 84.5 μg/day. Conclusion: Hypothyroidism is common in women in their forties. Iatrogenic hypothyroidism was the predominant etiology reported in Ouagadougou.

关键词： Hypothyroidism Hospital Ouagadougou

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Mechanical response of a tunnel subjected to strike-slip faulting processes,based on a multi-scale modeling method

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Frontiers of Structural and Civil Engineering 2024年第8期18卷 1281-1295页

作者： Guoguo LIU Ping GENG tianqiang WANG Xiangyu GUO Jiaxiang WANG ti DING Key Laboratory of Transportation Tunnel Engineering Ministry of EducationChengdu 610031China College of Civil Engineering Huaqiao UniversityXiamen 361021China China Railway Design Corporation Tianjin 300308China

The stick-slip action of strike-slip faults poses a significant threat to the safety and stability of underground *** this study,the north-east area of the Longmenshan fault,Sichuan,provides the geological background;the rheological characteristics of the crustal lithosphere and the nonlinear interactions between plates are described by Burger’s viscoelastic constitutive model and the friction constitutive model,respectively.A large-scale global numerical model for plate squeezing analysis is established,and the seemingly periodic stick-slip action of faults at different crust depths is *** a second model at a smaller scale,a local finite element model(sub-model),the time history of displacement at a ground level location on the Longmenshan fault plane in a stick-slip action is considered as the displacement *** integration of these models,creating a multi-scale modeling method,is used to evaluate the crack propagation and mechanical response of a tunnel subjected to strike-slip *** determinations of the recurrence interval of stick-slip action and the cracking characteristics of the tunnel are in substantial agreement with the previous field investigation and experimental results,validating the multi-scale modeling *** can be concluded that,regardless of stratum stiffness,initial cracks first occur at the inverted arch of the tunnel in the footwall,on the squeezed side under strike-slip *** smaller the stratum stiffness is,the smaller the included angle between the crack expansion and longitudinal direction of the tunnel,and the more extensive the crack expansion *** the tunnel in a high stiffness stratum,both shear and bending failures occur on the lining under strike-slip faulting,while for that in the low stiffness stratum,only bending failure occurs on the lining.

关键词： stick-slip action plate squeezing analysis multi-scale modeling method lining cracking mechanical response

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Network Configuration Entity Extraction Method Based on Transformer with Multi-Head Attention Mechanism

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Computers, Materials & Continua 2024年第1期78卷 735-757页

作者： Yang Yang Zhenying Qu Zefan Yan Zhipeng Gao ti Wang State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing100876China Product Development Department China Unicom Smart City Research InstituteBeijing100044China

Nowadays,ensuring thequality of networkserviceshas become increasingly *** are turning toknowledge graph technology,with a significant emphasis on entity extraction in the identification of device *** research paper presents a novel entity extraction method that leverages a combination of active learning and attention ***,an improved active learning approach is employed to select the most valuable unlabeled samples,which are subsequently submitted for expert *** approach successfully addresses the problems of isolated points and sample redundancy within the network configuration sample *** the labeled samples are utilized to train the model for network configuration entity ***,the multi-head self-attention of the transformer model is enhanced by introducing the Adaptive Weighting method based on the Laplace mixture *** enhancement enables the transformer model to dynamically adapt its focus to words in various positions,displaying exceptional adaptability to abnormal data and further elevating the accuracy of the proposed *** comparisons with Random Sampling(RANDOM),Maximum Normalized Log-Probability(MNLP),Least Confidence(LC),Token Entrop(TE),and Entropy Query by Bagging(EQB),the proposed method,Entropy Query by Bagging and Maximum Influence Active Learning(EQBMIAL),achieves comparable performance with only 40% of the samples on both datasets,while other algorithms require 50% of the ***,the entity extraction algorithm with the Adaptive Weighted Multi-head Attention mechanism(AW-MHA)is compared with BILSTM-CRF,Mutil_Attention-Bilstm-Crf,Deep_Neural_Model_NER and BERT_Transformer,achieving precision rates of 75.98% and 98.32% on the two datasets,*** tests demonstrate the statistical significance and effectiveness of the proposed algorithms in this paper.

关键词： Entity extraction network configuration knowledge graph active learning transformer

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