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Incurable and refractory spinal cystic echinococcosis: A case report

World Journal of Clinical Cases 2021年第33期9卷 10337-10344页

作者： Tao Zhang li-Hua Ma Hua liu song-kai li Department of Spine Surgery the 940th Hospital of Joint Logistics Support Force of Chinese PLALanzhou 730050Gansu ProvinceChina the First Hospital of Lanzhou University Lanzhou 730050Gansu ProvinceChina

BACKGROUND Although the incidence and cure rate of spinal hydatidosis are low,the recurrence rate of spinal hydatidosis is high,and the prognosis of spinal hydatidosis is ***,we report a typical case of refractory spinal hydatidosis to increase spine surgeons’awareness of the disease and reduce misdiagnosis and *** SUMMARY A 48-year-old man presented with back pain,significant weight loss,and paralysis of both lower *** patient was misdiagnosed with spinal tuberculosis in an outside ***,spinal magnetic resonance imaging(MRI)showed hyperintense cystic components on T2-weighted images and hypointensity on T1-weighted images.A lobulated,multiocular,honeycombappearance,septated cystic mass protruding intraspinally and compressing the spinal cord at segments T8–T9 was *** polycystic lobular lesions presented as a“bunch of grapes”.The EliSA test result for Echinococcus granulosus was ***,a diagnosis of spinal hydatidosis and lung hydatid disease was made,and the patient underwent left transthoracic approach lobectomy,paravertebral lesion debridement,and subtotal vertebrectomy with vertebral body replacement of segments T8 and T9 by a mesh *** patient also underwent albendazole chemotherapy before and after *** year after stopping the drug therapy,the patient developed recurrent T5 vertebral lesions and underwent a second subtotal vertebrectomy *** patient is currently in good condition and is receiving long-term medication and *** The MRI feature of a“bunch of grapes”is a typical imaging indication of spinal *** vertebrectomy is a risk factor for postoperative *** spondylectomy makes it possible to cure spinal hydatidosis,but antiparasitic drug therapy is also an important supplementary therapy to multimodal *** is preferable for patients with spinal hydatidosis to receive life-long antiparasitic medication therapy and follow-up.

关键词： Cystic echinococcosis Spinal hydatidosis Recurrence Case report

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Adaptive Consensus of Uncertain Multi-Agent Systems With Unified Prescribed Performance

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IEEE/CAA Journal of Automatica Sinica 2024年第5期11卷 1310-1312页

作者： Kun li kai Zhao Yongduan song The authors are with the School of Automation Chongqing UniversityChongqing 400044China

Dear Editor,An adaptive consensus control algorithm for uncertain multi-agent systems(MAS),capable of guaranteeing unified prescribed performance,is presented in this *** many existing prescribed performance related works,the developed control exhibits some ***,a distributed prescribed time observer is introduced so that not only each follower is able to estimate the leader’s signal within a predetermined time,but also the control design for each agent is independent with its neighbors.

关键词： agent prescribed Uncertain

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Random Forest-Based Fatigue Reliability-Based Design Optimization for Aeroengine Structures

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Computer Modeling in Engineering & Sciences 2024年第7期140卷 665-684页

作者： Xue-Qin li Lu-kai song School of Energy and Power Engineering Beihang UniversityBeijing100191China Department of Mechanical Engineering The Hong Kong Polytechnic UniversityKowloonHong Kong999077China Research Institute of Aero-Engine Beihang UniversityBeijing100191China

Fatigue reliability-based design optimization of aeroengine structures involves multiple repeated calculations of reliability degree and large-scale calls of implicit high-nonlinearity limit state function,leading to the traditional direct Monte Claro and surrogate methods prone to unacceptable computing efficiency and *** this case,by fusing the random subspace strategy and weight allocation technology into bagging ensemble theory,a random forest(RF)model is presented to enhance the computing efficiency of reliability degree;moreover,by embedding the RF model into multilevel optimization model,an efficient RF-assisted fatigue reliability-based design optimization framework is *** the low-cycle fatigue reliability-based design optimization of aeroengine turbine disc as a case,the effectiveness of the presented framework is *** reliabilitybased design optimization results exhibit that the proposed framework holds high computing accuracy and computing *** current efforts shed a light on the theory/method development of reliability-based design optimization of complex engineering structures.

关键词： Random forest reliability-based design optimization ensemble learning machine learning

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Spinal epidural hematoma after spinal manipulation therapy:Report of three cases and a literature review

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World Journal of Clinical Cases 2021年第22期9卷 6501-6509页

作者： Hua liu Tao Zhang Tao Qu Cheng-Wei Yang song-kai li Department of Spine Surgery The 940th Hospital of Joint Logistics Support Force of Chinese People’s Liberation ArmyLanzhou 730050Gansu ProvinceChina

BACKGROUND Spinal manipulation therapy(SMT)has been widely used worldwide to treat musculoskeletal diseases,but it can cause serious adverse *** epidural hematoma(SEH)caused by SMT is a rare emergency that can cause neurological *** herein report three cases of SEH after *** SUMMARY The first case was a 30-year-old woman who experienced neck pain and numbness in both upper limbs immediately after *** symptoms persisted after 3 d of conservative treatment,and she was admitted to our *** resonance imaging(MRI)demonstrated an SEH,extending from C6 to *** second case was a 55-year-old man with sudden back pain 1 d after SMT,numbness in both lower limbs,an inability to stand or walk,and difficulty *** revealed an SEH,extending from T1 to *** third case was a 28-year-old man who suddenly developed symptoms of numbness in both lower limbs 4 h after *** was unable to stand or walk and experienced mild back *** revealed an SEH,extending from T1 to *** three patients underwent surgery after failed conservative *** three cases recovered to ASIA grade E on day 5,1 wk,and day 10 after surgery,*** patients returned to normal after 3 mo of *** SEH caused by SMT is very rare,and the condition of each patient should be evaluated in full detail before *** should be diagnosed immediately and actively treated by surgery.

关键词： Spinal epidural hematoma Spinal manipulation therapy Spinal cord injury Magnetic resonance imaging Surgery Case report

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Resynchronization and remultiplexing for transcoding to H.264/AVC

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第Z1期7卷 76-81页

作者： ZHOU Jin XIONG Hong-kai song li YU song-yu Institute of Image Communication and Information Processing Shanghai Jiao Tong University Shanghai 200030 China Institute of Image Communication and Information Processing Shanghai Jiao Tong University Shanghai 200030 China Institute of Image Communication and Information Processing Shanghai Jiao Tong University Shanghai 200030 China Institute of Image Communication and Information Processing Shanghai Jiao Tong University Shanghai 200030 China

H.264/MPEG-4 AVC standard appears highly competitive due to its high efficiency, flexibility and error resilience. In order to maintain universal multimedia access, statistical multiplexing, or adaptive video content delivery, etc., it induces an immense demand for converting a large volume of existing multimedia content from other formats into the H.264/AVC format and vice versa. In this work, we study the remultiplexing and resynchronization issue within system coding after transcoding, aiming to sustain the management and time information destroyed in transcoding and enable synchronized decoding of decoder buffers over a wide range of retrieval or receipt conditions. Given the common intention of multiplexing and synchronization mechanism in system coding of different standards, this paper takes the most widely used MPEG-2 transport stream (TS) as an example, and presents a software system and the key technologies to solve the time stamp mapping and relevant buffer management. The solution reuses previous information contained in the input streams to remultiplex and resynchronize the output information with the regulatory coding and composition structure. Experimental results showed that our solutions efficiently preserve the performance in multimedia presentation.

关键词： Transport stream (TS), Remultiplex, Time stamp, Transcoding, H.264/AVC

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Lumbar disc sequestration mimicking a tumor:Report of four cases and a literature review

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World Journal of Clinical Cases 2022年第9期10卷 2883-2894页

作者： Sheng-Tang li Tao Zhang Xue-Wen Shi Hua liu Cheng-Wei Yang Ping Zhen song-kai li Department of Spine Surgery The 940^(th) Hospital of Joint Logistics Support force of Chinese People’s LiberationLanzhou 730050Gansu ProvinceChina The Second Hospital of Lanzhou University Lanzhou 730000Gansu ProvinceChina Clinical Medical College Ningxia Medical UniversityYinchuan 750000Ningxia Hui Autonomous RegionChina

BACKGROUND Disc herniation refers to the displacement of disc material beyond its anatomical *** sequestration is defined as migration of the herniated disc fragment into the epidural space,completely separating it from the parent *** fragment can move in upward,inferior,and lateral directions,which often causes low back pain and discomfort,abnormal sensation,and movement of lower *** free disc fragments detached from the parent disc often mimic spinal *** like lumbar disc herniation can cause clinical symptoms similar to spinal tumors,such as lumbar soreness,pain,numbness and weakness of lower limbs,radiation pain of lower limbs,*** is usually necessary to diagnose the disease according to the doctor’s clinical experience,and make preliminary diagnosis and differential diagnosis with the help of magnetic resonance imaging(MRI)and contrast-enhanced ***,pathological examination is the gold standard that distinguishes tumoral from non-tumoral *** report four cases of disc herniation mimicking a tumor,and all the pathological results were intervertebral disc *** SUMMARY The first case was a 71-year-old man with low back pain accompanied by left lower extremity radiating pain for 1 year,with exacerbation over the last 2 *** admission,MRI revealed a circular T2-hypointense lesion in the spinal canal of the L4 vertebral segment,with enhancement on contrast-enhanced MRI suggesting *** second case was a 74-year-old man with pain in both knees associated with movement limitation for 3 years,with exacerbation over the last 3 *** revealed an oval T2-hyperintense lesion in the spinal canal at the L4–5 level,with obvious peripheral enhancement on contrast-enhanced ***,neurilemmoma was *** third case was a 53-year-old man who presented with numbness and weakness of the lumbar spine and right lower extremity for 2 *** revealed a round T2-hyperintense lesion in the spinal canal at the L4–5 le

关键词： Disc herniation Disc sequestration Mimicking tumor Spinal tumor Surgery Case reports

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Effect of annealing treatment on the microstructure and mechanical properties of warm-rolled Mg-Zn-Gd-Ca-Mn alloys

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International Journal of Minerals,Metallurgy and Materials 2024年第10期31卷 2208-2220页

作者： Yifan song Xihai li Jinliang Xu kai Zhang Yaozong Mao Hong Yan Huiping li Rongshi Chen School of Materials Science and Engineering Shandong University of Science and TechnologyQingdao 266590China Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Shandong Key Laboratory of Advanced Aluminium Materials and Technology Binzhou Institute of TechnologyBinzhou 256606China

The basal texture of traditional magnesium alloy AZ31 is easy to form and exhibits poor plasticity at room *** address these problems,a multi-micro-alloyed high-plasticity Mg-1.8Zn-0.8Gd-0.1Ca-0.2Mn(wt%)alloy was developed using the unique role of rare earth and Ca solute *** addition,the influence of the annealing process on the grain size,second phase,texture,and mechanical properties of the warm-rolled sheet at room temperature was analyzed with the goal of developing high-plasticity mag-nesium alloy sheets and obtaining optimal thermal-mechanical treatment *** results show that the annealing temperature has a significant effect on the microstructure and properties due to the low alloying content:there are small amounts of larger-sized block and long string phases along the rolling direction(RD),as well as several spherical and rodlike particle phases inside the *** increas-ing annealing temperature,the grain size decreases and then increases,and the morphology,number,and size of the second phase also change *** particle phase within the grains vanishes at 450℃,and the grain size increases *** the full recrystal-lization stage at 300-350℃,the optimum strength-plasticity comprehensive mechanical properties are presented,with yield strengths of 182.1 and 176.9 MPa,tensile strengths of 271.1 and 275.8 MPa in the RD and transverse direction(TD),and elongation values of 27.4%and 32.3%,***,there are still some larger-sized phases in the alloy that influence its mechanical properties,which offers room for improvement.

关键词： Mg-Zn-Gd-Ca-Mn alloy annealing treatment microstructure texture dynamic recrystallization mechanical properties

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Earth-abundant Zn-dipyrrin chromophores for efficient CO2 photoreduction

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National Science Review 2024年第6期11卷 214-222页

作者： song Guo Fu-Gui Zeng Xiao-Di li kai-kai Chen Ping Wang Tong-Bu Lu Zhi-Ming Zhang Institute for New Energy Materials and Low Carbon Technologies School of Materials Science& Engineering Tianjin University of Technology

The development of strong sensitizing and Earth-abundant antenna molecules is highly desirable for CO2reduction through artificial photosynthesis. Herein, a library of Zn–dipyrrin complexes（Z-1-Z-6） are rationally designed via precisely controlling their molecular configuration to optimize strong sensitizing Earth-abundant photosensitizers. Upon visible-light excitation, their special geometry enables intramolecular charge transfer to induce a charge-transfer state, which was first demonstrated to accept electrons from electron donors. The resulting long-lived reduced photosensitizer was confirmed to trigger consecutive intermolecular electron transfers for boosting CO2-to-CO conversion. Remarkably, the Earth-abundant catalytic system with Z-6 and Fe-catalyst exhibits outstanding performance with a turnover number of >20 000 and 29.7% quantum yield, representing excellent catalytic performance among the molecular catalytic systems and highly superior to that of noble-metal photosensitizer Ir（ppy）2（bpy）+under similar conditions. Experimental and theoretical investigations comprehensively unveil the structure–activity relationship, opening up a new horizon for the development of Earth-abundant strong sensitizing chromophores for boosting artificial photosynthesis.

关键词： Zn complex photocatalysis CO2 reduction charge transfer photosensitizer

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Automatic velocity picking based on optimal key points tracking algorithm

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Petroleum Science 2024年第2期21卷 903-917页

作者： Yong-Hao Wang Wen-kai Lu song-Bai Jin Yang li Yu-Xuan li Xiao-Feng Gu The Institute for Artificial Intelligence(THUAI) Tsinghua UniversityBeijing100084China State Key Laboratory of Intelligent Technology and Systems Tsinghua UniversityBeijing100084China Beijing National Research Center for Information Science and Technology(BNRist) Beijing100084China The Department of Automation Tsinghua UniversityBeijing100084China

Picking velocities from semblances manually is laborious and necessitates experience. Although various methods for automatic velocity picking have been developed, there remains a challenge in efficiently incorporating information from nearby gathers to ensure picked velocity aligns with seismic horizons while also improving picking accuracy. The conventional method of velocity picking from a semblance volume is computationally demanding, highlighting a need for a more efficient strategy. In this study, we introduce a novel method for automatic velocity picking based on multi-object tracking. This dynamic tracking process across different semblance panels can integrate information from nearby gathers effectively while maintaining computational efficiency. First, we employ accelerated density clustering on the velocity spectrum to discern cluster centers without the requirement for prior knowledge regarding the number of clusters. These cluster centers embody the maximum likelihood velocities of the main subsurface structures. Second, our proposed method tracks key points within the semblance volume. Kalman filter is adopted to adjust the tracking process, followed by interpolation on these tracked points to construct the final velocity model. Our synthetic data example demonstrates that our proposed algorithm can effectively rectify the picking errors of the clustering algorithm. We further compare the performances of the clustering method(CM), the proposed tracking method(TM), and the variational method(VM) on a field dataset from the Gulf of Mexico. The results attest that our method offers superior accuracy than CM, achieves comparable accuracy with VM, and benefits from a reduced computational cost.

关键词： Velocity picking Multi-object tracking Density clustering Kalman filter

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The Application of Extended Reality in Treating Children with Autism Spectrum Disorder

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Neuroscience Bulletin 2024年第8期40卷 1189-1204页

作者： Weijia Zhao song Xu Yanan Zhang Dandan li Chunyan Zhu kai Wang First Clinical Medical College Anhui Medical UniversityHefei 230032China School of Biomedical Engineering Anhui Medical UniversityHefei 230032China School of Mental Health and Psychological Sciences Anhui Medical UniversityChinaHefei 230032China Research Center for Translational Medicine The Second Hospital of Anhui Medical UniversityHefei 230000China Department of Neurology The First Affiliated Hospital of Anhui Medical UniversityHefei 230032China Collaborative Innovation Center of Neuropsychiatric Disorders and Mental Health Hefei 230032China Institute of Artificial Intelligence Hefei Comprehensive National Science CenterHefei 230088China Anhui Province Key Laboratory of Cognition and Neuropsychiatric Disorders Hefei 230032China

Autism Spectrum Disorder(ASD)is a common neurodevelopmental disorder in children,characterized by social interaction,communication difficulties,and repetitive and stereotyped *** intervention methods have limitations,such as requiring long treatment periods and needing to be more convenient to *** Reality(XR)technology offers a virtual environment to enhance children's social,communication,and self-regulation *** paper compares XR theoretical models,application examples,and intervention *** study reveals that XR intervention therapy is mainly based on cognitive rehabilitation,teaching,and social-emotional learning *** utilizes algorithms,models,artificial intelligence(AI),eye-tracking,and other technologies for interaction,achieving diverse intervention *** showed effective improvement in competency barriers using XR-based multimodal interactive ***,Mixed Reality(MR)technology still requires further *** research should explore multimsodal interaction technologies combining XR and AI,optimize models,prioritize the development of MR intervention scenarios,and sustain an optimal intervention level.

关键词： Autism spectrum disorde Extended reality Multimodal interaction technologies Intervention model Treatment effectiveness evaluation

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