Search Results - Lei Li

Photoacoustic tomography (PAT) is an emerging biomedical imaging technology that combines the molecular sensitivity of optical imaging with the spatial resolution of ultrasonic imaging in deep tissue. Molecular PAT, a subset of PAT, takes advantage of the specific absorption of molecules to reveal t...

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The early detection of Alzheimer’s disease (AD) in cognitively healthy individuals remains a major preclinical challenge. EEG is a promising tool that has shown effectiveness in detecting AD risk. Task-related EEG has been rarely used in Alzheimer’s disease research, as most studies have focused on...

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<h4>Objective</h4>This study aims to evaluate the efficacy of the Mini Clinical Evaluation Exercise (Mini-CEX) in conjunction with Case-Based Learning (CBL) and mind mapping methodologies in fostering the clinical competencies of ultrasound residents.<h4>Methods</h4>A cohort...

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Worldwide, breast cancer ranks among the cancers with the highest incidence rate. Early diagnosis is crucial to improve the survival rate of patients. Digital Mammography (DM) is widely used for breast cancer diagnosis. The disadvantage is that DM relies too much on the doctor’s experience, which ca...

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We report on the numerical results of period timing bifurcations in a dispersion-managed (DM) fiber laser with zero group velocity dispersion (GVD).The fiber laser is passively mode-locked by using the nonlinear polarization rotation technique. Period-tripling bifurcation route to chaos is numerical...

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Remarkably enhanced light emission efficiency of AlGaN multiple quantum wells (MQWs) was realized by growing on an n-AlGaN underlying layer (UL). The parasitic peaks emitting from inactive regions can be effectively suppressed, and the nonradiative recombination process in AlGaN MQWs proved to be su...

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Objective: This study was found to demonstrate whether red blood cell distribution width -to-albumin ratio (RA) can effectively evaluate the prognosis of Cardiogenic shock (CS) patients and to explore the relationship between RA vs. inflammation and water retention. Methods: This cohort study includ...

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Robots are increasingly being used across industries, healthcare, and service sectors to perform a wide range of tasks. However, as these tasks become more complex and environments more unpredictable, the need for adaptable robots continues to grow—bringing with it greater technological challenges....

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Previous studies have demonstrated that income has a significant effect on food demand in rural China. However, little research has focused on the dynamic impact of income and income distribution on food demand in rural China. Using China Health and Nutrition Survey data, this study employs a consis...

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In multi-source magnetic devices (MSMDs), the magnetization states of permanent magnets (PMs) are affected by the superimposed magnetic fields generated by surrounding PMs, making the accurate evaluation and selection of their practical magnetic properties highly challenging. This interference is pa...

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Indeno[1,2⁃d]pyridazine derivatives have wide applications in pesticides,pharmaceuticals,and other fields due to their excellent biological activities.Therefore,the development of rapid and efficient synthetic methods for these compounds has attracted increasing attention from researchers.A novel ac...

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ObjectiveTo develop an evaluation system for assessing multidimensional social deprivation among rural older adults in China, and to provide a measurement tool for understanding the current status of multidimensional social deprivation among this population. MethodsA preliminary multidimensional soc...

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BackgroundMenopause is a significant phase in a woman’s life and is characterized by the cessation of ovarian function and a decline in endogenous ovarian hormone levels. This hormonal transition is often accompanied by debilitating symptoms, such as hot flushes, which can significantly impair quali...

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Thermal comfort in indoor environments of community senior centers plays a critical role in the well-being of older adults. This study examines the impact of seasonal variation on thermal perception and explores differences across health conditions, activity levels, and age groups. Field meteorologi...

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BackgroundCOVID-19 enters human cells by binding its surface protein to angiotensin-converting enzyme 2 (ACE2) present in the host. ACE2 is expressed in various organ cells in the human body. Consequently, SARS-CoV-2 can invade gastrointestinal epithelial cells through ACE2, leading to the manifesta...

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This paper focuses on the integrated modeling and disturbance rejection of the aerial work quadrotor with a robotic arm. First, to address the issues of model incompleteness and parameter uncertainty commonly encountered in traditional Newton–Euler-based modeling approaches for such a system, the La...

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The response of extreme precipitation (EP) to temperature exhibits pronounced scale-dependent characteristics under global warming. This study investigates the spatio-temporal characteristics of EP and its association with temperature across diurnal to interannual scales during the warm season (May-...

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Exploring the influencing factors of COVID-19 vaccine hesitancy and summarizing countermeasures is of great significance for effectively addressing potential public health crises. Based on survey data from China, we employed a Gradient Boosting Decision Tree (GBDT) model and conducted SHAP interpret...

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