Sökresultat - Zhi Chen

Optical stopping can serve as a light-controlled solution to implementing photonic components. In contrast to saturated optical stopping that provides enough excited electrons to entirely absorb signal lights, unsaturated optical stopping introduces a photon competition mechanism for signal lights a...

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We propose and experimentally demonstrate photonic measurement of microwave frequency by utilizing an optomechanical microring resonator (MRR). The pump powers injected into the MRR would result the resonance red-shifts based on nonlinear effects. In the case of optical single sideband modulation, t...

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Ecosystems are complex systems shaped by both self-organization and anthropogenic regulation, emerging from the dynamic interplay among water, land, climate, biota, and human activities. As the foundational habitat for human well-being, they provide essential services including ecological goods, nat...

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With the acceleration of urbanization, the development of urban rail transit networks has become an essential component of modern urban transportation. The construction of new urban rail transit lines often involves crossing existing operational lines, posing significant safety risks and technical c...

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In this work, we aimed to determine the nonlinear disturbance caused by cascaded coupling rigid–flexible deformation and friction in a direct-driven servo electric cylinder terminal positioning system (DDSEC-TPS) during feed motion of an intermittent, reciprocating, and time-varying load. For this p...

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Abstract Neurodegenerative diseases, marked by the gradual death of neurons, present a significant and growing public health challenge. Brain‐derived neurotrophic factor (BDNF) is crucial for the survival, development, and synaptic plasticity of neurons. Studies have consistently demonstrated that p...

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In recent years, global public health security has encountered significant challenges, with infectious diseases accounting for approximately 25% of global mortality annually. The worldwide pandemic instigated by the novel coronavirus, alongside the persistent threats posed by Ebola, influenza, and m...

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Abstract Background and Aims Observational studies frequently report co‐occurrence between endocrine, nutritional, and metabolic disease (ENMD) and pulmonary tuberculosis (PTB). However, the causal properties between them remain poorly defined. Our aim in this study was to investigate the causal eff...

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In this work, the physical-chemical and morphological evolution of CeO2-ZrO2 solid solutions caused by hydrothermal processing time, and its effects on catalytic diesel soot elimination were studied. SEM and TEM results show that the CeO2-ZrO2 nanocrystal particles gradually aggregate with the exten...

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Lithology identification is one of the most important research areas in petroleum engineering, including reservoir characterization, formation evaluation, and reservoir modeling. Due to the complex structural environment, diverse lithofacies types, and differences in logging data and core data recor...

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Copper-based powder metallurgy materials are common friction materials in many fields such as aviation, high-speed railway and automobiles because of their good thermal conductivity, stable friction performance and relatively high mechanical properties.In order to ensure long service life, high reli...

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As the proportion of encrypted traffic increases, it becomes increasingly challenging for network attacks to be discovered. Although existing methods combine unencrypted statistical features, e.g., average packet length, with machine learning algorithms to achieve encrypted malicious traffic detecti...

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We present a design of a single-frequency green InGaN external cavity diode laser (ECDL) with 40-mW output power and 10-MHz linewidth. The ECDL was mounted in the Littrow configuration, with an overall efficiency of approximately 52% and a tuning region of 8 nm. We analyzed the output eff...

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Objective To investigate the tolerance and efficacy of HIFU ablation for uterine fibroids with a non-perfused volume ratio (NPVR) ≥ 90%.Methods A prospective cohort study of 2411 patients from 20 clinical centers was available. Contrast-enhanced MRI was used to assess the non-perfused volume ratio (...

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Fat is an indispensable nutrient and basic metabolite for sustaining life, and milk is particularly rich in fatty acids, including a variety of saturated and unsaturated fatty acids. MicroRNA (miRNA) and mRNA play an important role in the regulation of milk fat metabolism in mammary gland tissue. It...

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T-bet (T-box transcription factor TBX21), encoded by the Tbx21 gene, is a key regulator of T helper 1 (Th1) cell differentiation and cellular immunity. However, the role of T-bet in avian species remains elusive. To investigate the role of T-bet in avian immune response, we cloned chicken T-bet (chT...

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The Platelet to lymphocyte ratio (PLR) has been reported to predict prognosis of patients with hepatocellular carcinoma (HCC). This study examined the prognostic potential of stratified PLR for HCC patients undergoing curative liver resection. Medical records were retrospectively analyzed for 778 HC...

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Excess ammonia (NH3) in the circulation of dairy animals can reduce animal health and the quality of products for human consumption. To develop effective prevention and treatment methods, it is essential to examine the molecular mechanisms through which excess NH3 may affect the mammary gland. The p...

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The aspartate aminotransferase-to-platelet ratio index has been reported to predict prognosis of patients with hepatocellular carcinoma. This study examined the prognostic potential of stratified aspartate aminotransferase-to-platelet ratio index for hepatocellular carcinoma patients undergoing cura...

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The World Health Organization (WHO) “Global Tuberculosis Report 2024” underscores the ongoing challenges and progress in the global fight against tuberculosis (TB). Despite a slowdown in the annual increase in TB cases and a decline in TB-related deaths, the disease remains a significant public heal...

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