Operational Modal Analysis of Civil Engineering Structures with Closely Spaced Modes Based on Improved Hilbert-Huang Transform.

In long-span bridges and high-rise buildings, closely spaced modes are commonly observed, which greatly increases the challenge of identifying modal parameters. Hilbert-Huang transform (HHT), a widely used method for modal parameter identification, first applies empirical mode decomposition (EMD) to decompose the acquired response and then uses the Hilbert transform (HT) to identify the modal parameters. However, the problem is that the deficiency of mode separation of EMD in HHT limits its application for structures with closely spaced modes.

Clinical features and prognosis of severe meconium aspiration syndrome with acute respiratory distress syndrome.

Objectives: To study the clinical features and prognosis of neonates with severe meconium aspiration syndrome (MAS) and acute respiratory distress syndrome (ARDS).

Methods: A retrospective analysis was performed on the medical data of 60 neonates with severe MAS who were admitted from January 2017 to December 2019. According to the presence or absence of ARDS, they were divided into two groups: ARDS (=45) and non-ARDS (=15).

BCL-xL is correlated with disease severity in neonatal infants with early sepsis.

Background: Sepsis is the most common cause of morbidity and mortality in neonatal infants. It is essential to find an accurate and sensitive biomarker to confirm and treat neonatal sepsis in order to decrease the rate of mortality. The aim of this study was to investigate the association between disease severity in patients with sepsis and TNF-α, B cell lymphoma-extra-large (BCL-xL), and serum Mitochondrial membrane potential (MMP).

The effect of different modes of microneedling technique on random flap survival in rats.

Objective: The investigation and practice of physical therapy in flap surgery are still scare. The purpose of this study is to evaluate the impact of different microneedling interventions on survival of random pattern flaps in rats, attempting to determine the optimal microneedling protocols for improvement of flap survival.

Methods: Eighty male Sprague-Dawley rats were randomly divided into four groups, with 20 in each group (group A, B, C, and D).

Use of Neonatal Lung Ultrasound for the Early Detection of Pneumothorax.

Objective: Pneumothorax (PTX) can be diagnosed using lung ultrasonography (LUS) in adult patients, but there are only a few reports of LUS in PTX diagnosis in neonates. The aim of the study was to assess the diagnostic accuracy for PTX.

Study Design: This was a retrospective review study performed in our neonatal intensive care unit (level III) between June 2015 and June 2018.

Fabrication and characterization of bit-patterned media beyond 1.5 Tbit/in2.

We fabricated bit-patterned media (BPM) at densities as high as 3.3 Tbit/in(2) using a process consisting of high-resolution electron-beam lithography followed directly by magnetic film deposition. By avoiding pattern transfer processes such as etching and liftoff that inherently reduce pattern fidelity, the resolution of the final pattern was kept close to that of the lithographic step.