When ships sail on the sea, changes of ship motion attitude presents characteristics nonlinearity and high randomness. Aiming at problem low accuracy roll angle prediction by traditional algorithms single neural network model, a method based bidirectional long short-term memory (Bi-LSTM) temporal pattern attention mechanism (TPA) combined deep learning model is proposed. Bidirectional extracts time features from forward reverse series, patterns output state that are beneficial to prediction,...

In vitro calf spine testing was performed in flexion, rotation, and axial load, using a vertebral body corpectomy anterior iliac crest bone grafting model. Anterior spinal fixation devices then were sequentially tested, stiffness, torsional flexural strain determined. The constructs tested the Contoured Spinal Piate (CASP), Kaneda device, Kostuik-Harrington device (KH), Texas Scottish Rite Hospital (TSRH) screw construct. torsion, returned stability to that of intact spine. unstable torsion....

Abstract Objective The purpose of this research is to evaluate the risk factors and incidence pulmonary cement embolism (PCE) during percutaneous vertebroplasty (PVP) or kyphoplasty (PKP) for osteoporotic vertebral compression fractures (OVCFs) based on postoperative computed tomography (CT). Methods A total 2344 patients who underwent PVP PKP due OVCFs in our spine center were analyzed retrospectively. According detection CT, divided into two groups: group (PCE group) non-pulmonary (NPCE...

To conduct radiologic anatomical study on the relation between S1 sacroiliac screws' entry points and route of pelvic outer superior gluteal artery branches with aim to provide basis technical reference for avoidance damage during horizontal screw placement.Superior CTA (CT angiography) vascular imaging 74 healthy adults (37 women 37 men) was done 128-slice spiral CT (computed tomography). The attendant-measuring software used portray "safe bony entrance area" (hereinafter referred as "Safe...

The proliferation and migration of Schwann cells contribute to axonal outgrowth functional recovery after peripheral nerve injury. Previously, several microRNAs were abnormally expressed injury they played important roles in regeneration. However, the role underlying mechanism miR-34a remain largely unknown. levels contactin-2 (CNTN2) detected by quantitative real-time PCR. 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyl-tetrazolium bromide transwell assays used examine cell migration,...

The present study aimed to evaluate the clinical efficacy of bilateral pedicle cement anchoring technique combined with postural reduction in percutaneous vertebroplasty (PVP) for Kümmell disease. For this purpose, a retrospective was performed on 18 patients disease who between January 2018 and June 2021 underwent PVP. Pre‑ post‑operative bone mineral density, injected volume, visual analogue scale (VAS) values, Oswestry disability index (ODI) scores, Cobb angle measurements anterior...

Abstract Background To compare the mechanical characteristics of a percutaneous superior pubic intramedullary screw, bridging plate and screw-rod system anterior ring for treatment unilateral vertical fractures to provide reference clinical application. Methods A finite element model pelvic injury (unilateral fracture) was produced. The were fixed with their combinations in 5 types models. fracture stabilities under vertical, bilateral anterior-posterior load quantified compared based on...

Bromodomain-containing protein 4 (BRD4) plays an important role in gene transcription a variety of diseases, including inflammation and cancer. However, the mechanism by which BRD4 inhibitors bind selectively to its bromodomain 1 (BRD4-BD1) 2 (BRD4-BD2) remains unclear. Studying interaction between will provide new ideas for drug development disease treatment. To explore molecular selective binding three novel phenoxypyridone Cpd11, Cpd14, Cpd23 BRD4-BD1 BRD4-BD2, respectively, docking,...

This paper presents transient-flow component models for the prediction of transient response gas turbine cycles. The application is to predict a small solar-powered regenerative gas-turbine engine with centrifugal impellers. sizes are similar those under consideration Space Station, but can easily be generalized other applications axial or mixed-flow turbomachinery. New propagation arbitrary transients in impellers developed. These coupled heat exchangers, receiver and radiator. based on...

Instantaneous-response and transient-flow component models for the prediction of transient response gas turbine cycles are presented. The based on applications principles conservation mass, energy, momentum. coupled to simulate system thermodynamic behavior, used predict a closed-cycle regenerative Brayton cycle. Various transients simulated using: instantaneous-response turbomachinery with heat-exchanger models; models. sizes comparable those solar-powered Space Station (radial...

To compare the breakage risk of lengthened sacroiliac screws and ordinary to treat unilateral vertical sacral fractures provide a reference for clinical application.A finite element model Tile C pelvic ring injury (unilateral type Denis II fracture sacrum) was produced. The were fixed with screw in 6 types models. maximal von Mises stresses stress distributions two kinds when standing on both feet measured compared.The less than that screw. Compared screw, distribution more homogeneous.The...

Ischemic preconditioning or postconditioning has been shown to have neuroprotective effect on cerebral ischemia, but it not studied in peripheral nerve injury. In this study, a rat model of sciatic transection was established, and subjected three cycles ischemia for 10 minutes + reperfusion minutes, once day. After ischemic postconditioning, serum insulin-like growth factor 1 expression increased; Schwann cell myelination sensory function motor were restored. These findings indicate that can...

This paper presents instantaneous-response and transient-flow component models for the prediction of transient response gas turbine cycles. The are based on applications principles conservation mass, energy, momentum. coupled to simulate system thermodynamic behavior, used predict a closed-cycle regenerative Brayton cycle. Various transients simulated using: turbomachinery with heat-exchanger models; models. sizes comparable those under consideration solar-powered Space Station (radial...

Objective To compare the biomechanical characteristics of lengthened sacroiliac screw and long fixated in different ways for treatment central vertical sacral fractures to provide reference clinical practice. Methods A finite element model with three dimensions Tile type C pelvic ring injury (central Denis III fracture sacrum) was produced. The were or 7 types models respectively as follows.(1)One S1 segment from right (C1); (2) One S2 (C2); (3)Two screws segments (C12); (4) one left...

To analyze the effectiveness and safety of zoledronic acid combined with chemotherapy for lung cancer spinal metastases, 96 patients metastases were averagely classified into experimental group (gemcitabine, cisplatin, acid) control (gemcitabine cisplatin). An optimized noise variance estimation algorithm (OMAPB) was proposed based on maximum a posteriori Bayesian method (MAPB), applied to patient’s computed tomography (CT) scan. The results indicated that in terms curative effect, number...

Objective To compare the mechanical characteristics of lengthened and conventional sacroiliac screws for fixation unilateral vertical sacral fracture so as to provide evidences clinic practice.Methods A three-dimensional finite element model Tile type C pelvic injury (unilateral sacrum) was developed.Six different methods internal with were performed.Stability posterior ring during stance phase maximum stress on after measured compared.Results Mobilization one screw at S1 or S2...

Objective To provide the anatomical basis for avoiding damage to superior gluteal artery in sacroiliac screw placement horizontally, by means of radiologic anatomy study on relationship between first sacral vertebral(S1) screws' entry points and pelvic outer branches. Methods Seventy-four CTA vascular images adults (37 women 37 men) were done with 128-slice spiral CT. The CT attendant measuring software was used portray thesafe bony entrance area(short forsafe area) S1 segment...