State-of-Health Prediction of Lithium-Ion Batteries Based on Diffusion Model with Transfer Learning

An accurate state-of-health (SOH) prediction of lithium-ion batteries (LIBs) is crucial to their safe and reliable. Although recently the data-driven methods have drawn great attention, owe to its efficient deep learning, it is worthwhile to continue devoting many efforts to prediction performance. In practice, fast charging mode has been widely applied in battery replenishing, which poses challenges for SOH prediction due to the diversity of charging conditions and electrochemical properties of LIBs; although, the process is stable and detectable. Furthermore, most previous data-driven prediction methods based discriminative model cannot describe the whole picture of the problem though sample data, affecting robustness of model in real-life applications. In this study, it is presented a SOH prediction model based on diffusion model, as an efficient new family of deep generative model, with time series information tackled through Bi-LSTM and the features derived from the voltage profiles in multi-stage charging process, which can identify distribution characteristics of training data accurately. The model is further refined by means of transfer learning, by adding a featured transformation from the base model for SOH prediction of different type LIBs. Two different types of LIBs datasets are used to evaluate the proposed model and the verified results revealed its better performance than those of other methods, reducing efforts required to collect data cycles of new battery types with the generality and robustness

Similarity metric for XML documents

Since XML documents can be represented as trees, Based on traditional tree edit distance, this paper presents structural similarity metric for XML documents,which is based on edge constraint, path constraint, and inclusive path constraint, and similarity metric based on machine learning with node costs. It extends scope for searching XML documents, and improves recall and precision for searching XML documents.

Y-type partial duplication of a vaginal ectopic ureter with ipsilateral hypoplastic pelvic kidney and bicornuate uterus

We present a case of vaginal ectopic ureter with ipsilateral partial duplication of the upper ureter (Y-type ureter), ipsilateral hypoplastic pelvic kidney and bicornuate uterus in a 20-year-old woman, who presented with mild urinary incontinence since infancy. Ultrasonography, computed tomography and intravenous pyelography examination showed a left kidney with no evidence of a right kidney. Cystourethroscopy showed absence of the right hemitrigone. Magnetic resonance (MR) urography demonstrated the presence of a bicornuate uterus, an ectopic dysplastic right kidney in the pelvic cavity, and a right ureter that terminated in the fornix vaginae. The patient underwent right nephroureterectomy, and urinary continence was restored completely. Although congenital malformations of the urinary tract are frequently associated with genital tract abnormalities, this is, to the best of our knowledge, the first report of the coexistence of these anomalies in an individual. Our report also highlights the importance of MR urography in the diagnosis of such rare and complex anomalies

High- vs Low-power Holmium Laser Lithotripsy: A Prospective, Randomized Study in Patients Undergoing Multitract Minipercutaneous Nephrolithotomy

OBJECTIVE To determine the efficacy and safety of high-power holmium: yttrium aluminum-garnet (Ho: YAG) laser lithotripsy for multitract modified minimally invasive percutaneous nephrolithotomy (MPCNL) in the treatment of patients with large staghorn renal calculi. METHODS A randomized, prospective study was conducted. Two-hundred seventy-three consecutive patients (291 renal units) with large staghorn renal calculi were randomized to undergo multitract MPCNL with 30-W low-power or 70-W high-power Ho: YAG laser lithotripsy. Both groups were compared in terms of perioperative findings and postoperative outcomes, including procedure time, stone-free rate, length of hospital stay, transfusion rates, renal function recovery, and other complications. RESULTS The average patient age was 49.2 years (range 22-73) and mean stone size was 5.54 +/- 0.7 cm. The 2 groups had some comparable perioperative findings and outcome, including tracts required per operated renal unit (n), blood loss, postoperative fever, postoperative hospital stay, stone-free rate, and improvement of operated renal function. The operation time in the high-power group was significantly shorter than that in the low-power group (129.20 +/- 17.2 vs 105.18 +/- 14.2, P <.01). CONCLUSION A combination of multitract MPCNL and high-power Ho: YAG laser lithotripsy can greatly decrease the operative time without increasing the intraoperative complications or delaying postoperative renal function recovery when compared with low-power Ho: YAG laser lithotripsy. UROLOGY 79: 293-297, 2012. (C) 2012 Elsevier Inc

Electrosurgical Enucleation Versus Bipolar Transurethral Resection for Prostates Larger than 70 ml: A Prospective, Randomized Trial with 5-Year Followup

Purpose: We compared the perioperative and postoperative characteristics of prostate PlasmaKinetic (TM) enucleation and bipolar transurethral resection for large volume benign prostatic hyperplasia. Materials and Methods: In this prospective, randomized, controlled trial 80 patients with benign prostatic hyperplasia and a prostate of larger than 70 ml were randomly assigned to prostate bipolar transurethral resection or PlasmaKinetic enucleation. Operative time, resected adenoma weight, changes in hemoglobin, catheterization time and postoperative hospital stay were recorded and compared. Patients were followed 1, 6, 12, 24, 36, 48 and 60 months after surgery. Results: Greater resected prostate weight (mean +/- SD 64.2 +/- 19.0 vs 50.6 +/- 20.0 gm, p = 0.03), less blood loss (mean 0.87 +/- 0.42 vs 1.74 +/- 0.63 gm, p < 0.01), and shorter catheterization time (mean 35.5 +/- 5.8 vs 60.1 +/- 5.8 hours, p < 0.01) and postoperative hospital stay (mean 3.2 +/- 0.9 vs 4.4 +/- 1.1 days, p < 0.01) were recorded in the enucleation group than in the resection group. The postoperative improvement in International Prostate Symptom Score, quality of life, maximal flow rate and post-void residual urine volume was similar in the 2 groups at 1, 6, 12 and 24 months but significantly better in the enucleation group at 36, 48 and 60 months. During the 5-year followup no patient in the enucleation group but 2 in the resection group experienced recurrence. Conclusions: For large volume benign prostatic hyperplasia PlasmaKinetic enucleation of the prostate is associated with less blood loss, shorter hospital stay and catheterization time than bipolar transurethral resection of the prostate. Moreover, PlasmaKinetic enucleation seems to be superior at long-term followup with fewer reoperations necessary

Power Batteries Health Monitoring: A Magnetic Imaging Method Based on Magnetoelectric Sensors

With the popularity of electric vehicles, the ever-increasing demand for high-capacity batteries highlights the need for monitoring the health status of batteries. In this article, we proposed a magnetic imaging technique (MIT) to investigate the health status of power batteries nondestructively. This technique is based on a magnetic sensor array, which consists of a 16-channel high-performance magnetoelectric sensor, and the noise equivalent magnetic induction (NEB) of each channel reaches 3–5 pT/Hz1/2@10 Hz. The distribution of the magnetic field is imaged by scanning the magnetic field variation of different positions on the surface. Therefore, the areas of magnetic anomalies are identified by distinguishing different magnetic field abnormal results. and it may be possible to classify the battery failure, so as to put forward suggestions on the use of the battery. This magnetic imaging method expands the application field of this high-performance magnetoelectric sensor and contributes to the battery’s safety monitoring. Meanwhile, it may also act as an important role in other nondestructive testing fields

Biomechanical analysis of a newly developed shape memory alloy hook in a transforaminal lumbar interbody fusion (TLIF) in vitro model.

The objective of this biomechanical study was to evaluate the stability provided by a newly developed shape memory alloy hook (SMAH) in a cadaveric transforaminal lumbar interbody fusion (TLIF) model.Six human cadaveric spines (L1-S2) were tested in an in vitro flexibility experiment by applying pure moments of ±8 Nm in flexion/extension, left/right lateral bending, and left/right axial rotation. After intact testing, a TLIF was performed at L4-5. Each specimen was tested for the following constructs: unilateral SMAH (USMAH); bilateral SMAH (BSMAH); unilateral pedicle screws and rods (UPS); and bilateral pedicle screws and rods (BPS). The L3-L4, L4-L5, and L5-S1 range of motion (ROM) were recorded by a Motion Analysis System.Compared to the other constructs, the BPS provided the most stability. The UPS significantly reduced the ROM in extension/flexion and lateral bending; the BSMAH significantly reduced the ROM in extension/flexion, lateral bending, and axial rotation; and the USMAH significantly reduced the ROM in flexion and left lateral bending compared with the intact spine (p<0.05). The USMAH slightly reduced the ROM in extension, right lateral bending and axial rotation (p>0.05). Stability provided by the USMAH compared with the UPS was not significantly different. ROMs of adjacent segments increased in all fixed constructs (p>0.05).Bilateral SMAH fixation can achieve immediate stability after L4-5 TLIF in vitro. Further studies are required to determine whether the SMAH can achieve fusion in vivo and alleviate adjacent segment degeneration

Range of motion at L5-S1.

<p>Abbreviations: F, flexion; E, extension; LLB, left lateral bending; RLB, right lateral bending; LR, left rotation; RR, right rotation. USMAH, unilateral shape memory alloy hook; BSMAH, bilateral shape memory alloy hook; UPS, unilateral pedicle screws and rods; BPS, bilateral pedicle screws and rods.</p

Surgical constructs.

<p>1. Transforaminal lumbar interbody fusion (TLIF) with unilateral shape memory alloy hook (USMAH) at L4-5; 2. TLIF with bilateral shape memory alloy hook (BSMAH) at L4-5; 3. TLIF with unilateral pedicle screws and rods (UPS) at L4-5; 4. TLIF with bilateral pedicle screws and rods (BPS) at L4-5.</p