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Quantum information science is a new interdisciplinary subject,which has unique performance in the field of information.It can break through the limits of the existing classical information systems in the aspects of improving computing speed,ensuring information security,increasing information capacity and improving detection accuracy.Grover algorithm is a typical quantum algorithm,which can realize quadratic acceleration for any classical brute force exhaustive search problem,further promoting the development of quantum computing.How to effectively improve and apply Grover algorithm has become an important research field of quantum computing.This paper summarizes the optimization,improvement and application of Grover algorithm,summarizes the application and improvement of Grover algorithm in different fields,and discusses some research directions of future algorithm improvement and related applications of Grover algorithm.

The present study aimed to analyze the data of embedded intrauterine device (IUD) in the bladder wall with the additional presence of calculus. This case series study included 11 female patients with partially or completely embedded IUD in the bladder wall. Their median age was 34 (range, 32–39) years. The median duration of IUD placement was 36 (range, 24–60) months. The median duration of symptoms was 9 (range, 3–12) months. Six patients underwent laparoscopy: the operation duration was 129 (range, 114–162) min, blood loss was 15 (range, 10–25) mL, the hospital stay was 4 (range, 4–4.5) days, the visual analog scale (VAS) for pain at 6 h after surgery was 3 (range, 2–6), and the time to removal of the urethral catheter was 7 (range, 7–8) days. Five patients underwent open surgery: the operation duration was 126 (range, 96–192) min, blood loss was 30 (range, 20–50) mL, the hospital stay was 7 (range, 7–15) days, the VAS was 6 (range, 4–9) at 6 h after surgery, and the time to removal of the urethral catheter was 9 (range, 8–17) days. The IUD and bladder stones were successfully removed in all 11 (100%) patients.

This study was completed to evaluate the relationship between tumor length and the prognosis of patients with pathological stage IA-IC esophageal adenocarcinoma (EAC). Patients were identified from the Surveillance, Epidemiology, and End Results Program database (United States, 2006–2015). X-tile software and ROC analysis were mainly used to explore the best threshold of tumor length for dividing patients into different groups, and then propensity score matching (PSM) was used to balance other variables between groups. The primary outcome assessed was overall survival (OS). A total of 762 patients were identified, and 500 patients were left after PSM. Twenty millimeters were used as the threshold of tumor length. Patients with longer tumor lengths showed worse OS (median: 93 vs. 128 months; P  = 0.006). Multivariable Cox regression analysis showed that longer tumor length was an independent risk factor (hazard ratio 1.512, 95% confidence interval, 1.158–1.974, P  = 0.002). Tumor length has an impact on patients with pathological stage IA-IC EAC who undergo surgery alone. The prognostic value of the pathological stage group may be improved after combining it with tumor length and age. [ABSTRACT FROM AUTHOR]

Carbon nanotubes and their composite thermoelectric (TE) materials have significant advantages in supplying power to flexible electronics due to their high electrical conductivity, excellent flexibility, and facile preparation technology. In this work, stable n-type silver ammonia-polyethyleneimine/single-walled carbon nanotube ([Ag(NH3)2]+-PEI/SWCNT) composite films were facilely prepared by solution blending and vacuum-filtration methods. The results demonstrate that light silver ammonia doping optimizes the carrier concentration and carrier mobility of the composite film, and a maximum power factor (PF) of [Ag(NH3)2]+-PEI/SWCNT of 91.9 μW m−1 K−2 was obtained, which is higher than that of PEI/SWCNT (70.0 μW m−1 K−2). Furthermore, when the composite films were reduced by the NaBH4 solution, the Seebeck coefficient and the PF value were further increased to −45.5 μV K−1 and 115.8 μW m−1 K−2, respectively. For demonstration, a maximum output voltage of 13.8 mV and output power of 492 nW were achieved using a three p–n junction-based TE device constructed by [Ag(NH3)2]+-PEI/SWCNT at a temperature difference of 50 K. Thus, this study provides a metal complex ion doping strategy to improve thermoelectrical properties and air stability of the PEI/SWCNT composite films, which have potential applications in flexible electronics. [ABSTRACT FROM AUTHOR]