With the advancement of wireless communication technology,intelligent antenna technologies such as beam scanning and beamforming have been extensively applied in operators'5G networks,supported by mature technical...With the advancement of wireless communication technology,intelligent antenna technologies such as beam scanning and beamforming have been extensively applied in operators'5G networks,supported by mature technical solutions.However,the unique characteristics of the railway industry—such as the significant spacing between stations covered by wireless private networks,the high speed of train operations,and the necessity for high network reliability—pose elevated requirements for the construction of 5G private networks.An analysis was conducted on the challenges associated with railway 5G private network coverage.The investigation explored the adaptability of smart antenna technologies in various railway scenarios in combination with the principles and advantages of these technologies.This study analyzed the application prospects of smart antenna technologies in railway 5G private networks,taking into account the characteristics of various train operation scenarios.It evaluated the value of these technologies in enhancing the wireless coverage quality of railway 5G private networks in different scenarios.The findings aim to offer new insights and recommendations for the construction and deployment of railway 5G private networks.展开更多
BACKGROUND Serum calcium ion(Ca2+)is an economical and readily available indicator as a routine screening test for hospitalized patients.There are no studies related to serum Ca2+level and digestive tract malignancy.A...BACKGROUND Serum calcium ion(Ca2+)is an economical and readily available indicator as a routine screening test for hospitalized patients.There are no studies related to serum Ca2+level and digestive tract malignancy.AIM To evaluate the effectiveness of serum Ca2+level in predicting the prognosis of patients with colorectal cancer(CRC).METHODS We retrospectively collected the data of 280 patients diagnosed with CRC who underwent radical surgery at the Affiliated Cancer Hospital of Xinjiang Medical University.By analyzing the clinicopathological features,differences between serum Ca2+concentrations on the first day after surgery were determined.We used the receiver operating characteristic curve to assess the predictive ability of serum Ca2+for survival.Survival analyses were performed using the Kaplan-Meier method,and multivariate Cox proportional risk regression was used to determine association between calibration serum Ca2+levels and CRC survival outcomes.RESULTS By receiver operating characteristic curve analysis,the ideal threshold value for Ca2+the first postoperative day and delta serum calcium(δCa2+)value were 1.975 and 0.245,respectively.Overall survival(OS)and progression-free survival(PFS)were better in both the high Ca2+group and highδCa2+group on the first postoperative day.The variables identified through univariate analysis were incorporated into multivariate analysis and showed that tumor differ-entiation(P=0.047),T stage(P=0.019),N stage(P<0.001),nerve vascular invasion(P=0.037),carcinoembryonic antigen(P=0.039),baseline serum Ca2+level(P=0.011),and serum Ca2+level on the first day(P=0.006)were independent predictors of prognosis for patients undergoing feasible radical CRC surgery.Using the findings from the multifactorial analysis,we developed a nomogram and the calibration showed a good predictive ability.CONCLUSION Low serum Ca2+level on the first postoperative day is an independent risk factor for OS and PFS in CRC.展开更多
文摘With the advancement of wireless communication technology,intelligent antenna technologies such as beam scanning and beamforming have been extensively applied in operators'5G networks,supported by mature technical solutions.However,the unique characteristics of the railway industry—such as the significant spacing between stations covered by wireless private networks,the high speed of train operations,and the necessity for high network reliability—pose elevated requirements for the construction of 5G private networks.An analysis was conducted on the challenges associated with railway 5G private network coverage.The investigation explored the adaptability of smart antenna technologies in various railway scenarios in combination with the principles and advantages of these technologies.This study analyzed the application prospects of smart antenna technologies in railway 5G private networks,taking into account the characteristics of various train operation scenarios.It evaluated the value of these technologies in enhancing the wireless coverage quality of railway 5G private networks in different scenarios.The findings aim to offer new insights and recommendations for the construction and deployment of railway 5G private networks.
文摘BACKGROUND Serum calcium ion(Ca2+)is an economical and readily available indicator as a routine screening test for hospitalized patients.There are no studies related to serum Ca2+level and digestive tract malignancy.AIM To evaluate the effectiveness of serum Ca2+level in predicting the prognosis of patients with colorectal cancer(CRC).METHODS We retrospectively collected the data of 280 patients diagnosed with CRC who underwent radical surgery at the Affiliated Cancer Hospital of Xinjiang Medical University.By analyzing the clinicopathological features,differences between serum Ca2+concentrations on the first day after surgery were determined.We used the receiver operating characteristic curve to assess the predictive ability of serum Ca2+for survival.Survival analyses were performed using the Kaplan-Meier method,and multivariate Cox proportional risk regression was used to determine association between calibration serum Ca2+levels and CRC survival outcomes.RESULTS By receiver operating characteristic curve analysis,the ideal threshold value for Ca2+the first postoperative day and delta serum calcium(δCa2+)value were 1.975 and 0.245,respectively.Overall survival(OS)and progression-free survival(PFS)were better in both the high Ca2+group and highδCa2+group on the first postoperative day.The variables identified through univariate analysis were incorporated into multivariate analysis and showed that tumor differ-entiation(P=0.047),T stage(P=0.019),N stage(P<0.001),nerve vascular invasion(P=0.037),carcinoembryonic antigen(P=0.039),baseline serum Ca2+level(P=0.011),and serum Ca2+level on the first day(P=0.006)were independent predictors of prognosis for patients undergoing feasible radical CRC surgery.Using the findings from the multifactorial analysis,we developed a nomogram and the calibration showed a good predictive ability.CONCLUSION Low serum Ca2+level on the first postoperative day is an independent risk factor for OS and PFS in CRC.
