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分组化和宽带化是下一代城域网络发展的趋势,但在向IP城域网络发展的过程中,时分复用（TDM）和IP业务将长期共存。文章介绍了移动城域传送网的定位和需求,分析了目前常见的运营商骨干网桥接（PBB）、运营商骨干网传输（PBT）和传送多协议标签交换（TMPLS）等分组传送网（PTN）技术,在此基础上探讨了PTN设备的组网方案和时分同步码分多址（TD-SCDMA）基站同步的解决方案。

Copyright of Arid Land Geography is the property of Chinese Academy of Sciences, Xinjiang Institute of Ecology & Geography and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Vibration, Measurement & Diagnosis is the property of Nanjing Hangkong Daxue and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Engineering Management & Technology Discussion is the property of Omniscient Pte. Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Engineering Management & Technology Discussion is the property of Omniscient Pte. Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Yellow River is the property of Editorial Board of Yellow River and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective: To explore the value of echocardiography combined with serum microRNA-122 (miR-122) in evaluating left ventricular function changes caused by essential hypertension (EH). Methods: 58 EH patients admitted to our hospital from January 2020 to June 2022 were selected as the study group, and 62 healthy persons in the same period were selected as the control group. All subjects were examined by echocardiography and serum miR-122. The differences of quantitative parameters of echocardiography and serum miR-122 levels between the two groups were compared, and the correlation between serum miR-122 and left ventricular function indexes was analyzed. The optimal diagnostic threshold of the quantitative parameters of echocardiography, serum miR-122 alone for to diagnose left ventricular function changes caused by EH, as well as the corresponding sensitivity and specificity were analyzed by drawing the receiver operating characteristic curve (ROC) and calculating the area under the curve (AUC). The joint diagnosis uses multivariate logistic regression analysis and draws ROC curves to evaluate its diagnostic efficacy. Results: In the study group, left ventricular end diastolic diameter (LVEDD), left ventricular end systolic diameter (LVESD), interventricular septum end diastolic thickness (IVSD), left ventricular posterior wall end diastolic thickness (LVPWD), the ratio of E to the mean value of the early diastolic velocity of the mitral annulus at the interventricular septum and side wall, e ’interventricular septum and e’ side wall (E/e ’), left ventricular end diastolic volume (EDV) and left ventricular end systolic volume (ESV), serum miR-122 level was significantly higher than the control group (P＜0. 05),and the ratio of early diastolic blood flow velocity E to late diastolic blood flow velocity A (E/A) was significantly lower than the control group (P＜0. 05). However,there was no statistically significant difference in left ventricular ejection fraction (EF) between the two groups (P＞0. 05). The serum miR-122 level was positively correlated with LVEDD, LVESD, EDV, and ESV (P＜0. 05), but not significantly correlated with other quantitative parameters of echocardiography IVSD, LVPWD, EF, E/A, E/e’ (P＜0. 05). Compared with individual diagnosis,the combination of quantitative parameters of echocardiography and serum miR-122 has the highest AUC, Jordan index, sensitivity,and specificity in diagnosing left ventricular function changes caused by EH (P＜0. 05). Conclusion: Echocardiography combined with serum miR-122 can accurately evaluate the changes of left ventricular function caused by EH, which is helpful to guide the selection of clinical treatment plan. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Contemporary Pediatrics is the property of Xiangya Medical Periodical Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to determine the water resources carrying capacity of the Yellow River diversion area in Henan Province, three criteria layers of water resources, ecological environment and economic society were built. A TOPSIS model based on the combination of AHP and EWM weights was used to evaluate the comprehensive water resources carrying capacity of the area from 2010 to 2021. The results show that from 2010 to 2021, the water resources carrying capacity of the Yellow River diversion area in Henan Province shows an upward trend, but the overall level of water resources carrying capacity is relatively lower, most of them are level III (critical), but they have not reached level I（bearable); In 2021, the water supply modulus has the greatest impact on the carrying capacity of water resources in the water diversion areas of Henan Province, while the urban sewage treatment rate has the smallest impact; From the perspective of water resources and ecological environment standards, there is still a lot of room for improvement in the water resources carrying capacity of the region, which can be improved by increasing water resources management efforts and strengthening water-saving publicity. [ABSTRACT FROM AUTHOR]

Copyright of Automobile Technology is the property of Automobile Technology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Ecology & Rural Environment is the property of Journal of Ecology & Rural Environment Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Computer Engineering & Applications is the property of Beijing Journal of Computer Engineering & Applications Journal Co Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food & Machinery is the property of Food & Machinery Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Kunming Medical University / Kunming Yike Daxue Xuebao is the property of Kunming Medical Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Brewing is the property of China Brewing Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Kunming Medical University / Kunming Yike Daxue Xuebao is the property of Kunming Medical Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Pesticide Science / Nongyaoxue Xuebao is the property of Chinese Journal of Pesticide Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective To investigate the expression changes of miR-338-3p and β-1，3-N-acetylglucosaminotrans‑ ferase 3（B3GNT3）in the pancreatic cancer tissues and their significance. Methods Ninety-two cases of pancreatic cancer patients underwent laparoscopic resection were selected. The tumor tissues and their adjacent tissues（≥5 cm from the edge of tumor tissues）were collected intraoperatively，and the expression levels of miR-338-3p and B3GNT3 mRNA in the tissues were detected by real-time quantitative PCR. Pearson correlation was used to analyze the correlation between the miR-338-3p and B3GNT3 mRNA and the clinicopathological characteristics of patients. The 3-year survival rate of the patients was statistically analyzed，and the relationship between miR-338-3p and B3GNT3 mRNA expression and the survival of pancreatic cancer patients was analyzed. Cox regression was used to analyze the risk factors for survival in pancreatic cancer patients. Results Compared with the adjacent tissues，the expression of miR-338-3p was lower and the expression of B3GNT3 mRNA was higher in the pancreatic cancer tissues（all P<0. 05）. The expression of miR-338-3p was negatively correlated with the expression of B3GNT3 mRNA in pancreatic cancer tissues（r=-0. 571，P<0. 05）. MiR-338-3p in pancreatic cancer patients with emerging diabetes，low and moderate differentiation，TNM stage Ⅲ stage，and lymph node metastasis was lower than that of patients with no emerging diabetes，high differentiation，TNM Ⅰ-Ⅱstage，and no lymph node metastasis（all P<0. 05）. The expression of B3GNT3 mRNA in patients with low and moderate differentiation，TNM stage Ⅲ and lymph node metastasis was higher than that in patients with high differentiation，TNMⅠ-Ⅱstage and no lymph node metastasis （all P<0. 05）. According to the mean relative expression levels of miR-338-3p and B3GNT3 mRNA，the patients were divided into the high miR-338-3p expression group，the low miR-338-3p expression group，the high B3GNT3 mRNA expression group and the low B3GNT3 mRNA expression group. The 3-year survival rate of the group with low miR-338-3p expression was lower than that of the group with high miR-338-3p expression，and that of the group with low B3GNT3 mRNA expression was higher than that of the group with high B3GNT3 mRNA expression（all P<0. 05）. Lymph node metastasis，low expression of miR-338-3p and high expression of B3GNT3 mRNA were risk factors for death 3 years after surgery in pancreatic cancer patients（all P<0. 05）. Conclusion The low expression of miR-338- 3p and high expression of B3GNT3 mRNA in pancreatic cancer tissues are related to the malignant biological behavior and poor prognosis of pancreatic cancer. [ABSTRACT FROM AUTHOR]

Extensive soil erosion and vegetation degradation are common in karst rocky desertified area, and presenting a serious challenge of restoration of degraded habitats. In order to explore the promoting effect of PGPR(plant growth promoting rhizobacteria)on the growth of afforestation seedlings, seedlings of Cinnamomum camphora, Zenia insignis, Camptotheca acuminata and Acacia confusa which are common in Guangxi rocky desertified region were used as experimental materials. The plate dilution method was used to screen nitrogen-fixing bacteria from rhizosphere soil of rocky desertification native plants. The strains with higher nitrogenase activities were selected and inoculated into experimental seedlings for pot experiment. The results were as follows: Six strains of nitrogen-fixing bacteria from rhizosphere soil were obtained, and the 16S rDNA sequence analysis showed that the tested strains belong to Rhizobium, Sinorhizobium and Flavobacterium. Among them, the nitrogenase activity of three strains of Rhizobium was the highest. Pot experiment showed that inoculating nitrogen fixing bacteria could promote the growth of afforestation seedlings. Plant height, leaf area, leaf dry weight and chlorophyll content increased significantly compared to control. Nitrogen content of Cinnamomum camphora, Zenia insignis, Camptotheca acuminate and Acacia confusa seedlings significantly increased by 28.9%, 53.1%, 37.0% and 31.6%, respectively. Phosphorus contents of Cinnamomum camphora and Acacia confusa was increased significantly by 25.6% and 42.5%, respectively, while the potassium contents of Zenia insignis and Acacia confusa was increased significantly by 57.5% and 49.7%, respectively. The nitrogen-fixing bacterial strains of karst rocky decertified areas in Guangxi have growth promoting effect on local tree seedings used for afforestation. They provide a strong potential for forest restoration through seedling inoculation. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Natural Disasters is the property of Gai Kan Bian Wei Hui and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

[Objective] To screen the suitable fertilization model for flax production in Ulanqab City, Inner Mongolia and provide scientific basis for flax high-efficient cultivation in Ulanqab City. [Methods] Eight kinds of compound fertilizers with different content of NPK were selected and randomized block design was used to explore the effects of different content of NPK on vield and related traits in flax. [Results] Proper fertilization was helpful to im we the emergence rate of flax. The emergence rate and the vield related character of Laisiweite was the highest: three kinds of compound fertilizers. Batian, Laisiweite and Lianmeng significantly increased the flax yield. [Conclusion] Comprehensive analysis showed that the content of NPK in the compound fertilizer of Laisiweite was suitable for flax production in Ulanqah City. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Forest & Environment is the property of Journal of Forest & Environment Editorial and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Computer Engineering & Applications is the property of Beijing Journal of Computer Engineering & Applications Journal Co Ltd. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Food Safety & Quality is the property of Journal of Food Safety & Quality Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Kunming Medical University / Kunming Yike Daxue Xuebao is the property of Kunming Medical Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Harbin University of Science & Technology is the property of Journal of Harbin University of Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Tropical Medicine is the property of China Tropical Medicine Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Oil Drilling & Production Technology / Shiyou Zuancai Gongyi is the property of Shiyou Zuancai Gongyi Bianjibu and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective To explore the applicable value of serum tumor necrosis factor-α(TNF-α) and interleukin-6(IL-6)levels on the liver function assessment in the patients with sepsis. Methods Totally 83 cases of sepsis complicating liver function abnormality in the emergency department of our two hospitals from July 2013 to July 2015 were selected as the research subjects and divided into the mild group(26 cases),moderate group(30 cases) and severe group(27 cases) according to the liver function abnormality degree. Other contemporaneous 30 individuals undergoing the healthy physical examinations were selected as the control group. The serum TNF-α and IL-6 levels were detected in each group and its relationship with the liver function was analyzed. Results Compared with control group,the TNF-α and IL-6 levels in various sepsis groups were significantly increased with statistical difference(P0.05);with the liver function abnormality aggravation,the serum TNF-α and IL-6 levels were progressively elevated,which had statistical difference among the mild,moderate and severe groups(P0.05);serum TNF-α and IL-6 levels in the sepsis patients with liver function abnormality had positive correlation with serum ALT,AST and TBIL(P0.05),and no correlation with ALB(P0.05). Conclusion Serum TNF-α and IL-6 levels are closely correlated with the degree of liver function abnormality,which can be used as the indicators for assessing the liver function. [ABSTRACT FROM AUTHOR]