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高效、准确的水质监测对海洋资源开发具有重要意义，自治式潜水器（AUV）在海洋环境监测中有广阔的应用前景。针对单个 AUV 执行面向海洋标量场估计的水质采样任务时存在的效率低、可靠性差、覆盖率不足和定位准确性差等问题，提出了一种基于多AUV的协同定位与自适应采样系统。系统中每个AUV定期向队友广播自己收集到的采样数据，并根据接收到的队友数据，基于扩展卡尔曼滤波器进行自定位矫正。根据收集到的采样数据，AUV 以高斯过程建模环境标量场，使用差分进化路径规划器在线规划后续采样路径。仿真结果表明，所提方案有效降低了多AUV系统的定位误差，提升了对环境标量场的估计精度。

褪黑素具有显著抗衰老作用,其主要机制包括自由基清除和线粒体保护，褪黑素水平的下降可能是人体衰老的表现。此外，研究证实褪黑素具有降脂、降压和减重作用，可预防和延缓动脉粥样硬化进展，改善脑缺血再灌注损伤，在缺血性卒中领域具有良好的应用前景。本文对褪黑素抗衰老、预防卒中相关危险因素和改善卒中预后等方面的作用机制和应用前景进行总结。 Abstract: Melatonin has significant anti-aging effect, and the main action mechanisms includes free radical scavenging and mitochondrial protection. The decline of melatonin level may be the manifestation of human aging. In addition, it has been confirmed that melatonin has the effect of lipid-lowering, antihypertension and weight-loss, which can prevent and delay the progression of atherosclerosis, and reduce ischemia-reperfusion injury, so melatonin has a good application prospect in the field of ischemic stroke. This article summarized the mechanism and application prospect of melatonin in anti-aging, preventing stroke related risk factors and improving stroke prognosis.

基于互补氧化物半导体（CMOS）相机卷帘快门效应的可见光通信系统比特速率越高,拍摄的图片中每个比特对应的像素列数越少,且像素灰度值波动加剧,严重影响数据解调性能。针对这一问题,文章提出采用全局和局部两个动态阈值判决结合分段降采样的解调算法,首先由图片中全部待解调列的灰度值拟合得到全局动态阈值,判决后检测出所有数据帧头位置,然后根据各帧对应列的灰度值分别拟合出局部阈值,最后对各帧判决结果分段降采样恢复原始比特序列。实验结果表明,当相机卷帘快门的列扫描频率为103.68 kHz时,能正确解调的最小比特分辨率为2.962,对应的最大比特速率和有效数据速率分别为35和10.8 kbit/s。

目的 评估脑心共患疾病在共治与分治两种模式下的卫生经济学效益，以确定更优的医疗策略，提高治疗效率与经济效益。 方法 本研究采用回顾性分析方法，收集2019年1月—2023年12月在首都医科大学附属北京天坛医院心血管内科、神经内科、神经外科、心血管外科和介入放射科等治疗的，符合中国疾病诊断相关分组（Chinese diagnosis related groups，CN-DRG）中神经系统疾病及功能障碍合并循环系统疾病及功能障碍患者的病历资料，记录患者的人口学特征、总住院天数、各类医疗费用以及病例组合指数（case mix index，CMI）和权重（relative weight，RW）。将患者分为共治组（一次住院期间对患者的脑心共患疾病进行统筹规划和综合治疗）与分治组（不同住院期间分别进行神经系统和心血管系统疾病的治疗），比较两组的基线特点及总住院天数、费用等经济学指标。 结果 共纳入442例患者数据。共治组总住院天数低于分治组（6 d vs. 14 d，P

文章主要介绍时分同步码分多址（TD-SCDMA）网络Iu接口光信号采集板卡的研究现状和基本原理。通过与传统采集卡的对比分析,提出一种改进的采集板卡的设计方案,并对采集板卡硬件系统的各组成部分进行了简要的分析和介绍。最后对硬件调试的基本原理作了概括。

Copyright of World Regional Studies is the property of World Regional Studies 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 Micronanoelectronic Technology is the property of Micronanoelectronic 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 Bulletin of the Chinese Ceramic Society is the property of Bulletin of the Chinese Ceramic Society 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 Shipin Kexue/ Food Science is the property of Food Science 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 Atomic & Molecular Physics (1000-0364) is the property of Journal of Atomic & Molecular Physics 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 Food & Fermentation Industries is the property of Food & Fermentation Industries 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 Shipin Kexue/ Food Science is the property of Food Science 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.)

Molecular weight distribution (MWD) is a key characterization parameter of polymers and has crucial impact on the properties of polymers. The MWD regulation of polypeptoids, an attractive class of biomaterials, has not been reported so far. This study designed and synthesized the photolabile dormant initiator, 2-nitro-4,5-dimethoxybenzylcyclohexylaminecarbamate, for the ring-opening polymerization of N-butyl-N-carboxyanhydride (BuN-NCA). Upon the ultraviolet (UV) light irradiation (360 nm), the photolabile dormant initiator could release the active cyclohexylamine. The release amount was well controlled by manipulating the duration of the applied radiation. The release amount of cyclohexylamine was increased as the time of UV irradiation increased from 1 h to 4 h, resulting in the Mn decrease of the polypeptoid (from 9.6×10³ to 4.6×10³). The release rate of cyclohexylamine was controlled by the intervals of the applied UV irradiation. The early released cyclohexylamine initiated the monomer to form longer chains while the lately released cyclohexylamine initiated the monomer to form shorter chains. Thus, the MWDs of polypeptoids were well regulated in situ. This study provides the possibility to tune the Mn and MWD of polypeptoids in a more precise manner, and also lays the foundation for the investigation of the relationship between the MWD and the properties of polypeptoids. [ABSTRACT FROM AUTHOR]

Rice is a pioneer crop in the amelioration of sodic/saline–sodic soils. Compared with the rice yield in such alkaline salt-affected soils, less attention has been paid to the rice grain quality, although its demand is gradually increasing. Here, we reviewed the four patterns of rice grain quality: grain processing, appearance, nutrition, and sensory taste, in sodic/saline–sodic soils mainly characterized by the soil salts NaHCO3 and Na2CO3. The roles played by the amelioration of sodic/saline-sodic soils, rice cultivars, and rice cultivation in the grain quality were also discussed to further clarify the effects of the sodic / saline-sodic soils on rice grain quality. Generally, the lower head milled rate, milled rice rate, brown rice rate, and amylose content are often observed with a higher chalky grain rate, chalkiness degree, and protein content under the conditions of sodic/saline sodic soils. Interestingly, such advantages of rice grain quality as higher protein content with higher nutritional value, higher content of metal ions such as sodium in brown rice, lower translucent particles, and lower starch content are identified in such alkaline salt-affected soils. Future studies need to explore the grain quality formation, the new germplasm resources, and synergistic improvement of rice yield and grain quality to enhance rice grain quality in the conditions of alkaline sodic/ saline-sodic soils. [ABSTRACT FROM AUTHOR]

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Copyright of New Building Materials / Xinxing Jianzhu Cailiao is the property of New Building Materials 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.)

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Copyright of Acta Petrologica et Mineralogica / Yanshi Kuangwuxue Zazhi is the property of Acta Petrologica et Mineralogica 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 Nanjing Agricultural University / Nanjuing Nongye Daxue Xuebao is the property of Journal of Nanjing Agricultural University 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 create nomogram prediction and random survival forest models for patients with isocitric dehydrogenase(IDH)wild-type glioblastoma to estimate their survival probabilities. Methods The clinical data of 127 patients diagnosed with IDH wild-type glioblastoma at Xijing Hospital Affiliated to Air Force Military Medical University from January 2017 to December 2020 were analyzed retrospectively. Prognostic factor analysis was conducted and a column chart model and a random survival forest model were established. The discrimination, calibration, and clinical net benefit rate of the model were evaluated through the C-index, calibration curve, and decision curve. Results Multivariate analysis using Cox proportional hazards model revealed that patients had preoperative Karnofsky performance scale (KPS), acceptance of concurrent radiotherapy and chemotherapy, age, the expression of O6-methylguanine-DNA methyltransferase (MGMT) protein were an independent prognostic factor(P＜0. 05). The nomogram prediction model was developed using Cox regression, while the random survival forest model was established via the software R. Both models demonstrated excellent discrimination and calibration, with the random survival forests exhibiting a superior clinical net benefit compared to nomograms. Conclusion The established column chart model and random survival forest model help clinical doctors determine the survival probability of patients at specific time points. [ABSTRACT FROM AUTHOR]

In order to solve the problems of high communication overhead and lack of reward and punishment mechanism of practical Byzantine fault tolerant (PBFT) consensus algorithm, an improved PBFT consensus algorithm RPBFT (reputed practical Byzantine fault tolerance) based on reputation mechanism was proposed. Firstly, a reputation mechanism is introduced to score nodes, and the nodes participating in consensus are divided into collector nodes and ordinary consensus nodes, and malicious nodes are punished. Secondly, the collector node is responsible for collecting the voting messages of ordinary consensus nodes to avoid communication between ordinary consensus nodes, thereby reducing communication overhead. Finally, when none of the Byzantine nodes in the ordinary consensus nodes have malicious behavior, the number of votes required for collection is increased, and the number of votes required for collection is reduced, so as to achieve fast consensus. Experimental results show that RPBFT can effectively detect and punish malicious nodes, and has lower communication overhead, average consensus delay and higher consensus throughput. When the total number of nodes is 37, RPBFT reduces the average consensus delay by more than 25.2% and increases the consensus throughput by more than 39% compared with SBFT. [ABSTRACT FROM AUTHOR]

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Copyright of Chinese Journal of Clinical Healthcare is the property of Chinese Journal of Clinical Healthcare 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.)

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Copyright of Journal of Mine Automation is the property of Industry & Mine Automation 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.)

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Copyright of World Nuclear Geoscience is the property of World Nuclear Geoscience 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.)

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Copyright of Food & Fermentation Industries is the property of Food & Fermentation Industries 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 & Fermentation Industries is the property of Food & Fermentation Industries 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 Science & Technology of Food Industry is the property of Science & Technology of Food Industry 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.)

Objective To investigate the mechanism of bis (2-ethylhexyl) phthalate (DEHP) in inducing cholestasis and liver injury in mice. Methods In the in vivo experiment, adult female ICR mice were randomly divided into control group (corn oil)and DEHP group (200 mg/kg/d), and a model of cholestasis was established by intragastric administration for 4 weeks. After blood and liver tissue samples were collected from all mice, a biochemical analyzer was used to measure the level of total bile acid (TBA) in serum and the liver, and a microplate reader was used to measure alkaline phosphatase (ALP) and gamma-glutamyl transpeptidase (GGT): HE staining was used to observe the pathological changes of the liver；RT-PCR was used to measure the mRNA expression levels of the inflammatory factors interleukin-1β (IL-1β), interleukin-6 (IL-6), and tumor necrosis factor-α (TNF-α) in the liver: liquid chromatography/triple quadrupole mass spectrometry was used to measure the bile acid profile in the liver of mice. In the in vitro experiment, AML-12 mouse hepatocytes were cultured and treated with DEHP (250 µmol/L), DCA (125 µmol/L), and CDCA (125 µmol/L) for 24 hours, and RT-PCR was used to measure the mRNA expression levels of the inflammatory cytokines IL-1β, IL-6, and TNF- α. The independent-samples t test was used for comparison of continuous data between two groups: a one-way analysis of variance was used for comparison between multiple groups, and the LSD-t test was used for further comparison between two groups. Results The in vivo experiment showed that compared with the control group, the DEHP group had significant increases in the serum levels of TBA, ALP, and GGT and the level of TBA in the liver (the t values are respectively −4.396, −5.109, −8.504, −3.792 and −7.974, all P<0.05). Compared with the control group, the DEHP group had significant increases in cholic acid, chenodeoxycholic acid, taurocholic acid, deoxycholic acid, and ursodeoxycholic acid (the t values are respectively −2.802, −3.177, −2.633, −2.874 and −2.311, all P<0.05). HE staining of the liver showed that the mice in the DEHP group had enlargement of the portal area, bile duct deformation, inflammatory cell infiltration around the bile duct, and significant increases in the mRNA expression levels of the inflammatory factors IL-1β, IL-6, and TNF-α in the liver (the t values are respectively − 2.539, − 2.823 and − 4.636, all P<0.05). The in vitro experiment showed that the actual difference in hepatocyte viability after 0-1 000 µmol/L DEHP treatment does not exceed 15%, but there were significant increases in the mRNA expression levels of the inflammatory cytokines IL-1β, IL-6, and TNF-α after treatment with DEHP at different concentrations of 125 µmol/L, 250 µmol/L, and 500 µmol/L (all P<0.05). Compared with DEHP stimulation alone, the combined stimulation of CDCA and DEHP upregulates the cytokine in hepatocyte IL-1β mRNA levels (P<0.01): the combined stimulation of DCA and DEHP can significantly increase the cytokine in hepatocyte IL-1β and IL-6 mRNA levels (all P<0.01). Conclusion DEHP exposure can cause cholestasis and induce liver inflammation in mice, possibly by promoting the production of toxic bile acids and the secretion of inflammatory factors. [ABSTRACT FROM AUTHOR]

Objective: Correlation between changes in intestinal flora and macrophage polarization in colorectal cancer mice analyzed by macrogene sequencing. Methods: 3-week-old APCmin/+ mice and wild-type C57/6J mice were divided into colorectal cancer group (CRC group, n=8) and normal control group (NC group, n=7), which were given high-fat diet fed for 8 weeks, collect feces and analysis of intestinal flora changes by macrogenetic sequencing, Immunohistochemical (IHC) detect M2 macrophage polarization in tumor tissue. Results: HE pathology shows successful modeling in CRC group mice, significantly more tumors than NC group (P<0.05). The α-diversity showed that CRC group flora diversity higher than NC group, flora richness no significant difference; diversity showed clear separation of the flora between two groups. The Venn diagram demonstrated a total of 1,620 species between the two groups, with 109 species endemic to the NC group and 191 species endemic to the CRC group respectively. At the phylum level, the CRC and NC groups were dominated by the Firmicutes (74.04% vs. 87.56%) and the Bacteroidota (20.33% vs. 6.42%); at the species level, Metastats analysis showed that the species of Clostridioides difficile_A, Duncaniella freteri, Parabacteroides merdae, and Odoribacter splanchnicus were significantly different between the two groups (P<0.05); KEGG functional analysis shows that in the CRC group Ribosome, Glycolysis, Gluconeogenesis, Oxidative phosphorylation pathway were significantly enriched in the CRC group; Neuroactiveligand receptorinteraction, Human T_cellleukemiavirus1infection, Cholesterol metabolism pathway were significantly enriched in the NC group; immunohistochemical analyses showed that M2 macrophage CD206 content was higher in the CRC, Pearson correlation analyses showed that abundance of Odoribacter splanchnicus was positively correlated to the CD206 (r=0.7799). Conclusion: Significant changes and functional differences in the intestinal flora of colorectal cancer mice, there may be a correlation between the differential flora and macrophage polarization. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Oil Crop Sciences is the property of Oil Crops Research Institute of Chinese Academy of Agricultural Sciences 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.)