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Enhanced performance based on cross-layer design from physical to transport layers for multihop wireless networks

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The Journal of China Universities of Posts and Telecommunications 2010年第5期17卷 87-92页

作者： CHEN Guang-quan song Mei ZHANG Yong song jun-de School of Computer Science and Technology Beijing University of Posts and Telecommunications Beijing 100876 China School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

This paper puts forward a novel cognitive cross-layer design algorithms for multihop wireless networks optimization across physical,mediam access control （MAC）,network and transport *** is well known,the conventional layered-protocol architecture can not provide optimal performance for wireless networks,and cross-layer design is becoming increasingly important for improving the performance of wireless *** this study,we formulate a specific network utility maximization （NUM） problem that we believe is appropriate for multihop wireless *** using the dual algorithm,the NUM problem has been optimal decomposed and solved with a novel distributed cross-layer design algorithm from physical to transport *** solution enjoys the benefits of cross-layer optimization while maintaining the simplicity and modularity of the traditional layered *** proposed cross-layer design can guarantee the end-to-end goals of data flows while fully utilizing network *** simulations have evaluated an enhanced performance of the proposed algorithm at both average source rate and network ***,the proposed algorithm has low implementation complexity for practical reality.

关键词： multihop wireless networks cross-layer design optimization distributed algorithm

Preparation of a novel PAN/cellulose acetate-Ag based activated carbon nanofiber and its adsorption performance for low-concentration SO_2

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International Journal of Minerals,Metallurgy and Materials 2015年第4期22卷 437-445页

作者： Yan-bo Wu jun Bi Ting Lou Tie-ben song Hong-quan Yu School of Environmental and Chemical Engineering Dalian Jiaotong University

Polyacrylonitrile （PAN）, PAN/cellulose acetate （CA）, and PAN/CA-Ag based activated carbon nanofiber （ACNF） were prepared using electrostatic spinning and further heat treatment. Thermogravimetrylifferential scanning calorimetry （TG-DSC） analysis indicated that the addition of CA or Ag did not have a significant impact on the thermal decomposition of PAN materials but the yields of fibers could be improved. Scanning electron microscopy （SEM） analysis showed that the micromorphologies of produced fibers were greatly influenced by the viscosity and conductivity of precursor solutions. Fourier transform infrared spectroscopy （FT-IR） analysis proved that a cyclized or trapezoidal structure could form and the carbon scaffold composed of C=C bonds appeared in the PAN-based ACNFs. The characteristic dif- fraction peaks in X-ray diffraction （XRD） spectra were the evidence of a turbostratic structure and silver existed in the PAN/CA-Ag based ACNF. Brurmer-Emmett-Teller （BET） analysis showed that the doping of CA and Ag increased surface area and micropore volume of fi- bers; particularly, PAN/CA-Ag based ACNF exhibited the best porosity feature. Furthermore, SO2 adsorption experiments indicated that all the three fibers had good adsorption effects on lower concentrations of SO2 at room temperature; especially, the PAN/CA-Ag based ACNF showed the best adsorption performance, and it may be one of the most promising adsorbents used in the fields of chemical industry and en- vironment protection.

关键词： activated carbon nanofibers polyacrylonitrile electrospinning adsorption sulfur dioxide

Mechanism of action of Linggui Zhugan Decoction in treating non-alcoholic fatty liver disease using untargeted metabolomics approach

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Traditional Medicine Research 2025年第2期10卷 65-76页

作者： Huan Pei Ren-Lin Li Xin-Ran song Qian-Qian Wan Yu-Ming Wang Han-Zhou Li Wei-quan Xu Jia-Bao Liao Wei-Bo Wen Jing Miao Huan-Tian Cui School of Basic Medicine Yunnan University of Chinese MedicineKunming 650599China School Clinical Medical College Yunnan University of Chinese MedicineKunming 650599China First School of Clinical Medicine Yunnan University of Chinese MedicineKunming 650599China School of Integrative Chinese and Western Medicine Tianjin University of Traditional Chinese MedicineTianjin 301617China Department of Pharmacy Tianjin Second People's HospitalTianjin 300192China

Background:Non-alcoholic fatty liver disease(NAFLD)is a liver disorder characterized by the accumulation and degeneration of fat in the liver cells,a condition that may further deteriorate and lead to cirrhosis and liver *** studies showed that metabolic dysfunction can promote NAFLD *** Zhugan Decoction(LGZGD)has therapeutic effects on *** mechanism of LGZGD still remains *** study was to examine the impact of LGZGD on the metabolic processes involved in the development of ***:A mice model of NAFLD was treated with *** therapeutic potential of LGZGD was evaluated by assessing the activity of transaminases,lipids levels of blood,and pathological changes in the liver of the mice model of ***,this study also evaluated the influence of LGZGD on liver inflammation and oxidative ***:The results of untargeted metabolomics analysis showed that LGZGD reduced the disordered lipid metabolism in NAFLD *** improved the oxidative stress and also reduced the levels of pro-inflammatory cytokines in the *** metabolomics analysis of liver samples revealed that LGZGD treatment improved metabolic disorders,including alanine,aspartate,glutamate,glycerophospholipid metabolism,and citrate *** RT-qPCR and Western blot results showed that LGZGD could regulate the expression of key enzymes in the metabolic pathway of the citrate cycle,including ATP-citrate lyase(ACLY),alanine-glyoxylate aminotransferase-2(AGXT2),phosphatidylethanolamine N-methyltransferase(PEMT),and succinate dehydrogenase(SDH).Conclusion:We found that LGZGD can treat NAFLD by reducing inflammatory responses,inhibiting oxidative stress,regulating alanine,aspartate,glutamate,and glycerophospholipid metabolism,and citrate cycle pathways.

关键词： NAFLD LGZGD untargeted metabolomics glycerophospholipid metabolism citrate cycle

经皮入路与经肌间隙椎弓根钉治疗胸腰椎骨折的临床疗效分析

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中外医药研究 2023年第4期2卷 25-27页

作者：高启龙谭莹全俊松张欣铭陈建琨昆明市中医医院云南昆明650011 云南省药物研究所云南昆明650011

目的:比较经皮入路与经肌间隙椎弓根钉治疗胸腰椎骨折的临床疗效。方法:回顾性分析2016年6月—2020年3月昆明市中医医院收治的采用椎弓根钉治疗的96例患者胸腰椎骨折的临床资料,根据入路方式不同分为经皮组(52例)与经肌间隙组(44例)。... 详细信息

目的:比较经皮入路与经肌间隙椎弓根钉治疗胸腰椎骨折的临床疗效。方法:回顾性分析2016年6月—2020年3月昆明市中医医院收治的采用椎弓根钉治疗的96例患者胸腰椎骨折的临床资料,根据入路方式不同分为经皮组(52例)与经肌间隙组(44例)。经肌间隙组选用经肌间隙椎弓根钉棒系统固定治疗,经皮组选用经皮椎弓根钉棒系统固定治疗。比较两组手术指标、疼痛视觉模拟量表(VAS)评分及治疗优良率。结果:经皮组术中出血量少于经肌间隙组,住院费用高于经肌间隙组,差异有统计学意义(P0.05)。结论:经皮入路及经肌间隙治疗无神经损伤的胸腰椎骨折,疗效相当,不考虑经济的情况下,首选经皮椎弓根钉棒系统固定治疗。

关键词：经皮入路经肌间隙入路椎弓根钉胸腰椎骨折

东海北部哈氏仿对虾的种群动态及其最高持续渔获量

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水产学报 2000年第4期24卷 364-369页

作者：李明云倪海儿竺俊全宋海棠俞存根宁波大学海洋与水产系!浙江宁波315211 浙江省海洋水产研究所资源研究室!浙江舟山316100

哈氏仿对虾是东海北部主要的拖虾渔业对象。在雌性的体长组成中 ,70～ 90mm的个体占优势 ,占总数的6 3%。应用ELEFANⅠ和ELEFANⅡ技术对哈氏仿对虾每月的体长资料进行分析 ,结果表明 :生长参数K =1.7,极限体长L∞ =12 8mm ,自然死亡系数... 详细信息

哈氏仿对虾是东海北部主要的拖虾渔业对象。在雌性的体长组成中 ,70～ 90mm的个体占优势 ,占总数的6 3%。应用ELEFANⅠ和ELEFANⅡ技术对哈氏仿对虾每月的体长资料进行分析 ,结果表明 :生长参数K =1.7,极限体长L∞ =12 8mm ,自然死亡系数M =2 .742 7,总死亡系数Z =8.32 3 ,利用率E =6 7.0 6 % ,极限年龄为 1.32 34岁 ,选择体长为 5 9.6 7mm ,补充类型为二季补充型。通过单位补充量产量Y/R和单位补充量产值Yv/R分析表明 ,该群体的利用已到了相当充分的水平 ,若保持现有的捕捞水平 ,把开捕体长增大至 70mm时 ,单位补充量产量可增加 1.77% ,产值可增加 10 .78%。但若捕捞死亡水平继续增加 ,产量几乎不再增加 ,而产值却明显下降。

关键词：哈氏仿对虾种群动态最高持续渔获量

Buyanghuanwu decoction promotes angiogenesis after cerebral ischemia/reperfusion injury：mechanisms of brain tissue repair

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Neural Regeneration Research 2016年第3期11卷 435-440页

作者： Zhen-qiang Zhang jun-ying song Ya-quan Jia Yun-ke Zhang Henan University of Traditional Chinese Medicine Zhengzhou Henan Province China First Affiliated Hospital of Henan University of Traditional Chinese Medicine Zhengzhou Henan Province China

Buyanghuanwu decoction has been shown to protect against cerebral ischemia/reperfusion injury,but the underlying mechanisms remain *** this study,rats were intragastrically given Buyanghuanwu decoction,15 m L/kg,for 3 days.A rat model of cerebral ischemia/reperfusion injury was established by middle cerebral artery *** rats administered Buyanghuanwu decoction,infarct volume was reduced,serum vascular endothelial growth factor and integrin αvβ3 levels were increased,and brain tissue vascular endothelial growth factor and CD34 expression levels were increased compared with untreated *** effects of Buyanghuanwu decoction were partially suppressed by an angiogenesis inhibitor（administered through the lateral ventricle for 7 consecutive days）.These data suggest that Buyanghuanwu decoction promotes angiogenesis,improves cerebral circulation,and enhances brain tissue repair after cerebral ischemia/reperfusion injury.

关键词： nerve regeneration Buyanghuanwu decoction cerebral ischemia/reperfusion injury ischemic cerebrovascular disease integrin αvβ3 vascular endothelial growth factor angiogenesis CD34 neural regeneration

Species and Organ Diversity in the Effects of Hydrogen Peroxide on Superoxide Dismutase Activity In Vitro

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Journal of Integrative Plant Biology 2006年第6期48卷 672-678页

作者： Hong-Yan Cheng song-quan song Xishuangbanna Tropical Botanical Garden the Chinese Academy of Sciences Mengla Yunnan 666303 China Institute of Botany the Chinese Academy of Sciences Beijing 100093 China

Superoxlde dlsmutase （SOD） is ubiquitous in aerobic organisms and constitutes the first link In the enzyme scavenging system of reactive oxygen species. In the present study, species and organ diversity of SOD activity In a solution and In an in-gel assay system, as well as the effects of hydrogen peroxide （H202） on SOD activity, were Investigated. In a solution assay system, SOD activity of jackfruIt root, shoot, leaves, axes, and cotyledons, of maize embryos and endosperms, of mung bean leaves and seeds, of sacred lotus axes and cotyledons, and of rice and wheat leaves was Increased by 1-15 mmol/L H2O2. However, SOD activity In rice root and seeds, maize roots and leaves, mung bean roots and shoots, and wheat seeds was decreased by 1-15 mmol/L H2O2. The SOD activity of wheat root and soybean roots, leaves, axes, and cotyledons was Increased by 1-4 mmol/L H2O2, but was decreased by concentrations of H2O2 〉4 mmol/L. The SOD activity of soybean shoots was not affected by 1-15 mmol/L H2O2. The SOD activity In crude mltochondrla of jackfruIt, maize, and upas seeds, as well as In purified mitochondria of jackfruIt, was also Increased by 1-15 mmol/L H2O2. In the In-gel assay system, the SOD In jackfruIt cotyledons was comprised of Mn-SOD, Cu/Zn-SOD, and Fe-SOD, the crude mltochondria of jackfruit seeds and maizes embryo was comprised of Mn-SOD and Cu/ Zn-SOD, and the crude mltochondria of maize seeds was comprised of Mn-SOD only. In the present study, H2O2 markedly Inhibited Cu/Zn-SOD and Fe-SOD activity.

关键词： hydrogen peroxide inhibitor informative in-gel assay system solution assay system species and organ diversity superoxide dismutase activity.

Possible Involvement of Reactive Oxygen Species Scavenging Enzymes in Desiccation Sensitivity of Antiaris toxicaria Seeds and Axes

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Journal of Integrative Plant Biology 2008年第12期50卷 1549-1556页

作者： Hong-Yan Cheng song-quan song Institute of Botany the Chinese Academy of Sciences Beijing 100093 China

The relationships among desiccation sensitivities of Antiaris toxicaria seeds and axes, changes in activities of superoxide dismutase （SOD）, ascorbate peroxidase （APX）, catalase （CAT）, glutathione reductase （GR） and dehydroascorbate reductase, （DHAR）, production rate of superoxide radical （.O2^-）, and the contents of hydrogen peroxide （H2O2） and thiobarbituric acid （TBA）-reactive substance were studied. Desiccation tolerance of seeds and axes decreased with dehydration. Desiccation tolerance of axes was higher than that of seeds, and that of epicotyls was higher than radicles. Activities of SOD, CAT and DHAR of seeds increased during the initial phase of dehydration, and then decreased with further dehydration, whereas activities of APX and GR decreased with dehydration. These five enzyme activities of axes, however, increased during the initial phase of dehydration, and then decreased with further dehydration. The rate of superoxide radical production, and the contents of H2O2 and TBA-reacUve products of seeds and axes gradually increased with dehydration. These results show that the A. toxicaria seed is a typical recalcitrant seed. Loss of desiccation tolerance in seeds and axes was correlated with the increase in .O2- production rate, content of H2O2 and TBA-reactive products, and the decline of antioxidant enzyme activities of seeds and axes.

关键词： Antiaris toxicaria antioxidant enzyme content of H2O2 and thiobarbituric acid-reactive product O2^- production rate recalcitrant seed.

Response to temperature stress of reactive oxygen species scavenging enzymes in the cross-tolerance of barley seed germination

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2010年第12期11卷 965-972页

作者： Yu-qin MEI song-quan song Institute of Botany Chinese Academy of Sciences Beijing 100093 China

A number of studies have shown the existence of cross-tolerance in plants, but the physiological mechanism is poorly understood. In this study, we used the germination of barley seeds as a system to investigate the cross-tolerance of low-temperature pretreatment to high-temperature stress and the possible involvement of reactive oxygen species （ROS） scavenging enzymes in the cross-tolerance. After pretreatment at 0 ℃ for different periods of time, barley seeds were germinated at 35 ℃, and the content of malondialdehyde （MDA） and the activities of ROS scavenging enzymes were measured by a spectrophotometer analysis. The results showed that barley seed germinated very poorly at 35 ℃, and this inhibitive effect could be overcome by pretreatment at 0 ℃. The MDA content varied, depending on the temperature at which seeds germinated, while barley seeds pretreated at 0 ℃ did not change the MDA content. Compared with seeds germinated directly at 35 ℃, the seeds pretreated first at 0 ℃ and then germinated at 35 ℃ had markedly increased activities of superoxide dismutase （SOD）, ascorbate peroxidase （APX）, catalase （CAT）, and glutathione reductase （GR）. The SOD and APX activities of seeds germinated at 35 ℃ after 0 ℃-pretreatment were even substantially higher than those at 25 ℃, and GR activity was similar to that at 25 ℃, at which the highest germination performance of barley seeds was achieved. These results indicate that low-temperature pretreatment can markedly increase the tolerance of barley seed to high temperature during germination, this being related to the increase in ROS scavenging enzyme activity. This may provide a new method for increasing seed germination under stress environments, and may be an excellent model system for the study of cross-tolerance.

关键词： Barley seed Cross-tolerance Germination/growth Reactive oxygen species (ROS) scavenging enzyme,Pretreatment at low temperature Temperature stress