检索结果-南通市图书馆

Chinese Medical Journal 2022年第19期135卷 2380-2382页

作者： Yuhao Sun Xiaoyu Wen Zhuoxian Li Lijing Xu Meng Xia School of Basic Medicine Guangxi University of Chinese MedicineNanningGuangxi 530200China.

To the Editor:Vascular dementia(VD)is a clinical disease characterized_by cognitive dysfunction and intellectual decline caused byvarious cerebrovascularfactors.The high incidence of VD in middle-aged and elderly people has become a major medical and social problem worldwide.li Since its specific pathogenesis has not been fully elucidated,clinical practice is stillfocused on improving cognition and sAylmteprntoamtivaetilcy,t rweiathtm heignht,seuffcehc taivse pnierascse atanmd faenwd sdidoen eepffeezcitl.s2,i traditional Chinese medicine has drawn medical attention and become a hotspot in the medical research field.

关键词： decoction clinical pathogenesis

Oxalic acid cross-linked sodium alginate and carboxymethyl chitosan hydrogel membrane for separation of dye/NaCl at high NaCl concentration

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2022年第4期33卷 1951-1955页

作者： Wenbin Xie Kongyin Zhao Lijing Xu Ningning Gao Hui Zhao Zelong Gong Linan Yu Jun Jiang State Key Laboratory of Separation Membranes and Membrane Processes/National Centre for International Joint Research on Separation Membranes Tiangong UniversityTianjin 300387China SINOPEC Research Institute of Petroleum Processing Beijing 100083China

Dye desalination is a challenge in the treatment of textile wastewater with high salt concentration. It is imperative to develop salt resistance membrane that is from sustainable materials to effectively treat dye/salt mixtures. And most polymer membrane materials are non-renewable petrochemical resources.In this paper, a green hydrogel membrane(CMCS-OA-Na Alg) was prepared by non-metallic ions of oxalic acid(OA) cross-linking of two natural macromolecules of sodium alginate(Na Alg) and carboxymethyl chitosan(CMCS). The membrane showed excellent anti-swelling at high salt concentration(swelling rate less than 8.0% in 10.0 wt% Na Cl solution) and good anti-fouling performance. The membrane exhibited a rejection higher than 95.0% for dyes(bright blue, direct black, direct red, and Congo red) and lower than7.0% for Na Cl, which can achieve better dye/Na Cl separation performance. This study provides a promising membrane material for high salt textile wastewater treatment only using water and carbohydrates as raw materials without any organic solvents.

关键词： Hydrogel filtration membranes Oxalic acid Sodium alginate High salt wastewater Salt resistance

Ecological impacts of the expansion of offshore wind farms on trophic level species of marine food chain

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2024年第5期139卷 226-244页

作者： lijing Wang Bangguo Wang Wenxi Cen Rui xu Yuwei Huang Xin Zhang Yinghui Han Yuanxun Zhang College of Resources and Environment University of Chinese Academy of SciencesBeijing 101408China Yanshan Earth Critical Zone and Surface Fluxes Research Station University of Chinese Academy of SciencesBeijing 101408China Chinese Research Academy of Environmental Sciences Beijing 100012China National Joint Research Center for Yangtze River Conservation Beijing 100012China College of Environmental Engineering Beijing University of TechnologyBeijing 100124China Institute of Eco-Environmental Forensics Shandong UniversityQingdao 266237China

The global demand for renewable energy has resulted in a rapid expansion of offshore wind farms(OWFs)and increased attention to the ecological impacts of OWFs on the marine ecosystem.Previous reviews mainly focused on the OWFs’impacts on individual species like birds,bats,or mammals.This review collected numerous field-measured data and simulated results to summarize the ecological impacts on phytoplankton,zooplankton,zoobenthos,fishes,and mammals from each trophic level and also analyze their interactions in the marine food chain.Phytoplankton and zooplankton are positively or adversely affected by the‘wave effect’,‘shading effect’,oxygen depletion and predation pressure,leading to a ±10% fluctuation of primary production.Although zoobenthos are threatened transiently by habitat destruction with a reduction of around 60% in biomass in the construction stage,their abundance exhibited an over 90% increase,dominated by sessile species,due to the‘reef effect’in the operation stage.Marine fishes and mammals are to endure the interferences of noise and electromagnetic,but they are also aggregated around OWFs by the‘reef effect’and‘reserve effect’.Furthermore,the complexity of marine ecosystem would increase with a promotion of the total system biomass by 40% through trophic cascade effects strengthen and resource partitioning alternation triggered by the proliferation of filter-feeders.The suitable site selection,long-term monitoring,and life-cycle-assessment of ecological impacts of OWFs that are lacking in current literature have been described in this review,as well as the carbon emission and deposition.

关键词： Offshore wind farms(OWFs) Ecological impacts Plankton Benthos Fish Mammal

Ba^(2+)/Ca^(2+)co-crosslinked alginate hydrogel filtration membrane with high strength,high flux and stability for dye/salt separation

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第5期35卷 320-324页

作者： Ningning Gao Yue Zhang Zhenhao Yang Lijing Xu Kongyin Zhao Qingping Xin Junkui Gao Junjun Shi Jin Zhong Huiguo Wang SINOPEC Research Institute of Petroleum Processing CO. LTD.Beijing 100083China State Key Laboratory of Separation Membranes and Membrane Processes/National Centre for International Joint Research on Separation Membranes Tiangong UniversityTianjin 300387China

Alginate is a natural polysaccharide polymer.Hydrogel filtration membranes prepared from alginate show excellent fouling resistance and controllable separation performance,but poor mechanical properties limit the use of algae hydrogels.In this study,Ba^(2+)/Ca^(2+)co-crosslinked alginate(Ba/CaAlg)hydrogel membrane was prepared by cross-linking sodium alginate with a blend aqueous solution of barium ions and calcium ions,and the membrane was applied to the separation of dyes/salts from dyeing wastewater.Compared with the CaAlg membrane,the Ba/CaAlg hydrogel membrane exhibited more stable structure,and the mechanical properties and salt tolerance of the membrane were significantly improved.The flux of Ba/CaAlg membrane for methyl blue/sodium chloride mixed solution reached 43.5 L m^(−2) h^(−1),which was significantly higher than that of CaAlg membrane.Besides,the Ba/CaAlg membrane showed higher dye rejection(>99.6%)and lower salt rejection(<8.2%).The structure of Ba/CaAlg membrane was preliminarily simulated by molecular dynamics,and the pore size and distribution of the membrane were calculated.The Ba/CaAlg membrane has a broad application prospect in dyes/salts separation.

关键词： Alginate Filtration membrane Ba^(2+)/Ca^(2+)ion crosslinking Dye/salt separation Molecular dynamic simulation Hydrogel

Analysis of Changing Characteristics of Evaporation in Cangzhou City in Recent 40 Years

在线全文

学校读者我要写书评

暂无评论

Meteorological and Environmental Research 2013年第10期4卷 6-8页

作者： Haichuan Li Lijing Xu Cangzhou Meteorological Bureau of Hebei Province

[Objective] The study aimed to analyze the changing characteristics of evaporation in Cangzhou City in recent 40 years.[Method] Based the observation data of evaporation measured by small evaporation pans （with the caliber of 20 cm） from weather stations of Cangzhou dur- ing 1971 -2010, the monthly, seasonal, annual and decadal variation of evaporation were analyzed using conventional assessment methods. [Result] During 1971 -2010, monthly average evaporation in Cangzhou fluctuated within a year, and the maximum value appeared in June, while the minimum value appeared in January. Within a year, average evaporation was the highest in summer, and its variation was the greatest; it was the lowest and varied most slightly in winter. During 1971 -2010, evaporation in winter showed an increasing trend, while evaporation showed a de- creasing trend in spring and autumn, and there was no obvious change in evaporation in summer. Annual average evaporation in Cangzhou showed a decreasing trend from 1971 to 2010, and the highest evaporation reached 2 273.3 ram, appearing in 1972. The lowest evaporation was only 1 681.4 mm, appearing in 1990, and the difference between them reached 591.9 mm. Average evaporation in each decade showed a decrease trend, and the maximum value appeared in the 1980s （1 958.6 mm）, while the minimum value appeared in the first ten years of the 21st century （1 880.9 mm）. [ Conclusion] The research could provide theoretical references for studies on climate change in Cangzhou in future.

关键词： Cangzhou Evaporation Change characteristics China

Contrastive Analysis of the Observation Data of Pressure and Temperature in Qingxian Weather Station

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Meteorological and Environmental Research 2013年第9期4卷 11-14页

作者： Lijing Xu Haichuan Li Cangzhou Meteorological Bureau in Hebei Province

[Objective] The research aimed to contrast parallel observation data of pressure and temperature in Qingxian station. [Method] By u- sing pressure and temperature observed by automatic station and artificial station in Qingxian from January of 2009 to December of 2010, compara- tive analysis of observation data was conducted, and formation reason of difference value was discussed. E Resultl Monthly average pressure differ- ence between automatic station and artificial observation value was from -0.7 to 0.1 hPa. Difference value of monthly average maximum pressure was from -0.5 to 0.4 hPa, while difference value of monthly average minimum pressure was from -0.7 to 0.2 hPa. Difference value of monthly extremely maximum pressure was from -0.3 to 0.6 hPa, while difference value of monthly extremely minimum pressure was from -1.1 to 0.1 hPa. Monthly average temperature difference value was from -2.0 to 0 ℃. Difference value of monthly average maximum temperature was from -0.4 to 0 ℃, while difference value of monthly average minimum temperature was from -0.1 to 0.2 ℃. Difference value of monthly extremely maximum temperature was from -0.3 to 0.3 ℃, while difference value of monthly extremely minimum temperature was from -0.3 to 0.3 ℃. [ Conclusion] Generation reason of observation difference mainly included differences of observation instrument and principle, differences of data collection time and method, different sensor installation positions and environments, manual intervention and observation error.

关键词： Contrastive analysis Pressure Temperature Parallel observation Qingxian China

成本分担机制下共享供应链产品质量水平与及时交货水平最优激励策略

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

管理工程学报 2022年第1期36卷 228-239页

作者：徐琪郭丽晶东华大学旭日工商管理学院上海200051

随着共享经济的迅猛发展,共享供应链应运而生。然而,相较于一般的供应链,共享供应链的运作涉及各成员的资源能力以及供需资源的优化匹配等,其运作更为复杂。特别是在热销季节,即使是共享供需资源,产品的及时交货率也常常难以满足销售商... 详细信息

随着共享经济的迅猛发展,共享供应链应运而生。然而,相较于一般的供应链,共享供应链的运作涉及各成员的资源能力以及供需资源的优化匹配等,其运作更为复杂。特别是在热销季节,即使是共享供需资源,产品的及时交货率也常常难以满足销售商的需求。因此,对于一个由共享工厂、共享平台和零售商构成的共享供应链,本文考虑平台和零售商对共享工厂的产品质量和及时交货率的投入成本予以弱激励和强激励分担两种情况,应用动态微分博弈方法,研究强激励和弱激励成本分担的最优比例,以及共享供应链产品质量水平与及时交货水平的最优投入决策,分析在产品质量水平保障的前提下,不同的成本分担机制对提高共享供应链的及时交货率和利润的影响。结果表明,当目标市场为中低成本的产品时,共享供应链在强激励成本分担机制下整体利润较高,此时可实现工厂产品质量投入努力不变的情况下,及时交货率得以提高;而针对高成本市场,共享供应链在弱激励成本分担机制下整体利润较高。

关键词：产品质量水平及时交货水平微分博弈成本分担机制

O-linked β-N-acetylglucosamine modification and its biological functions

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2015年第12期60卷 1055-1061,I0002页

作者： Yan Liu Shaojun Dai lijing Xing Yunyuan xu Kang Chong Alkali Soil Natural Environmental Science Center NortheastForestry University Key Laboratory of Saline-Alkali VegetationEcology Restoration in Oil Field Ministry of Education Harbin150040 China Key Laboratory of Plant Molecular Physiology Institute ofBotany Chinese Academy of Sciences Beijing 100093 China

到蛋白质的 Ser/Thr 残余的连接 O 的 -N-acetylglucosamine (O-GlcNAc ) 的共有原子价附件在原子核和细胞质充当不仅 posttranslational 修正而且一个营养的传感器，它直接调整基因和多重关键信号 transduction 小径的表示。在 Ser/Thr... 详细信息

到蛋白质的 Ser/Thr 残余的连接 O 的 -N-acetylglucosamine (O-GlcNAc ) 的共有原子价附件在原子核和细胞质充当不仅 posttranslational 修正而且一个营养的传感器，它直接调整基因和多重关键信号 transduction 小径的表示。在 Ser/Thr 残余的动态 O-GlcNAcylation 被二关键酶， O-GlcNAc transferase (OGT ) 和 O-GlcNAcase 催化，它分别地为 O-GlcNAc 修正的增加和移动负责。O-GlcNAc 修正在在动物的细胞的发信号起重要作用，特别在人的疾病。在植物的 OGT 的二 orthologs，敌探并且细长纤弱，被报导了涉及多样的植物过程。然而与在动物揭示的功能的机制相比，蛋白质 O-GlcNAc 的后果在植物的修正大部分是未知的，并且在 O-GlcNAcylation 之间的关系和细胞的过程需要被探索。在这评论，我们在动物在 O-GlcNAc 修正和它的生物功能上总结了最近的进展， O-GlcNAc 的更特殊的功能的植物，和前景将在植物被揭示。

关键词：生物学功能乙酰氨基葡糖胺翻译后修饰改性信号转导通路细胞信号转导营养传感器

Regenerative Braking Strategy for Motor Hoist by Ultracapacitor

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2012年第2期25卷 377-384页

作者： BIAN Yongming ZHU lijing LAN Hao LI Anhu xu Xinming School of Mechanical Engineering Tongji UniversityShanghai 201804China

Rising concern in environmental issues on global scale has made energy saving in powered equipment a very important subject.In order to improve the energy efficiency and driving range of a motor hoist,a regenerative braking system is designed and discussed.The system takes a unique ultracapacitor-only approach to energy storage system.The bi-directional bride DC？DC converter which regulates current flow to and from the ultracapacitor operates in two modes：boost and buck,depending on the direction of the flow.In order to provide constant input and output current at the ultracapacitor,this system uses a double proportional-integral（PI） control strategy in regulating the duty cycle of PWM to the DC？DC converter.The permanent magnet synchronous motor（PWSM） drive system is also studied.The space vector pulse width modulation（SVPWM） technique,along with a two-closed-loop vector control model,is adopted after detailed analysis of PMSM characteristics.The overall model and control strategy for this regenerative braking system is ultimately built and simulated under the MATLAB and Simulink environment.A test platform is built to obtain experimental results.Analysis of the results reveals that more than half of the gravitational potential energy can be recovered by this system.Simulation and experimentation results testify the validity of the double PI control strategy for interface circuit of ultracapacitor and SVPWM strategy for PMSM.

关键词： ultracapacitor regenerative braking strategy DC/DC converter permanent magnet synchronous motor space vector pulse width modulation

Vocal cord mucosal flap for the treatment of acquired anterior laryngeal web

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2014年第7期127卷 1294-1297页

作者： Xiao Yang Wang Jun Han Demin Ma lijing Ye Jingying xu Wen Department of Otolaryngology Head and Neck Surgery Beijing Tongren Hospital Capital Medical University Beijing 100730 China

Background Anterior glottic web is one type of laryngeal stenosis.Previous surgical methods had some drawbacks,such as large surgical trauma,long postoperative recovery time,and multiple-stage surgery.This study aimed to explore better treatment to repair anterior glottis web.Methods We performed vocal cord mucosal flap procedure on 32 patients with anterior laryngeal webs.All subjects received vocal cord scar releasing and vocal cord mucosal flap repair and suture under general anesthesia with selfretaining laryngoscope.Results All 32 patients completed surgery in one stage,without postoperative laryngeal edema,difficulty in breathing,or other complications.After the surgery,the anterior commissure of vocal cords recovered to a decent triangle shape in 28 patients; however,in four patients there were 2 to 3 mm adhesion residuals on the anterior ends of the vocal cords,accompanied by scar appearance of bilateral vocal cords.The GRB score,voice handicap index scores,and maximum phonation time score significantly improved in all patients after the surgery.There was no evidence of recurrent laryngeal webbing in the 6-rnonth follow-up.Conclusion Vocal cords mucosal flap repair surgery has the advantages of less trauma,quick recovery,and significant improvement of the voice in the treatment of laryngeal webs.

关键词： vocal cords microsurgery suture techniques glottic web