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喀斯特山区筑坝河流水-气界面CO_(2)通量变化特征及影响因素分析

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地球与环境 2024年第1期52卷 11-20页

作者：张富强周忠发孔杰丁圣君王翠谢江婷温朝程邹艳贵州师范大学地理与环境科学学院/喀斯特研究院贵阳550001 贵州喀斯特山地生态环境国家重点实验室培育基地贵阳550001

水库是内陆水域生态系统的重要组成部分,在调节区域和全球碳循环中发挥着重要作用,为了解喀斯特山区筑坝河流水-气界面CO_(2)扩散通量的变化特征及影响因素,本研究以贵州省黔中水利枢纽工程区平寨水库为对象,于2020年1月、5月、7月和11... 详细信息

水库是内陆水域生态系统的重要组成部分,在调节区域和全球碳循环中发挥着重要作用,为了解喀斯特山区筑坝河流水-气界面CO_(2)扩散通量的变化特征及影响因素,本研究以贵州省黔中水利枢纽工程区平寨水库为对象,于2020年1月、5月、7月和11月对其水体理化指标进行系统监测,运用TBL模型法计算水-气界面CO_(2)扩散通量。结果表明,平寨水库水化学类型为HCO_(3)+SO_(4)-Ca型,水化学特征主要受碳酸盐岩风化控制;表层水体pCO_(2)与CO_(2)扩散通量变化范围分别在124.64~558.76μatm和-18.85~15.90 mg/(m^(2)·d)之间,1月表现为大气CO_(2)的源,5月、7月、11月均表现为大气CO_(2)的汇;垂向上水体pCO_(2)变化范围为124.64~5409μatm,表现为表层低、底层高的差异特征。分析认为,影响平寨水库水-气界面CO_(2)扩散通量的因素主要是:碳酸盐岩平衡体系改变了水中碳化物的存在形态使其水体pCO_(2)发生变化、浮游植物光合作用对水体碳化合物的吸收从而抑制CO_(2)向大气扩散,以及水库热分层期时对底层水体CO_(2)暂封存和混合期时底层水体发生上覆脱气的影响。

关键词： CO_(2)扩散通量变化特征影响因素喀斯特水库

Electrochemically-induced highly reactive PdO^(*) interface on modulated mesoporous MOF-derived Co_(3)O_(4) support for selective ethanol electro-oxidation

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Journal of Energy Chemistry 2023年第11期86卷 609-619,I0013页

作者： Yuling chen Yali wen Qun Zhou Lina Shen Fanghui Du Pai Peng Yu chen Junwei Zheng College of Chemistry Chemical Engineering and Materials Science&Collaborative Innovation Center of Suzhou Nano Science and TechnologySoochow UniversitySuzhou 215123JiangsuChina School of Materials Science and Engineering Yancheng Institute of TechnologyYancheng 224051JiangsuChina Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology and School of Chemistry and Chemical Engineering Liaocheng UniversityLiaocheng 252000ShandongChina

Herein,Pd nanoparticles loaded Co_(3)O_(4)catalysts(Pd@Co_(3)O_(4))are constructed from zeolitic imidazolate framework-67(ZIF-67)for the ethanol oxidation reaction(EOR).It is demonstrated for the first time that the electrochemical conversion of Co_(3)O_(4)support would result in the charge distribution alignment at the Pd/Co_(3)O_(4)interface and induce the formation of highly reactive Pd-O species(PdO^(*)),which can further catalyze the consequent reactions of the intermediates of the ethanol *** catalyst,Pd@Co_(3)O_(4)-450,obtained under the optimized conditions exhibits excellent EOR performance with a high mass activity of 590 mA mg-1,prominent operational stability,and extraordinary capability for the electro-oxidation of acetaldehyde ***,the detailed mechanism investigation reveals that Pd@Co_(3)O_(4)-450 could be benefit to the C-C bond cleavage to promote the desirable C1 pathway for the ethanol oxidation *** present strategy based on the metal-support interaction of the catalyst might provide valuable inspiration for the design of high-performing catalysts for the ethanol oxidation reaction.

关键词： ZIF-67 derived Co_(3)0_(4) Reactive PdO^(*)species Mesoporous hollow structure Ethanol electro-oxidation Acetaldehyde electro-oxidation

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山东省水资源生态足迹与用水效率时空测度

河北师范大学学报（自然科学版） 2024年第1期48卷 99-108页

作者：马晓蕾慎潇雯王婕刘雯张曼淮阴师范学院城市与环境学院江苏淮安223300 安阳师范学院资源环境与旅游学院河南安阳455000

采用水生态足迹、生态承载力及盈亏指数,从时空角度分析2000—2018年山东省水生态足迹、万元GDP用水效率随时间演变情况,并对2007,2010,2015和2018年山东省17个地级市水生态足迹和用水效率时空差异进行研究,以揭示山东省水资源利用效率... 详细信息

采用水生态足迹、生态承载力及盈亏指数,从时空角度分析2000—2018年山东省水生态足迹、万元GDP用水效率随时间演变情况,并对2007,2010,2015和2018年山东省17个地级市水生态足迹和用水效率时空差异进行研究,以揭示山东省水资源利用效率及空间分布特征,为水资源优化利用提供参考依据.2000—2018年,山东省水生态足迹呈先升后降趋势,其中农业水生态足迹最高,但呈下降趋势,农业用水效率有所提升;工业用水效率持续高于农业,且处于稳定态势.山东省总体水生态赤字较严重,大多数地区处于水生态亏损状态,济宁市水生态赤字最大.空间上,山东省水生态足迹高值区分布较为稳定,集中分布在山东省西部,且西部地区水生态赤字严重;而沿海城市用水效率较高,水生态赤字相对较低,临沂和烟台2市的水生态承载力较高.各地市万元GDP水生态足迹相差较大,呈西部高、北部低的空间格局.山东省应结合区域实际情况,在农业、工业、生活和生态用水等方面采取相应措施,提高用水效率,促进区域可持续发展.

关键词：水资源生态足迹水资源生态承载力用水效率时空演变

A gradient solid electrolyte interphase with high Li+conductivity induced by bisfluoroacetamide additive for stable lithium metal batteries

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Nano Research 2023年第6期16卷 8425-8432页

作者： Zhaoyang Sun Ziyue wen Yi chen Yue Ma Jinxiang Zhang Yuejiao Li Li Li Renjie chen Beijing Key Laboratory of Environmental Science and Engineering School of Material Science&EngineeringBeijing Institute of TechnologyBeijing 100081China Institute of Advanced Technology Beijing Institute of TechnologyJinan 250300China Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100081China

Stable Li metal anodes have become the driving factor for high-energy-density battery ***,uncontrolled growth of Li dendrite hinders the application of rechargeable Li metal batteries(LMBs).Here,a multifunctional electrolyte additive bisfluoroacetamide(BFA)was proposed to facilitate high-performance *** uniform and dense deposition of Li^(+) was achieved due to the reduced nucleation and plateau overpotential by the addition of ***,X-ray photoelectron spectroscopy(XPS)tests reveal a gradient solid electrolyte interface(SEI)structure on the Li metal *** voltammetry(CV)curves at different sweep speeds prove the formation of pseudocapacitance at the electrode-electrolyte interface,which accelerates the Li+transport rate and protects the electrode *** low activation energy also indicates the ability of rapid Li^(+) transportation in electrolyte ***,the Li||Li symmetric cells with 1.0 wt.%BFA electrolyte exhibit good cycling performance at 0.5 mA·cm^(−2)for over 2000 h,and Li||LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)(NCM622)full cells maintain a high capacity for 200 cycles at 1 C rate.

关键词： electrolytes additives solid electrolyte interphase Li dendrites Li metal batteries

Modified fixation for periprosthetic supracondylar femur fractures:Two case reports and review of the literature

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World Journal of Clinical Cases 2022年第33期10卷 12328-12336页

作者： Qin-wen Li Bin Wu Bo chen Department of Orthopedics The People's Hospital of Three Gorges UniversityThe First People's Hospital of YichangYichang 443000Hubei ProvinceChina

BACKGROUND Periprosthetic supracondylar femoral fractures(PSFs)present a challenge in terms of optimizing fixation in patients with poor bone *** treatment and peri-operative management of PSFs in the elderly remain a burden for orthopedic *** different treatment options,locking plate(LP)and retrograde intramedullary nail(RIMN)have shown favorable ***,reduced mobility and protected weight-bearing are often present in the postoperative older *** a purpose of allowing for early weight-bearing,a modified nail plate combination(NPC)was redesigned for PSF *** SUMMARY In our cases,two elderly osteoporotic female underwent total knee arthroplasty(TKA),and then suffered from low energy trauma onto their knees after falling to the *** radiographs or computed tomography scans demonstrated oblique or transverse PSFs,both of which occurred at the distal femur above *** modified NPC technique was performed for treatment of *** patient was made foot flat weight bearing in 1 *** 6-mo follow-up,the union was ultimately achieved using modified NPC with satisfactory implant *** Neither LP nor RIMN alone may provide adequate support to allow for union in circumstances where the patient has severely osteopenic ***,developing a modified implant offer an alternative choice for treating *** two cases revealed that this technique is a viable option for the geriatric osteoporotic PSFs,offering safe,early weight bearing and favorable clinical outcomes.

关键词： Periprosthetic supracondylar femoral fracture Modified nail plate combination Elderly osteoporotic patient Early weight bearing Case report

虚拟现实前庭康复训练对突发性聋伴眩晕患者的治疗效果:一项随机对照试验

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中国全科医学 2024年第14期27卷 1672-1677,1684页

作者：赵雅楠韩世范李莹周丽媛杨捷吴佳鑫陈钢钢山西医科大学护理学院山西省太原市030001 山西医科大学第一医院耳鼻咽喉头颈外科山西省太原市030001

背景虚拟现实(VR)康复训练凭借其独特的优势,在康复治疗领域已经被广泛应用,但在突发性聋伴眩晕患者中的应用效果缺乏研究。目的观察常规前庭康复训练、VR技术辅助的前庭康复训练在突发性聋伴眩晕患者中的疗效。方法选取2022年1月—2023... 详细信息

背景虚拟现实(VR)康复训练凭借其独特的优势,在康复治疗领域已经被广泛应用,但在突发性聋伴眩晕患者中的应用效果缺乏研究。目的观察常规前庭康复训练、VR技术辅助的前庭康复训练在突发性聋伴眩晕患者中的疗效。方法选取2022年1月—2023年1月山西医科大学第一医院耳鼻咽喉头颈外科收治的突发性聋伴眩晕患者84例,采用随机数字表法将患者分为两组,每组42例。对照组给予药物治疗联合常规前庭康复训练,观察组在药物治疗的基础上予以VR技术辅助的前庭康复训练。干预前及干预后7、14 d,分别使用眩晕残障量表(DHI)和医院焦虑抑郁量表(HADS)对两组进行评估。结果最终81例患者完成试验,其中观察组41例,对照组40例。组别与时间对DHI-功能(F)、DHI-情绪(E)、DHI-躯体(P)评分及DHI总分存在交互作用(P0.05);干预7、14 d后,两组患者DHI各分项评分及其总分均较组内干预前降低(P0.05);干预7、14 d后,两组患者HADS各分项评分及其总分均较组内干预前降低(P0.05)。结论前庭康复训练对突发性聋伴眩晕患者疗效确切,VR技术辅助下的前庭康复训练可更明显改善患者的平衡障碍,提高患者生活质量。

关键词：突发性聋眩晕听力损失,感音神经性前庭康复训练虚拟现实治疗结果

黄河沿线九省区水资源承载力评价及时空变化特征

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地球科学与环境学报 2024年第3期46卷 351-363页

作者：邹宗华赵斌陈洁钱会高燕燕李春燕长安大学水利与环境学院陕西西安710054 长安大学旱区地下水文与生态效应教育部重点实验室陕西西安710054 长安大学水利部旱区生态水文与水安全重点实验室陕西西安710054 陕西省黄河科学研究院陕西西安710054

评估水资源与社会经济、生态环境之间的协调性可为黄河水资源利用和管理提供指导。通过构建基于水资源、社会经济和生态环境3个子系统的水资源承载力评价指标体系,采用VIKOR法对黄河沿线九省区2008~2021年水资源承载力进行评价,并引入Ma... 详细信息

评估水资源与社会经济、生态环境之间的协调性可为黄河水资源利用和管理提供指导。通过构建基于水资源、社会经济和生态环境3个子系统的水资源承载力评价指标体系,采用VIKOR法对黄河沿线九省区2008~2021年水资源承载力进行评价,并引入Mantel检验法分析了水资源承载力类型及其影响因素。结果表明:黄河沿线九省区水资源承载力在2008~2021年呈现持续提升趋势,且随着社会经济发展和生态环境保护的加强,水资源承载力水平在2015年后显著提升;水资源承载力整体上呈现西部强、东部次之、中部弱的空间格局,其中青海最强,宁夏最弱。各省区水资源承载力类型各不相同,青海、甘肃和陕西属于水资源禀赋型,宁夏和内蒙古属于水资源-社会经济型,四川、山西、河南和山东属于综合型。水资源禀赋是黄河沿线九省区水资源承载力的本底,且产水模数、人均水资源量、降雨深是水资源子系统的主控因子,但对社会经济和生态环境子系统依赖度高,需在产业升级、用水效率提高和生态环境保护等方面加强。

关键词：水资源承载力指标体系熵权法 VIKOR法时空动态 Mantel检验黄河

An ILP-Assisted Two-Stage Layout Optimization Method for Satellite Payload Placement

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Space(Science & Technology) 2022年第1期2022卷 85-99页

作者： Xiaoqian chen Xianqi chen Yufeng Xia Weien Zhou wen Yao Defense Innovation Institute Chinese Academy of Military ScienceBeijing 100071China College of Aerospace Science and Engineering National University of Defense TechnologyChangsha 410073China

In the satellite overall design phase,it is a crucial step to perform satellite layout design to guarantee that the aggregation of electronic components can operate normally and stably in an appropriate temperature *** order to handle the satellite payload placement problem of the DongFangHong 4(DFH-4)platform,the heat pipe-constrained component layout optimization(HCLO)problem is proposed with the HCLO model *** careful investigation,it can be divided into two optimization subproblems that can be solved *** on the divide-and-conquer strategy,an integer linear programming-(ILP-)assisted two-stage layout optimization method is *** stage one,component-heat pipe distribution optimization is performed using the ILP technique so that specific heat pipes occupied by each component can be determined and the horizontal movement range of components can be *** stage two,the detailed component layout optimization is investigated to obtain the final positions of ***,the sequence layout sampling(SeqLS)method is used to generate one nonoverlap initial ***,swap operation between components is incorporated to reduce the centroid ***,sequential quadratic programming(SQP)search is conducted based on the generated promising initial layout ***,the SeqLS-based heuristic layout search algorithm is proposed in the second *** layout test cases,including 15 components and 90 components,respectively,are investigated to demonstrate the validity and efficacy of the proposed layout design *** results show that it is promising to apply such a two-stage approach for satellite payload placement in engineering.

关键词： payload optimization programming

不同覆膜方式对白及生长及根际土壤可培养细菌遗传多样性的影响

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西南农业学报 2024年第2期37卷 268-275页

作者：徐歆雅陈晴吴郡颖戴林刚温宇珂齐浩然余秀梅陈强四川农业大学资源学院成都611130

【目的】明确不同地膜覆盖对白及生长及根际土壤可培养细菌遗传多样性的影响,为生物质膜覆盖在白及种植上的应用提供理论支撑。【方法】采用大田试验种植白及,设置不覆膜(CK)、覆盖生物基质膜(BM)、覆盖塑料地膜(PM)3个处理,分别测定田... 详细信息

【目的】明确不同地膜覆盖对白及生长及根际土壤可培养细菌遗传多样性的影响,为生物质膜覆盖在白及种植上的应用提供理论支撑。【方法】采用大田试验种植白及,设置不覆膜(CK)、覆盖生物基质膜(BM)、覆盖塑料地膜(PM)3个处理,分别测定田间杂草去除率、白及农艺性状、白及根际土壤理化性质和根际土壤可培养细菌遗传多样性。【结果】覆膜处理(PM、BM)可有效抑制杂草生长,以BM抑制杂草效果最好,杂草去除率达99.74%。生物质膜覆盖可有效促进白及生长,与CK和PM相比,BM处理的白及叶片长宽比分别显著提高26.55%和22.03%,SPAD值显著增加21.92%和19.20%(P<0.05);BM处理可显著提高土壤肥力,土壤有机质、速效氮、速效磷、速效钾含量分别比CK处理上升26.58%、35.34%、49.80%、47.43%(P<0.05)。本实验从CK、PM和BM处理土壤分别获得26、23和29株细菌,BOXA1R形成42个遗传群,代表菌株的16S rRNA基因系统发育分析表明,供试菌株分布于8个属,较好地揭示了菌株间的遗传多样性。同时,不同处理土壤优势类群也存在差异,CK处理的优势细菌为粘着剑菌,占比15.4%,BM为假蕈状芽孢杆菌,占比13.8%,PM为花椒芽孢杆菌,占比17.4%。单独从BM处理白及根际土壤分离得到枯草芽孢杆菌、暹罗芽孢杆菌等9个具有促生功能的细菌种群。【结论】生物质膜覆盖种植白及在去除杂草、促进白及生长、有效提升土壤养分方面表现出优良的效果,具有良好的应用前景。

关键词：生物质可降解地膜除草效果白及土壤养分可培养细菌遗传多样性