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Thermoelectric properties of In-substituted Ge-based clathrates prepared by HPHT

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Journal of Materiomics 2018年第1期4卷 68-74页

作者： Binwu Liu Hongan Ma Dexuan Huo haiqiang Liu Baomin Liu jiaxiang Chen Xiaopeng jia National Key Lab of Superhard Materials Jilin UniversityChangchun 130012China Institute of Materials Physics Hangzhou Dianzi UniversityHangzhou 310018China

Bulk materials Ba_(8)Ga_(16)In_(x)Ge_(30-x)(x=0.5,1.0,1.5)were prepared by High-Pressure and High-Temperature(HPHT)method and the crystal structure has been confirmed by X-ray diffraction and cell *** actual In composition was much lower than the starting composition,and lattice constants increased with the increase of *** the temperature increased,the Seebeck coefficient and electrical resistivity increased first and then decreased,while the thermal conductivity was the opposite,which leads to significant enhancement on thermoelectric properties of the *** substitution of indium elements decreased the seebeck coefficient and electrical resistivity,and also changed the microstructure of the compounds.A minimum thermal conductivity of 0.84Wm^(-1)1K^(-1)was obtained,and a good ZT value of 0.52 was *** grain boundaries and lattice defects generated by high pressure can effectively scatter phonons of different frequencies,which reduce the lattice thermal conductivity.

关键词： Clathrates HPHT Synthesis Thermoelectric properties

晋西黄土区不同坡向刺槐林下植物种间关联及群落稳定性

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东北林业大学学报 2024年第5期52卷 19-27页

作者：张犇赵廷宁张海强杨建英贾亚倢赵炯昌胡亚伟李阳北京林业大学北京100083 黄河水土保持天水治理监督局

为了解人工林群落内物种的种间关系及群落稳定性,以晋西黄土区人工刺槐(Robinia pseudoacacia)林为研究对象,在样地调查的基础上,采用方差比率法、χ2检验、戈登·摩尔稳定性等方法,对林下植物的种间关系及群落稳定性进行分析。结果表明... 详细信息

为了解人工林群落内物种的种间关系及群落稳定性,以晋西黄土区人工刺槐(Robinia pseudoacacia)林为研究对象,在样地调查的基础上,采用方差比率法、χ2检验、戈登·摩尔稳定性等方法,对林下植物的种间关系及群落稳定性进行分析。结果表明:(1)调查样地内共有植物30科56属62种。其中,灌木层植物10科18属19种,杠柳(Periploca sepium)为优势种;草本层植物22科38属43种,虉草(Phalaris arundinacea)为优势种。阳坡有14种灌木,阴坡有7种;阴坡有28种草本植物,阳坡有24种。(2)不同坡向刺槐人工林内植物种的关联性不同,阳坡黑麦草(Lolium perenne)和白首乌(Cynanchum bungei)的关联性极显著(P<0.01);半阳坡茜草(Rubia cordifolia)、虉草(Phalaris arundinacea)和北柴胡(Bupleurum chinense)的关联性极显著(P<0.01);阴坡蛇莓(Duchesnea indica)和芦苇(Phragmites australis)的关联性显著(P<0.05);半阴坡酸枣(Ziziphus jujuba)、卫矛(Euonymus alatus)、蒌蒿(Artemisia selengensis)和披针薹草(Carex lancifolia)的关联性极显著(P<0.01)。(3)阳坡和阴坡的林下植物群落整体稳定性强,半阳坡和半阴坡的林下灌木群落稳定性强。

关键词：刺槐林种间关联群落稳定性坡向晋西黄土区

High-thermoelectric performance of TiO_(2-x)fabricated under high pressure at high temperatures

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Journal of Materiomics 2017年第4期3卷 286-292页

作者： haiqiang Liu Hongan Ma Taichao Su Yuewen Zhang Bing Sun Binwu Liu Lingjiao Kong Baomin Liu Xiaopeng jia State Key Laboratory of Superhard Materials Jilin UniversityChangchun 130012China School of Materials Science and Engineering Henan Polytechnic UniversityJiaozuo 454000China

We present the work about the initiative fabrication of multi-scale hierarchical TiO2-x by our strategy,combining high pressure and high temperature(HPHT)reactive sintering with appropriate ratio of coarse Ti to nanosized TiO_(2).Ubiquitous lattice defects engineering has also been achieved in our samples by *** thermoelectric performance was significantly enhanced,and rather low thermal conductivity(1.60 W m^(-1)K^(-1))for titanium oxide was reported here for ***,a high dimensionless figure of merit(zT)up to 0.33 at 700℃was realized in *** far as we know,this value is an enhancement of 43%of the ever best result about nonstoichiometric TiO_(2)and the result is also exciting for oxide thermoelectric *** moderate power factor,the significantly reduced thermal conductivity and the remarkable synergy between electrical properties and thermal conductivity are responsible for the excellent thermoelectric *** develop a facile strategy for preparing multi-scale hierarchical TiO_(2-x)and its superior ability to optimize thermoelectric performance has been demonstrated here.

关键词： High pressure High temperature Multi-scale TiO_(2-x) Thermoelectric Integrated phonon scattering

8种杀虫剂对草地贪夜蛾幼虫的室内杀虫活性及毒力测定

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植物检疫 2024年第1期38卷 64-71页

作者：刘海强贾龙杜伟陆占军李宗泽胡诗瑶宁夏大学农学院宁夏银川750021 宁夏回族自治区农业技术推广总站银川海关

为筛选农业生产中防治草地贪夜蛾幼虫效果较好的杀虫剂,以草地贪夜蛾初孵幼虫和3龄幼虫作为试材,采用浸叶法,研究了8种杀虫剂对草地贪夜蛾幼虫的室内杀虫活性和毒力测定。结果表明:8种杀虫剂对草地贪夜蛾初孵幼虫在田间推荐最低剂量下药... 详细信息

为筛选农业生产中防治草地贪夜蛾幼虫效果较好的杀虫剂,以草地贪夜蛾初孵幼虫和3龄幼虫作为试材,采用浸叶法,研究了8种杀虫剂对草地贪夜蛾幼虫的室内杀虫活性和毒力测定。结果表明:8种杀虫剂对草地贪夜蛾初孵幼虫在田间推荐最低剂量下药后72 h、对3龄幼虫在田间推荐最高剂量下药后96 h的校正死亡率均为100%,都具有很好的杀虫活性;在室内毒力测定中,10%多杀霉素甲维盐WG和5%甲氨基阿维菌素苯甲酸盐WG对草地贪夜蛾初孵幼虫药后24 h和48 h的LC50值分别为0.010 8 mg/L和0.010 9 mg/L,以及0.009 1 mg/L和0.007 7 mg/L,相对毒力较高;5%甲氨基阿维菌素苯甲酸盐WG对3龄幼虫药后24 h和48 h的LC50值分别为0.024 6 mg/L和0.017 9 mg/L,相对毒力最高;8种杀虫剂对草地贪夜蛾初孵幼虫和3龄幼虫均表现为同一杀虫剂对初孵幼虫的LC50值小于处理相同时间下对3龄幼虫的LC50值,且同一杀虫剂处理48 h的LC50值小于处理24 h的LC50值;室内杀虫活性和毒力测定均表明草地贪夜蛾初孵幼虫对药剂的抵抗能力弱于3龄幼虫。草地贪夜蛾初孵幼虫对药剂的抵抗能力明显弱于3龄幼虫,推荐在幼虫监测早期用药,5%甲氨基阿维菌素苯甲酸盐WG和10%多杀霉素甲维盐WG的LC50值较低,相对毒力较高,适合作为草地贪夜蛾虫口密度较大或暴发时用药,其他6种药剂在虫口密度较小时可作推荐药剂。

关键词：草地贪夜蛾杀虫剂室内杀虫活性毒力测定

Terminal Fan and Its Impact on Reservoir Quality of 2+3 Reservoir of Upper Second Member of Shahejie Formation, West Zone of Dongpu Depressio

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China Oil & Gas 2014年第2期21卷 17-21页

作者： jia Ying Zhang Jinliang Yu Miao Wang haiqiang China National Oil and Gas Exploration and Development Corporation College of Resources Science and Technology Beijing Normal University

Introduction The 2+3 reservoir are two of the important sets of oil and gas reservoir intervals in Pucheng *** latest resources assessment result indicated that oil-gas resources is plentiful where total petroleum resources is1298.24×104 tons and that of nature gas is 17.31×108cubic *** they were put into exploration and development,2+3 reservoir in south district of Pucheng Oilfield had been drilled in 109 wells.67 wells have obtained the oil and gas ***,exploration of the 2+3 reservoir is complicated and stable oil production is difficult to be maintained in some wells in the discovered oil *** most essential reason for this,except for the complex geological

关键词：水库水质沙河街组东濮凹陷会员上层风扇终端油气储集

基于PXA320嵌入式手持终端电源管理的设计

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电子器件 2013年第3期36卷 393-396页

作者：李颀胡海强翟佳陕西科技大学电气与信息工程学院西安710021

针对目前工业用手持设备要求长时间工作的特点,提出基于PXA320嵌入式手持终端电源管理系统的低功耗设计方案。首先分析核心处理器PXA320电源管理的各种工作模式,该核心处理器采用Intel SpeedStep技术能够使电池的续航能力得到提高;然后... 详细信息

针对目前工业用手持设备要求长时间工作的特点,提出基于PXA320嵌入式手持终端电源管理系统的低功耗设计方案。首先分析核心处理器PXA320电源管理的各种工作模式,该核心处理器采用Intel SpeedStep技术能够使电池的续航能力得到提高;然后采用智能电源管理芯片LP3972设计了系统电源管理模块,该模块通过IIC总线与核心处理器PXA320通信,然后通过软件设计实现PXA320对电源管理模块为系统各工作模块的输出电压值的合理调节,最终达到降低手持设备功耗的目的。经实验测试表明,系统在实验测试阶段可稳定运行。

关键词： PXA320 LP3972 低功耗电源管理

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臭氧高级氧化法处理染料废水的研究

中国环境管理干部学院学报 2017年第6期27卷 64-68页

作者：贾通通山海强青岛科技大学环境与安全工程学院山东青岛266042

采用臭氧高级氧化技术对某染料废水进行处理,探究不同条件对染料废水COD以及色度的去除效果的影响,确定最佳工艺条件。在最佳条件下,采用单独臭氧、单独紫外、臭氧-紫外、臭氧-双氧水以及臭氧-铁炭五种氧化方法对染料废水进行处理。结... 详细信息

采用臭氧高级氧化技术对某染料废水进行处理,探究不同条件对染料废水COD以及色度的去除效果的影响,确定最佳工艺条件。在最佳条件下,采用单独臭氧、单独紫外、臭氧-紫外、臭氧-双氧水以及臭氧-铁炭五种氧化方法对染料废水进行处理。结果表明:臭氧氧化技术最佳条件为pH值=8,臭氧流量80 L/h,反应时间为2 h;采用最佳处理方案,采用臭氧-紫外高级氧化技术处理染料废水,其脱色率为98.3%,COD去除率为67.0%。

关键词：染料废水臭氧氧化臭氧联用技术色度 COD

Chinese Stroke Association guidelines for clinical management of cerebrovascular disorders:executive summary and 2019 update of the management of high-risk population

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Stroke & Vascular Neurology 2020年第3期5卷 270-278页

作者： Yilong Wang Shangrong Han haiqiang Qin Huaguang Zheng Bin jiang Yong Cao Yuan Gao Ling Guan Qian jia Yong jiang Yuming jiao Shuya Li Yapeng Li Zixiao Li Wei Liu Xiaojuan Ru Dongling Sun Haixin Sun Penglian Wang Tingting Wang Lixia Zong Lei Guo Xuewei Xie Yuming Xu Yuyuan Xu Xiaomeng Yang Yingying Yang Mengyuan Zhou Wenzhi Wang Chinese Stroke Association Stroke Council Guideline Writing Committee Department of Neurology Beijing Tiantan HospitalCapital Medical UniversityBeijingChina China National Clinical Research Center for Neurological Diseases BeijingChina Department of Neuroepidemiology Beijing Neurosurgical InstituteCapital Medical UniversityBeijingChina Beijing Municipal Key Laboratory of Clinical Epidemiology BeijingChina Department of Neurosurgery Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Neurology Zhengzhou University First Affiliated HospitalZhengzhouHenanChina Department of Neurology Beijing Haidian HospitalBeijingChina 不详

Aim Cerebrovascular disease is the leading cause of death and disability in China,causing a huge burden among patients and their ***,stroke prevention is critical,especially in the high-risk ***,we present the evidence-based guideline suitable for the Chinese *** Literature search of PubMed and Cochrane library(from January 1964 to June 2019)was *** thorough discussion among the writing group members,recommendations were listed and *** guideline was reviewed and discussed by the fellow writing committees of the Chinese Stroke Association’s *** This evidence-based guideline was written in three parts:controlling the risk factors of stroke,utilisation of antiplatelet agents and assessing the risks of first-ever *** recommendations were listed along with the recommending classes and levels of *** This guideline provides recommendations for primary prevention of cerebrovascular disease among high-risk population in *** related risk factors,appropriately using antiplatelet agents,assessing the risk of developing first-ever stroke should help reduce the rate of cerebrovascular disease in China.

关键词： prevention listed high

相思木自水解过程产酸对后续硫酸盐法制浆的影响

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林产化学与工业 2023年第4期43卷 17-24页

作者：宋佳慧周妙方贾文超刘天赐石海强大连工业大学轻工与化学工程学院/辽宁省生物质化学与材料重点实验室辽宁大连116034

为研究相思木自水解过程产酸行为及其对水解后木片硫酸盐法制浆的影响,在水热预处理强度指标P因子93~1 008的范围内进行木片自水解预处理,然后将一部分预抽提后木片通过超声波洗涤去除残留酸,将除酸处理后的预浸渍木片和对照样(即未进... 详细信息

为研究相思木自水解过程产酸行为及其对水解后木片硫酸盐法制浆的影响,在水热预处理强度指标P因子93~1 008的范围内进行木片自水解预处理,然后将一部分预抽提后木片通过超声波洗涤去除残留酸,将除酸处理后的预浸渍木片和对照样(即未进行超声波洗涤)以相同的条件进行硫酸盐法制浆。研究结果表明:自水解液(AHL)中产生的酸含量随预处理强度的增强而增大,导致AHL的pH值呈下降趋势;其中乙酸是主要酸成分,P因子606时乙酸质量浓度达到4.21 g/L,之后随自水解过程缓慢增加到P因子1 008时的4.41 g/L;P因子1 008时还检测到少量甲酸。超声波洗涤去除残留酸后木片蒸煮细浆得率比自水解木片提高了10.1%,同时纸浆Kappa值由31.24下降至19.69(P因子1 008),纸浆黏度没有明显变化,但纤维长度由0.76 mm下降至0.64 mm(P因子1 008),可能是导致超声波洗涤后木片纸浆手抄片的抗张和耐破强度轻微降低的原因。

关键词：自水解相思木酸硫酸盐法制浆生物质精炼