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Study on the subgrade deformation under high-speed train loading and water–soil interaction

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Acta Mechanica Sinica 2016年第2期32卷 233-243页

作者： Jian Han Guo-Tang zhao Xiao-zhen sheng Xue-Song Jin State Key Laboratory of Traction Power Southwest Jiaotong University Chengdu 610031 China China Railway Corporation Beijing 100844 China

It is important to study the subgrade characteristics of high-speed railways in consideration of the water–soil coupling dynamic problem,especially when high-speed trains operate in rainy *** study develops a nonlinear water–soil interaction dynamic model of slab track coupling with subgrade under high-speed train loading based on vehicle–track coupling *** using this model,the basic dynamic characteristics,including water–soil interaction and without water induced by the high-speed train loading,are *** main factors-the permeability coefficien and the porosity-influencin the subgrade deformation are *** developed model can characterize the soil dynamic behaviour more realistically,especially when considering the influenc of water-rich soil.

关键词： Water–soil interaction High-speed train loading Finite difference method Subgrade deformation Permeability coefficien Porosity

Identification of three Berberis species as potential alternate hosts for Puccinia striiformis f. sp. tritici in wheat-growing regions of Xinjiang, China

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Journal of Integrative Agriculture 2019年第12期18卷 2786-2792页

作者： ZHUANG Hua zhao Jing HUANG Li-li KANG zhen-sheng zhao Jie State Key Laboratory of Crop Stress Biology for Arid Areas College of Plant Protection Northwest A&F University

Since the recent discovery of barberry(Berberis spp.)as an alternate host for the stripe rust pathogen Puccinia striiformis,many Chinese Berberis species have been identified as alternate hosts for *** ***,little is known about Berberis species and their distribution in wheat-growing regions in Xinjiang,China,where stripe rust is *** the largest province or autonomous region,Xinjiang represents a relatively independent epidemic region for wheat stripe rust in *** this study,we con ducted a survey of barberry plants in the main wheat-growi ng areas of *** iden tified three Berberis species,***,*** and ***,and con firmed their roles as potential alternate hosts for *** *** in the laboratory.

关键词： barberry alternate host sexual reproduction stripe rust yellow rust

Accurate Period Approximation for Any Simple Pendulum Amplitude

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Chinese Physics Letters 2012年第4期29卷 129-132页

作者： XUE De-sheng ZHOU zhao GAO Mei-zhen Key Lab for Magnetism and Magnetic Materials of the Ministry of Education Lanzhou UniversityLanzhou 730000

Accurate approximate analytical formulae of the pendulum period composed of a few elementary functions for any amplitude are *** on an approximation of the elliptic integral,two new logarithmic formulae for large amplitude close to 180° are *** the trigonometric function modulation results from the dependence of relative error on the amplitude,we realize accurate approximation period expressions for any amplitude between 0 and 180°.A relative error less than 0.02% is achieved for any *** kind of modulation is also effective for other large-amplitude logarithmic approximation expressions.

关键词： approximation formulae logarithmic

疝环充填式无张力疝修补术并发症原因分析及预防

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国际外科学杂志 2008年第12期35卷 863-864页

作者：赵振生王红禄李珍颜玉君曹双军于海洋北京市房山区良乡医院普外科北京102401

目的分析疝环充填式无张力腹股沟疝修补术并发症发生的原因。方法总结2002年6月～2007年5月采用疝环充填式无张力疝修补术治疗腹股沟疝332例，分析其并发症的发生情况。结果随访15～60个月，术后切口持续疼痛3例，术后复发1例，阴囊水... 详细信息

目的分析疝环充填式无张力腹股沟疝修补术并发症发生的原因。方法总结2002年6月～2007年5月采用疝环充填式无张力疝修补术治疗腹股沟疝332例，分析其并发症的发生情况。结果随访15～60个月，术后切口持续疼痛3例，术后复发1例，阴囊水肿16例，尿潴留20例。结论术中仔细解剖是减少无张力疝修补并发症的关键。

关键词：腹股沟疝疝环充填式无张力修补术并发症

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多晶铁纤维吸波材料的微波磁性研究

磁性材料及器件 2000年第1期31卷 18-20,38页

作者：赵振声张秀成聂彦何华辉华中理工大学电子科学与技术系湖北武汉430074

实验研究了纤维组分、直径和长径比对多晶铁纤维微波磁导率的影响。结果表明，选择具有高本征磁导率和低电导率的材料制备多晶铁纤维有利于提高多晶铁纤维的微波磁导率；多晶铁纤维的微波磁导率随纤维直径的增大而减小，随长径比的增大... 详细信息

实验研究了纤维组分、直径和长径比对多晶铁纤维微波磁导率的影响。结果表明，选择具有高本征磁导率和低电导率的材料制备多晶铁纤维有利于提高多晶铁纤维的微波磁导率；多晶铁纤维的微波磁导率随纤维直径的增大而减小，随长径比的增大而增大。介绍了一种高性能多晶铁纤维的研制及其微波磁性。

关键词：吸波材料多晶铁纤维微波磁特性

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钼对小鼠后代肾脏的损伤作用

动物医学进展 2012年第8期33卷 52-55页

作者：王瑞红王雪莹朱重伟林霖王亚垒赵振升张才河南科技大学动物科技学院河南洛阳471003

为探讨长期钼暴露对子代小鼠肾功能的影响,采用2月龄清洁级小鼠60只(雌雄比2∶1),随机分为4组(每组10只雌鼠,5只雄鼠),雌雄分开饲养。饮水中加入不同剂量Na2MoO4.2H2O组成空白对照组、低钼组(100mg/L)、中钼组(200mg/L)和高钼组(400mg/L... 详细信息

为探讨长期钼暴露对子代小鼠肾功能的影响,采用2月龄清洁级小鼠60只(雌雄比2∶1),随机分为4组(每组10只雌鼠,5只雄鼠),雌雄分开饲养。饮水中加入不同剂量Na2MoO4.2H2O组成空白对照组、低钼组(100mg/L)、中钼组(200mg/L)和高钼组(400mg/L),4周后雌雄合笼饲养,待其产仔。妊娠期和哺乳期母鼠仍按原分组给予不同剂量的钼。仔鼠断奶后,同样按原分组给予不同剂量的钼。饲养8周后,再从每组后代中随机选取雌性小鼠10只和雄性小鼠5只合笼饲养,待其产仔。如此反复,使小鼠繁殖4代。选取第3代(F2)、第4代(F3)小鼠眼球摘除法采血并分离血清,测定血清肌酐和尿素氮。采集肾脏测定微核率和肾组织切片。结果表明,当饮水中Na2MoO4.2H2O达到200mg/L以上时,可显著增加后代小鼠肾细胞微核率(P<0.05)和血清肌酐浓度(P<0.05),降低血清尿素氮含量(P<0.05)。说明钼制剂可对小鼠后代肾脏产生损伤作用。

关键词：钼肾脏微核率肌酐尿素氮

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杭州市7个景区泉水元素测定及水质分析

中国卫生检验杂志 2017年第9期27卷 1326-1327,1337页

作者：李兆翌盛振华林冰倩葛尔宁杭州市西溪医院浙江杭州310023 浙江中医药大学浙江杭州310053

目的通过研究杭州市7个景区泉水的感官指标、溶解性总固体、酸碱度以及微量元素含量,了解目前杭州市区泉水水质的现状。方法以杭州市区居民日常取水人次较多的景区泉水点为分析对象,共7处采集点,测定各泉水TDS值及pH值,采用电感耦合等... 详细信息

目的通过研究杭州市7个景区泉水的感官指标、溶解性总固体、酸碱度以及微量元素含量,了解目前杭州市区泉水水质的现状。方法以杭州市区居民日常取水人次较多的景区泉水点为分析对象,共7处采集点,测定各泉水TDS值及pH值,采用电感耦合等离子体发射光谱法(ICP-OES)进行16种元素含量的分析,根据GB 5749—2006《生活饮用水卫生标准》对泉水水质安全进行评估。结果杭州市7个不同景区居民日常饮用泉水的TDS值符合限值标准,pH值低于规定限值,部分水样Mn、Bi、Al、Hg元素超出限值。结论杭州市7个景区泉水均含有丰富的矿物元素,2处泉水点符合生活饮用水限量标准,5处泉水点有毒元素超出标准限量规定,不建议直接饮用超标地区的泉水。

关键词：泉水总溶解固体电感耦合等离子体发射光谱法元素分析

黄芪-枯草芽孢杆菌复合发酵制剂对肉鸡生产性能及免疫功能的影响

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中国兽医学报 2015年第7期35卷 1181-1186页

作者：乔宏兴史洪涛王永芬边传周张帅帅赵胜振姜亚乐河南牧业经济学院河南郑州450046 河南农业大学牧医工程学院河南郑州450002

选择1日龄健康肉仔鸡480只,随机分为4组,在饮水中添加复合发酵制剂:试验Ⅰ组(1∶200倍稀释)、试验Ⅱ组(1∶400倍稀释)、试验Ⅲ组(1∶800倍稀释)、对照组。结果显示:(1)生产性能。与对照组相比,试验Ⅱ、Ⅲ组的平均日增重比对照组分别提高... 详细信息

选择1日龄健康肉仔鸡480只,随机分为4组,在饮水中添加复合发酵制剂:试验Ⅰ组(1∶200倍稀释)、试验Ⅱ组(1∶400倍稀释)、试验Ⅲ组(1∶800倍稀释)、对照组。结果显示:(1)生产性能。与对照组相比,试验Ⅱ、Ⅲ组的平均日增重比对照组分别提高11.48%和6.72%(P0.05);Ⅰ组AI抗体滴度低于对照组(P<0.05),Ⅱ、Ⅲ组抗体滴度均高于对照组,分别提高了11.34%和8.25%(P<0.05)。结果表明,黄芪-枯草芽孢杆菌复合发酵制剂能够提高肉鸡的生产性能和免疫功能,完全可以替代抗生素使用。

关键词：肉仔鸡枯草芽孢杆菌黄芪

Influence of phosphorus on Microcystis growth and the changes of other environmental factors

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Journal of Environmental Sciences 2005年第6期17卷 937-941页

作者： JIN Xiang-can CHU zhao-sheng YI Wen-li HU Xiao-zhen Research Center for Lake Ecology and Environments Chinese Research Academy of Environmental Sciences Beijing 100012 China Department of Resources and Environments Northwest Sci-Tech University of Agriculture and Forestry Shanxi 712100China

The growth processes of Microcystis aeruginosa （FACHB-41） in simulated Taihu Lake water with different phosphorus concentrations were investigated using laboratory microcosms. The algal biomass increased with the increase of phosphorus concentration when it was lower than 0.445 mg/L, while the dissolved oxygen （DO） and pH increased, dissolved inorganic nitrogen （DIN） and light intensity underwater（I） decreased. Responding to the changes of the “environmental factors”, the cellular carbohydrate and its ratio to cellular protein decreased generally as phosphorus increased. However, when phosphorus concentration was higher than l. 645 mg/L, the biomass, the “environmental factors”, the cellular carbohydrate and its ratio to cellular protein did not change likewise. Since the environmental factors and the physiological and biochemical responses are important factors, the change of environmental factors and cell physiology and biochemistry induced by phosphorus may become the key factors that steer the growth and dominance of Microcystis under certain conditions. To sum up, phosphorus not only stimulate the growth of Microcystis directly by supplying nutrient element, but also has complex interactions with other “environmental factors” and play important roles in the growth processes of Microcystis .

关键词： Microcystis aeruginosa microcosm phosphorus