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Effects of inductive methods on dunging behavior of weaning pigs in slatted floor pens

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International Journal of Agricultural and Biological Engineering 2016年第4期9卷 192-198页

作者： Wang Yu Li Dapeng shen Xiong Shi zhengxiang Key Laboratory of Agricultural Engineering in Structure and Environment Ministry of AgricultureBeijing 100083China College of Water Resources and Civil Engineering China Agricultural UniversityBeijing 100083China Tianjin Key Laboratory of Indoor Air Environmental Quality Control School of Environmental Science and EngineeringTianjin UniversityTianjin 300072China

The excreta of pig is generally utilized to induce pigs to excrete in particular area,which reduces the subsequent work required to clean pens.This paper discussed a new induction device design based on the biological characteristics of pigs.Using different induction materials in the devices,the frequency and location of the excretory behavior of pigs through five treatments and a control group were compared.According to the results,different induction methods had significant(p<0.05)effects on frequency and duration of excretory behavior.Compared to the conventional induction method,the induction devices were significantly(p<0.05)more effective in training pigs to excrete in the assigned area,the most effective material used in the induction devices was feces.If the inductive feces had been preserved in the air for a longer time,the effect of inducing excretory behavior would have been more obvious.Empty devices did not work to induce pigs to excrete in the induction area.

关键词： animal behavior weaning pigs slatted floor pen pig training excretory behavior inductive material

Mineralogical characteristics and photocatalytic properties of natural sphalerite from China

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Journal of Environmental Sciences 2020年第3期32卷 156-166页

作者： Can shen Xiangping Gu Bin Yang Dexian Zhang Zhilin Wang zhengxiang Shu Jeffrey Dick Anhuai Lu Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring Ministry of Education Central South UniversityChangsha 410083China School of Geoscience and Info-physics Central South UniversityChangsha 410083China

Different natural sphalerites have a range of photocatalytic properties that can potentially be exploited for environmental remediation purposes.To develop value in the exploitation of sphalerite,samples were collected from 19 ore deposits in China and characterized for their mineralogical and photocatalytic properties.X-ray diffraction(XRD) and electron probe micro analysis(EPMA) measurements indicated that all the natural sphalerites from various localities crystallized in cubic phases with various chemical compositions.The substitution of Fe for Zn ranged from 0.235% to 14.826% by weight,Mn from 0.004% to4.868%,Cu from 0.009% to 5.529% and Cd from 0.133% to 1.576%.As Fe became more abundant,the color of natural sphalerite darkened,becoming almost black;and higher Fe content was associated with stronger visible light absorption.Photoluminescence spectra showed emission mainly related to S-vacancies and progressively decreasing fluorescence intensity with increasing Fe content.Tests of the photocatalytic degradation of methyl orange indicated that the sample with the highest Cd content but moderate Fe content had the highest photocatalytic activity.Specifically,the degradation of Methyl Orange(30 mg/L)attained 82.11% efficiency under visible light irradiation for 4 hr of natural sphalerite with4.262% Fe and 1.576% Cd.Overall,the Fe content in sphalerite was found to contribute to the visible light absorption ability and the recombination rate of photo-generated electrons and holes,while substitution by Cd was observed to have a greater effect on the photocatalytic properties.These findings provide a scientific basis for the profitable utilization of base metal resources like sphalerite.

关键词： Natural sphalerite Mineralogical properties Band gap Photodegradation of Methyl Orange

Diagenetic fluid evolution and water-rock interaction model of carbonate cements in sandstone: An example from the reservoir sandstone of the Fourth Member of the Xujiahe Formation of the Xiaoquan-Fenggu area, Sichuan Province, China

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Science China Earth Sciences 2014年第7期57卷 1077-1092页

作者： LIU SiBing HUANG SiJing shen ZhongMin Lü zhengxiang SONG RongCai State Key Laboratory of Oil-Gas Reservoirs Geology and Exploitation Chengdu University of Technology

Carbonate cement is the most abundant cement type in the Fourth Member of the Xujiahe Formation in the Xiaoquan-Fenggu area of the West Sichuan Depression. Here we use a systematic analysis of carbonate cement petrology, mineralogy, carbon and oxygen isotope ratios and enclosure homogenization temperatures to study the precipitation mechanism, pore fluid evolution, and distribution of different types of carbonate cement in reservoir sand in the study area. Crystalline calcite has relatively heavy carbon and oxygen isotope ratios(δ13C = 2.14‰, δ18O = -5.77‰), and was precipitated early. It was precipitated directly from supersaturated alkaline fluid under normal temperature and pressure conditions. At the time of precipitation, the fluid oxygen isotope ratio was very light, mainly showing the characteristics of a mixed meteoric water-seawater fluid(δ18O = -3‰), which shows that the fluid during precipitation was influenced by both meteoric water and seawater. The calcite cement that fills in the secondary pores has relatively lighter carbon and oxygen isotope ratios(δ13C = -2.36‰, δ18O = -15.68‰). This cement was precipitated late, mainly during the Middle and Late Jurassic. An important material source for this carbonate cement was the feldspar corrosion process that involved organic matter. The Ca2+, Fe3+ and Mg2+ ions released by the clay mineral transformation process were also important source materials. Because of water-rock interactions during the burial process, the oxygen isotope ratio of the fluid significantly increased during precipitation, by about 3‰. The dolomite cements in calcarenaceous sandstone that was precipitated during the Middle Jurassic have heavier carbon and oxygen isotope ratios, which are similar to those of carbonate debris in the sandstone(δ13C = 1.93‰, δ18O = -6.11‰), demonstrating that the two are from the same source that had a heavier oxygen isotope ratio(δ18O of about 2.2‰). The differences in fluid oxygen isotope ratios during cement precipitation reflect the influences of diff

关键词：碳酸盐胶结物水岩相互作用胶结砂岩流体演化须家河组相互作用模型储集层氧同位素比率

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Geochemical characteristics of noble gases in natural gas and their application in tracing natural gas migration in the middle part of the western Sichuan Depression, China

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Petroleum Science 2013年第3期10卷 327-335页

作者： Wang Peng shen Zhongmin Liu Sibing Lv zhengxiang Zhu Tong Gong Yajun State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of Technology Geology Scientific Research Institute of shengli Oilfield Branch Company SINOPEC

Noble gases in natural gas, from Xiaoquan, Xinchang, Hexingchang and Fenggu gas reservoirs in the middle part of the western Sichuan Depression, China, were analysed. Results show that the volume content of crustal noble gases accounts for 97.9% to 99.7% of the total noble gas content, indicating that the noble gases in the study area are very largely derived from the crust. Moreover, the 40Ar time-accumulating effect of source rocks is used to determine the complex relationship between gases and source rocks in this area, and the results agree well with that from analysis of source rock light hydrocarbons. Due to the short migration distance, the separation of 4He and 40Ar is not significant in Xujiahe natural gas and Lower and Middle Jurassic natural gas, so it is difficult to trace natural gas migration. However, this separation characteristic of 4He and 40Ar in Middle and Upper Jurassic natural gas is significant, which indicates that natural gas migration was from the Middle Jurassic to Upper Jurassic formations. In addition, the variation trends of 3He/4He ratio and δ13C1 value indicates that natural gas migration is from the Xujiahe formation to the Jurassic layer in the study area.

关键词： Western Sichuan Depression noble gas He and Ar isotopes natural gas migration

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基于离散化路径与拼接的高精度光学检测方法

红外与激光工程 2022年第11期51卷 316-325页

作者：沈正祥王旭余俊同济大学先进微结构材料教育部重点实验室上海200092 同济大学物理科学与工程学院精密光学工程技术研究所上海200092

在超精密光学元件制造中,高精度光学检测技术是进一步提升光学加工精度和表征评价光学表面形貌的基础关键。非接触式光学检测方法凭借高效和无损伤检测的特点,取得广泛应用。但外界环境扰动容易对光学检测探针产生影响,降低检测精度。为... 详细信息

在超精密光学元件制造中,高精度光学检测技术是进一步提升光学加工精度和表征评价光学表面形貌的基础关键。非接触式光学检测方法凭借高效和无损伤检测的特点,取得广泛应用。但外界环境扰动容易对光学检测探针产生影响,降低检测精度。为此,文中提出了一种离散化检测路径与拼接方法,将传统螺旋线路径离散为多圆周和多径向路径,并通过路径间数据的相互拼接,减小了环境扰动误差。分析了离散化检测路径的参数设置,给出了一种均匀化的圆周路径分布策略。最后,基于自行搭建的光学检测平台,进行了环境误差抑制方法的验证实验。相较于抑制前的面形,抑制后的测量相对误差从24.3%降到了4.3%。

关键词：光学检测环境误差路径规划数据拼接

Atacamite and Nantokite in Kaerqueka Copper Deposit of Qimantag Area:Evidence for Cenozoic Climate Evolution of the Qaidam Basin

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Journal of Earth Science 2017年第3期28卷 492-499页

作者： Liwen Yi Xiangping Gu Anhuai Lu Xiangyu Li Dexian Zhang Zhiling Wang Jianping Liu Shuai Li zhengxiang Shu Cui Yu Hongyan Zuo Can shen College of Resources and Environmental Sciences Hunan Normal UniversityChangsha 410081China Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitor Ministry of EducationChangsha 410083China School of Geosciences and Info-Physics Central South UniversityChangsha 410083China Hunan Institute of Geological Survey Changsha 410116China

Using a mineralogy method to reflect climate evolution is a new approach to research Cenozoic environmental progression of the Qaidam Basin. In this paper, we present the chemical composition and crystallographic parameter of atacamite, nantokite, and tenorite in cryptocrystalline aggregates from the Kaerqueka copper deposit of Qimantag metallogenic belt by means of electron microprobe and in-situ X-ray diffraction analyses. Atacamite and nantokite occur in an intimate intergrowth as the secondary precipitation of chalcopyrite and bornite filling in the interstitial space of andradite in the Kaerqueka copper deposit, with an average composition of Cl： 12.38 wt.%, Cu： 63.76 wt.%, O： 21.46 wt.%. X-ray microdiffraction shows that the intergrowth contains nantokite with a cubic unit cell a=5.403（2）？ and atacamite with an orthorhombic unit cell a=6.030（3）, b=6.883（2）, c=9.114（1）？. XRD quantitative calculation shows that the nanometric aggregate contains 36.07 wt.% tenorite, 18.41 wt.% atacamite, and 45.52 wt.% nantokite. The presence of nantokite and atacamite requires saline solutions for their formation and hyper-arid climate conditions for their preservation. Combined with the data of salt lakes and the pollen sequence of western China, we suggest that during the uplift of the Tibetan Plateau and the retreat of the Paratethys, saline water was forced to the surface through a basal fracture zone. In the hyper-arid climate of the Qaidam Basin, the recharge of groundwater by direct precipitation is negligible, and groundwater is derived from inflow from the salt lakes. Thus, atacamite is preserved. In addition, spertiniite in the edge and fractures of atacamite and nantokite may represent wetter climate after the formation of atacamite and nantokite.

关键词： atacamite nantokite climate evolution Qaidam Basin

11个省市16家医疗机构应用富马酸伏诺拉生治疗胃食管反流病的研究

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中国医院用药评价与分析 2023年第3期23卷 321-324页

作者：李正翔段蓉申慧明天津医科大学总医院药剂科天津300052 北京普瑞快思医药咨询有限公司研究中心北京100025

目的:以真实世界研究为基础,探讨富马酸伏诺拉生治疗胃食管反流病的临床应用情况及诊疗特点。方法:基于2021年《医院处方分析合作项目》数据库,采用分层随机抽样的方法,抽取应用富马酸伏诺拉生或质子泵抑制剂治疗胃食管反流病的患者门诊... 详细信息

目的:以真实世界研究为基础,探讨富马酸伏诺拉生治疗胃食管反流病的临床应用情况及诊疗特点。方法:基于2021年《医院处方分析合作项目》数据库,采用分层随机抽样的方法,抽取应用富马酸伏诺拉生或质子泵抑制剂治疗胃食管反流病的患者门诊/住院处方数据,利用SPSS 25.0软件,对患者基本信息、年就诊次数、年用药时长和单疗程用药时长进行统计学分析。结果:共纳入2021年11个省/自治区/直辖市16家医疗机构的4 136例患者处方数据,其中富马酸伏诺拉生治疗组患者641例,质子泵抑制剂治疗组患者3 495例。两组患者年龄的差异有统计学意义(P<0.05),但与年用药时长、年就诊次数、单疗程用药时长的相关性均极弱。富马酸伏诺拉生治疗组患者的年就诊次数为1(1,1)次,年用药时长为14(14,28)d,单疗程用药时长为14(14,28) d;质子泵抑制剂治疗组患者的年就诊次数为2(2,3)次,年用药时长为34(18,65)d,单疗程用药时长为28(14,40) d;富马酸伏诺拉生治疗组患者各项指标均显著低于质子泵抑制剂治疗组,差异均有统计学意义(P<0.05)。结论:对比质子泵抑制剂,应用富马酸伏诺拉生治疗胃食管反流病可显著减少患者年就诊次数,缩短年用药时长及单疗程用药时长。富马酸伏诺拉生作用快速且持久,具有更高的临床应用价值。

关键词：富马酸伏诺拉生质子泵抑制剂胃食管反流病真实世界研究处方

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面向激光探测的精密光机系统研制及应用

光学精密工程 2022年第21期30卷 2737-2751页

作者：沈正祥余俊王晓强王占山同济大学物理科学与工程学院精密光学工程技术研究所先进微结构材料教育部重点实验室上海市数字光学前沿科学研究基地上海市全光谱高性能光学薄膜器件与应用专业技术服务平台上海200092

面向激光探测需求,创建了涵盖“光学设计-结构设计-元件制造-装调集成-性能评价和应用”的精密光机系统全环节研发平台。发展了“光学设计-结构设计-力热学设计”高效耦合的综合设计方法,建立了基于光机误差分解的精密装配集成方法,形... 详细信息

面向激光探测需求,创建了涵盖“光学设计-结构设计-元件制造-装调集成-性能评价和应用”的精密光机系统全环节研发平台。发展了“光学设计-结构设计-力热学设计”高效耦合的综合设计方法,建立了基于光机误差分解的精密装配集成方法,形成了透射光学系统定心装调、反射光学系统的高精度集成装配流程和技术,配备了光学系统波前和成像性能检测仪器,支撑了多种复杂功能的精密光机系统的研制。本文全面梳理了同济大学面向激光探测需求的精密光机系统和仪器研制方面的科研工作,针对我国“星光Ⅲ”强激光装置的探测需求,研制了首套联合视频合成孔径雷达和扫描光学高温计的主被动复合诊断装置和辐射高温光学测量系统,共同为“星光Ⅲ”开展超高压物态方程实验提供了技术支撑与诊断测试手段。面向海环境下目标与环境激光散射特性的测量需求,研制了发散光激光雷达散射截面测量装置和双功能平行光LRCS激光测量装置,实现了模拟海环境下标准散射体与海环境的激光散射特性的精确测量,为超低空激光雷达研制提供了数学模型和实验数据。

关键词：激光探测光学系统光机设计装配集成视频合成孔径雷达扫描光学高温计激光雷达散射截面测量

移动医疗对膝骨关节炎疾病管理效果的系统评价及Meta分析

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循证护理 2022年第12期8卷 1563-1571页

作者：王青戴正香陈丹丹沈圆娟南京中医药大学护理学院江苏210023 南京中医药大学附属江苏省中医院

目的:探讨移动医疗对膝骨关节炎病人疾病管理效果。方法:计算机检索中国知网、万方数据库、维普数据库、中国生物医学文献数据库、PubMed,the Cochrane Library、Web of Science、EBSCO中关于移动医疗对膝骨关节炎影响的随机对照试验(RC... 详细信息

目的:探讨移动医疗对膝骨关节炎病人疾病管理效果。方法:计算机检索中国知网、万方数据库、维普数据库、中国生物医学文献数据库、PubMed,the Cochrane Library、Web of Science、EBSCO中关于移动医疗对膝骨关节炎影响的随机对照试验(RCT),检索时限为建库至2021年4月30日。由2名研究者独立筛选文献,按照Cochrane手册5.1版的偏倚风险评估工具对文献质量进行评价,采用RevMan 5.3进行统计分析,采用GRADEpro3.6评估证据质量等级。结果:纳入9篇英文RCT,Meta结果显示,试验组与对照组比较在减轻疼痛[短期:SMD=-0.56,95%CI(-1.02,-0.09),P=0.02;远期:SMD=-0.22,95%CI(-0.39,-0.05),P=0.01]、缓解肢体僵硬[SMD=-0.65,95%CI(-0.91,-0.39),P<0.00001]、提高身体功能[短期:SMD=-0.56,95%CI(-0.74,-0.37),P<0.00001;远期:SMD=-0.34,95%CI(-0.62,-0.05),P=0.02]方面效果更好,但试验组与对照组相比在提高生活质量方面差异无统计学意义[SMD=0.05,95%CI(-0.51,0.60),P=0.87]。结论:现有证据表明,与常规干预相比,基于移动医疗的疾病管理可以减轻膝骨关节炎病人的疼痛,改善身体功能和肢体僵硬,但总体效应量较低,证据等级不高,尚需高质量的临床研究进一步验证疗效。

关键词：膝骨关节炎移动医疗系统评价 Meta分析疾病管理循证护理