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Utilization of recycled solid waste as ecological reclamation materials based on plant growth experiments and soil quality analysis

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Journal of Mountain Science 2024年第3期21卷 820-834页

作者： QIN Xiaochun NI Anchen YANG Dongxiao xing wenhu LIU Shiliang College of Civil Engineering Beijing Jiaotong UniversityBeijing 100044China Shanxi Road&Bridge Construction Group Co. LtdShanxi 030006China School of Environment Beijing Normal UniversityBeijing 111875China

During the highway construction,a large number of spoil areas will be generated while a large amount of waste slag and soil could not be rationally ***,the vegetation recovery is slow in the spoil areas due to the soil *** at recycling the solid waste,the sieved engineering waste slag with local red clay and corn straw biochar was supplied to solve the problem of insufficient nutrients in engineering waste slag and *** addition,planting experiments of alfalfa(Medicago sativa L.)and Amorpha fruticosa *** with physical and chemical experiments were carried out to prove the feasibility of the novel improved substrate for the reclamation of spoil *** results show that the substrate's improvement effect is mainly affected by the soil to slag ratio and the biochar *** improvement effect of soil matrix in highway spoil area decreases with the increase of the waste slag content,especially when the soil-slag ratio is less than 3,and the promotion of plants is *** the contrary,the improvement effect is proportional to the biochar content(3%-8%).But it is noted that the Cu and Pb in the soil will exceed the clean limit corresponding to the Nemero soil pollution index level when the biochar content is 8%.Therefore,it is recommended that the soil-slag ratio should be≥3,and the biochar content should reach 3%-5%.This research provides experimental basis and technical support for utilizing solid waste resources in the reclamation of highway spoil areas.

关键词： Highway Spoil area Waste slag Modified soil Ecological reclamation

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基于预制孔的SiCf/SiC复合材料微小孔超声振动辅助钻削加工研究

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电加工与模具 2024年第3期 54-60页

作者：肖培乾汪文虎吴晓锋蒋松山熊一峰西北工业大学机电学院航空发动机高性能制造工业和信息化部重点实验室航空发动机先进制造技术教育部工程研究中心陕西西安710072 中国航发动力股份有限公司陕西西安710021

SiCf/SiC复合材料是典型的硬脆性难加工材料。为解决SiCf/SiC复合材料微小孔(<1 mm)加工难题,提高加工精度和改善加工质量,先采用脉冲激光预制SiCf/SiC微小孔,再在不同预制孔尺寸和加工参数下开展直径0.5 mm的SiCf/SiC微小孔超声振动辅... 详细信息

SiCf/SiC复合材料是典型的硬脆性难加工材料。为解决SiCf/SiC复合材料微小孔(<1 mm)加工难题,提高加工精度和改善加工质量,先采用脉冲激光预制SiCf/SiC微小孔,再在不同预制孔尺寸和加工参数下开展直径0.5 mm的SiCf/SiC微小孔超声振动辅助钻削加工试验,最终确定了合适的激光预制孔尺寸及超声振动辅助钻削加工参数域。结果表明:脉冲激光预制孔时存在的较大热影响区和微裂纹等缺陷,会明显影响后续超声辅助钻削微小孔的入、出口质量,推荐的预制孔直径为0.3 mm;超声振动辅助钻削加工时,选择主轴转速为11000~15000 r/min、进给速度为2~10mm/min,可获得加工质量较好的SiCf/SiC微小孔。

关键词：陶瓷基复合材料激光预制孔超声辅助钻削微小孔

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Dielectric Breakdown-Recovery in Logic and Resistive Switching in Memory-Bridging the Gap between the Two Phenomena

Dielectric Breakdown-Recovery in Logic and Resistive Switchi...

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2012 IEEE 11th International Conference on Solid-State and Integrated Circuit Technology(ICSICT-2012)

作者： Kin Leong Pey Nagarajan Raghavan xing Wu wenhu Liu Michel Bosman Singapore University of Technology and Design(SUTD) Division of Microelectronics School of EEENanyang Technological University(NTU) A*STAR Institute of Materials Research and Engineering(IMRE) 3 Research Link

Dielectric breakdown is a well documented phenomenon studied for logic transistors using SiO2/SiON and HfO2 as the oxide material with thickness ranging from 1-5 nm. Recovery of dielectric breakdown has also been reported recently and its implications on the prolonged time dependent dielectric breakdown（TDDB）lifetime are very ***,in the non-volatile memory arena,orders of magnitude change in conductance of the oxide has been observed for different voltage levels, voltage polarities and current densities,which is commonly referred to as"resistive switching". Interestingly,although the gate stacks used for logic and memory applications are very similar in the materials used and dimensions as well,the mechanisms postulated to explain the breakdown-recovery mechanism in logic and switching mechanism in memory are very different. Often,the mechanism underlying switching tends to be very speculative without any convincing physical and electrical evidence that confirms the underlying kinetics of the reversible conductance state transition process. The issue stems from the fact that researchers in logic and memory operate in two distinct domains and seldom interact with each other and as a result,the link between the devices used for these two applications is not clearly recognized by most *** this study,we will bridge the gap between these two phenomena and take advantage of our understanding of dielectric breakdown and recovery to convincingly explain the fundamental physics governing the switching process.

关键词： Switches Logic gates Electrodes Dielectric breakdown Metals Market research

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Prospective study of the short-term effect of 1.75 mmol/L calcium concentration dialysate on hemodialysis patients

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Family Medicine and Community Health 2014年第2期2卷 15-21页

作者： Dongliang Zhang Fang Sun Yilun Zhou Xiaofeng Duan Yi Sun Taigen Cui wenhu Liu Department of Nephrology Beijing Friendship HospitalCapital Medical UniversityBeijing 100050China Department of Nephrology Beijing Chao-yang HospitalCapital Medical UniversityBeijing 100020China Department of Nephrology Fu Xing HospitalCapital Medical UniversityBeijing 100045China Department of Nephrology Capital Medical UniversityBeijing 100069China

Objective:The purpose of the current study was to determine the influence of a 1.75 mmol/L calcium(Ca)concentration dialysate(DCa 1.75)during maintenance hemodialysis(MHD)therapy for patients with chronic kidney disease,mineral,and bone disorders(CKD-MBD)on biochemical indices and clinical ***:Four hundred eighty-three MHD patients from three hemodialysis centers were *** 24 months of follow-up(January 2011 to December 2012),289 patients from Center 1 who used 1.50 mmol/L Ca concentration dialysate(Dca 1.50)between January and December 2011 and DCa 1.75 between January and December 2012 were included in the high Ca *** remaining 194 patients from the other centers who used DCa 1.50 for hemodialysis between January 2011 and December 2012 were included in the ordinary Ca *** following CKD-MBD biochemical indices were monitored:blood Ca;blood phosphorus(P);intact parathyroid hormone(iPTH);and bone-specific alkaline phosphatase(BAP).The metastatic calcification index included calcification of aortic arch scoring(AoACS),abdominal aorta calcification(AAC),and cardiac valve calcification(CVC).The study end points included all-cause mortality(ACM),car-diovascular and cerebrovascular diseases(CCVDs),fractures,and new metastatic *** changes between the two groups in the observed indices were ***:Two hundred eighty-four patients in the high Ca group(98.3%)and 194 patients in the ordinary Ca group(100.0%)completed an average follow-up of 21.3±5.6 *** DCa 1.75 was used,the blood Ca in the high Ca group increased[(2.39±0.22)mmol/L vs.(2.34±0.21)mmol/L,t=-2.910,P=0.004]compared to the previous year,and increased[(2.39±0.22)mmol/L vs.(2.30±0.16)mmol/L,t=5.187,P<0.001]compared to the ordinary Ca group in the same *** blood P and iPTH decreased[(1.78±0.39)mmol/L vs.(1.89±0.42)mmol/L,t=2.909,P=0.004 and(306.5±298.6)pg/ml vs.(425.7±365.1)pg/ml,t=8.377,P<0.001,respectively]compared with the previous year,an

关键词： Hemodialysis dialysate Dialysate Calcium Phosphorus Parathyroid hormone

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Darbepoetin alfa injection versus epoetin alfa injection for treating anemia of Chinese hemodialysis patients with chronic kidney failure:A randomized,open-label,parallel-group,non-inferiority Phase III trail

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Chronic Diseases and Translational Medicine 2022年第1期8卷 59-70页

作者： Nan Chen Changying xing Jianying Niu Bicheng Liu Junzhou Fu Jiuyang Zhao Zhaohui Ni Mei Wang wenhu Liu Jinghong Zhao Ling Zhong Xiongfei Wu Wenge Li Yuqing Chen Wei Shi Jianghua Chen Aiping Yin Ping Fu Rong Wang Gengru Jiang Fanfan Hou Guohua Ding Jing Chen Gang Xu Yuichiro Kondo Yuliang Su Changlin Mei Department of Nephrology Ruijin Hospital Shanghai Jiaotong University School of MedicineShanghai 200025China Department of Nephrology Jiangsu Provincial HospitalNanjingJiangsu 210036China Department of Nephrology Shanghai Fifth People's HospitalFudan UniversityShanghai 200240China Department of Nephrology Zhongda Hospital Southeast UniversityNanjingJiangsu 210009China Department of Nephrology Guangzhou First People's HospitalGuangzhouGuangdong 510180China Department of Nephrology The Second Hospital of Dalian Medical UniversityDalianLiaoning 116027China Department of Nephrology Renji Hospital Shanghai Jiaotong University School of MedicineShanghai 200001China Department of Nephrology Peking University People's HospitalBeijing 100044China Department of Nephrology Beijing Friendship HospitalCapital Medical UniversityBeijing 100050China Department of Nephrology Xinqiao Hospital of Army Medical UniversityChongqing 400037China Department of Nephrology The Second Affiliated Hospital of Chongqing Medical UniversityChongqing 400010China Department of Nephrology Southwest Hospital of Army Medical UniversityChongqing 400039China Department of Nephrology China-Japan Friendship HospitalBeijing 100029China Department of Nephrology Peking University First HospitalBeijing 100034China Department of Nephrology Guangdong Provincial People's HospitalGuangzhouGuangdong 510080China Department of Nephrology The First Affiliated HospitalZhejiang University School of MedicineHangzhouZhejiang 310003China Department of Nephrology First Affiliated Hospital of Xi'an Jiaotong UniversityXi'anShaanxi 710061China Department of Nephrology West China HospitalSichuan UniversityChengduSichuan 610041China Department of Nephrology Shandong Provincial HospitalJinanShandong 250021China Department of Nephrology Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai 200092China Department of Nephrology Nanfang Hospital Southern Medical UniversityGuangzhouGuangdong 5105

Background:Erythropoietin is a glycoprotein that mainly regulates *** patients with chronic renal failure with anemia,darbepoetin alfa can stimulate erythropoiesis,correct anemia,and maintain hemoglobin *** study was designed to demonstrate the efficacy and safety of darbepoetin alfa injections as being not inferior to epoetin alfa injections(Recombinant Human Erythropoietin injection,rHuEPO)when maintaining hemoglobin(Hb)levels within the target range(10.0-12.0 g/dL)for the treatment of renal ***:Ninety-five patients were enrolled in this study from April 15,2013 to April 10,2014 at 25 *** this study,patients(n=95)aged 18-70 years were randomized into a once per week intravenous darbepoetin alfa group(n=56)and a twice or three times per week intravenous epoetin alfa group(n=39)for 28 weeks,who had anemia with hemoglobin levels between 6 g/dL and 10 g/dL due to chronic kidney disease(CKD)and were undergoing hemodialysis or hemofiltration with ESA-naive(erythropoiesis stimulating agent-naive).The primary efficacy profile was the mean Hb level(the non-inferiority margin was-1.0 g/dL,week 21-28);the secondary efficacy profiles were the Hb increase rate(week 0-4),the target Hb achievement cumulative rate and time,the change trends of the Hb levels,and the target Hb maintenance *** events(AEs)were observed and compared,and the efficacy and safety were analyzed between the two treatment ***,the frequencies of dose adjustments between the darbepoetin alfa and epoetin alfa groups were compared during the treatment ***?software version 9.2 was used to perform all statistical *** statistics were used for all efficacy,safety,and demographic variable analyses,including for the primary efficacy ***:The mean Hb level was 11.3 g/dL in the darbepoetin alfa group and 10.7 g/dL in the epoetin alfa group,respectively;the difference of the lower limits of the 95%confidence intervals(C

关键词： anemia chronic renal failure darbepoetin alfa hemodialysis recombinant human erythropoietin

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Efficacy and safety of darbepoetin alfa injection replacing epoetin alfa injection for the treatment of renal anemia in Chinese hemodialysis patients:A randomized,open-label,parallel-group,noninferiority phase III trial

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Chronic Diseases and Translational Medicine 2022年第2期8卷 134-144页

作者： Bicheng Liu Nan Chen Jinghong Zhao Aiping Yin Xiongfei Wu Changying xing Gengru Jiang Junzhou Fu Mei Wang Rong Wang Jianying Niu Ping Fu Zhaohui Ni Fanfan Hou Jiuyang Zhao Jing Chen Yuqing Chen Wei Shi Jianghua Chen Wenge Li Gang Xu Ling Zhong wenhu Liu Guohua Ding Yuichiro Kondo Changhe Yue Changlin Mei Department of Nephrology Zhongda Hospital Southeast UniversityNanjingJiangsu 210009China Department of Nephrology Ruijin Hospital Shanghai Jiaotong University School of MedicineShanghai 200025China Department of Nephrology Xinqiao Hospital of Army Medical UniversityChongqing 400037China Department of Nephrology First Affiliated Hospital of Xi'an liaotong UniversityXi'anShaanxi 710061China Department of Nephrology Southwest Hospital of Army Medical UniversityChongqing 400039China Department of Nephrology Jiangsu Provincial HospitalNanjingJiangsu 210036China Department of Nephrology Xinhua Hospital Affiliated to Shanghai丨iao Tong University School of MedicineShanghai 200092China Department of Nephrology Guangzhou First People's HospitalCiuaiigzhouGuangdong 510180China Department of Nephrology Peking University People's HospitalBeijing 100044China Department of Nephrology Shandong Provincial HospitallinanShandong 250021China Department of Nephrology Shanghai Fifth People's HospitalFudan UniversityShanghai 200240China Department of Nephrology West China HospitalSichuan UniversityChengduSichuan 610041China Department of Nephrology Henji Hospital Shanghai Jiaotong University School of MedicineShanghai 200001China Department of Nephrology Nanfang Hospital Southern Medical UniversityGuangzhouGuangdong 510510China Department of Nephrology The Second Hospital of Dalian Medical UniversityDalianLiaoning 116023China Department of Nephrology Huashan HospitalFudan UniversityShanghai 200040China Department of Nephrology Peking University First HospitalBeijing 100034China Department of Nephrology Guangdong Provincial People's HospitalGuangzhouGuangdong 510080China Department of Nephrology The First Affiliated HospitalZhejiang University School of MedicineHangzhouZhejiang 310003China Department of Nephrology China-Japan Friendship HospitalBeijing 100029China Department of Nephrology Tongji Hospital Tongji Medical College Huazhong University of Science and TechnologyWuhanHubei

Background:This study was to explore the clinical efficacy and safety of darbepoetin alfa injection replacing epoetin alfa injection(recombinant human erythropoietin injection,rHuEPO)for the treatment of anemia associated with chronic kidney failure in Chinese patients undergoing ***:This study was a multicenter,randomized,open-label,intergroup parallel control phase III noninferiority trial from April 19,2013 to September 9,2014 at 25 *** this study,the members of the darbepoetin alfa group underwent intravenous administration once per week or once every two *** members of the control drug epoetin alfa group underwent intravenous administration two or three times per *** subjects underwent epoetin alfa administration during the 8-week baseline *** that,subjects were randomly assigned to the darbepoetin alfa group or epoetin alfa *** noninferiority in the changes of the average Hb concentrations from the baseline to the end of the evaluation period(noninferiority threshold:-1.0 g/dl)was tested between the two *** time-dependent hemoglobin(Hb)concentration and the maintenance rate of the target Hb concentration(the proportion of subjects with Hb concentrations between 10.0 and 12.0 g/dl)were also *** metabolism,including changes in the serum iron,total iron-binding capacity,ferritin,transferrin saturation,and comparisons of the dose adjustments between the two groups during the treatment period were analyzed *** events(AEs)were also observed and compared,and the safety was analyzed between the two treatment *** conversion rate switching from epoetin alfa to darbepoetin alfa was also ***?software version 9.2 was used to perform all statistical *** statistics were used for all efficacy,safety,and demographic variable analyses,including for the primary efficacy ***:Four hundred and sixty-six patients were enrolled in this study,and ultimately

关键词： anemia conversion ratio darbepoetin alfa epoetin alfa hemodialysis

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大规格TC4钛合金板坯的制备

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热加工工艺 2017年第7期46卷 183-185页

作者：吴文琥高文超刘璇杨佩王兴母果路西部钛业有限责任公司陕西西安710016

通过真空自耗电弧炉熔炼了TC4钛合金,采用多向锻造的方法制备了大规格TC4钛合金板坯。结果表明,通过多向锻造工艺生产的大规格TC4钛合金板坯能够满足要求。这证明所采用的锻造方式是合理的。

关键词： TC4钛合金大规格板坯

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往复密封数值仿真模型及试验验证

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润滑与密封 2019年第7期44卷 17-20页

作者：黄兴夏迎松黄乐郭飞贾晓红王文虎广州机械科学研究院有限公司广东广州510700 安徽中鼎密封件股份有限公司安徽宣城242300 清华大学摩擦学国家重点实验室北京100084

基于混合润滑理论建立往复密封数值仿真模型,该模型综合考虑了密封系统中密封件的宏观固体力学变形、密封接触区微观粗糙峰接触、油膜厚度分布等因素,可以分析得到往复密封摩擦力、泄漏量等关键性能参数。以往复密封常用的斯特封为研究... 详细信息

基于混合润滑理论建立往复密封数值仿真模型,该模型综合考虑了密封系统中密封件的宏观固体力学变形、密封接触区微观粗糙峰接触、油膜厚度分布等因素,可以分析得到往复密封摩擦力、泄漏量等关键性能参数。以往复密封常用的斯特封为研究对象,通过往复密封基础试验台测量表征往复密封特性的关键参数摩擦力及泄漏量。试验与仿真结果表明:斯特封的瞬时摩擦力随着介质压力的升高而增大,反装斯特封的泄漏量随着往复行程的累积而增加。试验测量结果与仿真模型计算结果基本一致,验证了仿真模型的正确性。

关键词：往复密封数值仿真模型台架试验斯特封

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PTFE复合材料密封圈摩擦特性的对比研究

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润滑与密封 2019年第9期44卷 13-18页

作者：叶素娟黄兴王文虎郭飞夏迎松李国一谭锋广州机械科学研究院有限公司国家橡塑密封工程技术研究中心广东广州510700 清华大学摩擦学国家重点实验室北京100084 安徽中鼎密封件股份有限公司安徽宣城242300

为优选摩擦性能优异的密封用PTFE复合材料,搭建往复密封测试台架,对比研究5类填充PTFE密封圈在长期运行工况下的摩擦磨损性能,并对其失效机制进行分析。结果表明:含Cr 2O 3减磨剂的青铜/PTFE复合材料具有优异的低摩擦、耐磨损与抗蠕变性... 详细信息

为优选摩擦性能优异的密封用PTFE复合材料,搭建往复密封测试台架,对比研究5类填充PTFE密封圈在长期运行工况下的摩擦磨损性能,并对其失效机制进行分析。结果表明:含Cr 2O 3减磨剂的青铜/PTFE复合材料具有优异的低摩擦、耐磨损与抗蠕变性能,泄漏量较少(往复30万次泄漏为10 mL),性能最优;碳粉/石墨填充的PTFE复合材料虽然摩擦因数较低,但其磨损量较大,泄漏量较多;碳纤、玻纤填充的PTFE复合材料摩擦力最大,且抗蠕变性能差,试验过程中密封圈径向尺寸变化明显,泄漏量大。对PTFE往复密封圈而言,填充Cr 2O 3减磨剂的青铜/PTFE复合材料具有较高的实用价值。

关键词： PTFE 复合材料摩擦磨损蠕变密封

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3D打印导航面具在三叉神经球囊压迫术中的应用

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实用医学杂志 2020年第2期36卷 258-262页

作者：张涛邢梦杨陈伟徐军徐文虎李泽福滨州医学院附属医院神经外科

目的探究3D打印导航面具在三叉神经球囊压迫术中的临床应用体会。方法对2015年9月至2018年6月于我院治疗的40例原发性三叉神经痛患者,随机分为A组(DSA引导组,n=20)和B组(3D打印面具组,n=20),A组采取DSA引导行球囊压迫术,B组采取3D打印... 详细信息

目的探究3D打印导航面具在三叉神经球囊压迫术中的临床应用体会。方法对2015年9月至2018年6月于我院治疗的40例原发性三叉神经痛患者,随机分为A组(DSA引导组,n=20)和B组(3D打印面具组,n=20),A组采取DSA引导行球囊压迫术,B组采取3D打印面具引导行球囊压迫术,记录穿刺所用时间、手术总时间、首次穿刺成功率并对患者术后效果进行总体评价。结果与A组相比,B组在首次穿刺时间、手术总时间、DSA扫描次数等方面显著降低,而在首次穿刺成功率、术中球囊呈“梨形”例数、远期疗效等方面明显高于A组。结论3D打印面具引导球囊压迫术有穿刺准确、节省时间、并发症少、安全性高的优点,有较为重要的临床应用意义。

关键词： 3D打印技术经皮球囊压迫术三叉神经痛数字化设计导航模块

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