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Mechanisms of phosphate removal from aqueous solution by blast furnace slag and steel furnace slag

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第1期9卷 125-132页

作者： sheng-gao LU Shi-qiang BAI Hong-dan SHAN College of Environmental and Resource Sciences Zhejiang University Hangzhou 310029 China

We report the adsorption of phosphate and discuss the mechanisms of phosphate removal from aqueous solution by burst furnace slag (BFS) and steel furnace slag (SFS). The results show that the adsorption of phosphate on the slag was rapid and the majority of adsorption was completed in 5~10 min. The adsorption capacity of phosphate by the slag was reduced dramatically by acid treatment. The relative contribution of adsorption to the total removal of phosphate was 26%~28%. Phosphate adsorption on BFS and SFS follows the Freundlich isotherm, with the related constants of k 6.372 and 1/n 1.739 for BFS, and of k 1.705 and 1/n 1.718 for SFS. The pH and Ca2+ concentration were decreased with the addition of phosphate, suggesting the formation of calcium phosphate precipitation. At pH 2.93 and 6.93, phosphate was desorbed by about 36%~43% and 9%~11%, respectively. These results indicate that the P adsorption on the slag is not completely reversible and that the bond between the slag particles and adsorbed phosphate is strong. The X-ray diffraction (XRD) patterns of BFS and SFS before and after phosphate adsorption verify the formation of phosphate salts (CaHPO4·2H2O) after adsorption process. We conclude that the removal of phosphate by BFS and SFS is related to the formation of phosphate calcium precipitation and the adsorption on hydroxylated oxides. The results show that BFS and SFS removed phosphate nearly 100%, indicating they are promising adsorbents for the phosphate removal in wastewater treatment and pollution control.

关键词： Phosphate removal Blast furnace slag (BFS) Steel furnace slag (SFS) Adsorption Precipitation

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非理想相贯焊缝自动化焊接的运动控制研究

热加工工艺 2024年第11期53卷 60-65页

作者：高胜程晓飞李军潘云龙李海超东北石油大学机械科学与工程学院黑龙江大庆163318 哈尔滨工业大学先进焊接与连接国家重点实验室黑龙江哈尔滨150006 哈尔滨石油学院机械工程学院黑龙江哈尔滨150028

为了实现对加工装配存在误差的大构件相贯焊缝的多层多道自动化焊接,在介绍四轴联动焊接机器人结构及工作原理的基础上,建立了集斜交、偏置的通用相贯焊缝数学模型,提出一种连续控制焊枪位置参数及姿态调整值的计算方法,利用关键点示教... 详细信息

为了实现对加工装配存在误差的大构件相贯焊缝的多层多道自动化焊接,在介绍四轴联动焊接机器人结构及工作原理的基础上,建立了集斜交、偏置的通用相贯焊缝数学模型,提出一种连续控制焊枪位置参数及姿态调整值的计算方法,利用关键点示教+分段空间圆弧插补确定焊枪位置,主法面二分角法给出焊枪姿态,最后采用PC机+运动控制卡的方式构成伺服控制系统,驱动电机执行运动控制算法。该运动控制算法通用性较强,对管管焊缝工程化应用具有重要的参考价值。

关键词：相贯焊缝位姿插补运动控制四轴机器人

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局部干法水下焊接装置的研制

热加工工艺 2024年第7期53卷 76-79页

作者：侯瑞麟王妍高胜任永良张瑞明东北石油大学机械科学与工程学院黑龙江大庆163319

为了对核燃料池进行水下焊接,研制了一套局部干法水下焊接装置。通过搭建试验平台,采用该装置在亚克力池中进行了水下非熔化极惰性气体保护电弧焊试验,利用圆形补丁片对不锈钢壁面上的缺陷部位进行焊接修复。结果表明,焊后焊缝成形良好... 详细信息

为了对核燃料池进行水下焊接,研制了一套局部干法水下焊接装置。通过搭建试验平台,采用该装置在亚克力池中进行了水下非熔化极惰性气体保护电弧焊试验,利用圆形补丁片对不锈钢壁面上的缺陷部位进行焊接修复。结果表明,焊后焊缝成形良好,可以实现水下废池的修复,验证了该局部干法水下焊接装置的可行性。

关键词：水下焊接局部干法装置设计

T-PBFT: An EigenTrust-Based Practical Byzantine Fault Tolerance Consensus Algorithm

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China Communications 2019年第12期16卷 111-123页

作者： sheng gao Tianyu Yu Jianming Zhu Wei Cai School of Information Central University of Finance of EconomicsBeijing 100081China Grain Information Processing and Control Key Laboratory of Ministry of Education Henan University of TechnologyZhengzhou 450001China School of Science and Engineering The Chinese University of Hong KongShenzhen 518172China

Blockchain with these characteristics of decentralized structure, transparent and credible, time-series and immutability, has been considering as a promising technology. Consensus algorithm as one of the core techniques of blockchain directly affects the scalability of blockchain systems. Existing probabilistic finality blockchain consensus algorithms such as PoW, PoS, suffer from power consumptions and low efficiency;while absolute finality blockchain consensus algorithms such as PBFT, HoneyBadgerBFT, could not meet the scalability requirement in a largescale network. In this paper, we propose a novel optimized practical Byzantine fault tolerance consensus algorithm based on EigenTrust model, namely T-PBFT, which is a multi-stage consensus algorithm. It evaluates node trust by the transactions between nodes so that the high quality of nodes in the network will be selected to construct a consensus group. To reduce the probability of view change, we propose to replace a single primary node with a primary group. By group signature and mutual supervision, we can enhance the robustness of the primary group further. Finally, we analyze T-PBFT and compare it with the other Byzantine fault tolerant consensus algorithms. Theoretical analysis shows that our T-PBFT can optimize the Byzantine fault-tolerant rate,reduce the probability of view change and communication complexity.

关键词： blockchain consensus protocol Byzantine fault tolerance trust model

APRS: a privacy-preserving location-aware recommender system based on differentially private histogram

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Science China(Information Sciences) 2017年第11期60卷 297-306页

作者： sheng gao Xindi MA Jianming ZHU Jianfeng MA School of Information Central University of Finance and Economics School of Computer Science and Technology Xidian University School of Cyber Engineering Xidian University

Appendix A Preliminaries In this section,we present some preliminaries that server as the basis of *** convenience,the notations used in this paper are listed in Tabel A1.

关键词： a privacy-preserving location-aware recommender system based on differentially private histogram Si

Effect of Dongchongxiacao(Cordyceps) therapy on contrast-induced nephropathy in patients with type 2 diabetes and renal insufficiency undergoing coronary angiography

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Journal of Traditional Chinese Medicine 2015年第4期35卷 422-427页

作者： Zhao Kai Li Yongjian gao sheng Lin Yu Department of Cardiology Tianjin Nankai Hospital

OBJECTIVE: To study the protective effects of Dongchongxiacao(Cordyceps)(DCXC) on contrast-induced nephropathy(CIN) in patients with type 2 diabetes and renal insufficiency undergoing coronary ***: A total of 120 patients with type 2 diabetes whose estimated glomerular filtration rate(e GFR) was ≤ 60 m L/minee grou·1.73 m2,were divided randomly into thrps,basic treatment group(n = 41),standard DCXC therapy group(n = 39,2-g corbrin capsules,3 times/d,3 days before and after angiography),and intensive DCXC therapy group(n = 40,3-g corbrin capsules,3 times/d,3 days before and after angiography). Serum creatinine(Scr)and e GFR were assessed at the time of admission to hospital,and on days 1,2 and 3 after angiography. Urine neutrophil-gelatinase-associated-lipocalin(NGAL),kidney injury molecule-1(KIM-1) and interleukin-18(IL-18) were measured before angiography and at day 1 after angiography for all patients. The primary end point was the prevalence of CIN. The secondary end point was a 25% or greater reduction in e ***: CIN occurred in 11 of 120 patients(9.17 %). The prevalence of CIN was lower in the DCXC treatment groups than in the basic treatment group(P < 0.05),with a more significant decrease in the prevalence of CIN in the intensive DCXC therapy group(P < 0.01). Compared with the basic treatment group,a lower proportion of patients in the DCXC treatment groups had an e GFR decrease of 25% or greater(P < 0.05); patients with an e GFR decrease of 25% or greater accounted for an even lower proportion in the intensive DCXC therapy group(P < 0.01). Within 1 day of the procedure,urine levels of KIM-1,NGAL and IL-18 in patients in the intensive DCXC therapy group were lower than those in the basic treatment group and standard therapy group(P < 0.05).CONCLUSION: DCXC treatment may protect against CIN in patients with type 2 diabetes and renal insufficiency undergoing coronary angiography,with intensive DCXC therapy being more effective.

关键词： Cordyceps sinensis Diabetes mellitus Type 2 Coronary angiography Contrast-induced nephropathy

The Second Main Theorem Concerning Small Algebroid Functions

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Acta Mathematica Sinica,English Series 2012年第10期28卷 2089-2106页

作者： Dao Chun SUN Zong sheng gao Hui Fang LIU School of Mathematics South China Normal University LMIB and Department of Mathematics Beijing University of Aeronautics and Astronautics Institute of Mathematics and Informatics Jiangxi Normal University

In this paper, we firstly give the definition of meromorphic function element and algebroid mapping. We also construct the algebroid function family in which the arithmetic, differential opera- tions are closed. On basis of these works, we firstly prove the Second Main Theorem concerning small algebroid functions for v-valued algebroid functions.

关键词： Algebroid function algebroid mapping corresponding addition the Second Main Theo- rem

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抗菌肽的来源与作用机理及应用

动物医学进展 2024年第4期45卷 112-115页

作者：宋雪莹高圣玥李平李静宋岩佟桂芝黑龙江省农业科学院畜牧兽医分院黑龙江齐齐哈尔160000 黑龙江省鹤岗市农业综合服务中心黑龙江鹤岗154100

抗生素在畜禽养殖中的长期使用,导致了耐药菌株的出现,不仅危害畜禽机体健康,而且对人类健康构成威胁。抗菌肽也称宿主防御肽,是由宿主基因编码的具有抗微生物活性的小分子多肽,多呈阳离子性和两亲性,二级结构包括α-螺旋、β-折叠、无... 详细信息

抗生素在畜禽养殖中的长期使用,导致了耐药菌株的出现,不仅危害畜禽机体健康,而且对人类健康构成威胁。抗菌肽也称宿主防御肽,是由宿主基因编码的具有抗微生物活性的小分子多肽,多呈阳离子性和两亲性,二级结构包括α-螺旋、β-折叠、无规则卷曲等。抗菌肽具有抗菌、抗病毒、抗肿瘤细胞等作用,同时可提高动物机体免疫力,在替代抗生素方面表现出良好效果。论文综述了抗菌肽的来源,可从天然获得和重组改造获得,并揭示了抗菌肽抗菌、抗病毒,增强机体免疫力的作用机制及在临床中的作用。

关键词：抗菌肽耐药性作用机制

基于膜解剖的腹腔镜右半结肠癌根治术与传统腹腔镜手术疗效的对比研究

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中华普通外科杂志 2024年第8期39卷 577-583页

作者：姜慧员赵前高晟王立春马健焦帅江波山西省肿瘤医院、中国医学科学院肿瘤医院、山西医院、山西医科大学附属肿瘤医院结直肠外科太原030013 阳泉市第一人民医院普外科阳泉045000

目的比较膜解剖理念下的腹腔镜右半结肠癌根治术(CME+D3)与传统腹腔镜右半结肠癌根治术(CME/D3)的疗效。方法采用回顾性队列研究方法,收集2018年1月至2020年6月中国医学科学院肿瘤医院山西医院结直肠外科行腹腔镜右半结肠癌根治术的180... 详细信息

目的比较膜解剖理念下的腹腔镜右半结肠癌根治术(CME+D3)与传统腹腔镜右半结肠癌根治术(CME/D3)的疗效。方法采用回顾性队列研究方法,收集2018年1月至2020年6月中国医学科学院肿瘤医院山西医院结直肠外科行腹腔镜右半结肠癌根治术的180例患者的临床资料,其中传统腹腔镜右半结肠癌根治术(CME/D3)患者120例(传统手术组),膜解剖腹腔镜右半结肠癌根治术(CME+D3)患者60例(膜解剖手术组),比较两组患者术后一般情况、术后并发症以及疗效。结果与传统手术组相比,膜解剖手术组减少了术中出血量[(79.3±16.7)ml比(103.6±20.8)ml,t=-3.894,P0.05)。中位随访时间36.7(5.3~48.7)个月,两组总体生存率差异无统计学意义(P>0.05),但两组无病生存率差异有统计学意义(χ^(2)=4.246,P=0.039)。结论基于膜解剖的腹腔镜右半结肠癌根治术(CME+D3)较传统腹腔镜右半结肠癌根治术(CME/D3)减少了术中出血量,提高了淋巴结清扫数量及标本质量,具有相同的手术安全性,并且有更高的1、3年无病生存率,肿瘤学治疗效果更好。

关键词：结肠肿瘤结肠系膜结肠切除术腹腔镜