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污水中十二烷基磺酸钠快速检测试纸的研制

现代化工 2024年第4期44卷 228-232页

作者：赵文青解清杰董进波王超林华星江苏大学环境与安全工程学院江苏镇江212013 江苏满江春城市规划设计研究有限责任公司江苏镇江212008

基于结晶紫与十二烷基磺酸钠在pH为7.00的缓冲溶液下发生反应,建立了一种十二烷基磺酸钠的快速检测试纸来判断污水中是否含有阴离子表面活性剂。结果发现,当浸渍1 mg/L结晶紫溶液的试纸和pH为7.00的缓冲溶液混合时(结晶紫溶液与缓冲溶... 详细信息

基于结晶紫与十二烷基磺酸钠在pH为7.00的缓冲溶液下发生反应,建立了一种十二烷基磺酸钠的快速检测试纸来判断污水中是否含有阴离子表面活性剂。结果发现,当浸渍1 mg/L结晶紫溶液的试纸和pH为7.00的缓冲溶液混合时(结晶紫溶液与缓冲溶体积比是3∶1)显色更明显;十二烷基磺酸钠浓度与显色深浅呈正比。该十二烷基磺酸钠检测试纸的检测最低值为0.05 mg/L,最高值为2 mg/L。配制样品测定结果的相对误差范围为1.167%~4.233%,表明该方法具有良好的准确性。

关键词：十二烷基磺酸钠结晶紫标准比色卡试纸检测试纸浸渍液

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纳米C-S-H-PCE对免蒸养高强混凝土性能的影响

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复合材料学报 2024年第1期41卷 333-347页

作者：付华王鹏刚田砾唐兴滨赵铁军青岛理工大学土木工程学院青岛266520 青岛市政集团砼业工程有限公司青岛266231

针对蒸汽养护易引起混凝土初始损伤及耐久性差等问题。本文采用纳米水化硅酸钙-聚羧酸醚复合材料(n-C-S-H-PCE)制备免蒸养高强混凝土。通过水化热、低场核磁等试验研究了n-C-S-H-PCE对混凝土抗压强度、水化速率、孔径分布、自收缩及耐... 详细信息

针对蒸汽养护易引起混凝土初始损伤及耐久性差等问题。本文采用纳米水化硅酸钙-聚羧酸醚复合材料(n-C-S-H-PCE)制备免蒸养高强混凝土。通过水化热、低场核磁等试验研究了n-C-S-H-PCE对混凝土抗压强度、水化速率、孔径分布、自收缩及耐久性的影响。结果表明:纳米水化硅酸钙(C-S-H)晶核为水化产物提供了成核位点,降低了成核的临界离子浓度K_(sp),诱导期和加速期显著提前,显著提高了混凝土早期抗压强度,1天混凝土抗压强度提高64%,且28天以后混凝土没有发生强度倒缩。掺入n-C-S-H-PCE后,混凝土基体孔径细化,凝胶孔和毛细孔比例均增加,导致混凝土自干燥过程中毛细孔负压增大,增大混凝土自收缩;然而,混凝土基体的最可几孔径和50~100 nm孔隙累计体积降低,提高了混凝土的抗氯离子侵蚀性能;孔径大于14 nm(临界孔径)的孔隙含量降低(由0.0287 mL/g降低到0.0156 mL/g),从而提高了混凝土的抗冻性能;此外,掺入n-C-S-H-PCE后,混凝土孔隙率降低,且随着矿粉掺量的增加,铝酸钙相和Ca2+的浓度降低,混凝土抗硫酸盐侵蚀能力提高。该研究为免蒸养、低收缩、高耐久、高强混凝土制备与应用提供了理论依据。

关键词：纳米早强剂免蒸养混凝土孔结构自收缩耐久性 C-S-H-PCE

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一种高效的软件模糊测试种子生成方法

西安电子科技大学学报 2024年第2期51卷 126-136页

作者：刘振岩张华刘勇杨立波王梦迪北京邮电大学网络与交换技术国家重点实验室北京100876 青岛科技大学信息科学技术学院山东青岛266061 国网河北省电力有限公司河北石家庄050000 国网河北省电力有限公司信息通信分公司河北石家庄050000

模糊测试技术作为当前软件工程领域用于挖掘漏洞的有效方式之一,其在发现软件潜在漏洞方面有着非常显著的效果。针对传统模糊测试技术中种子选择策略无法快速有效地生成高质量的种子集,导致变异生成的测试用例无法到达更深路径、触发更... 详细信息

模糊测试技术作为当前软件工程领域用于挖掘漏洞的有效方式之一,其在发现软件潜在漏洞方面有着非常显著的效果。针对传统模糊测试技术中种子选择策略无法快速有效地生成高质量的种子集,导致变异生成的测试用例无法到达更深路径、触发更多安全漏洞的问题,基于改进生成对抗网络(GAN)提出了一个种子生成方法以实现高效模糊测试。通过优化LeakGAN网络结构提高生成种子的质量和多样性,引入编解码技术实现灵活扩展生成种子的类型,并显著提高了在不同输入格式下目标程序的模糊测试性能。实验结果表明,采取的种子生成策略在覆盖率、触发唯一崩溃等指标上有明显提升,并有效地提高了种子生成速度。文中选择了6个具有不同高度结构化输入的开源程序和不同的模糊测试工具来验证策略的有效性,相较原策略分支覆盖率平均增长约2.79%,并且多发现了约10.35%的唯一路径以及约86.92%的唯一崩溃。

关键词：漏洞挖掘网络安全模糊测试深度学习

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A grapefruit microstructure fiber temperature sensor coated with liquid crystal based on waist-enlarged taper

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Optoelectronics Letters 2024年第3期20卷 142-146页

作者： wang Feng LI Jiaxuan ZHANG Rongjing FU Xinghu College of Mechanical and Electrical Engineering Hebei Normal University of Science&TechnologyQinhuangdao 066004China School of Information Science and Engineering Key Laboratory for Special Fiber and Fiber Sensor of Hebei ProvinceYanshan UniversityQinhuangdao 066004China

In this paper, a grapefruit microstructure fiber(GMF) temperature sensor coated with liquid crystal(LC) based on waist-enlarged taper is proposed and fabricated, and its temperature sensing characteristics are analyzed. The waist-enlarged taper is formed at the fusion point between single mode fiber(SMF) and GMF. The capillary glass tube is sleeved outside GMF, LC is filled into the capillary glass tube, and its two ends are finally sealed to form a sensor. The experimental results show that when the length of GMF is 2.5 cm, the temperature sensitivity of the sensor can reach up to 195.3 pm/℃ in the range of 30-90℃, and it has a good stability for reuse. Thereby, it can be used in biochemical, industrial production and other temperature detection areas.

关键词： capillary fiber microstructure

调谐多液柱阻尼器对浮式风机基础的减摇特性研究

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船舶力学 2024年第4期28卷 513-526页

作者：窦朋王志东凌宏杰徐晓森江苏科技大学船舶与海洋工程学院江苏镇江212003 江苏科技大学海洋装备研究院江苏镇江212003

建立调谐多液柱阻尼器(TLMCD)与浮式基础的缩尺模型,在水池内开展试验,研究规则波激励下TLMCD对浮式基础纵摇运动响应的控制效果;同时利用OpenFOAM建立数值模型并进行验证,从流场、水动力载荷、浮体运动姿态和阻尼力做功等方面,分析TLMC... 详细信息

建立调谐多液柱阻尼器(TLMCD)与浮式基础的缩尺模型,在水池内开展试验,研究规则波激励下TLMCD对浮式基础纵摇运动响应的控制效果;同时利用OpenFOAM建立数值模型并进行验证,从流场、水动力载荷、浮体运动姿态和阻尼力做功等方面,分析TLMCD与浮式基础耦合的作用机理。结果表明:TLMCD在共振激励下的减摇效果最佳,2%质量比的液体可以降低浮体在共振激励下最大纵摇响应的10.84%~18.53%,在0.9

关键词： TLMCD 浮式风机基础模型试验数值模拟

中空夹层钢管钢渣混凝土T形节点抗震性能研究

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振动工程学报 2024年第6期37卷 1023-1032页

作者：曾武华王伟陈庆熠王军芳吴应雄卓卫东三明学院建筑工程学院福建三明365004 工程结构智能建造与监控福建省高校重点实验室福建三明365004 同济大学土木工程防灾减灾全国重点实验室上海200092 福州大学土木工程学院福建福州350108

将钢渣混凝土灌入中空夹层钢管混凝土结构,充分利用钢渣混凝土的微膨胀性和中空夹层内外钢管对混凝土的约束作用,有效解决了钢渣混凝土工程应用中的安定性问题。以混凝土类型、空心率、支主管直径比和轴压比为参数变量,共进行了5个中空... 详细信息

将钢渣混凝土灌入中空夹层钢管混凝土结构,充分利用钢渣混凝土的微膨胀性和中空夹层内外钢管对混凝土的约束作用,有效解决了钢渣混凝土工程应用中的安定性问题。以混凝土类型、空心率、支主管直径比和轴压比为参数变量,共进行了5个中空夹层钢管混凝土T形节点试件(1个普通混凝土试件、4个钢渣混凝土试件)拟静力试验研究。试验结果表明:与灌注普通混凝土相比,灌注钢渣混凝土对试件节点承载力影响不大,但位移延性和耗能能力明显增加,提高幅度分别达69.46%和48.20%;当空心率从0.3增大到0.5时,试件位移延性系数提高9.69%;当支主管直径比从0.40增大到0.68时,位移延性系数提高82.44%;当轴压比从0.1增大到0.2时,试件位移延性系数降低17.98%。建立有限元模型对试件的滞回性能进行了模拟,模拟结果与试验结果基本符合,验证了所建有限元模型的有效性。进而开展了节点承载力影响参数分析,得到最佳空心率为70%左右。钢渣在钢管混凝土结构中应用,可大幅提高其抗震性能。

关键词：抗震性能:中空夹层钢管混凝土钢渣混凝土滞回特性拟静力试验

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Effect of exogenous additives on heavy metal passivation and nitrogen retention in pig manure composting

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Frontiers of Agricultural Science and Engineering 2024年第3期11卷 468-480页

作者： Ziqi wang Guotao SUN Jiamin wang Gongshe YANG College of Animal Science and Technology Northwest A&F University College of Horticulture Northwest A&F University

The widespread use of feed additives in intensive and large-scale pig farming has resulted in high levels of heavy metals in pig manure. The long-term application of organic fertilizers containing high levels of heavy metals leads to the accumulation of heavy metals in the soil, which not only causes heavy metal pollution in the soil, and also affect food safety and endanger human health. Composting is an economical and effective technical measures to achieve environmentally-sustainable treatment of pig manure and is a practical method to reduce the problem of heavy metals and to improve the resource value of pig manure. The composting process is accompanied by high temperatures and the production and emission of gases, and also lead to changes in the nitrogen content of the compost and provide opportunity for heavy metal passivation additives. This paper summarizes the forms and types of heavy metals present in pig manure and reviews the progress of research as well as the techniques and problems of in the composting process, and provides recommendations for research on heavy metal passivation and nitrogen retention in pig manure composting.

关键词： Additives composting heavy metals passivation nitrogen retention pig manure

Cryptococcus splenic abscess in primary biliary cholangitis: a case report

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World Journal of Emergency Medicine 2024年第4期15卷 319-321页

作者： Yuxin Dong Qing Tang Lijun wang Songtao Shou Department of Emergency Medicine Tianjin Medical University General HospitalTianjin 300052China

Chronic liver diseases,including primary biliary cholangitis(PBC),are recognized as immunosuppressive conditions due to the impaired functionality of hepatic sinusoidal Kupffer cells.[1]PBC is specifically characterized by cholangitis and progressive liver pathology,which may eventually lead to *** compromised liver function and reduced efficacy of Kupffer cells in patients with PBC weaken their cell-mediated immune responses,increasing their susceptibility to opportunistic pathogens such as Cryptococcus.[2]Cryptococcosis is an infectious disease caused by pathogenic encapsulated yeasts of the genus Cryptococcus,which is distributed worldwide and exhibits diverse clinical presentations.[3]Most case reports on cryptococcal infections are associated with HIV infection or other conditions that compromise the immune system.[4]Case reports related to primary biliary cholangitis are ***,this case report underscores a rare cryptococcal infection in a patient with primary biliary cholangitis,emphasizing the need to consider opportunistic infections in those with compromised liver function and immune dysregulation.

关键词： cholangitis impaired diseases

Preface to Special Topic on Integrated Circuits, Technologies and Applications

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Journal of Semiconductors 2024年第6期45卷 1-2页

作者： Zheng wang Xiaoyan Gui Lin Cheng Nanjian Wu School of Integrated Circuit Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China School of Microelectronics Xi’an Jiaotong UniversityXi’an 710049China School of Microelectronics University of Science and Technology of ChinaHefei 230026China Institute of Semiconductors Chinese Academy of SciencesBeijing 100083China

This Special Topic of the Journal of Semiconductors(JoS)features expanded versions of key articles presented at the 2023 IEEE International Conference on Integrated Circuits Technologies and Applications(ICTA),which was held in Hefei,Anhui,China,from October 27 to 29,*** ICTA is an IEEE flagship conference in the field of integrated circuits(IC)in China,which provides a communication platform for sharing the state-of-the-art techniques from experts in the field of *** the 93 papers presented at ICTA 2023,the Technical Program Committee and the Award Committee have selected 4 high-quality articles to recommend to the Special Topic of JoS,covering a wide range of technical fields,including one paper on RF ICs,two papers on Analog ICs and one paper on Wireline ICs.

关键词： communication ICT Anhui