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废弃流化催化裂化催化剂中重金属的赋存形态、浸出特性及其健康风险评价

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环境科学研究 2024年第8期37卷 1819-1828页

作者：邵幸瑞张先龙李子阳蔡蓓蓓王艳吴雪平陈亚中合肥工业大学化学与化工学院安徽合肥230009

随着炼油行业产生的废弃流化催化裂化催化剂(SFCCC)不断增加,含有大量重金属(主要是V、Fe、Ni和Sb)的SFCCC所造成的生态环境和人体健康风险已不容忽视。为分析SFCCC中重金属的污染特性,采用硫酸硝酸法和改进的BCR连续提取法分别对SFCCC... 详细信息

随着炼油行业产生的废弃流化催化裂化催化剂(SFCCC)不断增加,含有大量重金属(主要是V、Fe、Ni和Sb)的SFCCC所造成的生态环境和人体健康风险已不容忽视。为分析SFCCC中重金属的污染特性,采用硫酸硝酸法和改进的BCR连续提取法分别对SFCCC中重金属的浸出毒性和赋存形态进行研究,考察SFCCC粒径、浸出时间、pH和液固比等浸出条件对SFCCC中V、Fe、Ni和Sb浸出行为的影响,评价不同浸沥液环境下SFCCC对人体的健康风险。结果表明:①SFCCC中V的浸出浓度为4.955 mg/L,高于美国通用处理标准(UTS)的限定值(0.2 mg/L),具有浸出毒性。②V、Fe、Ni和Sb四种重金属主要以残渣态的形式存在,V的弱酸提取态和可还原态含量均高于其他3种重金属,环境迁移能力最强。③V的浸出浓度与SFCCC的粒径成正比,Fe、Ni和Sb的浸出浓度均与SFCCC的粒径成反比;4种重金属浸出浓度均与时间成正比,其中V显示出更长的浸出周期;酸性环境促进重金属的浸出,而V和Sb在强碱性环境下也容易浸出;4种重金属的浸出浓度均随液固比的增加呈现先上升后下降的趋势,并最终达到平衡。④健康风险评价结果表明,SFCCC在地表水、酸雨和垃圾渗滤液浸沥环境下的非致癌风险值(HQ)均大于1,对人体存在较高的非致癌风险。其中Sb在3种浸沥液环境下的HQ分别为2.264、1.637和1.744,是主要的非致癌风险元素。因此需要对SFCCC进行固化处置,限制重金属的溶出,减少其对环境和人体的危害。

关键词：废弃流化催化裂化催化剂重金属浸出特性赋存形态健康风险评价

三端直流系统电压控制策略分析及测量异常故障定位方法研究

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自动化应用 2023年第17期64卷 166-169页

作者：李东阳吴梓阳赵猛韩丰收郑星星中国南方电网超高压输电公司广州局广东广州510405

鉴于南网各回直流曾多次发生直流电压测量异常故障,本文以禄高肇三端直流系统为例,着重介绍直流电压控制策略,并采用RTDS仿真系统对直流电压测量异常进行仿真,分析电压测量异常时控制系统的响应情况,通过大量的仿真研究,全面梳理了直流... 详细信息

鉴于南网各回直流曾多次发生直流电压测量异常故障,本文以禄高肇三端直流系统为例,着重介绍直流电压控制策略,并采用RTDS仿真系统对直流电压测量异常进行仿真,分析电压测量异常时控制系统的响应情况,通过大量的仿真研究,全面梳理了直流电压控制响应策略,总结了电压测量异常时的故障现象及处置方法,对现场运维工作具有一定的指导价值。

关键词：高压直流控制系统触发角熄弧角定电压控制

Synthesis of C_f/TiAl_3 Composite by Infiltration-In Situ Reaction

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Journal of Materials Science & Technology 2009年第6期25卷 803-806页

作者： Yanmei Liu ziyang Xiu Yongliang Guo Longtao Jiang Wensu Yang Gaohui wu School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China Research Academy of Science and Industry Technology Harbin Institute of Technology Harbin 150001 China Analysis and Measurement Center Harbin Institute of Technology Harbin 150001 China

Infiltration-in situ reaction synthesis of Cf/TiAl3 composite was investigated. The as-cast material was obtained by titanium particles, carbon fibers and pure aluminum. Titanium particles and carbon fibers were mixed and pressed to form a preform firstly, and then molten pure aluminum was pressed into the preform, subsequently, cooled rapidly. In situ reaction samples were obtained by heating the as-cast material from 600 to 1000℃ for I h. The microstructural evolution of in situ reaction samples was analyzed by scanning electron microscopy and energy dispersive X-ray. In addition, the phase composition of products was inspected by X-ray diffraction. Experimental results showed that the dominant product of TiAl3 and a small amount of Al4C3 were formed at low temperature. While TiAl3 was not stable at high temperature, along with its decrease, TiC phase became favorable. In the final products, TiAl3, TiC and Al4C3 were detected. Thus, the in situ reaction for Ti-Al-C system composite proceeded a formed-decomposed-precipitated mechanism.

关键词： Composites Ti-Al Intermetallics In situ reaction Microstructure

梓醇对肝肺综合征大鼠肝肺损伤的保护作用研究

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陆军军医大学学报 2024年第6期46卷 587-596页

作者：曾子洋雷雨豪吴宪锋宋艾璘杨纯勇杨智勇李雨捷易斌陆军军医大学(第三军医大学)第一附属医院麻醉科重庆400038 重庆市中医院麻醉科重庆400021

目的探索梓醇通过增强TGR5表达和降低肝胆汁酸水平对胆总管结扎术(CBDL)大鼠肺损伤的保护作用。方法将大鼠随机分为三组[Sham组、CBDL组和梓醇(Catalpol)组],评估生存率、动脉血氧分压(PO2)和肺泡-动脉血氧分压差P(A-a)O2、肝功能、... 详细信息

目的探索梓醇通过增强TGR5表达和降低肝胆汁酸水平对胆总管结扎术(CBDL)大鼠肺损伤的保护作用。方法将大鼠随机分为三组[Sham组、CBDL组和梓醇(Catalpol)组],评估生存率、动脉血氧分压(PO2)和肺泡-动脉血氧分压差P(A-a)O2、肝功能、肝肺组织病理变化差异;进一步分析胆汁酸表达水平和TGR5的关系以及相关机制。结果梓醇治疗改善CBDL导致的肝功能损伤,提高CBDL的生存率和改善了低氧血症;减少了肝、肺血管新生。同时,梓醇通过增强TGR5和降低FXR的表达,减轻BAs水平过高引起肺损伤。结论梓醇通过上调TGR5和降低FXR的表达,改善BAs水平过高引起的肺损伤,发挥对CBDL大鼠的肝肺保护作用。

关键词：肝肺综合征(HPS) 梓醇 TGR5 BAs

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配电自动化技术在智能电网中的应用

集成电路应用 2024年第5期41卷 310-311页

作者：丁浩王子杨吴浩天欧歌江苏省南京市国网江北新区供电公司江苏210032

阐述智能配电网与配电自动化的关系、配电自动化系统的特点。分析自动化控制技术的应用,包括共享系统内网络资源、对电力系统科学规划、加强力度的配合,并探讨技术应用的发展趋势。

关键词：配电系统自动化技术智能配电网

Research progress in interface modification and thermal conduction behavior of diamond/metal composites

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International Journal of Minerals,Metallurgy and Materials 2022年第2期29卷 200-211页

作者： Ping Zhu Pingping Wang Puzhen Shao Xiu Lin ziyang Xiu Qiang Zhang Equo Kobayashi Gaohui wu School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology School of Material Science and EngineeringHarbin Institute of TechnologyHarbin 150001China Industrial Technology Research Institute of Heilongjiang Province Harbin 150001China Department of Materials Science and Engineering Tokyo Institute of TechnologyTokyo 152-8550Japan

Diamond/metal composites are widely used in aerospace and electronic packaging fields due to their outstanding high thermal conductivity and low ***,the difference in chemical properties leads to interface incompatibility between diamond and metal,which has a considerable impact on the performance of the *** improve the interface compatibility between diamond and metal,it is necessary to modify the interface of *** paper reviews the experimental research on interface modification and the application of computational simulation in diamond/metal *** computational simulation with experimental methods is a promising way to promote diamond/metal composite interface modification research.

关键词： diamond/metal interface modification thermal conductivity computational simulation

Small G Rac1 is involved in replication cycle of dengue serotype 2 virus in EAhy926 cells via the regulation of actin cytoskeleton

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Science China(Life Sciences) 2016年第5期59卷 487-494页

作者： Jing Zhang Na wu Na Gao Wenli Yan ziyang Sheng Dongying Fan Jing An Department of Microbiology School of Basic Medical Sciences Capital Medical University Beijing 100069 China Center of Epilepsy Beijing Institute for Brain Disorders Beijing 100069 China

Bleeding is a clinical characteristic of severe dengue and may be due to increased vascular permeability. However, the patho- genesis of severe dengue remains unclear. In this study, we showed that the Racl-microfilament signal pathway was involved in the process of DENV serotype 2 （DENV2） infection in EAhy926 cells. DENV2 infection induced dynamic changes in actin organization, and treatment with Cytochalasin D or Jasplakinolide disrupted microfilament dynamics, reduced DENV2 entry, and inhibited DENV2 assembly and maturation. Racl activities decreased during the early phase and gradually increased by the late phase of infection. Expression of the dominant-negative form of Racl promoted DENV2 entry but inhibited viral as- sembly, maturation and release. Our findings demonstrated that Racl plays an important role in the DENV2 life cycle by reg- ulating actin reorganization in EAhy926 cells. This finding provides further insight into the pathogenesis of severe dengue.

关键词： dengue virus small Rho GTPase Racl actin vascular endothelial cells

Microstructure and Mechanical Properties of 45 vol.%SiC_p/7075Al Composite

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Journal of Materials Science & Technology 2015年第9期31卷 930-934页

作者： ziyang Xiu Wenshu Yang Ronghua Dong Murid Hussain Longtao Jiang YongXing Liu Gaohui wu State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Department of Material Science and Engineering Harbin Institute of Technology Department of Chemical Engineering COMSATS Institute of Information Technology

Microstructure and mechanical behavior of high volume content SiCp/7xxxAl composites have not been explored yet. Therefore, in the present work, 45 vol.% SiCp/7075Al composite has been prepared by pres- sure infiltration method. High density dislocations were found around SiC/Al interface in SiCp/7075Al composite after water-quenching and aging treatment. Fine dispersed nano-η＇ phases were observed after the aging treatment. Adverse to other SiCp/Al composites prepared by the pressure infiltration method, an interface layer was observed between SiC particles and AI matrix. Furthermore, high-resolution trans- mission electron microscopy （HRTEM） observation indicated that this interface layer was coherent/semi- coherent with that of the SiC particles. 45 vol.% SiCp/7075Al composite demonstrated high tensile strength （630 MPa） and micro-ductility. Compared to aged SiCp/2024Al composite, the aged SiCp/7075Al com- posite showed an increase of about 200% in the tensile strain and 90% in the tensile strength, respectively. It is speculated that nano-η＇ phases in the Al matrix significantly contributed to the strengthening effect while the interface layer between SiC and AI matrix might be beneficial to the strength and plasticity of SiCp/7075Al composite.

关键词： Metal matrix composite7075Al InterfaceNano precipitationMechanical properties

Towards V2I Age-Aware Fairness Access: A DQN Based Intelligent Vehicular Node Training and Test Method

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Chinese Journal of Electronics 2023年第6期32卷 1230-1244页

作者： wu Qiong SHI Shuai WAN ziyang FAN Qiang FAN Pingyi ZHANG Cui School of Internet of Things Engineering Jiangnan University State Key Laboratory of Integrated Services Networks Xidian University Qualcomm Beijing National Research Center for Information Science and Technology Tsinghua University Banma Network Technology Co. Ltd.

Vehicles on the road exchange data with base station frequently through vehicle to infrastructure(V2I) communications to ensure the normal use of vehicular applications, where the IEEE 802.11 distributed coordination function is employed to allocate a minimum contention window(MCW) for channel access. Each vehicle may change its MCW to achieve more access opportunities at the expense of others, which results in unfair communication performance. Moreover, the key access parameter MCW is privacy information and each vehicle is not willing to share it with other vehicles. In this uncertain setting, age of information(Ao I), which measures the freshness of data and is closely related with fairness, has become an important communication *** this basis, we design an intelligent vehicular node to learn the dynamic environment and predict the optimal MCW, which can make the intelligent node achieve age fairness. In order to allocate the optimal MCW for the vehicular node, we employ a learning algorithm to make a desirable decision by learning from replay history data. In particular, the algorithm is proposed by extending the traditional deep-Q-learning(DQN) training and testing method. Finally, by comparing with other methods, it is proved that the proposed DQN method can significantly improve the age fairness of the intelligent node.

关键词： Training Privacy Heuristic algorithms Vehicle-to-infrastructure Roads Measurement uncertainty Prediction algorithms