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Journal of Iron and Steel Research International 2023年第2期30卷 338-349页

作者： Xin Zhu Cheng-bin shi shi-jun Wang Peng Lan Jing Li State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing(USTB)Beijing100083China School of Metallurgical and Ecological Engineering University of Science and Technology Beijing(USTB)Beijing100083China

The dendrites,eutectic carbides,Laves phase and microsegregation of alloying element in electroslag remelted 15Cr-22Ni-1Nb austenitic heat-resistant steel with varying cerium contents were *** liquidus and solidus temperatures of the steel were determined to reveal the effect of cerium on solidification temperature interval and local solidification time of the *** secondary dendrite arm spacing decreases from 57.10 to 40.18μm with increasing the cerium content from 0 to 0.0630 wt.%.The eutectic NbC and Laves phase in as-cast ingots exhibit blocky and honeycomb morphology,*** area fractions and sizes of eutectic NbC and Laves phase in as-cast ingots decrease with the increase in cerium *** atomic percentage of Laves phase-forming element(Ni,Nb,Cr,Mo and Si)decreases with the increase in cerium content of the *** microsegregation of Mo,Ni,Si,Cr and Nb decreases with increasing the cerium content,which is favorable to reducing both the amount and sizes of eutectic NbC and Laves phase in as-cast *** solidification temperature interval and local solidification time of the steel decrease as the cerium content is increased from 0 to 0.0630 wt.%,which inhibits the growth of dendrites,eutectic NbC and Laves phase.

关键词： Heat-resistant steel Rare earth cerium Eutectic NbC Laves phase Microsegregation Solidification characteristics

创新驱动绿色循环产业高质量发展策略探究与实践

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安徽农业科学 2024年第13期52卷 219-221页

作者：袁合涛陈世斌安康学院陕南生态经济研究中心陕西安康725000 旬阳市博物馆陕西旬阳725700

以汉江生态经济带绿色发展先行区陕西安康为例,对绿色循环产业发展现状进行分析,揭示创新驱动绿色循环产业发展存在的主要问题,从“两链”深度融合、科技创新园区、科技成果转化、科技金融融合、科技创新供给等方面探索创新驱动绿色循... 详细信息

以汉江生态经济带绿色发展先行区陕西安康为例,对绿色循环产业发展现状进行分析,揭示创新驱动绿色循环产业发展存在的主要问题,从“两链”深度融合、科技创新园区、科技成果转化、科技金融融合、科技创新供给等方面探索创新驱动绿色循环产业高质量发展策略,旨在为促进同类区域实现经济高质量发展和生态高水平保护提供参考意见和政策启示。

关键词：创新驱动绿色循环产业高质量发展

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边坡全维度监测技术与模型试验研究

高校地质学报 2024年第2期30卷 207-217页

作者：程刚张昊宇朱鸿鹄施斌吴静红华北科技学院(中国煤矿安全技术培训中心)计算机学院北京101601 南京大学地球科学与工程学院南京210023 苏州科技大学土木工程学院苏州215011 长安大学生态地质与灾害防控自然资源部重点实验室西安710054

中国是世界上地质灾害最严重的国家之一,其中滑坡常年位于各类地质灾害首位,因此对滑坡灾害进行深层次的研究至关重要。边坡工程常常会受到人类工程活动与自然地质作用叠加效应的影响,从而增加了对边坡变形失稳机理的科学认知难度。为... 详细信息

中国是世界上地质灾害最严重的国家之一,其中滑坡常年位于各类地质灾害首位,因此对滑坡灾害进行深层次的研究至关重要。边坡工程常常会受到人类工程活动与自然地质作用叠加效应的影响,从而增加了对边坡变形失稳机理的科学认知难度。为精准掌握边坡状态信息与变形失稳过程,可通过建立全维度的监测体系以实现边坡状态信息的动态解译与表征,据此获得更加精准、可靠、直观的边坡稳定性评价依据。文章围绕边坡破坏模式及典型边坡监测技术,在厘清边坡变形演化过程的基础上,对边坡“天—空—地—体”一体化监测技术体系进行了全面分析;概述性总结了基于DFOS的边坡监测技术,重点阐述了基于DFOS的边坡多源多场监测研究思路与实施路径;系统性梳理了基于典型监测技术与DFOS技术的边坡物理模型试验研究过程与结果,以期为开展边坡加固方案设计与防灾减灾控灾提供重要的参考依据。

关键词：边坡破坏模式 “天—空—地—体”全维度监测技术分布式光纤感测技术多源多场模型试验

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浮球覆盖下水面能量平衡再建与蒸发模型研究

长江科学院院报 2024年第3期41卷 22-29页

作者：徐思远严新军王海涛侍克斌新疆农业大学水利与土木工程学院乌鲁木齐830052 新疆水利工程安全与水灾害防治重点实验室乌鲁木齐830052

针对干旱区平原水库蒸发强烈导致水资源利用率低的问题,选用黑色高密度聚乙烯(HDPE)浮球作为干旱区平原水库节水材料。通过理论分析、建模与室外试验三者结合,对完整非冰冻期内浮球覆盖下水面蒸发、水体能量平衡组分变化分布的响应机理... 详细信息

针对干旱区平原水库蒸发强烈导致水资源利用率低的问题,选用黑色高密度聚乙烯(HDPE)浮球作为干旱区平原水库节水材料。通过理论分析、建模与室外试验三者结合,对完整非冰冻期内浮球覆盖下水面蒸发、水体能量平衡组分变化分布的响应机理进行研究,并在此基础上建立相应的水面蒸发量计算模型。结果显示:相较于自由水面,73%的浮球覆盖率下的整体水面净辐射吸收率减小约12.6%,其月均蒸发所需潜热通量减少了61.8%,约为148.73 W/m^(2),水体的感热通量和蓄热通量也有较大的变化。通过对彭曼模型的能量项和空气动力项进行修正,建立的覆盖条件下的水面蒸发量计算模型具有较高的精度。

关键词：浮球节水材料能量平衡蒸发模型水资源利用率

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远程动态可重构遥测加密发射机的设计与实现

遥测遥控 2024年第4期45卷 81-88页

作者：石彬高宁周庭伊 92941部队44分队葫芦岛125000 北京遥测技术研究所北京100076

近年来,随着我国航天器新型号的发展及国产化进程的推进,综合考虑高度集成化、远程动态可重构的遥测设备需求,研制兼容多调制体制的远程动态可重构遥测加密发射机是研制遥测传输设备的必然趋势。区别于传统发射机基带软件架构的FPGA+DA... 详细信息

近年来,随着我国航天器新型号的发展及国产化进程的推进,综合考虑高度集成化、远程动态可重构的遥测设备需求,研制兼容多调制体制的远程动态可重构遥测加密发射机是研制遥测传输设备的必然趋势。区别于传统发射机基带软件架构的FPGA+DA+信道方式,该发射机架构由异构多核FMQL(可编程芯片)嵌入式系统+射频集成芯片B9361组成发射机基带组成,结合软件实现远程动态可重构、上电自检、工作状态巡检、工作状态实时上报功能,提高了测量系统集成度,最大程度地实现软硬件资源的重构和共享,也大幅度缩减了系统体积、重量、功耗和成本。本方案基于通用化、系列化、组合化的设计思想,使发射机产品具备高度集成化、元器件自主可控、通用化平台、软件灵活配置等优点,为新一代遥测发射机向通用化、高性能、动态可重构方向发展提供有力的技术支撑。

关键词：动态可重构遥测发射机 B9361

Effects of oxidants on the degradation of tributyl phosphate under supercritical water oxidation conditions

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Nuclear Science and Techniques 2022年第3期33卷 160-171页

作者： Qiang Qin Xiao-bin Xia shi-bin Li Shuai Wang Hong-Jun Ma Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China

The effects of additional oxidants,such as NaNO_(3),Na_(2)S_(2)O_(3),KClO_(4),and K_(2)Cr_(2)O_(7),on the supercritical water oxidation(SCWO)of tributyl phosphate(TBP)were *** coupling of an ionic oxidant with SCWO can effectively enhance the oxidative degradation ability of the system,thus increasing its organic-matter-removal efficiency at a reduced reaction ***,the addition of NaNO_(3),KClO_(4),or K_(2)Cr_(2)O_(7)could improve this efficiency at a reaction temperature of 500℃compared with that of the original system at 550℃.Additionally,based on the conditions adopted in this study,the addition of either of these oxidants could reduce the final total organic carbon(TOC)of the effluent from~500 to99%.The effects of the ionic oxidants on the gas products,including CO_(2),CO,H_(2),and CH_(4),as well as other organic gases,have also been *** these gas products,CO_(2)accounted for the main gas product with a proportion of more than ***<500℃,temperature significantly affected the as products(CO,H_(2),CH_(4),and other organic gases).However,the gas product was mainly CO_(2)when the temperature was increased to≥500℃.This study initially revealed the enhancement effect of ionic oxidants on SCWO,which still requires further research.

关键词： Supercritical water oxidation Ionic oxidant Organic wastes

Decomposition of oil cleaning agents from nuclear power plants by supercritical water oxidation

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Nuclear Science and Techniques 2022年第4期33卷 83-95页

作者： shi-bin Li Xiao-bin Xia Qiang Qin Shuai Wang Hong-Jun Ma Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China

Oil cleaning agents generated from nuclear power plants(NPPs)are radioactive organic liquid *** date,because there are no satisfactory industrial treatment measures,these wastes can only be stored for a long *** this work,the optimization for the supercritical water oxidation(SCWO)of the spent organic solvent was *** main process parameters of DURSET(oil cleaning agent)SCWO,such as temperature,reaction time,and excess oxygen coefficient,were optimized using response surface methodology,and a quadratic polynomial model was *** determination coefficient(R^(2))of the model is 0.9812,indicating that the model is *** optimized process conditions were at 515 C,66 s,and an excess oxygen coefficient of 211%.Under these conditions,the chemical oxygen demand removal of organic matter could reach 99.5%.The temperature was found to be the main factor affecting the SCWO *** and benzene-based compounds may be the main intermediates in DURSET *** work provides basic data for the industrialization of the degradation of spent organic solvents from NPP using SCWO technology.

关键词： Supercritical water oxidation Oil cleaning agent Nuclear power plants Response surface methodology

Rule-based scheduling of multi-stage multi-product batch plants with parallel units

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Chinese Journal of Chemical Engineering 2017年第8期25卷 1022-1036页

作者： bin shi Xinrui Qian Shanshan Sun Liexiang Yan Department of Chemical Engineering Wuhan University of Technology

A novel rule-based model for multi-stage multi-product scheduling problem(MMSP)in batch plants with parallel units is *** scheduling problem is decomposed into two sub-problems of order assignment and order ***,hierarchical scheduling strategy is presented for solving the former sub-problem,where the multi-stage multi-product batch process is divided into multiple sequentially connected single process stages,and then the production of orders are arranged in each single stage by using forward order assignment strategy and backward order assignment strategy respectively according to the feature of scheduling ***-up competition algorithm(LCA)is presented to find out optimal order sequence and order assignment rule,which can minimize total flow time or maximize total weighted process *** results show that the proposed approach can obtain better solutions than those of the literature for all scheduling problems with more than 10 ***,with the problem size increasing,the solutions obtained by the proposed approach are improved *** proposed approach has the potential to solve large size MMSP.

关键词： Line-up competition algorithm Order assignment role Multi-stage multi-product Parallel unit Scheduling optimization

呼吸科无创机械通气老年患者医院获得性肺炎的致病菌分布及影响因素分析

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中国消毒学杂志 2024年第1期41卷 41-43,46页

作者：金亮施斌孙旺远南京鼓楼医院集团宿迁医院江苏宿迁223800 徐州医科大学附属宿迁医院

目的明确呼吸科无创机械通气老年患者医院获得性肺炎的致病菌分布及危险因素。方法选取某医院呼吸科无创机械通气治疗的493例老年患者为研究对象,统计并分析呼吸科无创机械通气老年患者的医院获得性肺炎的发生情况、致病菌分布及发生医... 详细信息

目的明确呼吸科无创机械通气老年患者医院获得性肺炎的致病菌分布及危险因素。方法选取某医院呼吸科无创机械通气治疗的493例老年患者为研究对象,统计并分析呼吸科无创机械通气老年患者的医院获得性肺炎的发生情况、致病菌分布及发生医院获得性肺炎的危险因素。结果呼吸科的493例无创机械通气老年患者,有38例(7.71%)罹患医院获得性肺炎,共检出了53株致病菌,革兰阴性菌、革兰阳性菌与真菌分别有31株(58.49%)、15株(28.30%)和7株(13.21%)。多因素logistic分析结果筛选出呼吸科无创机械通气老年患者医院获得性肺炎的危险因素包括年龄≥75岁、意识不清醒、合并吞咽困难、合并低蛋白血症、反流误吸、使用无创呼吸机时间≥7 d、呼吸机回路的更换频率≥5 d/次,以及使用广谱抗菌药物。结论呼吸科无创机械通气老年患者医院获得性肺炎的发生率较高,主要病原菌为革兰阴性菌,真菌也占有一定比例,其影响因素较多,应引起呼吸科医生的关注。

关键词：呼吸科无创机械通气医院获得性肺炎致病菌影响因素

Eutectic precipitates and microstructure of electroslag remelted 15Cr-22Ni austenitic heat-resistant steel with varying Nb contents

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Journal of Iron and Steel Research International 2022年第11期29卷 1823-1835页

作者： Hao-chi Xu Cheng-bin shi Xin Zhu shi-jun Wang Jing Li shi-zhou Wang State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing(USTB)Beijing 100083China

The microstructure,eutectic carbides and intermetallic compounds in as-cast ingots with varying Nb contents produced by electroslag remelting were *** solidification behavior,microsegregation of alloying elements and its influence on precipitates were *** increase in Nb content from 0.64 to 1.40 wt.%has no effect on the dendrite morphology and secondary dendrite arm *** total area fraction of eutectic NbC and Laves phase in as-cast ingots increases with the increase in Nb *** eutectic precipitates in the ingot with 0.64 wt.%Nb are mainly NbC,and the others are Fe_(2)Nb-type Laves *** the Nb content of the steel significantly promotes the precipitation of Laves phases and lowers the precipitation temperature of NbC eutectic *** carbide M_(2)C is precipitated only in the ingot with 1.4 wt.%*** average concentration of Nb in both interdendritic and intragranular regions increases with the increase in Nb content of the steel,leading to a change in the morphology of Fe_(2)Nb-type Laves phase from honeycomb to *** the Nb content exerts little effect on the microsegregation degrees of Si,Mo,Cr and Ni in the steel.

关键词： Eutectic carbides Fe2Nb-type Laves phase Austenitic heat-resistant steel Microsegregation Electroslag remelting