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矿物填料对水性超薄型防火涂料性能的影响

太原理工大学学报 2024年第3期55卷 503-512页

作者：戴旭泽郭春丽郝海东曹守发马建超太原理工大学材料科学与工程学院学院太原030024 太原理工大学矿业工程学院太原030024

【目的】研究不同矿物填料及其复配比例对水性超薄型防火涂料性能的影响。【方法】以水性环氧/纯丙复配乳液作成膜物质;聚磷酸铵、季戊四醇、三聚氰胺作膨胀体系;钛白粉(TiO_(2))、煤矸石(CG)、膨润土(BT)、水滑石(LDH)作矿物填料进行了... 详细信息

【目的】研究不同矿物填料及其复配比例对水性超薄型防火涂料性能的影响。【方法】以水性环氧/纯丙复配乳液作成膜物质;聚磷酸铵、季戊四醇、三聚氰胺作膨胀体系;钛白粉(TiO_(2))、煤矸石(CG)、膨润土(BT)、水滑石(LDH)作矿物填料进行了XRF、TG、FTIR和SEM分析。【结果】结果显示:单一矿物填料的防火性能由强到弱排序为TiO_(2),CG,BT,LDH.单一TiO_(2)填料防火涂料燃烧80min炭层膨胀倍率达到13.6,钢板背温为274.9℃,其炭层结构存在强度弱的问题。复配矿物填料能够达到高效防火、节能低耗、经济环保的目标,同时为矿物填料的高值化利用提供了一种新途径。当TiO_(2)、BT、LDH复配质量比为6∶2∶2时,燃烧炭层膨胀倍率为14.9,钢板背温仅为268.8℃;TiO_(2)、BT、CG复配质量比为8∶1∶1时,膨胀倍率为14.5,钢板背温仅为261.0℃,防火性能优于单一矿物填料。扫描电镜观测发现,BT、CG和LDH的加入使炭层表面结构更致密,结构更坚固。红外光谱分析可知,炭层的残留物中存在磷化物和金属氧化物,炭层结构强度增强。热重分析两种防火涂料的残炭量依次为36.35%、36.92%,炭层热屏蔽性能提高。

关键词：水性超薄型防火涂料矿物填料膨胀倍率钢板背温煤矸石

内分泌治疗绝经后乳腺癌继发骨质疏松症的研究进展

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中国骨质疏松杂志 2024年第2期30卷 234-239页

作者：蒋召磊刘春慧马建超沈卓睿李彦宾白涵睿内蒙古医科大学中医学院内蒙古呼和浩特010110

内分泌治疗绝经后乳腺癌继发骨质疏松症是亟待解决的全球公共卫生问题之一。绝经后乳腺癌与骨质疏松症密切相关。对于绝经后乳腺癌患者,西医多用内分泌治疗药物中的芳香化酶抑制剂,虽然能有效控制雌激素水平,提高生存率,但是会增加骨质... 详细信息

内分泌治疗绝经后乳腺癌继发骨质疏松症是亟待解决的全球公共卫生问题之一。绝经后乳腺癌与骨质疏松症密切相关。对于绝经后乳腺癌患者,西医多用内分泌治疗药物中的芳香化酶抑制剂,虽然能有效控制雌激素水平,提高生存率,但是会增加骨质疏松症、骨折发生的风险。因此,很有必要进行相关骨检测。对于骨质疏松症,西医药物治疗多用双膦酸盐类,短期疗效较为满意,但存在时间限制,不能长期应用。西医非药物治疗以调整生活方式为主。中医治疗本病的内治法,多从肝、脾、肾论治,能提高骨密度,减轻骨痛等症状,降低骨折的风险,疗效较为显著,副作用较少。中医外治法采用针灸、穴位埋线、穴位贴敷等疗法。本文从中西医两方面对内分泌治疗绝经后乳腺癌继发骨质疏松症的研究进展进行综述,以期在中西医防治本病方面取得更好的进展,为临床和科研提供更多的依据。

关键词：内分泌治疗绝经后乳腺癌骨质疏松症研究进展

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真空碳酸钾脱硫工艺在首钢京唐的应用与实践

燃料与化工 2024年第4期55卷 36-36,37-39,50页

作者：钱旦马建超张珂旭赵虎中冶焦耐(大连)工程技术有限公司大连116085 辽宁省低碳焦化专业技术创新中心大连116085 首钢京唐西山焦化有限责任公司唐山063200

依托首钢焦化公司的焦炉煤气真空碳酸钾脱硫工艺,介绍了该工艺的流程及主要生产设备。根据已有生产经验,在工程设计和建设阶段进行工艺流程的改进。同时结合实际的生产情况,分析影响脱硫效率的因素,从而优化操作参数,使塔后硫化氢浓度... 详细信息

依托首钢焦化公司的焦炉煤气真空碳酸钾脱硫工艺,介绍了该工艺的流程及主要生产设备。根据已有生产经验,在工程设计和建设阶段进行工艺流程的改进。同时结合实际的生产情况,分析影响脱硫效率的因素,从而优化操作参数,使塔后硫化氢浓度保持在200 mg/m^(3)以下。

关键词：真空碳酸钾脱硫效率工艺改进

SWRH72BCr钢连铸坯表层网状渗碳体的形成和预防

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上海金属 2024年第1期46卷 62-69页

作者：李强张康晖马建超文光华周健韩富年江苏省(沙钢)钢铁研究院炼钢连铸研究室江苏张家港215625 重庆大学材料科学与工程学院重庆400044

SWRH72BCr钢连铸坯表面常常发现有异常振痕的部位表层有网状渗碳体。研究了网状渗碳体的形成原因。结果表明:保护渣液渣层偏薄且厚度不均匀、结晶器振动装置偏振量大是连铸坯表层形成异常振痕的主要原因。通过优化保护渣成分,将保护渣... 详细信息

SWRH72BCr钢连铸坯表面常常发现有异常振痕的部位表层有网状渗碳体。研究了网状渗碳体的形成原因。结果表明:保护渣液渣层偏薄且厚度不均匀、结晶器振动装置偏振量大是连铸坯表层形成异常振痕的主要原因。通过优化保护渣成分,将保护渣加渣间隔时间从30 s调整为23 s,结晶器偏振量从0.25 mm减小到0.10 mm,表面有异常振痕的SWRH72BCr钢连铸坯的百分率从7.24%降低到了0.15%,表层有网状渗碳体的连铸坯百分率从1.31%降低到了0.10%。

关键词： SWRH72BCr钢网状渗碳体振痕保护渣偏振量

major episodes of horizontal gene transfer drove the evolution of land plants

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Molecular Plant 2022年第5期15卷 857-871页

作者： jianchao ma Shuanghua Wang Xiaojing Zhu Guiling Sun Guanxiao Chang Linhong Li Xiangyang Hu Shouzhou Zhang Yun Zhou Chun-Peng Song Jinling Huang State Key Laboratory of Crop Stress Adaptation and Improvement School of Life SciencesHenan UniversityKaifeng 475004China Key Laboratory for Plant Diversity and Biogeography of East Asia Yunnan Key Laboratory for Fungal Diversity and Green DevelopmentKunming Institute of BotanyChinese Academy of SciencesKunming 650201China Department of Entomology China Agricultural UniversityBeijing 100193China Shanghai Key Laboratory of Bio-Energy Crops School of Life SciencesShanghai UniversityShanghai 200444China Fairy Lake Botanical Garden Shenzhen&Chinese Academy of SciencesShenzhen 518004China Department of Biology East Carolina UniversityGreenvilleNC 27858USA

How horizontal gene transfer(HGT)has contributed to the evolution of animals and plants remains a major *** recent progress,defining the overall scale and pattern of HGT events in land plants has been largely *** this study,we performed systematic analyses for acquired genes in different plant groups and throughout land plant *** found that relatively recent HGT events occurred in char-ophytes and all major land plant groups,but their frequency declined rapidly in seed *** major ep-isodes of HGT events occurred in land plant evolution,corresponding to the early evolution of strepto-phytes and the origin of land plants,***,a vast majority of the genes acquired in the two episodes have been retained in descendant groups,affecting numerous activities and processes of land *** analyzed some of the acquired genes involved in stress responses,ion and metabolite transport,growth and development,and specialized metabolism,and further assessed the cumulative ef-fects of HGT in land plants.

关键词： plant evolution adaptation streptophytes cumulative effect stress response growth and development

User space transformation in deep learning based recommendation

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Journal of Systems Engineering and Electronics 2020年第4期31卷 674-684页

作者： WU Caihua ma jianchao ZHANG Xiuwei XIE Dang Radar Non-Commissioned Officer School Air Force Early Warning AcademyWuhan 430345China

Deep learning based recommendation methods, such as the recurrent neural network based recommendation method(RNNRec) and the gated recurrent unit(GRU) based recommendation method(GRURec), are proposed to solve the problem of time heterogeneous feedback recommendation. These methods out-perform several state-of-the-art methods. However, in RNNRec and GRURec, action vectors and item vectors are shared among users. The different meanings of the same action for different users are not considered. Similarly, different user preference for the same item is also ignored. To address this problem, the models of RNNRec and GRURec are modified in this paper. In the proposed methods, action vectors and item vectors are transformed into the user space for each user firstly, and then the transformed vectors are fed into the original neural networks of RNNRec and GRURec. The transformed action vectors and item vectors represent the user specified meaning of actions and the preference for items, which makes the proposed method obtain more accurate recommendation results. The experimental results on two real-life datasets indicate that the proposed method outperforms RNNRec and GRURec as well as other state-of-the-art approaches in most cases.

关键词： recommender system collaborative filtering time heterogeneous feedback recurrent neural network gated recurrent unit(GRU) user space transformation

继发性甲状旁腺功能亢进患者甲状旁腺切除术后高钾血症的影响因素及其风险预测模型

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肾脏病与透析肾移植杂志 2024年第2期33卷 136-141页

作者：陈柏锡赵泽文彭思琪葛平江刘双信马建超南方医科大学附属广东省人民医院(广东省医学科学院)肾内科广州510515 华南理工大学医学院南方医科大学附属广东省人民医院(广东省医学科学院)耳鼻喉科

目的:探究继发性甲状旁腺功能亢进(SHPT)患者甲状旁腺切除术(PTX)后发生高钾血症的危险因素,并构建其风险预测模型。方法:本研究纳入2015—2021年在广东省人民医院行PTX的透析患者,根据术后血钾情况将患者分为高钾血症组(>5.3 mmol/L)... 详细信息

目的:探究继发性甲状旁腺功能亢进(SHPT)患者甲状旁腺切除术(PTX)后发生高钾血症的危险因素,并构建其风险预测模型。方法:本研究纳入2015—2021年在广东省人民医院行PTX的透析患者,根据术后血钾情况将患者分为高钾血症组(>5.3 mmol/L)和非高钾血症组(≤5.3 mmol/L)。比较两组患者的临床资料,采用Logistic回归分析探讨SHPT患者PTX后高钾血症的影响因素,并通过绘制受试者工作特征曲线、校准曲线、决策曲线评价模型的区分度、校准度及有效性。结果:共纳入392例患者,高钾血症组98例(25%),非高钾血症组294例(75%)。通过多因素Logistic回归分析,血液透析、术前血钾、术前血清白蛋白(Alb)、血尿素氮(BVN)/血清肌酐(SCr)均为术后高钾血症的预测因素(P<0.05)。纳入经多因素Logistic回归分析筛选的预测因素建立风险预测模型,ROC曲线显示该模型的曲线下面积(AUC)为0.747,通过Bootstrap方法重复抽样1000次对预测模型进行内部验证确认,内部验证AUC为0.733。Hosmer-Lemeshow拟合优度检验结果P=0.723,校正曲线与理想曲线显示出良好的一致性。绘制的临床决策曲线(DCA)结果显示,在阈值概率范围0.06~0.60内模型具有临床效用。结论:血液透析、术前血钾、术前Alb及术前BUN/SCr均为PTX后高钾血症的预测因素,建立的预测模型具有较好的预测能力。

关键词：继发性甲状旁腺功能亢进甲状旁腺切除术高钾血症列线图

Using air curtains to reduce short-range infection risk in consulting ward: A numerical investigation

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Building Simulation 2021年第2期14卷 325-335页

作者： Jin Ye Hua Qian jianchao ma Rong Zhou Xiaohong Zheng School of Energy and Environment Southeast UniversityNanjing210096China Engineering Research Center of BEEE Ministry of Education of ChinaNanjing210096China First Affiliated Hospital of Guangzhou Medical University Guangzhou510000China Guangzhou Angel Biosafety Co. LtdGuangzhou510000China Jiangsu Provincial Key Laboratory of Solar Energy Science and Technology Nanjing210096China

Air curtains is promising in reducing the short-range infection risk in *** quantitatively evaluate its performance,this paper explores air curtains equipped on normal consulting desk to avoid doctor’s direct exposure to the patient exhaled pollutants.A numerical investigation is conducted to evaluate the effects of supply air velocity and angle on cutting off *** results show that the average mass fraction of exhaled pollutants decreases significantly(70%–90%)in the consulting ward,indicating satisfying performance of air *** supply air velocity is demonstrated to be conducive in forming full air curtains,whereas an excessively high supply air velocity may be of adverse effects by entraining exhaled ***,the supply air angle is also critical due to its coupling with supply air *** is found that larger angle(0°–40°)is better where velocity is less than 3 m/s,otherwise a small angle(20°)is preferable where velocity is larger than 3 m/*** flow could be well suppressed at the supply air angle 20°but moves over air curtains at 40°.This study can provide effective and intuitive guidance in applying air curtains in consulting wards.

关键词： air curtains consulting ward cutting off performance numerical investigation

Investigation of maS structure and intelligent^(+) information processing mechanism of hypersonic target detection and recognition system

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Journal of Systems Engineering and Electronics 2020年第6期31卷 1105-1115页

作者： WU Xia LI Yan SUN Yongjian CHEN Alei CHEN Jianwen ma jianchao CHEN Hao Radar Sergeant School Air Force Early-Warning AcademyWuhan 430019China

The hypersonic target detection and recognition system is studied,on the basis of overall planning and design,a multi-agent system(maS)structure and intelligent+information processing mechanism based on target detection and recognition are proposed,and the multi-agent operation process is analyzed and designed in *** the specific agents construction,the information fusion technology is introduced to defining the embedded agents and their interrelations in the system structure,and the intelligent processing ability of complex and uncertain problems is emphatically analyzed from the aspects of autonomy and *** aim is to optimize the information processing strategy of the hypersonic target detection and recognition system and improve the robustness and rapidity of the system.

关键词： hypersonic target detection recognition intelligent information fusion multi-agent system(maS)