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CO_(2)点阵激光与曲安奈德联合治疗瘢痕疙瘩的效果观察

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中华医学美学美容杂志 2024年第3期30卷 278-281页

作者：韩小雪张潘郑飞北京美天医疗美容医院北京100030

目的探讨CO_(2)点阵激光与曲安奈德联合治疗瘢痕疙瘩的效果。方法2019年1月至2021年12月,北京美天医疗美容医院瘢痕疙瘩患者24例,年龄22~53岁,随机分为2组:治疗1组12例,用CO_(2)点阵激光+局部外用曲安奈德治疗;治疗2组12例,用瘢痕疙瘩... 详细信息

目的探讨CO_(2)点阵激光与曲安奈德联合治疗瘢痕疙瘩的效果。方法2019年1月至2021年12月,北京美天医疗美容医院瘢痕疙瘩患者24例,年龄22~53岁,随机分为2组:治疗1组12例,用CO_(2)点阵激光+局部外用曲安奈德治疗;治疗2组12例,用瘢痕疙瘩内曲安奈德注射治疗。每4周治疗1次,治疗4~9次,随访12个月。每次治疗前后评估瘢痕体积,并用温哥华瘢痕量表评估瘢痕情况。结果治疗后,治疗2组的瘢痕体积变化大于治疗1组(85.4%比60.1%,χ^(2)=6.19,P=0.011),治疗1组温哥华瘢痕量表评分从(7.8±1.5)分降至(4.4±1.3)分(t=4.58,P<0.05),治疗2组从(8.6±0.9)分降至(4.8±1.3)分(t=3.45,P<0.05)。治疗过程中及治疗结束时,治疗1组疼痛分数低于治疗2组,患者舒适度和依从性提高。结论CO_(2)点阵激光联合外用曲安奈德更适用于疼痛敏感的瘢痕疙瘩患者。

关键词：瘢痕疙瘩 CO_(2)点阵激光曲安奈德皮损内注射治疗结果

Size dependence of carbon-encapsulated iron-based nanocatalysts for Fischer–Trposch synthesis

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Nano Research 2023年第5期16卷 6270-6277页

作者： xiaoxue han Jing Lv Shouying Huang Qiao Zhao Yue Wang Zhenhua Li Xinbin Ma Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Zhejiang Institute of Tianjin University Ningbo 315201China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

The conversion from syngas derived from non-petroleum recourses to liquid fuels and chemicals via Fischer–Tropsch synthesis(FTS)is regarded as an alternative and potential route.Developing catalyst with controllable particle size and clarifying size effect are of significance to promote the process.Herein,we engineered carbon-encapsulation structure to restrict particle growth but avoid strong metal–support interactions.The prepared carbon-encapsulated nanoparticles(Fe@C)showed a superior catalytic activity compared with conventional carbon-supported nanoparticles(Fe/C).By tuning particle size from 3.0 to 9.1 nm,a volcano-like trend of iron time yield(FTY)peaked at 2659μmol·gFe^(−1)·s^(−1)is obtained with an optimum particle size of 5.3 nm.According to temperature-programmed reduction and desorption results,a linear relationship between apparent turnover frequency and CO dissociation capacity was established.The enhanced CO dissociative adsorption along with weakened H_(2)activation on larger nanoparticles resulted in higher C_(5+)selectivity.This study provides a strategy to synthesize carbon supported metal catalysts with controllable particle size and insight into size effect on Fe-based catalytic FTS.

关键词： Fischer–Tropsch synthesis iron-based catalyst carbon-encapsulation size effect

Proximity Effect of Fe-Zn Bimetallic Catalysts on CO_(2) Hydrogenation Performance

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Transactions of Tianjin University 2023年第4期29卷 293-303页

作者： Shengkun Liu Qiao Zhao xiaoxue han Chongyang Wei Haoting Liang Yidan Wang Shouying Huang Xinbin Ma Key Laboratory for Green Chemical Technology of Ministry of Education Haihe Laboratory of Sustainable Chemical TransformationsSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China School of Materials Science and Engineering National Institute for Advanced MaterialsNankai UniversityTianjin 300350China Zhejiang Institute of Tianjin University Ningbo 315201China

The interaction between a promoter and an active metal crucially impacts catalytic performance.Nowadays,the influence of promoter contents and species has been intensively considered.In this study,we investigate the effect of the iron(Fe)-zinc(Zn)proximity of Fe-Zn bimetallic catalysts on CO_(2)hydrogenation performance.To eliminate the size effect,Fe_(2)O_(3)and ZnO nanoparticles with uniform size are first prepared by the thermal decomposition method.By changing the loading sequence or mixing method,a series of Fe-Zn bimetallic catalysts with different Fe-Zn distances are obtained.Combined with a series of characterization techniques and catalytic performances,Fe-Zn bimetallic proximity for compositions of Fe species is discussed.Furthermore,we observe that a smaller Fe-Zn distance inhibits the reduction and carburization of the Fe species and facilitates the oxidation of carbides.Appropriate proximity of Fe and Zn(i.e.,Fe_1Zn_(1)-imp and Fe_(1)Zn_(1)-mix samples)results in a suitable ratio of the Fe_5C_(2)and Fe_(3)O_(4)phases,simultaneously promoting the reverse water-gas shift and Fischer-Tropsch synthesis reactions.This study provides insight into the proximity effect of bimetallic catalysts on CO_(2)hydrogenation performance.

关键词： CO_(2)hydrogenation Fe-based catalyst Promoter Proximity effect

基于ResNet和双注意力机制的赤足图像年龄预测

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辽宁师范大学学报（自然科学版） 2024年第2期47卷 174-183页

作者：张涛韩晓雪成文超王慧王宇轩辽宁师范大学物理与电子技术学院辽宁大连116029

足迹是人在行走时足部与地面等客体接触时所留下的痕迹,也是犯罪现场嫌疑人最容易遗留的生物特征之一,它隐含着人体的身高、体重、性别和年龄等身份属性信息,利用足迹信息进行人的年龄预测,对指明侦察方向和缩小侦察范围有着极其重要的... 详细信息

足迹是人在行走时足部与地面等客体接触时所留下的痕迹,也是犯罪现场嫌疑人最容易遗留的生物特征之一,它隐含着人体的身高、体重、性别和年龄等身份属性信息,利用足迹信息进行人的年龄预测,对指明侦察方向和缩小侦察范围有着极其重要的意义.传统侦查工作中,刑侦专家会依据积累的案件经验,依据现场遗留的足迹进行嫌疑人身份和属性的预测,但这个过程需要大量的领域知识,据此,提出了基于赤足图像的年龄自动预测方法,其由伪彩色变换模块、在线随机几何变换模块、特征提取模块、空间注意力模块和年龄预测模块组成.算法在由1 818幅赤足灰度图像组成的数据集上进行了测试,预测准确率指标Acc_5和Acc_10分别达到了55.5%和83.4%,优于现有的年龄预测方法.

关键词：年龄预测赤足图像 ResNet18网络瓶颈注意力机制空间注意力机制

Regulating electronic environment on alkali metal-doped Cu@NS-SiO_(2) for selective anisole hydrodeoxygenation

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绿色化学工程(英文) 2023年第3期4卷 294-302页

作者： Xiaofei Wang xiaoxue han Li Kang Shixiang Feng Meiyan Wang Yue Wang Shouying Huang Yujun Zhao Shengping Wang Xinbin Ma Key Laboratory for Green Chemical Technology of Ministry of Education Collaborative Innovation Centre of Chemical Science and EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin300072China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou350207China Haihe Laboratory of Sustainable Chemical Transformations Tianjin300192China

Lignin utilization is a potential approach for replacing fossil energy and releasing the environment pressure.Herein,we synthesized a series of novel Cu-based catalysts,Cu@NS-SiO_(2)(NS=nano sphere)and alkali metals(Na,K,Rb,and Cs)doped Cu@NS-SiO_(2),and applied them in hydrodeoxygenation reaction of anisole.High Cu dispersion was presented on all catalysts.The modification of alkali metals on Cu@NS-SiO_(2) significantly enhanced the electron density of Cu sites in the following order:Cs>Rb>K>Na,among which Cs decreased the Cu_(2)p_(3)/2 binding energy most(by 0.7 eV).Moreover,the modification did not substantially affect the geometric structure of Cu species.This regulable electronic environment of Cu sites was crucial for selective deoxygenation and inhibiting the hydrogenation of aromatic rings in anisole,and thus promoted the selectivity of benzene.Compared with Cu@NS-SiO_(2)(~59%),the highest benzene selectivity was obtained on Cs/10Cu@NS-SiO_(2) at~83%.

关键词： Anisole Hydrodeoxygenation Arenes Alkali metal Electronic effect

超皮秒1064 nm激光治疗面部毛孔粗大的效果

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中华医学美学美容杂志 2024年第1期30卷 65-68页

作者：韩小雪周明郭乔娜刘成波王延婷北京美天医疗美容医院北京100030 西安国际医学中心医院医学美容中心西安710100

目的:评估超皮秒1064 nm激光治疗面部毛孔粗大的疗效及安全性。方法:2022年11月至2023年4月,于西安国际医学中心医院医学美容中心就诊的面部毛孔粗大女性患者31例,年龄28~52(35.2±5.5)岁。用超皮秒1064 nm激光点阵手具治疗,每4周1次,共... 详细信息

目的:评估超皮秒1064 nm激光治疗面部毛孔粗大的疗效及安全性。方法:2022年11月至2023年4月,于西安国际医学中心医院医学美容中心就诊的面部毛孔粗大女性患者31例,年龄28~52(35.2±5.5)岁。用超皮秒1064 nm激光点阵手具治疗,每4周1次,共3次;末次治疗后1个月,通过面部毛孔评分、VISIA毛孔特征计数绝对值评估面部毛孔变化,并评估不良反应。结果:31例患者均完成治疗,治疗前、后患者面部毛孔评分分别为4(4,5)、2(2,3)分,面部毛孔评分较治疗前下降,差异有统计学意义(Z=-4.99,P<0.001)。治疗前、后VISIA面部毛孔计数绝对值分别为859(829,1147)、652(632,731),患者治疗后VISIA毛孔计数绝对值较治疗前下降,差异有统计学意义(Z=-4.86,P<0.05)。结论:超皮秒激光能有效改善面部毛孔粗大,未发生明显不良反应。

关键词：激光毛孔粗大超皮秒激光 VISIA 疗效和安全性

Policy Network-Based Dual-Agent Deep Reinforcement Learning for Multi-Resource Task Offloading in Multi-Access Edge Cloud Networks

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China Communications 2024年第4期21卷 53-73页

作者： Feng Chuan Zhang Xu han Pengchao Ma Tianchun Gong xiaoxue School of Communications and Information Engineering Chongqing University of Posts and TelecommunicationsChongqing 400065China Institute of Intelligent Communication and Network Security Chongqing University of Posts and TelecommunicationsChongqing 400065China Key Laboratory of Big Data Intelligent Computing Chongqing University of Posts and TelecommunicationsChongqing 400065China School of Information Engineering Guangdong University of TechnologyGuangzhou 510006China

The Multi-access Edge Cloud(MEC) networks extend cloud computing services and capabilities to the edge of the networks. By bringing computation and storage capabilities closer to end-users and connected devices, MEC networks can support a wide range of applications. MEC networks can also leverage various types of resources, including computation resources, network resources, radio resources,and location-based resources, to provide multidimensional resources for intelligent applications in 5/6G.However, tasks generated by users often consist of multiple subtasks that require different types of resources. It is a challenging problem to offload multiresource task requests to the edge cloud aiming at maximizing benefits due to the heterogeneity of resources provided by devices. To address this issue,we mathematically model the task requests with multiple subtasks. Then, the problem of task offloading of multi-resource task requests is proved to be NP-hard. Furthermore, we propose a novel Dual-Agent Deep Reinforcement Learning algorithm with Node First and Link features(NF_L_DA_DRL) based on the policy network, to optimize the benefits generated by offloading multi-resource task requests in MEC networks. Finally, simulation results show that the proposed algorithm can effectively improve the benefit of task offloading with higher resource utilization compared with baseline algorithms.

关键词： benefit maximization deep reinforcement learning multi-access edge cloud task offloading

ATB-25在寒区道路大修工程中的优化设计研究

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低温建筑技术 2024年第3期46卷 52-55,60页

作者：韩晓雪赵万彦姚远王俣涵刘伟付立兵大庆市交通运输局黑龙江大庆163311 黑龙江路原科技有限公司黑龙江大庆163000

为提升寒区沥青路面耐久性,解决寒区ATB-25沥青路面出现的离析、渗水严重等问题。通过合理减少粗集料比例,并增加细集料比例来填充空隙,有效减少沥青混合料的级配离析程度;在摊铺环节中,运用降低螺旋布料器高度、延长螺旋布料器两端搅... 详细信息

为提升寒区沥青路面耐久性,解决寒区ATB-25沥青路面出现的离析、渗水严重等问题。通过合理减少粗集料比例,并增加细集料比例来填充空隙,有效减少沥青混合料的级配离析程度;在摊铺环节中,运用降低螺旋布料器高度、延长螺旋布料器两端搅龙长度、增设反向叶片等措施,提高沥青混合料的混合均匀性;初压改用胶轮压路机对粗细集料进行重新分配,使沥青胶浆上浮进一步填充空隙。研究结果表明,通过兼顾沥青混合料的高温性能和密水性来调整混合料级配,并从摊铺、碾压施工环节加以改进,能够在保证ATB-25混合料高温性能的同时,有效提升ATB-25沥青路面的密水性,可为寒区类似ATB-25沥青路面的施工优化提供借鉴。

关键词：寒冷地区 ATB-25 沥青路面耐久性

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全固废烧结砖的制备及性能研究

青岛理工大学学报 2024年第2期45卷 28-35页

作者：王正华熊淑琴武文皓韩晓雪郭晨赵翰霖全洪珠青岛三星工程有限公司山东省建设建工(集团)有限责任公司青岛农业大学建筑工程学院

以建筑渣土、黄河沉积沙以及污泥为原材料制备全固废烧结砖，借助XRD、XRF、SEM等手段对原材料进行了详细的理化性质测试，确定了坯体的最佳制备方法及烧结制度，探究了含水率及黄河沉积沙掺量对烧结砖力学性能的影响规律。结果表明：... 详细信息

以建筑渣土、黄河沉积沙以及污泥为原材料制备全固废烧结砖，借助XRD、XRF、SEM等手段对原材料进行了详细的理化性质测试，确定了坯体的最佳制备方法及烧结制度，探究了含水率及黄河沉积沙掺量对烧结砖力学性能的影响规律。结果表明：含水率为25%时坯体水分挥发稳定，此时砖体烧结强度高；黄河沉积沙取代率为30%时坯体内形成完整的骨架结构，烧结砖强度增加；在每2个梯度间进行2 h保温处理，可为物质反应及气体挥发提供所需外部环境，提升烧结质量；烧结砖内部存在高温冷却后形成的由玻璃相以及主晶相构成的砖体骨架，使砖体具有良好的结构稳定性及力学强度；在含水率为25%、黄河沉积沙取代率为30%时，砖体强度达到29.3 MPa,吸水率为9.9%,符合工程用砖要求。通过原材料处理、配比设计、坯体成型、烧结工艺等方面对烧结砖的制备工艺进行研究，为全固废烧结砖的生产制备提供了理论依据。

关键词：固废烧结砖烧结制度建筑渣土黄河沉积沙污泥