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Effects of aggregate size distribution and carbon nanotubes on the mechanical properties of cemented gangue backfill samples under true triaxial compression

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 311-324页

作者： Qian Yin fan wen Zhigang Tao Hai Pu Tianci Deng Yaoyao Meng Qingbin Meng Hongwen Jing bo Meng Jiangyu Wu State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering China University of Mining and TechnologyXuzhou 221116China State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines Anhui University of Science and TechnologyHuainan 232001China State Key Laboratory for Geomechanics&Deep Underground Engineering China University of Mining and Technology(Beijing)Beijing 100083China Key Laboratory of Xinjiang Coal Resources Green Mining Ministry of EducationXinjiang Institute of EngineeringUrumqi 830023China

The mechanical behavior of cemented gangue backfill materials(CGBMs)is closely related to particle size distribution(PSD)of aggregates and properties of cementitious ***,the true triaxial compression tests,CT scanning,SEM,and EDS tests were conducted on cemented gangue backfill samples(CGBSs)with various carbon nanotube concentrations(P_(CNT))that satisfied fractal theory for the PSD of *** mechanical properties,energy dissipations,and failure mechanisms of the CGBSs under true triaxial compression were systematically *** results indicate that appropriate carbon nanotubes(CNTs)effectively enhance the mechanical properties and energy dissipations of CGBSs through micropore filling and microcrack bridging,and the optimal effect appears at P_(CNT)of 0.08wt%.Taking PSD fractal dimension(D)of 2.500 as an example,compared to that of CGBS without CNT,the peak strength(σ_(p)),axial peak strain(ε_(1,p)),elastic strain energy(Ue),and dissipated energy(U_(d))increased by 12.76%,29.60%,19.05%,and90.39%,***,excessive CNTs can reduce the mechanical properties of CGBSs due to CNT agglomeration,manifesting a decrease inρ_(p),ε_(1,p),and the volumetric strain increment(Δε_(v))when P_(CNT)increases from 0.08wt%to 0.12wt%.Moreover,the addition of CNTs improved the integrity of CGBS after macroscopic failure,and crack extension in CGBSs appeared in two modes:detour and pass through the ***σ_(p)and U_(d)firstly increase and then decrease with increasing D,and porosity shows the opposite ***ε_(1,p)andΔε_(v)are negatively correlated with D,and CGBS with D=2.150 has the maximum deformation parameters(ε_(1,p)=0.05079,Δε_(v)=0.01990)due to the frictional slip effect caused by coarse *** increasing D,the failure modes of CGBSs are sequentially manifested as oblique shear failure,"Y-shaped"shear failure,and conjugate shear failure.

关键词： cemented gangue backfill materials particle size distribution true triaxial compression test carbon nanotubes mechanical properties failure modes

Biocompatibility of vascular stents manufactured using metal injection molding in animal experiments

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Transactions of Nonferrous Metals Society of China 2022年第2期32卷 569-580页

作者： Chang SHU Hao HE bo-wen fan Jie-hua LI Tun WANG Dong-yang LI Yi-min LI Hao HE Department of Vascular Surgery Second Xiangya HospitalCentral South UniversityChangsha 410011China Department of Vascular Surgery Fuwai HospitalChinese Academy of Medical ScienceBeijing 100037China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China School of Microelectronic and Materials Engineering Guangxi University of Science and TechnologyLiuzhou 545006China

This study aimed to evaluate the feasibility and safety of a novel stent manufactured by metal injection molding(MIM)in clinical practice through animal *** stents were prepared using powder injection molding technology to considerably improve material *** influence of MIM carbon impurity variation on the mechanical properties and corrosion resistance of 316L stainless steel was *** vitro cytotoxicity and animal transplantation tests were also carried out to evaluate the safety of MIM *** results showed that the performance of 316L stainless steel was very sensitive to the carbon *** fluctuations should be precisely controlled during *** MIM stents were successfully implanted into the aortas of the dogs,and the MIM 316L stents had no significant *** novel intravascular stent manufactured using MIM can maintain a stable form and structure with fast endothelialization of the luminal surface of the stent and ensure long-term patency in an animal *** novel intravascular stent manufactured using MIM demonstrates favorable structural,physical,and chemical stability,as well as biocompatibility,offering promising application in clinical practice.

关键词： vascular stent metal injection molding cytotoxicity test animal experiment biocompatibility

Recovery of indium by acid leaching waste ITO target based on neural network

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Transactions of Nonferrous Metals Society of China 2014年第1期24卷 257-262页

作者：李瑞迪袁铁锤范文博邱子力苏文俊钟楠骞中南大学粉末冶金国家重点实验室长沙410083

The optimized leaching techniques were studied by technical experiment and neural network optimization for improving indium leaching rate. Firstly, effect of single technical parameter on leaching rate was investigated experimentally with other parameters fixed as constants. The results show that increasing residual acidity can improve leaching rate of indium. Increasing the oxidant content can obviously increase leaching rate but the further addition of oxidant could not improve the leaching rate. The enhancement of temperature can improve the leaching rate while the further enhancement of temperature decreases it. Extension leaching time can improve the leaching rate. On this basis, a BPNN model was established to study the effects of multi-parameters on leaching rate. The results show that the relative error is extremely small, thus the BPNN model has a high prediction precision. At last, optimized technical parameters which can yield high leaching rate of 99.5%were obtained by experimental and BPNN studies：residual acidity 50-60 g/L, oxidant addition content 10%, leaching temperature 70 ℃ and leaching time 2 h.

关键词： indium leaching rate ITO waste target BPNN model

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粉丝自制视频“盗猎者”的符号生产机制

编辑之友 2017年第8期 53-56页

作者：邓年生姜博文范玉吉南昌大学新闻与传播学院江西南昌330031 华东政法大学传播学院上海200042

视频文本是粉丝圈的符号游戏场,也是粉丝自恋情结的艺术表达。由于沉迷于对象崇拜,他们具有敏锐的嗅觉,适切的故事素材与已有的认知框架、情感态度发生碰撞,激发他们的创作灵感。粉丝通过对原视频符号的解构与重组进行二次创作,意义编... 详细信息

视频文本是粉丝圈的符号游戏场,也是粉丝自恋情结的艺术表达。由于沉迷于对象崇拜,他们具有敏锐的嗅觉,适切的故事素材与已有的认知框架、情感态度发生碰撞,激发他们的创作灵感。粉丝通过对原视频符号的解构与重组进行二次创作,意义编码带有浓郁的粉丝意志,其自制视频流露出粉丝群集体的价值取向和情感诉求。视频文本也是粉丝自我精神赋权的形式,从而构建出独特的粉丝文化语境。

关键词：粉丝自制视频符号生产机制

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强化研磨轴承套圈残余应力的分析

组合机床与自动化加工技术 2017年第9期 5-8页

作者：刘晓初赵传李凡覃哲周文波陈凡广州大学机械与电气工程学院广州510006 广州大学金属材料强化研磨高性能加工重点实验室广州510006

为了得到残余应力在深度方向的分布关系,对6组不同强化研磨加工时间下的试样进行了金相分析,推导出了强化研磨时间对强化层厚度的影响规律。经过SEM分析,对强化层进行了分区,解释了强化研磨产生残余应力的实质原因。然后对强化研磨残余... 详细信息

为了得到残余应力在深度方向的分布关系,对6组不同强化研磨加工时间下的试样进行了金相分析,推导出了强化研磨时间对强化层厚度的影响规律。经过SEM分析,对强化层进行了分区,解释了强化研磨产生残余应力的实质原因。然后对强化研磨残余应力场进行检测,并对应力释放造成的影响通过弹性理论计算并加以修正。结果表明强化研磨工艺喷射比较均匀,随着测量深度地增加,残余应力值随之增加。在30μm深度以上,残余压应力衰减很快,在120μm深度左右,基本上没有残余应力,在150μm^180μm之间,残余应力会由压应力转变为拉应力。

关键词：残余应力强化研磨强化层

The potential mechanism and clinical application value of remote ischemic conditioning in stroke

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Neural Regeneration Research 2025年第6期20卷 1613-1627页

作者： Yajun Zhu Xiaoguo Li Xingwei Lei Liuyang Tang Daochen wen bo Zeng Xiaofeng Zhang Zichao Huang Zongduo Guo The First Affiliated Hospital of Chongqing Medical University ChongqingChina

Some studies have confirmed the neuroprotective effect of remote ischemic conditioning against stroke. Although numerous animal researches have shown that the neuroprotective effect of remote ischemic conditioning may be related to neuroinflammation, cellular immunity, apoptosis, and autophagy, the exact underlying molecular mechanisms are unclear. This review summarizes the current status of different types of remote ischemic conditioning methods in animal and clinical studies and analyzes their commonalities and differences in neuroprotective mechanisms and signaling pathways. Remote ischemic conditioning has emerged as a potential therapeutic approach for improving stroke-induced brain injury owing to its simplicity, non-invasiveness, safety, and patient tolerability. Different forms of remote ischemic conditioning exhibit distinct intervention patterns, timing, and application range. Mechanistically, remote ischemic conditioning can exert neuroprotective effects by activating the Notch1/phosphatidylinositol 3-kinase/Akt signaling pathway, improving cerebral perfusion, suppressing neuroinflammation, inhibiting cell apoptosis, activating autophagy, and promoting neural regeneration. While remote ischemic conditioning has shown potential in improving stroke outcomes, its full clinical translation has not yet been achieved.

关键词： Akt apoptosis autophagy cerebral perfusion cerebral vascular stenosis clinical transformation hemorrhagic stroke ischemic stroke neuroinflammation neuroprotection Notch1 PI3K remote ischemic conditioning stroke

Literature study on traditional Chinese medicine syndromes after renal transplantation

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World Journal of Transplantation 2025年第1期15卷 150-155页

作者： Yun-Peng Guo Ling-Xue Bao Yu-Yang Wang Quan wen Gai Hang bo Chen Tongliao Clinical Medical College Inner Mongolia Medical UniversityTongliao 028000Inner Mongolia Autonomous RegionChina Department of Urology Tongliao People's HospitalTongliao 028000Inner Mongolia Autonomous RegionChina

BACKGROUND Kidney transplantation is the most effective means to treat patients with renal failure,but its postoperative problems such as rejection reactions,immunosuppressant poisoning,chronic transplant kidney nephropathy,*** have not been effectively *** study searched for literature on traditional Chinese medicine(TCM)syndromes after kidney transplantation in China,conducted statistical analysis of the results,and sought to identify the underlying *** To understand the TCM syndromes after renal transplantation and associated rules and provide a theoretical basis for further clinical *** The literature pertaining to TCM syndromes in renal transplantation,published in the China National Knowledge Infrastructure,Wanfang database,and WIP database from 1970 to 2021,was meticulously searched and comprehensively and statistically *** Following the established inclusion and exclusion criteria,13 studies were selected for ***-renal transplantation,no significant discrepancy was noted among the groups based on the location of TCM ***,when categorized according to TCM pathogenic factors,the groups with spleen and kidney yang deficiency,as well as liver and kidney yin deficiency,exhibited a statistically significant difference in the *** Currently,the research on TCM syndromes pertaining to renal transplantation is in its nascent *** is imperative to conduct a multicentric,large-scale survey of TCM syndromes subsequent to renal transplantation in the ensuing years.

关键词： Kidney transplantation Syndrome Literature analysis Traditional Chinese medicine Systematic review

Loss-of-function mutations of microRNA-142-3p promote ASH1L expression to induce immune evasion and hepatocellular carcinoma progression

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World Journal of Gastroenterology 2025年第1期31卷 126-145页

作者： Xing-Hui Yu Yan Xie Jian Yu Kun-Ning Zhang Zhou-bo Guo Di Wang Zhao-Xian Li Wei-Qi Zhang Yu-Ying Tan Li Zhang wen-Tao Jiang School of Medicine Nankai UniversityTianjin 300192China Tianjin Key Laboratory of Molecular Diagnosis and Treatment of Liver Cancer Tianjin First Center HospitalTianjin 300192China Department of Liver Transplantation Tianjin First Center HospitalTianjin 300192China First Central Clinical School Tianjin Medical UniversityTianjin 300192China

BACKGROUND Hepatocellular carcinoma(HCC)has been a pervasive malignancy throughout the world with elevated *** therapeutic targets are beneficial to treat and predict the ***,the exact molecular mechanisms leading to the progression of HCC are still *** has shown that the microRNA-142-3p level decreases in HCC,whereas bioinformatics analysis of the cancer genome atlas database shows the ASH1L expression increased among liver tumor *** this paper,we will explore the effects and mechanisms of microRNA-142-3p and ASH1L affect the prognosis of HCC patients and HCC cell bioactivity,and the association between *** To investigate the effects and mechanisms of microRNA-142-3p and ASH1L on the HCC cell bioactivity and prognosis of HCC *** In this study,we grouped HCC patients according to their immunohistochemistry results of ASH1L with pathological tissues,and retrospectively analyzed the prognosis of HCC ***,explored the roles and mechanisms of microRNA-142-3p and ASH1L by cellular and animal experiments,which involved the following experimental methods:Immunohistochemical staining,western blot,quantitative real-time-polymerase chain reaction,flow cytometric analysis,tumor xenografts in nude mice,*** statistical methods involved in this study contained t-test,one-way analysis of variance,theχ^(2)test,the Kaplan-Meier approach and the log-rank *** In this study,we found that HCC patients with high expression of ASH1L possess a more recurrence rate as well as a decreased overall survival ***1L promotes the tumorigenicity of HCC and microRNA-142-3p exhibits reduced expression in HCC tissues and interacts with ASH1L through targeting the ASH1L 3′untranslated ***,microRNA-142-3p promotes apoptosis and inhibits proliferation,invasion,and migration of HCC cell lines in vitro via *** the exploration mechanism,we found ASH1L may promote an immunosuppressive mi

关键词： Hepatocellular carcinoma MicroRNA-142-3p ASH1L Immune evasion Tumor immune microenvironment Apoptosis

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海事监管中无人机航拍图像快速拼接算法

传感器与微系统 2017年第9期36卷 113-116页

作者：欧阳帅安博文周凡曹芳上海海事大学信息工程学院上海201306

针对海事监管中航拍图像拼接生成大视场图像的时效性较低以及配准准确性不高的问题,提出了一种快速高效的无人机(UAV)航拍图像拼接算法。根据海事监管辖区航拍图像特点缩小了角点搜索范围,通过设定自适应的梯度阈值和角点响应函数阈值... 详细信息

针对海事监管中航拍图像拼接生成大视场图像的时效性较低以及配准准确性不高的问题,提出了一种快速高效的无人机(UAV)航拍图像拼接算法。根据海事监管辖区航拍图像特点缩小了角点搜索范围,通过设定自适应的梯度阈值和角点响应函数阈值筛选角点,通过局部最大角点响应函数值取舍准则实现了角点均匀化分布;采用基于相位相关的模板粗匹配方法和带有特征约束的RANSAC细匹配方法求出最优变换矩阵;利用人眼的视觉特性改进传统加权平均融合算法的加权因子使图像拼接过渡自然。实验结果表明:算法具有较好的自适应性,在拼接效率和准确率上较传统算法有了很大改善。

关键词：航拍图像角点检测自适应阈值图像配准图像融合