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Synergistic effect of microwave irradiation and CaF2 on vanadium leaching

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International Journal of Minerals,Metallurgy and Materials 2017年第2期24卷 156-163页

作者： jing-peng Wang Yi-min Zhang jing Huang Tao Liu School of Resource and Environmental Engineering Wuhan University of Science and Technology Wuhan 430081 China Hubei Provincial Engineering Technology Research Center of High Efficient Cleaning Utilization for Shale Vanadium Resource Wuhan 430081 China Hubei Provincial Collaborative Innovation Center for High Efficient Utilization of Vanadium Resource Wuhan 430081 China

The effect and mechanism of microwave irradiation on vanadium leaching were studied via a comparison between microwave heating and conventional heating. The results show a synergistic effect of microwave irradiation and calcium fluoride （CaF2） on the vana- dium leaching efficiency. It is confirmed that the vanadium leaching process can be improved by microwave irradiation when CaF2 is present. The leaching rate of vanadium under microwave irradiation is increased by 8%-15% when 5wt% CaF2 is added; by contrast, in the absence of CaF2, the leaching rate is almost unaffected compared to that by conventional heating. Morphological analysis reveals that the particles are gradually eroded by acid under microwave irradiation, whereas some of the fine particles in samples subjected to conventional heating are tightly covered by a flocculent silicate product. Moreover, a large amount of A1 and V and a small amount of Si are dissolved from samples under microwave heating, as revealed by the elemental analysis of leachates. Fourier transform infrared spectroscopic analysis also indicates a higher mass transfer coefficient in the diffusion layer of the raw material by microwave irradiation. When CaF2 is present, the reaction energy barrier is lowered and the leaching process is controlled by the tightly covered product layer, resulting in a prominent effect of mi- crowave irradiation.

关键词： vanadium extraction leaching microwave irradiation calcium fluoride synergistic effects

“大写的科学革命”思想史研究论纲辨析——对王荣江、黄翔、齐文涛的回应

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自然辩证法研究 2024年第7期40卷 24-32页

作者：肖显静华南师范大学科学技术与社会研究院广州510006

《科学思想史》一书遵循“综合论”研究纲领,以科学史为基础,沿着“自然观变革、方法论创新与科学革命”的主线,系统地呈现不同历史阶段的“大写的科学的革命”,能够应对“吉尔挑战”。“大写的”和“小写的”科学革命的内涵和区别是明... 详细信息

《科学思想史》一书遵循“综合论”研究纲领,以科学史为基础,沿着“自然观变革、方法论创新与科学革命”的主线,系统地呈现不同历史阶段的“大写的科学的革命”,能够应对“吉尔挑战”。“大写的”和“小写的”科学革命的内涵和区别是明确的,其演进模式和范式变革不同于库恩的科学革命理论。对不同历史阶段所发生的“大写的科学革命”的概括——“神学式科学”“哲学式科学”“机械式科学”“有机式科学”“地方性科学”,是恰当的。

关键词：科学思想史范式科学革命大写的科学革命小写的科学革命

Restraining growth of Zn dendrites by poly dimethyl diallyl ammonium cations in aqueous electrolytes

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Rare Metals 2024年第8期43卷 3735-3747页

作者： Xiang-Xin Zhang Yuan-Qiang Chen Chang-Xin Lin Yuan-Sheng Lin Guo-Lin Hu Yong-Chuan Liu Xi-Lai Xue Su-jing Chen Zhan-Lin Yang Bai-Sheng Sa Yi-Ning Zhang Key Laboratory of Optoelectronic Materials Chemistry and Physics Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Helmholtz Institute Ulm(HIU) 89081 UlmGermany Karlsruhe Institute of Technology(KIT) 76021 KarlsruheGermany College of Materials Science and Engineering Fuzhou UniversityFuzhou350108China

Metallic zinc is an excellent anode material for Zn-ion batteries,but the growth of Zn dendrite severely hinders its practical ***,an efficient and economical cationic additive,poly dimethyl diallyl ammonium(PDDA) was reported,used in aqueous Zn-ion batteries electrolyte for stabilizing Zn *** growth of zinc dendrites can be significantly restrained by benefiting from the pronounced electrostatic shielding effect from PDDA on the Zn metal ***,the PDDA is preferentially absorbed on Zn(002) plane,thus preventing unwanted side reactions on Zn *** to the introduction of a certain amount of PDDA additive into the common ZnSO_(4)-based electrolyte,the cycle life of assembled Zn‖Zn cells(1 mA·cm^(-2) and 1 mAh·cm^(-2)) is prolonged to more than 1100 *** response to the perforation issue of Zn electrodes caused by PDDA additives,the problem can be solved by combining foamy copper with zinc *** real application,Zn-ion hybrid supercapacitors and MnO_(2)‖Zn cells were assembled,which exhibited excellent cycling stability with PDDA *** work provides a new solution and perspective to cope with the dendrite growth problem of Zn anode.

关键词： PDDA Electrostatic shielding effect Zn anode Zn dendrites

Maternal serum branched-chain amino acids in early pregnancy and offspring growth patterns from 1 year to 8 years of age

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中华医学杂志(英文版) 2024年第15期137卷 1876-1878页

作者： Li Ninghua Leng Junhong Zhang Rui Wang Hui Li Weiqin Zhang Shuang Qiao Yijuan Li jing Yu Zhijie Hu Gang Fang Zhongze Yang Xilin Department of Epidemiology and Biostatistics School of Public Health Tianjin Medical University Tianjin China Project Office Tianjin Women and Children’s Health Center Tianjin China Tianjin Key Laboratory of Environment Nutrition and Public Health Tianjin China Tianjin Center for International Collaborative Research on Environment Nutrition and Public Health Tianjin China Population Cancer Research Program and Department of Pediatrics Dalhousie University Halifax Canada Chronic Disease Epidemiology Laboratory Pennington Biomedical Research Center Baton Rouge LA USA Department of Toxicology and Sanitary Chemistry School of Public Health Tianjin Medical University Tianjin China

替雷利珠单抗致暴发性1型糖尿病1例并文献学习

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实用药物与临床 2024年第2期27卷 126-129页

作者：张靖王飞彭净张春雨山东省东明县人民医院药学部山东东明274500 山东省东明县人民医院呼吸与危重症医学科山东东明274500 山东省济宁医学院附属医院药学部山东济宁272000

1例74岁女性左侧输尿管癌(高级别尿路上皮癌)患者接受替雷利珠单抗静脉滴注200 mg(1次/3周)。患者于2021年10月24日至2022年2月21日行5次免疫治疗前,实验室检查空腹血糖均在正常范围内,非住院期间未监测血糖。于2022年5月入院行免疫治... 详细信息

1例74岁女性左侧输尿管癌(高级别尿路上皮癌)患者接受替雷利珠单抗静脉滴注200 mg(1次/3周)。患者于2021年10月24日至2022年2月21日行5次免疫治疗前,实验室检查空腹血糖均在正常范围内,非住院期间未监测血糖。于2022年5月入院行免疫治疗前实验室检查示:葡萄糖36.93 mmol/L,糖化血红蛋白7.9%,空腹C肽0.27 ng/ml,血β羟丁酸0.24 mmol/L,诊断为暴发性1型糖尿病,给予降糖、补液、纠正水电解质及酸碱平衡治疗26 d后,患者血糖控制稳定。

关键词：免疫检查点抑制剂替雷利珠单抗暴发性1型糖尿病

改进YOLOv8的道路交通标志目标检测算法

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计算机工程与应用 2024年第8期60卷 202-212页

作者：田鹏毛力江南大学人工智能与计算机学院江苏无锡214122

虽然,当前检测技术日趋成熟,但对于复杂环境下的小目标检测仍然是研究的重难点。针对道路交通场景中普遍存在的交通标志小目标比例较高,环境干扰因素较大的问题,提出了一种基于YOLOv8改进的道路交通标志目标检测算法。由于小目标检测中... 详细信息

虽然,当前检测技术日趋成熟,但对于复杂环境下的小目标检测仍然是研究的重难点。针对道路交通场景中普遍存在的交通标志小目标比例较高,环境干扰因素较大的问题,提出了一种基于YOLOv8改进的道路交通标志目标检测算法。由于小目标检测中容易出现漏检的现象,利用BRA(bi-level routing attention)注意力机制提高网络对小目标的感知能力。此外,还利用可形变卷积模块DCNv3(deformable convolution v3),针对特征图中的不规则形状具有更好的特征提取能力,使骨干网络更好地适应不规则的空间结构,更精准地关注重要目标,从而提高模型对遮挡重叠目标的检测能力。DCNv3和BRA模块均在基本不增加模型权重大小的情况下提高模型准确性。同时引入基于辅助边框的Inner-IOU损失函数。在RoadSign、CCTSDB、TSDD、GTSDB四个数据集上,分别进行了小样本训练、大样本训练、单目标检测和多目标检测,实验结果均有所提高。其中,在RoadSign数据集上的实验结果最佳,YOLOv8改进模型的均值平均精度mAP50与mAP50:95分别达到了90.7%和75.1%,相较于基线模型,mAP50与mAP50:95分别提升了5.9和4.8个百分点。实验结果表明,YOLOv8改进模型有效地实现了在复杂道路场景下的交通标志检测。

关键词： YOLOv8 小目标检测可形变卷积注意力机制复杂道路场景

Evaluation of the effectiveness of preventive nursing measures for pressure injuries in patients in the neurology intensive care unit

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World Journal of Clinical Cases 2024年第19期12卷 3807-3814页

作者： Rong Zhang peng-Xin Ma Juan-Juan Zhang Intensive Medicine Department The First People’s Hospital of Jiangxia DistrictWuhan 430000Hubei ProvinceChina Department of Neurology The First People’s Hospital of Jiangxia DistrictWuhan 430000Hubei ProvinceChina

BACKGROUND Patients in neurology intensive care units(ICU)are prone to pressure injuries(PU)due to factors such as severe illness,long-term bed rest,and physiological *** not only causes pain and complications to patients,but also increases medical burden,prolongs hospitalization time,and affects the recovery *** To evaluate and optimize the effectiveness of pressure injury prevention nursing measures in neurology ICU *** A retrospective study was conducted,and 60 patients who were admitted to the ICU of the Department of Neurology were selected and divided into an observation group and a control group according to the order of admission,with 30 people in each *** observation group implemented pressure injury prevention and nursing measures,while the control group adopted routine *** Comparison between observation and control groups following pressure injury prevention nursing intervention revealed significantly lower incidence rates in the observation group compared to the control group at 48 h(8.3%vs 26.7%),7 d(16.7%vs 43.3%),and 14 d(20.0%vs 50.0%).This suggests a substantial reduction in pressure injury incidence in the observation group,with the gap widening over ***,patients in the observation group exhibited quicker recovery,with a shorter average time to get out of bed(48 h vs 72 h)and a shorter average length of stay(12 d vs 15 d)compared to the control ***,post-intervention,patients in the observation group reported significantly improved quality of life scores,including higher scores in body satisfaction,feeling and function,and comfort(both psychological and physiological),indicating enhanced overall well-being and comfort following the implementation of pressure injury prevention nursing *** Implementing pressure injury preventive care measures for neurology ICU patients will have better results.

关键词： Neurology intensive care units Pressure injury Preventive care Effect evaluation Optimization research Prognostic effect

套层叙事、文本互涉与意义生成——评《走走停停》

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当代电影 2024年第7期 48-51页

作者：彭涛武昌理工学院影视传媒学院华中师范大学新闻传播学院

电影《走走停停》在套层叙事结构中,构建了层层嵌套、相互咬合的三个文本。每个文本指涉的意义不同。第一文本刻画的“无为”青年吴迪形象,是当代电影人物形象系列中具有独特审美意义的形象。他的性格-思维模式,体现了中国传统的中庸之... 详细信息

电影《走走停停》在套层叙事结构中,构建了层层嵌套、相互咬合的三个文本。每个文本指涉的意义不同。第一文本刻画的“无为”青年吴迪形象,是当代电影人物形象系列中具有独特审美意义的形象。他的性格-思维模式,体现了中国传统的中庸之道。第二文本既有对田园牧歌式情感的怀念,亦有解构。第三文本则通过对一部纪录片的拍摄及获奖的过程呈现,表达了导演对真实以及对新闻框架叙事的思考和反思。

关键词：套层叙事《走走停停》文本互涉 “无为” 青年暧昧的真实

Compressed Sensing of IR-UWB Wireless Sensor Network Data Based on Two-Dimensional Measurements

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Chinese Journal of Electronics 2015年第3期24卷 627-632页

作者： WANG kai LIU Yulin WAN Qun jing Xiaojun Chongqing Communication Institute China Electronic System Engineering Company University of Electronic Science and Technology of China Beijing University of Posts and Telecommunications

A novel Compressed sensing(CS) method based on two-dimensional measurements is proposed that can be effectively utilized in Impulse radio ultra-wideband wireless sensor networks(IR-UWB WSNs) to significantly reduce the energy consumption and sampling rate in sensor data transferring. We start by establishing the CS measurement model by taking both spatial and temporal correlations of Wireless sensor network(WSN) data into account. Since our model incorporates a new type of measurement matrix: the block quasi-Toeplitz structured matrix, we derive the Restricted isometry property(RIP)of the block quasi-Toeplitz structured matrix to ensure the performance of the two-dimensional recovery of WSNs data. We substantiate our mathematical analysis by numerical examples in the context of ideal spares vector and real WSN data, and results demonstrate that the approach achieves significantly saving of energy and sampling rate with small reconstruction error.

关键词： Compressed sensing Wireless sensor net-works IR-UWB Measurement Restricted isometry property