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Chinese Chemical Letters 2024年第7期35卷 247-252页

作者： xiao xiao Biao Chen Jia-Wei Li Jun-Bo Zheng Xu Wang Hang Zhao Fen-Er Chen Institute of Pharmaceutical Science and Technology Collaborative Innovation Center of Yangtze River Delta Region Green PharmaceuticalsZhejiang University of TechnologyHangzhou 310014China College of Chemistry and Chemical Engineering Jiangxi Normal UniversityNanchang 330022China Engineering Center of Catalysis and Synthesis for Chiral Molecules Department of ChemistryFudan UniversityShanghai 200433China Shanghai Engineering Center of Industrial Asymmetric Catalysis for Chiral Drugs Shanghai 200433China

A highly efficient and concise bromocyclization has been successfully achieved,in which tryptamine/tryptophol derivates can be transformed to valuable HPI/TFI scaffolds with economic and green ***,a controllable cascade transformation of bromocyclization and aromatic bromination has also been smoothly achieved to form dibrominated HPIs and *** could be successfully scaled up under both the batch process and a continuous flow *** most remarkable peculiarity of our process over all previous methods is that the generated water is the major ***,successful application of this new protocol has been demonstrated by the pharmaceutical and natural products syntheses.

关键词： Tryptamines and tryptophols Nitrite Economic and sustainable bromocyclization HPI and TFI structures Bath and flow

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Considering individual game behavior and time delay in the multi-channel rumor propagation model

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Communications in Theoretical Physics 2024年第7期76卷 9-29页

作者： Yafang Dong Liang'an Huo xiaoxiao Xie ming Li Business School University of Shanghai for Science and TechnologyShanghai 200093China School of Intelligent Emergency Management University of Shanghai for Science and TechnologyShanghai 200093China

The rapid development of the Internet has accelerated the spread of rumors,posing challenges to social cohesion and *** address this,a multi-channel rumor propagation model incorporating individual game behavior and time delay is *** depicts individuals strategically choosing propagation channels in the rumor spread process,capturing real-world intricacies more ***,the model allowing spreaders to choose between text and video information base *** adoption hinges on benefits versus costs,with payoffs dictating strategy and the propagation process determining an individual's *** theoretical analysis of the model,the propagation threshold and equilibrium points are *** the stability of the model is further demonstrated based on Routh-Hurwitz judgment and Descartes'Rule of *** simulations are conducted to verify the correctness of the theoretical results and the sensitivity of the model to key *** outcomes reveal that increasing the propagation cost of spreaders can significantly curb the spread of *** contrast to the classical ISR model,rumors spread faster and more widely in the improved multi-channel rumor propagation model in this paper,which is a feature more aligned with real-world ***,the validity and predictive ability of the model are verified by using real rumor propagation data sets,indicating that the improved multi-channel rumor propagation model has good practical application and predictive value.

关键词： multi-channel rumor propagation time delay game behavior

Extraction of Valuable Metals from Titanium-bearing Blast Furnace Slag by Acid Leaching

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Journal of Wuhan University of Technology(Materials Science) 2024年第2期39卷 376-385页

作者：刘燕 CHEN Xuegui MAO Shuaidong xiao Yadong LI Jiacong School of Metallurgy Northeastern UniversityShenyang 110819China Key Laboratory of Ecological Metallurgy of Multi-metal Intergrown Ores of Ministry of Education Shenyang 110819China

To realize the resource utilization of the valuable metals in the titanium-containing blast furnace slag,the process route of “hydrochloric acid leaching-electrolysis-carbonization and carbon dioxide capture-preparation of calcium carbonate” was *** this study,the influences of process conditions on the leaching rates of calcium,magnesium,aluminum,and iron and the phases of the leaching residue were investigated for the leaching *** experimental results show that the HCl solution could selectively leach the elements from the titanium-containing blast furnace *** better leaching conditions are the HCl solution concentration of 4 mol/L,the leaching time of 30 min,the ratio of liquid volume to solid gas of 10 mL/g,and the stirring paddle speed of 300 r/*** the conditions,the leaching rates of calcium,magnesium,aluminum,and iron can reach 85.87%,73.41%,81.35%,and 59.08%,and the leaching rate of titanium is 10.71%.The iron and the aluminum are removed from the leachate to obtain iron-aluminum water purification agents,and the magnesium is removed from the leachate to obtain magnesium *** leaching residue phase is dominated by perovskite,followed by magnesium silicate and tricalcium aluminate,and the titaniumrich material could be obtained from the leaching residue by desiliconization.

关键词： titanium-containing blast furnace slag acid leaching valuable metals comprehensive utilization

利用井中低频偶极横波进行声波远探测的新方法

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地球物理学报 2013年第10期56卷 3572-3580页

作者：魏周拓唐晓明苏远大谭宝海中国石油大学(华东)地球科学与技术学院中海油田服务股份有限公司-中国石油大学(华东)声学测井联合实验室青岛266580

为了突破目前声波远探测技术存在的局限性,提出了一种新的偶极横波远探测方法,即利用井中偶极子产生的井中弯曲波存在低频截止频率的现象,在声源截止频率以下激发偶极声波.通过对比分析井中偶极声源分别在截止频率上、下激发时,井孔内... 详细信息

为了突破目前声波远探测技术存在的局限性,提出了一种新的偶极横波远探测方法,即利用井中偶极子产生的井中弯曲波存在低频截止频率的现象,在声源截止频率以下激发偶极声波.通过对比分析井中偶极声源分别在截止频率上、下激发时,井孔内外产生的辐射声场,明确了截止频率以下井中偶极声源的远场辐射特征和低频截止频率激发偶极横波的优势,结合数值模拟,进一步对其反射声场进行了分析.结果表明,该方法可以避免艾里相的巨大振幅对数据量化产生的"饱和"效应,相比传统的远探测测井方式更具优势,常规源距即可满足专门的远探测测井仪器需求.

关键词：远探测测井偶极声源截止频率横波辐射反射声场

CCD与磁-陀螺系统组合测量弹目相对方位的方法

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弹道学报 2009年第2期21卷 31-35页

作者：柏杰锋王晓鸣高旭东南京理工大学机械工程学院南京210094

弹目相对方位是弹丸修正所需的重要参数.提出了一种利用由磁-陀螺姿态测量系统和CCD组成的低成本测量系统测量弹目相对方位的方法,给出了利用地磁矢量、陀螺和CCD测量结果进行弹目相对方位解算的数学模型,进行了仿真试验.试验结果表明,... 详细信息

弹目相对方位是弹丸修正所需的重要参数.提出了一种利用由磁-陀螺姿态测量系统和CCD组成的低成本测量系统测量弹目相对方位的方法,给出了利用地磁矢量、陀螺和CCD测量结果进行弹目相对方位解算的数学模型,进行了仿真试验.试验结果表明,该方法在一定条件下测量弹目相对方位能达到较高的精度,即弹目相对转角不超过5°.

关键词：修正弹药磁-陀螺系统组合测量相对方位

Calpain inhibition ameliorates scald burn-induced acute lung injury in rats

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Burns & Trauma 2018年第4期6卷 307-315页

作者： Peng-Ran Du Hong-Ting Lu Xi-Xiang Lin Li-Feng Wang Yan-Xia Wang xiao-ming Gu xiao-Zhi Bai Ke Tao Jing-Jun Zhou Department of Physiology and Pathophysiology Fourth Military Medical UniversityNo.169 Changle West RoadXi'an 710032China Department of Biochemistry Fourth Military Medical UniversityXi'anShaanxiChina Department of Pathology Fourth Military Medical UniversityXi'anShaanxiChina Department of Burns and Cutaneous Surgery Xijing HospitalFourth Military Medical UniversityXi'anShaanxiChina

Background:The molecular pattern of severe burn-induced acute lung injury, characterized by cell structure damage and leukocyte infiltration, remains unknown. This study aimed to determine whether calpain, a protease involved in both processes, mediates severe burn-induced acute lung injury. Methods:Rats received ful-thickness scald burns covering 30%of the total body surface area, fol owed by instant fluid resuscitation. MDL28170 (Tocris Bioscience), an inhibitor of calpain, was given intravenously 1 h before or after the scald burn. The histological score, wet/dry weight ratio, and caspase-3 activity were examined to evaluate the degree of lung damage. Calpain activity and its source were detected by an assay kit and immunofluorescence staining. The proteolysis of membrane skeleton proteinsα-fodrin and ankyrin-B, which are substrates of calpain, was measured by Western blot. Results:Time-course studies showed that tissue damage reached a peak between 1 and 6 h post-scald burn and gradually diminished at 24 h. More importantly, calpain activity reached peak levels at 1 h and was maintained until 24 h, paralleled by lung damage to some extent. Western blot showed that the levels of the proteolyzed forms ofα-fodrin and ankyrin-B correlated well with the degree of damage. MDL28170 at a dose of 3 mg/kg b. w. given 1 h before burn injury not only antagonized the increase in calpain activity but also ameliorated scald burn-induced lung injury, including the degradation ofα-fodrin and ankyrin-B. Immunofluorescence images revealed calpain 1 and CD45 double-positive cel s in the lung tissue of rats exposed to scald burn injury, suggesting that leukocytes were a dominant source of calpain. Furthermore, this change was blocked by MDL28170. Final y, MDL28170 given at 1 h post-scald burn injury significantly ameliorated the wet/dry weight ratio compared with burn injury alone. Conclusions:Calpain, a product of infiltrating leukocytes, is a mediator of scald burn-induced acute l

关键词： Acute lung injury Burn Calpain Inflammation Membrane skeleton proteins Scald

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低速城轨磁浮车辆的耦合动力学仿真研究

中山大学学报（自然科学版） 2008年第S2期47卷 98-102页

作者：阳奕鹏韩强姚小虎刘晓明胡伯仁华南理工大学土木与交通学院广东广州510640 成都飞机公司技术中心四川成都610092

在建立五转向架城轨磁浮车辆动力学模型的基础上,首先进行考虑侧风和行驶风阻的车辆直线加速工况仿真,给出重要构件的受力和变形特征;然后开展5种不同侧风时车辆加速过程的仿真分析,比较不同风速时,牵引拉杆和抗侧滚梁吊杆等构件的受力... 详细信息

在建立五转向架城轨磁浮车辆动力学模型的基础上,首先进行考虑侧风和行驶风阻的车辆直线加速工况仿真,给出重要构件的受力和变形特征;然后开展5种不同侧风时车辆加速过程的仿真分析,比较不同风速时,牵引拉杆和抗侧滚梁吊杆等构件的受力规律。在仿真结果分析的基础上,指出了五转向架城轨磁浮车辆设计时应注意的一些问题。

关键词：五转向架城轨磁浮车辆动力学仿真

弱磁场下低温中和法制备亚微米非晶态δ-FeOOH的研究

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化学学报 2006年第21期64卷 2173-2177页

作者：傅小明钟云波任忠鸣邓康徐匡迪上海大学上海市现代冶金与材料制备重点实验室上海200072

利用XRD和SEM分别对在弱磁场下通过低温中和法制备的羟基铁氧化物进行相成分和颗粒形貌分析.试验结果表明:无磁场下,产物是由部分球形和部分针状的α-FeOOH组成.0.1T磁场下,产物是纺锤形的γ-FeOOH,但是,其粒度分布很不均匀.0.3T磁场下... 详细信息

利用XRD和SEM分别对在弱磁场下通过低温中和法制备的羟基铁氧化物进行相成分和颗粒形貌分析.试验结果表明:无磁场下,产物是由部分球形和部分针状的α-FeOOH组成.0.1T磁场下,产物是纺锤形的γ-FeOOH,但是,其粒度分布很不均匀.0.3T磁场下,产物是球形的Fe1.833(OH)0.5O0.***.0.5T磁场下,产物是100nm左右的球形的非晶态δ-***1.833(OH)0.5O0.25是无磁场下制备的α-FeOOH向弱磁场下制备的δ-FeOOH转变的中间产物.并且,亚微米球形Fe1.833(OH)0.5O0.25和亚微米非晶态球形δ-FeOOH的粒度分布都很均匀.此外,弱磁场影响羟基铁氧化物的结晶度.

关键词：弱磁场低温中和法亚微米非晶态δ-FeOOH

中文简化版PAD情绪量表在京大学生中的初步试用

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中国心理卫生杂志 2008年第5期22卷 327-329页

作者：李晓明傅小兰邓国峰中国科学院心理研究所脑与认知科学国家重点实验室北京100101 湖南师范大学心理学系长沙410081 桂林电子科技大学桂林541004

目的：考察中文简化版PAD情绪量表在中国大学生群体中的适用性。方法：选取北京地区1000名大学本科生为被试,采用信度分析、项目分析和验证性因素分析考察量表的内部一致性信度和结构效度。结果：愉悦度、激活度和优势度的内部一致性信... 详细信息

目的：考察中文简化版PAD情绪量表在中国大学生群体中的适用性。方法：选取北京地区1000名大学本科生为被试,采用信度分析、项目分析和验证性因素分析考察量表的内部一致性信度和结构效度。结果：愉悦度、激活度和优势度的内部一致性信度分别为0.85、0.58和0.72;各项目与其所属维度的相关介于0.641-0.872之间（P〈0.01）;三因子模型的验证性因素分析的各项拟合指数为,χ^2/df=50.46,RMSEA=0.079,NNFI=0.90,NFI=0.92,CFI=0.93,GFI=0.95。结论：愉悦度和优势度的内部一致性信度较高,激活度的内部一致性信度较低;量表具有较好的结构效度。

关键词：大学生简化版PAD情绪量表心理测量学研究

2,6-二(2'-咪唑啉-2'-基)吡啶合铬(Ⅲ)的合成及其与DNA的相互作用

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应用化学 2010年第9期27卷 1032-1037页

作者：张金艳肖小明蒋艳谭年元湖南师范大学化学化工学院长沙410081 湖南工程学院化学化工学院

在微波辐射和无催化剂条件下,由吡啶2,6-二甲酸与乙二胺反应合成了2,6-二(2'-咪唑啉-2'-基)吡啶(L),采用常规加热法合成其配合物[CrL2][NO3]3。用核磁共振、红外光谱、元素分析、热重分析和摩尔电导率测试技术对其进行表征分析。通过紫... 详细信息

在微波辐射和无催化剂条件下,由吡啶2,6-二甲酸与乙二胺反应合成了2,6-二(2'-咪唑啉-2'-基)吡啶(L),采用常规加热法合成其配合物[CrL2][NO3]3。用核磁共振、红外光谱、元素分析、热重分析和摩尔电导率测试技术对其进行表征分析。通过紫外吸收光谱和黏度测试,分别考察了配体及配合物与DNA的键合常数及其作用方式。结果表明,配体L以氢键和沟面作用方式与DAN键合,而配合物以氢键和静电作用模式与DNA键合。密度泛函理论(DFT)计算结果较好的解释了L及[CrL2]3+与DNA的相互作用模式。

关键词：二(咪唑啉基)吡啶铬配合物 DNA 微波辐射 DFT