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Fiber Grating Sensor with Enhanced Pressure and Temperature Sensitivity

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Chinese Physics Letters 2000年第2期17卷 115-116页

作者： liu yun-qi GUO Zhuan-yun liu Zhi-Guo ZHAO Dong-Hui GE Chun-Feng DONG Xiao-Yi Institute of Modern Optics Nankai UniversityTianjin 300071

A technique is used to enhance the pressure and temperature sensitivity of a fiber Bragg grating *** grating is packaged by using polymer jacket,which exhibits no significant chirp due to the adoption of the special *** measured pressure and temperature sensitivity of the structured grating is 6.28×10^(-5)/MPa and5.18×10^(-5)/℃.The wavelength shift due to pressure and temperature can be enhanced about 31.5 times for pressure and 7.7 times for temperature.

关键词： technique temperature fiber

Emergency management capacity assessment for urban rail transit-an example of Beijing Metro Line 13

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Transportation Safety and Environment 2024年第1期6卷 109-115页

作者： Jiao liu yun qi Wei Wang School of Emergency Management and Safety Engineering China University of Mining&Technology(Beijing)Beijing 100083China China Safety Science Journal Editorial Department China Occupational Safety and Health AssociationBeijing 100011China College of mechanical engineering and automation Liaoning University of TechnologyJinzhou 121001LiaoningChina

In order to improve the emergency management capability of urban rail transit system and reduce accidents during metro operation,an emergency management capability evaluation method combining analytic hierarchy process(AHP)and technique for order preference by similarity to ideal solution(TOPSIS)is *** on the Prevention Preparation Response Recovery(PPRR)model,factors influencing the emergency management capability of the urban rail transit system are summarized from the perspective of‘human,machine,environment and management’.Then,an emergency management capability evaluation index system containing of 20 secondary indicators is constructed in four stages:emergency prevention,emergency preparation,emergency response and emergency *** weights of indicators are calculated using the AHP method,and the closeness of each indicator to the optimal solution is analysed with the TOPSIS ***,take the Beijing Metro Line 13 as an example to investigate the level of emergency management capability of urban rail *** results show that the emergency management capability of Beijing’s urban rail transit system is‘well’,among which hazard prevention measures(0.31)and emergency response team(0.34)have a greater weight on the emergency management capability of rail *** model can more accurately assess the emergency management capability of urban rail transit and provide a basis for emergency management.

关键词： urban rail transit emergency management capability analytic hierarchy process(AHP) technique for order preference by similarity to ideal solution(TOPSIS) prevention preparation response recovery(PPRR)model

微循环阻力指数联合左室舒张末期压力指数预测急性心肌梗死患者预后的价值

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吉林医学 2024年第9期45卷 2073-2077页

作者：刘启云李江华刘华东尹达罗林杰深圳市人民医院、暨南大学第二临床医学院、南方科技大学第一附属医院心内科、深圳市心血管微创医学工程技术研究开发中心广东深圳518020

目的:探讨急性ST段抬高型心肌梗死(STEMI)患者中联合测量微血管阻力指数(IMR)和左室舒张末期压力(LVEDP)对介入治疗(PCI)患者预后的价值。方法:选取2019年3月~2021年10月深圳市人民医院收治的STEMI患者73例,行急诊血运重建治疗。在直接... 详细信息

目的:探讨急性ST段抬高型心肌梗死(STEMI)患者中联合测量微血管阻力指数(IMR)和左室舒张末期压力(LVEDP)对介入治疗(PCI)患者预后的价值。方法:选取2019年3月~2021年10月深圳市人民医院收治的STEMI患者73例,行急诊血运重建治疗。在直接PCI结束时进行IMR和LVEDP测量,根据结果分为低LVEDP/低IMR组(n=24),高LVEDP/低IMR组(n=14),低LVEDP/高IMR组(n=19),高LVEDP/高IMR组(n=16)。对术后住院期间及术后3个月时的心脏功能指标、随访起病之后1年时主要不良心脏事件(MACE)进行统计学分析。结果:入选STEMI患者均成功行再灌注治疗,术后TIMI血流均为Ⅲ级。四组比较,运重建治疗之后住院期间EF值比较差异无统计学意义(P>0.05)。血运重建治疗之后3个月,高LVEDP/高IMR组EF值低于其他组,差异有统计学意义(P0.05);术后及术后3个月,高LVEDP/高IMR组NT-proBNP值均高于其他组,差异有统计学意义(P0.05)。1年随访MACE发生率,高LVEDP/高IMR组的发生率显著升高,与其他三组比较,差异有统计学意义(P<0.05)。结论:IMR联合LVEDP可以明显提高对STEMI患者直接经皮冠状动脉介入治疗预后的预测价值。

关键词：急性ST段抬高型心肌梗死微血管阻力指数左室舒张末期压力冠状动脉介入治疗预后

A functionalized activated carbon adsorbent prepared from waste amidoxime resin by modifying with H_(3)PO_(4) and ZnCl_(2) and its excellent Cr(Ⅵ)adsorption

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International Journal of Minerals,Metallurgy and Materials 2024年第3期31卷 585-598页

作者： Chunlin He yun liu Mingwei qi Zunzhang liu Yuezhou Wei Toyohisa Fujita Guifang Wang Shaojian Ma Wenchao Yang School of Resources Environment and MaterialsGuangxi UniversityNanning 530004China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Guangxi UniversityNanning 530004China School of Nuclear Science and Technology University of South ChinaHengyang 421000China School of Nuclear Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Key Laboratory of New Low-carbon Green Chemical Technology Education Department of Guangxi Zhuang Autonomous RegionNanning 530004China

With the application of resins in various fields, numerous waste resins that are difficult to treat have been produced. The industrial wastewater containing Cr(Ⅵ) has severely polluted soil and groundwater environments, thereby endangering human health. Therefore, in this paper, a novel functionalized mesoporous adsorbent PPR-Z was synthesized from waste amidoxime resin for adsorbing Cr(Ⅵ). The waste amidoxime resin was first modified with H3PO4 and ZnCl_(2), and subsequently, it was carbonized through slow thermal decomposition. The static adsorption of PPR-Z conforms to the pseudo-second-order kinetic model and Langmuir isotherm, indicating that the Cr(Ⅵ) adsorption by PPR-Z is mostly chemical adsorption and exhibits single-layer adsorption. The saturated adsorption capacity of the adsorbent for Cr(Ⅵ) could reach 255.86 mg/g. The adsorbent could effectively reduce Cr(Ⅵ) to Cr(Ⅲ) and decrease the toxicity of Cr(Ⅵ) during adsorption. PPR-Z exhibited Cr(Ⅵ) selectivity in electroplating wastewater. The main mechanisms involved in the Cr(Ⅵ) adsorption are the chemical reduction of Cr(Ⅵ) into Cr(Ⅲ) and electrostatic and coordination interactions. Preparation of PPR-Z not only solves the problem of waste resin treatment but also effectively controls Cr(Ⅵ) pollution and realizes the concept of “treating waste with waste”.

关键词： waste amidoxime resin mesoporous adsorbent H_(3)PO_(4)and ZnCl_(2)processing Cr(VI)adsorption electroplating wastewater

Effect of crystal morphology of ultrahigh-nickel cathode materials on high temperature electrochemical stability of lithium ion batteries

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Journal of Energy Chemistry 2024年第1期88卷 327-335,I0008页

作者： Bi Luo Hui Li Haoyu qi yun liu Chuanbo Zheng Weitong Du Jiafeng Zhang Lai Chen School of Metallurgy Engineering Jiangsu University of Science and TechnologyZhangjiagang 215600JiangsuChina National Engineering Laboratory for High-Efficiency Recovery of Refractory Nonferrous Metals School of Metallurgy and EnvironmentCentral South UniversityChangsha 410083HunanChina School of Materials Science and Engineering Beijing Key Laboratory of Environmental Science and EngineeringBeijing Institute of TechnologyBeijing 100081China

Higher nickel content endows Ni-rich cathode materials LiNi_(x)Co_yMn_(1-x-y)O_(2)(x>0.6)with higher specific capacity and high energy density,which is regarded as the most promising cathode materials for Li-ion ***,the deterioration of structural stability hinders its practical application,especially under harsh working conditions such as high-temperature *** these circumstances,it becomes particularly critical to clarify the impact of the crystal morphology on the structure and high-temperature performance as for the ultrahigh-nickel ***,we conducted a comprehensive comparison in terms of microstructure,high-temperature long-cycle phase evolution,and high-temperature electrochemical stability,revealing the differences and the working mechanisms among polycrystalline(PC),single-crystalline(SC)and Al doped SC ultrahigh-nickel *** results show that the PC sample suffers a severe irreversible phase transition along with the appearance of microcracks,resulting a serious decay of both average voltage and the energy *** the Al doped SC sample exhibits superior cycling stability with intact layered ***-situ XRD and intraparticle structural evolution characterization reveal that Al doping can significantly alleviate the irreversible phase transition,thus inhibiting microcracks generation and enabling enhanced ***,it exhibits excellent cycling performance in pouch-type full-cell with a high capacity retention of 91.8%after 500 cycles at 55℃.This work promotes the fundamental understanding on the correlation between the crystalline morphology and high-temperature electrochemical stability and provides a guide for optimization the Ni-rich cathode materials.

关键词： Single-crystalline Ultrahigh-nickel cathode High-temperature performance Phase evolution

High-performance Si/VO_(2)-nanorod heterojunction photodetector based on photothermoelectric effect for detecting human radiation

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Rare Metals 2024年第3期43卷 1177-1185页

作者： Fu-Hai Guo Lan-Zhong Hao Wei-Zhuo Yu Si-qi Li Guan-Chu liu Jing-Yi Hao yun-Jie liu College of Science China University of PetroleumQingdao266580China School of Materials Science and Engineering China University of PetroleumQingdao266580China

As a typical candidate of optoelectronic materials,vanadium dioxide(VO_(2))has wide applications in photodetectors(PDs),but is still challenging in largely enhancing the photodetecting performance for low-power human ***,high-performance Si/VO_(2)nanorods(NRs)heterojunction PDs based on the photothermoelectric(PTE)effect are *** uniform VO_(2)-NRs array films were deposited on Si by using magnetron sputtering technique,and a Si/VO_(2)heterojunctions were *** device exhibits a four-stage photoresponse and broadband photoresponse from ultraviolet to long-wavelength *** from the unique nanorods structure and the strong PTE effect,the fabricated device exhibits a large enhancement of the photodetecting performance,showing an ultrahigh photodetectivity of 1.6×10^(13)Jones and ultrafast response rates with a risingedge time of~65.0μs,three orders of magnitude higher than other VO_(2)-based ***,the device exhibits unique abilities to detect human radiation even when the human fingers are far away from the device surface up to 10.0 ***,the fabricated Si/VO_(2)devices can also be applied as breath sensors to distinguish different breathing *** results supply an effective route to design high-performance photodetectors toward detecting human thermal radiation and respiration.

关键词： Vanadium dioxide Heterojunction Photodetector Photothermoelectric Human radiation and respiration sensing

Recombinant human growth hormone secreted from tissue-engineered bioartificial muscle improves left ventricular function in rat with acute myocardial infarction

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Chinese Medical Journal 2009年第19期122卷 2352-2359页

作者： RONG Shu-ling WANG Yong-jin WANG Xiao-lin LU Yong-xin CHANG Chao WANG Feng-zhi liu qi-yun liu Xiang-yang GAO Yan-zhang MI Shao-hua Department of Cardiology Heping Hospital Changzhi Medical College Changzhi Shanxi 046000 China Department of Paediatrics Heping Hospital Changzhi Medical College Changzhi Shanxi 046000 China Department of Cardiology Union Hospital Tongji Medical College Huazhong University of Science and Tecnology Wuhan Hubei 430022 China Department of Cardiology Second Hospital of Shanxi Medical University Taiyuan Shanxi 030001 China

Background Experimental studies and preliminary clinical studies have suggested that growth hormone （GH） treatment may improve cardiovascular parameters in chronic heart failure （CHF）. Recombinant human GH （rhGH） has been delivered by a recombinant protein, by plasmid DNA, and by genetically engineered cells with different pharmacokinetic and physiological properties. The present study aimed to examine a new method for delivery of rhGH using genetically modified bioartificial muscles （BAMs）, and investigate whether the rhGH delivered by this technique improves left ventricular （LV） function in rats with CHE Methods Primary skeletal myoblasts were isolated from several Sprague-Dawley （SD） rats, cultured, purified, and retrovirally transduced to synthesize and secrete human rhGH, and tissue-engineered into implantable BAMs. Ligation of the left coronary artery or sham operation was performed. The rats that underwent ligation were randomly assigned to 2 groups： CHF control group （n=6） and CHF treatment group （n=6）. The CHF control group received non-rhGH-secreting BAM （GFP-BAMs） transplantation, and the CHF treatment group received rhGH-secreting BAM （GH-BAMs） transplantation. Another group of rats served as the sham operation group, which was also randomly assigned to 2 subgroups： sham control group （n=6） and sham treatment group （n=6）. The sham control group underwent GFP-BAM transplantation, and the sham treatment group underwent GH-BAM transplantation. GH-BAMs and GFP-BAMs were implanted subcutaneously into syngeneic rats with ligation of the left coronary artery or sham operation was performed. Eight weeks after the treatment, echocardiography was performed, hGH, insulin-like growth factor-1 （IGF-1） and TNF-a levels in rat serum were measured by radioimmunoassay and ELISA, and then the rats were killed and ventricular samples were subjected to immunohistochemistry. Results Primary rat myoblasts were retrovirally transduced to secrete rhGH and tissue-engineered int

关键词： heart failure muscles growth hormone gene therapy

Recombinant proteins secreted from tissue-engineered bioartificial muscle improve cardiac dysfunction and suppress cardiomyocyte apoptosis in rats with heart failure

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Chinese Medical Journal 2010年第24期123卷 3626-3633页

作者： RONG Shu-ling WANG Yong-jin WANG Xiao-lin LU Yong-xin WU Yin liu qi-yun MI Shao-hua XU Yu-lan Department of Cardiology Heping Hospital Changzhi Medical College Changzhi Shanxi 046000 China Department of Paediatrics Heping Hospital Changzhi Medical College Changzhi Shanxi 046000 China Department of Cardiology Union Hospital Tongji Medical College Huazhong University of Science and Tecnology Wuhan Hubei 430022 China Department of Psychology School of Educational Science South China Normal University Guangzhou Guangdong 510631 China

Background Tissue-engineered bioartificial muscle-based gene therapy represents a promising approach for the treatment of heart diseases. Experimental and clinical studies suggest that systemic administration of insulin-like growth factor-1 （IGF-1） protein or overexpression of IGF-1 in the heart exerts a favorable effect on cardiovascular function. This study aimed to investigate a chronic stage after myocardial infarction （MI） and the potential therapeutic effects of delivering a human IGF-1 gene by tissue-engineered bioartificial muscles （BAMs） following coronary artery ligation in Sprague-Dawley *** Ligation of the left coronary artery or sham operation was performed. Primary skeletal myoblasts were retrovirally transduced to synthesize and secrete recombinant human insulin-like growth factor-1 （rhIGF-1）, and green fluorescent protein （GFP）, and tissue-engineered into implantable BAMs. The rats that underwent ligation were randomly assigned to 2 groups： MI-IGF group （n=6） and MI-GFP group （n=6）. The MI-IGF group received rhIGF-secreting BAM （IGF-BAMs） transplantation, and the MI-GFP group received GFP-secreting BAM （GFP-BAMs） transplantation. Another group of rats served as the sham operation group, which was also randomly assigned to 2 subgroups： S-IGF group （n=6）and S-GFP group （n=6）. The S-IGF group underwent IGF-1-BAM transplantation, and S-GFP group underwent GFP-BAM transplantation. IGF-1-BAMs and GFP-BAMs were implanted subcutaneously into syngeneic rats after two weeks of operation was performed. Four weeks after the treatment, hemodynamics was performed. IGF-1 was measured by radioimmunoassay, and then the rats were sacrificed and ventricular samples were subjected to immunohistochemistry. Reverse transcriptase-polymerase chain reaction （RT-PCR） was used to examine the mRNA expression of bax and Bcl-2. TNF-α and caspase 3 expression in myocardium was examined by Western *** Primary rat myoblasts were retrovirally transduced to secre

关键词： heart failure muscles insulin-like growth factor-1 gene therapy

Effect of lanthanum on inclusions in non-oriented electrical steel slabs

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Journal of Iron and Steel Research International 2024年第7期31卷 1680-1691页

作者： qiang Ren Zhi-yuan Hu yun-xia liu Wei-cheng Zhang Zi-qi Gao Li-feng Zhang School of Mechanical Engineering Yanshan UniversityQinhuangdao 066004HebeiChina School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Research and Development Department Shougang Zhixin Qian'an Electromagnetic Material Co.Ltd.Qian'an 064400HebeiChina School of Mechanical and Materials Engineering North China University of TechnologyBeijing 100144China

The effect of lanthanum on the characteristics of inclusions in the slab of non-oriented electrical steels was investigated through industrial trials and thermodynamic *** number,size,and chemical composition of inclusions in the surface,one-quarter of thickness and the center of slabs with and without lanthanum addition were statistically analyzed using an automatic inclusion analysis *** the lanthanum-free slab,inclusions were predominately ***_(2)O_(3),MgO,and AlN as well as a small number of Al_(2)O_(3)-MgO-CaO and *** number densities of oxide inclusions and AlN decreased from the surface to the center of the slab,which was ascribed to the difference in cooling intensity during the continuous *** the steel with lanthanum addition,inclusions were modified into LaAlO_(3) and La_(2)O_(2)S and gradually transformed into dual-phase MgO-La_(2)S3 with an increasing distance from the slab surface due to the reaction between the lanthanum-containing inclusion and the steel *** uneven distribution of oxide inclusions along the thickness of the slab was eliminated in the lanthanum-bearing slab because the dissolved oxygen was remarkably decreased by ***-bearing inclusions were more likely to agglomerate AlN by inducing the heterogeneous nucleation of AlN on their surface,while small-size ***_(2)O_(3) inclusions hardly showed a coarsening effect on the size of AlN.

关键词： Lanthanum-Inclusion Non-oriented electrical steel Aluminum nitride Heterogenous nucleation