检索结果-南通市图书馆

连续性血液净化(CBP)治疗重症心力衰竭合并肾衰竭患者的临床疗效探究

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

科技与健康 2024年第18期3卷 37-40页

作者：康俊杰贵州省黔南布依族苗族自治州人民医院重症医学科贵州黔南550100

分析连续性血液净化(continuous blood purification,CBP)治疗重症心力衰竭合并肾衰竭患者的临床疗效。选取2022年2月—2023年2月于医院接受治疗的50例重症心力衰竭合并肾衰竭患者为研究对象,随机将其分为对照组和观察组,每组各25例。... 详细信息

分析连续性血液净化(continuous blood purification,CBP)治疗重症心力衰竭合并肾衰竭患者的临床疗效。选取2022年2月—2023年2月于医院接受治疗的50例重症心力衰竭合并肾衰竭患者为研究对象,随机将其分为对照组和观察组,每组各25例。对照组实施硝酸甘油治疗,观察组实施CBP治疗,对比两组患者的治疗效果、心功能指标以及肾功能指标。结果显示,观察组治疗效果、治疗后心脏功能指标以及肾功能指标均优于对照组(P<0.05)。研究发现,CBP治疗重症心力衰竭合并肾衰竭患者效果显著,可优化患者的治疗效果,改善患者的心脏功能指标以及肾功能指标,建议临床推广。

关键词：连续性血液净化重症心力衰竭肾衰竭临床疗效

Dynamics and de-spin control of massive target by single tethered space tug

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2019年第3期32卷 653-659页

作者： junjie kang Zheng H.ZHU Wei WANG Changqing WANG Aijun LI Department of Earth and Space Science and Engineering York University School of Automation Northwestern Polytechnical University Department of Mechanical Engineering York University

This paper investigates the dynamics and de-spin control of a massive target by a single tethered space tug in the post-capture phase. The dynamic model of the tethered system is derived and simplified to a dimensionless form. Further, a decoupled PD controller is proposed, and the local stability of the controller is analyzed by linearization technique. Parametric studies of the dynamics and de-spin control of a massive target are conducted to characterize the dynamic process of de-spin with the proposed control law. It is shown that the massive target can be de-span by a single and small space tug with limited thrust within finite time. The thrust tangent with the tether de-spins the target while the thrust normal to the tether prevents the tether from winding up the target. The tether length has a positive contribution to the de-spin of a target. The longer tether leads to a faster de-spin process.

关键词： De-spin Dynamics PD control Space tethers Tethered tug

Hot top electromagnetic casting research of Al thin slab

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1999年第3期9卷 605-610页

作者： Zhang Xingguo(张兴国) Tian Zhenghong(田正宏) kang junjie(康? ?) Jin Junze(金俊泽) Dalian Univ Technol Foundry Engn Res Ctr Dalian 116024 Peoples R China

The hot top EMC (electromagnetic casting) method was put forward, namely, the shape of top liquid column was formed by the hot top in the screen and the semi suspended liquid column was formed by the electromagnetic force nearby the liquid solid interface frontier. Using the numerical simulating technique, the temperature distribution was discussed, the effect of parameters such as upper conduct distance (UCD), cooling water rate of flow, pouring temperature and liquid column height on casting velocity were studied, the relationship among them was confirmed finally. According to the calculated results, the hot top EMC shaping system was designed and a lot of experiments were performed. The pure Al thin slabs of 480 mm×20 mm×850 mm were made successfully. The result showed that the casting velocity curve obtained experimentally almost coincides to the calculated one.

关键词： electromagnetic forming casting velocity thin slabs Document code: A

Watts-level ultraviolet-CLED integrated light sources for efficient surface and air sterilization

在线全文

学校读者我要写书评

暂无评论

Journal of Semiconductors 2022年第7期43卷 61-67页

作者： Wei Luo Tai Li Yongde Li Houjin Wang Ye Yuan Shangfeng Liu Weiyun Wang Qi Wang junjie kang Xinqiang Wang Songshan Lake Materials Laboratory Dongguan 523808China State Key Laboratory of Artificial Microstructure and Mesoscopic Physics School of Physics Nano-Optoelectronics Frontier Center of Ministry of EducationPeking UniversityBeijing 100871China Dongguan Institute of Opto-Electronics Peking UniversityDongguan 523808China

With the epidemic of the coronavirus disease(COVID-19) infection, AlGaN-based ultraviolet-C light emitting diodes(UVC-LEDs) have attracted widespread attention for their sterilization application. However, the sterilization characters of high power integrated light sources(ILSs) haven’t been widely investigated before utilizing in public sanitary security. In this work,by integrating up to 195 UVC-LED chips, high power UVC-LED ILSs with a light output power(LOP) of 1.88 W were demonstrated. The UVC-LED ILSs were verified to have efficient and rapid sterilization capability, which have achieved more than99.9% inactivation rate of several common pathogenic microorganisms within 1 s. In addition, the corresponding air sterilization module based on them was also demonstrated to kill more than 97% of Staphylococcus albus in the air of 20 m3 confined room within 30 min. This work demonstrates excellent sterilization ability of UVC-LED ILSs with high LOP, revealing great potential of UVC-LEDs in sterilization applications in the future.

关键词： ultraviolet-C LED integrated light source surface sterilization air sterilization

Mechanical behavior of rock under uniaxial tension:Insights from energy storage and dissipation

在线全文

学校读者我要写书评

暂无评论

Journal of Rock Mechanics and Geotechnical Engineering 2024年第7期16卷 2466-2481页

作者： Guanshuang Tan Chunde Ma junjie Zhang Wenyuan Yang Guiyin Zhang Zihao kang School of Resources and Safety Engineering Central South UniversityChangsha410083China

Many rock engineering projects show that the growth of tensile cracks is often an important cause of engineering disasters,and the mechanical behavior of rocks is essentially the transmission,storage,dissipation and release of *** investigate the tensile behavior of rock from the perspective of energy,uniaxial tension tests(UTTs)and uniaxial compression tests(UCTs)were carried out on three typical rocks(granite,sandstone and marble).Different unloading points were set before the peak stress to separate elastic energy and dissipated *** input energy density ut,elastic energy density ue,and dissipated energy density ud at each unloading point were calculated by integrating stress-strain *** results show that there is a strong linear relationship between the three energy parameters and the square of the unloading stress in UCT,but this linear relationship is weaker in *** ue and ud increase linearly with the increase in ut in UCT and *** on the phenomenon that ue and ud increase linearly with ut,the applicability of W_(et)^(p) index in UTT was proved and the relative energy storage capacity and absolute energy distribution characteristics of three rocks in UCT and UTT were *** tensile behavior of marble and sandstone in UTT can be divided into two stages vaguely according to the energy distribution,but granite is not the *** addition,based on dissipated energy,the damage evolution of three types of rocks in UCT and UTT was *** study provides some new insights for understanding the tensile behavior of rock.

关键词： Uniaxial tension Energy density Mechanical behavior Energy storage coefficient Energy dissipation coefficient

Dual-ion carrier storage through Mg^(2+) addition for high-energy and long-life zinc-ion hybrid capacitor

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2024年第1期31卷 179-185页

作者： junjie Zhang Xiang Wu School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China

Cation additives can efficiently enhance the total electrochemical capabilities of zinc-ion hybrid capacitors (ZHCs).However their energy storage mechanisms in zinc-based systems are still under ***,we modulate the electrolyte and achieve dual-ion storage by adding magnesium *** we assemble several Zn//activated carbon devices with different electrolyte concentrations and investigate their electrochemical reaction dynamic *** zinc-ion capacitor with Mg^(2+)mixed solution delivers 82 mAh·g^(-1)capacity at 1 A·g^(-1) and maintains 91%of the original capacitance after 10000 *** is superior to the other assembled zinc-ion devices in single-component *** finding demonstrates that the double-ion storage mechanism enables the superior rate performance and long cycle lifetime of ZHCs.

关键词： zinc-ion hybrid capacitor MgSO_(4) electrolyte rate performance storage mechanism

Quasi-solid-state nanocrystalline TiO2 solar cells using gel network polymer electrolytes based on polysiloxanes

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2003年第7期48卷 646-648页

作者： LI Weiying, kang junjie, LI Xueping, FANG Shibi, LIN Yuan, WANG Guiqiang & XIAO Xurui Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China Center for Molecular Science Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China

A quasi-solid-state dye-sensitized nanocrystal-line porous TiO2 film solar cell was fabricated using a novel gel network polymer electrolyte based on polysiloxanes with both polyethylene oxide internal plasticized side chains and quaternary ammonium groups. The cell exhibited better photoelectrical conversion performance under 60 mW/cm2 irradiation. The short photocurrent (Isc) of 5.0 mA/cm2 and open voltage (Voc) of 0.68 V were achieved, and the energy conversion efficiency (h ) and fill factor (ff) were 3.4% and 0.60, respectively.

关键词：类固态TiO2太阳能电池凝胶网状聚合体电解液染色敏化二氧化钛薄膜

Adaptive RISE Control of Winding Tension with Active Disturbance Rejection

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2024年第4期37卷 135-145页

作者： junjie Mi Jianyong Yao Wenxiang Deng School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing 210094China

A winding system is a time-varying system that considers complex nonlinear characteristics,and how to control the stability of the winding tension during the winding process is the primary problem that has hindered development in this field in recent *** nonlinear factors affect the tension in the winding process,such as friction,structured uncertainties,unstructured uncertainties,and external *** terms severely restrict the tension tracking *** tension control strategies are mainly based on the composite control of the tension and speed loops,and previous studies involve complex decoupling *** to the large number of calculations required for this method,it is inconvenient for practical engineering *** simplify the tension generation mechanism and the influence of the nonlinear characteristics of the winding system,a simpler nonlinear dynamic model of the winding tension was *** adaptive method was applied to update the feedback gain of the continuous robust integral of the sign of the error(RISE).Furthermore,an extended state observer was used to estimate modeling errors and external *** model disturbance term can be compensated for in the designed RISE *** asymptotic stability of the system was proven according to the Lyapunov stability ***,a comparative analysis of the proposed nonlinear controller and several other controllers was *** results indicated that the control of the winding tension was significantly enhanced.

关键词： Winding tension Continuous robust integral of the sign of the error(RISE)control Adaptive control Disturbance compensation Extended state observer(ESO) Tension control

Accuracy of numerical relativity waveforms with respect to space-based gravitational wave detectors

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2024年第1期76卷 82-95页

作者： Zun Wang junjie Zhao Zhoujian Cao Institute for Frontiers in Astronomy and Astrophysics Beijing Normal UniversityBeijing 102206China Department of Astronomy Beijing Normal UniversityBeijing 100875China School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced StudyUCASHangzhou 310024China

As with the laser interferometer gravitational-wave observatory(LIGO),the matched filtering technique will be critical to the data analysis of gravitational wave detection by space-based detectors,including LISA,Taiji and *** templates are the basis for such matched filtering *** construct ready-to-use waveform templates,numerical relativity waveforms are a starting ***,the accuracy issue of numerical relativity waveforms is critically *** are many investigations regarding this issue with respect to *** unfortunately there are few results on this issue with respect to space-based *** current paper investigates this *** results indicate that the existing numerical relativity waveforms are as accurate as 99%with respect to space-based detectors,including LISA,Taiji and *** an accuracy level is comparable to that with respect to LIGO.

关键词： numerical relativity gravitational wave binary black hole