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基于RFID的医疗设备远程管理系统设计 被引量:3
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作者 向明华 赵菊云 +1 位作者 向国华 吴玲 《自动化技术与应用》 2024年第3期62-65,135,共5页
为提高医院内设备定位精度,设计基于RFID的医疗设备远程管理系统。通过阅读器、电子标签和处理器组成RFID节点,引入AS3992芯片作为核心芯片,实现数据处理和编码,执行远程指令。采用自由空间传播模型计算路径损耗产生值,通过三角定位数... 为提高医院内设备定位精度,设计基于RFID的医疗设备远程管理系统。通过阅读器、电子标签和处理器组成RFID节点,引入AS3992芯片作为核心芯片,实现数据处理和编码,执行远程指令。采用自由空间传播模型计算路径损耗产生值,通过三角定位数学方法计算待定标签位置,采用RFID定位方法确定标签的最近邻居,实现医疗设备的远程定位。实验结果表明,在没有障碍物的情况下,所提系统设备定位误差少于1 m,在有障碍物的情况下,定位误差在2 m左右,证明所提出系统定位准确性较高,满足系统的设计需求。 展开更多
关键词 RFId 医疗设备远程管理 路径损耗 A/d转换
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Applications of carbonic acid solution for developing conversion coatings on Mg alloy 被引量:6
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作者 余秉隆 林俊凱 汪俊延 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第7期1331-1339,共9页
Works on exploring an environmentally clean method for producing an Mg,Al-hydrotalcite(Mg6Al2(OH) 16CO3·4H2O) layer and/or calcium carbonate(CaCO3) layer on Mg alloy in a carbonic acid solution system(aqueous HCO... Works on exploring an environmentally clean method for producing an Mg,Al-hydrotalcite(Mg6Al2(OH) 16CO3·4H2O) layer and/or calcium carbonate(CaCO3) layer on Mg alloy in a carbonic acid solution system(aqueous HCO3-/CO3 2-or Ca 2+ /HCO3-) at 50℃ were reviewed.Conversion treatment for the Mg,Al-hydrotalcite conversion coating was as follows.Mg alloy was treated first in acidic HCO3-/CO3 2-aqueous for precursor layer formation on Mg alloy surface and then in alkaline HCO3-/CO3 2-aqueous to form a crystallized Mg,Al-hydrotalcite coating.Duration of an Mg,Al-hydrotalcite coating on Mg alloy surface was reduced from 12 h to 4 h by the conversion treatment.On the other hand,for reducing the formation time of CaCO3 coating on Mg alloy,the aqueous Ca 2+ /HCO3-with a saturated Ca 2+ content was employed for developing a CaCO3 coating on Mg alloy.A dense CaCO3 coating could yield on Mg alloy surface in 2 h.Corrosion rate(corrosion current density,Jcorr) of the Mg,Al-hydrotalcite-coated sample and CaCO3-coated AZ91D sample was 7-10μA/cm 2,roughly two orders less than the Jcorr of the as-diecast sample(about 200μA/cm 2) . No corrosion spot on the Mg,Al-hydrotalcite-coated sample and CaCO3-coated sample was observed after 72 h and 192 h salt spray test,respectively. 展开更多
关键词 Mg alloy AZ91d alloy CORROSION conversion coating carbonic acid
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A transceiver frequency conversion module based on 3D micropackaging technology 被引量:4
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作者 LIU Boyuan WANG Qingping +1 位作者 WU Weiwei YUAN Naichang 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2020年第5期899-907,共9页
The idea of Ku-band transceiver frequency conversion module design based on 3D micropackaging technology is proposed. By using the double frequency conversion technology,the dual transceiver circuit from Ku-band to L-... The idea of Ku-band transceiver frequency conversion module design based on 3D micropackaging technology is proposed. By using the double frequency conversion technology,the dual transceiver circuit from Ku-band to L-band is realized by combining with the local oscillator and the power control circuit to complete functions such as amplification, filtering and gain. In order to achieve the performance optimization and a high level of integration of the Ku-band monolithic microwave integrated circuits(MMIC) operating chip, the 3 D vertical interconnection micro-assembly technology is used. By stacking solder balls on the printed circuit board(PCB), the technology decreases the volume of the original transceiver to a miniaturized module. The module has a good electromagnetic compatibility through special structure designs. This module has the characteristics of miniaturization, low power consumption and high density, which is suitable for popularization in practical application. 展开更多
关键词 KU-BANd frequency conversion 3d packaging CHIP electromagnetic compatibility
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Transcription factor-based gene therapy to treat glioblastoma through direct neuronal conversion 被引量:3
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作者 Xin Wang Zifei Pei +2 位作者 Aasma Hossain Yuting Bai Gong Chen 《Cancer Biology & Medicine》 SCIE CAS CSCD 2021年第3期860-874,共15页
Objective:Glioblastoma(GBM)is the most prevalent and aggressive adult primary cancer in the central nervous system.Therapeutic approaches for GBM treatment are under intense investigation,including the use of emerging... Objective:Glioblastoma(GBM)is the most prevalent and aggressive adult primary cancer in the central nervous system.Therapeutic approaches for GBM treatment are under intense investigation,including the use of emerging immunotherapies.Here,we propose an alternative approach to treat GBM through reprogramming proliferative GBM cells into non-proliferative neurons.Methods:Retroviruses were used to target highly proliferative human GBM cells through overexpression of neural transcription factors.Immunostaining,electrophysiological recording,and bulk RNA-seq were performed to investigate the mechanisms underlying the neuronal conversion of human GBM cells.An in vivo intracranial xenograft mouse model was used to examine the neuronal conversion of human GBM cells.Results:We report efficient neuronal conversion from human GBM cells by overexpressing single neural transcription factor Neurogenic differentiation 1(Neuro D1),Neurogenin-2(Neurog2),or Achaete-scute homolog 1(Ascl1).Subtype characterization showed that the majority of Neurog2-and Neuro D1-converted neurons were glutamatergic,while Ascl1 favored GABAergic neuron generation.The GBM cell-converted neurons not only showed pan-neuronal markers but also exhibited neuron-specific electrophysiological activities.Transcriptome analyses revealed that neuronal genes were activated in glioma cells after overexpression of neural transcription factors,and different signaling pathways were activated by different neural transcription factors.Importantly,the neuronal conversion of GBM cells was accompanied by significant inhibition of GBM cell proliferation in both in vitro and in vivo models.Conclusions:These results suggest that GBM cells can be reprogrammed into different subtypes of neurons,leading to a potential alternative approach to treat brain tumors using in vivo cell conversion technology. 展开更多
关键词 GLIOBLASTOMA neuronal conversion transcription factors Neuro d1 neurogenin-2 Ascl1
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Construction of 2D Zn‐MOF/BiVO_(4)S‐scheme heterojunction for efficient photocatalytic CO_(2) conversion under visible light irradiation 被引量:6
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作者 Zhenlong Zhao Ji Bian +6 位作者 Lina Zhao Hongjun Wu Shuai Xu Lei Sun Zhijun Li Ziqing Zhang Liqiang Jing 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2022年第5期1331-1340,共10页
The construction of S‐scheme heterojunction photocatalysts has been regarded as an effective avenue to facilitate the conversion of solar energy to fuel.However,there are still considerable challenges with regard to ... The construction of S‐scheme heterojunction photocatalysts has been regarded as an effective avenue to facilitate the conversion of solar energy to fuel.However,there are still considerable challenges with regard to efficient charge transfer,the abundance of catalytic sites,and extended light absorption.Herein,an S‐scheme heterojunction of 2D/2D zinc porphyrin‐based metal‐organic frameworks/BiVO_(4)nanosheets(Zn‐MOF/BVON)was fabricated for efficient photocatalytic CO_(2)conversion.The optimal one shows a 22‐fold photoactivity enhancement when compared to the previously reported BiVO4 nanoflake(ca.15 nm),and even exhibits~2‐time improvement than the traditional g‐C3N4/BiVO4 heterojunction.The excellent photoactivities are ascribed to the strengthened S‐scheme charge transfer and separation,promoted CO_(2)activation by the well‐dispersed metal nodes Zn_(2)(COO)_(4)in the Zn‐MOF,and extended visible light response range based on the results of the electrochemical reduction,electron paramagnetic resonance,and in‐situ diffuse reflectance infrared Fourier transform spectroscopy.The dimension‐matched Zn‐MOF/BVON S‐scheme heterojunction endowed with highly efficient charge separation and abundant catalytic active sites contributed to the superior CO2 conversion.This study offers a facile strategy for constructing S‐scheme heterojunctions involving porphyrin‐based MOFs for solar fuel production. 展开更多
关键词 BiVO4 nanosheet 2d zinc porphyrin‐based MOFs modification S‐scheme heterojunction Visible light catalysis CO_(2) conversion
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Design of a 20-Gsps 12-bit time-interleaved analog-to-digital conversion system 被引量:2
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作者 Ruo-Shi Dong Lei Zhao +4 位作者 Jia-Jun Qin Wen-Tao Zhong Yi-Chun Fan Shu-Bin Liu Qi An 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2021年第3期30-40,共11页
The time-interleaved analog-to-digital conversion(TIADC)technique is an effective method for increasing the sampling rate in a waveform digitization system.In this study,a 20-Gsps TIADC system was designed.A wide-band... The time-interleaved analog-to-digital conversion(TIADC)technique is an effective method for increasing the sampling rate in a waveform digitization system.In this study,a 20-Gsps TIADC system was designed.A wide-bandwidth performance was achieved by optimizing the analog circuits,and a sufficient effective number of bits(ENOB)performance guaranteed using the perfect reconstruction algorithm for mismatch error correction.The proposed system was verified by tests,and the results indicated that a-3 dB bandwidth of 6 GHz and the ENOB performance of 8.7 bits at 1 GHz and 7.6 bits at6 GHz were successfully achieved. 展开更多
关键词 Time-interleaved technique High-speed A/d conversion High bandwidth Mismatch error correction
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A new method to create depth information based on lighting analysis for 2D/3D conversion 被引量:1
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作者 Hyunho Han Gangseong Lee +2 位作者 Jongyong Lee Jinsoo Kim Sanghun Lee 《Journal of Central South University》 SCIE EI CAS 2013年第10期2715-2719,共5页
A new method creating depth information for 2D/3D conversion was proposed. The distance between objects is determined by the distances between objects and light source position which is estimated by the analysis of th... A new method creating depth information for 2D/3D conversion was proposed. The distance between objects is determined by the distances between objects and light source position which is estimated by the analysis of the image. The estimated lighting value is used to normalize the image. A threshold value is determined by some weighted operation between the original image and the normalized image. By applying the threshold value to the original image, background area is removed. Depth information of interested area is calculated from the lighting changes. The final 3D images converted with the proposed method are used to verify its effectiveness. 展开更多
关键词 LIGHTING ANALYSIS depth INFORMATION focus/defocus INFORMATION 2d/3d conversion
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A Universal Atomic Substitution Conversion Strategy Towards Synthesis of Large‑Size Ultrathin Nonlayered Two‑Dimensional Materials 被引量:2
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作者 Mei Zhao Sijie Yang +10 位作者 Kenan Zhang Lijie Zhang Ping Chen Sanjun Yang Yang Zhao Xiang Ding Xiaotao Zu Yuan Li Yinghe Zhao Liang Qiao Tianyou Zhai 《Nano-Micro Letters》 SCIE EI CAS CSCD 2021年第11期79-91,共13页
Nonlayered two-dimensional(2D)materials have attracted increasing attention,due to novel physical properties,unique surface structure,and high compatibility with microfabrication technique.However,owing to the inheren... Nonlayered two-dimensional(2D)materials have attracted increasing attention,due to novel physical properties,unique surface structure,and high compatibility with microfabrication technique.However,owing to the inherent strong covalent bonds,the direct synthesis of 2D planar structure from nonlayered materials,especially for the realization of large-size ultrathin 2D nonlayered materials,is still a huge challenge.Here,a general atomic substitution conversion strategy is proposed to synthesize large-size,ultrathin nonlayered 2D materials.Taking nonlayered CdS as a typical example,large-size ultrathin nonlayered CdS single-crystalline flakes are successfully achieved via a facile low-temperature chemical sulfurization method,where pre-grown layered CdI2 flakes are employed as the precursor via a simple hot plate assisted vertical vapor deposition method.The size and thickness of CdS flakes can be controlled by the CdI2 precursor.The growth mechanism is ascribed to the chemical substitution reaction from I to S atoms between CdI2 and CdS,which has been evidenced by experiments and theoretical calculations.The atomic substitution conversion strategy demonstrates that the existing 2D layered materials can serve as the precursor for difficult-to-synthesize nonlayered 2D materials,providing a bridge between layered and nonlayered materials,meanwhile realizing the fabrication of large-size ultrathin nonlayered 2D materials. 展开更多
关键词 Nonlayered 2d materials Large-size ultrathin CdS flakes Atomic substitution conversion Layered-nonlayered structural transformation
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A Distributed 2D-to-3D Video Conversion System 被引量:1
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作者 张哲斌 张吉安 +2 位作者 张学西 王亦洲 高文 《China Communications》 SCIE CSCD 2013年第5期30-38,共9页
2D-to-3D video conversion is a feasible way to generate 3D programs for the current 3DTV industry. However, for large-scale 3D video production, current systems are no longer adequate in terms of the time and labor re... 2D-to-3D video conversion is a feasible way to generate 3D programs for the current 3DTV industry. However, for large-scale 3D video production, current systems are no longer adequate in terms of the time and labor required for conversion. In this paper, we introduce a distributed 2D-to-3D video conversion system that includes a 2D-to-3D video conversion module, architecture of the parallel computation on the cloud, and 3D video coding in the system. The system enables cooperation among multiple users in the simultaneous completion of their conversion tasks so that the conversion efficiency is greatly promoted. In the experiments, we evaluate the system based on criteria related to both time consumption and video coding performance. 展开更多
关键词 3d video 2d-to-3d conversion distributed system
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“6D法则”在住院医师规范化培训院级师资培训中的探索和运用——以教学查房培训为例
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作者 何怀伟 师芸 +2 位作者 黄亚玲 柳琪林 韩一哲 《中国毕业后医学教育》 2024年第5期352-355,共4页
目的在住院医师规范化培训(简称住培)院级师资培训中引入“6 D法则”,推进师资培训的“三个转化”,即住培师资岗位需求的转化、培训内容的转化、师资内在的素质和能力的转化。方法以院级教学查房培训为例,将培训设计为准备、培训、转化... 目的在住院医师规范化培训(简称住培)院级师资培训中引入“6 D法则”,推进师资培训的“三个转化”,即住培师资岗位需求的转化、培训内容的转化、师资内在的素质和能力的转化。方法以院级教学查房培训为例,将培训设计为准备、培训、转化和评估4个阶段,实现培训后的转化以及培训质量的改善。结果基于“6 D法则”的教学查房培训过后,以教学督导的形式进行总结性评估。接受过教学查房培训的师资平均得分为90.00分,未接受过教学查房培训的师资平均得分为84.93分,培训达到了预期目标。结论“6 D法则”采用系统化思维方式,注重学习转化和绩效的改善,将以终为始的理念贯穿整个培训过程,有利于培训取得实效。 展开更多
关键词 师资培训 6 d法则 培训转化 教学查房
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Organic-magnesium complex conversion coating on AZ91D magnesium alloy
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作者 陈晓明 李光玉 连建设 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第B07期643-647,共5页
An organic-magnesium complex conversion(OMCC)coating on AZ91D magnesium alloy was obtained by treating in a solution containing organic compounds.SEM,FESEM and XPS were used to examine the surface morphology,thickness... An organic-magnesium complex conversion(OMCC)coating on AZ91D magnesium alloy was obtained by treating in a solution containing organic compounds.SEM,FESEM and XPS were used to examine the surface morphology,thickness and structure of the conversion coatings.The results show that the continuous and uniform conversion coating is deposited on AZ91D alloy and the main component of the coatings is organic compound containing benzene ring,which forms a chemical bond with magnesium.The polarization measurement and salt spray test show that the corrosion resistance of the conversion coating is much higher than that of traditional chromate conversion coating. 展开更多
关键词 chromium-free conversion coating organic compound CORROSION XPS AZ91d magnesium alloy
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D类音频功放的双声道转单声道电路设计 被引量:1
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作者 胡振宇 杨红姣 谢亮 《中国集成电路》 2024年第4期16-20,69,共6页
本文设计了一种适用于D类音频功放的双声道转单声道电路,可有效将立体声放大器转换为单声放大器。该电路有效降低了功放的输出阻抗,减小了输出功率管的耗散功率,提升了效率;同时,因其并行工作的原理,单声道模式的总承载电流增大,相同总... 本文设计了一种适用于D类音频功放的双声道转单声道电路,可有效将立体声放大器转换为单声放大器。该电路有效降低了功放的输出阻抗,减小了输出功率管的耗散功率,提升了效率;同时,因其并行工作的原理,单声道模式的总承载电流增大,相同总谐波失真下单声道模式的最大输出功率得到提升。 展开更多
关键词 d类功放 双声道转单声道 效率 最大输出功率
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Precise conversion between virtual world and real world in stereoscopic imaging
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作者 姚晓永 吴平东 黄漫玲 《Journal of Beijing Institute of Technology》 EI CAS 2013年第2期191-196,共6页
A method for precise conversion between virtual world and real world is put forward in this paper. The method aims to precisely establish the connection between the virtual coordinates and the real coordinates with Op... A method for precise conversion between virtual world and real world is put forward in this paper. The method aims to precisely establish the connection between the virtual coordinates and the real coordinates with OpenGL. In the virtual world, two virtual cameras are set to capture the left and right perspective planar images, and coordinates of the planar images can be calculated by the perspective projection model. With coordinates of planar images, coordinates of the stereo- scopic image synthesized in the real world can be calculated by the binocular observation model. Therefore, the corresponding connection between the two systems is established. Experimental re- suits match data from this method well. Therefore, this method can precisely realize the conversion and the interactivity, laying a solid foundation for further study. 展开更多
关键词 virtual world spatial coordinates OpenGL model 2d-to-3d conversion
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Method to Increase Micro-controller A/D Conversion Speed
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作者 唐鹤权 《Journal of Donghua University(English Edition)》 EI CAS 2004年第5期128-131,共4页
The speed and cost of A/D conversion are conflict to each other. As micro-controller speed is increasing and its internal function is improving, full utilization of its internal resource can dramatically increase A/D ... The speed and cost of A/D conversion are conflict to each other. As micro-controller speed is increasing and its internal function is improving, full utilization of its internal resource can dramatically increase A/D conversion speed and without compromising conversion quality. MSP430F11x1 series micro-controller is exploited to increase A/D conversion speed. 展开更多
关键词 Micro-controller A/d conversion Speed and cost.
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全细胞转化生产D-阿洛酮糖条件优化
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作者 吕志飞 张志伟 +7 位作者 李天罡 王松江 郭传庄 隋松森 连战 孙瑞成 董红梅 王建彬 《食品与发酵科技》 CAS 2024年第5期23-29,共7页
全细胞体系制备D-阿洛酮糖因成本低、工艺简单受到人们的关注,研究全细胞转化D-果糖为D-阿洛酮糖的较适条件对促进D-阿洛酮糖的产业化具有重要意义。该文探究了全细胞酶的储藏稳定性并对全细胞制备D-阿洛酮糖的条件(培养时间、细胞浓度... 全细胞体系制备D-阿洛酮糖因成本低、工艺简单受到人们的关注,研究全细胞转化D-果糖为D-阿洛酮糖的较适条件对促进D-阿洛酮糖的产业化具有重要意义。该文探究了全细胞酶的储藏稳定性并对全细胞制备D-阿洛酮糖的条件(培养时间、细胞浓度、转化初始pH、转化温度、金属离子)进行了优化与验证。结果表明:全细胞酶具有较强的储藏稳定性,40℃放置48 h催化效果未明显降低;在500 g/L D-果糖底物浓度下,适用于生产的全细胞转化较适条件为细胞浓度10 g/L、转化温度70℃、转化初始pH为自然pH、转化率为31.55%,较优化前转化率提高约3%,转化周期缩短至4 h,生产工序简化、生产效率提高、生产成本降低。该研究旨在为D-阿洛酮糖工业化生产提供实验基础,满足大规模生产的需求。 展开更多
关键词 d-阿洛酮糖 全细胞 条件优化 转化率 工业化
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Optical Analog-to-digital Conversion Scheme Based on Tunable Fabry-Perot Resonator
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作者 LI Zheng 《Semiconductor Photonics and Technology》 CAS 2007年第4期298-304,共7页
Proposed is an interference type of optical analog-to-digital conversion(ADC). The refractive index of Fabry-Perot cavity changes with different voltages. The Fabry-Perot resonator converts electronic intensity into l... Proposed is an interference type of optical analog-to-digital conversion(ADC). The refractive index of Fabry-Perot cavity changes with different voltages. The Fabry-Perot resonator converts electronic intensity into light wavelength through selecting lights of different wavelengthes. The parameters of the scheme are acquired with the transmission matrix of optical element and the time of steady-state light field. The maximum sampling speedes of 4-bit, 6-bit, 7-bit, 8-bit and 9-bit(ADC) are 1.695×1010 count/s, 4.33×109 count/s, 2.38×109 count/s, 1.24×109 count/s and 5.9×108 count/s, respectively. 展开更多
关键词 optical A/d conversion photonic sampling wavelength-division multiplexing Pockels effect
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Conversion of U-238 and Th-232 Using a Fusion Neutron Source
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作者 Xianjun Zheng Baiquan Deng +1 位作者 Wei Ou Fujun Gou 《World Journal of Nuclear Science and Technology》 2014年第4期222-227,共6页
This article proposes a general framework for the conversion of U-238 and Th-232 utilizing fusion-produced neutrons. This recognizes that emerging fusion technologies may not produce sufficient net energy output to ju... This article proposes a general framework for the conversion of U-238 and Th-232 utilizing fusion-produced neutrons. This recognizes that emerging fusion technologies may not produce sufficient net energy output to justify stand-alone applications, yet may be commercially viable for breeder transmutation or hybrid fusion-fission reactor concepts proposed herein to dispose of nuclear wastes and long life high radioactive fission products remaining in shutdown nuclear power plants. Results show that this could be achievable within a decade, given an appropriate fusion source. However, if 20% beryllium of nuclei density is added to the convertor blanket, the efficiency of the conversion process can be significantly increased. Also, the neutron energy spectrum resulting from dense D-D plasma core fusion is much softer than D-T fusion neutron source, hence the probability of (n, p) (n, α) backward decay reaction paths will be smaller and the conversion efficiency will be elevated. 展开更多
关键词 conversion BREEdER d-d FUSION
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应用Converse3D设计和实现虚拟校园 被引量:5
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作者 陶健林 王广军 +1 位作者 章健 苏本跃 《安庆师范学院学报(自然科学版)》 2013年第1期62-65,共4页
高等院校合理运用虚拟校园系统,不仅立体展示校园实景信息和校园文化,而且可以更有效地进行学校的组织管理,同时能够提高学校的知名度、增强学校的竞争力。本文以安庆职业技术学院校园为基础,建立三维实景模型,利用Converse3D虚拟漫游平... 高等院校合理运用虚拟校园系统,不仅立体展示校园实景信息和校园文化,而且可以更有效地进行学校的组织管理,同时能够提高学校的知名度、增强学校的竞争力。本文以安庆职业技术学院校园为基础,建立三维实景模型,利用Converse3D虚拟漫游平台,建立虚拟校园系统,实现实时交互式漫游。 展开更多
关键词 虚拟校园 漫游 三维实景模型 converse3d 实时交互式
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汽车制造业R&D投入产出效率及影响因素研究 被引量:1
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作者 贺银娟 《天津商务职业学院学报》 2023年第6期52-61,共10页
本文以知识生产函数模型和随机前沿生产函数模型作为理论模型,以中国汽车制造业R&D人员全时当量、R&D资本存量及其他行业R&D资本存量作投入,将中国汽车制造业新产品销售收入占主营业务收入比重作为创新产出,运用Frontier 4.... 本文以知识生产函数模型和随机前沿生产函数模型作为理论模型,以中国汽车制造业R&D人员全时当量、R&D资本存量及其他行业R&D资本存量作投入,将中国汽车制造业新产品销售收入占主营业务收入比重作为创新产出,运用Frontier 4.1软件,对中国汽车制造业2012-2020年R&D投入产出效率进行实证研究。同时也研究了经济发展水平、对外开放度、行业竞争程度及政府支持力度等因素对中国汽车制造业R&D投入产出效率的影响。结果显示:中国汽车制造业R&D人员全时当量、R&D资本存量及其它行业R&D资本存量对中国汽车制造业产出效率均有显著的正向影响,证实了知识生产模型构建的合理性;同时发现除去行业竞争程度未能对汽车制造业R&D产出效率产生正向影响作用外,经济发展水平、对外开放度及政府支持力度对中国汽车制造业R&D投入产出效率均具有一定程度的促进作用。 展开更多
关键词 汽车制造业 R&d 投入产出效率 随机前沿模型
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政府研发补贴对我国上市企业R&D产出的影响——基于调节中介效应实证研究
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作者 李双杰 尹倩雯 《北京联合大学学报(人文社会科学版)》 CSSCI 北大核心 2023年第3期80-89,共10页
党的二十大报告指出,要推动经济高质量发展,而高科技是经济高质量发展的引擎,尤其在创新全球化的时代背景下,企业研发和产能升级迫在眉睫。基于2016—2021年我国673家A股上市高技术企业的面板数据,以企业R&D支出为中介变量、企业规... 党的二十大报告指出,要推动经济高质量发展,而高科技是经济高质量发展的引擎,尤其在创新全球化的时代背景下,企业研发和产能升级迫在眉睫。基于2016—2021年我国673家A股上市高技术企业的面板数据,以企业R&D支出为中介变量、企业规模和企业吸收能力为调节变量,构建调节中介效应模型,探究政府研发补贴对企业R&D产出的影响机制。实证结果表明:(1)企业研发支出在政府研发补贴促进企业R&D产出过程起部分中介作用;(2)企业规模在上市企业R&D支出与产出间起正向调节作用,即研发支出对大企业R&D产出的提升效果优于小企业,且企业规模的调节作用存在行业异质性;(3)企业吸收能力在上市企业研发支出与产出间不存在显著调节作用。 展开更多
关键词 政府研发补贴 企业研发支出 企业R&d产出 GPCA 调节中介效应
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