2022 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS)最新文献

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A 104.76-TOPS/W, Spike-Based Convolutional Neural Network Accelerator with Reduced On-Chip Memory Data Flow and Operation Unit Skipping 一个104.76-TOPS/W,基于尖峰的卷积神经网络加速器,减少片上存储数据流和操作单元跳变
2022 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS) Pub Date : 2022-11-11 DOI: 10.1109/APCCAS55924.2022.10090309
P. Huang, Chen-Han Hsu, Yu-Hsiang Cheng, Zhaofang Li, Yu-Hsuan Lin, K. Tang
{"title":"A 104.76-TOPS/W, Spike-Based Convolutional Neural Network Accelerator with Reduced On-Chip Memory Data Flow and Operation Unit Skipping","authors":"P. Huang, Chen-Han Hsu, Yu-Hsiang Cheng, Zhaofang Li, Yu-Hsuan Lin, K. Tang","doi":"10.1109/APCCAS55924.2022.10090309","DOIUrl":"https://doi.org/10.1109/APCCAS55924.2022.10090309","url":null,"abstract":"The energy efficiency of artificial intelligence networks must be increased if they are to be implemented on edge devices. Brain-inspired spiking neural networks (SNNs) are considered potential candidates for this purpose because they do not involve multiplication operations. SNNs only perform addition and shifting operations. SNNs can be used with a convolutional neural network (CNN) to reduce the required computational power. The combination of an SNN and a CNN is called a spiking CNN (SCNN). To achieve a high operation speed with an SCNN, a large memory, which occupies a relatively large area and consumes a relatively large amount of power, is often required. In this paper, a data flow method is proposed to reduce the required on-chip memory and power consumption and to eliminate the operation unit skipping of a high-sparsity SCNN. This method decreases the overall on-chip memory required by an SCNN and increases the network's energy efficiency. When using the proposed method in this study, an SCNN exhibited energy efficiency of 104.76 TOPS/W when processing the CIFA-10 dataset.","PeriodicalId":243739,"journal":{"name":"2022 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS)","volume":"261 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123727929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A 12-bit 1 GS/s Current Steering DAC with the Appointed and Thermometer Coding Scheme 一个12位1gs /s电流转向DAC与指定和温度计编码方案
2022 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS) Pub Date : 2022-11-11 DOI: 10.1109/APCCAS55924.2022.10090369
Ko-Chi Kuo, Ying-Ju Sung
{"title":"A 12-bit 1 GS/s Current Steering DAC with the Appointed and Thermometer Coding Scheme","authors":"Ko-Chi Kuo, Ying-Ju Sung","doi":"10.1109/APCCAS55924.2022.10090369","DOIUrl":"https://doi.org/10.1109/APCCAS55924.2022.10090369","url":null,"abstract":"A novel appointed code for the decoder architecture of digital to analog converter is proposed by grouping and coding the current cell of the DAC's output to reduce further glitching of the current cell. In addition, the segmented current-steering DAC topology combines 6-MSB thermometers with 6 LSB of the appointed coding scheme. The proposed appointed code DAC's advantages exhibit a smaller area, lower power, and better static performance. On the other hand, better dynamic performance can achieve by implementing the thermometer code. The proposed 12-bit DAC utilizes the TSMC 90nm process with 1V/1.2V supply voltage and a sampling rate of 1.2 GS/s. The simulated DNL and INL are 0.12 LSB and 0.09 LSB, respectively. The proposed appointed code with thermometer code segmented DAC achieves higher output precision and less die area.","PeriodicalId":243739,"journal":{"name":"2022 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS)","volume":"340 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124781782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A 500-MS/s 9-Bit Time-Domain ADC Using a Nonbinary Successive Approximation TDC 采用非二进制连续逼近TDC的500 ms /s 9位时域ADC
2022 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS) Pub Date : 2022-11-11 DOI: 10.1109/APCCAS55924.2022.10090395
Yutong Zhao, Fan Ye, Junyan Ren
{"title":"A 500-MS/s 9-Bit Time-Domain ADC Using a Nonbinary Successive Approximation TDC","authors":"Yutong Zhao, Fan Ye, Junyan Ren","doi":"10.1109/APCCAS55924.2022.10090395","DOIUrl":"https://doi.org/10.1109/APCCAS55924.2022.10090395","url":null,"abstract":"This paper presents a 500-MS/s 9-bit time-domain analog-to-digital converter (ADC) using a nonbinary successive approximation time-to-digital converter (SA TDC) for energy efficiency and high linearity. By adding redundancy in the first six decision steps, the delay fluctuations of the delay cells and offset of the time-domain comparators in the SA TDC can be tolerated and nonlinearity can thus be reduced. In addition, a voltage-to-time converter (VTC) with a voltage-boost scheme is utilized to expand the linear dynamic range. Simulated in 28nm CMOS, the time-domain ADC consumes 4.27 mW under supply voltages of 0.9 V and 2.5 V. It is shown that SNDR and SFDR are 54.69 dB and 55.16 dB at Nyquist input frequency operating at a 500-MS/s sampling rate, respectively, resulting in a Walden figure of merit (FOMw) of 19.29 fJ/conversion step.","PeriodicalId":243739,"journal":{"name":"2022 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125044206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A 0.5 to 2GHz Blocker-Tolerant Receiver Achieving 29dBm OOB-IIP3 and 3.2 to 6dB NF Using Bottom-Plate Switched-Capacitor Technique 采用底板开关电容技术实现29dBm OOB-IIP3和3.2 ~ 6dB NF的0.5 ~ 2GHz容错接收机
2022 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS) Pub Date : 2022-11-11 DOI: 10.1109/APCCAS55924.2022.10090311
Yi Mao, Yuyang Du, Yongjun He, Gengzhen Qi, Pui-in Mak
{"title":"A 0.5 to 2GHz Blocker-Tolerant Receiver Achieving 29dBm OOB-IIP3 and 3.2 to 6dB NF Using Bottom-Plate Switched-Capacitor Technique","authors":"Yi Mao, Yuyang Du, Yongjun He, Gengzhen Qi, Pui-in Mak","doi":"10.1109/APCCAS55924.2022.10090311","DOIUrl":"https://doi.org/10.1109/APCCAS55924.2022.10090311","url":null,"abstract":"In this paper, a blocker-tolerant receiver (RX) is proposed covering 0.5 to 2GHz, which incorporates a gain-boosted (GB) mixer-first low-noise amplifier (LNA) network and a bottom-plate switched-capacitor (SC) N-path filter to enhance the out-of-band (OOB) blocker suppression and also improve the noise figure (NF). Furthermore, a clock-delay technique is proposed to improve the LO non-overlap characteristics. Implemented in 65nm CMOS technology, the simulated results present that under 80MHz offset frequency the RX achieves 29dBm OOB-IIP3 and −2.3dBm B −1dB. The noise figure (NF) is simulated ranging from 3.2 to 6dB, and the active area is 0.66mm2. At 2GHz, the power consumption is 25mW, in which only 4.7mW is due to the LO dynamic power.","PeriodicalId":243739,"journal":{"name":"2022 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128654245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Two-stage Training Framework for Hardware Constraints of Computing-in-Memory Architecture 内存计算体系结构硬件约束的两阶段训练框架
2022 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS) Pub Date : 2022-11-11 DOI: 10.1109/APCCAS55924.2022.10090308
Hao-Wen Kuo, Rui-Hsuan Wang, Zhaofang Li, Shih-Ting Lin, Meng-Fan Chang, K. Tang
{"title":"A Two-stage Training Framework for Hardware Constraints of Computing-in-Memory Architecture","authors":"Hao-Wen Kuo, Rui-Hsuan Wang, Zhaofang Li, Shih-Ting Lin, Meng-Fan Chang, K. Tang","doi":"10.1109/APCCAS55924.2022.10090308","DOIUrl":"https://doi.org/10.1109/APCCAS55924.2022.10090308","url":null,"abstract":"Analog computing-in-memory (CIM) involves high-density interleaved memory arrays beneficial to deep neural networks involving several parallel computations. Furthermore, it displays considerable potential in achieving high energy efficiency in artificial intelligence (AI) accelerators. This work presents a two-stage training framework that considers hardware architecture constraints and analyzes the nonidealities in CIM devices. (1) We designed a CIM convolution algorithm that can be commonly used in various neural networks. (2) In addition, the training framework can quantize weights and activations to their target bit widths and inject noise during the training process to improve the inference robustness of a neural network. In ResNet, our results in Fig. 7 revealed that our framework could improve 2.26% and 8.95% top-1 accuracy on CIFAR-10 and CIFAR-100 without injecting noise. (3) An MVM quantizer offers flexible quantization intervals to the output distribution of each layer for retaining crucial information and enhancing accuracy after the quantization process. The experimental results in Fig. 8 revealed that the accuracy of the ResNet and VGG models increased by 4.48% and 5.46% on CIFAR-10 with traditional linear quantization, respectively. The results of this study demonstrate that the proposed framework is practical and valuable for the fabrication and design of CIM chip systems.","PeriodicalId":243739,"journal":{"name":"2022 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS)","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127451794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Pipelined Computing-in-Memory Macro with Computation-Memory Aware Technique 基于计算-内存感知技术的内存中管道计算宏
2022 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS) Pub Date : 2022-11-11 DOI: 10.1109/APCCAS55924.2022.10090333
L. Chang, Pan Zhao, Jun Zhou
{"title":"Pipelined Computing-in-Memory Macro with Computation-Memory Aware Technique","authors":"L. Chang, Pan Zhao, Jun Zhou","doi":"10.1109/APCCAS55924.2022.10090333","DOIUrl":"https://doi.org/10.1109/APCCAS55924.2022.10090333","url":null,"abstract":"Computing-in-Memory (CIM) architecture is suitable for artificial intelligent accelerators, where frequent data movements are required between computation and memory units. CIM-based processing engine reduces redundant data interaction by integrated computation in/with memory and has become a promising candidate to alternate traditional multiply-and-accumulator (MAC). However, most of the previous CIM macros only considered computation without concern for the memory attribute, leading to a low memory computing ratio. This paper presents an SRAM-based digital CIM macro supporting pipeline mode and computation-memory aware technique to improve the ratio of memory-computation. We develop a novel weight driver with fine-grained ping-pong operation, avoiding the computation halt caused by weight updating. Based on our evaluation, the peak energy efficiency is 19.78TOPS/W at 22 nm technology node, 8-bit width, and 50% sparsity of input feature map.","PeriodicalId":243739,"journal":{"name":"2022 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130628147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A 0.3-μA Quiescent Current Output Capacitor-Less LDO with Dynamic Slew Rate Enhance Buffer 一种0.3 μA无静态电流输出电容的动态摆率增强缓冲LDO
2022 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS) Pub Date : 2022-11-11 DOI: 10.1109/APCCAS55924.2022.10090347
Tianxiang Wu, Yuting Zhang, Yanhan Zeng
{"title":"A 0.3-μA Quiescent Current Output Capacitor-Less LDO with Dynamic Slew Rate Enhance Buffer","authors":"Tianxiang Wu, Yuting Zhang, Yanhan Zeng","doi":"10.1109/APCCAS55924.2022.10090347","DOIUrl":"https://doi.org/10.1109/APCCAS55924.2022.10090347","url":null,"abstract":"This paper presents a low quiescent current, fast transient response output capacitor-less LDO implemented in a 180nm standard CMOS technology. A dynamic slew rate enhance buffer with transient spike detecting is proposed to improve the load transient response. Besides, a low power class-AB amplifier with gain enhance transistors is used to keep high loop gain for good regulated performance. According to the simulation result, the quiescent current of the LDO is only 283nA. Meanwhile, when the load current steps from 1 mA to 15 mA with a 300-ns edge time and a 0-pF output capacitor, the transient ripple is only 141.9 mV. Besides, the line regulation is only 0.305 mV/V and the load regulation is only 17.79 $mu mathbf{V/mA}$.","PeriodicalId":243739,"journal":{"name":"2022 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132875813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multi-type SRAM Test Structure with an Improved March LR Algorithm 基于改进March LR算法的多类型SRAM测试结构
2022 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS) Pub Date : 2022-11-11 DOI: 10.1109/APCCAS55924.2022.10090328
Xinshun Ning, Hong-yong Yang, Mengdi Zhang, Yanji Wang, Ye Zhao, Shushan Qiao
{"title":"Multi-type SRAM Test Structure with an Improved March LR Algorithm","authors":"Xinshun Ning, Hong-yong Yang, Mengdi Zhang, Yanji Wang, Ye Zhao, Shushan Qiao","doi":"10.1109/APCCAS55924.2022.10090328","DOIUrl":"https://doi.org/10.1109/APCCAS55924.2022.10090328","url":null,"abstract":"With the high-density integration of chips, the use of multi-type SRAM memory is becoming more and more extensive, which also brings great challenges for the testing of chips. Traditional MBIST is usually also achieved by using EDA tools, which makes it difficult to test multi-type memory directly. In this paper, a two-layer FSM PMBIST test structure is proposed, with the outer FSM controls to cut the effective address and data, which can realise the efficient testing of multi-type memory, and the inner FSM combines LFSR and integrates the improved March LR algorithm, which can achieve 100% coverage of the static dual-cell coupling faults. Finally, the simulation of the 55nm process verifies the normal function and good performance of the test structure.","PeriodicalId":243739,"journal":{"name":"2022 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125367245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Achieving < 1% Precision Clocking Solution with External-R under Practical Constraints 在实际约束下用外部r实现< 1%精度的时钟解决方案
2022 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS) Pub Date : 2022-11-11 DOI: 10.1109/APCCAS55924.2022.10090348
A. Roy, Preetham N. Reddy, N. Agarwal, Nikhil Das
{"title":"Achieving < 1% Precision Clocking Solution with External-R under Practical Constraints","authors":"A. Roy, Preetham N. Reddy, N. Agarwal, Nikhil Das","doi":"10.1109/APCCAS55924.2022.10090348","DOIUrl":"https://doi.org/10.1109/APCCAS55924.2022.10090348","url":null,"abstract":"An external resistor $(R_{EXT})$ based clocking solution with $< 1%$ precision is presented in this paper. Though $R_{EXT}$ can have much better temperature coefficient (TC), e.g. TCl $=25text{ppm}/^{circ}mathrm{C}$ and negligible TC2, practical considerations in an integrated system-on-chip (SoC), such as micro-controller (MCU) opposes the benefits. For low cost SoCs, it is desired that the EXTR-pin (i.e. the pin where $R_{EXT}$ is mounted) shares a general purpose I/O pin (GPIO). Under this constraint, adjacent GPIO switching can cause significant coupling onto EXTR-pin resulting in intolerable jitter. Additionally, the shared, tri-stated GPIO adds leakage current with nonlinear temperature profile, into $R_{EXT}$ causing curvature error in frequency. These are solved by novel circuit solutions which finally help achieve the targeted precision. Measured and simulated results are provided to support the claims.","PeriodicalId":243739,"journal":{"name":"2022 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125367432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A 500-MHz 32-bit DETFF-based Shift Register Utilizing 40-nm CMOS Technology 基于40纳米CMOS技术的500 mhz 32位移位寄存器
2022 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS) Pub Date : 2022-11-11 DOI: 10.1109/APCCAS55924.2022.10090380
Jyoshnavi Akiri, L. K. Tolentino, L. Yang, B. Esakki, S. Sampath, Chua-Chin Wang
{"title":"A 500-MHz 32-bit DETFF-based Shift Register Utilizing 40-nm CMOS Technology","authors":"Jyoshnavi Akiri, L. K. Tolentino, L. Yang, B. Esakki, S. Sampath, Chua-Chin Wang","doi":"10.1109/APCCAS55924.2022.10090380","DOIUrl":"https://doi.org/10.1109/APCCAS55924.2022.10090380","url":null,"abstract":"A double-edge triggered flip-flop (DETFF) has the distinct ability to latch data at either the rising or the falling edge of the edge unlike the single-edge triggered flip-flop (SETFF). The proposed DETFF uses parallel dual paths that work without the need of keepers for input signal boost and an inverting clock for the opposite phase operation. A Schmitt trigger replaced the conventional feedback inverter with keeper in the DETFF, since the feedback inverter may lead to metastability which can affect the output at unexpected timing. The said DETFF was implemented in a 32-bit shift register using TSMC 40-nm CMOS for functionality testing. At a load capacitance of 60 pF, 31.71% power consumption decrease and 43.57% Tc-q delay reduction were exhibited by the proposed shift register as shown by the post-layout simulation results. It has the best normalized energy per bit normalized power, and normalized delay per bit among prior works.","PeriodicalId":243739,"journal":{"name":"2022 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126847188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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