发布求助
文献互助 智能选刊 最新文献

Elektrika最新文献

筛选
英文 中文
Pemanfaatan Energi Surya Sebagai Energi Alternatif Aerator Untuk Meningkatkan Kualitas Air Kolam Ikan Hias Berukuran Kecil 利用太阳能作为曝气器的替代能源，改善小型绿色鱼类地下水的质量
Elektrika Pub Date : 2022-10-22 DOI: 10.26623/elektrika.v14i2.5752
Z. Arifin, Bagus Argo Saroso, Agung Kurniawan, Farhan Dio Ageftry
{"title":"Pemanfaatan Energi Surya Sebagai Energi Alternatif Aerator Untuk Meningkatkan Kualitas Air Kolam Ikan Hias Berukuran Kecil","authors":"Z. Arifin, Bagus Argo Saroso, Agung Kurniawan, Farhan Dio Ageftry","doi":"10.26623/elektrika.v14i2.5752","DOIUrl":"https://doi.org/10.26623/elektrika.v14i2.5752","url":null,"abstract":"<p><em>Aerator has function to supply the dissolved oxygen in the water is very important for the survival of fish, therefore the</em><br /><em>aerator is required to be on for 24 hours. However, due to depending on PLN electricity, when there is a power outage for a</em><br /><em>long period of time, the aerator can't supply dissolved oxygen into the pond and the oxygen supply in the pond will drop</em><br /><em>drastically. This is dangerous because it can threaten the survival of ornamental fish. Therefore, an energy supply system is</em><br /><em>needed that can supply electrical energy to the aerator to replace the dependency electricity from PLN. This tool is designed</em><br /><em>to use a power supply from solar panels so that it is not affected in the event of a PLN power outage, and can always supply</em><br /><em>dissolved oxygen levels for the survival of ornamental fish. In addition, this tool is also equipped with a monitoring system</em><br /><em>based on the Nodemcu ESP8266 Microcontroller which is displayed via the Thingspeak server. The monitoring system used</em><br /><em>in this tool uses a PH sensor and a temperature sensor. The use of PH sensors and temperature sensors because the level of</em><br /><em>acidity (PH) and temperature are one of the parameters of water quality other than dissolved oxygen. When the aerator is on,</em><br /><em>the information on the pool water will be read through the PH sensor and temperature sensor.</em></p>","PeriodicalId":31998,"journal":{"name":"Elektrika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44116389","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
Perancangan Alat Monitoring Arus Bocor pada Kabel 20 kV Menggunakan Filter Kalman Berbasis Internet of Things 基于物联网冷过滤器的20kV电缆Bocor流量监测工具设计
Elektrika Pub Date : 2022-10-22 DOI: 10.26623/elektrika.v14i2.4849
Adi Franata H Sitanggang, Yuliyanto Agung Prabowo
{"title":"Perancangan Alat Monitoring Arus Bocor pada Kabel 20 kV Menggunakan Filter Kalman Berbasis Internet of Things","authors":"Adi Franata H Sitanggang, Yuliyanto Agung Prabowo","doi":"10.26623/elektrika.v14i2.4849","DOIUrl":"https://doi.org/10.26623/elektrika.v14i2.4849","url":null,"abstract":"One of the problems that often occurs in the use of ground cables is insulation failure. This condition can cause leakage current in the 20 kV cable on the secondary side of the transformer. The greater the value of the leakage current, the more heat will cause the insulation to worsen. If this condition is not handled immediately, it can lead to the opportunity for a short-circuit current between the phase and ground. Therefore, an Internet of Thing-based monitoring tool is needed that can determine the amount of leakage current contained in the 20 kV cable on the secondary side of the transformer by applying the Kalman filter method and sending it to the substation operator using Wifi. Based on the test, it was found that the implementation of this monitoring tool obtained more constant measurement results than the actual measurement value using a measuring instrument with an average error per phase, 1.5594% phase R, 1.5535% phase S, 1.5548% phase T.","PeriodicalId":31998,"journal":{"name":"Elektrika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43252557","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
Pengembangan Bag Valve Mask (BVM) Otomatis 袋装口罩(BVM)自动开发
Elektrika Pub Date : 2022-04-30 DOI: 10.26623/elektrika.v14i1.4988
Mohamad Rofi’i, Mohamad Sofie, Patrisius Kusi Olla
{"title":"Pengembangan Bag Valve Mask (BVM) Otomatis","authors":"Mohamad Rofi’i, Mohamad Sofie, Patrisius Kusi Olla","doi":"10.26623/elektrika.v14i1.4988","DOIUrl":"https://doi.org/10.26623/elektrika.v14i1.4988","url":null,"abstract":"Ventilators are one of the medical devices that are needed as a breathing apparatus for COVID-19 patients who have respiratory problems. One of the low-cost ventilators currently being developed by several domestic institutions is the ambu bag-based ventilator. The point is an air bag (bag) that is pressed by two carefully controlled automatic clamps, so that it can reach all, while taking into account portability, aesthetics and ease of manufacture. Therefore, the Bag Valve Mask (BVM) or ambu bag is an emergency option to replace the function of the ventilator. This study aims to make an ambu bag that can be applied as a portable mechanical ventilator. Thus, the ambu bag which was originally used manually can be used automatically like a ventilator machine in general. In determining the type of mechanical arm pressure, several parameters such as minute volume, respiratory rate, and tidal volume are used. As recommended by the American Heart Association (AHA) that the tolerance limit for the RR value is +/-10 BPM, it can be said that the automatic BVM as a result of this study can be used with or without a reservoir as needed or with the addition of oxygen","PeriodicalId":31998,"journal":{"name":"Elektrika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45357432","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
Analisis Elektrik Motor Penggerak TBS (Traveling Band Screen) PLTU TBS（旅行带筛）电动发动机分析PLTU
Elektrika Pub Date : 2022-04-30 DOI: 10.26623/elektrika.v14i1.5040
Puri Muliandhi, Isya’ Aryan Sulistyo
{"title":"Analisis Elektrik Motor Penggerak TBS (Traveling Band Screen) PLTU","authors":"Puri Muliandhi, Isya’ Aryan Sulistyo","doi":"10.26623/elektrika.v14i1.5040","DOIUrl":"https://doi.org/10.26623/elektrika.v14i1.5040","url":null,"abstract":"The Traveling Band Screen (TBS) is a means of filtering trash and sea creatures such as jellyfish in the PLTU Intake area. FFB filters waste by rotating the screen, then the waste is sprayed using backwash water so that the filtered waste can fall into the disposal route. The amount of impurity material stuck on the screen has an impact on the decrease in flow capacity, thus affecting the increase in the load of the TBS motor and causing the TBS to become overloaded so that the PLTU will Shut Down, so an analysis is needed to determine the electric ability of the motor drive of the TBS system to block the screen. One of the analyzes carried out is observing the optimal load of the motor with power: 2/1 HP, Rotation: 1500 rpm with reduction ratio: 1500: 1 to determine the load blockage by using the SEW Eurodrive motor manufacturer. From the results of the load analysis, the existing motor specifications are only able to operate for a screen clogging percentage of less than 13.6%.","PeriodicalId":31998,"journal":{"name":"Elektrika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46672923","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
Analisa Perencanaan Pembangkit Listrik Tenaga Surya Atap dengan Sistem Hybrid di PT. Koloni Timur 屋顶太阳能发电厂与东部殖民地的混合系统进行规划分析
Elektrika Pub Date : 2022-04-30 DOI: 10.26623/elektrika.v14i1.3784
Noor Hajir Sudarjo, M. Haddin, Agus Suprajitno
{"title":"Analisa Perencanaan Pembangkit Listrik Tenaga Surya Atap dengan Sistem Hybrid di PT. Koloni Timur","authors":"Noor Hajir Sudarjo, M. Haddin, Agus Suprajitno","doi":"10.26623/elektrika.v14i1.3784","DOIUrl":"https://doi.org/10.26623/elektrika.v14i1.3784","url":null,"abstract":"This study discusses the Planning of a Rooftop Solar Power Plant with a Hybrid System at PT East Colony Kudus. Themodel is set as a PLTS whose solar panels are adjusted to the roof area of the building. This PLTS is functioned as a newrenewable energy resource (EBT) in the form of a hybrid between PLTS and PLN's electrical energy source, this is done tohelp supply electricity. Parameters determined include: roof area, solar panel capacity, inverter capacity, battery capacityand payback period. The results show that PLTS with a total of 80 solar panels installed with a capacity of each panel 405Watt peak, then obtained a power capacity of 32.4 kilo Watt peak which is divided into 5 arrays, with a solar charger controllerand inverter using a 10kW capacity of 5 units, 80 batteries with a capacity of 400Ah. So that PLTS is able to contribute 39.3%of the total power needed by PT East Colony (electric power from PLN is 60.7%). This hybrid payback period will return after8 years and 7 months.","PeriodicalId":31998,"journal":{"name":"Elektrika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43586829","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: 2
Koordinasi Proteksi Relai Arus Lebih pada Sistem Distribusi Radial Menggunakan Jaringan Syaraf Tiruan Perambatan Balik 使用逆向浏览器模拟的神经网络进行径向配送
Elektrika Pub Date : 2022-04-30 DOI: 10.26623/elektrika.v14i1.4474
Andy Frediansyah, M. Facta, S. Handoko
{"title":"Koordinasi Proteksi Relai Arus Lebih pada Sistem Distribusi Radial Menggunakan Jaringan Syaraf Tiruan Perambatan Balik","authors":"Andy Frediansyah, M. Facta, S. Handoko","doi":"10.26623/elektrika.v14i1.4474","DOIUrl":"https://doi.org/10.26623/elektrika.v14i1.4474","url":null,"abstract":"To reduce damage to electrical power equipment, protective equipment is needed that is designed as well as possible, so that the protection relay can isolate faults in parts of the distribution network as fast as possible. This backup protection need appropriate relay coordination, so that could protect, if it happens of a primary protection failure. To provide the best service to customers, it is necessary to coordinate the protection relay in the electric power system. To provide protection, the protection relay in the electric power system must be properly coordinated. In this study, we will make a simulation to calculate the TDS and Ipickup values of the overcurrent relay using a artificial neural network backpropagation with software Matlab R2016a. The results of this study can determine the value of TDS (Time Dial Setting) and Ipickup (Current pickup) by overcome the main problem of overcurrent relay protection coordination at the Ammurea II Factory PT. Petrokimia Gresik using a method artificial neural network backpropagation. And, also obtained the results of the minimum value of MSE (Mean Square Error) with the process using the method artificial neural network backpropagation.","PeriodicalId":31998,"journal":{"name":"Elektrika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43857469","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
Ensiklopedia Digital Varietas Ubi Jalar Berdasarkan Klasifikasi Citra Daun Menggunakan KNearest Neighbor 基于KNearest近邻的数字百科全书字符串Ubi变体
Elektrika Pub Date : 2022-04-30 DOI: 10.26623/elektrika.v14i1.4329
Bahtiar Adi Prasetya, Zilvanhisna Emka Fitri, Abd. Madjid, Arizal Mujibtamala Nanda Imron
{"title":"Ensiklopedia Digital Varietas Ubi Jalar Berdasarkan Klasifikasi Citra Daun Menggunakan KNearest Neighbor","authors":"Bahtiar Adi Prasetya, Zilvanhisna Emka Fitri, Abd. Madjid, Arizal Mujibtamala Nanda Imron","doi":"10.26623/elektrika.v14i1.4329","DOIUrl":"https://doi.org/10.26623/elektrika.v14i1.4329","url":null,"abstract":"Sweet potato is a source of carbohydrates which is an alternative food in order to accelerate food diversification. This is due to the high productivity of sweet potato so it is very profitable to cultivate. Sweet potato has many varieties, one of the differences is observed based on leaf shape which has four kinds of leaf shape, namely cordate, lobed, triangular and almost divided. The problem that often occurs is that many varieties have similarities, causing difficulties in distinguishing sweet potato varieties, especially for novice farmers. To overcome this problem, the researchers created a digital encyclopedia of sweet potato varieties based on leaf shape using computer vision. The parameters used are area, perimeter, metric, length, diameter, ASM, IDM, entropy, contrast and correlation at angles of 0°, 45°, 90° and 135°. The amount of data used is 256 training data and 40 testing data. The K-Nearest Neighbor method is able to classify sweet potato leaf images for digital encyclopedias with an accuracy of 95% with variations in the values of K = 23 and K = 25.","PeriodicalId":31998,"journal":{"name":"Elektrika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43863472","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
Perancangan Portable Continuous Passive Motion (CPM) sebagai Alat Bantu Rehabilitasi Fraktur Lutut Pasca Operasi Berbasis Internet of Things (IoT) 便携式连续被动运动（CPM）设计作为帮助修复复活节物联网（IoT）断裂端的工具
Elektrika Pub Date : 2022-04-30 DOI: 10.26623/elektrika.v14i1.4078
Warsat Resti Arbi Nugroho, S. Hidayah, Rizki Nugraheni Budi Widodo, Adila Eka Saputri, Fatkurohman Nanda Prambudi, Ifnu Agus Riyanto, I. A. W. Kusuma
{"title":"Perancangan Portable Continuous Passive Motion (CPM) sebagai Alat Bantu Rehabilitasi Fraktur Lutut Pasca Operasi Berbasis Internet of Things (IoT)","authors":"Warsat Resti Arbi Nugroho, S. Hidayah, Rizki Nugraheni Budi Widodo, Adila Eka Saputri, Fatkurohman Nanda Prambudi, Ifnu Agus Riyanto, I. A. W. Kusuma","doi":"10.26623/elektrika.v14i1.4078","DOIUrl":"https://doi.org/10.26623/elektrika.v14i1.4078","url":null,"abstract":"One of the steps needed in patients with fractures of the knee joint is therapeutic exercises guided by physiotherapists. Therapeutic exercise is a physiotherapy modality by moving the joints both actively and passively. Inspired by this, the Portable Continuous Passive Motion (CPM) tool was created which is a physiotherapy aid for patients after surgery or knee surgery. Portable Continuous Passive Motion (CPM) has been developed based on IoT. Portable Continuous Passive Motion (CPM) uses Arduino LoRa as a micro controller, a stepper motor as a driver and uses a software application as a controller. The form of this research is research and development. From the results of the development, it can be concluded that Portable Continuous Passive Motion (CPM) can be useful for postoperative fracture patients as a practical and flexible postoperative manual therapy tool.","PeriodicalId":31998,"journal":{"name":"Elektrika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49556875","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
Studi Pelepasan Beban Pada PLTU Keramasan Saat Terjadi Penurunan Frekuensi 在下降频率下降时，对普利语区通量释放进行了研究
Elektrika Pub Date : 2021-11-04 DOI: 10.26623/elektrika.v13i2.3707
Melingga Lingga, A. Azis, Irine Kartika Pebrianti
{"title":"Studi Pelepasan Beban Pada PLTU Keramasan Saat Terjadi Penurunan Frekuensi","authors":"Melingga Lingga, A. Azis, Irine Kartika Pebrianti","doi":"10.26623/elektrika.v13i2.3707","DOIUrl":"https://doi.org/10.26623/elektrika.v13i2.3707","url":null,"abstract":"The demand for electric power increases along with the development of technological progress and development. The use of electricity is an important factor in people's lives, both in households, lighting, communication, and industrial. The purpose of this research is to calculate the frequency response before load shedding, to calculate the frequency response after load shedding and to analyze the load recovery after normal frequency in the load. The methods to be used in writing and discussing this research are: Observation Method, Interview Method / Interview, Literature Study Method. Based on the calculation of the data in the previous chapter, the following conclusions can be drawn, the calculation of the conditions before carrying out the load shedding is based on the rate of decreasing frequency from the result obtained is 1.6 Hz / s, then to calculate the time used in determining the frequency at the time of load shedding then the results obtained are 54 Hz, Meanwhile, to calculate the frequency after load shedding that is obtained is 49.1 Hz, Calculation of load shedding time is expected when there is a decrease in frequency of 10.5 seconds, Calculation of the load rate of increase expected after load shedding then the optimal load value that must be removed is 5.55 w. ","PeriodicalId":31998,"journal":{"name":"Elektrika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48606642","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
Analisis Data Berat Badan Dan Panjang Bayi Dengan Alat Ukur Panjang Dan Berat Badan Bayi Berbasi Arduino 使用Arduino Free婴儿体重和长尺寸工具分析体重和长婴儿数据
Elektrika Pub Date : 2021-11-04 DOI: 10.26623/elektrika.v13i2.3161
Bayu Wahyudi, Deny Julian Adella, Muhammad Ulin Nuha ABA
{"title":"Analisis Data Berat Badan Dan Panjang Bayi Dengan Alat Ukur Panjang Dan Berat Badan Bayi Berbasi Arduino","authors":"Bayu Wahyudi, Deny Julian Adella, Muhammad Ulin Nuha ABA","doi":"10.26623/elektrika.v13i2.3161","DOIUrl":"https://doi.org/10.26623/elektrika.v13i2.3161","url":null,"abstract":"Monitoring the nutritional status of infants at this time is mostly still using the manual method, by looking at anthropomeric standard books so that nutritional monitoring takes longer and is less practical. Babies need nutritional status based on age, weight, length of the baby (baby's height), and sex of the baby. To find out the nutritional condition of the baby, the author wants to develop a measurement tool for weight and length of the baby with the output data in Microsoft Excel. This study aims to design a baby's weight and length measurement tools with data output at Microsoft Excel and perform a function test. The process of detection in infants using ultrasonic sensors that serves to determine the height or length of the baby's body and load cell sensors to determine the baby's weight, then the LCD (Liquid Crystal Display) which displays the results of ultrasonic sensors and load cell sensors and Arduino Uno. The results of this study are an infant weight and height measurement tool with an arduino uno-based anthropometric index method with 2 ultrasonic sensors as height and length counters, and 1 load cell sensor as a weight calculator for infants that will later be displayed on the LCD screen.","PeriodicalId":31998,"journal":{"name":"Elektrika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44333547","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: 2
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信