发布求助
文献互助 智能选刊 最新文献

Karaelmas Science and Engineering Journal最新文献

筛选
英文 中文
Emerging and Vanishing Association Pattern Mining in Hydroclimatic Datasets 水文气候数据集的新兴和消失关联模式挖掘
Karaelmas Science and Engineering Journal Pub Date : 2018-06-26 DOI: 10.7212/ZKUFBD.V8I1.692
Mete Celik, A. Ş. Dokuz, Filiz Dadaser‐Celik
{"title":"Emerging and Vanishing Association Pattern Mining in Hydroclimatic Datasets","authors":"Mete Celik, A. Ş. Dokuz, Filiz Dadaser‐Celik","doi":"10.7212/ZKUFBD.V8I1.692","DOIUrl":"https://doi.org/10.7212/ZKUFBD.V8I1.692","url":null,"abstract":"Emerging and vanishing association patterns can be defined as association patterns whose frequencies (supports) get stronger and weaker over time, respectively. Discovering these patterns is important for several application domains such as financial and communication services, public health, and hydroclimatic studies. Classical association pattern mining algorithms do not consider how the strengths of association patterns change over time. An association pattern can be defined as an emerging or vanishing pattern when its support measure changes over time. In this paper, we focus on discovery of time evolving association patterns (i.e., emerging and vanishing association patterns) from datasets. To discover such patterns, a novel algorithm, named as Emerging and Vanishing Association Pattern Miner (EVAPMiner) algorithm, was proposed. The proposed algorithm was evaluated using hydroclimatic dataset of Turkey. The analyses showed that the proposed algorithm successfully detects emerging and vanishing association patterns in hydroclimatic datasets.","PeriodicalId":17742,"journal":{"name":"Karaelmas Science and Engineering Journal","volume":"6 Suppl 1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84981614","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
Toplu Taşımada Çok Amaçlı Karar Verme Ve Metropolitan Bir Alanda Ev-İş Ulaşım Hizmeti Modellemesi
Karaelmas Science and Engineering Journal Pub Date : 2018-06-26 DOI: 10.7212/zkufbd.v8i1.839
M. Altan, Mehmet Çağrı Kiziltaş, Süleyman Cem Divrik
{"title":"Toplu Taşımada Çok Amaçlı Karar Verme Ve Metropolitan Bir Alanda Ev-İş Ulaşım Hizmeti Modellemesi","authors":"M. Altan, Mehmet Çağrı Kiziltaş, Süleyman Cem Divrik","doi":"10.7212/zkufbd.v8i1.839","DOIUrl":"https://doi.org/10.7212/zkufbd.v8i1.839","url":null,"abstract":"Bu calismada; bir metropolitan alandaki ev-is otobus hizmetlerinin tasarimi icin bir model ve algoritma ortaya konmaya calisilmistir. Bu tarz hizmetler; verimlilik, etkinlik ve esitlik gibi celisen kriterler arasinda bir dengeyi saglamak durumundadir. Bu maksatla, diger butun asamalari da kapsayacak sekilde cok amacli bir model gelistirilmeye calisilmis olup esitlik kriteri, otobusun duraga varis zamaninin zaman cizelgeleriyle gosterilmesiyle dikkate alinmaya calisilmistir. Zaman cizelgeleri; ornegin bu hizmetin diger ulastirma modlariyla uyumunun garanti edilmesi gibi diger kullanimlari da ihtiva etmektedir. Bu; onerilen modelin kilavuz ilkelerinden birisi olup bir kere de bircok konunun es zamanli isleme alinmasi konseptine dayanmaktadir. Hat boyunca hem otobus durak yerlesimleri ve hem de kisitlamalarla karsilasildiginda gecislerin olabilecegi kentsel yol aglarinda bir guzergahlandirmayi iceren bir rotalar kumesi yaklasimi modele tanimlanmistir. Sonuc olarak; cok amacli guzergah yerlesim modeli bir tabu arastirma algoritmasiyla cozulmustur. Roma-Italya’ daki buyuk bir arastirma merkezi icin bir uygulama olarak ev-is otobus servisi analiz edilmistir. Bu mevcut durum calismasi bir algoritma sonuclari icin kistas ortaya koymakta ve onerilen metodolojiye uygulanabilirlik gostermektedir.","PeriodicalId":17742,"journal":{"name":"Karaelmas Science and Engineering Journal","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87894871","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: 7
Superposition operator on some 2-normed sequence spaces 一类2赋范序列空间上的叠加算子
Karaelmas Science and Engineering Journal Pub Date : 2018-06-26 DOI: 10.7212/ZKUFBD.V8I1.1055
Oğuz Oğur
{"title":"Superposition operator on some 2-normed sequence spaces","authors":"Oğuz Oğur","doi":"10.7212/ZKUFBD.V8I1.1055","DOIUrl":"https://doi.org/10.7212/ZKUFBD.V8I1.1055","url":null,"abstract":"In this paper, we study on some characterization of superposition operators defined on 2-normed sequence spaces.","PeriodicalId":17742,"journal":{"name":"Karaelmas Science and Engineering Journal","volume":"125 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75702494","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: 1
Preparation Of A Chiral Cu(II)-Schiff Base Complex And Application For Asymmetric Catalysis 手性Cu(II)-Schiff碱配合物的制备及其在不对称催化中的应用
Karaelmas Science and Engineering Journal Pub Date : 2018-06-26 DOI: 10.7212/ZKUFBD.V8I1.921
Leman Alkan
{"title":"Preparation Of A Chiral Cu(II)-Schiff Base Complex And Application For Asymmetric Catalysis","authors":"Leman Alkan","doi":"10.7212/ZKUFBD.V8I1.921","DOIUrl":"https://doi.org/10.7212/ZKUFBD.V8I1.921","url":null,"abstract":"A chiral copper(II)-Schiff base complex was synthesized from L-Phenylalanine for the enantioselective Henry reaction. A variety of chiral β-nitroalcohols were obtained in good yield (up to 76%) with high enantioselectivities (up to 90% ee) under the optimized reaction conditions.","PeriodicalId":17742,"journal":{"name":"Karaelmas Science and Engineering Journal","volume":"57 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75731597","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
VHDL-AMS-based modeling of an asymmetric H-type half-bridge converter for mutually coupled SRM 基于vhdl - ams的互耦合SRM非对称h型半桥变换器建模
Karaelmas Science and Engineering Journal Pub Date : 2018-06-26 DOI: 10.7212/ZKUFBD.V8I1.1061
C. Şahin, A. E. Amac, M. Karaçor
{"title":"VHDL-AMS-based modeling of an asymmetric H-type half-bridge converter for mutually coupled SRM","authors":"C. Şahin, A. E. Amac, M. Karaçor","doi":"10.7212/ZKUFBD.V8I1.1061","DOIUrl":"https://doi.org/10.7212/ZKUFBD.V8I1.1061","url":null,"abstract":"Nowadays, mutually coupled reluctance machine (MCSRM), which produces further torque compare to classical switched reluctance machine (SRM), has acquired a deserving value and importance thanks to developing technology and control algorithm. While torque is produced through the changing of self-inductance at classical SRM, it depends on mutual inductance that occurs between phases at MCSRM. Determination of the inductance and transferring of it to the converter model correctly are quiet important, since the machine torque has directly varied by inductance value. There are various methods on SRM drives modeling such as look-up table, manipulated by the variation of inductance value in the literature. However, exact modeling can be possible with transferring of the inductance values acquired from the machine static analysis to the model smoothly. In order to achieve that, it is proposed a “Very high-speed integrated circuit Hardware Description Language-Analog Mixed Signal” (VHDL-AMS) based modeling method for an asymmetric H-type half-bridge converter as a MCSRM drive in this study. Mutual inductance values are calculated by VHDL-AMS, according to phase current and angle of the machine rotor. Consequently, inductance that varies depending upon the machine rotor position is determined by the proposed method dynamically.","PeriodicalId":17742,"journal":{"name":"Karaelmas Science and Engineering Journal","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75548971","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
Chemotype Variation and Antimicrobial Properties of Achillea millefolium L. subsp. millefolium var. millefolium 千叶扁桃的化学型变异及抗菌特性。千叶，千叶
Karaelmas Science and Engineering Journal Pub Date : 2018-06-26 DOI: 10.7212/ZKUFBD.V8I1.682
I. Gecibesler
{"title":"Chemotype Variation and Antimicrobial Properties of Achillea millefolium L. subsp. millefolium var. millefolium","authors":"I. Gecibesler","doi":"10.7212/ZKUFBD.V8I1.682","DOIUrl":"https://doi.org/10.7212/ZKUFBD.V8I1.682","url":null,"abstract":"Achillea millefolium L. subsp. millefolium var. millefolium were collected from six different localities, growing in wild natural habitat in the Eastern Anatolian province of Bingol in Turkey. Essential oil of the samples was isolated by using an apparatus with Clevenger-type and was analyzed by GC-MS/FID spectroscopy. In total 56 components were identified from six samples collected from different localities and important qualitative and quantitative differences were observed. The most abundant components from all samples were found as α-pinene, β-pinene, sabinene, 1,8-cineol, endo-bornyl acetate and α-terpineol. The antimicrobial activities of six different samples essential oil components were tested against bacteria and yeast strains. According to the antimicrobial test results, the most susceptible microorganisms were identified as C. albicans, S. aureus and S. enterica against the essential oils derived from sample collected from Sancak and it suggested that this essential oil may be a valuable candidate for drug formulation.","PeriodicalId":17742,"journal":{"name":"Karaelmas Science and Engineering Journal","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91284957","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
An investigation of the chemical strength of directionally solidified MgAl2O4-Y3Al5O12 eutectic ceramic materials at gas turbine conditions MgAl2O4-Y3Al5O12共晶陶瓷材料在燃气轮机条件下定向凝固的化学强度研究
Karaelmas Science and Engineering Journal Pub Date : 2018-06-26 DOI: 10.7212/zkufbd.v8i1.1012
S. Abalı
{"title":"An investigation of the chemical strength of directionally solidified MgAl2O4-Y3Al5O12 eutectic ceramic materials at gas turbine conditions","authors":"S. Abalı","doi":"10.7212/zkufbd.v8i1.1012","DOIUrl":"https://doi.org/10.7212/zkufbd.v8i1.1012","url":null,"abstract":"Nickel based alloys are mostly use in aircraft components such as nozzle, blade and heat shield in gas turbine engines. But the resisting temperatures of these alloys are limiting their applications, and cause environmental pollution with increasing energy costs. However directionally solidified eutectic oxide ceramics grown following melting, may eliminate these problems. In this study, the comparison of the production and hot corrosion resistance of eutectic structure MgAl2O4-Y3Al5O12 (MAS-YAG) produced by the directional solidification method and sintering magnesium aluminate spinel (MAS)-yttrium aluminium garnet (YAG) composite were compared for the same chemical composition. For this reason, volume, weight and microstructure (SEM) changes of the sinter and eutectic materials were observed. The flexural strength behaviour of sintered and eutectic MAS-YAG materials were investigated at room temperature and corrosive gas turbine condition at 1600°C. Corrosion results of directionally solidified MAS-YAG structure were better than conventional sinter ceramics for the same composition.","PeriodicalId":17742,"journal":{"name":"Karaelmas Science and Engineering Journal","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81851207","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
Termoset Matrisli Cam Elyaf Takviyeli Polimer (CTP) Atıkların Mekanik Geri Dönüşüm Ürünlerinin Sıcak Pres Kalıplama Bileşiminde (BMC) Tekrar Değerlendirilmesi
Karaelmas Science and Engineering Journal Pub Date : 2018-06-26 DOI: 10.7212/ZKUFBD.V8I1.936
Fatih Balikoğlu, T. K. Demircioğlu, Akın Ataş, Seda Beyaz, N. Arslan
{"title":"Termoset Matrisli Cam Elyaf Takviyeli Polimer (CTP) Atıkların Mekanik Geri Dönüşüm Ürünlerinin Sıcak Pres Kalıplama Bileşiminde (BMC) Tekrar Değerlendirilmesi","authors":"Fatih Balikoğlu, T. K. Demircioğlu, Akın Ataş, Seda Beyaz, N. Arslan","doi":"10.7212/ZKUFBD.V8I1.936","DOIUrl":"https://doi.org/10.7212/ZKUFBD.V8I1.936","url":null,"abstract":"Bu calismada, termoset esasli cam elyaf takviyeli polimer (CTP) plakalarin mekanik geri kazanimi islemi ve tekrar kullanimi arastirilmistir. Geri donusum urunleri kutlesel olarak % 4, 8, 12, 16 oranlarinda sicak pres kaliplama bilesiminde (BMC) orijinal fiberlerin yerine kullanilmistir. Geri donusum cam fiber iceren numunelerin cekme test sonuclarindaki dusme miktari, orijinal numuneler ile karsilastirildiginda %5’in altinda kalmistir. %4 geri donusum iceren numunenin en dusuk egilme dayanimina sahip oldugu gozlenmistir. Kutlece % 8, 12, 16 geri donusum takviyeli numunelerin egilme test sonuclari ise, %100 orijinal cam fiber iceren numuneler ile kiyaslandiginda egilme ozelliklerinde dusme miktarlari %10 civarinda belirlenmistir. %4 geri donusum iceren numune disinda tum numuneler kabul edilebilir mekanik performans gostermistir.","PeriodicalId":17742,"journal":{"name":"Karaelmas Science and Engineering Journal","volume":"90 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84371714","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
Hayvansal atıklardan biyogaz üretimi için küçük ölçekli reaktör modeli geliştirilmesi
Karaelmas Science and Engineering Journal Pub Date : 2018-06-26 DOI: 10.7212/ZKUFBD.V8I1.910
Omer Hulusi Dede, Gülgün Dede, Cemile Dede, Saim Ozdemir
{"title":"Hayvansal atıklardan biyogaz üretimi için küçük ölçekli reaktör modeli geliştirilmesi","authors":"Omer Hulusi Dede, Gülgün Dede, Cemile Dede, Saim Ozdemir","doi":"10.7212/ZKUFBD.V8I1.910","DOIUrl":"https://doi.org/10.7212/ZKUFBD.V8I1.910","url":null,"abstract":"Bu calismada, buyuk bas hayvan gubresinden biyogaz uretimine uygun, aile tipi, gercek olcekli bir biyogaz reaktoru tasarlanmis ve biyogaz uretimi yapilmistir. Reaktorun tasarlanmasi ve insasinda temel kriter olarak, kirsal kosullara uygunlugu, maliyet avantaji, kolay isletilebilir olmasi baz alinmistir. Reaktorun tasiyici elamanlari betonarme, duvarlari ise gaz beton olarak insa edilmistir. Isi kaybini onlemek icin dis cepheleri membran ve cam elyafi ile sarilmistir. Uretilen biyogazi depolamak, sabit basinc saglamak ve gaz sikismasi emniyeti amaci ile bir su kapani icinde yuzen hareketli gaz deposu tasarlanmistir. Kurulan sistemde hidrolik bekleme suresi 30 gun, gunluk besleme miktari 0,6 m 3 ‘dur. Kullanilan gubre 1:1 oraninda 45 o C sicaklikta su ile karistirilip sisteme beslenmektedir. Reaktore giren ve cikan buyuk bas hayvan gubresinin karakterizasyonu yapilmis ve OM, TOC, TN, C/N, pH, EC, KOI ve KOI giderim verimleri biyogaz uretimi icin uygun bulunmustur. Ayrica uretilen biyogazin kompozisyonu incelenmis ve biyogazin %59.26 CH 4 , %32.45 CO 2 , %2.92 O 2 ve %2.06 H 2 S’den olustugutespit edilmistir. Calisma kapsaminda elde edilen sonuclar birlikte degerlendirildiginde, buyuk bas hayvan gubrelerinin biyogaz uretiminde kullanilmasinin onemli bir bertaraf alternatifi oldugu ve onerilen kucuk olcekli biyogaz reaktor modelinin bu amac dogrultusunda basari ile kullanilabilecegi gorulmustur.","PeriodicalId":17742,"journal":{"name":"Karaelmas Science and Engineering Journal","volume":"75 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78995565","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: 1
Sigortacılık Sektöründe Müşteri İlişki Yönetimi İçin Kümeleme Analizi
Karaelmas Science and Engineering Journal Pub Date : 2018-06-26 DOI: 10.7212/ZKUFBD.V7I2.664
Buket Doğan, Ali Buldu, Önder Demir, Bahar Erol
{"title":"Sigortacılık Sektöründe Müşteri İlişki Yönetimi İçin Kümeleme Analizi","authors":"Buket Doğan, Ali Buldu, Önder Demir, Bahar Erol","doi":"10.7212/ZKUFBD.V7I2.664","DOIUrl":"https://doi.org/10.7212/ZKUFBD.V7I2.664","url":null,"abstract":"Teknolojik ilerlemeler insanlar arasi iliskileri etkiledigi kadar sirketlerin musterileri ile olan iliskilerini, satis ve pazarlama sistemlerini, hatta tum kurumsal organizasyonlarini etkilemistir. Musteri iliskileri yonetimi kavrami, musteri odakli bir yaklasimla uzun donemli iliski kurarak sirketin karliligini arttirmayi hedefleyen bir yaklasimdir. Bu kapsamda birbirine benzer nitelikte musterilerin ozelliklerini tanimlamak ve gruplandirmak onemli bir faaliyettir. Bu amacla farkli kaynaklardan alinan musterileri verileri bir araya getirilir ve bu musterilerin karakteristik ozelliklerini belirlemek icin analizler yapilir. Veri madenciligi (VM) bu karakteristik ozelliklerin tespitinde kullanilabilecek veri analizi yontemlerini iceren bir disiplindir. Bu calismada, Turkiye’de faaliyet gosteren bir sigorta sirketinin musterilerine ait veriler VM’nin en cok kullanilan kumeleme algoritmalarindan k-means algoritmasi ile analiz edilmistir. Bu analiz ile elde edilen sonuclar yardimiyla, sirketin benzer musterilerinin ozelliklerini tespit etmesi ve onlara uygun yeni pazarlama stratejileri gelistirebilmesi hedeflenmektedir.","PeriodicalId":17742,"journal":{"name":"Karaelmas Science and Engineering Journal","volume":"147 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83308129","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：481959085
Book学术官方微信