scholarly journals Implementasi Single Pass Clustering pada Preprocessing Temu Kembali Koleksi Berita Teks

2020 ◽  
Vol 6 (1) ◽  
pp. 86
Author(s):  
Faisal Rahutomo ◽  
Dwi Puspitasari ◽  
Trie Endah Sulistyoningrum
Keyword(s):  
Single Pass ◽  
Cluster Threshold

Berita saat ini masih menjadi sumber yang dipercaya untuk mendapatkan informasi. Namun seiring dengan perkembangan teknologi berita yang terbit menjadi semakin banyak jumlahnya. Akibat dari jumlah berita yang banyak diperlukan suatu sistem yang dapat dipergunakan untuk menemukan berita dengan cepat. Sistem Temu Kembali menjadi cara yang dapat dipergunakan untuk membantu menangani masalah tersebut. Sistem temu kembali yang ada masih terus dikaji efisiensinya jika berhubungan dengan jumlah informasi yang sangat besar. Makalah ini melakukan pengujian efektifitas dan efisiensi tambahan preprocessing pada sistem temu kembali. Langkahnya yaitu mengklasterkan informasi yang ada terlebih dahulu. Pada preprocesing ini diimplementasikan metode single pass clustering. Kemudian pencocokan query dengan dokumen disederhanakan kepada pencocokan query dengan centroid klaster. Hasil uji coba efisiensi menunjukkan bahwa sistem temu kembali yang mengimplementasikan single pass clustering mampu mencari berita dengan lebih cepat. Sedangkan pengujian efektifitas untuk mengetahui seberapa tepat berita yang bisa diketahui dari nilai pengujian precision, recall, dan f-score. Dari pengujian tersebut didapatkan hasil jika proses pencarian paling tepat dilakukan pada cluster dengan nilai threshold 0,1. Pengujian pada cluster threshold 0,1, f-score terbaik didapatkan ketika dilakukan proses temu kembali berita dengan keyword ‘4g lte’ bernilai 0,732. Sedangkan pengujian f-score terburuk terdapat pada pengujian dengan keyword ‘aplikasi whatsapp’ dengan nilai 0,111. Sedangkan secara umum, sistem yang diusulkan selalu lebih cepat hanya saja lebih rendah nilai performa precision, recall, dan f-score-nya.

Single-Pass Data Access for Multi-Fragment Effects Rendering on GPUs

2011 ◽  
Vol 34 (3) ◽  
pp. 473-481
Author(s):  
Guo-Fu XIE ◽  
Wen-Cheng WANG
Keyword(s):  
Data Access ◽  
Single Pass

scholarly journals Multiple-Bounce Scattering of Tomo-SAR in Single-Pass Mode for Building Reconstructions

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 124341-124350
Author(s):  
Ruichang Cheng ◽  
Xingdong Liang ◽  
Fubo Zhang ◽  
Qichang Guo ◽  
Longyong Chen
Keyword(s):  
Single Pass

scholarly journals Physics basis for the ICRF system of the SPARC tokamak

2020 ◽  
Vol 86 (5) ◽  
Author(s):  
Y. Lin ◽  
J. C. Wright ◽  
S. J. Wukitch
Keyword(s):  
Alpha Particles ◽  
Fast Wave ◽  
Vacuum Vessel ◽  
Auxiliary Heating ◽  
Heating Method ◽  
Full Field ◽  
Single Pass ◽  
Wave Absorption ◽  
Port Design ◽  
Icrf Heating

Ion cyclotron range of frequencies (ICRF) heating will be the sole auxiliary heating method on SPARC for both full-field (Bt0 ~ 12 T) D–T operation and reduced field (Bt0 ~ 8 T) D–D operation. Using the fast wave at ~120 MHz, good wave penetration and strong single-pass absorption is expected for D–T(3He), D(3He), D(H) and 4He(H) heating scenarios. The dependences of wave absorption on ${k_\parallel }$ , 3He concentration, resonance location, antenna poloidal location and losses on alpha particles and ash have been studied. The antenna loading has been assessed by comparison with the Alcator C-Mod antennae. An antenna spectrum of ${k_\parallel }\sim 15\text{--}18\,{\textrm{m}^{ - 1}}$ is shown to be good for both core absorption and edge coupling. For the control of impurity sources, the antenna straps are rotated ~10° to be perpendicular to the B field and the straps can run with different power levels in order to optimize the antenna spectrum and to minimize the image current on the antenna frame. Combining the physics constraints with the SPARC port design, maintenance requirement and contingency against antenna failure during D–T operation, we plan to mount on the inner wall of the vacuum vessel a total of 12 4-strap antennae in 6 ports while keeping 3-strap antennae that are insertable and removable on port plugs as the backup option.

Achieving single-pass high-reduction rolling and enhanced mechanical properties of AZ91 alloy by RD-ECAP pre-processing

2021 ◽  
Vol 804 ◽  
pp. 140717
Author(s):  
Yuhua Li ◽  
Yaqing Jiang ◽  
Qiong Xu ◽  
Aibin Ma ◽  
Jinghua Jiang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Az91 Alloy ◽  
Single Pass ◽  
High Reduction

scholarly journals Low energy dark current collimation system in single-pass linacs

2018 ◽  
Vol 21 (2) ◽  
Author(s):  
S. Bettoni ◽  
P. Craievich ◽  
M. Pedrozzi ◽  
M. Schaer ◽  
L. Stingelin
Keyword(s):  
Dark Current ◽  
Low Energy ◽  
Single Pass ◽  
Collimation System

scholarly journals A Single-Pass Type I Membrane Protein from the Apicomplexan Parasite Cryptosporidium parvum with Nanomolar Binding Affinity to Host Cell Surface

2021 ◽  
Vol 9 (5) ◽  
pp. 1015
Author(s):  
Tianyu Zhang ◽  
Xin Gao ◽  
Dongqiang Wang ◽  
Jixue Zhao ◽  
Nan Zhang ◽  
...  
Keyword(s):  
Membrane Protein ◽  
Cell Surface ◽  
Host Cell ◽  
Binding Affinity ◽  
Cryptosporidium Parvum ◽  
Host Cells ◽  
Watery Diarrhea ◽  
Type I ◽  
Single Pass ◽  
Host Cell Surface

Cryptosporidium parvum is a globally recognized zoonotic parasite of medical and veterinary importance. This parasite mainly infects intestinal epithelial cells and causes mild to severe watery diarrhea that could be deadly in patients with weakened or defect immunity. However, its molecular interactions with hosts and pathogenesis, an important part in adaptation of parasitic lifestyle, remain poorly understood. Here we report the identification and characterization of a C. parvum T-cell immunomodulatory protein homolog (CpTIPH). CpTIPH is a 901-aa single-pass type I membrane protein encoded by cgd5_830 gene that also contains a short Vibrio, Colwellia, Bradyrhizobium and Shewanella (VCBS) repeat and relatively long integrin alpha (ITGA) N-terminus domain. Immunofluorescence assay confirmed the location of CpTIPH on the cell surface of C. parvum sporozoites. In congruence with the presence of VCBS repeat and ITGA domain, CpTIPH displayed high, nanomolar binding affinity to host cell surface (i.e., Kd(App) at 16.2 to 44.7 nM on fixed HCT-8 and CHO-K1 cells, respectively). The involvement of CpTIPH in the parasite invasion is partly supported by experiments showing that an anti-CpTIPH antibody could partially block the invasion of C. parvum sporozoites into host cells. These observations provide a strong basis for further investigation of the roles of CpTIPH in parasite-host cell interactions.

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