I expected Postgresql to use an indexed access method, but in certain cases it is using a sequential scan. Details are below: Table: P1_NRN_ROAD ( sobjid int8 primary key, v int8 not null, ord int2 not null) * The table contains 1.1 million rows. *...
Hein F; Meyer T; Hadamitzky M;.Prospective ECG-triggered se- quential scan protocol for coronary dual-source CT angiography:initial experience.lnt J Cardiovasc Image.2009.231-239Hein F, Meyer T, Hadamitzky M et al. (2009) Prospective ECG-triggered sequential scan protocol for coronary dual-...
CSTPM, STBFM and CST-SPMiner algorithmsdiscovering (closed) spatio-temporal sequential patterns. In our comparison, we showed the number of discovered patterns and execution time of each of algorithms for the same parameters of participation index threshold and neighborhood specification....
From the original 114 sample, four participants were excluded due to being late for scan and not able to finish the generalization task (two participants), or task failure of delivering shock (two participants). Twenty-two additional participants (15 TE and 7 HC) were excluded with greater ris...
The scan resolution was 512 × 512 pixels. The t-SNE 3D representation was obtained using an open source MATLAB tool distributed by Laurens van der Maaten. The DBSCAN was implemented using the open source Python library distributed by scikit-learn.org.54 Code availability The codes generated...
The dose of gonadotropins was individualized according to the patient’s age and previous stimulation history or response to stimulation, started after confirmation of downregulation by transvaginal scan on days 4–5 of the period, and continued for five days after which the dose was adjusted ...
Now let’s look at the alternative: table-scan the fact table, and do index lookups in the two dimension tables. MySQL doesn’t want to choose this join order, so we’ll force it with STRAIGHT_JOIN:1 2 3 4 5 6 7 8 explain select STRAIGHT_JOIN ... +---+---+---+---+ | ...
Biometry was performed with the IOL Master (Carl-Zeiss AG, Oberkochen, Germany). However, in cases of high lens opacity, patients had axial length measured with an A-scan ultrasound (Ocuscan, Alcon, Hünenberg, Switzerland). In five cases, where patients were unable to cooperate, the biometry...
Semi-empirical or multi-scan absorption corrections (SADABS) were applied40. All structures were solved by the Patterson function, completed by subsequent difference Fourier map calculations, and refined by full- matrix least-squares on F2 with all the data using the SHELXTL program package41. All...
70preliminarystudyonultralowtubevoltage4070kv41sequentialscan 系统标签: 剂用量cta冠状动脉电压低超低对比 作者单位: 100730 北京,中国医学科学院北京协和医院放射科(曹剑、易妍、王怡宁、林路、王明、孔令燕、薛华丹、宋兰、王志伟、王少华、金征 宇); 210002 南京,南京军区南京总医院放射科(张龙江、卢光明) 作者简介...