Quantization and Training of Neural Networks for Efficient Integer-Arithmetic-Only Inference

The rising popularity of intelligent mobile devices and the daunting computational cost of deep learning-based models call for efficient and accurate on-device inference schemes. We propose a quantization scheme that allows inference to be carried out using integer-only arithmetic, which can be implemented more efficiently than floating point inference on commonly available integer-only hardware. We also co-design a training procedure to preserve end-to-end model accuracy post quantization. As a result, the proposed quantization scheme improves the tradeoff between accuracy and on-device latency. The improvements are significant even on MobileNets, a model family known for run-time efficiency, and are demonstrated in ImageNet classification and COCO detection on popular CPUs.Comment: 14 pages, 12 figure

Investigation of sorption properties in crushed autoclaved aerated concrete waste

Due to hardening in autoclaves and mechanical processing of autoclaved aerated concrete (AAC) massive, the process of production of AAC unavoidably generates waste. Up to now, there were no ways for utilisation of this type of waste. The article deals with the adsorption effectiveness of crushed autoclaved aerated concrete waste (CAACW). It was established that the ability of CAACW to adsorb certain liquids (water, diesel fuel, used engine oil) depends on viscosity of liquid which, in its turn, influences the depth of adsorption. Subject to this index, the CAACW was divided into two fractions: powder (size up to 2.50 mm) and crumbs (size from 2.50 to 10.0 mm). It was found that oil products of different kinematic viscosity are fully adsorbed by CAACW powder, i.e. diesel fuel 0.52 g/g in 18 min, and used engine oil 0.39 g/g in 1 h 15 min. The CAACW crumbs, processed by 2.00% FeSO4 solution and dried to 3.50% of residual moisture are suitable as litter for cats. The practical use of CAACW will help us solve two important environmental problems: on the one hand – to recover the industrial waste, on the other – to prevent ground pollution by effused oil products. Santrauka Autoklavinio akytojo betono (AAC) gamybos proceso metu kietinus autoklave ir gautą masyvą mechaniškai apdirbus neišvengiamai susidaro atliekos, kurios iki šiol nėra tinkamai perdirbamos. Straipsnyje nagrinėjama smulkintų AAC atliekų sorbcinė geba. Nustatyta, kad kai kurių skysčių (vandens, dyzelino, vartotos mašininės alyvos) sugėrimo efektyvumas priklauso nuo skysčio klampio, kuris savo ruožtu lemia skysčio įsigėrimo gylį į sorbento bandinius. Atsižvelgiant į šį rodiklį, smulkintos AAC atliekos buvo suskirstytos į dvi frakcijas: miltelius (dydis iki 2,5 mm) ir trupinius (dydis nuo 2,5 iki 10,0 mm). Nustatyta, kad skirtingo klampio naftos produktai įgeriami AAC milteliais: dyzelinas – 0,52 g/g per 18 min, o vartota mašininė alyva – 0,39 g/g per 1 h 15 min. Trupintos AAC atliekos, apdorotos 2,0% koncentracijos FeSO4 tirpalu ir išdžiovintos iki 3,5% likutinio masės drėgnio, yra tinkamos naudoti kaip kačių kraikas. Praktinis trupintų AAC atliekų naudojimas leis iš karto spręsti dvi svarbias ekologines problemas: pirmuoju atveju – utilizuoti pramonines atliekas, antruoju – stabdyti grunto taršą dėl išsiliejusių naftos produktų. Резюме В процессе изготовления автоклавного ячеистого бетона после твердения в автоклаве с последующей механической обработкой массива неизбежно накапливаются отходы, которые до сих пор должным образом не утилизировались. В статье представлены результаты исследования сорбционной способности измельченных отходовавтоклавного ячеистого бетона. Установлено, что эффективность поглощения некоторых жидкостей (воды, дизелина, отработанного машинного масла) этими отходами зависит от вязкости жидкости, которая, в свою очередь,определяет глубину поглощения жидкости образцами сорбента. В зависимости от этого показателя отходы ячеистого бетона были разделены на две фракции: порошок (крупность частиц составляла до 2,5мм) и крошку (крупность частиц – от 2,5 до 10 мм). Установлено, что жидкие нефтяные продукты в зависимости от их кинетическойвязкости полностью насыщают порошкообразные отходы, а именно: дизелин – 0,52 г/г за 18 мин, отработанноемашинное масло – 0,39 г/г за 1ч 15 мин. Крошкообразные отходы, обработанные 2,0%м раствором FeSO4 и высушенные до 3,5% остаточной массовой влажности могут применяться в качестве наполнителя для кошачьих туалетов. Практическое применение измельченных отходов автоклавного ячеистого бетона позволяет одновременнорешить две экологические проблемы: вопервых, утилизировать промышленные отходы, а вовторых, предотвратить загрязнение грунта разлившимися нефтепродуктами. Reikšminiai žodžiai: autoklavinis akytasis betonas, pramonėsatliekos, sorbentai, sorbcinės savybės, kalcio hidrosilikatai, makrostruktūra, naftos produktai, kačių kraikas Ключевые слова: автоклавный ячеистый бетон, промышленные отходы, сорбенты, сорбционные свойства, гидросиликаты кальция, макроструктура, нефтяные продукты, наполнитель для кошачьих туалето

Impact of granules from crushed expanded polystyrene package on properties of thermo-insulating plaster

The paper deals with the use of lightweight porous aggregate, i.e. crushed expanded polystyrene package crumbs (EPSC) in the composition of thermo-insulating plaster. Its effectiveness is compared to that of spherical granules of expanded polystyrene – white coloured (EPS) and grey coloured (NEOPOR). The content of lightweight aggregate changed from 1.25 to 1.75 l/kg of dry mix. The investigation focused on properties of modified plaster, such as density, compressive strength, thermal conductivity and water vapour permeability. It was established that EPSC reduce density of plaster from 1350 to 530 kg/m3, improving such properties as thermal conductivity and water vapour permeability but decreasing compressive strength. In addition, the paper established the adhesion force of plaster (content of lightweight aggregate was 1.25 l/kg of dry mix) to ceramics, silicate and autoclaved aerated concrete masonry elements. The character of macrostructure of plaster was considered, as well as bonding with a coat of decorative paint. It was found that plaster with EPSC has similar properties to plasters with EPS and NEOPOR aggregates; however, in case of EPSC, the relative vapour resistance is better. The provided regression equations can be used for prediction of differently modified plasters

Association of Biomarker Cutoffs and Endoscopic Outcomes in Crohn's Disease: A Post Hoc Analysis From the CALM Study

Abstract Background CALM was a randomized phase 3 trial in patients with Crohn's disease (CD) that demonstrated improved endoscopic outcomes when treatment was escalated based on cutoffs for inflammatory biomarkers, fecal calprotectin (FC), C-reactive protein (CRP), and CD Activity Index (CDAI) remission vs CDAI response alone. The purpose of this post hoc analysis of CALM was to identify drivers of treatment escalation and evaluate the association between biomarker cutoff concentrations and endoscopic end points. Methods The proportion of patients achieving CD Endoscopic Index of Severity (CDEIS) <4 and no deep ulcers 48 weeks after randomization was evaluated according to CRP <5 mg/L or ≥5 mg/L and FC <250 μg/g or ≥250 μg/g. Subgroup analyses were performed according to disease location, and sensitivity analyses were conducted in patients with elevated CRP and/or FC at baseline. The association between endoscopic end points and biomarker cutoffs was performed using χ 2 test. Results The proportion of patients who achieved the primary end point CDEIS <4 and no deep ulcers was significantly greater for those with FC <250 µg/g (74%; P < 0.001), with an additive effect for CRP <5 mg/L. The association of FC <250 µg/g with improved endoscopic outcomes was independent of disease location, although the greatest association was observed for ileocolonic disease. Fecal calprotectin <250 µg/g, CRP <5 mg/L, and CDAI <150 gave a sensitivity/specificity of 72%/63% and positive/negative predictive values of 86%/42% for CDEIS <4 and no deep ulcers 48 weeks after randomization. Conclusion This post hoc analysis of CALM demonstrated that a cutoff of FC <250 µg/g is a useful surrogate marker for mucosal healing in CD

A Drosophila-centric view of protein tyrosine phosphatases

AbstractMost of our knowledge on protein tyrosine phosphatases (PTPs) is derived from human pathologies and mouse knockout models. These models largely correlate well with human disease phenotypes, but can be ambiguous due to compensatory mechanisms introduced by paralogous genes. Here we present the analysis of the PTP complement of the fruit fly and the complementary view that PTP studies in Drosophila will accelerate our understanding of PTPs in physiological and pathological conditions. With only 44 PTP genes, Drosophila represents a streamlined version of the human complement. Our integrated analysis places the Drosophila PTPs into evolutionary and functional contexts, thereby providing a platform for the exploitation of the fly for PTP research and the transfer of knowledge onto other model systems

Computer investigations in crimes related with the use of 'Internet".

A generalization of examination practice about the performance of computer-aided investigations of crimes related with the use of "Internet" of computer investigation department of Lithuanian Institute of Forensic Examination is presented in the article. Computers and "Internet" as modern technologies are used in various crimes. The authors point out conditions that prompt use of "Internet" for criminal purposes, analyse most popular cases in sphere of sendees-roguery in "Internet" shops, discuss the possible types of computer investigations, indicate terms and conditions of successful and qualitative examination.Straipsnyje apibendrinama LTEl kompiuterinių tyrimų skyriaus ekspertine praktika atliekant nusikaitimų, susijusių su internetu panaudojimu, kompiuterinius tyrimus. Kadangi kompiuteriai bei internetas - viena iš kompiuterinių technologijų naujovių - gali būti panaudoti darant įvairius nusikaltimus, atkreipiamas dėmesys į sąlygas, skatinančias panaudoti internetu nusikalstamais tikslais, nagrinėjamas dažniausia! pasitaikantis atvejis paslaugų sferoje sukčiavimas internete parduotuvėse, aprašomas galimas kompiuterinio tyrimo būdas, nurodomos tyrimo sėkmės prielaidos ir sąlygos tyrimo kokybei pagerinti

Computational Data Modeling for Network-Constrained Moving Objects

Advances in wireless communications, positioning technology, and other hardware technologies combine to enable a range of applications that use a mobile user's geo-spatial data to deliver online, location-enhanced services, often referred to as location-based services. Assuming that the service users are constrained to a transportation network, this paper develops data structures that model road networks, the mobile users, and stationary objects of interest. The proposed framework encompasses two supplementary road network representations, namely a two-dimensional representation and a graph representation. These capture aspects of the problem domain that are required in order to support the querying that underlies the envisioned location-based services

Investigations of hydro- and hygro-sorption properties of silicate masonry products

The study deals with the hydro- and hygro-sorption properties in silicate masonry products of multilayer enclosure structure, such as sorption moisture content, capillary water adsorption, water vapour permeability, water absorption and impact of the impregnation of aplite face brick surface by hydrophobic liquid SILRES BS16 on its frost resistance. It was established that moisture content in silicate products may vary from 1.65 % to 12.0 % subject to operation conditions. The investigations showed that upon determination of frost resistance no visible injuries were observed on the wall surface after 50 cycles of freezing