bluuebunny/crossref_metadata_2025_split huggingface dataset:
New bracket and motion control system for distributed photovoltaic power stations
Authors: An Yida , Yu Longkun , Lu Minxi 
Published: May 2021

Abstract
In view of the existing solar panel blackout, affecting the ecological environment, unreasonable spatial distribution, low power generation efficiency, high failure rate, difficult to operate and other issues, design a mechanical uniform solar power bracket: weather conditions, temperature, light strength and other multi-factor evaluation of the way to monitor the state of photovoltaic panels to adjust. According to the latitude and longitude and terrain of photovoltaic plate installation, the periodic movement trajectory is automatically planned, the operation is monitored centrally, and the failure point is located quickly and the operational efficiency is improved by comparing with big data speculation.
Novel ethanol soluble all-furan based copolymer for organic Photovoltaics
Authors: Shang Luwen , He Shenghua , Gao Yueyue 
Published: May 2021

Abstract
A new ethanol soluble all-furan based copolymer (PFF) was firstly designed and synthesized. PFF exhibits strong absorption in the range of 300-700 nm, and presents a highest occupied molecular orbital energy level of – 5.21 eV. The organic photovoltaics based on PFF: PCBO-12 display a low power conversion efficiency (PCE) of 0.49% when fabricated with ethanol. Interestingly, the PCE would be improved to 0.66% along with simultaneous enhancement of all photovoltaic parameters for devices by applying 1.5% p-anisaldehyde additive. The experiment analysis indicates the low PCE of the optimized device is ascribed to severe phase segregation and the large surface roughness of the active layer, which were verified by the TEM and AFM characterization.
Functional localization analysis on pumped storage station under the new situation of energy transformation
Authors: Wen Bo , Huang Defa , Yu Liang 
Published: May 2021

Abstract
The functional localization of pumped storage station is analysed in this paper on the basis of summarize of the new situation and industrial advantages. It is a special power supply with the characteristics of peak shaving, valley filling, frequency modulation, phase modulation, emergency reserve and black start and so on. With the continuous acceleration of energy structural adjustments in China, the new energy power supply development rapidly, the demand for pumped storage station is increasingly urgent and its future growth is very broad.
Exploration on planning and development of pumped storage power stations in China
Authors: Xu Lingjun , Liu Zhihua , Zheng Shuqing 
Published: May 2021

Abstract
Our country has a vast territory and a large population, with the rapid development of economic society, electricity load continues to grow, and the difference between peak and valley load continues to grow also. Pumped Storage Power Station is the most mature large-scale energy storage method at present, and it is an important part of the new power system with new energy as the main body. In order to adapt to the rapid development of wind power, solar power and other new energy, and meet the requirements for safe and stable operation of nuclear power, ensure the safe and reliable operation of the power system, it is necessary to reasonably support and accelerate the construction of pumped storage power stations.
Research on Optimization of Flow Field of Denitration System of 600MW Unit and Modification of Fine Ammonia Injection
Authors: Liao Yunbo , Xue Fangming 
Published: May 2021

Abstract
Aiming at the uneven distribution of flow field in the denitration system of coal-fired power plant boilers, poor mixing of ammonia and nitrogen, increased ammonia escape, and easy blockage of the air preheater, a flow field optimization and transformation plan was proposed through numerical simulation and added in the flue of the denitration system. Equipped with baffles and static mixers, modified the ammonia injection pipeline in zones, implemented ammonia injection total control and grid balance automatic adjustment control. After the transformation of precise ammonia injection for denitrification, the NOx emission of the unit is stably controlled at 40 mg/Nm3, the steady-state deviation value and other indicators are better than the acceptance standard, and the air preheater differential pressure is effectively controlled.
Extraction of natural chitosan oligosaccharides from shell and preparation of natural sunscreen
Authors: Feng Xinyu , Liu Jialin , Huang Xin , Mao Di , Wang Jiaxin , Zhao Jinxiang , Zhang Jingyu 
Published: May 2021

Abstract
Shell is aquatic product processing industry waste, shrimp, crab and shellfish contain heavy metal, cause this kind of waste water deposits, the pollution caused by the Marine area, but the shell and shrimp shell contains rich off acetyl chitosan, chitosan degradation into shell oligosaccharides have many function effect, from the perspective of environmental protection is to deal with some of the pollution, and the preparation of the beneficial shell oligosaccharides. This paper introduces the extraction of chitosan from shrimp shells and the preparation of sunscreen by using physical degradation method to extract chitosan oligosaccharide from chitosan. In this paper, natural chito-oligosaccharides were extracted from shellfish waste and used as ingredients to make natural sunscreen, which was an exploration of chito-oligosaccharides in the field of daily use in fine chemical industry.
Treatment of waste gas from electronic dismantling workshop
Authors: Zeng Huanmu , Deng Gaoya , Chen Dingsheng , Zeng Wenhao , Zhang Guanyuan , Chen Zhihang , Cen Chaoping 
Published: May 2021

Abstract
At present, due to China’s electronic waste treatment technology is not mature enough. In the market, a large number of electronic wastes into the household dismantling workshop and through simple, inefficient, extensive way to recycle. After the extraction of valuable resources, the remaining toxic and harmful substances are discharged at will, resulting in a high level of toxic and harmful pollutants in the air of the region. The deposition of harmful and harmful pollutants in the air also further leads to the deterioration of the local soil, water and other ecological environment, threatening the health and survival of local residents. The paper takes the exhaust gas from electronic waste dismantling process based on family workshop of Guiyu town as the experimental object. Water absorption and activated carbon adsorption were applied to treat exhaust gas. And the ferreite precipitation was used to treat the recirculated wastewater after spray system. The experiment results indicate that the lead cadmium, tin and its compounds and benzene series could be removed above 95% after water absorption and active carbon adsorption. The lead, cadmium and copper in recirculated wastewater respectively could be removed 96.69%, 79.76% and 90.82% after ferrite precipitation process.
Synthesis and Properties of Poly (DL-lactide)/Poly (Ethylene Glycol) Diblock Copolymer
Authors: Chen Xiaoqi , Tian Jia , Bai Lu , Zhou Haijun , Zhou Mengmeng , Xiao Jijun , Li Yantao 
Published: May 2021

Abstract
Poly (DL-lactide)/Poly (Ethylene Glycol) Diblock Copolymer is successfully synthesized with mPEG and DL-LA as main raw materials. FT-IR, 1H-NMR and DSC are used to study the influence of precipitant species and dosage on the properties of copolymer; and the effects of the m (mPEG)/m(LA)’s ratio on the copolymer’s molecular weight (Mn), glass transition temperature (Tg) and the properties of residual monomers. The results showed that the precipitant was ether, dichloromethane / ether was 1/6, m (m PEG)/m (LA) was 2/1.8, the synthesized Poly (DL-lactide)/Poly (Ethylene Glycol) Diblock Copolymers, the residual monomer was only 0.26 and the solvent residue was only 0.04.
Preparation of bisphenol A polyaryl ether nitrile microporous foam
Authors: Qi Qing , Lei Yajie , Liu Xiaobo 
Published: May 2021

Abstract
Different foam structure of bisphenol A polyarylene ether nitrile (BPA-PEN) foams were prepared by supercritical carbon dioxide foaming method. First, BPA-PEN films obtained by solution casting method. The properties of BPA-PEN films and foams were characterized by scanning electron microscope (SEM), infrared spectrometer (FTIR), thermogravimetric analysis (TGA) and tensile test. The cell morphology of BPA-PEN foams with different adsorption pressure and foaming time have been investigated. The foaming temperature and saturation pressure have a great influence on the cell size and cell density of BPA-PEN foams. As the foaming temperature increases, when the foaming temperature is closer to the optimal foaming temperature, the viscosity of the BPA-PEN/CO2 homogeneous system become lower, which promotes the diffusion rate of CO2 in BPA-PEN and promotes the growth of bubbles. At the same time, the plasticizing effect of gas reduces the glass transition temperature of BPA-PEN/CO2. The best foaming temperature of BPA-PEN is 150 °C. When the foaming temperature exceeds the optimal foaming temperature, the cell density decreases, the cell wall becomes thicker, and the cell distribution becomes uneven. The mechanical properties of BPA-PEN changed significantly before and after foaming.
Study on Impact Damage Characteristics of PTFE/Al/W Reactive Materials
Authors: Zhou Jingyuan , Zou Xuan , Liu Ping , Ran Xianwen , Tang Wenhui 
Published: May 2021

Abstract
Reactive material is a promising new energetic material. In this paper, the damage characteristics of PTFE / Al / W reactive material impacting on double-layer aluminum target are studied by experiments, and the experimental process is simulated by numerical simulation. The experimental results show that when the reactive material impacts the double-layer thin aluminum target, there is almost no reaction when it impacts the first target plate, and the reaction mainly occurs when it impacts the second target plate. Compared with the simulation results, it is proved that the ignition growth model can be used in the simulation calculation of reactive materials.
Properties of Hyaluronic Acid Nanoparticles Modified by Histidine for Embedding Flavonoids
Authors: Wang Peng , Guo Li , Chai Yunlei , Ma Xue 
Published: May 2021

Abstract
Hyaluronic acid (HA) was modified by histidine (His) to prepare His-HA conjugate, and flavonoid-containing mixed nanoparticles were embedded by formamide and dimethylformamide with ultrasonic treatment. The porosity, swelling degree, encapsulation efficiency, drug loading and in vitro release of nanoparticles were measured for embedding capacity. The results showed that the prepared His-HA conjugate with ratio of 9:1 had a high buffering capacity at endosome pH 6.0, and the rate of encapsulation and drug loading for embedding effect were 50%∼80% and 8%∼13% respectively.
Current situation and prospect of Denitration technology in nonferrous smelting industry
Authors: Fang Wang 
Published: May 2021

Abstract
Air pollution control of the non-ferrous industry is mainly concentrated on the dust and SO2 in the flue gas. NOx control has just started. The relevant standards and specifications are still constantly updated and improved, control technology is also learning from other industries on the basis of continuous exploration and innovation. Through analyzing the NOx emission characteristics and emission standard requirements of non-ferrous smelting industry, this paper points out the current situation and development trend of the non-ferrous smelting industry.
Microstructure and mechanical properties of pure magnesium prepared by CEE-AEC at different temperatures
Authors: Zhang Heng , Zheng Jie , Shi Yusha , Ji Jinsheng , Zhang Jishi , Zhang Zhimin , Xue Yong 
Published: May 2021

Abstract
Cyclic expansion extrusion with an asymmetrical extrusion cavity (CEE-AEC) was carried out on pure magnesium up to 3 passes at different deformation temperatures of 250 °C and 350 °C. The microstructure and texture evolution of its edge and center regions are studied respectively, and their mechanical properties are correlated. The results show that there is an incomplete dynamic recrystallization (DRX) region in pure magnesium deformed at 250 °C. Therefore, pure magnesium processing at 250 °C has a larger grain size and higher texture strength than that processing at 350 °C. According to the tensile test, the ultimate tensile strength (UTS) of different positions of different temperatures is very close because the DRXed grains grow at 350 °C. But the value of tensile yield strength (TYS) is nearly doubled, the main reasons are that the effect of (0001) basal slip and texture softening is greater than that of grain refinement.
Relative trajectories of two charged sedimenting particles in a Stokes flow
Authors: Trombley Chris I , Ekiel-Jeżewska Maria L 
Published: May 2021

Abstract
We study the dynamics of two charged point particles settling in a Stokes flow.We find what ranges of initial relative positions and what ranges of system parameters lead to formation of stable doublets.The system is parameterized by the ratio of radii, ratio of masses and the ratio of electrostatic to gravitational force.We focus on opposite charges.We find a new class of stationary states with the line of the particle centers inclined with respect to gravity and demonstrate that they are always locallyasymptotically stable. Stability properties of stationary states with the vertical line of the particle centers are also discussed.We find examples of systems with multiple stable stationary states.We show that the basin of attraction for each stable stationary state has infinite measure, so that particles can capture one another even when they are very distant, and even if their charge is very small. This behavior is qualitatively different from the uncharged case where there only exists a bounded set of periodic relative trajectories.We determine the range of ratios of Stokes velocities and ratio masses which give rise to non-overlapping stable stationary states (given the appropriate ratio of electrostatic to gravitational force). For non-overlapping stable inclined or vertical stationary states the larger particle is always above the smaller particle. The non-overlapping stable inclined stationary states existonly if the larger particle has greater Stokes velocity, but there are non-overlapping stable vertical stationary states where the larger particle has higher or lower Stokes velocity.
MorphoScript: a dedicated analysis to assess the morphology and contractile structures of cardiomyocytes derived from stem cells
Authors: Homan Tess , Delanoë-Ayari Hélène , Meli Albano C , Cazorla Olivier , Gergely Csilla , Mejat Alexandre , Chevalier Philippe , Moreau Adrien 
Published: May 2021

Abstract

Motivation
Cardiomyocytes derived from stem cells are closely followed, notably since the discovery in 2007 of human induced pluripotent stem cells (hiPSC). Cardiomyocytes (hiPSC-CM) derived from hiPSC are indeed more and more used to study specific cardiac diseases as well as for developing novel applications such as drug safety experiments. Robust dedicated tools to characterize hiPSC-CM are now required. The hiPSC-CM morphology constitutes an important parameter since these cells do not demonstrate the expected rod shape, characteristic of native human cardiomyocytes. Similarly, the presence, the density and the organization of contractile structures would be a valuable parameter to study. Precise measurements of such characteristics would be useful in many situations: for describing pathological conditions, for pharmacological screens or even for studies focused on the hiPSC-CM maturation process.

Results
For this purpose, we developed a MATLAB based image analysis toolbox, which gives accurate values for cellular morphology parameters as well as for the contractile cell organization.

Availability and implementation
To demonstrate the power of this automated image analysis, we used a commercial maturation medium intended to promote the maturation status of hiPSC-CM, and compare the parameters with the ones obtained with standard culture medium, and with freshly dissociated mouse cardiomyocytes.

Supplementary information
Supplementary data are available at Bioinformatics online.
scDetect: a rank-based ensemble learning algorithm for cell type identification of single-cell RNA sequencing in cancer
Authors: Shen Yifei , Chu Qinjie , Timko Michael P , Fan Longjiang 
Published: May 2021

Abstract

Motivation
Single-cell RNA sequencing (scRNA-seq) has enabled the characterization of different cell types in many tissues and tumor samples. Cell type identification is essential for single-cell RNA profiling, currently transforming the life sciences. Often, this is achieved by searching for combinations of genes that have previously been implicated as being cell-type specific, an approach that is not quantitative and does not explicitly take advantage of other scRNA-seq studies. Batch effects and different data platforms greatly decrease the predictive performance in inter-laboratory and different data type validation.

Results
Here, we present a new ensemble learning method named as ‘scDetect’ that combines gene expression rank-based analysis and a majority vote ensemble machine-learning probability-based prediction method capable of highly accurate classification of cells based on scRNA-seq data by different sequencing platforms. Because of tumor heterogeneity, in order to accurately predict tumor cells in the single-cell RNA-seq data, we have also incorporated cell copy number variation consensus clustering and epithelial score in the classification. We applied scDetect to scRNA-seq data from pancreatic tissue, mononuclear cells and tumor biopsies cells and show that scDetect classified individual cells with high accuracy and better than other publicly available tools.

Availability and implementation
scDetect is an open source software. Source code and test data is freely available from Github (https://github.com/IVDgenomicslab/scDetect/) and Zenodo (https://zenodo.org/record/4764132#.YKCOlrH5AYN). The examples and tutorial page is at https://ivdgenomicslab.github.io/scDetect-Introduction/. And scDetect will be available from Bioconductor.

Supplementary information
Supplementary data are available at Bioinformatics online.
Three-dimensional simulation of aesthetic outcome from breast-conserving surgery compared with viewing photographs or standard care: randomized clinical trial
Authors: Godden A R , Micha A , Wolf L M , Pitches C , Barry P A , Khan A A , Krupa K D C , Kirby A M , Rusby J E 
Published: May 2021

Abstract

Introduction
Over half of women with surgically managed breast cancer in the UK undergo breast-conserving treatment (BCT). While photographs are shown prior to reconstructive surgery or complex oncoplastic procedures, standard practice prior to breast conservation is to simply describe the likely aesthetic changes. Patients have expressed the desire for more personalized information about likely appearance after surgery. The hypothesis was that viewing a three-dimensional (3D) simulation improves patients’ confidence in knowing their likely aesthetic outcome after surgery.

Methods
A randomized, controlled trial of 117 women planning unilateral BCT was undertaken. The randomization was three-way: standard of care (verbal description alone, control group), viewing two-dimensional (2D) photographs, or viewing a 3D simulation before surgery. The primary endpoint was the comparison between groups’ median answer on a visual analogue scale (VAS) for the question administered before surgery: ‘How confident are you that you know how your breasts are likely to look after treatment?’

Results
The median VAS in the control group was 5.2 (i.q.r. 2.6–7.8); 8.0 (i.q.r. 5.7–8.7) for 2D photography, and 8.9 (i.q.r. 8.2–9.5) for 3D simulation. There was a significant difference between groups (P &lt; 0.010) with post-hoc pairwise comparisons demonstrating a statistically significant difference between 3D simulation and both standard care and viewing 2D photographs (P &lt; 0.010 and P = 0.012, respectively).

Conclusion
This RCT has demonstrated that women who viewed an individualized 3D simulation of likely aesthetic outcome for BCT were more confident going into surgery than those who received standard care or who were shown 2D photographs of other women. The impact on longer-term satisfaction with outcome remains to be determined.
Registration number: NCT03250260 (http://www.clinicaltrials.gov).
DOP63 The Toronto IBD global endoscopic reporting (TIGER) score is well correlated with fecal calprotectin and IBD Disk in Ulcerative Colitis patients
Authors: Zittan E , Steinhart A H , Aran H , Milgrom R , Koifman E , Gralnek I M , Zelber-Sagi S , Silverberg M S 
Published: May 2021

Abstract

Background
Commonly used endoscopic indices in IBD lack ability to provide overall disease burden and severity, generate low inter-observer agreement, and demonstrate incomplete validation of some scores. We developed a new endoscopic reporting tool, the Toronto IBD Global Endoscopic Reporting (TIGER) score for Crohn’s disease (CD) and ulcerative colitis (UC) patients. The aim of our study was to compare the usability and validity of the TIGER score against fecal calprotectin (FC), C-reactive protein (CRP) and IBD DISK score in UC patients.

Methods
A cohort of 53 UC patients participated in the study. Blinded IBD experts reviewed and graded ileocolonoscopy videos. In the validation phase, the TIGER score was compared to (1) the Mayo endoscopic score serving as a reference standard and; (2) inflammatory biomarkers FC, CRP and; (3) IBD Disk.

Results
Inter-observer reliability of the TIGER score per segment between reviewers was excellent, Interclass Correlation Coefficient (ICC)=0.94; [95%CI: 0.92–0.96]. For categorized TIGER score, lowest overall agreement was 96.6% [95%CI: 93.5–98.6] and lowest kappa 0.91 [95%CI: 0.84–0.98], reflecting excellent agreement. Overall agreement per segment between Mayo endoscopic score and TIGER was 84% [95%CI:74%-90%] and kappa coefficient 0.60 [95%CI: 0.42–0.808]. Per subject analysis for UC yielded overall agreement of 80% [95%CI: 64–91] and kappa coefficient 0.44 [95%CI: 0.14–0.75]. There was a significant correlation between TIGER and FC (r s = .794, p &lt; .0001). There was a significant correlation between TIGER and IBD Disk (r s = .613, p &lt; .0001). As expected, there was a lower correlation between TIGER score and CRP (r s = .309, p &lt; .0850) in UC patients.

Conclusion
The TIGER endoscopic score demonstrates significant correlation with FC and IBD disk score in ulcerative colitis patients and thus can be used as a reliable and simple endoscopic score for UC patients to capture overall endoscopic disease burden.