bluuebunny/crossref_metadata_2025_split huggingface dataset:
Judgement and calculation method research of onset of nucleate boiling under tube outside pool boiling condition
Authors: Liu Yanbin , Meng Xiangyu , Wang Xuesheng , Yuan Yuyang 
Published: March 2021

Abstract
Pool boiling is a common phenomenon and widely utilized to realize the heat transfer process in different fields. In advanced nuclear power plant such as the AP1000 passive safety system, pool boiling is also used to fulfil the residual heat removal function through the Passive Residual Heat Removal Heat Exchanger (PRHR HX). The onset of nucleate boiling (ONB) point is one of the key points during heat transfer mechanism changing process. The judgement and predicted method of the ONB under tube outside pool boiling condition is still a difficulty and needs further investigation. In this paper, the heat transfer characteristic of the ONB point is experimentally studied by combining with high speed camera technology. Base on the observing and calculating results, the ONB point is judged. The applicabilities of different ONB point predicting correlations are estimated and an empirical correlation predicting wall superheat degree more accurately is developed.
Study on Mechanical Properties of P92 Steel Welded Joint of the Main SteamPipe of Ultra Supercritical Unit After 50,000 Hours Service
Authors: Li Xinmei , Zhang Zhongwen , Du Baoshuai , Li Wen , Suo Shuai , Zou Yong , Yin Zhiyi 
Published: March 2021

AbstractCombined with a scanning electron microscope, this paper carried out a tensile test and a bending test to study the mechanical properties of P92 steel welded joint of the main stream pipe after the joint was in service for 50,000 hours. The results show that the tensile strength and hardness of the P92 steel weld metalare higher than those of the base metal after it was treated at a high temperaturefor 50,000 hours, but the plasticity is lower than that of the base metal. This is related to the precipitation and growth of Laves and M23C6phases in the steel during treatment; after the metal was treated at a high temperature for 50,000 hours, the number of Laves phases is larger and the size is bigger than that in the base metal. The Laves phases are precipitated rapidly along the austenite grain boundary and martensite lath boundaryand then distributed in the grain boundary, lath boundary, and plate strip boundary, reducing the strength and toughness of the matrix.
Heat transfer phenomenon and characteristics study of C-shaped tube with nucleate boiling in water tank
Authors: Meng Xiangyu , Liu Yanbin , Wang Xuesheng , Cao Jiaming 
Published: March 2021

Abstract
The Passive Residual Heat Removal Heat Exchanger (PRHR HX) is an important equipment of the passive safety system in advanced nuclear power plants such as AP1000. Heat transfer phenomenon and characteristics study of the PRHR HX has received more and more attention. However, the research of transient heat transfer under C-shaped tube outside pool boiling condition is insufficient and needs further investigation. An experimental facility was built and a series of experiments were conducted. Distributing and changing tendencies of some important parameters including tank water temperature, tube wall temperature and heat transfer coefficient were obtained and analyzed. This study can provide a reference for the thermal hydraulic design for the PRHR HX in nuclear power plant.
Prediction of human thermal sensation based on improved PMV model
Authors: Xu Gang , An Qiqi 
Published: March 2021

Abstract
In the traditional PMV model, the calculation of human skin temperature is only related to the level of human activity. In fact, human skin temperature is related to many factors such as evaporative heat dissipation, radiation and convective heat transfer of human skin. Therefore, it is necessary to introduce human thermal physiological model to modify the skin temperature in PMV model. In addition, considering the impact of human activities on human metabolic rate, the formula of calculating human metabolic rate obtained from Pandolf was introduced to improve the original PMV model. Finally, the model is validated and analyzed with published experimental data. The results show that the improved model can accurately predict the thermal sensation of human body under the test condition, and the predicted thermal sensation is closer to the experimental value than the original PMV model.
Preparation of nitrogen doped CNTs porous carbon materials based on MOF in situ growth and its application in lithium sulfur cathode
Authors: Sun Kaixuan , Liu Shuangke , Wang Danqin , Hong Xiaobin , Li Yujie 
Published: March 2021

Abstract
Porous carbon structure is widely used as sulfur carrier to improve the cycle stability and rate performance of lithium sulfur batteries. However, due to the amorphous carbon structure of porous carbon nanostructures, it is still a big challenge for porous carbon nanostructures to obtain high sulfur content and high sulfur surface density. In order to improve the electronic conductivity of porous carbon, maintain its long cycle life and good rate performance, we prepared N-doped graphitized CNTs by high temperature sintering. CNTs encapsulated bulk porous carbon was prepared using ZIF-67 and melamine as precursors(Co-NC@CNTs/S). The CNTs are “slubby” structure and the tube wall is graphite. Due to the unique structure of Co-NC@CNTs, the positive cathode of Co-NC@CNTs/S has better electrochemical performance than Co-NC/S positive cathode. Under the condition of high sulfur (82wt%), the cathode can not only obtain high discharge capacity (1293mAhg−1 at 0.1C) and excellent rate performance (727.8 mAhg−1), but also achieve long cycle stability of more than 100 cycles (capacity decay rate of each cycle is 0.17%).
Compare of arsenicals form in warfare agents’ destroyed residue by controlled detonation and heating blasting technology
Authors: Ma Bin , You Lijuan , Xu Yong , Xu Jie , Wang Xuefeng 
Published: March 2021

Abstract
As typical arsenicals, lewisite, diphenyl chloroarsine, diphenyl cyanoarsine occupy a large proportion of Japanese abandoned chemical weapons in China. Both heating blasting technology and controlled detonation disposal are regarded as the effective disposal to destroy the molecular structure of chemical agents. In different forms of arsenic product, two destruction methods for chemical weapons have been discussed. Analytical morphology of arsenic showed that arsenicals can be oxidized better and less organic arsenic residue can be reduced by heating blasting technology.
A review of advances in the detection of sulfur mustard based fluorescence
Authors: Ma Bin , Gao Shi , Xu Yong , Zuo Guomin , Wang Xuefeng 
Published: March 2021

Abstract
Sulfur mustard is a vesicant through alkylating that have a garlic-like odor. As extreme toxicity, there has an increased demand to develop effective systems for the detection of sulfur mustard. This review described the research progress of chemical sensors based on fluorophore for the detection of sulfur mustard and its mimic. Focusing on current developments in fluorescence approaches has been used for detection of sulfur mustard, especially approach offers rapid, low limitation, low-cost, real-time and on-site visual detection capability.
The Calculation and Model Block Diagram of the Surface Cd Content of Haibo River from Land Sources
Authors: Yang Dongfang , Zhang Longlei , Wang Qi , Ling Weifeng , Li Haixia 
Published: March 2021

Abstract
Applying the survey data of the Cd content in the water of Jiaozhou Bay in October 1992, from the southern waters of the bay mouth to the southeastern waters, the author calculates out the horizontal loss amount, the vertical disputed amount and the vertical sediment amount of the Cd content in the surface and bottom of the water body and determines the model block diagram of the horizontal and vertical changes of Cd content, based on the content changing models of the horizontal matter and the vertical matter proposed by the author himself. The calculation results show that in October, the absolutely horizontal increase amount of Cd content in the surface and bottom layer is 0.12-0.89μg/L, and the relatively horizontal increase amount of Cd content in the surface and bottom layer is 23.52-74.78%. In the southern waters of the bay mouth, the Cd content in the surface and bottom layer has an absolutely vertical disputed amount of 0.09μg/L, and its relatively vertical disputed amount is 23.07%. In the southeastern waters of the bay, the Cd content in the surface and bottom layer has an absolutely vertical sediment amount of 0.68μg/L, and its relatively vertical sediment amount is 57.14%. There is the Haibo River near the southeastern waters of Jiaozhou Bay. In October, the Cd content of the Haibo River is 0.51μg/L, which is higher than the Cd content of 0.39μg/L carried by ocean currents. It provides a lot of supplements to the ocean currents passing the southeastern waters of the bay. During the horizontal migration of the Cd content in the surface and bottom layer, Haibo River supplements the Cd content in the ocean current with the loss and increase of the surface and bottom layer. Through the horizontal changing model of matter content, the horizontal increase of the surface Cd content is calculated. The absolute increase of the Cd content is 0.12μg/L, and the relative increase is 23.52%. Similarly, the horizontal increase of Cd content in the bottom layer is calculated. The absolute increase of Cd content is 0.89μg/L, and the relative increase is 74.78%. During the vertical migration process, the vertical change of the Cd content in the southern waters of the bay mouth and the southeastern waters of the bay reveals the following law: when the surface Cd content is low, the waters present a vertical dilution of the Cd content at the surface and bottom layer, and there is no Cd content accumulation on the seafloor. When the Cd content in the surface layers is high, the waters present a vertical accumulation of Cd content in the surface and bottom layers, and there is an accumulation of Cd content on the seafloor. According to the formula for calculating the Cd content of river sources proposed by author himself, the Cd content of the surface of Haibo River source from land is calculated to be 1.01 μg/L.
Green Transshipment System at Freight Port Scheme Based on Unmanned Fleet
Authors: Yang Wenbo , Wu Zhouting , Wu Menglin , Chen Danni , Zhu Rongxiao 
Published: March 2021

Abstract
Presently, developed countries such as Japan and the United States have set about building unmanned fleets, while China is still in the initial stage[1]. In terms of hydrogen production from wind power, European countries like Britain and Germany have begun their trials on offshore wind power. By contrast, China has just launched the first industrial test project on onshore wind power hydrogen production in Guyuan, Hebei province with the offshore wind power hydrogen production technology at a developmental stage. Ad hoc network technology has been mature in the application of low-speed and small-range Internet of things, but that in the high-speed and large-range is under preliminary test.
Risk control analysis of safety accident in Hydrogen refueling station based on PHAST software
Authors: Wang Xiaotong , Ma Xiaoxue 
Published: March 2021

Abstract
This paper uses PHAST software to simulate the hydrogen diffusion distance, explosion and jet fire radiation safety distance of hydrogen refueling station under certain conditions. Comparing the code data and the PHAST simulation results, in special circumstances such as high wind speeds and densely populated areas, it is necessary to increase the distance from the crowd gathering place on the basis of the existing code data, and explain the measures taken by the hydrogen refueling station to prevent leakage accident risks.
Research on sludge concentration detection based on image processing
Authors: Zhang Hua 
Published: March 2021

Abstract
Sludge concentration is an important indicator of water quality. Based on the different light reflection characteristics of water and sludge, this paper studies the detection of sludge concentration using image processing technology. Combined with MATLAB tools, this paper uses the probability based illumination nonuniformity correction algorithm and adaptive fuzzy threshold segmentation algorithm to simulate and analyze the sewage image, extract the area characteristics and calculate the sludge concentration. At the same time, compared with the real value, it is concluded that the image processing technology can accurately detect the sludge concentration, which lays the foundation for the solid-liquid separation research.
Safety risks and Countermeasures of Chemical Industry Park in Jiangsu Province
Authors: Wu Fei , Zhu Guiming , Yu Yinglei , Sun Jiajia 
Published: March 2021

Abstract
This paper introduced the basic situation and layout of Chemical Industry Park (concentration) in Jiangsu Province. There are some problems in the park: Due to the relevant planning of chemical industry park is proposed in recent years, part of the park planning is missing, and the planning at all levels is not coordinated; Due to the early site selection and construction of some parks, the lack of overall planning, the problems of planning red line crossing enterprises and residential areas in the park, and the imperfect infrastructure construction of the park; due to the authority of examination and approval for the establishment of institutions and personnel in the park, the responsibilities of some institutions in the park are not clear, and the number of professional supervisors is insufficient; In view of the problems existing in the park, this paper puts forward relevant countermeasures and suggestions from the aspects of the integrity of the park planning, the rationality of the location and layout, the compliance of the organization and personnel, and the importance of the park infrastructure.
Bioinspired synthesis of zinc oxide nanoparticles by using leaf extract of Solanum lycopersicum L. for larvicidal activity of Aedes aegypti L.
Authors: B R Nityasree , Chalannavar Raju Krishna , Kouser Sabia , M S Divakar , Gani Ramesh Sabu , K Sowmyashree , Malabadi Ravindra B 
Published: March 2021

Abstract

Aedes aegypti and Aedes albopictus are the key transmitters of varied life-threatening arbovirus diseases; overuse of synthetic chemicals to target vector-borne diseases has an adverse impact on the environment. Biological agents have proven to be an alternative source to synthetic agents for controlling mosquitoes. In this context, the present study investigated the biosynthesis of ZnO NPs using Solanum lycopersicum leaf extract under the influence of solution combustion synthesis method and assessment of its larvicidal efficacy against Aedes aegypti. Synthesised ZnO NPs were characterised by using UV–vis, FTIR, SEM, EDX and XRD. The physicochemical parameter confirmed the synthesised nanoparticles were highly pure. The UV spectrum showed a strong peak at 352 nm corresponding to bandgap energy 3.01 eV. The SEM indicates the particles were rod-like structures. Further, the EDX analysis primarily confirms the zinc and oxygen without any impurities. The XRD data shows the crystallite size of ZnO Nps was of 40.93 nm. Finally, the aqueous leaf extract and ZnO NPs showed significant (p < 0.05) larvicidal activity at 48 h. However, ZnO NPs revealed high larvicidal effect compared to aqueous extract. From the results, it can be concluded that the bioactive constituents present within the plant extract act as capping and reducing agents for the successful ZnO NPs synthesis and could be used for controlling mosquito vector Ae. aegypti.
Travelling and rotating solutions to the generalized inviscid surface quasi-geostrophic equation
Authors: Ao Weiwei , Dávila Juan , del Pino Manuel , Musso Monica , Wei Juncheng 
Published: March 2021

For the generalized surface quasi-geostrophic equation

{

a
m
p
;

∂
t

θ
+
u
⋅
∇
θ
=
0
,

in

R

2

×
(
0
,
T
)
,

a
m
p
;
u
=

∇
⊥

ψ
,

ψ
=
(
−
Δ

)

−
s

θ

in

R

2

×
(
0
,
T
)
,

\begin{equation*} \left \{ \begin {aligned} & \partial _t \theta +u\cdot \nabla \theta =0, \quad \text {in } \mathbb {R}^2 \times (0,T), \\ & u=\nabla ^\perp \psi , \quad \psi = (-\Delta )^{-s}\theta \quad \text {in } \mathbb {R}^2 \times (0,T) , \end{aligned} \right . \end{equation*}

0
>
s
>
1

0>s>1

, we consider for

k
≥
1

k\ge 1

the problem of finding a family of

k
k

-vortex solutions

θ
ε

(
x
,
t
)

\theta _\varepsilon (x,t)

such that as

ε
→
0

\varepsilon \to 0

θ
ε

(
x
,
t
)
⇀

∑

j
=
1

k

m
j

δ
(
x
−

ξ
j

(
t
)
)

\begin{equation*} \theta _\varepsilon (x,t) \rightharpoonup \sum _{j=1}^k m_j\delta (x-\xi _j(t)) \end{equation*}

for suitable trajectories for the vortices

x
=

ξ
j

(
t
)

x=\xi _j(t)

. We find such solutions in the special cases of vortices travelling with constant speed along one axis or rotating with same speed around the origin. In those cases the problem is reduced to a fractional elliptic equation which is treated with singular perturbation methods. A key element in our construction is a proof of the non-degeneracy of the radial ground state for the so-called fractional plasma problem

(
−
Δ

)
s

W
=
(
W
−
1

)
+
γ

,

in

R

2

,

1
>
γ
>

1
+
s

1
−
s

\begin{equation*} (-\Delta )^sW = (W-1)^\gamma _+ , \quad \text {in } \mathbb {R}^2, \quad 1>\gamma > \frac {1+s}{1-s} \end{equation*}

whose existence and uniqueness have recently been proven in Chan, del Mar González, Huang, Mainini, and Volzone [Calc. Var. Partial Differential Equations 59 (2020), p. 42].
Application of CRISPR screens to investigate mammalian cell competition
Authors: Paraskevopoulos Michail , McGuigan Alison P 
Published: March 2021

AbstractCell competition is defined as the context-dependent elimination of cells that is mediated by intercellular communication, such as paracrine or contact-dependent cell signaling, and/or mechanical stresses. It is considered to be a quality control mechanism that facilitates the removal of suboptimal cells from both adult and embryonic tissues. Cell competition, however, can also be hijacked by transformed cells to acquire a ‘super-competitor’ status and outcompete the normal epithelium to establish a precancerous field. To date, many genetic drivers of cell competition have been identified predominately through studies in Drosophila. Especially during the last couple of years, ethylmethanesulfonate-based genetic screens have been instrumental to our understanding of the molecular regulators behind some of the most common competition mechanisms in Drosophila, namely competition due to impaired ribosomal function (or anabolism) and mechanical sensitivity. Despite recent findings in Drosophila and in mammalian models of cell competition, the drivers of mammalian cell competition remain largely elusive. Since the discovery of CRISPR/Cas9, its use in functional genomics has been indispensable to uncover novel cancer vulnerabilities. We envision that CRISPR/Cas9 screens will enable systematic, genome-scale probing of mammalian cell competition to discover novel mutations that not only trigger cell competition but also identify novel molecular components that are essential for the recognition and elimination of less fit cells. In this review, we summarize recent contributions that further our understanding of the molecular mechanisms of cell competition by genetic screening in Drosophila, and provide our perspective on how similar and novel screening strategies made possible by whole-genome CRISPR/Cas9 screening can advance our understanding of mammalian cell competition in the future.
Integrative transcription start site identification with iTiSS
Authors: Jürges Christopher S , Dölken Lars , Erhard Florian 
Published: March 2021

Abstract

Summary
Many experimental approaches have been developed to identify transcription start sites (TSS) from genomic scale data. However, experiment specific biases lead to large numbers of false-positive calls. Here, we present our integrative approach iTiSS, which is an accurate and generic TSS caller for any TSS profiling experiment in eukaryotes, and substantially reduces the number of false positives by a joint analysis of several complementary datasets.

Availability and implementation
iTiSS is platform independent and implemented in Java (v1.8) and is freely available at https://www.erhard-lab.de/software and https://github.com/erhard-lab/iTiSS.

Supplementary information
Supplementary data are available at Bioinformatics online.
Case-Control Study of Individuals with Discrepant Nucleocapsid and Spike Protein SARS-CoV-2 IgG Results
Authors: Wang Hannah , Wiredja Danica , Yang Lu , Bulterys Philip L , Costales Cristina , Röltgen Katharina , Manalac Justin , Yee Jennifer , Zehnder James , Shi Run Zhang , Boyd Scott D , Pinsky Benjamin A 
Published: March 2021

Abstract

Background
Laboratory-based methods for SARS-CoV-2 antibody detection vary widely in performance. However, there are limited prospectively-collected data on assay performance, and minimal clinical information to guide interpretation of discrepant results.

Methods
Over a 2-week period, 1080 consecutive plasma samples submitted for clinical SARS-CoV-2 IgG testing were tested in parallel for anti-nucleocapsid IgG (anti-N, Abbott) and anti-spike IgG (anti-S1, EUROIMMUN). Chart review was conducted for samples testing positive or borderline on either assay, and for an age/sex-matched cohort of samples negative by both assays. CDC surveillance case definitions were used to determine clinical sensitivity/specificity and conduct receiver operating characteristics curve analysis.

Results
There were 52 samples positive by both methods, 2 positive for anti-N only, 34 positive for anti-S1 only, and 27 borderline for anti-S1. Of the 34 individuals positive for anti-S1 alone, 8 (24%) had confirmed COVID-19. No anti-S1 borderline cases were positive for anti-N or had confirmed/probable COVID-19. The anti-N assay was less sensitive (84.2% [95% CI 72.1-92.5%] vs 94.7% [95% CI 85.4-98.9%]) but more specific (99.2% [95% CI 95.5-100%] vs 86.9% [95% CI 79.6-92.3%]) than anti-S1. Abbott anti-N sensitivity could be improved to 96.5% with minimal effect on specificity if the index threshold was lowered from 1.4 to 0.6.

Conclusion
Real-world concordance between different serologic assays may be lower than previously described in retrospective studies. These findings have implications for the interpretation of SARS-CoV-2 IgG results, especially with the advent of spike antigen-targeted vaccination, as a subset of patients with true infection are anti-N negative and anti-S1 positive.
Deep Neural Network for Disease Detection in Rice Plant Using the Texture and Deep Features
Authors: Daniya T , Vigneshwari S 
Published: March 2021

Abstract
The diseases in plants pose a devastating impact on initiating safety in the production of food and they can lead to a reduction in the quantity and quality of agricultural products. In most cases, plant diseases lead to no grain harvest. Thus, an automatic diagnosis of plant disease is highly recommended for determining agricultural information. Several techniques are devised for plant disease detection wherein deep learning is preferred due to its effective performance. Novel deep learning is presented to spot disease from rice crop images. Here, the rice plant image undergoes pre-processing to remove noise and artifacts contained in the image. Then, the segmentation is performed with Segmentation Network (SegNet) to produce segments. The segments are further adapted for extracting statistical features, convolution neural network (CNN) features and texture features. These features are employed for plant disease detection wherein the deep recurrent neural network (Deep RNN) is utilized. The Deep RNN is trained with the proposed RideSpider Water Wave (RSW) algorithm. The proposed RSW is devised by integrating RWW in Spider monkey optimization. The proposed RWS-based Deep RNN provides superior performance with the highest accuracy of 90.5%, maximal sensitivity of 84.9% and maximal specificity of 95.2%.