bluuebunny/crossref_metadata_2025 huggingface dataset:
Suiziddrohungen bei Entlassung aus stationär-psychiatrischer Behandlung
Authors: Koban Christoph , Teismann Tobias
Published: March 2024

Suiziddrohungen vor einer geplanten Entlassung stellen Behandler im stationären Setting vor erhebliche Schwierigkeiten; insbesondere, da sich nicht sicher differenzieren lässt zwischen sogenannten Suizidgesten und genuiner Suizidalität. Es empfiehlt sich, frühzeitig während eines stationären Aufenthalts suizidales Erleben und Verhalten explizit zum Thema zu machen. Die therapeutische Auseinandersetzung sollte dabei auf einem fundierten Fallkonzept aufbauen und muss die motivationale Ausgangslage von Patienten berücksichtigen. Motivations- und beziehungsfördernde Therapiestrategien sind veränderungsorientierten Therapieinterventionen dabei immer voranzustellen. Strukturierte Therapieprogramme während und nach dem stationären Aufenthalt können für die weitergehende Aufarbeitung genutzt werden.
Classification of Male Athletes Based on Critical
Power
Authors: Olaya-Cuartero Javier , Pueo Basilio , Penichet-Tomas Alfonso , Jimenez-Olmedo Jose M.
Published: March 2024

This study aimed to classify male athletes based on their performance levels
derived from running critical power (CP) using the 9/3-minute Stryd CP test,
enabling customized training strategies and goal setting. Twenty-four trained
athletes underwent the 9/3-minute running CP test on a certified 400-m athletics
track. Hierarchical cluster analysis using Ward's method categorized
athletes based on CP into distinct performance tiers. Three clusters were
identified with centroids of 3.87±0.12, 4.45±0.17, and 5.14±0.29 W/kg. Five
performance tiers were defined through ordinary least square linear regression
based on power (W/kg): Tier 1: Fair (2.9 to 3.6 W/kg), Tier 2: Tourist (3.6 to
4.2 W/kg), Tier 3: Regional (4.2 to 4.8 W/kg), Tier 4: National (4.8 to
5.5 W/kg), Tier 5: International (5.5 to 6.1 W/kg). Low semi-partial R-squared
(SpR
2) values (0.02 to 0.05) indicated minimal homogeneity
loss when merging clusters. R-squared (R
2) explained 89% to
96% of CP variance, emphasizing cluster analysis effectiveness. The linear
regression model demonstrated a strong fit (r
2+=+0.997) with a
significant intercept (3.22 W/kg), slope (0.63 W/kg/tier), and a low standard
error of estimate (0.045 W/kg). This classification offers insights into male
athlete performance levels based on CP, facilitating targeted training programs
for varying performance levels.
The Pathophysiological Associations Between Obesity, NAFLD, and
Atherosclerotic Cardiovascular Diseases
Authors: Li Meng , Cui Man , Li Guoxia , Liu Yueqiu , Xu Yunsheng , Eftekhar Seyed Parsa , Ala Moein
Published: March 2024

Obesity, non-alcoholic fatty liver disease (NAFLD), and atherosclerotic
cardiovascular diseases are common and growing public health concerns. Previous
epidemiological studies unfolded the robust correlation between obesity, NAFLD,
and atherosclerotic cardiovascular diseases. Obesity is a well-known risk factor
for NAFLD, and both of them can markedly increase the odds of atherosclerotic
cardiovascular diseases. On the other hand, significant weight loss achieved by
lifestyle modification, bariatric surgery, or medications, such as semaglutide,
can concomitantly improve NAFLD and atherosclerotic cardiovascular diseases.
Therefore, certain pathophysiological links are involved in the development of
NAFLD in obesity, and atherosclerotic cardiovascular diseases in obesity and
NAFLD. Moreover, recent studies indicated that simultaneously targeting several
mechanisms by tirzepatide and retatrutide leads to greater weight loss and
markedly improves the complications of metabolic syndrome. These findings remind
the importance of a mechanistic viewpoint for breaking the association between
obesity, NAFLD, and atherosclerotic cardiovascular diseases. In this review
article, we mainly focus on shared pathophysiological mechanisms, including
insulin resistance, dyslipidemia, GLP1 signaling, inflammation, oxidative
stress, mitochondrial dysfunction, gut dysbiosis, renin-angiotensin-aldosterone
system (RAAS) overactivity, and endothelial dysfunction. Most of these
pathophysiological alterations are primarily initiated by obesity. The
development of NAFLD further exacerbates these molecular and cellular
alterations, leading to atherosclerotic cardiovascular disease development or
progression as the final manifestation of molecular perturbation. A better
insight into these mechanisms makes it feasible to develop new multi-target
approaches to simultaneously unhinge the deleterious chain of events linking
obesity and NAFLD to atherosclerotic cardiovascular diseases.
Synthesis of Three-Dimensional Benzophenone Analogues Based on a [2.2]Paracyclophane Scaffold
Authors: Benedetti Erica , Wu Shiqi , Micouin Laurent
Published: March 2024

Herein, we report the synthesis of functionalized three-dimensional benzophenone analogues derived from [2.2]paracyclophane (pCp). The potential use of these compounds as photocatalysts is disclosed. Benzophenone and its derivatives are well-known photoactive compounds that have been extensively employed over the years as catalysts to promote a variety of transformations activated by light. The development of differently substituted three-dimensional versions of such compounds may significantly expand the range of their applications in photocatalysis. Exploitation of the planar chirality of substituted paracyclophanes may also lead to significant innovations in different fields. [2.2]Paracyclophane-based benzophenone derivatives incorporating reactive ester or amide functions at their pseudo-gem position are successfully prepared in a selective manner. Examples of both racemic and enantiopure compounds are reported. As a proof of concept, the catalytic activities of the newly synthesized molecules are compared to that of benzophenone in a known photooxidation reaction.
Stereoselective Reduction of Conjugated and Non-conjugated Triple Bonds in Attractant Precursors with Zn Activated by Cu: A Designed Approach to the Synthesis of Conjugated Dienic Pheromones
Authors: Grodner Jacek
Published: March 2024

A simple, highly stereoselective, and efficient method to obtain important attractants by the reduction of the triple bond in several E-enynes and hex-3-ynyl acetate by an activated Zn-Cu system is described. The stereoselectivity of the semireduction for the generation of a new (Z)-C=C bond was >98%. The substrates for the reduction reaction were obtained by new synthetic routes with an overall yield of more than 40%.
Remineralizing Potential of Bioactive Glass–Ceramic over White Spot Lesions
Authors: Silva Stéphanie O , Soares Eduardo J. , Amorim Ayodele A. , Geng Vivanco Rocio , Pires-de-Souza Fernanda C.P.
Published: March 2024

Objective This study evaluated the effect of incorporating biosilicate (Bio) particles into experimental toothpaste (ET) on their abrasiveness and remineralization capacity for white spot lesions (WSLs).

Materials and Methods Thirty-two fragments of bovine teeth (6 × 6 × 2 mm) were obtained. Initial microhardness (Knoop hardness number [KHN], HMV Microhardness Meter, Shimadzu) and surface roughness (Rugosimeter Surfcorder SE 1700) readouts were performed. Fragments were submitted to a cariogenic challenge to simulate WSLs and then divided into four groups: Control, conventional toothpaste (Colgate Smiles, Colgate-Palmolive Company); ETF, ET with fluoride (carboxymethylcellulose + glycerol + thickening silica + fluoride); ETB, ET with Bio; BS, biosuspension (10 in weight% Bio). Toothpaste treatments were performed through simulated toothbrushing (Pepsodent, MAVTEC, 14,600 cycles). BS was applied by immersion for 8 hours followed by 16 hours in artificial saliva at 37°C for 60 days, totalizing 1,440 cycles. After treatments, final KHN and surface roughness readings were performed, and scanning electron microcopy (SEM) was conducted (Jeol JSM-6610LV) for morphological analysis. Data were analyzed with one-way analysis of variance, Tukey's test (p < 0.05).

Results BS produced the least surface roughness change, different (p < 0.05) from all the other groups. ETB caused higher KHN than ETF (p < 0.05). SEM images revealed that ETB and BS resulted in abraded surfaces with deposition of particles.

Conclusion ETB resulted in similar abrasiveness to the control group, and it caused higher microhardness than the ETF.

Practical Implication Considering its higher KHN, ETB could be considered a proper alternative for the treatment of WSLs.
Mainstreaming social sciences expertise in UK environment policy and practice organisations: retrospect and prospect
Authors: Morris Carol , Brockett Beth F. T. , Selwood Sara , Carr Victoria , Hall Jilly , Hughes Joelene , Ambrose-Oji Bianca
Published: March 2024

Building upon the concept of mainstreaming social sciences within conservation, we consider their mainstreaming, and so integration, within UK environment policy and practice (EPP) organisations. The paper responds to increasing calls to recognise the essential role of social sciences in addressing global environmental crises across policy, practice and research. An actor-oriented approach was deployed, producing empirical information from a multi-stage, co-designed, collaborative study involving 19 social scientists from a range of EPP organisations, to understand how they experience the mainstreaming of social sciences. The findings contribute to debates about the politics of knowledge in organisational domains other than those focused on research, specifically EPP organisations. Evidence was found of recent positive changes in how social sciences are perceived, resourced and utilised within EPP, as well as examples of positive impact. However, although EPP organisations are recognising the opportunities that social sciences expertise brings, in practice social sciences still face barriers to effective integration. Many of the challenges faced by the social sciences within academic multi-discipline research (e.g., late, narrow, or selective enrolment) were also experienced in EPP organisations, along with some unique challenges. Informed by the findings, the paper proposes a set of integration indicators designed to assess organisational progress toward addressing the observed challenges. It is recommended that these indicators are employed at a strategic level by EPP organisations seeking to better integrate social sciences expertise into their work.
Analysing how government-provided vocational skills training affects migrant workers’ income: A study based on the Livelihood Capital Theory
Authors: Li Fang , Liu Danchen , Gao Ping , Shao Haiying , Shen Suyan
Published: March 2024

This study explores the internal logic and influence mechanism of government-provided vocational skills training (GPVST) and migrant workers’ income level (IL) and income satisfaction (IS) using propensity score matching with difference-in-differences (PSM–DID), and it utilizes panel data collected by China Labor-force Dynamic Survey (CLDS) in 2016 and 2018. The study indicates that participation in GPVST positively affects the IL and IS of migrant workers; further analysis reveals that GPVST is more capable of raising the foreign migrant workers’ IL, and that the positive effect on the IS pertaining to the older generation of migrant workers and local migrant workers is more significant. Mechanism analysis reveals that GPVST can indirectly enhance the IL and IS of migrant workers by increasing the skill-enhancing effect exerted by human capital, information-interaction effect exerted by social capital, and trickle-down effect exerted by financial capital; however, generally, the indirect effect of livelihood capital is stronger in the impact of GPVST on the IL, whereas the direct effect is stronger in the impact of GPVST on IS. The findings herein exhibit crucial practical value for strengthening GPVST and enhancing the livelihood capital and income of migrant workers.
Charting sustainable logistics on the 21st-Century Maritime Silk Road: a DEA-based approach enhanced by risk considerations through prospect theory
Authors: Wang Chia-Nan , Nhieu Nhat-Luong , Chen Chun-Ming
Published: March 2024

This study investigates the sustainable logistics potential of countries along the Maritime Silk Road (MSR), an essential element of the Belt and Road Initiative (BRI), against a backdrop of increasing global emphasis on sustainability and efficient trade practices. Addressing the gap in existing literature, it explores how strategic positioning influences countries’ logistics capabilities, integrating risk considerations and behavioral decision-making aspects into the assessment. Through a specialized Data Envelopment Analysis (DEA) model that incorporates Prospect Theory, this research provides a nuanced evaluation of economic performance, energy efficiency, infrastructure robustness, governance quality, and innovation capabilities. The analysis reveals significant findings, such as Vietnam’s outstanding economic efficiency, Indonesia’s notable achievements in sustainability and governance, and Malaysia’s balanced efficiency, which collectively enhance the MSR’s logistics framework. Additionally, India, Greece, Djibouti, and Kenya emerge as vital partners due to their diverse strengths. The introduction of a risk-aware DEA model, enriched with behavioral factors, marks a significant advancement in logistics assessment methodologies, offering a more comprehensive understanding of sustainable logistics practices along the MSR. The implications of this study are profound, providing valuable insights for policymakers, investors, and business leaders. It guides strategic decision-making, promoting sustainability in MSR trade activities while aligning with global eco-conscious practices and economic growth within the context of environmental stewardship and sustainable development. However, the research acknowledges limitations related to the indirect measurement of decision-makers’ psychological behavioral coefficients and the focus on efficiency metrics without extensive exploration of cultural, political, or legal factors. This work sets a new precedent in sustainable logistics research, encouraging future studies to incorporate direct behavioral data and qualitative factors for a more enriched evaluation. Its innovative approach not only contributes to the academic discourse on sustainable logistics but also offers practical tools for enhancing the MSR’s trade efficiency and sustainability.
Mesoscale model for computational simulation of reaction driven by dielectric breakdown in metal-polymer propellants
Authors: Shin Ju Hwan (Jay) , Zhou Min
Published: March 2024

The reactivity of heterogeneous energetic materials (HEMs) intimately depends on the underlying microstructural effects. For reactive materials, key factors include the microstructure distribution, morphology, size scale of heterogeneities, reactant mixing, and chemical kinetics of the reactants. We report the development of a mesoscale model for simulating the evolutions of the hotspot field and associated reaction processes when such materials are exposed to external excitations. The model explicitly accounts for microstructure, interdiffusion between the reactant species, advection of the species mixture, and chemical kinetics of the reaction. An Arrhenius relation is used to capture the rate of reactive heat release. The particular material analyzed is a composite of poly(vinylidene fluoride-co-trifluoroethylene) and nanoaluminum [or P(VDF-TrFE)/nAl]. The excitation leading to the initial microstructural temperature increase that kicks off the exothermic reactive processes is the dissipative heating arising from dielectric breakdown under the electric field developed through piezoelectricity and flexoelectricity of P(VDF-TrFE). As such, the model resolves both the breakdown process and the diffusion, advection, and exothermic reaction processes. The evolutions of the temperature and species distribution fields under the combined effects of breakdown and chemistry are used to predict the effects of microstructure, diffusion, and kinetics on several key metrics characterizing the reactive responses of the material. This mesoscale framework admits the quantification of uncertainties in these predicted macroscopic behavior measures due to microstructure heterogeneity fluctuations through the use of multiple, random but statistically equivalent microstructure instantiations. Although the particular hotspot inducing mechanism considered is dielectric breakdown here, the framework can be adapted to analyze reaction initiation and propagation and establish microstructure–reaction behavior relations under other types of hotspot inducing mechanisms, such as thermomechanical inelastic dissipation, frictional heating, and laser or microwave excitation.
An intelligent insole based on wide-range flexible pressure sensor
Authors: Qian Xilin , Tian Bowen , Zhang Jiaqi , Fan Ziyang , Ren Yitao , Pan Yifei , Guo Chengxi , Wang Chentao , Kong Lijie , Yu Huiyang , Huang Jianqiu
Published: March 2024

In this paper, an intelligent insole that contains five wide-range flexible capacitive pressure sensors is developed. The output signal of these five sensors is collected and processed by a portable microprocessor system, which is then transmitted to a cloud platform via a Wi-Fi module. The ensuing data visualization is constructed with a WeChat mini-program. The wide-range flexibility is achieved by employing composition materials with a high pressure-sensitive effect. A novel approach is proposed to fabricate flexible pressure-sensitive dielectrics, thereby significantly enhancing the sensitivity and detection range of pressure sensors. The fabrication process involves utilizing polydimethylsiloxane (PDMS) as a flexible substrate, incorporating nano-iron powder and polyvinylidene fluoride as sensitizing materials, and applying an external magnetic field to control the distribution of iron nanoparticles during the curing process of PDMS. Furthermore, a motion detection system tailored for these flexible sensors is developed. By integrating sensor networks with Internet of things technology, the application potential of wide-range flexible pressure sensors in kinematics and medical rehabilitation fields can be effectively realized.
Self- and other-reference in social contexts
Authors: Palander-Collin Minna , Nevala Minna
Published: March 2024

This introductory chapter sets the scene for the contributions to this volume which are all focused on the
analysis of self- and other-reference in social contexts. In this chapter, we provide an overview of previous approaches to
reference and context, offering a foundation on which the following studies will build. The focus is on the study of self- and
other-reference that is constructed or represented in various social contexts through specific markers, such as personal
pronouns, or other referential expressions. This chapter also provides an introduction to the theoretical and methodological
approaches of the chapters.
Personal conviction against general knowledge
Authors: Biri Ylva
Published: March 2024

This study analyses the functions of I know and we know in online
discussions of climate change. These phrases locate the writer through the first-person pronouns and indicate epistemic
certainty through the private verb know. The constructions are analysed in a corpus of climate change-related
posts on the social media sites Twitter (currently X) and Reddit. As the writers discuss and argue for or against climate
change being an environmental threat, I know and we know mark the writer’s subjective
evaluation and how they position themselves with a like-minded audience: I know has interpersonal functions
and we know is used to emphasise certainty by attributing knowledge to a larger epistemic community. This
construction of knowledge situates the writer in the broader ideological climate debate.
The European Union as an in-group in British press and parliamentary debates
Authors: Räikkönen Jenni
Published: March 2024

This chapter focuses on the representation of the European Union as an in-group in British parliamentary
debates and newspaper articles in 1974–2015. The focus is on contexts in which the EU is referred to by the first-person
plural pronoun we or us. Employing the methods of corpus-assisted discourse studies, the
chapter will give a diachronic view of how the EU has been represented in British broadsheets and tabloids as well as in
Labour and Conservative MPs’ speeches. Comparisons are also made between left-wing and right-wing discourses. The results
suggest that (1) the EU is rarely included in the in-group, but (2) when it is, it is commonly evaluated positively or at
least neutrally, but also criticized.
Intragroup marginalization in social media
Authors: Limatius Hanna , Nevala Minna
Published: March 2024

This chapter discusses plus-size group membership in Instagram (IG) posts published by the fashion retailer
Fashion Nova Curve. Moreover, we focus on the ways in which self- and other-reference are used as tools for Intragroup
Marginalization (IM). By IM we mean distancing by group members that occurs when a certain individual is believed to exhibit
behaviors, values and beliefs that are outside the in-group culture’s norms. Our data consist of 233 Instagram posts published
in October 2021, and our critical discourse analysis focuses on those person referential terms that show in-group membership
polarization. Our results show that both the models and the customers in the IG posts are marginalized by the commenters in
several ways, including critical comments not only from the out-group, but also from the members of the plus-size in-group, as
their bodies are constructed as e.g. ‘not plus-size enough’ or ‘the wrong kind of plus-size’.
The communicative functions of third-person singular pronouns
Authors: Hekanaho Laura
Published: March 2024

This chapter examines the communicative functions of third-person singular pronouns (3PSPs) in the context
of self- and other-references. The focus is on transgender contexts, in which 3PSPs have acquired many new functions and
associations, such as sharing one’s pronouns upon introduction as a novel way of utilizing 3PSPs in self-reference.
Other-references have also gained new context-dependent meanings, e.g. using the wrong pronouns can function as misgendering.
Drawing from a thematic analysis of qualitative survey data, the chapter demonstrates how differently cisgender and
transgender individuals conceptualize pronouns in relation to one’s identity. Connecting the findings to the broader identity
framework by Bucholtz and Hall (2010), the chapter discusses the communicative
functions of 3PSPs and the ways in which identities are constructed with pronouns.
Positioning the self and other in English lingua franca interactions
Authors: Beuter Katharina
Published: March 2024

This chapter explores the dynamics of identification in a German–​Tanzanian school exchange, in which
participants use English as a lingua franca (ELF). It investigates which particular reference systems adolescents activate for
positioning themselves and their interlocutors in this context, and how orientations change in the course of their encounter.
In a mixed-methods approach combining quantitative corpus investigations with content analyses, the contribution focuses on
the contextual use of pronouns and the discursive construction of categories of belonging in authentic ELF interactions, but
also draws on information from background questionnaires and interview data collected in the framework of the student
exchange. The study thus contributes a speaker-informed picture of reference systems at play in the co-construction of
identities through intercultural interactions in ELF.
Design and tribological performance of graphene nanofluids dispersed by dragging effect of bicomponent gelator
Authors: Zhang Ruochong , Ding Zhuoli , Zhang Haojie , Xia Yu , Wang Minghuan , Hu Xiaodong , Xu Xuefeng , Zhang Yongzhen
Published: March 2024

Nanofluids have excellent lubrication and high thermal conductivity. However, the agglomeration and sedimentation produced by the large surface energy of nanoparticles in base liquid threaten the long-term dispersion stability and impact the wide application of nanofluid. In this work, based on the self-assemble behavior and continuous network structure formed by low molecular weight organic gelator, the uniform clusters were formed through regulating the kinetics behavior in the gelling process. The dragging effect was demonstrated by oleic acid - sodium dodecyl sulfate (OA-SDS) bicomponent gelator and graphene oxide (GO) nanosheets. The results showed that GO nanofluids dispersed by OA-SDS were stable for more than 12 months. The well-dispersed GO nanofluid exhibited better anti-friction and anti-wear properties under both immersion and electrostatic minimum quantity lubrication conditions. Moreover, the lower contact angle, surface tension and droplet size of nanofluids after charging improved the wettability on the frictional interface. The GO adsorption film formed on the friction interface protected the tribochemical reaction film of iron oxide and prevented the occurrence of sintering of base oil.
Formation-free resistive switching in nanocrystalline tellurium oxide
Authors: Keerthana  , Venimadhav Adyam
Published: March 2024

In this work, we report on the observation of resistive switching (RS) in the nanocrystalline tellurium oxide (TeO
x
) in ITO/TeO
x
/Ag device configuration. The TeO
x
films grown in an O2/Ar environment have dominant β-TeO2 along with other polymorphs and amorphous TeO2. From the RS characteristics, it is suggestive that the β-TeO2 phase promotes the conductive filament formation across the highly insulating amorphous matrix. The memory device demonstrates bipolar RS with excellent endurance, retention and on–off ratio. The device also features formation-free switching with low set and reset voltage (0.6 V and −0.8 V respectively) and displays multilevel switching upon varying compliance current. Current-Voltage characterization clarifies the conduction path is indeed filamentary type. The result highlights that TeO
x
can be a prominent RS material for memory and brain-inspired computing devices.
Analysis of the optimal target node to reduce seizure-like discharge in networks
Authors: Yan 闫 Luyao 璐瑶 , Zhang 张 Honghui 红慧 , Sun 孙 Zhongkui 中奎
Published: March 2024

Network approaches have been widely accepted to guide surgical strategy and predict outcome for epilepsy treatment. This study starts with a single oscillator to explore brain activity, using a phenomenological model capable of describing healthy and epileptic states. The ictal number of seizures decreases or remains unchanged with increasing the speed of oscillator excitability and in each seizure, there is an increasing tendency for ictal duration with respect to the speed. The underlying reason is that the strong excitability speed is conducive to reduce transition behaviors between two attractor basins. Moreover, the selection of the optimal removal node is estimated by an indicator proposed in this study. Results show that when the indicator is less than the threshold, removing the driving node is more possible to reduce seizures significantly, while the indicator exceeds the threshold, the epileptic node could be the removal one. Furthermore, the driving node is such a potential target that stimulating it is obviously effective in suppressing seizure-like activity compared to other nodes, and the propensity of seizures can be reduced 60% with the increased stimulus strength. Our results could provide new therapeutic ideas for epilepsy surgery and neuromodulation.
Optical trapping capability of tornado circular Pearcey beams
Authors: Liu 刘 Na-Na 娜娜 , Tang 唐 Xiao-Ying 晓莹 , Liu 刘 Shun-Yu 舜禹 , Liang 梁 Yi 毅
Published: March 2024

We systemically investigate optical trapping capability of a kind of tornado waves on Rayleigh particles. Such tornado waves are named as tornado circular Pearcey beams (TCPBs) and produced by combining two circular Pearcey beams with different radii. Our theoretical exploration delves into various aspects, including the propagation dynamics, energy flux, orbital angular momentum, trapping force, and torque characteristics of TCPBs. The results reveal that the orbital angular momentum, trapping force, and torque of these beams can be finely tuned through the judicious manipulation of their topological charges (l
1 and l
2). Notably, we observe a precise control mechanism wherein the force diminishes with |l
1 + l
2| and |l
1–l
2|, while the torque exhibits enhancement by decreasing solely with |l
1 + l
2| or increasing with |l
1–l
2|. These results not only provide quantitative insights into the optical trapping performance of TCPBs but also serve as a valuable reference for the ongoing development of innovative photonic tools.
Entropy of deterministic trajectory via trajectories ensemble
Authors: Peng 彭 Yonggang 勇刚 , Ran 冉 Cuiping 翠平 , Zheng 郑 Yujun 雨军
Published: March 2024

We present a formulation of the single-trajectory entropy using the trajectories ensemble. The single-trajectory entropy is affected by its surrounding trajectories via the distribution function. The single-trajectory entropies are studied in two typical potentials, i.e., harmonic potential and double-well potential, and in viscous environment by interacting trajectory method. The results of the trajectory methods are in agreement well with the numerical methods (Monte Carlo simulation and difference equation). The single-trajectory entropies increasing (decreasing) could be caused by absorption (emission) heat from (to) the thermal environment. Also, some interesting trajectories, which correspond to the rare evens in the processes, are demonstrated.
Optimal preparation of Bose and Fermi atomic gas mixtures of 87Rb and 40K in a crossed optical dipole trap
Authors: Ding 丁 Peibo 培波 , Shan 单 Biao 标 , Zhao 赵 Yuhang 宇航 , Yang 杨 Yajing 雅婧 , Chen 陈 Liangchao 良超 , Meng 孟 Zengming 增明 , Wang 王 Pengjun 鹏军 , Huang 黄 Lianghui 良辉
Published: March 2024

We report on the optimal production of the Bose and Fermi mixtures with 87Rb and 40K in a crossed optical dipole trap (ODT). We measure the atomic number and lifetime of the mixtures in combination of the spin state |F = 9/2, m
F = 9/2〉 of 40K and |1, 1〉 of 87Rb in the ODT, which is larger and longer compared with the combination of the spin state |9/2, 9/2〉 of 40K and |2, 2〉 of 87Rb in the ODT. We observe the atomic numbers of 87Rb and 40K shown in each stage of the sympathetic cooling process while gradually reducing the depth of the optical trap. By optimizing the relative loading time of atomic mixtures in the MOT, we obtain the large atomic number of 40K (∼6 × 106) or the mixtures of atoms with an equal number (∼1.6 × 106) at the end of evaporative cooling in the ODT. We experimentally investigate the evaporative cooling in an enlarged volume of the ODT via adding a third laser beam to the crossed ODT and found that more atoms (8 × 106) and higher degeneracy (T/T
F = 0.25) of Fermi gases are obtained. The ultracold atomic gas mixtures pave the way to explore phenomena such as few-body collisions and the Bose–Fermi Hubbard model, as well as for creating ground-state molecules of 87Rb40K.
Research on the Law of Affecting the Quality of forging Metallurgy Quality on the Quality of Wedge Horizontal Rolling Mold
Authors: Huang Shuai , Fang Shuang , Chen Yaqin , Lin Yingying
Published: March 2024

Drawing on the traditional and mature cross wedge rolling forming technology for stepped shaft parts, it is innovatively applied to the high-efficiency and low-cost manufacturing of blade preforms with special-shaped sections. Under the action of the rollers, the material undergoes radial compression deformation and axial extension deformation, and the blank changes from a uniform cross-section to a variable cross-section, which is in the shape of a stepped shaft. Forming, to prepare a blade preform with deformed cross-section characteristics. Then, the cooled blade preform is heated again and placed in a precision forging die. Under the action of the unidirectional compressive stress of the upper and lower dies, the blade preform is compressed and deformed, filling the die cavity with the smallest volume, thereby realizing precision forming of blade forgings. In the process parameters of the horizontal wedge rolling mold, the effect of forming angle has the greatest impact on center damage.
Electrothermal Coupling Modeling and Electrothermal Dynamic Characteristics of Nickel-Cadmium Battery
Authors: Zhang Yin , Wu Hao , Wang Shuangquan , Liao Haitao , Dai Chaohua
Published: March 2024

Although Nickel-Cadmium batteries are widely used, there is a general problem of thermal failure and even thermal safety, and a lack of thermal characteristics and temperature rise law research. Accordingly, a typical Nickel-Cadmium battery’s equivalent circuit model, thermal model, and electrothermal coupling model were established in this article. The model’s open-circuit voltage, resistance, and capacitance, as well as its entropy heat coefficient, thermal conductivity and heat transfer coefficient were measured, and finally, according to these parameters, the verification analysis of the electrothermal coupling model was carried out in Simulink under the HPPC working condition and constant current working condition. The results show that the simulation results are basically consistent with the experimental data, the absolute value of voltage error is less than 0.02V under HPPC condition, the maximum voltage error is only 0.7% under constant current condition, and the temperature maximum error is only 3%. Consequently, the constructed electrothermal coupling model can well reflect the electrothermal characteristics of the battery, which provides data support and reference for solving the thermal failure problem.
Optimization Design of Insulation Materials and Thickness Based on Box Insulation Performance
Authors: Qin Zhenming , Sun Youli , Li Junyan , Guo Bin , Zhou Ning
Published: March 2024

To ensure that the air inside the box does not fall below -20 °C after cooling for four hours, With the help of CFD numerical simulation technology, the composition materials and thickness have been optimized and designed in this paper. In this paper, there are two kinds of materials for box wall panel, one is insulation material 1 with smaller specific heat capacity and steel, the other is insulation material 2 with larger specific heat capacity. The simulation analysis results of two types of box wall panels show that the air temperature at edges and corners is difficult to meet the requirements. By using local thickening, this situation can be greatly improved.
Design of an Intelligent Feeding System
Authors: Huang Guiyun , Chen Ying , Li Yong , Cui Jian
Published: March 2024

The article elaborates on the design method of an intelligent feeding system . The feeding system is an important part of the automatic production line, which provides raw materials for other units of the automatic production line. It is controlled by PLC, which is described from many aspects, such as structure design, pneumatic circuit design, control circuit design and PLC program design. It analyzes the design idea and principle of intelligent feeding system in detail, and provides an effective reference for the design of automatic production line.
Phase Composition and Analysis of Surface Micromorphology of Animal Medicine Concha Arcae and Calcined Concha Arcae
Authors: Wu Zhifu , Liang Liuchan , Hu Liyun
Published: March 2024

The components of concha arcae and calcined concha arcae were analyzed by X-ray powder diffraction and calculated their contents, and their surface morphology was observed by scanning electron microscope. The experimental results showed that the concha arcae was composed of aragonite type and calcite type calcium carbonate, and calcined concha arcae was composed of calcium oxide, calcium hydroxide and calcium carbonate. The surface micromorphology of them were significantly different. Rietveld refinement can accurately and quickly complete the phase identification and quantitative analysis of raw and calcined products of concha arcae by Powder X-ray diffraction, it is more convenient and fast compared with chemical titration method.
Research Progress in the Treatment of High-Salinity Wastewater
Authors: Zhang Luyao , Zhu Xiaolei , Wang Haonan , Liu Xiaojie
Published: March 2024

The generation of high-salinity wastewater is closely associated with various industries, containing a plethora of dissolved salts such as chlorides, sulfates, and carbonates, which pose a significant threat to the environment and human health. Consequently, the treatment of high-salinity wastewater has emerged as a pivotal environmental challenge in contemporary society. This review aims to elucidate the sources and characteristics of high-salinity wastewater, as well as the current status and trends in the field of high-salinity wastewater treatment. First and foremost, we explore the means by which high-salinity wastewater is generated in different industries and the principal salt components it contains. We revisit conventional methods for high-salinity wastewater treatment, including chemical precipitation, ion exchange, evaporation-crystallization, and reverse osmosis, while emphasizing the application of biotechnological approaches. This includes the utilization of salt-tolerant microorganisms, biological adsorption, biodegradation processes, and various types of bioreactors. Advanced oxidation technologies also play a crucial role in high-salinity wastewater treatment. We introduce advanced oxidation techniques such as ozone oxidation, UV-catalyzed oxidation, and high-pressure water oxidation, emphasizing their potential in degrading organic compounds and reducing salt concentration. Furthermore, we discuss hybrid approaches, such as case studies combining biological treatment with advanced oxidation technologies, and the advantages and challenges associated with these integrated techniques. Finally, we provide an outlook on future trends, including research on novel and efficient biodegrading agents, advancements and innovations in advanced oxidation technologies, and the development of intelligent high-salinity wastewater treatment systems. Policy and industry trends will also influence the direction of high-salinity wastewater treatment field development. In summary, high-salinity wastewater treatment represents a complex and pressing environmental challenge. However, through the integration of diverse treatment technologies and ongoing research efforts, it is anticipated that more effective, cost-efficient, and environmentally friendly solutions can be developed to mitigate the impact of high-salinity wastewater on ecosystems and society.
Research Progress in Microbial Degradation of Microplastics
Authors: Wang Qun , Hong Lei , Wu Ke , Li Mengmeng , Zhang Jie , Li Xu , Jin Jie , Liu Bin
Published: March 2024

The presence of microplastics is increasingly recognized as a major issue in environmental protection across the world, primarily as a result of their long-lasting nature and the potential harm they can inflict on ecosystems.Current methods for degrading microplastics include physical capture, chemical degradation and biological methods.Among them, microbial degradation has received much attention because it is economically feasible and environmentally friendly.This paper reviews the degrading microorganisms, microbial metabolites and microbial degradation mechanisms of three frequently utilized polymers, namely polyethylene, polystyrene and polyethylene terephthalate, and analyses the current problems of microbial degradation of microplastics, in order to provide ideas for the research on the development of microplastic-degrading enzyme preparations.
Preparation and Release Performance of Carboxymethyl Chitosan Gel Microspheres for Spinetoram
Authors: Xu Qing , Yan Changrui , Yang Jiang , Zhou Yuanjing
Published: March 2024

Pesticide controlled release technology is an effective measure to improve the efficiency of pesticide utilization. In this study, the controlled releasing gel microspheres of spinetoram were prepared by suspension-crosslinking. Carboxymethyl chitosan was the carrier, and calcium chloride and glutaraldehyde were the cross-linking agent. The diameter and morphology of microspheres were observed. The thermal stabilities of spinetoram-loaded microspheres were evaluated. The release properties of spinetoram loaded gel microspheres were investigated. The results showed that pesticide loaded microspheres were elastic balls with high strength, more thermal stability than traditional pesticides, and exhibited good performance of pesticide sustained release. The release of spinetoram was governed by the combination of swelling and erosion of carboxymethyl chitosan. This study would provide reference for the application of carboxymethyl chitosan in pesticide reduction and efficiency.
Preparation Technology of Lightweight High-strength Desulphurized Gypsum Block
Authors: Zhang Xiuli , Wang Zhaojia , Mao Jianwei , Huang Wei
Published: March 2024

In this paper, the relationship between the air entraining agent, retarder, lightweight aggregate, water-cement ratio and the performance of gypsum block is studied. Study results showed that the apparent density of gypsum block can be significantly reduced and its strength can be increased by using double mixing technology of air entraining agent and perlite to optimize production process and reduce water-cement ratio and energy consumption.
Research on Ultrasonic Vibration Assisted Grinding Technology of Quartz Fiber Reinforced Ceramic Matrix Composites
Authors: Zhang Pin , Xue Hongming , Ji Haonan
Published: March 2024

Ceramic matrix composites have good mechanical properties and high temperature resistance, but it is difficult to process. In order to solve the problems of fast tool wear and low machining efficiency in the dry grinding process, ultrasonic vibration assisted grinding technology of quartz fiber reinforced ceramic matrix composites is adopted in this paper. Grinding force, machining efficiency, tool wear and surface roughness are analyzed through the comparison experiment between the conventional grinding and the ultrasonic vibration assisted grinding. The influence of the ultrasonic vibration assistance and process parameters on machining quality and tool life is further obtained. According to the findings, when compared to traditional grinding, ultrasonic vibration grinding can lower the grinding force by 25% to 58% and the surface roughness by up to 16%. The tool life and machining efficiency can be significantly increased with the help of ultrasonic vibration.
Daqing Oilfield Cable Controlled Intelligent Separate Injection Technology Process Optimization
Authors: Zhang Weichao , Guo Mingri , Li Jinghui , Wang Lili , Wang Jing
Published: March 2024

The cable controlled intelligent separate injection process realizes the continuous monitoring and real-time measurement and adjustment of downhole parameters, greatly improves the measurement and adjustment efficiency, provides sufficient data for reservoir analysis, and helps to tap the potential of remaining oil in the later stage of ultra-high water cut. However, due to the multi-disciplinary application of downhole tools and complex process, it is found in the previous field test that The number of wells with more than two years of operation of cable controlled intelligent separate injection wells accounts for only 51.9%, which can not meet the needs of large-scale application. Through the fault analysis of the early test well, the key factors affecting the success rate of well completion are found. Aiming at the main problems, the flow control valve of the cable controlled intelligent water distributor, the cable sealing connection process and the well flushing valve structure through the cable packer are optimized and improved. The flow control valve of cable controlled intelligent water distributor is opened and closed smoothly under 10MPa pressure difference, and the leakage is less than 1m³/d; The connection between the cable and the cable controlled intelligent water distributor is sealed reliably, and the cable can pass through the upper and lower joints of the cable packer smoothly; Since the optimization of process technology until January 2023, 223 wells have been tested on site, and the number of wells with more than two years of operation has increased from 56.1% to 91.9%. The stability of the optimized cable controlled intelligent separate injection process has been improved, which lays a foundation for the large-scale application of this technology in the oilfield.
Research of the Bending characteristics of Aero Ball Joints at High Temperature and Pressure
Authors: Wang Yansong , Ren Zhanpeng , Deng Wenliang
Published: March 2024

As a piping element with excellent stress compensation performance, spherical joints are widely used in aerospace piping systems. However, in piping stress simulation, the presence of nonlinear features such as friction vice of the solid model of the spherical joints will lead to the difficulty of convergence of the calculations or the deviation of the results is too large, so in order to improve the convergence of the iterative process, “joint” joints are used to replace and simplify the original spherical joints, but this simplified calculation needs to accurately capture the characteristic parameters (such as bending stiffness and bending friction moment, etc). In order to improve the convergence of the iterative process, “joint” is usually used to replace and simplify the original spherical joint, but this simplified calculation needs to accurately capture the characteristic parameters of the spherical joint (e.g. bending stiffness and bending friction moment, etc.). This paper focuses on the bending characteristics of spherical joints by establishing a high-temperature and high-pressure test platform, and takes into account the difference between the test and the actual use of spherical joints, and further combines numerical simulation and BP neural network methods to predict the characteristics of spherical joints to meet the requirements of the actual use of spherical joints.
Self-hydrolyzing Submerged Flow Technology for Acid Coal Mine Drainage Treatment: Effective Removal of Iron Ions
Authors: Chen Jiancheng , Zhou Yihao , Chen Junwen , Hu Tao , He Peng , Gan Min , Jiang Zongman , Zhu Jianyu
Published: March 2024

In this study, mine wastewater from Leiyang, Hunan Province was taken as the research object to investigate the effect of using the method of self-hydrolytic submerged sedimentation to treat acid coal mine drainage. It was found in this study that the removal rate of sulfate ions and iron ions from the acidic coal mine drainage stock solution at pH=2.7 was very limited by self-hydrolytic sedimentation experiments relying only on pure vertical sedimentation flow treatment, but the hydrolytic treatment could greatly improve the solution environment and promote the formation of secondary minerals of sulfate ions and iron ions in the acidic coal mine drainage, which greatly improved the removal rate of iron ions. Both suspended and precipitated materials produced in the self-hydrolysis sedimentation experiments were hydroxylated iron sulfate secondary minerals- Schwertmannite [Fe8O8(OH)8-2X(SO4)X (1 ≤ x ≤ 175)], the formation of which is inextricably linked to the low pH environment and high concentration of sulfate and iron ions in coal mine wastewater. Self-hydrophoretic submerged flow can remove iron ions from acidic coal mine drainage at low cost and high efficiency, and the total iron removal rate of this system can reach 90.93% after 24 h of treatment, which has a favorable comprehensive utilization value.