bluuebunny/crossref_metadata_2025 huggingface dataset:
Therapeutic Potential of Isorhamnetin following Acetaminophen-Induced Hepatotoxicity through Targeting NLRP3/NF-κB/Nrf2
Authors: Rousta Ali-Mohammad , Mirahmadi Seyed-Mohamad-Sadegh , Shahmohammadi Alireza , Mehrabi Zhila , Fallah Soudabeh , Baluchnejadmojarad Tourandokht , Roghani Mehrdad
Published: March 2022

Acetaminophen (APAP)-induced acute liver injury (ALI) is the principal cause of acute liver failure (ALF) in some countries including the United States and with few available treatments. Isorhamnetin is a bioflavonoid that is found in medicinal plants like Hippophae rhamnoides L. and Ginkgo biloba L. with promising potential to regulate inflammatory responses. In this study, we evaluated the possible effect of isorhamnetin in prevention of APAP-induced ALI and analyzed further the involvement of oxidative stress and inflammation-associated factors. Male C57BL/6 mice were given isorhamnetin (25 or 100 mg/kg b.w., p.o.) three times at 48, 24, and 1 h before APAP administration (300 mg/kg b.w., i.p.). Functional indicators of liver injury were measured as well as analysis of oxidative stress- and inflammation-associated indices and liver histopathology was also conducted. Isorhamnetin at the higher dose of 100 mg/kg significantly lowered serum levels of ALT, ALP, and AST in addition to reduction of ROS, TBARS, IL-6, TNFα, NF-kB, NLRP3, caspase 1, and MPO and significantly prevented reduction of GSH, SOD activity, sirtuin 1, and Nrf2. Additionally, isorhamnetin alleviated pathological changes of the liver tissue and suitably reversed NF-kB and Nrf2 immunoreactivity. These findings show protective effect of isorhamnetin against acetaminophen-induced liver injury through reducing oxidative stress, inflammation, and pyroptosis which is attributed to its regulation of NF-kB, Nrf2, NLRP3, and sirtuin 1.
Case Series for Gamma Knife Surgery for Arteriovenous Malformation Associated Intracranial Aneurysms
Authors: Baek Jungwook , Kim Mooseong , Pyo Seyoung , Heo Youngjin , Kim Seong Ho , Ahn Cheol , Kim Jeongeun
Published: March 2022

Objective The incidence of aneurysms coexisting with arteriovenous malformations (AVMs) ranges between 2.7% and 16.7%. The anatomical relationship between AVM and aneurysm is critical in deciding the best management.

Methods Between October 1994 and August 2017, gamma knife surgery (GKS) was performed in six patients with AVMs and associated aneurysms. The patients consisted of four men and two women with a mean age of 37.8 years (range, 18−57 years). The mean follow-up was 34.2 months (range, 13−84 months). The mean maximal dose was 35.9 Gy and the mean margin dose to AVM was 18 Gy. Coil embolization was performed in one of the aneurysms prior to GKS. In our study, GKS was performed in six AVM-associated aneurysms. Of the six aneurysms, four were intranidal and two were pedicular. The mean volume of AVMs was 3.6 cm3 (range, 1.6−6.5 cm3).

Results The locations of aneurysms are as follows: four on posterior cerebral artery (PCA), one on posterior inferior cerebellar artery (PICA), and one on middle cerebral artery (MCA). Sublocation sites were MCA M3 above, PCA P3 above, and PICA distal. There were no GKS-related complications. Complete obliteration of AVM and aneurysm was documented in all four patients with intranidal aneurysm-associated AVMs. Both the aneurysm and AVM were completely obliterated in the two patients with proximal pedicular aneurysms.

Conclusion GKS is a possible treatment for AVM with associated intranidal or pedicular aneurysms located above P3 or M3, etc., in which there is less turbulent flow and jet flow.
Excited state trap in erbium doped borate glass
Authors: Huang Kai , Zhang Feng , Zhao Feng-Jiao , Yin Hong-Ming
Published: April 2022

Erbium doped borate glass is widely used in luminescent materials, the luminescence dynamics of erbium doped borate glass is of great significance for optimizing and improving the luminous efficiency. The 2% molar ratio erbium doped borate glass was synthesized by the traditional melt quenching method, and annealed at 260 °C below the borate glass transition temperature. The thermal performance parameters of borate glass undoped and doped with Er3+ were measured by differential scanning calorimetry with 10 °C/min. The transient emission spectrum and decay kinetics curves were measured for the luminescence mechanism of erbium doped borate. Er3+ ions have different lifetime when emitted at 556 nm with different excitation wavelengths, the excited state trap may exist in erbium doped borate glass.
Electronic properties and optical absorption of multi-layer phosphorene quantum rings
Authors: Liang Feixia , Fu Botao , Xie Haiqing , Wang Qiang
Published: April 2022

This paper presents the study of the electronic and optical properties of multi-layer phosphorene quantum rings (PQRs) by using the tight-binding model. The effects of the hole size and position, along with the number of layers in the PQR on the energy levels and the optical spectrum, are numerically analyzed. The calculations show that the electronic and optical properties can be tuned by the hole size, the hole position, and the number of layers. The coupling of the inner and outer edges depends strongly on the position of the hole. The findings suggest that the layer-dependent optical properties of phosphorene quantum dots and PQRs are related to the parity of the number of layers.
High-sensitivity graphene/Cu2O hybrid photodetectors based on photo-induced quantum capacitance
Authors: Liu Qiaoli , Tian Huijun , Zhang Shifeng , Wang Bo , Xu Li , Jin Yuxin , Hu Anqi , Guo Xia
Published: April 2022

Graphene/semiconductor hybrid photodetectors have attracted much attention recently for their excellent optoelectronic properties. However, high background current and 1/f noise limit their sensitivity. In this paper, the phenomenon of photo-induced quantum capacitance was found based on the transfer-free graphene/Cu2O/Cu structure. Under illumination, the Fermi level in graphene can be modulated by the photogenerated holes trapped in Cu2O nanoparticles, which causes the capacitance response phenomenon. The maximum capacitance response of 104 F/W with the minimum detectable light power of 5.3 fW was achieved at room temperature.
A new search for magnetic monopoles
Authors: Lopatka Alex
Published: April 2022

The latest results from CERN’s Large Hadron Collider have established a lower mass limit for the elusive hypothesized particle.
Diamond-defect NMR monitors a surface reaction
Authors: Miller Johanna L.
Published: April 2022

Few other techniques can track adsorbed molecules in real time under ambient conditions.
How did Mars lose its atmosphere and water?
Authors: Jakosky Bruce M.
Published: April 2022

They were mostly lost to space early in Mars’s history, in processes driven by the Sun’s UV photons and solar wind after Mars lost its magnetic field.
Crystal structure of the dodecanuclear coordination compounds [
Authors: Tambornino Frank , Hoch Constantin
Published: March 2022

By slow hydrolysis of solutions of [Eu(DMF)8]I3 or [Nd(DMF)8]I3 in dimethylformamide (DMF), single crystals of the coordination compounds [RE12(DMF)24 (HCOO)8(OH)16]I3·4DMF (RE = Eu, Nd) were obtained. Both compounds crystallise isotypically in a tetragonal structure with space group I422 (No. 97, Z = 2, a = 21.881(3), 21.6340(10) and c = 20.873(2), 21.0612(9) Å for Nd and Eu compounds, respectively). The crystal structure shows a [RE12O56] core unit with O atoms from formate and hydroxide anions μ3-bridging the metal centres. The dodecanuclear cationic units are arranged in a body-centred packing topology, surrounded by iodide anions in a β cage pattern. Rietveld refinement confirmed the structure model, and the presence of hydroxide anions was shown by FT-IR spectroscopy. Susceptibility measurements on the Nd compound showed paramagnetic behaviour and a temperature dependence of μeff typical for trivalent Nd cations.
Information structure and Jespersen’s cycle
Authors: Magistro Giuseppe , Crocco Claudia , Breitbarth Anne
Published: March 2022

In this paper we report the results of an exploratory experiment aiming to examine the division of labour between syntax, phonology, and information structure in linguistic change, in particular, Jespersen’s cycle. According to previous literature, new expressions of negation start out from narrow focus contexts and lose this restriction when they become reanalysed as neutral negators. This leads to the expectation that prosodic correlates of (narrow) focus should be lost in the syntactic reanalysis of emerging negative markers. Looking at a group of North Italian dialects that are currently at different stages of (incipient) Jespersen’s cycle, we show that in more advanced varieties, we find a reduction of the new negator in pitch, duration and spectral organization, confirming our hypothesis.
On the role of information structure in the licensing of null subjects in Old High German
Authors: Cognola Federica
Published: March 2022

This paper focuses on the distribution of null subjects in inti coordinated clauses in the Old High German translation of Tatian’s Diatessaron and shows that the presence of null referential subjects in this construction should not be analysed as a case of Topic drop of the same type of present-day German, but as a case of pure pro-drop of Romance type, involving the presence of a silent category pro licensed via a matching relation with a null Topic in CP (cf. Frascarelli 2007, 2018). The analysis will be shown to be able to also account for the presence of V1 main clauses with free-inversion (Inversion nach inti sentences, cf. Coniglio & Schlachter 2013) and to offer a novel scenario on the loss of both the Inversion nach inti construction and pro-drop in the history of German.
Africa’s lion economies and their gendered impacts: lessons from Asia
Authors: Gaynor Niamh
Published: April 2022

This Debate addresses the ‘Eastern turn’ in policy and direction among Africa’s fast growing lion economies. It focuses in particular on recent recommendations in the African political economy literature for a reorientation in investment towards low-wage, labour-intensive manufacturing industries. Drawing on relevant empirical studies from Asia, it argues that there are significant gendered implications to this Eastern turn which, to date, have largely been ignored in the mainstream African literature. A widening of discourse and policy in ways that move beyond ‘add women and stir’ approaches, to address broader structural constraints to women’s economic participation, is recommended.
Efficient stitching method of tiled scanned microelectronic images
Authors: Zhu Huabo , Han Xu , Tao Yourui
Published: March 2022

Sparse features and repetitive textures are frequently presented in microelectronic microscopic images. Therefore, it is challenging for image stitching to meet the requirements of high-speed precision manufacturing. A novel image stitching method for tiled images is proposed to generate panoramic images of microelectronics quickly and accurately. According to the preset scan trajectory, grids were established between adjacent images for feature matching. The clustering algorithm was used to screen reasonable and multiple sets of registrations. Then, all registrations were used as connecting edges, and images were used as nodes, to create a multigraph. The unique registration in multigraph was solved by a non-linear minimization problem with linear constraints. Finally, image transformations were computed in global optimization for rendering panoramic images via image warping. The experimental results show that the proposed method improves the stability and efficiency of image stitching, furthermore, it maintains an equivalent level of precision as the Fiji and microscopy image stitching tool methods.
Underwater turbulence effect on optical imaging
Authors: Ata Yalçın , Gökçe Muhsin Caner , Baykal Yahya
Published: March 2022

Modulation transfer function (MTF) of oceanic turbulence plays an essential role in the design and quality of underwater image sensing systems capturing optical signals. MTF gives clues about the characteristics of turbulence which can help image reconstruction where the image resolution can be increased in this way. In the paper, under the conditions of weak turbulence and Gaussian beam propagation, we derive the modulation transfer function for short-exposure and long-exposure images based on the recently developed turbulence spectrum model: Oceanic turbulence optical power spectrum (OTOPS). With the aid of the OTOPS model, the effect of measurable turbulence parameters, namely average temperature, average salinity concentration, and temperature-salinity gradient ratios, as well as imaging system parameters, namely receiver aperture radius and wavelength of the laser source on the MTF are reported. Obtained results indicate that MTF rapidly decreases with increasing relative spatial frequency and turbulence strength. Turbulence becomes stronger with the increase in the average temperature, average salinity concentration, energy dissipation rate, temperature-salinity gradient ratio and with the decrease in the temperature dissipation rate, wavelength.
Microwave signal generation with discrete mode laser diode
Authors: Yao Cheng-Kai , Chen Ying-Huan , Manie Yibeltal Chanie , Bitew Mekuanint Agegnehu , Peng Peng-Chun
Published: April 2022

Microwave signals with low phase noise can be broadly used in communication systems, satellite communications, and radar systems. Discrete mode laser diode (DM-LD) has the capacity to generate signals that meet the above requirements. Moreover, it has the following advantages such as stable operation over a wide temperature range, very high side mode suppression ratio, low sensitivity to optical feedback, and narrow linewidth. In this paper, we proposed and experimentally demonstrated DM-LD for generating the second harmonic signal in the self-starting microwave generation system. The results show that DM-LD effectively reduces the single sideband (SSB) phase noise of the fundamental signals and its second harmonic signals better than the same designed experimental system using a distributed feedback LD, which reduces the SSB noise of the fundamental signal/its second harmonic signal by over 16/22 dB, 18/22 dB, 13/19 dB at a frequency offset of 10 kHz, 100 kHz, and 1 MHz, respectively.
Purification in entanglement distribution with deep quantum neural network
Authors: Xu Jin , Chen Xiaoguang , Zhang Rong , Xiao Hanwei
Published: April 2022

Entanglement distribution is important in quantum communication. Since there is no information with value in this process, purification is a good choice to solve channel noise. In this paper, we simulate the purification circuit under true environment on Cirq, which is a noisy intermediate-scale quantum (NISQ) platform. Besides, we apply quantum neural network (QNN) to the state after purification. We find that combining purification and quantum neural network has good robustness towards quantum noise. After general purification, quantum neural network can improve fidelity significantly without consuming extra states. It also helps to obtain the advantage of entangled states with higher dimension under amplitude damping noise. Thus, the combination can bring further benefits to purification in entanglement distribution.
Hard-core Hall tube in superconducting circuits
Authors: Guan Xin , Chen Gang , Pan Jing , Gui Zhi-Guo
Published: April 2022

The Hall tube as a minimum model to simulate the integer quantum Hall effect is essential for exploring topological physics, while it has not been constructed in the recent developing successfully experiments on superconducting circuits. In this work, we propose a feasible experiment scheme using three legs superconducting circuits with transmon qubits to realize a Hall tube. Then we first investigate its topological properties. Since the time–reversal, particle–hole, and chiral symmetries are all broken for the system, the Hall tube belongs to the A class of the Altland–Zirnbauer classification. We obtain the corresponding topological phase transition both numerically and analytically. Since the chirality is a key character of the quantum Hall effect, we secondly investigate the chiral physics in the Hall tube. We find the topological protected chiral edge currents and discuss its robustness. Finally, we give the possible experimental observations of the topological state and topological protected chiral edge currents.
The optical-mechanical analogy for wave mechanics: a new hope
Authors: Delphenich D H
Published: April 2022

The continuum-mechanical formulation of wave mechanics suggests that there is an intermediate stage of theoretical generality between wave mechanics and point mechanics, namely, continuum mechanics. When that argument is applied to the corresponding transition from wave optics to geometrical optics, the corresponding intermediate stage is essentially the geometrical theory of diffraction, i.e., the theory of diffracted geodesics.
Generalized equations and their solutions in the (S, 0) + (0, S) representations of the Lorentz group
Authors: Dvoeglazov Valeriy V.
Published: April 2022

I present explicit examples of generalizations in relativistic quantum mechanics. First of all, I discuss the generalized spin-1/2 equations for neutrinos. They have been obtained by means of the Gersten-Sakurai method for derivations of arbitrary-spin relativistic equations. Possible physical consequences are discussed. Next, it is easy to check that both Dirac algebraic equation Det(

p
^

– m) = 0 and Det(

p
^

+ m) = 0 for u – and υ – 4-spinors have solutions with

p
0

=

±

E
p

=

±

p
2

+

m
2

. The same is true for higher-spin equations. Meanwhile, every book considers the equality p0 = Ep for both u – and υ – spinors of the (1/2, 0) ⊕ (0, 1/2) representation, thus applying the Dirac-Feynman-Stueckelberg procedure for elimination of the negative-energy solutions. The recent Ziino works (and, independently, the articles of several others) show that the Fock space can be doubled. We re-consider this possibility on the quantum field level for both S = 1/2 and higher spin particles. The third example is: we postulate the non-commutativity of 4-momenta, and we derive the mass splitting in the Dirac equation. The applications are discussed.
Michelson’s analysis of errors in his 1881/87 experiments of the two swimmers contest; Necessity of correcting college textbooks
Authors: Has Ioan , Miclaus Simona , Has Aurelian
Published: April 2022

The Paper highlights discovery from 2000 of two Errors (ERM81/87) by Michelson in analysis of his experiments ME81/87. ERM81/87 has also been addressed in series of previous articles by the authors. ERM81/87 consisted of assuming the transverse path of light ray 2 or of SW2 swimmer, to be an isosceles triangle (Error 1) inclined with angle β’ in referential frame (RF) ether/water (E/W), or a double orthogonal path (in RF device/bank (D/B)), thus calculating the wrong result, t2 < t1, or Δt = t1-t2 > 0, (Error 2), states SW2 wins the contest. In ERM81/87 it is proven firstly, by Demonstration 1, based on logic, starting from the non-observance in Michelson’s analysis, of rules of correctness and fair play, in development of the two swimmers contest (TSC). Rresulted in correct transversal path as a right triangle, with t2 = t1 (in RF, E/W), the correct contest result is a draw. Demonstration 2 consists, in correction of SW2 route, resulting under fair play conditions, for transversal path, a right triangle with hypotenuse inclined at angle 2β (in RF, E/W) and t2 = t1 or Δt = 0, with the contest result in a tie. Demonstration 3 is based on a new Generalised Case (GC) of the TSC where the orientation of the starting path of SW1 can be inclined at any angle α, always one obtains, t1 = t2, the correct result. Evidence provided shows Michelson designed his interferometer by analogy with TSC, Michelson considered SW2 the winner. Evidence provided in 1892 by Lorenz expressed doubts about the correctness of Michelson’s analysis of ME81/87, without finding errors. We show, an initial error (ERM81) was committed by Michelson in ME81analysis, erroneously superposing paths for SW2 (in RF, D/B), and in incorrect calculations of t2 and Δt obtaining t2 < t1, an error communicated to him by Potier, which also mentioned the correct result Δt = 0, without any demonstration. In analysis of ME87, Michelson acknowledged the error, modified the path of SW2 to isosceles triangle (in RF, E/W), and made new t2 calculation. But he reduced by only half, the Δt compared to Δt in ME81, meaning the basic error in Δt (ERM87) has persisted, until today. We emphasize that errors ERM81/87 in TSC are repeatedly printed, and appear in all college physics textbooks around the world, exemplifying by presenting four such excerpts from college textbooks from the US and Canada. Thus, a correction of ERM81/87 is required, starting with the correction of the TSC, by admitting the correct result of equality of SW1 and SW2, in all college physics textbooks. As result the ether can be reintroduced into physics with multiple consequences including re-evaluation of the Special Relativity Theory.
Presentation of a new physics theory based on the HM16 model of the ether
Authors: Has Ioan , Miclaus Simona , Has Aurelian
Published: April 2022

In this paper, we present a new physics theory that offers some explanations of physical phenomena in nature, including some that have remained unexplained to date. Our New Physics Theory 2016 (NPT16) is based on a new model of the ether called HM16.

The ether was eliminated from physics in 1905 by Einstein, through his Special Relativity Theory (SRT), based on experiments carried out in 1881/87 by Michelson (ME81/87). We reintroduce the ether to physics as a result of two errors that we have discovered in Michelson’s analysis of his experiments ME81/87. We initially proposed the development of NTP16 in 2016, and we now present an actualised, up-to-date form of NPT16. NPT is the result of taking into account the special properties of ETH ether, which in the HM16 model is characterized by its composition, as a deformable elastic body, without friction, so without energy consumption/loss. ETH consists of compact ether cells EC, which transmit the fundamental vibrations FVs of ECs, created by microparticles MPs, constituted as energy concentrations in their own vortices/oscillations, energy that creates even the mass m of MP. Longitudinal and transverse FVs vibrations, are transmitted between MPs and between ECs, by mechanical percussion pi, specific to the current positive or negative electric charge of an MP. And gravity is the result of the interaction forces FDC between the dipoles, so-called electric, but created by a Coulomb type force FCC, between two MPs completed with a term in lnr. And at astronomical distances, there is a ratio R = FDC/FN ≈ 1.60, which indicates the presence of an increase in the real mass of the stars, of about +60%, compared to the mass considered by gravitational Newton force FN, a result that can explain/replace the current fictitious dark matter. The NPT also gives a physical explanation of the phenomenon of increasing the mass of a material body MB, as its speed V increases. This speed V, leads to an accumulation of energy around MPs, stored in the ECs vortices of ETH around MP, created even by the V-speed motion of the MP. And the energy accumulated around the MP is added to the MP’s own energy, which is even the mass of the MP thus increased.
4G model of final unification – A brief report
Authors: Seshavatharam U V S , Lakshminarayana S
Published: April 2022

To understand the mystery of final unification, in our earlier publications, we proposed that, 1) There exist three atomic gravitational constants associated with electroweak, strong and electromagnetic interactions; 2) There exists a strong interaction elementary charge in such a way that, its squared ratio with normal elementary charge is close to reciprocal of the strong coupling constant; and 3) Considering a fermion-boson mass ratio of 2.27, quarks can be split into quark fermions and quark bosons. Further, we noticed that, electroweak field seems to be operated by a primordial massive fermion of rest energy 584.725 GeV and hadron masses seem to be generated by a new hadronic fermion of rest energy 103.4 GeV. In this context, starting from lepton rest masses to stellar masses, we have developed many interesting and workable relations. With further study, a workable model of final unification can be developed.
Logical and historical review on theoretical physics
Authors: Kanda A , Prunescu M , Wong R , Apostoli P
Published: April 2022

Since it started about three centuries ago, theoretical physics went through a huge advancement and, particularly in the last century, the development was material. Its application to engineering brought a massive revolution in the way we humanity live now. Its interpretation opened up astoundingly deep understanding of our universe. One important research activity for the future is to further develop our theories and to further deepen our understanding of the universe. However, as Tomonaga said, when we are in a phase of looking for new paradigm, it is important to understand how our current theory was developed. The purpose of this paper is to present a logical and historic study of the conceptual development of theoretical physics. As the field of theoretical physics is so vast, we cannot cover all theories we have now. We will focus on the most fundamental theories of physics. As this field of physics is as deep and intricate as pure mathematics, if not more, it will be helpful to compare our challenge with that pure mathematicians are facing in the field of the foundations of mathematics. Such common ground will inevitably lead us to deeper philosophical issues. After all what we call physics started with Newton who developed both calculus and dynamics. He called it not physics but natural philosophy. So, it is naturally expected that philosophy, mathematics and theoretical physics develop hand in hand. It has been about a century since these fields started to develop separately and it is about time to restart the original interaction between these three intrinsic intellectual activities. Certainly this will help our timely search for a new paradigm. We must move forward.
Study of Self-healing Behavior for Airy Beams in Atmospheric Turbulence
Authors: Lin Haibo , Wang Jinbao
Published: March 2022

The Airy beam shows its peculiar property of self-healing which attracts lots of attentions to do the researches about the higher dimensional nondiffraction beams which can apply to lots of aspects to doing researches. We demonstrate the self-healing property of Airy beam which displays similar profiles both in weak and strong turbulence in atmosphere. Highly similarity has been shown when the propagation distance is not very long. The self-healing exhibits its own profile in strong turbulence and stability in weak turbulence respectively with the longer propagation distance. However, the variation of exponential truncation factors and the transverse scales would not change the conclusion that the self-healing property would vanish at the same propagation distance both in weak and strong turbulence. It means that they would reach zero intensity plane with the same self-healing critical distance zs
and would not entirely disappear until reach the same disappearance critical distance zd
. This study provide a method to enhance the self-healing property of Airy beams.
High density and uniformity 1300 nm InAs/GaAs quantum dots grown on silicon substrate through molecular beam epitaxy
Authors: Hao H M , Su X B , Liu H Q , Shang X J , Ni H Q , Niu Z C
Published: March 2022

The integration of III/V materials into silicon-based microelectronics has been the momentum in the development progress of silicon photonics in the past few decades. In this paper, the growth of InAs/GaAs quantum dots with the high density of 6.5 × 1010/cm2 on silicon substrate is demonstrated. The influence of different deposition amount of indium on the density of quantum dots under the same arsenic flux pressure is discussed in detail, from 2.21 monolayer, 2.38 monolayer to 2.55 monolayer. Atomic force microscopy measurement and photoluminescence test are conducted to characterize the materials growth. The InAs/GaAs quantum dots exhibit the best dot density and size uniformity as well as the strongest intensity of photoluminescence at the deposition amount of 2.38 monolayer. This result provides stable foundation for the realization of III/V quantum dot materials as the photonic components into silicon-based lasers.
Creating a Sensor Tier for the EMULSION IoT Platform with Low-Cost Electronic Modules
Authors: Ganchev Ivan , Ji Zhanlin
Published: March 2022

This paper presents some of the designed and experimentally-tested low-cost electronic modules, utilized for the creation of a sensor tier for the generic, multi-service, cloud-based operational platform EMULSION, which is being elaborated for rapid building of mobile Internet of Things (IoT) systems and roll-out of corresponding IoT services. The next step is to achieve full integration of the designed modules with various other existing components with different processing and communication capabilities, as to allow 1,000,000 heterogeneous IoT nodes, deployed at the sensor tier of the platform, to communicate simultaneously online within a single EMULSION cluster.
Recognition of Foodborne Pathogens Terahertz Spectrum Based on Convolutional Neural Network
Authors: Zeng Wandan , Wang Qi , Wu Chengwei , Hang Mangmang , Huang Zhongmin , Huang Jielun , Xia Zhiping
Published: March 2022

Foodborne pathogenic bacteria detection is an important work, the traditional laboratory identification method, will cause irreversible damage to the sample, and the detection cycle is long. Compared with traditional biological detection methods, the greatest advantage of terahertz spectroscopy detection is that it can do non-destructive detection of samples, and terahertz spectroscopy technology, combined with computer systems, can reduce analysis time, improve recognition accuracy, and maximize the extraction and mining of effective information in the spectrum. This paper establishes an intelligent foodborne pathogenic bacteria terahertz spectroscopic recognition model, The results showed that the recognition accuracy of pathogens was 99.76%.
A helical elastic wave metasurface based on GSL
Authors: Yang Huagen , Feng Kan , Li Rong , Yan Jing
Published: March 2022

Based on the Generalized Snell’s Law (GSL), combined with the elastic wave propagation theory in the thin plate and beam structure, a new type of elastic wave metasurface is constructed. The metasurface structure realizes the design of equal gradient of transmitted wave phase according to the difference of the length of different helical curved beams. Through this structure, the transmission wavefront of the Lamb wave in the thin plate is controlled, and acoustic phenomena such as negative refraction and asymmetric transmission are realized, which proves the accuracy of the GSL theory and the feasibility of the structure. And on this basis, the use of the design of symmetrical attachment to the metasurface solves the problem of destroying the plate structure in the traditional elastic wave metasurface, and provides an effective new idea for the elastic wave metasurface.
Study on multiple linear regression prediction of bending fatigue life of steel wire rope
Authors: Zhang Fujun , Wang Shaolei , Liang Jianming , Shao Shuai , Zhu WenMing
Published: March 2022

Abstract.The fatigue bending life of wire rope is an important parameter of its service performance. In this study, three kinds of 6X19W+FC wire ropes with different diameters were selected, and each wire rope was equipped with pulleys of different diameters. The fatigue bending lives of the three wire ropes under different axial tensile loads were tested. On this basis, based on Feyrer’s bending fatigue estimation theory of steel wire rope, a binary quadratic regression function for predicting steel wire rope bending fatigue life is obtained by using multiple linear regression method, and the validity of the prediction equation is verified by comparing the theoretical predicted value with the experimental results.
Numerical Simulation of Mechanical Response of Bridge Foundation and Existing Tunnel Caused by Pipe Jacking Construction
Authors: Pan Zhiyu , Du Kun , Lv Feihua , Tao Shuai
Published: March 2022

Upward ( phase i ) pipe jacking project of hangzhou water intake is near existing bridge foundation and operating tunnel. In order to investigate the influence of pipe jacking construction process on existing structures, Plaxis 2D finite element software was used to simulate the horizontal and vertical displacement of existing structures caused by pipe jacking construction. The calculation results show that: The horizontal displacement of bridge pile foundation is nonlinear distribution. There is a bending point in the pile foundation. The maximum and minimum horizontal displacement are 0.71 mm and-0.84 mm, respectively. The maximum vertical settlement is only 0.29 mm. The horizontal displacement of the sidewall of the tunnel structure is nonlinear distributed, and the displacement near the pipe jacking is relatively large, but the maximum displacement is only 0.13 mm. The vertical deformation of tunnel structure is mainly uplift deformation, and the uplift near the pipe jacking is obvious, but the extreme value of uplift is only 0.09 mm. Thus, the impact of pipe jacking construction on bridges and tunnels is very limited. The research results are of great significance to the safety evaluation of pipe jacking engineering near construction.
Research on Dynamics Behaviors of Two Coaxial Circular Cylindrical Thin Shells Constructed with Functionally Graded Materials
Authors: Cao Jianhua
Published: March 2022

The paper reports the dynamic characteristics of two coaxial circular cylindrical thin shells (CCTSs) containing internal or annular flowing fluid in which one shell is constructed with functionally graded materials (FGMs). A new set of shell equations are firstly used to analyse the vibration of fluid-conveying thin shells. Two cases, i.e. inner shell or outer shell is constructed with FGMs, are calculated by adopting the Galerkin’s method. The results show that as the volume fraction index increases, the natural frequencies don’t always decrease which depend on the positions of FGM shell and flowing fluid of two coaxial CCTSs. The paper indicates that the effects of FGM shell cannot be neglected for the design of FGM shells conveying fluid.
A mechanical model of three-dimensional electrospun fiber scaffolds
Authors: Yuan Bo , He Xianyun , Zhang Tao
Published: March 2022

Fiber scaffolds prepared by electrospinning method can be used for the repairing of soft tissues such as skin, and have been widely used in biomedical field. The mechanical properties of scaffolds needed to be considered in the process of preparing scaffolds. Based on the principle of statistics and the method of micromechanics, a mechanical model for calculating the elastic characteristics of fiber scaffolds with spatial random distribution characteristics was established. The model comprehensively considered the parameters such as mechanical properties of constituent units of fiber scaffolds, fiber diameter and fiber density. The quantitative relationship between the elastic mechanical properties of fiber scaffolds and their tissue unit parameters can be calculated, which provided a research basis for further research and improvement of the mechanical properties of three-dimensional fiber scaffolds.
Working Principle and Applications of Active and Passive Microfluidic Valves
Authors: Ju Tianqi
Published: March 2022

Microfluidic valves are widely used in the field of microfluidics. The research on microfluidic valves plays an essential role in the development of the microfluidic field. This paper is an overview of the working principle and application of two different microfluidic valves (active and passive). This paper reviews the types of active and passive valves, expounds the mechanisms of active and passive valves, and introduces some applications. In this paper, different active and passive microvalves are divided into different parts according to their working principles, and the application, advantages and disadvantages of active and passive valves with different working principles are introduced in detail. This paper also discusses the development history and limitations of active and passive valves. In the conclusion part, the development status of microvalves is summarized, and some deficiencies are put forward. The conclusion also covers the prospect of the future development of microvalves.