Principle Of Resonance Research Articles

基于能量利用率的油茶果机械化采摘试验与分析

In order to use the resonance principle for vibratory picking of Camellia oleifera fruit, the frequency sweep tests were carried out on the fruiting branches of Camellia oleifera trees. The results showed that the acceleration response of fruit-bearing branches had good consistency. The use of fruit removal rate alone to evaluate the picking effect is not reliable, and the introduction of energy utilization to evaluate the vibration picking effect is significant. The best results were a vibration frequency of 8 Hz and an excitation time of 10 s. The fruit removal rate was 88.12% and the energy utilization rate was 36.72%. Compared with the traditional fruit shedding rate, the application of energy utilization rate to evaluate the picking effect can improve the reliability of the results and reduce the energy loss.

A new method of generating the lump molecules and localized interaction solutions to the (2+1)-dimensional SK equation

The (2+1)-dimensional Sawada-Kotera (SK) equation is an important integrable model, which has wide applications in rivers, lakes, atmosphere, the conformal field and quantum gravity gauge field. In this paper, we introduce a new method for constructing the lump molecules in the SK equation. Then, by using this method and imposing the complexification restrictions, velocity resonant principle, we obtain some hybrid wave solutions, which include the interactions between a lump molecule and two separated solitons, between a lump-lump-soliton molecule and a single soliton, between a lump molecule and a soliton molecule, between a lump molecule and a breather, as well as the lump-lump-breather molecule. Dynamical behaviors of these solutions are analyzed theoretically and graphically. The method introduced can be effectively used to study the wave solutions of other nonlinear PDEs. The results obtained not only enrich the types of soliton molecules, but also can be helpful in the study of the propagation behaviors of nonlinear waves.

Principles of nuclear magnetic resonance and its applications in medication

There is no doubt that the Nuclear Magnetic Resonance is one of the most fascinating inventions in modern era. Nuclear magnetic resonance is the physical process of nucleus in the body, which align with the direction of magnetic field under the action of external magnetic field, resonant absorb the radio frequency pulse of a certain frequency. NMR spectroscopy is a branch of spectroscopy in which the resonant frequency is in the RF band and the corresponding transition is a transition of the nuclear spin on the magnitude of the nuclear energy. With its large-scale application in various aspects, people’s life was facilitated greatly. In the field of medication, as a new imaging technique, it has no negative effect on human health, and high-resolution image could be produced without any radiation. Millions of patients and injuries could get the correct diagnosis and lead a healthy life later on thanks to it.

Advances in Portable Heavy Metal Ion Sensors.

Heavy metal ions, one of the major pollutants in the environment, exhibit non-degradable and bio-chain accumulation characteristics, seriously damage the environment, and threaten human health. Traditional heavy metal ion detection methods often require complex and expensive instruments, professional operation, tedious sample preparation, high requirements for laboratory conditions, and operator professionalism, and they cannot be widely used in the field for real-time and rapid detection. Therefore, developing portable, highly sensitive, selective, and economical sensors is necessary for the detection of toxic metal ions in the field. This paper presents portable sensing based on optical and electrochemical methods for the in situ detection of trace heavy metal ions. Progress in research on portable sensor devices based on fluorescence, colorimetric, portable surface Raman enhancement, plasmon resonance, and various electrical parameter analysis principles is highlighted, and the characteristics of the detection limits, linear detection ranges, and stability of the various sensing methods are analyzed. Accordingly, this review provides a reference for the design of portable heavy metal ion sensing.

Abstract 4814: Compensatory interplay of p97 segregase and HSP70 chaperone protect cancer cells from heat-induced proteotoxicity

Abstract Due to malignant transformation, cancer cells are characterized by elevated levels of genotoxic, replication or proteotoxic stresses, which makes them vulnerable to various external conditions, including increased temperature. Thus, hyperthermia represents a very effective therapeutic modality usually combined with standard chemotherapy or radiation. Moreover, the elevated temperature is often used in experimental studies related to protein aggregation, cellular heat shock response and other proteostasis mechanisms relevant to cancer progression and treatment. Recently, we developed a single-cell method to inflict defined, subcellular thermal damage, adopting the plasmon resonance principle. Dose-defined heat causes protein damage in subcellular compartments, rapid heat-shock chaperone recruitment, and ensuing engagement of the ubiquitin-proteasome system, providing unprecedented insights into spatiotemporal response to protein damage relevant to cancer. Using this versatile method, we discovered so-far unsuspected compensatory interplay of p97 translocase, the ubiquitin-proteasome system and heat shock protein chaperones in the processing of heat-damaged proteins. As both, p97 and heat shock proteins, represent potential cancer-relevant drug targets, these results can contribute to the development and better implementation of related therapies in cancer treatment. Citation Format: Zdenek Skrott, Katarina Chroma, Petr Muller, Ales Panacek, Jiri Bartek, Martin Mistrik. Compensatory interplay of p97 segregase and HSP70 chaperone protect cancer cells from heat-induced proteotoxicity. [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2023; Part 1 (Regular and Invited Abstracts); 2023 Apr 14-19; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2023;83(7_Suppl):Abstract nr 4814.

The Application of Nanofibrous Resonant Membranes for Room Acoustics

Solitary sound absorbing elements exist; however, their construction is massive and heavy, which largely limits their use. These elements are generally made of porous materials that serve to reduce the amplitude of the reflected sound waves. Materials based on the resonance principle (oscillating membranes, plates, and Helmholtz's resonators) can also be used for sound absorption. A limitation of these elements is the absorption of a very narrow sound band to which these elements are "tuned". For other frequencies, the absorption is very low. The aim of the solution is to achieve a high sound absorption efficiency at a very low weight. A nanofibrous membrane was used to create high sound absorption in synergy with special grids working as a cavity resonator. Prototypes of the nanofibrous resonant membrane on a grid with a thickness of 2 mm and an air gap of 50 mm already showed a high level of sound absorption (0.6-0.8) at a frequency of 300 Hz, which is a very unique result. Since acoustic elements, i.e., lighting, tiles, and ceilings, are designed for interiors, an essential part of the research is also the achievement of the lighting function and the emphasis on aesthetic design.

Sensitivity-enhanced nanoplasmonic biosensor using direct immobilization of two engineered nanobodies for SARS-CoV-2 spike receptor-binding domain detection

Sensitive, rapid, and easy-to-implement biosensors are critical in responding to highly contagious and fast-spreading severe acute respiratory syndrome coronavirus (SARS-CoV-2) mutations, enabling early infection screening for appropriate isolation and treatment measures to prevent the spread of the virus. Based on the sensing principle of localized surface plasmon resonance (LSPR) and nanobody immunological techniques, an enhanced sensitivity nanoplasmonic biosensor was developed to quantify the SARS-CoV-2 spike receptor-binding domain (RBD) in serum within 30 min. The lowest concentration in the linear range can be detected down to 0.01 ng/mL by direct immobilization of two engineered nanobodies. Both the sensor fabrication process and immune strategy are facile and inexpensive, with the potential for large-scale application. The designed nanoplasmonic biosensor achieved excellent specificity and sensitivity for SARS-CoV-2 spike RBD, providing a potential option for accurate early screening of the novel coronavirus disease 2019 (COVID-19).

Temperature-insensitive water content estimation in oil-water emulsion using POF sensors

This paper presents the development of an optical fiber sensor for water content estimation in oil–water emulsions. The sensor is based on the surface Plasmon resonance (SPR) principle applied in a polymer optical fiber (POF). For the sensor fabrication, a D-shape is performed on the POF to expose its core region, which has a gold thin film (nanometer thickness) for the SPR signal. The sensor is analyzed as a function of the water content in different emulsions conditions (from 0 to 55.5 M of water content), where a sensitivity of − 0.0288 nm/M was obtained. In addition, the sensor presented a sensitivity of the transmitted optical power variation as a function of the water content. These results lead to the possibility of data fusion between optical power and wavelength responses to obtain a high accuracy in the water content estimation. In this case, a root mean squared error (RMSE) of 1.36 M was obtained on the emulsion characterization. As an important drawback in general sensors applications, the temperature cross-sensitivity was also analyzed, where a sensitivity of 0.118 nm/°C was obtained. Such temperature sensitivity of the sensor leads to errors in emulsion characterization as a function of the temperature. To address this issue, a compensation method based on direct difference between the sensor’s sensitivities is proposed. By applying the proposed compensation method, a reduction of the temperature-induced errors in the water content estimation from 6.46 %±7.81 % to only 0.32 %±1.96 %.

Incipient Bearing Fault Diagnosis Based on the Two-State Theory for Stochastic Resonance Systems

The principle of stochastic resonance (SR) has been intensively used in designing algorithms for incipient bearing fault diagnosis based on stochastic simulation. In order to directly apply the semi-analytic result to the laboratory designs, an incipient bearing fault diagnosis algorithm based on the method of moments for stochastic resonant systems was proposed, with its real-time monitoring efficiency being assured by an available table of the involving stationary moments. Nevertheless, since the noise that buried the fault signal can only be estimated after sampling, calculation of such stationary moments might be an inconvenience. To fix this inconvenience, a brand-new fault diagnosis algorithm is designed in this paper based on the two-state theory for a biased underdamped bistable stochastic resonant system. The capability and the efficiency of the algorithm in identifying the characteristic frequency of the hidden fault signal are confirmed with the experimental data sets. This investigation actually opens a new way for improving the existing SR-based diagnosis algorithms.

Harnessing cavity dissipation for enhanced sound absorption in Helmholtz resonance metamaterials.

Helmholtz resonance, based on resonance through a pore-and-cavity structure, constitutes the primary sound absorption mechanism in majority of sound-absorbing metamaterials. Typically, enhancing sound absorption in such absorbers necessitates substantial geometrical redesign or the addition of dissipative materials, which is non-ideal considering the volume and mass constraints. Herein, we introduce a new approach - that is to simply reshape the cavity, without alterations to its overall mass and volume - to drastically enhance sound absorption. This is achieved by bringing the cavity walls close to the pores where additional thermoviscous dissipation along these boundaries can occur. Experimentally validated, with three sides of the cuboid cavity close to the pore and at a particular pore-cavity geometry, a 44% gain in maximum absorption is achieved compared to the original structure. Through numerical simulations, we fully elucidate structure-property relationships and their mechanisms, and propose analytical models for design and optimization. Ultimately, utilizing this concept, we demonstrate a heterogeneously porous broadband (1500 to 6000 Hz) absorber that exhibits an excellent average absorption coefficient of 0.74 at a very low thickness of 18 mm. Overall, we introduce a new and universal concept that could revolutionize the design principles of Helmholtz resonators, and demonstrate its potential for designing advanced sound-absorbing metamaterials.

The influence of the grazing flow and sound incidence direction on the acoustic characteristics of double Helmholtz resonators

Restricted by the principle of resonance, Helmholtz resonators can effectively absorb noise only near the resonance frequency. It is an effective way that the coupling design of the multiple resonators to broaden the absorption band. In practical application, Helmholtz resonators are usually arranged in the flow duct, so that will be affected by the working condition. In order to investigate the influence of the grazing flow and the sound incident direction on the acoustic performance, both numerical simulations and experiments are conducted. A three-dimensional model of the double Helmholtz resonators is established. By solving the linearized Navier–Stokes (LNS) equations, the sound transmission loss of the system in two sound incident directions is predicted where the mean flow Mach number is 0 and 0.1, respectively. The absorption, reflection, and transmission coefficients are further obtained. Based on the comparison of the flow fields and sound fields, the mechanism of the variation of the acoustic characteristics is analyzed. The experimental results show that the maximum sound transmission loss decreases by 16.9 dB, and the resonance frequency increases by 59 Hz. Both numerical and experimental results indicate that the grazing flow weakens the ability of noise suppression and the low-frequency characteristics of the double Helmholtz resonators in this paper. The inherent asymmetric absorption/reflection phenomenon vanishes, and the acoustic characteristics of the coupled system are dominated by the background flow. While the exchange of the sound incidence direction can mitigate the penalty of the grazing flow on the coupled system.

Device‐assisted therapies in MGD

AbstractMeibomian gland dysfunction (MGD) is the most frequent cause of evaporative dry eye disease (DED). Until now, the only available treatments were as follows: warm compresses, massage, omega 3, and antibiotics. As a result, multiple devices have appeared in the marketplace designed to use heat and pressure to alleviate MG blockages, as well as to remove residue along the lid margins. The mechanism of action of Lipiflow®, Miboflo®, iLux® and Jett Plasma Lift® is thermal expression. The Lipiflow® consists of a console and a single‐use sterile device that uses sensor‐regulated heat and peristaltic motion to evacuate obstructed meibum. One section of the device goes behind the eyelids, providing the warmth; an outer section gently massages the lids against the inner section. Its effects last usually 12 months. Jett Plasma Lift also remove keratinized material from de lid margin. ILux® system is not available in Europe.​Intense pulsed light (IPL) was originally developed for use in dermatology. Brief, powerful bursts of light at specific wavelengths (in this case, between 500 and 800 nm) cause changes in blood vessels near the surface of the skin, raise skin temperature and eliminate problematic flora on the skin and eyes, all of which may have a beneficial effect on meibomian gland dysfunction. Closing the abnormal vessels decrease inflammation and oxygen supply to meibocytes (they work in anaerobic conditions). Usually four sessions are needed. Expression with forceps and the treatment directly of the lids improve results. There are multiple platforms and not all are the same. BlephEx® produces microblepharoexfoliation. It's typically repeated at four to six‐month intervals. It is useful for anterior blepharitis. Rexon‐Eye® is an electro‐medical device for the treatment of DED. The applied electrical stimulation is based on the principle of quantum molecular resonance. Transferring energy to biological tissues in the form of high frequency oscillating electrical fields biostimulate the lachrymal and the MG. Thus, it is helpful for evaporative and aqueous‐deficient DED.​The use of these devices reset the MG. They should be used on the glands before they atrophy. A combination of these treatments will probably work best for difficult patients. Independent clinical trials and studies comparing these devices and the new coming instruments are needed.

Detection Method Based on RFID Tag on the Metal Surface

In radio frequency identification (RFID) technology, RFID tags’ work on the metal surface is greatly affected by the metal, and the read/write distance and read rate of the tag will be reduced along with the change of the distance between the tag and the metal surface. Aiming at this feature, this paper studies and designs two kinds of metal-resistant UHF RFID micro-strip tags with a center frequency of 915MHz according to the “resonant cavity principle” and HFSS simulation software. After optimization, the size of the tag antenna is reduced. Through the distance expression and experiment, we verify the maximum recognition distance between the reader, and the tag can reach 3.46m, which can solve the problem of conventional RFID tags by metal interference.

Efficacy of Environics Color Slides in Detecting the Color Deficiency and Healing

Chromotherapy, also called Color Therapy or Visible Range Radiation Therapy, is a non-pharmacological therapeutic modality that uses various wavelengths of electromagnetic radiation from within the visible spectrum (colors).
 Methods & Materials: The study was performed on 65 healthy participants from SGT University, Gurgaon, India. Full, free, and voluntary informed consent was obtained from all subjects and/or their legal guardian(s). Colour deficiency was diagnosed with the help of Environics Colour Slides and an Instrument called Lecher Antenna which works on the principle of resonance. The diagnosis results obtained from color slides and Lecher Antenna, (SBJ International, PARIS) were compared with the results obtained from the Es- Teck Complex, (LD Technology™, US) an FDA-approved Medical Software and Machine.
 Results: It was observed that 86.11% of participants showed improvement in their health conditions after using the Environics Colour Slides for the period specified during the diagnosis. It was also observed that there was an 87.69% correlation between the findings of the Environics Colour Slides / Lecher Antenna combination and the ES-Teck Medical Software in identifying the health condition of the participants.
 Conclusion: Chromotherapy will greatly benefit from this evidence base and help propagate this alternative treatment modality for the safe, and non-pharmacological treatment of many diseases [5].

Features of The Treatment of Parkinson's Disease by The Method Resonance Therapy

Parkinson disease (PD) is a degenerative disease of the extrapyramidal motor system. The formations of the midbrain are affected and are expressed in 1. tremor, 2. hypokinesia, 3. muscle rigidity, 4. postural instability. With these diseases, a large number of brain structures degenerate, including demyelinating brain processes. Both diseases are considered incurable. This article presents materials for the effective treatment of diseases by the method of resonance medicine - the resonance of creation and resonance of destruction. With the help of the resonance of creation, the degenerated structures of the brain are restored. Until now, no methods have been known to restore dead brain cells. For the treatment, the resonance therapy method was used, which has been known for at least 25 years and which has been modified in our work since 2016. The essence of our modification was that the author began to use 1. not only low (previously known), but also high potencies of resonant drugs. 2. We have created a direction in resonance therapy, which is called "resonance of creation" and "resonance of destruction". Resonance of destruction is known, with the help of which oncological tissues, infectious processes, cysts, stones, etc. are treated - destroyed. With the help of the resonance of creation, various biological structures that have undergone degeneration and death are restored - the myelin sheath of the nerves in multiple sclerosis, nerve cells in Parkinson's disease and Alzheimer's disease, etc. With the help of the resonance of creation, the beta cells of the tail of the pancreas are restored in type 1 diabetes, and restoration of the lymphoid system in autoimmune diseases. sis. For the treatment of PD , appropriate preparations are prepared from the tested organopreparations. They are recorded on sugar grains in the potency that is necessary for treatment and resonant treatment of patients is carried out. Treatment of all tested brain structures showed that the patient responds to this treatment quite adequately. In the process of treatment, the “insular cortex” was the first to stop testing, then the “basal nucleus”. As the testability of these brain structures decreased, the patient reported that his condition became significantly better, not only in terms of short-term memory recovery, but also in other indicators. It is well known that the cause of Parkinson's disease is not only the degeneration of various brain structures, but also the appearance of substances with the accumulation of alpha-synuclein protein and Lewy bodies in the cells. It is absolutely impossible to remove alpha-synuclein and Lewy bodies from cells by the method of resonance of creation. That is why to remove these substances in our work we use the principle of treatment - the resonance of destruction. As a result of using this method, the condition of patients with PD improved even more compared to the results that were presented when using only the principle of resonance of creation for treatment. In the selector of the device we find the nosode "Parkinson's disease", we select the necessary potency of the therapeutic drug for the patient in the same way as it was in our other work and write down the drug that the patient takes and is cured on sugar grains. Thus, for the treatment of PD, we use not only the principle of the resonance of creation, but also the resonance of destruction, which together give good results for the treatment of PD.

Internal Resonance of the Coupling Electromechanical Systems Based on Josephson Junction Effects.

The internal resonances of the coupling vibration among electro-dynamic modes of an NEMS are studied for the coupling resonators connected on a Josephson junction. The methodology adopted involves coupling a resonator connected on a Josephson junction. The mathematical model of the coupled system is then obtained by considering the regulatory nonlinear effect of the phase difference of that Josephson junction. The resulting dynamic differential equation is deduced by considering the nonlinear terms of the Josephson junction and the nanobeam. The multi-scale method is then used to obtain the 1:1:1 resonant amplitude-frequency response equation of the coupled electromechanical system. The influence of the phase difference of the Josephson junction, magnetic field, external excitation and other factors are analyzed based on the internal resonant amplitude of the coupled system. The simulation results illustrate that the changes in the values of the magnetic field, excitation amplitude and divided resistances can lead to a remarkable change in the values of the nanobeam frequency and amplitude. The internal resonance principle is used to generate a mutual conversion and amplification among electrical signals and mechanical signals. This research provides a theoretical framework and a numerical approach for improving the sensitivity of magnetic quality detection.

Plasmonic Logic Gates at Optimum Optical Communications Wavelength

This paper displays a design that realizes all optical logic gates (NOT, AND, OR, NAND, NOR, XOR, XNOR) and consisting of one nanoring and four strips Operates on the principle of resonance. the proposed design works at the wavelength of 1550 nm using insulator-metal-insulator (IMI) plasmonic waveguide. The basic principle of the operation of these gates is input and control signals’ constructive and destructive interference. The proposed transmission threshold’s value is 0.25 between OFF state and ON state. The proposed design has small dimensions (300 nm × 300 nm) and can realize seven logic gates with maximum transmission 134% at NOT gate, 223% at OR gate, 134% at NAND gate and 223% at XNOR gate where the design is optimum and excellent design and the modulation depth is very high because it’s ranges in all gates more than 90%. The proposed structure contributes in building nanocircuits for integrated photonic circuits and optical signal processing.

Design and analysis of Micro-channelled Quasi D-shape optical Fiber plasmonic Sensor

This study reports on numerical investigation carried out over a newly designed open micro-channel incorporated, side polished single mode fiber (SMF) based plasmonic sensor. The proposed sensor operates on the principle of surface plasmon resonance (SPR) phenomenon to enhance the sensing performance. The commercially available COMSOL Multiphysics software tool is used to design sensor and finite element method (FEM) is used for numerical investigation. From the detail study, an average sensitivity of 1757 nm/RIU (refractive index unit) is obtained with a nanoscale gold strip for wide range of analyte RIs from 1.33 to 1.38. Result indicates that the fabricated sensor can be effectively used in RI measurement of the various fields involving chemical and biological sensing.

Model Predictive Control for Grid-Connected Current-Source Converter With Enhanced Robustness and Grid-Current Feedback Only

The current-source converter (CSC) features the second-order characteristic, and multivariable feedback is necessary to suppress the filter resonance. Model predictive control (MPC) has shown advantages in terms of the multiple-input–multiple-output (MIMO) system. This article contributes to the MPC scheme applied to CSC from two aspects. First, based on the typical one-step prediction, existing MPC with both grid-current and capacitor voltage feedback has been applied to mitigate the resonance issue but lacks the investigation and improvement of system robustness to parameter mismatch, especially in such a second-order system. Thus, the dual-disturbance observer is proposed, where both the additional capacitor voltage reference and the lumped input disturbance caused by parameter mismatch are estimated online. As a result, the grid-current reference tracking performance can be improved under mismatched parameters. Second, to reveal the resonance principle with different state feedback types, the tracking process of the grid current is intuitively analyzed in the time domain. The MPC scheme is further assessed by increasing the prediction horizon length, and the results show that the CSC can work well with only gird-current feedback. In this case, both the weighting factor and corresponding reference estimation for the capacitor voltage can be avoided, thus significantly simplifying the design stage and reducing the effect caused by the parameter mismatch. Experimental results verify the effectiveness of the proposed scheme and perspectives.

A comprehensive look at magnetic resonance imaging

Introduction: High-resolution pictures of soft tissue may be obtained using magnetic resonance imaging (MRI). Sophisticated chemical and physical data may be gathered using this spectroscopic approach, which depends on the magnetic resonance principle as its base. Aim: The purpose of this article was to provide a short overview of MRI, different contrast agents in MRI, its use in oral medicine, its contraindications, and the most recent MRI discoveries and artifacts related to MRI. Methods: An online search was conducted using databases such as PubMed, Embase, Web of Science, Scopus, and Google Scholar to locate articles that dealt with MRI, oral medicine, recent advancements, dental applications, and contrast agents. The search was limited to studies that were published before March 2022. Results: A total of 31 articles were included and analyzed for this review. Conclusion: MRI is more sensitive than other imaging modalities in the diagnosis of soft tissue in the head-and-neck area; the use of three-dimensional imaging will expand further advancements in this imaging modality.