Jin Chen

Princeton University | PU · Princeton Plasma Physics Laboratory

Piggyback basins on the margins of growing orogens commonly serve as sensitive recorders of the onset of thrust deformation and changes in source areas. The Bieertuokuoyi piggyback basin, located in the hanging wall of the Pamir Frontal Thrust, provides an unambiguous record of the outward growth of the northeast Pamir margin in northwest China fro...

When fault arises in rolling bearings, the envelope demodulation analysis is the most commonly used method. However, when rolling element fault arises in a rolling bearing, the envelope demodulation analysis could not extract the rolling element fault characteristic frequency perfectly due to the rolling element's contact with the outer race and in...

A novel fault diagnosis method for rolling bearing was proposed based on neighborhood component analysis(NCA). NCA was used to reduce the dimensions of input features in both time and frequency domains. Then the classification was performed. Fisher evaluation function was applied to select the proper object dimension. In order to show the advantage...

The fusion of multi-channel bearing monitoring information can obtain more accurate results in bearing fault diagnosis. Here, a rolling element bearing fault diagnosis scheme based on KPCA and coupled hidden Markov model (CHMM) was presented. At first, the features were extracted from bearing vibration signals of multi-channel, respectively. Then,...

When fault arises in the rolling bearing it usually takes on cyclical characteristics. Firstly, the desired source signal is extracted coarsely and the weight separation matrix Ŵ is obtained by the proposed algorithm using the estimated fundamental period of the desired fault signal. Then, the fixed-point algorithm is applied to the observed signal...

The fold scarp, a type of geomorphic scarp on the land surface formed by folding without fault offsets on the surface, can be used to constrain folding and slip rates and kinematics and to reconstruct a folding history despite a lack of full constraints on the subsurface structure. Recently, the conceptual, geometric, and kinematic models of fold s...

Aim To describe how pegylated glucose-coated gold nanoparticles (PEG-Glu-GNPs) can help improve computed tomography (CT) imaging. Materials and methods PEG-Glu-GNPs were designed for use as an imaging nanoprobe to act an effective contrast agent for both CT and PET scans. Twelve BALB/c mice were divided into two groups: mice with injected with PEG...

A vibration simulation system based on a voice coil motor and a piezoelectric actuator is designed. It can be used to simulate the beam jitter which is caused by the airborne vibration in the free space optical communications. The simulation system can take advantage of the voice coil motor and the piezoelectric actuator, and its angular resolution...

Bearing fault characteristic frequencies contain rather weak energy when the early fault occurs, and they are often overwhelmed in noise. According to the research results on the fault mechanism of rolling bearings, the demodulation of bearing resonance frequency is helpful in improving SNR and extracting the characteristic frequencies. Based on ti...

Fast Fourier transformation (FFT)-based near-field acoustic holography (NAH) requires that measurement aperture should completely enclose a source, but it is impractical for large-scale sound sources. Helmholtz equation least square (HELS) method allows patch acoustic field reconstruction. However, it's not suitable for reconstructing acoustic radi...

When an early rub-impact occurs in a rotor system, its vibration signal is mainly composed of a periodic component with rotor rotating frequency and transient impulse signal components caused by rub-impact between the rotor and bearings. The periodic component with rotor rotating frequency can be defined as a signal with a higher Q-Factor and the t...

Here, the fault diagnosis method for rolling bearing based on compensation distance evaluation technique (CDET)-wavelet kernel principal component analysis (WKPCA) was proposed. Firstly, the CDET was used for dimension reduction. Then the WKPCA was applied to dimension-reduced fault feature vectors and a better classification result was obtained. C...

The coupling efficiency of received optical power into a single-mode fiber is degraded by atmospheric turbulence in a free space optical communication system. The expression of average coupling efficiency of a collimated Gaussian beam into a single-mode fiber was derived under Kolmogorov turbulence channel, according to the theory of weak turbulenc...

Two projects were introduced in October 2007 to improve treatment completion among rural-to-urban migrant tuberculosis (TB) patients in Shanghai. The Communicable Disease Research Consortium (COMDIS) project provided financial incentives to poor patients, whereas the Global Fund to Fight AIDS, Tuberculosis and Malaria (Global Fund) project provided...

Fast Fourier transform-based near-field acoustic holography requires that the measurement aperture should completely enclose the source, which is impractical for large-scale sound sources. Helmholtz equation least-squares method can reconstruct the acoustic field with fewer measurements than fast Fourier transform-based near-field acoustic holograp...

Folding growth in three dimensions involves shortening in transversal direction, uplift in vertical direction and lateral propagation in longitudinal direction. The impact of these three components changes along the fold's strike: the middle part is dominated by shortening and uplift, and deformation neighboring the fold tip involves not only short...

Results are reported from a search for the anomalous production of highly boosted Z bosons with large transverse momentum and decaying to . Such Z bosons may be produced in the decays of new heavy particles. The search uses pp collision data at , corresponding to an integrated luminosity of recorded with the CMS detector. The shape of the observed...

The resonance demodulation is an important method in rolling bearing fault feature extraction and fault diagnosis. But the traditional resonance demodulation method needs to select proper parameters of a band-pass filter(center-frequency and band-width), it has many shortcomings, such as, uncertainty and limitation. Here, the fast computation of a...

Acoustic field on one side of the holographic plane is required to be free in application of STFT based near-field acoustical holography (NAH) and statistically optimal NAH (SONAH). To overcome this limitation, acoustic field separation technique with single holographic plane based on wave superposition algorithm (WSA) and SONAH was proposed. WSA w...

Bearing fault characteristic frequencies contain very little energy when the early fault occurs, and they are usually overwhelmed in noise. It is difficult to find them in their frequency spectra with the second order cyclic statistics analysis. To overcome this difficulty, the cyclic bispectrum (CBS) based on the third order cyclic cumulants was p...

In signal processing, existing conventional indicators, such as, kurtosis, peak, margin, spectral kurtosis and other factors are usually very sensitive to accidental singularity of signal data, it is easy to lead to false judgments in bearing condition monitoring. To solve this problem, a spectral band entropy (SBE) method based on time-frequency w...

AR predict filer based Spectral kurtosis method is proposed to research the early fault diagnosis of rolling bearings. Combining the characteristic of extracting the resonance damping component of bearing fault signal which an Autoregressive (AR) predict filer holds, the early weak fault of rolling bearings are successfully detected after that the...

Bearing is one of the most important units in rotary machinery, its performance may vary significantly under different working stages. Thus it is critical to choose the most effective features for bearing performance degradation prediction. Linear Discriminant Analysis (LDA) is a useful method in finding few feature's dimensions that best discrimin...

Equipment performance degradation assessment can give effective reference to intelligent proactive maintenance to realize near-zero downtime. By carrying out the research on performance degradation assessment, the predictive maintenance for the equipment can be realized which can improve the reliability of the equipment. Kolmogorov-Smirnov test bas...

The M3D-C1 (Breslau et al 2009 Phys. Plasmas 16 092503) code is designed for performing three-dimensional nonlinear magnetohydrodynamics (MHD) calculations of a tokamak plasma that span the timescales associated with ideal and resistive stability as well as parallel and perpendicular transport. This requires a scalable fully implicit time advance w...

In this article, a new two-stage rolling piston CO2 compressor was developed. A test rig was designed to measure the performance of this compressor. Based on the measured p–V indicator diagram, the distributions of indicated power and compressor performance under various operating conditions have been analysed in detail. It is shown that the discha...

According to the research results on the fault mechanism of rolling bearings, a detailed discussion was presented on the optimal order selection of AR predicting filter when applied to denoise the process of rolling bearing's fault signal. Based on the impact decay model of rolling bearing's fault signal, an idea about order selection called entire...

Based on the simple hinge crack model, the dynamic equation of a cracked rotor with initial deflection was modelled in dimensionless form, which can be applied to the nonlinear vibration analysis of cracked rotor with different parameters in stationary or transient state. By the aid of analytical solution, the frequency components of the cracked ro...

The vibration signals of rolling element bearings are random cyclostationary when they have faults. However, because the background noise is very heavy when the early fault occurs, it is difficult to disclose the latent periodic components successfully even using the second order cyclostationary analysis. To overcome this difficulty, the cyclic bis...

Monocyte-based gene therapies in cancer have been hampered by either the resistance of these cells to non-viral molecular delivery methods or their poor trafficking to the tumor site after their ex vivo manipulations. Magnetic nanoparticles (MNP)-loaded genetically engineered monocytes can efficiently delivered to tumor site by external magnetic field...

Low-intensity pulsed ultrasound (LIPUS) was shown to enhance the growth of human mesenchymal stem cells. In this work, we evaluated the effect of LIPUS stimulation on the viability, proliferation and differentiation of hematopoietic stem/progenitor cells (HSPC) from fresh and cryopreserved peripheral blood leukapheresis product (LP), as well as cor...

This paper presents a novel multichannel fusion approach based on coupled hidden Markov models (CHMMs) for rolling element bearing fault diagnosis. Different from a hidden Markov model (HMM), a CHMM contains multiple state sequences and observation sequences, and hence has powerful potential for multichannel fusion. In this study, a two-chain CHMM...

The chemokine stromal cell-derived factor (SDF)-1α/CXCL12 and its receptor CXC chemokine receptor 4 (CXCR4) play a crucial role in the homing/engraftment and retention of hematopoietic stem/progenitor cells (HSPCs) in the bone marrow. It has been shown using the viral gene transfer technique that CXCR4 overexpression on human CD34(+) HSPC significa...

The vibration signals of rolling element bearings are random cyclostationary when they have faults. Also, statistical properties of the signals change periodically with time. The accurate analysis of time-varying signals is an essential pre-requisite for the fault diagnosis and hence safe operation of rolling element bearings. The Wigner distributi...

In the northwestern India-Eurasia collision zone, the northern margin of the Pamirs has indented northward by ~300 km during the late Cenozoic, accommodated by south-dipping intracontinental subduction along the Main Pamir Thrust (MPT) and the Pamir Frontal Thrust (PFT) coupled to sinistral slip on the western margin and dextral slip along the Kash...

An impact energy model (IEM) is proposed for the research of nonlinear rub-impact assessment in this paper. According to the characteristic of the model, IEM index is given to evaluate the severity or probability of rub-impact fault. We investigate the trend of variation of IEM index response to the rotation speed ratio Ω under the condition of dif...

We present results of using M3D-C^1 [1] to perform 3D nonlinear magnetohydrodynamics calculations of a tokamak plasma that span the timescales associated with ideal and resistive stability as well as parallel and perpendicular transport. We specify the transport coefficients and apply a ``current controller'' that adjusts the boundary loop-voltage...

Performance degradation assessment has emerged to realize equipment’s near-zero downtime and maximum productivity. Exploring effective indices is crucial for it. In this study, taking rolling element bearing as a research object, cyclic energy indicator is proposed for its performance degradation assessment. The proposed cyclic energy indicator is...

It is important to assess the performance degradation degree of bearings in rotating machinery for making maintenance plans and preventing unexpected defects and breakdowns during operation. A novel bearing performance degradation assessment methodology was presented based on wavelet packet transform (WPT) and hidden Markov models (HMMs). The WPT w...

Current treatments that are efficient in controlling effector T cell responses to allografts have limited efficacy on the accelerated rejection mediated by memory T cells. Effective targeting of alloreactive memory T cells may therefore be explored to improve therapeutic approaches towards solving this problem. In this study, we investigated the sy...

The western Tarim Basin is a convergent zone of the Southwestern Tianshan and the Pamir,and there have been big debates about its exact boundary. However,in the Mayikake Basin,the boundaries of two tectonic systems are very clear; the north-vergent Pamir Front Thrust is the leading edge of the Pamir,and south-vergent thrust at south limb of the Wul...

Locating at eastern end of the Pamir Front Thrust( PFT) ,the Mushi anticline grows initiating from early-Pleistocene till now. The anticline,with a gentle south limb and steep north limb,outcrops Pliocene Atushi formation and lower-Pleistocene Xiyu formation. Topographic profiles and drainage pattern indicate the lateral growth of the anticline fro...

The Mushi anticline locates at the frontier Pamir arcuate nappe tectonics belt(PFT) , which is a detachment fold with a gentle south limb and steep north limb,and its earth crust minimum shortening is ∼0. 7km with uplift up to 1. 5km. The north limb fault of Mushi anticline is composed of a series of obsequent slope fault scarps,and the distributio...

Memory cells are currently thought to be a major barrier to tolerance induction in transplantation. However, whether alloreactive memory cells resulting from a primary transplant have cross-reactivity in a second transplant is unclear. Here, we used skin transplantation from BALB/c mice donors to presensitize C₅₇ BL/6 (B6) mice. One month later, se...

A coplanar waveguide(CPW) fed sleeve antenna which supports multiband applications is proposed. The central feeder line and the ground plane of the CPW are designed to be gradually changed in structure. Open sleeve structure and an inverted-L strip are adopted in the proposed antenna which broader the bandwidth to a great extent. Compared with ante...

The Pamir salient defines the northwestern end of the Himalayan-Tibetan orogen and has overthrust the Tajik-Tarim basin to the north by ~300km along a late Cenozoic, south-dipping intracontinental subduction zone (Burtman and Molnar, 1993). The Quaternary deformation of the salient are concentrated on the outer margins: the sinistral Darvaz fault o...

In active orogens, intermontane basins commonly form adjacent to areas of uplift. The Bieertuokuoyi Basin is an intermontane basin in a rapidly deforming region of NW China. The basin, located in the hanging wall of the Pamir Frontal Thrust, was formed in response to uplift and slip on two major faults: the Pamir Frontal Thrust, located ~12 km to t...

Optimization of islet transplantation protocols is necessary for improved success of treatment for type 1 diabetes. Here, we investigated whether the size of islets transplanted into the portal vein (PV) of the liver can affect engraftment in the early post-transplantation in an experimental mouse model. Small (average diameter < 250 μm, group A) o...

One class of tearing modes in the National Spherical Torus eXperiment (NSTX) occurs without any evidence of the usual triggering modes. Using several components of the SWIM framework [1], we have performed extensive linear and nonlinear MHD and hybrid MHD-kinetic analyses showing that these may be accounted for by a non-resonant mode with toroidal...

The article does a research on the order selection of the autoregressive (AR) model for the rolling element bearings. First, the model of the signal that matches the one introduced by McFadden is considered. To clearly describe it, here it is called the resonance damping model. It is shown that the impulses generated by a fault will cause structure...

Although various approaches have been proposed by researchers and engineers for fault diagnosis of rolling element bearings, it's still a great challenge to detect bearings' faults under low signal to noise ratio (SNR) or at the early stage of faults development. Signal complexity analysis method is proposed in this paper based on matching pursuit...

A method based on cyclic Wiener filter and envelop spectrum analysis is proposed. The original signal is duplicated and shifted in the frequency domain by amounts corresponding to the cyclic frequency. The noise components are optimal filtered by a filter-bank, the filtered signal is analyzed by envelop spectrum. Then the most impulsive part is eff...

This study systematically investigates the long-term prediction of online, real-time variable-bit-rate (VBR) video traffic, which is a key and complicated component of advanced predictive dynamic bandwidth control for future networks such as multimedia satellite networks. As per the time variation, non-linearity and long-range dependence in the VBR...

Previous brain imaging studies have demonstrated that perceptual learning could enhance the representation of visual features in human early visual cortex. In this study, we used functional magnetic resonance imaging (fMRI) to investigate how perceptual learning could change the representation of face view in human visual system. We trained subject...

Adaptation to a visual pattern could alter the sensitivities of neuronal populations encoding the pattern, which usually results in a visual aftereffect. However, the function role of visual adaptation is still equivocal and its relation to visual aftereffect is largely unknown. In this study, we took advantage of face view adaptation to investigat...

Donor-reactive memory T cells present a special hurdle in transplantation. Although hematopoietic chimerism is effective for inducing donor-specific tolerance, the effects on memory T cells are unclear. Here, we induced stable chimerism and tolerance in mice (Tolerance group, n = 6) by donor-specific transfusion (DST) plus anti-CD154 monoclonal ant...

Donor-reactive memory T cells present a special hurdle in transplantation. Although hematopoietic chimerism is effective for inducing donor-specific tolerance, the effects on memory T cells are unclear. Here, we induced stable chimerism and tolerance in mice (Tolerance group, n = 6) by donor-specific transfusion (DST) plus anti-CD154 monoclonal ant...

A coplanar waveguide (CPW) feed multiband combinational structure antenna with open sleeve structure is proposed. Radiator is combined by three parts in which the first part is fed by central feeder line directly, and the other two parts are fed by electromagnetic coupling through slots. This structure helps broaden the bandwidth in a great extent....

Based on the theories of second-order cyclostationarity, cyclic energy indicator(CEI) is proposed for damage extent identification of rolling element bearings. The proposed CEI is based on cyclic coherence analysis of signals and its variation with damage extents of rolling element bearing is verified through simulation and seeded fault experimenta...

A novel broadband omni-directional circular patch antenna is proposed to substitute for a broadband monopole antenna for its proverbial advantages. Considering the inherent narrow bandwidth of conventional microstrip patch antennas, electromagnetic coupling feed technology, shorting pins and matching network designed by means of genetic algorithm (...

We have previously shown that costimulation blockade using a combination of monoclonal antibodies (mAbs) - CTLA4Ig, antibodies to CD154, LFA-1, and OX40L - can induce tolerance of cardiac allografts in mice with adoptively transferred CD4(+) memory T cells [1]. However, the effect of costimulatory blockade in secondary allograft rejection has not b...

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

A novel improved loaded open sleeve antenna is proposed for broadband application in UHF/VHF. This proposed open sleeve antenna has symmetry distribution of the parasitic elements which can commendably solve the problem of horizontal pattern asymmetry of conventional open sleeve antenna. Top loading technology is adopted simultaneously which minimi...

A broadband circularly polarized (CP) irregular slot antenna with a parasitic slot is proposed. Irregular slot formed by triangles, rectangles and a circle is adopted to achieve both broadband and circularly polarized characteristics. Meanwhile, an accessional slot is cut at proper position to help broadening the bandwidth. A simple 50Ω microstrip...

Spectral Kurtosis (SK) is an algorithm which gives an indication of how the kurtosis varies with frequency. A frequency band which contains abundant information especially the impact signal can be tracked by calculating SK. It helps to design an optimal band-pass filter to extract the most impulsive part of a signal. We applied this algorithm to th...

A broadband circularly polarized (CP) combinatorial slot antenna is proposed. Irregular slot combined with rectangles and semicircles is adopted to achieve both broadband and circularly polarized characteristics. Meanwhile, an accessorial slot is cut at proper position to broaden the bandwidth. A simple 50Ω microstrip line is used to excite this co...

The 12 May 2008 Wenchuan Earthquake (Mw 7.9) ruptured the Longmen Shan margin of the eastern Tibetan plateau, produced a 240-km-long surface rupture along the Beichuan fault and an additional 72-km-long surface rupture along the Pengguan fault (Xu et al., 2009). The results of the field mapping and relocated aftershock study yield a clear picture o...

The Tian Shan in NW China is one of the most active regions of intracontinental deformation in the world, accommodating a large fraction (~40%) of the shortening from the Indo-Eurasian collision. The western Tarim Basin, situated between the southern Tian Shan and Pamir Mountains, manifests this deformation through a series of east-west trending fa...

A novel RFID reader antenna for 910–915 MHz is proposed. The antenna is microstrip array configuration, which mainly consists of three elements rectangular radiation patches and several coplanar parasitic elements. The parasitic elements could broaden impedance bandwidth in the limited substrate thickness and rectify the resonant frequency well. In...

Bearing performance degradation assessment is more effective than fault diagnosis to realize condition-based maintenance. In this article, a hybrid model is proposed for it based on a support vector data description (SVDD) and fuzzy c-means (FCM). SVDD, which holds excellent robustness to outliers, is used to obtain the clustering centre of normal...

The M3D-C^1 code is a two-fluid toroidal magnetohydrodynamic code based on high-order, compact finite elements with C^1 continuity on an unstructured adaptive triangle-based grid. The code is built upon and extends many of the favorable features of the M3D approach to solving the MHD equations in a highly magnetized toroidal plasma. The vector fiel...

In order to overcome the limitation of traditional near-field acoustical holography (NAH), that the sound field on one side of the holographic surface must be free, a sound field separation technique based on single holographic surface and wave superposition method (WSM) is proposed. According to the WSM, the field on and near the measurement surfa...

Abtract: The Integrated Plasma Simulator (IPS) provides a framework within which some of the most advanced, massively-parallel fusion modeling codes can be interoperated to provide a detailed picture of the multi-physics processes involved in fusion experiments. The presentation will cover four topics: 1) recent improvements to the IPS, 2) applicat...

Autologous hematopoietic stem cell transplantation (HSCT) has recently become a novel therapy for patients with new-onset type 1 diabetes (T1D). However, the optimal time points for HSCT are still unknown. By using multiple low-dose streptozotocin (STZ)-induced T1D mice models, we performed syngeneic bone marrow transplantation (syn-BMT) in diabeti...

A matching pursuit based feature extraction method of gears vibration was presented. According to simulation, this method verifies its advantages compared with the traditional time-frequency analysis methods, such as short time fourier transform. Matching pursuit method was applied to actual gears fault diagnosis. The results show that this method...

A feature reduction method based on wavelet kernel-PCA (WKPCA) is presented. Mexican hat wavelet kernel is introduced to enhance nonlinear mapping capability of kernel-PCA. The experimental data sets of rotor operating under four conditions: normal, oil whirling, rub and unbalance are used to test the WKPCA method. The feature reduction results of...

Performance degradation assessment has been proposed to realize equipment's near-zero downtime and maximum productivity. Exploring effective indices is crucial for it. In this study, rolling element bearing has been taken as a research object, spectral entropy is proposed to be as a complementary index for its performance degradation assessment, an...

Accurate axisymmetric steady-states of a comprehensive two-fluid model are calculated for plasmas in diverted NSTX and DIII-D geometries using the M3D-C^1 code [1]. It is found that gyroviscosity may have a significant effect on the flows in steady-state when a localized density source is present. The model implemented in M3D-C^1 self-consistently...

The M3D-C^1 code is a two-fluid toroidal magnetohydrodynamic code based on high-order, compact finite elements with C^1 continuity on an unstructured adaptive triangle-based grid. The code is built upon many of the favorable features of the M3D approach to solving the MHD equations in a highly magnetized toroidal plasma. The vector fields use a phy...

Based on the M 2-parameter of Hermite-Gaussian beam, we deduced the matrix formulation of the beam quality for nonsymmetric two-dimensional Hermite-Gaussian beam, which at an arbitrary azimyth angle α. And coupled beam radius square, coupled M 2-parameter also have been introduced. The beam radius versus azimuth angle α at different positions has b...

A broadband planar antenna fed by coplanar waveguide (CPW) with gradually changed central feeder line is proposed. Central feeder line of the CPW and the ground plane are designed to be graded structure, which endow the proposed antenna with better impedance matching characteristic and broader bandwidth than microstrip line (MSL) fed antenna. Compa...

A novel RFID reader antenna is designed for UHF band. The proposed antenna consists of double-layer two elements rectangular patches and impedance tuning stub. The lower-layer patches are the chief radiation elements. The upper-layer patches could perfectly improve impedance matching and broaden impedance bandwidth. Meanwhile, the antenna adopts se...

Torque ripple in an electric power steering (EPS) system can be induced by the phase lag between steer angle and rack displacement, non-linear friction, and disturbances from road and sensor noise, especially during high-frequency manoeuvres. This paper investigates the application of robust and non-linear sliding mode control (SMC) strategies to a...

A spectral element library has been developed and integrated with the M3D extended MHD code. The currently used linear triangular finite element implementa-tion and the new high order quadrilateral spectral element implementation are directly compared on equilibrium, linear stability, and nonlinear evolution calculations run on the same problems.

Sound field visualization is a helpful design and analysis tool for the study of sound radiation and dispersion problems. It can help to comprehend deeply about noise transmission mechanism, monitor environment noise, evaluate sound quality, and even diagnose the machinery faults based on mechanical noise. The well-known near-field acoustic hologra...

A new approach for solving the 3D MHD equations in a strongly magnetized toroidal plasma is presented which uses high-order 2D finite elements with C1 continuity. The vector fields use a physics-based decomposition. An efficient implicit time advance separates the velocity and field advance. ITAPS (SCOREC) adaptivity software and TOPS solvers are u...

In order to find out equipment performance degradation, an assessment method using geometric distance based on support vector machine was proposed. In the method, the geometric distance between the data vector and the hyperplan is used to represent the level of equipment degradation. The relationship between the geometric distance and equipment deg...

In order to reconstruct the sound field, the fast Fourier transform (FFT)-based near-field acoustical holography (NAH) demands that the measurement surface must extend to a region where the sound pressure decreases to a low level. This method is unfit for reconstructing the partial sound field in which the measurement aperture size is limited eithe...

Inactivation of the neurofibromatosis type 2 (NF2) tumor suppressor gene function has been observed not only in familial schwannomas and other central nervous system tumors, but also in malignant tumors unrelated to the NF2 syndrome, indicating a broader role of NF2 in human tumorigenesis. The NF2-encoded protein Merlin is closely related to the Ez...

To solve the problem of modeling equipment performance degradation and prediction system, a hierarchical model based on multi-Agent system was proposed. In this model, the framework of the system was designed. According to the equipment functional structure, the performance degradation and prediction Agents for each hierarchy were divided and the c...