A validation study of the distinct lattice spring model (DLSM) for wave propagation problems is performed. DLSM is a microstructure-based numerical model, which is meshless and has advantages in modelling dynamic problems where stress wave propagation is important. To verify the applicability of DLSM to modelling wave propagation through a discontinuous medium, the virtual wave source (VWS) met...

LSM-tree has been widely used in cloud computing systems by Google, Facebook, and Amazon, to achieve high performance for write-intensive workloads. However, in LSMtree, random key-value queries can experience long latency and low throughput due to the interference from the compaction, a basic operation in the algorithm, to caching. LSM-tree relies on frequent compaction operations to merge dat...

Least squares migration (LSM) is a linearized waveform inversion for estimating a subsurface reflectivity model that, relative to conventional migration, offers improved spatial resolution of migration images. The cost, however, is that LSM typically requires 10 or more iterations, which is about 20 times or more the CPU cost of conventional migration. To alleviate this expense, I present a deb...

In this work, the distinct lattice spring model (DLSM) is further developed for handling practical geotechnical problems. The Zienkiewicz-Pande (ZP) constitutive implemented into DLSM a better prediction of soil plasticity. beam finite element introduced to simulate supporting structures. birth–death particle method multistage construction. accuracy and stability enriched are verified against b...

A 3D distinct lattice spring model (DLSM) is proposed where matter is discretized into individual particles linked by springs. The presented model is different from the conventional lattice spring models where a shear spring is introduced to model the multibody force by evaluating the spring deformation from the local strain rather than the particle displacement. By doing this, the proposed mod...

A two-phase DLSM model is proposed to model transverse isotropic materials, in which the layer structure of the anisotropic materials is explicitly represented. Equations are derived to obtain elastic parameters of the two phase model from the elastic modules in parallel to the bedding planes and that in normal direction of the bedding planes. Then, the mechanical properties of the two-phase DL...

It is necessary to take into account the micro discretization of natural rock when studying its macroscopic failure behavior. This requirement has resulted in renewed and increased interest in the discrete or framework/lattice numerical modeling techniques. However, to fully construct a numerical model for practical applications using a discrete numerical model is computationally difficult with...

This presented article deals with the issue of VDWS and DLSM communication protocols, that are used for remote reading of intelligent electrometers for smart metering. This article analyzes the real data communication from the distribution networkof CEZ, a.s., one of the biggiest elektricity distributor in EU. Based on the analyzed data the authors then introduce their recommendations and the d...

The Financial Services Authority (OJK) is a public institution that has statutory mandate to regulate and oversee the financial services sector protect consumers. At present time, experiencing positive developments so OJK also supporting this function by providing human resources. So there an increase in staff at resulting workload Directorate of Human Resources Management (DLSM) which managing...

a meshless method namely, discrete least square method (dlsm), is presented in the paper for the solution of free surface seepage problem. in this method computational domain is discredited by some nodes and then the set of simultaneous equations are built using moving least square (mls) shape functions and least square technique. the proposed method does not need any background mesh therefore ...