Combined organic and inorganic fertilization can improve soil fertility in coal mine reclamation areas. However, the contribution of bacterial community (especially its occurrence patterns) to physicochemical properties enzyme activity needs further evaluation. The objective this research was clarify diversity, composition, intraspecific interactions response combined fertilizer application areas Loess Hilly Region, China. Maize rhizosphere samples were collected under four regimes (CK, no...

Microbial residual carbon is an important component in soil pool stability. Here, we tested soils collected from the early (first year, R1), middle (10 years, R10), and long-term (30 R30) stages of reclamation a coal mining area China. Two treatments with straw materials, namely maize + (S+M) wheat (S+W), were used for decomposition experiment. The glucosamine muramic acid contents assessed. Accumulation microbial C its contribution to organic (SOC) analyzed at various intervals. Straw...

This paper proposes a novel approach to reducing the size of FPGA reconfiguration bits reams by fixing appropriate orders for LUT inputs. With such input orders, memory locations that need be altered during partial are relocated into common frames. We present problem formulation relates number frames (that downloaded FPGAs) minterms specially constructed logic function. A heuristic procedure is developed solve formulated in polynomial time. The proposed methodology validated experiments...

Programmable capacitor arrays (PCA) are frequently used in reconfigurable analog circuits. Since PCA can be programmed to numerous values, testing by exhaustively examining all values lead lengthy processes. To address this problem, we present an efficient built-in-self-testing (BIST) method for The proposed BIST takes advantage of existing programmable resources and, hence, introduces very small hardware overhead. Additionally, two simple and effective comparison techniques implementing the...

An inclined goaf caused by storage mining is a serious risk to subgrades and pavements. In this paper, effective investigation detection methods of goafs were discussed considering the project Urumqi East Ring Expressway crossing existing Zhongxing no. 2 mine. Moreover, theoretical analysis series field comparative tests, reasonable grouting parameters treatment plan obtained. By comparing test results laboratory, influence groundwater on effect was revealed reduce compressive strength...

<title>Abstract</title> Time-depth conversion is a crucial step in 3D seismic interpretation of coalfields. Fast and accurate time-depth essential for ensuring safe efficient coal production. However, conventional methods often struggle to balance accuracy with convenience, which makes it difficult achieve good application results the coalfield. To address this problem, we proposed new seam method based on machine learning velocity inversion. Firstly, high-precision time-domain layer floor...

Abstract In order to provide guidance on the design and use of Self-Powered Neutron Detector (SPND) improve measurement accuracy, accurate simulation SPND is required. Therefore, a complete package was developed, including particle transport calculation module, an electric field visualization interface data post-processing module. Due produced by space charge in insulator, Geant4 has been chosen as module iterative code for written implement insulator. To help researchers simplify process...

In this paper, we study the theory of spontaneous parametric down-conversion pumped by a short coherent pulse. It is shown that when single spatial mode filters and narrow band optical are used to filter output state down-conversion, postselected can be approximately described simple single-mode theory.

A framework that relates the size of FPGA reconfiguration data to number minterms a specially constructed function is presented. Three techniques, variable mapping optimization, circuit don't-care modification, and look-up table input permutation, are developed minimize special function. The method integrate proposed techniques into design automation flow discussed experimental results

This paper investigates techniques to minimize process-variation induced performance degradation in pipeline ADCs via circuit reconfiguration. By taking advantage of the modularity existing ADC circuits, this work introduces a configurable switch network that makes it possible move more accurate circuits preceding stages along signal processing path. The reconfiguration feature also adds online testing capabilities and enhances fault-tolerance ADCs. An implementation reconfigurable 10-bit...

This paper presents a prioritized LRU (least recently used) cache replacement circuit that directly accomplish the operation inside circuits, which significantly reduces access latency. The performance, hardware and power overheads due to incorporating operations in circuits are investigated based on 65nm CMOS technology. It shows design of has very low overhead compared conventional circuit. presented technique will lead more effective implementations benefit development high-performance...

The main targets of seismic exploration research in Leijia carbonatite tight sandstone oil area Liaohe depression are thin reservoirs prediction and minor faults identification, which is one the important representatives complex objects depression. High precision 3D has significantly improved ability identification this area. Reducing cost high through optimizing acquisition parameters very for next step development similar areas. Based on data area, multiple sub-geometries obtained with...

DMT oilfield is a typical dual-complexity area. Because of limited surface conditions, more intensive excitation mode and combination receiving method are difficult to implement in this Field tests conducted find the optimal reception factors appropriate key parameters observation system. After comparative analysis, it found that significantly increasing number coverage can effectively improve signal-to-noise ratio deep energy data, solve influence on quality data by lack vibrators single...

Abstract Based on an actual highway project traversing acute inclined shallow mined-out area in Urumqi, China, a scale physical model experiment and numerical simulation method were adopted to study the stability settlement mechanism of subgrade substrata overlying under different mining heights angles. Plastic pneumatic capsules with shapes embedded similar strata made from clay, fine sand, Vaseline simulate cavity. The capsule was removed process mining, five cases angles studied....

This paper proposes a coherent orthogonal frequency division multiplexing (OFDM) free space optical (FSO) communication system model consisting of parallel channel state information (CSI)-assisted amplify-and-forward (AF) relays over Exponential Weibull (EW) atmospheric attenuation channel. Using quadrature amplitude modulation (QAM) as subcarrier mapping mode for OFDM signals. Considering the joint effects path loss, pointing errors and turbulence, closed-form expressions Meijer G form...