Measurement and Control System of Self-propelled Levelling Machine Based on Inclination Sensor and Laser

The measurement and control system of the self-propelled levelling machine adopts the software and hardware composing and the control mode based on inclination sensor and laser emitter. The system adopts the inclination sensor and laser emitter as the datum signal to form the datum plane. The separate time treatment avoids simultaneously adjusting inclination and laser signal to each other interfere. The hydraulic servo system controls the levelling part to work on the plane that parallels with the datum plane. The test result shows the measurement and control system satisfy with the request of the self-propelled levelling machine

Study of Tractor AMT Automatic Gear Shift Based on Artificial Neural Network

The paper aims at the complex situation of the tractor field operation and adopts the gear shift rule of two parameters to control the six gear shift of the tractor. Using the artificial neural network chip the model number of which is ZISC036 and the computer on slice the model number of which is PIC17C42 establishes the controller of the radial basis function artificial neural network-RBFANN. Based on the optimal gear shift information emitted by the RBFANN controller, PIC17C4 emits the control command to control the hydraulic system to realize the automatic gear shift according to the predetermined rule. The sample data is simulated by MATLAB. It shows that RBFANN identification system can solve the problem of the gear recognition and the gear position can be accurately identified. The paper offers the theoretical basic for the design and study of the tractor AMT automatic gear shift

Physical simulation and quantitative calculation of increased feldspar dissolution pores in deep reservoirs

The physical simulation of diagenesis was conducted for the Cretaceous Bashijiqike Formation deep sandstone reservoir in Kelasu structural belt of Kuqa Depression, Tarim Basin, and the dissolution rate and increased dissolution pores of feldspar matrix grains in such reservoirs were quantitatively calculated in the process from long-term shallow burial in early stage to quick deep burial in late stage. Through the field emission large-area SEM analysis, the dissolution rate and increased dissolution pores of feldspar matrix grains in core samples taken from Dabei and Keshen areas were quantitatively calculated. After the experimental data and the actual core data were cross-checked, the evolution model was established for increased feldspar dissolution pores in deep continental reservoirs with high content of feldspar matrix grains. According to the calculation results, the maximum increased feldspar dissolution pores in Keshen area during the process from long-term shallow burial in early stage to quick deep burial in late stage is by 0.86%−2.05%. The simulated sandstone reservoir with burial depth of more than 7 000 m reveals a larger quantity of increased feldspar dissolution pores, with the absolute error value of 0.23% after calibration. In Dabei area, calcite is the primary contributor to secondary dissolution pores, followed by feldspar. Quantitative calculation shows the maximum increased feldspar dissolution pores in Dabei area to be by 0.62%−1.48%. Similarly, the simulated sandstone reservoir with burial depth of more than 7 000 m reveals a larger quantity of increased feldspar dissolution pores, with the absolute error value of 0.15% after calibration. There are two causes of the experiment errors: One cause is that the simulation experiment uses ideal conditions and the simulation reservoirs are homogeneous; Another one is that deep reservoirs have strong heterogeneity and there are big differences in the dissolution within different areas. Key words: Kuqa Depression, deep reservoir, feldspar dissolution, increased dissolution pore, physical simulation of diagenesi

Capacity optimization configuration of live gas storage system in independent power systems

As the energy demand and the continuous improvement of environmental performance continuous grow, the use of Independent Power Systems (IPS) is becoming increasingly common. Energy storage facilities not only achieve reliable power supply through IPS, but also face the problem of how to achieve more efficient and energy-saving. Therefore, this paper chose to establish a charged gas storage system (GSS for short here) of an independent power system to establish the mathematical model of the GSS through the Linear programming model, including the energy balance equation of the GSS and the load balance equation of the power system. It then used genetic algorithm (GA) to optimize the capacity of the GSS and obtained the optimal capacity configuration plan. In the simulation experiment analysis of a live GSS in view of GA for capacity optimization configuration, the live GSS proposed in this paper outperformed traditional GSS and battery GSS in terms of performance, power load, energy conversion, and capacity configuration. In terms of power load, the six indexes of regulation capacity, response speed, stability, discharge efficiency, power density and energy storage capacity are compared. Among them, the system capacity designed in this paper is 90, 83, 97, 83 and 90 % respectively, which are much higher than the other two. Among them, the six dimensional power load capacity was outstanding, and the energy conversion efficiency was also around 80 %. The capacity configuration was distributed between 85 and 94. This article proposed a design scheme for an electrified GSS based on GA for capacity optimization configuration, which can better meet the needs of independent power systems and improve their reliability and stability

Epidemiology of carbapenem-resistant Klebsiella pneumoniae bloodstream infections after renal transplantation from donation after cardiac death in a Chinese hospital: a case series analysis

Abstract Background Although the high mortality rates have been extensively reported worldwide, few studies have investigated the epidemiology of CRKP-BSIs in the early stage after kidney transplantation (KTx) from donation after cardiac death (DCD). We sought to describe the epidemiological and clinical characteristics of cases of carbapenem resistant Klebsiella pneumoniae bloodstream infections (CRKP-BSIs) in kidney transplantation recipients (KTRs) from DCD in our hospital. Methods A retrospective analysis of clinical data of CRKP-BSIs in KTRs admitted to a Chinese hospital in Beijing, China, between January 1, 2012 and December 31, 2016 was performed. The annual percentage of patients with CRKP, the annual number of total KTRs and KTRs from DCD were determined. The genetic relatedness of the strains was determined by polymerase chain reaction and pulse field gel electrophoresis (PFGE). Results During the study period, there were total 947 KTRs in our hospital, including 275 KTRs from DCD. Five incidences of CRKP-BSIs in KTRs were identified, and two of them (Case 1,3) from the same foreign hospital. The incidence of CRKP-BSIs in the early stage (within 3 months) following kidney transplantation (KTx) from DCD was about 1.1% (3/275). In Case 1–3 and 5, the rupture of renal transplant artery was presented on the 40th, 16th, 43th and 74th day after KTx, and in Case 4, the thrombus of renal transplant artery was presented on the 13th day after KTx. Three cases (Case 1,2,5) occurring pneumothorax on the 45th, 51th and 32th day after KTx. Four cases (Case 1–4) received the excision of the transplanted kidney for the treatment. Polymerase chain reaction showed the bands for case 2 were distinctive from other cases. Pulse field gel electrophoresis showed mainly three clusters of the bands for all the isolates. Conclusions During the study period, we observed an increase in the occurrence of CRKP-BSIs among KTRs from DCD in our hospital. We demonstrated that rupture/thrombus of the renal transplant artery was associated with CRKP-BSI in the early stage after KTx from DCD. Albeit the low incidence of CRKP-BSI (1.1%) after KTx from DCD, the high mortality (4/5) had been observed from the prognosis of the patients. Thorough surveillance of DCD donors, early identification of CRKP-BSI, necessary preventative measurements and use of appropriate treatments should be the strategy for CRKP-BSI in the early stage after KTx from DCD

Additional file 3: of Epidemiology of carbapenem-resistant Klebsiella pneumoniae bloodstream infections after renal transplantation from donation after cardiac death in a Chinese hospital: a case series analysis

Table S4. Analysis of clinical characteristics of 5 kidney recipients infected with Klebsiella pneumoniae carbapenem resistant K. pneumoniae. (XLSX 12 kb

Additional file 2: of Epidemiology of carbapenem-resistant Klebsiella pneumoniae bloodstream infections after renal transplantation from donation after cardiac death in a Chinese hospital: a case series analysis

Table S2. Summary of carbapenem-resistant Klebsiella pneumoniae (CR-KP) isolation site, episodes of sepsis, antibiotic treatments adopted, outcome, excision of transplanted kidney and cause of death. (XLSX 9 kb

Additional file 4: of Epidemiology of carbapenem-resistant Klebsiella pneumoniae bloodstream infections after renal transplantation from donation after cardiac death in a Chinese hospital: a case series analysis

Table S3. Antibiotic susceptibility of 5 stains of carbapenem-resistant K. pneumoniae isolated from first bloodstream infections in kidney transplant recipients. (XLSX 9 kb

Additional file 1: of Epidemiology of carbapenem-resistant Klebsiella pneumoniae bloodstream infections after renal transplantation from donation after cardiac death in a Chinese hospital: a case series analysis

Table S1. Demographic characteristics and utilization of immunosuppression drugs of patients following renal transplantation. (XLSX 10 kb