Dual Pump Research Articles

Dual Side Water Pumping System using Scotch Yoke Mechanism

The aim of the paper is to design and develop a dual side water pumping system using scotch yoke mechanism. The reciprocating motion of the plunger is utilized for the pumping action. The plunger is reciprocated with the help of a cam plate. By this action the water is pumped with very high pressure and to various heads. This can be utilized for various applications like lubrication in machines and water pumping in agriculture field. The cam plate gets the drive from the motor for its rotation and converts that rotary motion to useful dual side reciprocating motion. The motor is powered with the aid of electric power. Thus the water is pumped from source to various heads.

Design of Multi-time Programmable Memory for PMICs

In this paper, a multi-time programmable (MTP) cell based on a 0.18 μm bipolar-CMOS-DMOS backbone process that can be written into by using dual pumping voltages — VPP (boosted voltage) and VNN (negative voltage) — is used to design MTP memories without high voltage devices. The used MTP cell consists of a control gate (CG) capacitor, a TG_SENSE transistor, and a select transistor. To reduce the MTP cell size, the tunnel gate (TG) oxide and sense transistor are merged into a single TG_SENSE transistor; only two p-wells are used — one for the TG_SENSE and sense transistors and the other for the CG capacitor; moreover, only one deep n-well is used for the 256-bit MTP cell array. In addition, a three-stage voltage level translator, a VNN charge pump, and a VNN precharge circuit are newly proposed to secure the reliability of 5 V devices. Also, a dual memory structure, which is separated into a designer memory area of and a user memory area of , is newly proposed in this paper.

P158: Metabolic profiling of bile juice from the patients with cholangiocarcinoma-associated diseases

Background Opisthorchiasis is a form of foodborne trematodiasis which is caused by liver flukes. It has been shown that a chronic Opisthorchiasis infection increases a risk of cholagiocarcinoma of liver. It is commonly believed that a gradual change of homeostasis in a parasite microenvironment (bile) leads to liver fluke-induced cancer. Nevertheless, no systematic, analytically driven studies confirming this hypothesis have been published yet. The restricted access to clinical material and extreme complexity of the biological matrix (bile) both are the important “rate limiting factors” for a progress in the field. Here we present for the first time a cross-platform mass spectrometric analysis of bile juice collected from the patients with cholangiocarcinoma-associated diseases. We show that an effective analysis of such complex biological matrix as bile juice requires a combination of orthogonal analytical platforms (e.g. RPLC–MS and HILIC–MS) maximizing coverage of the metabolic space. Materials and methods 28 patients with O. felineus infection and 30 negative controls were included in the study. The infection status was confirmed using microscopy analysis of the bile. Bile samples were collected from the gallbladder using sterile puncture, directly frozen and stored at −80 °C until analysis. The samples were randomized and organized into the acquisition blocks consisting of the samples and quality controls (QC). Experiments were carried out with a Dionex Ultimate 3000 LC system (Thermo Scientific/Dionex, The Netherlands) equipped with a Dual Gradient Separation pump allowing for parallel LC analysis, and hyphenated to an Impact UHR-qTOF mass analyzer (Bruker Daltonics, Germany). Reversed-phase experiments (RPLC) were performed with an UHPLC BEH Shield RP18 column 100 × 2.1 mm, 1.7 μm (Waters) and HILIC experiments with a Luna HILIC column (Phenomenex, The Netherlands) of 100 × 2.00 mm, 3 μ m. RPLC data were acquired in ESI positive mode and HILIC in negative mode, respectively. The data acquisition rate was set to 1 Hz over a mass range of m / z 50–1000. The LC–MS data files were aligned by using the in-house developed alignment algorithm MS-Align 2 tool ( www.ms-utils.org/msalign2 ). Results After the data prepressing, which includes alignment, noise filtering and peak picking two data matrixes costing of 412 features (metabolites) for RPLC and 428 ones for HILIC were generated. To evaluate a degree of similarity between the two data matrixes the RV coefficient (a multivariate extension of correlation coefficient) was used. The coefficient has flattened at 0.58 showing that despite a strong overlap between the datasets there is a substantial number of the “platform specific” metabolites. Those structures will certainly be missed if a single platform strategy is applied. Conclusion Here we present for the first time a cross-platform mass spectrometric analysis of bile juice collected from the patients cholangiocarcinoma-associated diseases. We show that a combination of the two platforms greatly improves the coverage of the metabolome and as such should be a firstchoice for exploratory studies of the complex biological matrixes. Work was conducted with the application of the Tomsk regional common use center technical equipment acquired thanks to a grant of the Russian Ministry of the Agreement No. 14.594.21.0001 (RFMEFI59414X0001). This project is supported by “The Tomsk State University Academic D.I. Mendeleev Fund Program” under Grant (No. 18.1.52.2015).

Practical Design Calculations for Groundwater and Soil RemediationPractical Design Calculations for Groundwater and Soil Remediation, second edition. KuoJeff. CRS Press/Balkema, Leiden, 2014, £82.00 (hardback) or £57.40 (e-book), 304 pp., ISBN: 978-1-4665-8523-2 (hardback) or 978-0-203-49099-0 (e-book)

new edition has updates throughout the text, and it presents all new material on air sparging, dual phase extraction, chemical oxidation, and vacuum pumps, as well as several new practical examples. It illustrates the engineering calculations needed during site assessment and remedial investigations. It also shows readers how to estimate the rates of groundwater movement and plume migration. This book provides important design calculations for vadose zone soil remediation as well as groundwater remediation--

OIL CONTAMINATION PROPAGATION PATTERNS IN SOILS AND EFFICIENCY EVALUATION OF PUMPING IN-SITU REMEDIATION METHOD

In recent decades, attention to contamination propagation into soils and underground water has increased, which has led to a rise in the studies on soil contamination problems and methods of in-situ remediation. In this research, effective parameters on oil contamination propagation in soils and underground water have been investigated using FEM in order to determine propagation patterns. The main parameters are soil permeability, relative density of contamination and ground water table depth. Furthermore, the efficiency of pumping method as an in-situ remediation approach for contaminated soils has been examined. The results show there are different propagation patterns in coarse and fine grain soils and the higher efficiency of dual symmetric pumping approach for in-situ remediation.

Optimisation of CT pulmonary angiography by applying cardiac CT techniques

Purpose – To reduce effective dose to patients by reducing dose length product (DLP) – To reduce intravenous contrast volume used for computed tomography pulmonary angiography (CTPA) studies – To improve image quality via increased pulmonary arterial enhancement (HU) Methods and materials Twenty-three patients with justified CTPA requests were randomly assigned to study group according to availability of supervising radiologist(s). Twenty-three further consecutive patients who underwent standard protocol CTPA examination were retrospectively assigned to control group during study period. Tube voltage was modified as per body mass index (BMI). Z-axis scan range was limited from lower margin of sternoclavicular joint to upper margin of lowest diaphragm. High flow fixed volume dual pump technique was used with breath hold. Images were acquired using 64 slice Phillips Brilliance CT scanner. Pulmonary arterial opacification was measured at centre of pulmonary trunk and first segmental lower lobar branch. Results All scans were of adequate diagnostic quality. The study group saw reductions in mean DLP of 21% (296.1 milliGray-centimetre [mGy-cm] vs 374.4 mGy-cm), intravenous contrast volume administered of 23% (60 millilitres [mls] vs 78mls). Mean pulmonary arterial opacification was improved by 49% (470 HU vs 316 HU) and mean segmental arterial opacification by 55% (471 HU vs 304 HU) over control group. Conclusion Reduction in CTPA radiation dose and intravenous contrast volume can be achieved by using established cardiac CT techniques while improving image quality at the same time. – To reduce effective dose to patients by reducing dose length product (DLP) – To reduce intravenous contrast volume used for computed tomography pulmonary angiography (CTPA) studies – To improve image quality via increased pulmonary arterial enhancement (HU) Twenty-three patients with justified CTPA requests were randomly assigned to study group according to availability of supervising radiologist(s). Twenty-three further consecutive patients who underwent standard protocol CTPA examination were retrospectively assigned to control group during study period. Tube voltage was modified as per body mass index (BMI). Z-axis scan range was limited from lower margin of sternoclavicular joint to upper margin of lowest diaphragm. High flow fixed volume dual pump technique was used with breath hold. Images were acquired using 64 slice Phillips Brilliance CT scanner. Pulmonary arterial opacification was measured at centre of pulmonary trunk and first segmental lower lobar branch. All scans were of adequate diagnostic quality. The study group saw reductions in mean DLP of 21% (296.1 milliGray-centimetre [mGy-cm] vs 374.4 mGy-cm), intravenous contrast volume administered of 23% (60 millilitres [mls] vs 78mls). Mean pulmonary arterial opacification was improved by 49% (470 HU vs 316 HU) and mean segmental arterial opacification by 55% (471 HU vs 304 HU) over control group. Reduction in CTPA radiation dose and intravenous contrast volume can be achieved by using established cardiac CT techniques while improving image quality at the same time.

Numerical Simulation of a Residential House Coupled with a Dual Source Heat Pump System

With the information technology revolution and the improving requirement for indoor air environment, energy consumption for air conditioning is increasing in Tunisia. In this research, a heating a residential house using the abundant and universal sources is proposed for a residential house in Tunisia. The effect of the incidence solar radiation in the coupling of a residential house and a heat pump system in all direction of this zone during the winter has been added. The effect of ON-OFF technology in the level of the evaporator during the winter has been studied. We present a mathematical description of the house on TRNSYS, as well as the numerical results of the simulation of coupling of the several components. The incidence solar radiation, the temperature distribution and the energy consumed and delivered, and its impact on air-conditioning load in rooms have been measured using the Tunisian climate. Numerical results have been obtained for 24h in January and 4500h operation in winter. Results show that the system may be satisfactorily used for residential building or greenhouse heating in the Mediterranean and region of Tunisia.

Numerical Simulation of a Residential House Coupled with a Dual Source Heat Pump System

With the information technology revolution and the improving requirement for indoor air environment, energy consumption for air conditioning is increasing in Tunisia. In this research, a heating a residential house using the abundant and universal sources is proposed for a residential house in Tunisia. The effect of the incidence solar radiation in the coupling of a residential house and a heat pump system in all direction of this zone during the winter has been added. The effect of ON-OFF technology in the level of the evaporator during the winter has been studied. We present a mathematical description of the house on TRNSYS, as well as the numerical results of the simulation of coupling of the several components. The incidence solar radiation, the temperature distribution and the energy consumed and delivered, and its impact on air-conditioning load in rooms have been measured using the Tunisian climate. Numerical results have been obtained for 24h in January and 4500h operation in winter. Results show that the system may be satisfactorily used for residential building or greenhouse heating in the Mediterranean and region of Tunisia.

Numerical Simulation of a Residential House Coupled with a Dual Source Heat Pump System

With the information technology revolution and the improving requirement for indoor air environment, energy consumption for air conditioning is increasing in Tunisia. In this research, a heating a residential house using the abundant and universal sources is proposed for a residential house in Tunisia. The effect of the incidence solar radiation in the coupling of a residential house and a heat pump system in all direction of this zone during the winter has been added. The effect of ON-OFF technology in the level of the evaporator during the winter has been studied. We present a mathematical description of the house on TRNSYS, as well as the numerical results of the simulation of coupling of the several components. The incidence solar radiation, the temperature distribution and the energy consumed and delivered, and its impact on air-conditioning load in rooms have been measured using the Tunisian climate. Numerical results have been obtained for 24h in January and 4500h operation in winter. Results show that the system may be satisfactorily used for residential building or greenhouse heating in the Mediterranean and region of Tunisia.

Multi-Format Wavelength Conversion Using Quantum Dash Mode-Locked Laser Pumps

We investigate and compare the performance of wavelength conversion for two different non-return-to-zero (NRZ) modulation formats at 40 Gb/s: on off keying (OOK) and differential phase-shift keying (DPSK). To achieve wide wavelength coverage and integrability, we use a dual pump scheme exploiting four-wave mixing in semiconductor optical amplifiers. For phase stability, we use a quantum-dash mode-locked laser (QD-MLL) as a multi-wavelength source for the dual pumps, with tunability provided by the output filter. The significant sidelobes of the DPSK spectrum (relative to OOK) require the balancing of the pump proximity to the original signal (facilitating high conversion efficiency) with the signal degradation from the pump spectrum overlapping the converted DPSK signal. We achieve a conversion efficiency near –3.6 dB for OOK and –5.4 dB for DPSK across a 12 nm tuning range with low input powers (1 dBm). We measure bit error rate (BER) and obtain error free transmission (BER < 10−9) with a power penalty less than 2 dB for OOK and 3 dB for DPSK.

Development and performance of a dual tank solar-assisted heat pump system

Abstract A novel dual tank solar-assisted heat pump (SAHP) system configuration for domestic hot water heating was developed. Due to the multiple modes of operation arising from the configuration, it was necessary to develop a custom control strategy to minimize electricity consumption. The controller evaluates which modes of operation are possible given the current conditions and selects the best mode from those available. The system modes of operation were validated experimentally using a test apparatus built at the University of Waterloo. Annual simulations of system performance for a single-family residential home indicate that the dual tank SAHP system developed provides significant energy savings in comparison to a traditional solar domestic hot water system. Using a benchmark comparison of a standard electric domestic hot water system and a solar domestic hot water system, the dual tank SAHP increased energy savings from 60% to 69% for 7.5 m 2 solar collector area. Applying the system to a larger load offers the potential for significant energy and cost savings, which would improve economic justifiability.

All-solid-state dual end pumped Nd:YAG/LBO yellow green laser with 10.8 W output power at 561 nm

It is reported that the efficient and compact yellow green laser at 561 nm generated by intracavity frequency doubling of a continuous wave (CW) laser operation of a diode pumped Nd:YAG laser on the 4F3/2 → 4F13/2 transition operated at 1123 nm. An LBO crystal, cut for critical type I phase matching at room temperature is used for second harmonic generation of the laser. With dual end pump configurations at total incident pump power of 40 W, as high as 10.8 W of CW output power at 561 nm is achieved with 20 mm long LBO. The optical-to-optical conversion efficiency is up to 27%, and the power stability in 8 h is better than 2.56%.

Development of an ultra-high vacuum system for space cold atom clock

Space cold atom clock (SCAC) is developed for a series of experiments related to laser cooling of atoms and cold atom clock in space microgravity environment. An ultra-high vacuum (UHV) system is the key element for SCAC. This paper presents the design of the UHV system and also shows the status of an initial UHV system prototype with the design and a series of special vacuum treatments whose pressure distribution satisfies the special requirements for SCAC. A dual pumping system, including ion pump and getter, is introduced, and pressures of different positions have been calculated. Experiments have been carried out to acquire the performances of the initial prototype. It is proved that the initial prototype can not only self-sustain an equilibrium pressure for more than 2 months without power but also withstand the mechanical vibration test and space environment simulation test. Furthermore, an optimization design is used to get pressures which are much lower than the desired pressure (∼×10−8 Pa) in the interaction zone of the system has been demonstrated.

Simulation and Analysis of Air-soil Dual Source Heat Pump Energy Consumption in Cold Regions

INTRODUCTIONThis paper mainly researches the practical engineering about Simulation of air-soil heat pump system in an office building of Shenyang, China. This system in the winter uses the air source as the main heat source and soil source as the auxiliary heat source for heating, in the summer only uses the soil source heat pump to refrigerate. METHODSThis paper mainly applies DEST software and TRNSYS software to study engineering air simulated analysis of soil heat pump system and compare with a single heat source. Analyzing the energy consumption of the dual heat sources pump system and its results were compared with the single soil source heat pump system to draw a conclusion. RESULTSAnalysis of energy consumption of dual-source heat pump system in summer and winter. And energy consumption analysis of single soil source heat pump system in summer and winter. CONCLUSIONSIn terms of energy consumption, the annual energy consumption of dual heat source heat pump system is 25962.23 kWh. The annual energy consumption of single soil source heat pump system is 45573.78 kWh, saving about 43.03% of energy consumption. The superiority and development prospects of the dual heat source heat pump system is obvious and promising, in the operating cost and conservation area. This project was financially supported by the National science and technology support plan sub-topic (2011BAJ05B01-04).

Simulation and Analysis of Air-Ground Dual source Heat Pump Operating Efficiency

Based on the simulation study of air-ground dual heat source heat pump system in the actual project of an office building in Shenyang, this paper compares and analyzes the operating efficiency of dual heat source heat pump system and single heat source heat pump system in summer and winter. The target project adopts air-ground source heat pump coupling operation for heating in winter, ground-source heat pump operation for cooling in summer. Using software TRNSYS, two heat pump systems simulation models are established respectively. Through simulating the hourly changes of the heat pump COP, analyzing the results of system operation, the feasibility of the system is discussed. Based on the series of work, a conclusion can be drawn, that is, in terms of operating efficiency, the COP of the two systems both satisfy the normal operating demand, but the dual one is more stable and has a higher COP.

Performance Studies on a Novel Solar PV/T-air Dual Heat Source Heat Pump System

A novel solar PV/T-air dual heat source composite heat pump system was developed and the experimental platform was built to research the instantaneous performance. The experimental results show that the maximum instantaneous generating efficiency of solar PV/T collecting circulation of the system could achieve 15.0% and average heat collecting efficiency was 43.8% when average ambient temperature and solar irradiance were 6.5°C and 581.5W/m2. Heat distribution average ratio of solar, air and compressor at the run time were 28.1%, 35.7% and 36.2% respectively. Heat pump instantaneous COP changed between 2.0 to 2.6 and the average value was 2.5, which indicated that the system performance was relatively well.

Low-power-penalty wavelength multicasting for 36 Gbit/s 16-QAM coherent optical signals in a silicon waveguide.

All-optical wavelength multicasting has been experimentally demonstrated for 36 Gbit/s 16-quadrature amplitude modulation signals based on four-wave mixing processes in a silicon waveguide with multiple pumps. In our experiment, dual pumps are injected together with the signal into the waveguide and nine idlers are generated, involving five wavelength multicasting channels. Coherent detection and advanced digital signal processing are employed, and the recovered constellation diagrams of the multicasting idlers show a root-mean-square error vector magnitude degradation as small as 2.74%. The bit error rate (BER) results are measured for these multicasting idlers, and the power penalties are all lower than 0.96 dB at the BER of 3.8×10(-3) (corresponding to the forward error correction threshold).

Field emission at terahertz frequencies: AC-tunneling and ultrafast carrier dynamics

We demonstrate ultrafast terahertz (THz) field emission from a tungsten nanotip enabled by local field enhancement. Characteristic electron spectra which result from acceleration in the THz near-field are found. Employing a dual frequency pump–probe scheme, we temporally resolve different nonlinear photoemission processes induced by coupling near-infrared (NIR) and THz pulses. In the order of increasing THz field strength, we observe THz streaking, THz-induced barrier reduction (Schottky effect) and THz field emission. At intense NIR-excitation, the THz field emission is used as an ultrashort, local probe of hot electron dynamics in the apex. A first application of this scheme indicates a decreased carrier cooling rate in the confined tip geometry. Summarizing the results at various excitation conditions, we present a comprehensive picture of the distinct regimes in ultrafast photoemission in the near- and far-infrared.

Dual bolus intravenous contrast injection technique for multiregion paediatric body CT.

Optimal vascular and parenchymal enhancement for multi-region paediatric body computed tomography (CT) has many challenges. A variety of approaches are currently employed, associated with varying image quality and radiation dose implications. We present a dual bolus intravenous (DBI) contrast technique for single-acquisition imaging of the chest, abdomen and pelvis, with evaluation of multi-compartmental vascular enhancement. A DBI regime was designed for use with a programmable dual head pump injector. A larger initial bolus (two-thirds volume) is followed by a smaller bolus (one-third volume) before imaging the chest, abdomen and pelvis in a single acquisition, 45-65 seconds from the start of initial injection. Flow rates and second bolus timing were tailored to patient weight and contrast volume, using five weight categories. Multi-compartmental vascular opacification was graded and image quality was assessed in a cohort of 130 patients. The DBI technique resulted in concordant multi-compartmental (thoracic aortic, pulmonary arterial, abdominal aortic and portal venous) vascular enhancement. Early splenic parenchymal enhancement artefacts and alterations to renal enhancement were observed. We present a weight-stratified dual bolus intravenous contrast technique to improve image quality in paediatric multi-region body CT. • In children, optimal vascular and parenchymal enhancement in multi-region CT is challenging. • A dual bolus contrast technique offers concordant arterial and portal venous opacification. • Adaptation to patient size is achieved by stratification into five weight categories. • Dose penalties of 'overlap' and 'dual phase' imaging techniques can be avoided.

Evaluation of iPrecio — Dual Channel pump: A safety pharmacology study case in the Gottingen Minipig

Evaluation of iPrecio — Dual Channel pump: A safety pharmacology study case in the Gottingen Minipig