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Online since: November 2017
Authors: Sara Faiz Hanna Tasfy, Maizatul Shima Shaharun, Noor Asmawati Mohd Zabidi, Ahmed Elbagir, Duvvria Subbarao
Finally, the value for the catalyst surface area was calculated according to the BET equation using the adsorption data collected at relative pressure (P/P0) between 0 to 1, while the value for the pore size distribution was determined from the desorption branch of the adsorption isotherm by the Barrett-Joyner-Halenda (BJH) method.
The reduction behavior of the calcined catalyst was determined via temperature programmed reduction under the flow of dilute 5%H2 in Ar.
CZS-20 shows two reduction peaks at low temperature (150oC) and high temperature (310oC) representing the reduction of bulk Cu (Cu2+ → Cu1+) and small particle size (Cu1+ → Cu0), respectively.
In addition, the presence of the second reduction peak at the higher reduction temperature for CZS-20 catalyst could be attributed to the reduction of CuO specimen inside the pores of SBA-15.
The data presented show that the activity, methanol selectivity as well as the space time yield increased with increasing the metal loading until it reaches maximum values at 15 wt% while further addition of metal inhibits the catalytic performance.
The reduction behavior of the calcined catalyst was determined via temperature programmed reduction under the flow of dilute 5%H2 in Ar.
CZS-20 shows two reduction peaks at low temperature (150oC) and high temperature (310oC) representing the reduction of bulk Cu (Cu2+ → Cu1+) and small particle size (Cu1+ → Cu0), respectively.
In addition, the presence of the second reduction peak at the higher reduction temperature for CZS-20 catalyst could be attributed to the reduction of CuO specimen inside the pores of SBA-15.
The data presented show that the activity, methanol selectivity as well as the space time yield increased with increasing the metal loading until it reaches maximum values at 15 wt% while further addition of metal inhibits the catalytic performance.
Online since: February 2013
Authors: Feng Qing Wang, Guo Dong Wu, Lei Chen, Li Feng Liu, Jia Shan Dong, Zhen Long Li, Ya Zhen Wei
Furthermore, the database for potential on-site problems is created to analyze and diagnose downhole pump unit working conditions by collected real-time data, which is helpful for further rectification.
In such way, the real-time monitoring data of various wells can be inquired and called.
Behavior analysis is performed based on real-time monitoring data extracted by ADO remote data access technology.
If working point locates above the head lift curve, it means inadequate pump lift or data error.
Interface form shows data from database.
In such way, the real-time monitoring data of various wells can be inquired and called.
Behavior analysis is performed based on real-time monitoring data extracted by ADO remote data access technology.
If working point locates above the head lift curve, it means inadequate pump lift or data error.
Interface form shows data from database.
Online since: December 2012
Authors: De Liu
In this system,the literacy controller of SD card by SPI interface is designed based on FPGA.The overall design is realized in Nios II soft processor with C/C++ language,and the technology of First In First Out is used to solve timing problems,and then ultimately the overall design features are realized.This design takes advantages of the features of FPGA,which has reduction in development time,an efficient data processing,and other characteristics.The successful application in data storage collected by the audio chips shows that the design is feasible and valid.
In this system the SPI bus interface is used for data communication and FIFO technology is used to realize data clock synchronization, finally the SD card initialization and functions such as reading and writing operations are completed .
SPI interface controller Four lines is used by SPI interface:the serial clock line(SCK),the host input/slave output line(MISO),the host output/slave input line(MOSI) and the enable signal line(CS).FPGA is the host of the system.When the enable signal (CS) is low,data is sended in falling edge of the serial clock signal (SCK) and is read in rising edge.SPI is a ring bus structure as shown in Fig.2.When the CS signal is valid,the parallel data from the host is stored in the shift register and is converted into the serial data.Then the serial data is stored in SD card.At the same time the serial data in SD card is read and is converted into parallel data by the shift register when the CS signal is valid,then the parallel data is returned to the host.
Literacy controller The literacy controller has two components,the command controller and the data controller.Fig.3 is the block diagram of literacy controller.After the initialization,a written instruction or a read instruction is sended from the command controller to the SD card in the CS effective signal ( low level ) and waiting for the SD command response.When the SD command response is 0x00h,the status skips to the data controller.A data starting token (0xFE) was sended by the writing data controller after received the right writing command from the SD card and SD card is written into the corresponding data.Here the default data length is 512 byte,at the same time there are two bytes of CRC check bit.After finished these 512 bytes data,SD card come into the busy status and data write operation is completed.Read-write operation are inverse process, here no longer give necessary details.
The difference between the gathering rate of data and the reading and writing rate of SD card data maybe lead to discontinuous data or missing data.Increasing the reading and writing data cache can effectively solve this problem.When data is written or read,in order to avoid overflow or read in the empty state,it must be ensure that the FIFO can not be written in full state and can not be read in the empty state.The capacity of the buffer can be selected according to the rate of the data collected.The 16-bit width FIFO is used in this design.
In this system the SPI bus interface is used for data communication and FIFO technology is used to realize data clock synchronization, finally the SD card initialization and functions such as reading and writing operations are completed .
SPI interface controller Four lines is used by SPI interface:the serial clock line(SCK),the host input/slave output line(MISO),the host output/slave input line(MOSI) and the enable signal line(CS).FPGA is the host of the system.When the enable signal (CS) is low,data is sended in falling edge of the serial clock signal (SCK) and is read in rising edge.SPI is a ring bus structure as shown in Fig.2.When the CS signal is valid,the parallel data from the host is stored in the shift register and is converted into the serial data.Then the serial data is stored in SD card.At the same time the serial data in SD card is read and is converted into parallel data by the shift register when the CS signal is valid,then the parallel data is returned to the host.
Literacy controller The literacy controller has two components,the command controller and the data controller.Fig.3 is the block diagram of literacy controller.After the initialization,a written instruction or a read instruction is sended from the command controller to the SD card in the CS effective signal ( low level ) and waiting for the SD command response.When the SD command response is 0x00h,the status skips to the data controller.A data starting token (0xFE) was sended by the writing data controller after received the right writing command from the SD card and SD card is written into the corresponding data.Here the default data length is 512 byte,at the same time there are two bytes of CRC check bit.After finished these 512 bytes data,SD card come into the busy status and data write operation is completed.Read-write operation are inverse process, here no longer give necessary details.
The difference between the gathering rate of data and the reading and writing rate of SD card data maybe lead to discontinuous data or missing data.Increasing the reading and writing data cache can effectively solve this problem.When data is written or read,in order to avoid overflow or read in the empty state,it must be ensure that the FIFO can not be written in full state and can not be read in the empty state.The capacity of the buffer can be selected according to the rate of the data collected.The 16-bit width FIFO is used in this design.
Online since: September 2011
Authors: You Liang Mao, Ya Zhang
Carbon Emissions Measure and Trend
Data Resources and Measure Means This paper applies the energy data in Yunnan Statistical Yearbook (1998 to 2008).
The carbon calculation uses an average carbon emission coefficient according to the second best choice of statistical data.
Energy consumption carbon emission is worked out according to IPCC carbon emission calculation guide combined with characteristics of Yunnan’s statistical data.
Yunnan’s carbon emission coefficient of major energy consumption roots in default value of IPCC carbon calculation manual with an original data in J.
The data was in completely accordance with the above carbon emission structure.
The carbon calculation uses an average carbon emission coefficient according to the second best choice of statistical data.
Energy consumption carbon emission is worked out according to IPCC carbon emission calculation guide combined with characteristics of Yunnan’s statistical data.
Yunnan’s carbon emission coefficient of major energy consumption roots in default value of IPCC carbon calculation manual with an original data in J.
The data was in completely accordance with the above carbon emission structure.
Online since: September 2014
Authors: Jun Fu, Wei Chen, Yuan Tang, Yi Ma, Guang Ming Li, Zhi Guo Zhu
Adopted the second reading every time to record each working condition of 5 sets data.
For the relatively large error data increase the secondary readings and all the results should be recorded.
Used the Lauta rule to judge and eliminate bad values which ensured the reliability of the experimental data[12] .
Through analyzing the data of fuel consumption and noise value at each speed, the fuel consumption overall decreased by about 1.6% and the noise value also had an average of 3.2 dB decrease, the highest value up to 3.6 dB.
Further Analysis of the data on other experimental conditions it found that the results were consistent with normal conditions.
For the relatively large error data increase the secondary readings and all the results should be recorded.
Used the Lauta rule to judge and eliminate bad values which ensured the reliability of the experimental data[12] .
Through analyzing the data of fuel consumption and noise value at each speed, the fuel consumption overall decreased by about 1.6% and the noise value also had an average of 3.2 dB decrease, the highest value up to 3.6 dB.
Further Analysis of the data on other experimental conditions it found that the results were consistent with normal conditions.
Online since: January 2016
Authors: Alexandru Cernat, Niculae Negurescu, Constantin Pana, Obeid Zuhair H. Obeid, Iulius Bondoc
The investigations highlight the improvement of the combustion process by use the bioethanol at the supercharged spark ignition engine which leads to the reduction of brake specific fuel consumption (BSFC), to an accentuated reduction of monoxide carbon (CO) and unburned hydrocarbons (HC) due to lower carbon (C) content.
The engine was mounted on a test bench which was equipped with the next instruments equipment’s: AVL ALPHA 160 eddy current dynamometer (with throttle actuator), a real time AVL data acquisition system, AVL in-cylinder pressure transducer line, AVL gas analyzer, Khrone Optimass mass flow meter, air flow meter, thermo resistances for engine cooling liquid temperature, engine oil and air intake temperatures and thermocouples for exhaust gas temperature, manometer for air pressure from engine intake manifold.
Theoretical and experimental investigations results The running mode of the dyno was setup on constant speed (n=constant) and for each operating regime were measured the power, speed, in-cylinder pressure, exhaust gas emissions, temperatures, air and fuel flows and a complete data acquisition file with necessary engine running parameters.
Conclusions 1-At the use the gasoline-bioethanol blends the engine power and torque are higher comparative to gasoline use. 2-At the gasoline - bioethanol blends use at investigated supercharged SI the reduction of NOx may be achieved in the area of λ > 1.3 dosages were the strategy of engine load qualitative adjustment can be applied. 3-At the gasoline-bioethanol blends use engine BSFC is smaller comparative to gasoline use for λ=1-1.25. 4-The maximum pressure at stoichiometric dosage for bioethanol –gasoline blends is same with gasoline use. 5-The bioethanol is a good alternative fuel and a good antiknock agent References [1] L.
Heywood, Direct Injection Bioethanol Boosted Gasoline Engines: Biofuel Leveraging For Cost Effective Reduction of Oil Dependence and CO2 Emissions, Massachusetts Institute of Technology, MA 02139, Cambridge, April 20, (2005)
The engine was mounted on a test bench which was equipped with the next instruments equipment’s: AVL ALPHA 160 eddy current dynamometer (with throttle actuator), a real time AVL data acquisition system, AVL in-cylinder pressure transducer line, AVL gas analyzer, Khrone Optimass mass flow meter, air flow meter, thermo resistances for engine cooling liquid temperature, engine oil and air intake temperatures and thermocouples for exhaust gas temperature, manometer for air pressure from engine intake manifold.
Theoretical and experimental investigations results The running mode of the dyno was setup on constant speed (n=constant) and for each operating regime were measured the power, speed, in-cylinder pressure, exhaust gas emissions, temperatures, air and fuel flows and a complete data acquisition file with necessary engine running parameters.
Conclusions 1-At the use the gasoline-bioethanol blends the engine power and torque are higher comparative to gasoline use. 2-At the gasoline - bioethanol blends use at investigated supercharged SI the reduction of NOx may be achieved in the area of λ > 1.3 dosages were the strategy of engine load qualitative adjustment can be applied. 3-At the gasoline-bioethanol blends use engine BSFC is smaller comparative to gasoline use for λ=1-1.25. 4-The maximum pressure at stoichiometric dosage for bioethanol –gasoline blends is same with gasoline use. 5-The bioethanol is a good alternative fuel and a good antiknock agent References [1] L.
Heywood, Direct Injection Bioethanol Boosted Gasoline Engines: Biofuel Leveraging For Cost Effective Reduction of Oil Dependence and CO2 Emissions, Massachusetts Institute of Technology, MA 02139, Cambridge, April 20, (2005)
Online since: December 2014
Authors: Hui Wang, Ping An Liu, Ling Ke Zeng, Wen Cheng Zhu, Xiao Su Cheng, Qian Ying Liang, Yan Chun Liu
Calculation and analysis for the Thermodynamic theory
XRD phase analysis
The synthesis process of titanium carbide produced by the carbon thermal reduction is a complex series of compounds.
According to the reaction equation of enthalpy delta △G0 [5] and standard state balance reaction temperature, to calculated from the reaction thermodynamics data of the materials, the results obtained are showed in table 3.
Table 3 Thermodynamic data of reactions △G0 (KJ/mol) T0(K) △G0(1)=258.12-0.199T 1297 △G0(2)=370.72-0.202T 1835 △G0(3)=224.76-0.162T 1387 △G0(4)=539.57-0.392T 1376 △G0(5)=264.56-0.210T 1260 △G0(8)=1354.15-0.965T 1403 △G0(10)=244.99-0.108T 2268 △G0(11)=314.60-0.214T 1470 △G0(12)=678.58-0.368T 1844 Mechanism of the microwave synthesis reaction of titanium carbide is concluded via analyzing the thermodynamic data and results of the XRD; When the temperature reaches to a value, the balance temperature to the lowest, and also the fastest one.
The thermodynamic analysis cannot be performed due to the lack of the thermodynamic data about γ-Ti3O5.
Comparing with conventional heating, the carbon thermal reduction reaction occurs through the heat source provided by microwave is much more different.the interphase is the Ti3O5 and γ-Ti3O5.when the microwave is used as the heat source.
According to the reaction equation of enthalpy delta △G0 [5] and standard state balance reaction temperature, to calculated from the reaction thermodynamics data of the materials, the results obtained are showed in table 3.
Table 3 Thermodynamic data of reactions △G0 (KJ/mol) T0(K) △G0(1)=258.12-0.199T 1297 △G0(2)=370.72-0.202T 1835 △G0(3)=224.76-0.162T 1387 △G0(4)=539.57-0.392T 1376 △G0(5)=264.56-0.210T 1260 △G0(8)=1354.15-0.965T 1403 △G0(10)=244.99-0.108T 2268 △G0(11)=314.60-0.214T 1470 △G0(12)=678.58-0.368T 1844 Mechanism of the microwave synthesis reaction of titanium carbide is concluded via analyzing the thermodynamic data and results of the XRD; When the temperature reaches to a value, the balance temperature to the lowest, and also the fastest one.
The thermodynamic analysis cannot be performed due to the lack of the thermodynamic data about γ-Ti3O5.
Comparing with conventional heating, the carbon thermal reduction reaction occurs through the heat source provided by microwave is much more different.the interphase is the Ti3O5 and γ-Ti3O5.when the microwave is used as the heat source.
Online since: December 2023
Authors: Ariel Riofrio, Haci Baykara
In addition, data was modeled using literature and libraries found in the LCA software.
The software used as an aid in the LCA is SimaPro [20], which allows data to be inputted as inventory for the evaluated processes.
ReCiPe Midpoint H [21] method was selected in the SimaPro [20] software as the converter of inventory data to impact category results.
However, a newer technology that has been developed could affect these results as the data of this review are from the early 2000s [30].
Data Availability Supplementary Information File is available upon request with the authors.
The software used as an aid in the LCA is SimaPro [20], which allows data to be inputted as inventory for the evaluated processes.
ReCiPe Midpoint H [21] method was selected in the SimaPro [20] software as the converter of inventory data to impact category results.
However, a newer technology that has been developed could affect these results as the data of this review are from the early 2000s [30].
Data Availability Supplementary Information File is available upon request with the authors.
Online since: January 2013
Authors: Wei Li, Fu Shun Liu, Wen Wen Chen, Chun Fu Peng
Recently, Chen [9] proposed a new approach for expanding incomplete experimental mode shapes which considers the modelling errors in the analytical model and the uncertainties in the vibrational-mode data measurements.
Mode shape expansion based on coordinate decomposition Similar to the work by Liu (2011), we also define a hybrid vector for the th mode, which includes the measured data at master coordinates and constant values at slave coordinates, i.e.,
Guyan, Reduction of Stiffness and Mass Matrices.
Miller, Dynamic Reduction of Structural Models, J.
Ephrahim, Improvement in model reduction schemes using the system equivalent reduction expansion process, AIAA J. 34(1996) 2217-2219
Mode shape expansion based on coordinate decomposition Similar to the work by Liu (2011), we also define a hybrid vector for the th mode, which includes the measured data at master coordinates and constant values at slave coordinates, i.e.,
Guyan, Reduction of Stiffness and Mass Matrices.
Miller, Dynamic Reduction of Structural Models, J.
Ephrahim, Improvement in model reduction schemes using the system equivalent reduction expansion process, AIAA J. 34(1996) 2217-2219
Online since: July 2013
Authors: Fei Fei Zhao
The verified, extremely low circuit noise floor makes it highly likely this data is valid.
[2] Ott, Henry W,“Noise Reduction Techniques in Electronic Systems,”Wiley-Interscience, 1976
[3] LSK-389 Data Sheet, Linear Integrated Systems
[4] 2SK-369 Data Sheet, Toshiba
[5] LTC6655 Data Sheet, Linear Technology Corporation.
[2] Ott, Henry W,“Noise Reduction Techniques in Electronic Systems,”Wiley-Interscience, 1976
[3] LSK-389 Data Sheet, Linear Integrated Systems
[4] 2SK-369 Data Sheet, Toshiba
[5] LTC6655 Data Sheet, Linear Technology Corporation.