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Because of the limited power and long propagation distance between spacecraft and Earth station, the high power efficiency is more important for space information system than others terrestrial communication system. Motivated by the potentially large gain achievable with iterative decoding, one novel...

With the development of Sino-foreign cooperative education and internationalization, more and more Chinese students have been to U.S. and other countries, in order to acquire international experience, or dual degree both from domestic and foreign universities. It’s a little bit difficult to know the...

The Mesozoic sequence framework of the eastern Yihezhuang salient in Jiyang depression, which was a residual basin, was studied in order to improve the success rate of locating hydrocarbon reservoirs. First, through seismic profiles, well logs and cores, complemented with outcrops, totally 5 sequence...

With self-developed pulse weld device, stainless steel 1Cr18Ni9Ti is pulse welding repaired under three different conditions. Metallographic specimens are prepared respectively. Metallographic observation results show that the size of pores in the fusion zone and the pulse weld layer increases along...

Elliptic curve cryptography has the characteristics of high-security strength and low computational complexity. Elliptic curve cryptography relies on point multiplication, which is the most time-consuming part of the encryption and decryption process. The Elliptic Curve Cryptosystem is currently the...

The quick transient response technology of low-voltage differential linear voltage regulators (LDO) has emerged as a research hotspot due to the growing need for dynamic power management in 5G and IoT devices. This article reviews three advanced LDO designs: 1)The dynamic high-impedance charge pump LDO,...

In a real wireless channel, both a channel bit error and a collision between competition stations can cause a data frame loss. Moreover, DCF always assumes that a data frame loss is due to the collision and the contention window will double in next transmission. In fact, we think that the contention...

This study delves into the dynamic intersection of behavioral economics and sustainable tourism, focusing on the innovative use of nudging techniques to promote responsible and eco-friendly behaviors among travelers. Nudging, a concept rooted in behavioral science, is harnessed to design interventions...

Point cloud models are widely used in industry. It is also faced with increasingly serious copyright protection issues. A new watermarking algorithm of 3D point cloud model using angle quantization index modulation is proposed. At first, a point cloud model is segmented into many patches according to...

In the context of current technological development, large language models (LLMs) have become a core component of artificial intelligence. This report provides an in-depth discussion of various advanced strategies and techniques to improve the processing and computational efficiency of LLMs. First, the...

DCF adopts a binary backoff procedure in order to avoid the further collision. In a real wireless channel, both a channel bit error and a collision can cause a data frame loss. However, DCF always assumes that a data frame loss is due to the collision. In fact, a channel bit error should not cause the...

Scholars at home and abroad have done lots of research on feature selection methods in Chinese text classification, such as document frequency (DF), information gain (IG), and a -test (CHI). On the basis of their work, we propose a new selection method of counting the unbalanced degree of term distribution,...

Monitoring harmonic in power grid is particularly important because harmonic will seriously affect the quality of power energy. Based on a high-performance 32-bit processor STM32F103 and a electric energy metering chip ADE7878, a harmonic monitoring device is designed for measuring 2-31 harmonics in...

In order to train the workers of power stations, a simulation system of the fire-fighting equipments manual-control-pad is designed with a high-performance 32-bit CPU TMS320F28335 and an Ethernet chip W5300. The simulation system will start or stop 8 virtual fire fighting equipments by operating the...

This paper presents a 14-bit 2.5GS/s current-steering segmented DAC with a new technology of synchronization, called multi-clock synchronization, which is used to optimize the timing between the internal digital and analog domains. The quad-switch architecture is also adopted to mask the code-dependent...

How to correctly segment frames from bit-stream of unknown link-layer protocol is an important issue in the field of information security. Sync-codes identification is the essence of bit-stream segmentation, while the key of sync-codes identification is mining features of sync-codes distinguished from...

English for elementary school in Indonesia is regarded as local content curriculum area which mandates that it should include value and local knowledge associated with region in which English curriculum is delivered (Ministerial Decree No.060/U/1993). Considering this decree, this research aims to investigate...

This paper presents a 14-bit 500MSPS ADC in 0.18 um CMOS process. By interleaving two 250MSPS ADCs, a sample rate of 500MSPS is achieved. The offset, gain error and time skew between the two channels are calibrated in the background. The measurement shows that the ADC has performances of 10.6 bits ENOB,...

Based on results of biomass combustion and pyrolysis using TG-DSC analyzer, biomass thermodynamics characteristics were studied. Integrated heat model and differential heat model were used to determined biomass thermal behavior, and the former fitted the actual better; the heat capacities with temperature...

In this paper, a 12 bit 500MS/s IF Sampling ADC is described. The ADC has an integrated input buffer with a new linearization technique that improves its distortion. Eight pipeline stages with fully differential switched capacitor architecture follow the input buffer. Each of stage of the pipeline, excluding...

This paper describes a 1.8V 12 bit 1 GS/s pipeline ADC realized in a 0.18 m BiCMOS SiGe process. The ADC consists of a two-way time-interleaved hierarchical structure. Each sub-ADC consists of one input buffer and T&H with BiCMOS technology which improves the dynamic performance and reduces the converter...

The traditional Transform Domain Communication System(TDCS)utilizing the fixed threshold is difficult to adapt to the increasingly complex and variable electromagnetic environment, and the adaptive thresholding methods only concern the probability of detection and ignore the probability of false alarm...

A CMOS input buffer with linearization technique for high-speed A/D is introduced. The buffer features high-linearity and low-power consumption. The simulation shows that the SFDR of the buffer is up to 107dB at an input clock of 250MHz with an input signal of 10MHz. A 14-bit 250MSPS pipelined A/D converter...

There are various factors affecting drying shrinkage of cement-based material, including use quantity of cement and auxiliary cementitious material, water cement ratio, maintenance system and drying condition, and in addition, total quantity of coarse and fine aggregate, matching and category also affect...

As an excellent tear agent of the second generation, CS has been widely used in the police department of many countries. CS disperses the crowd depending on the aerosol in the air due to combustion and explosion. And at the same time, CS decomposes into a variety of products. With the use of TG/DSC-FITR...

In this paper we have designed and implemented vedic multiplier using RCA, CSA and MCSA. The main component of DSP is the multiplier. The demand for high-speed multiplier circuitry is enormous. One of the most crucial factors in determining a multipliers effectiveness is speed, power and area. In order...

To cope with increasingly rigorous challenges that large scale digital integrated circuit testing is confronted with, a comprehensive compression scheme consisting of test-bit rearrangement algorithm, run-length assignment strategy and symmetrical code is proposed. The presented test-bit rearrangement...

Modern science and technology to foreign language teaching creates infinite possibilities. Development of the Internet has also brought opportunities for the development of Russian teaching in China. At present, Russian Teaching English is relatively backward a bit, especially in the application of new...

The Ni-Co/HZSM-5 methane dehydroaromatization (DHA) catalyst was prepared using wet impregnation. The catalysts were characterized by XRD, TEM, TG-DSC, FT-IR and XPS techniques before and after reaction. The results show that the maximum conversion rate of methane DHA at 580 reached 39.8%. The carbon-silicon-oxygen...

In Disruption Tolerant Networks (DTN), information is exchanged between mobile nodes with the same transmit power. It is an energy-consuming process and highlights the need for energy-efficient power control mechanisms. If the transmit power of nodes is too low, they might miss many of the opportunities...

To resolve the problem of a little bit low speed the typical image feature extraction algorithm SURF ( speeded up robust feature ) has , in the paper we do an in-depth analysis on the algorithm properties in regard to its running time , instruction type , memory access , hot spots , and etc. On this...

Adopting laser cladding technology, 3 kinds of alloy powder (Ni, Fe, Co) is successfully cladded on the surface of mold copper plate. Metallurgical bonding between cladding layer and Cu substrate is generated. Cladding layer has fine grained structure without micro-crack and bubble. The average hardness...

The LED is a new lightweight cipher, which was published in CHES 2011. This cipher could be applied in the Wireless Sensor Network to provide security. On the basis of the single byte-oriented fault model, we propose a differential fault analysis on the LED cipher. The attack could recover its 64-bit...

A bilateral investment treaty is a treaty between two countries to promote and protect the two-way investment. With the continuous and in-depth upgrade of “the Belt and Road”, the requirements for bilateral investment treaties are also increasing. The existing bilateral investment treaties under “the...

Radio Frequency Identification (RFID) is an automatic identification technology towards maturity in1980s and a non-touching automatic identifying technology. In this system, collision is a frequent issue. The introduction of binary anti-collision algorithm makes it possible for dynamic adjustments of...

This research aims to analyse and identify` the major of agricultural potencial sector and agricultural sub sector, identified the commodity potency of the major food plant sub sector, and to analyse the growth of food plant sub sector in OKU District. The result shown that the potency of agricultural...

This paper presents a detailed description of a direct digital frequency synthesizer(DDFS) using optimized quartet ROMs. The quartet ROMs technology allows improving the system’s working frequency with respect to controllable chip size and beneficial effects on system performances. Such a high-speed...

One OCDMA PON system is discussed in this paper. Multi-length Two-Weight Carrier Hopping Prime Codes is selected as encoder scheme, encoded information is transmitted through Optical fiber. Hard Limiter is utilized in receiver terminal to ensure lower bit error rate. Simulation shows that it can be used...

The addition of nano-SiO₂ to 20% silane coupling agent is carried out using anhydrous ethanol as the solvent in the presence of acetic acid. The styrene-butadiene-styrene (SBS) is added with 1% dicumyl peroxide crosslinking agent by adding 5% maleic anhydride grafted polyethylene to be modified on an...

Silver doped TiO2 catalyst TiO2-Ag was synthesized by microwave hydrothermal method when the optimal condition was selected with orthogonal and single factor tests. The photocatalytic activity of TiO2-Ag catalyst was further enhanced by the microwave and ultrasonic assisted with using methyl orange as...

Tolerance of ambiguity of the military members very often determines their professional culture, which helps them fulfil professional duties. Tackling situations that are complicated, working well in unpredictable circumstances, dealing with uncertainty in a positive and constructive manner, feeling...

The scan digital display has the function of receiving and processing digital signals. As an advanced display type, the digital display presents a trend of accelerating development. Because of shortage of the long development cycle and high price of the traditional display design, this paper designs...

In this letter, a wireless image transmission system is proposed and presented based on the visible light communication (VLC). This system consists of OV7670 image acquisition module, STM32, encoding module based on FPGA, modulation driving circuit and LED. IPPM, which has advantages of high average...

Recently, various acquisition systems require data converters to provide higher resolution and sampling rates. The physical layout of parallel interfaces and the bit rate limitations of serial LVDS methods pose technical hurdles for designers. The design is based on the classical architecture of FPGA+DSP+ADC...

In recent years, new communication technologies has made rapid development. Orthogo-nal Frequency Division Multiplexing (OFDM) is a core technology in the fourth-generation wireless communication field(4G). The basic principle of OFDM is to split a high-rate data stream into a number of lower. In OFDM...

FIR filter is widely used in the fields of signal processing with high fidelity. In the design of FIR filter the traditional algorithm such as serial DA algorithm, parallel DA algorithm and combined series and parallel DA algorithm are all not so suitable, which has lots of shortcomings. In this design,...

A novel image encryption scheme with permutation-substitution mechanism is proposed. In the permutation process, the discrete generalized Arnold map is applied to disorder pixel positions and exchange the gray values of corresponding pixels at bit-plane pair. The continuous generalized Arnold map is...

OFDM Visible light communication (VLC) systems can achieve both illumination and data transmission simultaneously via light emitting diodes (LEDs). Orthogonal frequency-division multiplexing (OFDM) has been considered as a promising multi-carrier modulation technique for VLC due to its ability to boost...

DTA/SDTG and DSC techniques were used to study the thermal behaviors of citronellol- -D-glucopyranoside (CGLY) . The heating rate was 5, 7.5, 10, and 12.5 K min-1, the samples were heated from 30oC to 500oC. Methods of Friedman and Flynn-Wall-Ozawa were applied to calculate the parameters of thermal...

Group delay distortion between channels is one of the most important factors which affect the BER (bit error rate) performance of DBF (digital beam forming) System. The basic principles of DBF and the concept of group delay are first introduced, and a linear group delay filter is designed based on the...