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A pot experiment was carried out to study effects of different selenium concentrations (0, 5, 10, 25, 50, 75, 100 mg/kg) on the photosynthetic pigment content in Solanum alatum. The results showed that all concentrations of selenium inhibited the chlorophyll a, chlorophyll b and carotenoid contents in...

A pot experiment was conducted to study the effects of different selenium concentrations on photosynthetic pigment content of Pterocypsela laciniata. Five aspects of chlorophyll a content, chlorophyll b content, carotenoid content and chlorophyll content, respectively, were used to analyze the changes...

The effect of different selenium concentrations on the antioxidant enzyme activity of Pterocypsela laciniata was studied by pot experiment. The results showed that the effects of different selenium treatments on P. laciniata were significant. With the increase of selenium concentration, the trend of...

The effect of power ultrasonic on the solidification microstructure of a newly developed Al-Ni-Zn-Mg aluminum alloy has been investigated. The melt of the alloy was treated by ultrasonic field with different powers from 0W to 850W. Without high-energy ultrasonic treatment, the eutectic Al3Ni phases with...

A pot experiment was conducted to study the effects of cadmium (Cd) stress on photosynthetic characteristics of Cyphomandra betace seedlings. The annual C. betacea seedlings were treated with Cd of different concentration gradients (0 - 20 mg/kg). The results showed that with the increase of soil Cd...

A pot experiment was conducted to study the accumulation characteristics of cadmium (Cd) in Cyphomandra betacea Seedlings. The annual C. betacea seedlings were treated with Cd of different concentration gradients (0 - 20 mg/kg). The results showed that with the increase of soil Cd concentration, the...

In this paper, a system for evaluating the development of agricultural economy is developed with nine Level III indicators. By cluster analysis, the 11 cities (zone) of Shaanxi are divided into three classes, including leading areas in agricultural economy, relatively developed areas in agricultural...

Mountain red earth is a kind of relic ancient clay remained on the Yunnan Plateau formed under the influence of paleo climate, but this soil has experienced degradation recently. To understand the mechanism and effects of such degradation, this study examined the mountain red earth based on the analysis...

It is important to analyze the soundness of the Web services composition. And the paper put forward a new method to determine the soundness. After modeling Web services area and Web surrounding area by the open Petri net, an efficient determination algorithm was offered to determine the soundness. At...

Double chamber microbial fuel cell with anaerobic and aerobic was used in treatment of coking wastewater. The influence of electrode materials, initial COD and temperature on the power generation performance of microbial fuel cell was investigated. The results shown that, the electricity production performance...

The airport security inspection network model based on the Petri Net is established to identify the bottleneck of the airport security inspection system. A reach ability graph is set up to represent the process of the security inspection. We can get an isomorphic Markov Chain by simplifying the reach...

The paper applies several business models such as Porter’s Five Forces, Value Chain, and BCG’s Matrix to analyze the overall performance of METRO AG under the condition of Covid-19 to solve the problems of whether METRO is still worthy of investing. This paper also applies financial analysis with an...

Based on the input and output data of eight high carbon industries in Hebei, Inner Mongolia, Shaanxi, Shanxi and Ningxia from the year of 2003 to 2011, this paper used Malmquist-Luenberger Productivity Index to estimate the green productivity and its decomposition. According to the empirical analysis...

COVID-19 is an infectious disease caused by virus SARS-CoV-2 virus. Early classification of COVID-19 is essential for disease cure and control. Transcription-polymerase chain reaction (RT-PCR) is used widely for the detection of COVID-19. However, its high cost, time-consuming and low sensitivity will...

In order to study the pollution level and leaching characters of the heavy metals in the soil of lead-zinc mining area, soil sample in a lead and zinc mine of Hunan is taken as study object. The concentration of heavy metals was analyzed byinductively coupled plasma massspectrometry after microwave digestion...

Taking the finished product warehouse of precision casting enterprise as the research object, the traditional warehouse business process is investigated and analyzed, and the warehouse business process model based on Petri net is established. The reachability tree method is used to analyze the network...

The water system of Suzhou ancient city is vertical and horizontal. There are many water networks composed of large and small rivers, which have the functions of production, life and landscape. Taking the landscape water body of Suzhou ancient city as the research object, the national standard analysis...

Foreign exchange reserves are one of the macroeconomic indicators that play a role in determining national economic stability through its role as a medium of exchange for international economic activity and its influence on the stability of currency exchange rates. Through this study, researchers want...

The stock of Kweichow Moutai, as one of the representative of China’s value investment stocks, rose nearly 60 times in the 19 years since its listing in 2001, its operating income increased from RMB 162 million in 2001 to RMB 88.9 billion in 2019, with a compound annual growth rate of 25%, and its net...

Ozone pre-oxidation removal of MC-LR better, under the condition of pH4,ozone for MC-LR removal of 76.22%,than the original water removal increased by about 11%.With the increasing value of pH, ozone for MC-LR removal decreased, but higher pH beneficial ozone removal of turbidity, UV254, TOC and CODMn....

Detection of combustible gases is very important to reduce the modality and disability of human in both of civil and military situation. In this paper, a method of detection combustible gases of acetone and ethanol was proposed by using back propagation neural network (BPNN) and principal component analysis...

Maintenance management is an extremely important part in the work of electric power communication net, it's the key to guaranty stable operation of the network. This paper proposed that communication maintenance management based on fault early-warning analysis, used big data technology, and combined...

Methyltrimethoxysilane (MTMS) was used as the precursor to prepare organically modified silica (ormosil) aerogel powder. The preparation was done in two steps. In the first step, MTMS was transformed into a gel through crosslinking by a small amount of sodium silicate, and the gel was broken into small...

Along with the development of the internet, people’s entertainment has also changed to online games. One of the most played games in Indonesia is Garena Free Fire. This game is a Battle Royale type that combines online multiplayer video games and survival games. In addition, this game also sells virtual...

For the control unit in the level of automationassisted workshop relatively backward status quo and Put forward its own solution. Auxiliary control of the integrated development of the need for an analysis, the use of Planning and design theory. Based on the current status quo at home and abroad auxiliary...

In order to ensure reliability and safety of nuclear power plants remain within acceptable limits and to achieve cost-effective investment, based on technical and economic analysis method, a economic analysis model of life cycle management (LCM) for main transformers at nuclear power plants is established....

With the development of China’s rural economy, the needs of rural residents have become more complex. Nowadays, promoting the comprehensive information management of rural residents and building a service system has become the goal of developing rural information services. As the best means to improve...

With the development of the times, the demand for dairy becomes more and more heavily all over the world. Meanwhile, the dairy wastewater is doing more and more harm to the environment. Now the SBR(Sequencing Batch Reactor) process has been widely used in dairy wastewater treatment. The SBR process is...

The year 2020 began with the outbreak of COVID-19. Because the outbreak is sudden and difficult to treat, the virus spreads quickly. On 11 March 2020, the World Health Organization declared the Novel Coronavirus pandemic, the highest level of alert. Director-general Tedros Adhanom Ghebreyesus said on...

This research aims to develop an integrated thematic learning model based on Banyuwangi local culture for the development of elementary school students' character. A developmental research by using the Analysis, Design, Development, Implementation and Evaluation model is undertaken. The results of this...

The Railway safety systems continue to face significant challenges from undetected track defects, infrastructure obstacles, and potential collision scenarios. Traditional manual inspection protocols and conventional sensor-based monitoring systems frequently demonstrate limitations in terms of processing...

Earthquake poses serious hazard to human life and property security. Civil engineering structural vibration control especially the semi-active control can effectively reduce the earthquake damage to architecture. Neural network control has the ability of self-learning, adaptivity and parallel distributed...

This study aims to formulate a model of business culture values that are owned by SMEs Padang city. The population for this study consisted entirely of SMEs under the guidance of the Padang City Cooperative and UMKM Service. The sampling technique was using purposive sampling and proportional area sampling...

Agricultural talent education is a characteristic of the current development of agricultural modernization in China, and it is the core mode of agricultural economy that combines emerging digital technology with the agricultural production. Modern agricultural talents are the key to supporting the development...

This study developed a method to extract polyphenols from peanut shells by ultrahigh pressure (PPSUP). The yield of PPSUP was up to 71.3 mg of gallic acid equivalents (GAE) /g under optimizing extraction parameters of ultrahigh pressure to 75% ethanol, 300 MPa, 4 min, 1:25 ratio of material to liquid....

Net photosynthetic rate (PN), transpiration rate (E), stomatal conductance (Cond), intercellular CO2 concentration (Ci), and vapor pressure deficit on the surface (VPD) of Taxus cuspidata leaves set at a series of CO2 concentration were investigated with the LI-COR 6400 portable photosynthesis system....

Second - hand goods trading has become a popular thing in ecollege students' spare time. At present, there are various kinds of information issuing platforms on the market, such as the Net barter, the exchange net, but the content of information issued is less well-directed, the arragement of information...

Through the Job-Creation Law No. 11 in 2020 (UUCK), the government issued a new breakthrough policy by updating several articles in the law on the Prohibition of Monopolistic Practices and Business Competition. These reforms include the existence of a new policy related to the handling of cases in monopolistic...

This research aimed at describing and analyzing moral values and intrinsic element found in the film “Freedom Authors” by Richard LaGravenese. This research used content analysis method. The details came from Richard LaGravenese’s film “Freedom Writers”. Method of collecting the data is through watching...

The purpose of this paper is to research wind power fluctuation character of the wind farm. First, the qualitative and quantitative analysis methods are combined. Sliding difference algorithm is used to construct wind power fluctuations evaluation system. Calculating wind power fluctuations value volatility...

Green development is an inevitable requirement for Traffic Development Strategy. The deep integration of Transportation Network(TN) and New Energy Network(NEN) would become the main trend in the future. This article focused on the analysis of the integration development of Road Network, Water Transportation...

This paper begins with the problems encountered in logging while drilling practice, proposing the necessity and requirement of receiving circuit with rigorous design. Considering the fact that the amplitude of noise signal with low frequency is far greater than that of formation wave, this paper provides...

In view of the performance reduction as a result of data processing of application layer of present Unified Threat Management (UTM) product, this paper analyses two popular UTM solutions. As a new architecture based on Multicore/Multiprocessor, NetChannel solves the network performance bottlenecks under...

The special pure aluminum coating was prepared on the surface of the as-cast AZ80 magnesium alloy by using the advanced technique named cold gas dynamic spray (CGDS). The interface morphology of coatings and substrate were observed. With the changes of the heat treatment temperature and the holding time,...

The mechanical properties of rock mass change significantly in water pressure , and causing coal-rock mass deformation and instability, then leading to significant engineering accident. Based on hydraulic damage experiment to explore the mechanical process that water pressure prompted crack propagation,...

An efficient extraction and purification technique based on ultrasonic microwave-assisted extraction (UMAE) method was established to obtain phenolics-enriched fraction from jackfruit by-products (JPEF). Optimisation of the extraction parameters for maximum extraction yield of JPEF was carried out using...

The stress experienced by drivers is modelled in this article utilising multiple pre-trained networks. Seven pre-trained networks were utilised to extract features from ECG-based scalogram images in order to automatically increase the detection performance: Google Net, DarkNet-53, ResNet-101, InceptionResNetV2,...

Proposed a budget decision framework for online education systems from the view of IT-Governance theory, based on investigations on 11 actual cases. Main features of the model are: (A) identifying performance from 5 domains of common IT-Governance models (B) assessing project risk and benefit by a nonlinear...

The Barlingmascakeb region consists of Banjarnegara Regency, Purbalingga Regency, Banyumas Regency, Cilacap Regency, and Kebumen Regency. The economic disparity among these regencies indicates that economic growth in the region is uneven. This condition is also supported by the high poverty rates in...

Electric Power is the vital energy source in national product and people daily life so the importance of electric power production and transmission is beyond question. As the link between electric power production and transmission, electric power dispatching decides the effective and healthy operation...