Search all articles

Nine kinds of environmental estrogens including -estradiol, estrone, mestranol, ethisterone, ethinyloestradiol, diethylstilbestrol, cortisone, estriol and hydrocortisone were determined using high performance liquid chromatography (HPLC). The determination conditions were optimized that ProntSIL 120-5-C18-ace-EPS...

A novel rhodamine 101 derivative has been synthesized and employed as a fluorescent off-on probe for monitoring Cu2+ in aqueous solutions and living cells. Under physiological conditions, it exhibits a remarkable increase in absorbance at 587 nm and an enhanced fluorescence at 615 nm toward Cu2+ in a...

Particles aggregation technology is a kind of effective method to strengthen the collection and removal of ultrafine particles. The flow field of the turbulence coalescence device was simulated by FLUENT, and the results showed that diaphragms in the turbulence coalescence device could produce vortices,...

In tourism brand building, brand biography, as the core carrier to convey the brand identity narrative, plays a vital role in shaping the emotional connection of tourists. This research aims to examine the interaction effect between brand biography type and social comparison orientation on brand loyalty,...

“Tongzhi” as a social appellation is a typical Chinese usage, whose collocates patterns in different contexts reflect the alteration of its semantic prosody as a meaning unit. This paper describes the actual phenomenal use of “Tongzhi” under different pragmatic backgrounds and analyzed the semantic preference...

In the 21st century in China, multimedia technology and network technology have changed social production and development model and have also changed people's life style and learning style. Computer technology not only promotes knowledge economy development in our country, improves international competitiveness...

In the last 20 years, Orff music teaching method has attracted much attention in China and has been widely used in junior high school and senior high school dance teaching. This paper explores the application of Orff teaching method in colleges and universities and finds that the application of Orff...

This paper puts forward a new method of alphanumeric character recognition based on BP neural network classification and combined features. This method firstly establishes three BP networks respectively for three categories of characters which are classified according to their Euler numbers, with the...

This paper discusses the peak of both glucose uptake and standards of polysaccharides are Gracilaria maximum absorption at 485nm, it is OK to select UV measured drawing and polysaccharide content in the sample solution of polysaccharide from Gracilaria glucose standard curve absorptiometry a wavelength...

In recent years, the rapid development and wide usage of wireless sensor networks, makes it a research hotspot at home and abroad. Wireless sensor network is an open network, the sensor nodes can easily be captured or tampered. Ensuring network security is a prerequisite for communication. So, establishing...

This paper aniline wastewater reaction solution using Orthogonal Design Hydrogen Peroxide Degradation of aniline process, results showed: Impact H2O2 Decomposing aniline five factors (aniline initial concentration, pH value, H2O2 dosage, reaction time, temperature), the effect of H2O2 dosage maximum...

In order to solve the problem of water-rich loess tunnel in construction process, the paper based on the idea of underground water environmental balance, use the Kuniaki Sato empirical formula and underground runoff modulus to build correlation function, get the permeability coefficient. Then we combine...

In national internationalization development, the demand for translation talents increases gradually. Hence, colleges need to formulate sound translation talent training scheme to improve the work quality. However, some colleges cannot well train skill-oriented and application-oriented talents under...

With the launch and implementation of the intelligent grid, the remote meter reading through power line carrier and GPRS wireless network has been widely deployed gradually. However, the wireless network based on SIM card is vulnerable to interference at present, the packet loss and drop occurring sometimes,...

Affected by the outbreak of the novel coronavirus pneumonia (COVID-19) in early 2020, the economy of all walks of life in China has been affected to varying degrees. To analyze the extent to which various industries in a certain provincial city(call it A city) are affected by the epidemic, this paper...

Through the group key agreement, all group members could negotiate a common session key which is used in later secure communication. While simple GKA cannot provide enough security to resist the adversary’s attack, and the malicious damage during the agreement makes the authenticated key agreement particularly...

The six prism type Ce0.7La0.3O2- solid solution was prepared by reverse co-precipitation method with urea and Na2CO3 as double precipitant. The reverse method favored the washing of precipitate and formation of rod-like CL. Using urea as a homogeneous precipitating agent before precipitation with Na2CO3...

Wireless sensor network routing protocol security objective is to ensure data integrity, authentication and availability. In this paper, the characteristics and applications of routing protocols for wireless sensor networks are analyzed. This paper presents the analysis of security routing protocol for...

Making use of micro Doppler Effect measured by continuous wave radar (CW radar), the micro Doppler modulation mathematical model of radar echo cased by projectile rotation is established, and the analytic relationship between projectile rotation and micro motion is deduced. Based on Hilbert-Huang Transform...

To realize multi-image scheme selection of product color design, the grey relational analysis method was introduced into product color evaluation process. Through multi-image acquisition of product color design, users were asked to give their scores of each color scheme according to target multi-image,...

in this paper, the magnetic field and arc of a contact structure of 126kV vacuum interrupter are studied and tested. The magnetic field values of the contact structure is measured and compared with the results of simulation. The results of simulation are verified by comparing the results of the two calculations....

When a major event creates a behavior cluster, this cluster’s spatio-temporal data is the group behavior time-space domain. The time data of each individual on the space is a time series data. So this article we first to analyze the time series, approximately express the time series with the piecewise...

General pseudospectral method is extended to Lie group by virtue of equivariant map for solving rigid dynamics on Lie group. In particular, for the problem of structural characteristics of the dynamics system can not be conserved by using general pseudospectral method directly on Lie group, the differential...

Camera calibration is the first step of positioning using binocular vision. Owning to the approximation capability of the neural network, a complex mathematical model needed by traditional calibration methods can be avoided. However the general neural network methods have their drawbacks to reduce its...

In the parameter identification for transmission line, there often exist the gross errors in the measured data and lacking of robustness with traditional least square. This paper applies the Huber estimation to the transmission line parameter estimation, i.e., proposes a robust least square estimation...

A sample of 312 individuals (residents and tourists) in Macao was investigated by completing a survey assessing their gambling expectancy and the gambling intention. The Smallest Space Analysis (SSA) was adopted as the confirmatory factor analysis (CFA) to validate the Chinese version of gambling expectancy...

Based on the current situation and sorts of plights faced by one-children under the newly revised “family planning” policy, this paper reads, analyzes, and compares the past studies on “the problem of one-child parents’ old-age care” in The Paper (澎湃新闻in Chinese)and Xinhua News Agency (abbr. Xinhua in...

This article proposes a new method for prediction of public transit passenger volume based on phase space reconstruction and support vector machine (SVM); applies mutual information method in calculating the optimal time delay of time series of public transit passenger volume; applies Cao’s method in...

Due to the complex topography and strict requirement for the construction as well as the significant effect, from the stress and strain, on the geometric shape of such a continuous bridge with variable cross-section, it is difficult to control the geometric shape of the bridge without stress monitoring....

The ancient Chinese supervision system has a long history. As an important part of traditional Chinese political practice, it is a state supervision system established to maintain the established ruling order, restrain power, supervise government officials, punish corruption, maintain the integrity of...

This paper examines the evolution of the images of key figures from the Three Kingdoms period across different historical documents, classical literature, and modern popular culture. Drawing upon historical texts such as the record San Guo Zhi三国志 and folk novel Romance of the Three Kingdoms三国演义, as well...

The properties of the reservoir sandstone mainly depend on the sedimentary environment and the diagenesis. The thoroughly research on the diagenesis of the sandstone reservoir in the sixth oil layer of the Upper Triassic Yanchang formation has been one of the core geological problems. The comprehensive...

The direction and limitation of desulfurization and denitrification reaction were analyzed by calculating thermodynamic functions, and the reaction mechanism of desulfurization and denitration was proposed. The pollutant removal efficiencies were deduced by the equilibrium partial pressure of SO2 and...

With the development of terminal equipment system based on information technology, simulation training becomes popular in the military field because of its convenience, efficiency, scalability, etc. However, it is hard for both the existing simulation training system simulation module and the actual...

In order to understand the knowledge of AIDS among college students and the basic situation of life skills of AIDS prevention, behavioral intervention was carried out to understand the effect of intervention, so as to provide the basis for health education in colleges and universities. By using the method...

College students entrepreneurship has become a trend, the government and the community are actively promoting, but also the emergence of a number of successful cases. The factors which influence on College Students' Entrepreneurship in China's present situation analysis, is not difficult to see the external...

The construction of smart cities is an inevitable path for urban transformation and upgrading, holding significant practical and theoretical importance in research on smart city development pathways. Constructed upon the perspective of the push-pull theory, this paper establishes an analytical framework...

Crag lurks danger to thorpe and road, which would bring on momentous losses of people and riches in case of collapse. Applicability of correlative theories and finite element method was studied. In allusion to specifically dolomite's occurrences and by virtue of data rooting in autoptic reconnaissance...

The data resources in universities are increasing rapidly with the maturity of big data technology.The state has invested a great deal of money to promote the construction of the intelligent campus and the data assets in the universities play a vital role in the various decisions made by the university...

With the rapid development of network technology, micro and flipped Lesson lesson has been gradually applied to the teaching of physics, college physics experiment course for the problems, this paper presents micro lesson teaching mode and flipped Lesson experiment lessons integrated application in students...

Genetic algorithm (GA) is a search algorithm based on the theory of Darwin. For the purpose of improving the convergent rate and maintaining the population diversity in GA, this paper presents a new genetic operator called trisecting group and directional selection mechanism (TDGA), in which the worst...

Hongyuan Coal Mine belongs to low gas permeability coal seam, its permeability coefficient is lower than 0.1m2/(MPa•d), so the gas extraction will be difficult to do and the efficiency of extraction will be low, underground gas extraction has been using polyurethane to seal hole and this method exits...

The indoor temperature control process in air-conditioned room is a multiple-input multiple-output (MIMO), nonlinear and time-delay system. Whereas the traditional off-on control methods, traditional PID control and conventional fuzzy control, exist some advantages and disadvantages, so this paper has...

An investigation on the energy band structures, density of states, elastic coefficients and Debye temperature of monoclinic ZrO2 and monoclinic Bi2O3 at ambient pressure was investigated via first-principles calculations based on density functional theory (DFT). The calculation results from the energy...

As an important carrier of Chinese traditional culture, traditional auspicious patterns reflect Chinese culture tradition, social customs, national psychology, aesthetics and her special cosmic view and moral value, and also show the long history and particular charm of Chinese traditional culture. As...

Ground stress is the most primary stress in earth's crust and not disturbed by engineering. In underground engineering, the fundamental cause of the deformation of surrounding rock is the influence of ground stress after the roadway excavation. Ground stress testing can provide basic design parameters...

CGMCC5515(Rifr) were domesticated step by step. Pb-resistant bacteria (PbRB) of CGMCC5515 were selected in directional enrichment and screened with TTC from the pot rice rhizosphere soil with lead and other remediate material, the reverse screen model of simulation soil rice culture with reproducible...

The Computer Generated Force (CGF) has decision ability by self-learning mechanism, which is an important research field in applying machine learning technology to military simulation. On the basis of modeling architecture of Agent and Learning Classifier Systems (LCSs) technologies, a learning behavioral...

In wireless sensor network protocol, a multi hop routing protocol based on density clustering is proposed to deal with the problem of large communication overhead, unbalanced node consumption and hierarchical routing. Protocol divide clusters by density based method, and transfer the data with the base...

The conception of citizenship education needs to be delivered to a wider range worldwide in terms of having development of globalization and integrating different communities and cultures. Under the environment of the COVID pandemic and intensifying global issues, carrying out citizenship education appears...