Seven novel 3'-mono-substituted chalcone derivatives were synthesized from 2,4-dihydroxyacetophenone in 4 steps in 18-31% overall yield. Their structures were confirmed by 1H NMR. The anticancer activity of these new target compounds (4~10) against human leukemia K562 cells were evaluated by MTT assay...

Objectives: To prepare curcumin tablets, and evaluate their in vitro dissolution. Methods: Curcumin was dissolved in acetone, wet-granulation and tableting. The amount of Poloxamer 188 and Gremophor RH40 were chosen as factors, and the in vitro dissolution at 120 min was used as evaluation index. The...

In this paper, current situation of the development of new construction materials were summed up and analyzed, and the future development trend of new construction materials is analyzed in view of the current market demand of new construction materials.

Green building materials is one of the specific embodiment of the sustainable development strategy in the field of architecture. Because of the differences in geographical, concepts and technology, the countries’ understanding of green building materials and the application are different, and the power...

With the new materials, new technology are being widely applicated in the construction, the requirements has been further, such as how to enrich and expand knowledge and improve their professional qualities. To learn to master modern technology and materials from practice is an effective way. The trend...

This paper determined calcium and magnesium in bioleaching solution of uranium ore by optimized EDTA method. This method used acid chrome blue K-naphthol green B mixed indicator after adding reducing agent hydroxylamine hydrochloride, masking agent triethanolamine and masking agent L-cysteine. This method...

An exhaustive study should be carried on Crumb Rubber Concrete deterioration caused by sulphate attack in this paper. the crumbed tire rubber powder were used to replace fine aggregates of concrete, whose grain size is 0.28mm. The replacement levels were 5%, 10%, 15% and 20 % by volume of the fine aggregates....

Curl mechanism in cold rolled steel strip coiler is the key part for strip curling. This paper established the 3D model of cold rolled steel strip coiler. Based on it, the structure of the curl mechanism is designed and analyzed. The stress distribution of the drum and the drum shaft in the curl mechanism...

Our objective to study the expression and activity of the apoptosis protease Caspase-3 in E. coli BL21 (DE3) Plyss. The cDNA of Caspase-3 was amplified by PCR and inserted into the cell of K562, it was then cloned to prokaryotic expression vector pET-21b, after which Caspase-3 was induced by IPTG. The...

AZ31B was used as the basic material in electroless Plating of Ni-Co-P, The optimium formula and process conditions were obtained by using the orthogonal experiment methods. XRD, SEM and EDS were used to characterize phase structure,compositon and morphology of Ni-Co-P coating. The morphology,corrosion...

Some of the inherent characteristics of the construction industry makes frequently construction safety accidents, and as well , that’s caused a serious of adverse effects , by now, the effective prediction which is about the trend of death number in construction accident becomes extremely important....

Rayleigh damping is the main form in direct integral method for structural nonlinear dynamic analysis under seismic wave. As stiffness proportional damping usually should be neglected for its significant influence on limit time increment, reasonable mass proportional damping becomes more important in...

Through various types of quick shear test, completely grasp the shear deformation characteristic of aeolian sand in Gurbantunggut Desert. The test result shows that the shear deformation curve of aeolian sand is influenced obviously by relative compactness. When the latter one is lower than 95%, the...

Carrying out the evaluation of land suitability for urban construction in mountainous areas will provide a fundamental basis for building mountainous cities. This study carried out a full evaluation on suitability for urban construction and its suitability grade of each evaluation unit in the mountainous...

with the social progress and economic development, the construction industry in China has also yielded rapid development in recent years, and gradually become an important pillar of Chinese national economy. However, with the continuous expansion of the construction industry in scale, the questions existing...

The pre settlement audit work of the construction project cost is a key job in the construction engineering, and is also the most basic work in building engineering. The pre settlement audit work of the construction project cost is the key to the cost control of construction engineering. Economic globalization...

In recent years, with the rapid development of the urban construction and the sharpening of the conflicts on urban land use,it has become the main topic that cities have potentials for sustainable development. People are getting more and more focused on environmental construction,and roof greening is...

In recent years, the development of the mountainous ethnic minority beautiful towns and villages has drawn people’s attention. This paper took the thousand Miao villages Xijiang as an example, studied and analyzed the development strategic on mountainous ethnic minority beautiful towns and villages....

This paper proposed an indicator system to the saving and intensive of infrastructure. The evaluation indicator system was built from three dimensions - transportation facilities evaluation indicator, water supply and drainage facilities evaluation indicator, safety and disaster prevention facilities...

The paper describes a new six mobility platform type robot SHOLKOR. Due to its unique properties, the new platform type robot can be used as an active support to protect buildings, facilities and machinery from sudden mechanical impacts. This paper includes a description of the experimental assembly...

Green building design is different from the traditional architectural design, building not only for science, space utilization, architectural form, building structure to be considered, but from an environmental and energy point of view, the use of ecological, environmental science and energy disciplines...

This paper uses game theory to analyze the behavior of government and enterprises in the Reverse Logistics (RL) of Waste Household Appliances (WHA). A static game model and a dynamic game model are established to study respectively the periods of establishing and operating the Reverse Logistics System...

Site investigation and monitoring on public buildings in Nanjing, analyses on the status and existing problems. Put forward the objective and principle of green transformation, raised the appropriate greening technology reform and seismic strengthening technology. The energy consumption of buildings’...

Serve technique plays an important role in the tennis competition, and it’s an important way to score. In virtue of three-dimensional photograph analytical method, this research presents a kinematical analysis on key links of serve technique by Novak Djokovic, the champion of men's singles in 2014 China...

In order to assess fire vulnerability of old buildings quickly and reasonably, a model for an assessment system of fire vulnerability of old buildings was built, based on the theory of fuzzy comprehensive assessment. Based on the analysis of the building fire spreading process and the mechanical properties...

Song-family folk residence at Xiangcheng County in Henan, China, applied composite bricklaying technology of the red stone and brick, having formed its special style. The building group has a considerable scale, and is well preserved. In the paper, we describe the characteristics and layout of them.We...

At present, an unprecedented development situation of the urban rail and traffic engineering is presented. Bearing as a key component of vehicle operation safety, its performances and reliability should achieve higher requirements. Because the number of characteristic data of bearing performances is...

In order to ensure the traceability of the instruments for automotive testing laboratory, the article describes the necessity and significance of in-house calibration in automotive testing laboratory, according to the CNAS- CL31 " Requirements for In-house Calibration " proposed five important aspects...

Factory automation (FA) system software is a bridge to realize information exchange between processing equipment of semiconductor equipment and factory host. It receives the control instruction sent by a host, and sends the control instruction to the manufacturing equipment after internal analysis and...

According to the requirements of the forest soil respiration experiment, the multichannel measurement system in the forest soil respiration is researched and designed. The system selects the Programmable Logic Controller (PLC) as the core controller, changes the measurement channel by switching the measurement...

With the development of science, technology and production, there is an increasing demand for high-current power supply, which is widely applied in research of high-speed railways, subways, electric cars, DC transmission and electromagnetic measurement science. The commercial high-current power supply...

Simulation technology is extremely important in the design process of control algorithm for missile weapon system. Different from digital simulation and traditional hardware-in-the-loop simulation, a rapid prototyping hardware-in-the-loop simulation technology is proposed which can confirm the control...

Thousands of motor models are assembled in the vehicles. It is necessary to study the distribution characteristics of motor rated power to check the vehicle plants have obeyed the optimal designed methods. Some passenger car samples of body length shorter than 6m have been analyzed. Construct statistics...

The tea physical properties and quality are often influenced by the rolling pressure in the tea production. In this paper, the tea rolling modeling in the barrel rolling machine is established by analyzing the force situation of the tea leaves in the barrel rolling machine. The joint rolling curve synthesis...

The vibration analysis model of slab mill is established in this paper according with the multi-body dynamics theory. The relationship between the vibration displacement and time of the support roller in different conditions is obtained through simulation analysis. Under different damping conditions,...

Researched on a monitoring system for one type of power drive device. Designed a mathematic model for monitoring and evaluating the status of power drive device based on data fusion theory, and developed the related software. Developed a database to manage the measured status data, and then developed...

Vehicle anti-theft alarm system using RFID technology in the region of the vehicle for security management and establish a vehicle intelligent anti-theft alarm and management platform, the vehicle to achieve the automatic import and export with owner identification, vehicle positioning, statistical statements,...

Constrained optimization problems are very important as they are encountered in many science and engineering applications. A hybrid method based on modified augmented Lagrangian multiplier and biogeography-based optimization (BBO) algorithm is proposed to solve constrained optimization problems. The...

Load forecasting is a traditional research issue in the field of electric power system. In this paper, an improved fuzzy time series approach is used to forecast load. Firstly, a method of unequal-sized intervals partitioning based on K-means algorithm is proposed. Secondly, improved fuzzification method...

In Web applications, it is often needed to upload a file to the server. With current file upload methods, it is difficult to deal with large file uploading and user experience is also bad. Uploading big files often failed because of network interruption and the client had to reupload.With the development...

for electronic seal of smart meter with special appearance and light weight ,a batch testing equipmentis designed to write program into seal and test automatically , which will increase the testing efficiency of electronic seam installed in meter. The arrange part being consist of vibrating plate , sliding...

WebRTC is a relatively hot technique for web in the recent years, simple Javascript API can achieve the communications of common data types even audio and video data types between browsers supporting HTML5. Moreover, it possesses the features of no plug-ins, cross platform, low development and usage...

In order to do real-time monitoring disaster prediction and life detection of flammable and explosive, high risk and highly pressure goods in the factory etc. Combination wireless sensor network node with temperature, humidity ,combustible gas concentration sensor ,using four rotor aircraft as a carrier...

In this paper, the vehicle engine block processing characteristics was analyzed based on body machining process path problem, process route optimization mathematical model was established, the principle of the basic genetic algorithm and genetic operation were analyzed also, a kind of improved genetic...

The process of Pichia pastoris fermentation has a long period and less offline data . The cell concentration and some other important variables can not be measured on line. The soft sensor modeling at present is mainly the artificial neural network (ANN).This paper introduces the Support Vector Machine...

The author analyzes the domestic and foreign situation and development trend in the simulation training area, It expounds the shipment command situation laboratory team training mode of the background and content researchins, Proposes the important views for the shipment command simulation laboratory...

To resist different kinds of attacks, Boolean functions used in the cryptosystem should have good cryptographic properties. The Plateaued functions, a large class of Boolean functions containing Bent functions and Partial-Bent functions, are good choices. Therefore, the study of construction and cryptographic...

Based on benefits evaluation, a location model of CMS is provided in the paper. According to the character of the highway network, some parameters are simplified to calculate traffic flow and attenuation coefficient in the model. The results verify the rationality and practicality of the method.

Intensity-modulation and direct-detection (IM/DD) orthogonal frequency division multiplexing (OFDM) systems have gained great attentions from researchers. However, the interaction between the chirp of direct modulation laser and fiber dispersion causes intermixing interferences among sub-carriers. Therefore,...

With the rapid development of Internet, the network traffic explosively grows with the emergence of new network business. The existing electric power communication networks still have the traditional architecture that is the closed system highly integrated with devices and software, which cannot satisfy...

The accurate and available engine rotate speed signal is quite essential to engine control, fault diagnosis, etc. This paper analyses the parameters optimization towards common processing methods of engine rotate speed, aiming at internal combustion engine closed-loop control. Basing on the Matlab/xPC...

Considering that it’s difficult to build target motion model in structure stochastic jump system, this paper studies system errors estimation. Based on the Maximum Likelihood (ML) estimation, a conclusion is drawn, that is, there exists a causal conjunction between system errors and state estimation....

Boosting is an effective classifier combination method, which can improve classification performance of an unstable learning algorithm due to its theoretical performance guarantees and strong experimental results. However, the algorithm has been used mainly in batch mode, i.e., it requires the entire...

Boosting is an effective classifier combination method, which can improve classification performance of an unstable learning algorithm due to its theoretical performance guarantees and strong experimental results. However, the algorithm has been used mainly in batch mode, i.e., it requires the entire...

With the development of science and technology, the wireless transmission system has a broad application field. This system need to collect the temperature data of two nodes. So we use the new single chip microcomputer STC15W1K24S as microprocessor, DS18B20 as temperature sensor, low power consumption...

The distribution network may be influenced by access of a large number of distributed generations, such as the impact of short level, reactive power, voltage ride through limitation, bi-directional power flow, etc., which brought a lot of uncertainty for networks’ operation and controlling. The future...

At present, with the video data growth, in the transmission system of theater video monitoring, it uses the communication way of IP unicast and IP broadcast to transmit video data, which leads to the rapid consumption of bandwidth. In order to solve the above problem, this paper proposes to adopt the...

This article introduces the placing signage and the high-voltage trigger system of the extracorporeal cardiac shock wave treatment instrument. The placing signage is composed of a solenoid coil, a cylindrical sheet metal and a parabolic reflection cup. The cylindrical sheet metal is pushed sharply by...

At present, in the transmission system of theater video monitoring, it usually uses the Winsock interface to set up streaming media server, which leads to the defect that the remote monitoring terminal of this system must rely on the Windows operating system, but not the smart TV based on Android operating...

With the significantly increased exploitation speed of offshore marine resources, marine environmental pollution is getting more and more attention in recent years. Offshore environmental monitoring has become a hot issue in marine ecological environmental research. Wireless sensor networks (WSNs) technology...

Risk assessment is a critical step for the robust operation of an information system. We incorporate machine learning and statistical theory together in risk recognition and evaluation to accommodate the dynamic and complex characters of information systems. first, SVM classifier is employed to recognize...

In process mining, one of the major challenges is to find a process model in the best possible way through the describing observed behavior. The hidden transitions exist in the process models, but not found in the log sequence. This paper is based on the probabilistic behavioral relations from the incomplete...

Automatic vending system is being widely used, the system of business process was mainly related to data flow and control flow, so the soundness analysis for business processes of automatic vending system is more difficult. The existing research about the soundness analysis of the process model is mainly...

CCD (charge coupled device) is one of the mainstream of image sensors, it plays a more and more important role in the real-time image processing and recognition. For airborne CCD image recognition problem, this paper proposes an enhanced method of wavelet transform. It can real-time processing of airborne...

The objection of this article is to optimize auto-cascade refrigeration system. This refrigeration system use multiple mixture (R22/R23/R14) as the refrigerant, which is driven by the single-stage compressor. Throttle is an important composition of auto-cascade refrigerant system, which impact on evaporation...

The emergence of miniature robot makes micro vision sensing system become a hot topic in the field of scientific research. The main task of miniature visual sensor system is image acquisition and wireless transmission, but image transmission occupied the main part of the energy consumption. In order...

According to the shortcoming of present helicopter wind tunnel test by manual operation , an automatic control technology based on network communication was developed for the helicopter winder tunnel experiment. It includes the test standard process and different pipelines between command communication...

The objective evaluation of teachers’ teaching quality can stimulate teachers’ teaching enthusiasm and improve teaching quality. In this paper we apply an algorithm based on Boolean matrix in rough set for data analysis on the evaluation of teachers’ teaching quality, optimize the evaluation index and...

Considering the nonlinearity and uncertainty of first tunnel hoop stress changes that caused by the construction of underwent tunnel in Suzhou metro line 4. According to the basic principles of fractal theory, Hurst index of the hoop stress time series was calculated by using R/S and V/S analysis method....

orsion system is a typical pulse impulse measuring method. Currently used analysis model is the impulse moment interaction model. According to the response characteristic analysis of torsion system under pulsed impulse action, using analytical methods, this thesis proposes error analysis methods for...

Stereo vision is a non-contact method to realize 3D reconstruction of free-form surface, and has a wide range of applications in the field of reverse engineering and virtual reality. The technology of camera calibration has always been the research hotspot and difficulty. In this paper, firstly the experimental...

With the development of economy and the improvement of personal consumption, the demands of people for consumer goods are becoming more diversified and individualized. In recent years, the personalized shoemaking system is favored by market, and the traditional shoemaking industry needs new technologies...

Parametric analysis and of system design is the basic issue of torsion thrust measurement system. Based on parametric analysis of thruster size, weight and maximum thrust, as well as torsion damping ratio, vibration frequency and the torsional stiffness coefficient, the thesis proposes a method for parametric...

Index is indispensable in database system to speeding up data access. Commonly used indexes in main memory databases are B+-Tree, T-Tree and their variants. Cost model of main memory database are more complex than disk-oriental database, and relatively little work has been done on this area. This paper...

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...

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...

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 presents a new type of clock system based on standard CMOS 0.18 m, 1.8V process. It can be used for 14bit, 500 MHz sampling frequency, time interleaving (TI) ADC. The clock edge reassignment technique has been introduced in this paper. Simulation has been run in Spectre under Cadence platform....

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,...

It is known as the third wave of the information industry after the personal computer and the Internet technology. IOT is an important breakthrough in the new century. On the basis of analyzing the system structure and technical characteristics of the Internet of things, the key technology of the Internet...

This paper summarizes three kinds of improved strategies for ant colony optimization algorithm: the improved strategy based on the structure of solution, the improved strategy based on the pheromone updating, and the improved method based on the solution processing. Taking the ant colony system as an...

In this paper, we present a path planning for mobile robot based on improved ant colony optimization algorithm. In order to increasing the algorithm’s convergence speed and avoiding to fall into local optimum, we proposed updating the pheromone residues. Experiments show that this method is effective...

The application of multimedia technology in college music teaching has important practical significance. The article analyzes the effect of multimedia technology in music teaching and discusses the optimization of multimedia technology in music teaching on the basis of the principles adhered to from...

This paper introduces a new smart home system with low-power, scalability and highly security. The system takes the relatively high performance STM32 chip as the core of data processing, and integrates high-precision resistive touch screen, ZigBee wireless sensor control network, GPRS remote data transmission...

This paper proposes a novel direct and completely nonlinear alignment method for the strapdown inertial navigation system (SINS). The method uses the sparse-grid quadrature Kalman filter based on the Kronrod–Patterson rule (SG-KP-QKF) and nonlinear models. The system equations and the measurement equations...

Compressive sensing is a novel information theory proposed recently.It broke through the restrictions of the traditional Nyquist sampling theorem on the sampling frequency,which can only use fewer sampling signals to describe the original signals.This article introduces an image fusion algorithm based...

A nondestructive and accurate measurement method and related apparatus based on the split-cylinder resonator techniques is descried in this paper. The dielectric constants and loss tangents of the flat substrate materials are suitable to be characterized and then calculated by software programmed according...

GIS has been introduced to Jining’s air quality automatic monitoring system. The system provides the client with easily available services of high quality. In order to meet the need of big data storage of the monitoring system we designed the distributed cloud storage framework to deploy MongoDB storage...

With the development of Internet and communication technology, the Internet data growth rapidly, and the type of network services varied. According to the different properties of the network services, network services classification is the foundation of many network applications, including network service...

Photometric accuracy and precision are the most important technical parameters of spectrophotometers. In this paper, our three instruments, that is Datacolor SF600, X-Rite Color i7 and Varian Cary 5000 UV-VIS-NIR spectrophotometer, were inspected on their photometric precision for color measuring. Five...

Auto-cascade refrigeration system using multiple non-azeotropic refrigerants, taking advantage of the difference between the evaporation temperature of high and low boiling point components, applying the single-stage compression, by the way of internal cascade to obtain a larger working temperature range,...

The Field Programmable Gate Array(FPGA) can be used to generate PWM waves to control DC motor’s working, therefore a system of automobile’s automatic wipers which could convert wipers’ speed autonomously were designed base on it in this paper. The core module of the system was FPGA which generated PWM...

An algorithm based on SIFT feature detection method(Scale Invariant and Feature Transform) and using conversion step of the circular area selection feature points described are introduced into image feature detecting and matching for better real time performance and higher precision.Improved SIFT features...

Traveling Salesman Problem (TSP) is a well-known NP-hard combinatorial optimization problem. The Particle Swarm Optimization has been proven to succeed in lots of problems, but the PSO algorithm is challenging due to a variety of factors such as easy to fall into local optimal solution and the convergence...

It poses high requirements for the calculation speed and the precision of the solving method when we consider the large-scale transmission expansion planning (TEP) problems. Therefore, combined with the respective characteristics of EDA (Distribution of Estimation Algorithm) and DE (Differential Evolution...

Compared with the traditional teaching methods, modern new media including the instructional and social media represent the new direction for the mode of education and teaching quietly, which contributes to the effectiveness of teaching increasingly. Interactive teaching mode at biological teaching of...

Hepatocarcinoma, a malignant cancer, threaten human life badly. It is a current issue to seek the effective natural remedy from plant to treat cancer due to the resistance of the advanced hepatocarcinoma to chemotherapy. Chrysin (Chr), a major symbol ingredient in Chinese Propolis, has a wide range of...

To solve the problem of current communication network for smart distribution automation, key technologies of heterogeneous networks were analyzed and researched, including network resource management, dynamic network selection and intelligent switching strategy as well as channel protection algorithm...

In practical process of dynamic balancing, rotating speed, mass and angular location of trial weight will affect one-time balancing effect. In order to find the best balancing speed, trial weight mass and angle, computer simulation and experimental research are conducted. The results show that, one can...

Confirming about the working point of the permanent magnet is an essential premise in the calculating of permanent magnetic circuit. In this paper, the choosing methods about the working point of the permanent magnet are analyzed overall. The calculating formulas of the optimal calculating are deduced...