Search

In order to satisfy the robotic personalized service requirements that can select exclusive items to perform inference and planning according to different service individuals, the service robots need to have the ability to independently obtain the ownership relationship between humans and their carrying items. In this work, we present a novel semantic learning strategy for item ownership. Firstly, a human-carrying-items detection network based on human posture estimation and object detection model is used. Then, the transferred convolutional neural network is used to extract the characteristics of the objects and the back-end classifier to recognize the object instance. At the same time, the face detection and recognition model are used to identify the service individual. Finally, on the basis of the former two, the active learning of ownership items is completed. The experimental results show that the proposed ownership semantic learning strategy can determine the ownership relationship of private goods accurately and efficiently. The solution of this problem can improve the intelligence level of robot life service.

Computer data processing mode in the era of big data from pattern recognition to intelligent sensing is discussed in this paper. Intelligence refers to the interconnection between things and things and people through the Internet of Things and mobile Internet, combined with the general big data computing, communication, artificial intelligence and other technologies. Neighborhood dependence reflects the proportion of approximate samples to all samples under decision class in mixed information system, and it is also a measure to describe the degree of relationship between conditional attribute set and decision attribute, so it can be used as a heuristic function to reduce the attribute of mixed information system. This paper designed the model from the collection to processing, from pattern analysis to the intelligent sensing. The experimental results have proven that the proposed model can sense the data effectively.

Vertical-axial tidal current turbine is the key for the energy converter, which has the advantages of simple structure, adaptability to flow and uncomplex convection device. It has become the hot point for research and application recently. At present, the study on the hydrodynamic performance of vertical-axial tidal current turbine is almost on 2-D numerical simulation, without the consideration of 3-D effect. CFD (Computational Fluid Dynamics) method and blade optimal control technique are used to improve accuracy in the prediction of tidal current turbine hydrodynamic performance. Numerical simulation of vertical-axial tidal current turbine is validated. Fixed and variable deflection angle turbine are comparatively studied to analysis the influence of 3-D effect and the character of fluid field and pressure field. The method, put the plate on the end of blade, of reduce the energy loss caused by 3-D effect is proposed. The 3-D CFD numerical model of vertical-axial tidal current turbine hydrodynamic performance in this study may provide theoretical, methodical and technical reference for the optimal design of turbine.

Scenario test for advanced driver assistance systems function based on V2X technology is the most important step before any application to be put into practise. Lots of advantage V2X applications were intended on warning the threaten from blind spot of driver which are much more strict than the other function based on cameras or microwave radars always. Because of the high safety risk induced by drivers and vehicles, it has to avoid these scenarios with only software test or even vote of experience. To test the original design fully, this work offered a method which was integrated by cooperative navigation and wireless communication technology. By using the structure of cooperative system, the Kalman Filter was selected for the estimator for tracking the moving target and a novel virtual-real interaction concept was suggested for high speed, high accuracy and high risk test scenario. The designed system can play as a vehicle of a crowed of vehicles to accompany with the test vehicle, so not only the wireless network can be offered, but also the motion simulation. Each part in the system was detailed by mathematical model. Compare to other test methods, the suggested method has advantage in low risk, high accuracy and high efficiency. And the relative navigation keeps a desire distance between the scenario design and real time information.

Signal collision is a very common phenomenon in broadcast wireless communication such as V2X network by lacking of central regulator due to its high speed and complex traffic situation. However, it also contains useful information which can enhance environmental awareness capabilities to adjusting transmit power for keeping the channel's busy ratio under a desired limitation especially. This paper suggests an improved HMM model for information perception by measurement on collision time's length without any changes in V2X communication standard or wireless hardware. Essentially, it's designed to estimate the number of collision nodes by combing the characters of BSM as the apriori knowledge and the periodic surveillance records on control channel as the measurement information. The significant change compare to our previous work is in the initial conditions estimation with types of BSM which is more realistic. The clogged city scenario which induces signal collision easily was selected for test the performance of suggested method with a fully connected network. Computer simulation's results showed that the suggested model can work well with high accuracy also even with different types of BSM which contains kinds of additional information.

A prototype 120 Hz 110-inch ultra-high-definition a-Si liquid crystal display (LCD) panel was successfully developed using the BOE exclusive advanced superdimensional switching technology. This LCD has a panel consisting of 3840×2160 pixels, four times the number of pixels in the conventional full-high-definition LCD. For the brightness and contrast ratio, 1000 nits and 1200:1 have been achieved, respectively. Additionally, the liquid crystal charging time has been extended through quad area driving and 2G2D line structures. Furthermore, the local dimming and mirror-scanning techniques are applied to realize excellent image display. Finally, the system utilizes 3D shutter glasses, allowing the viewer to achieve the highest sense of realness and immersion.

Scramjet is crucial to develop hypersonic technology. The hypersonic vehicles with scramjet as power de- vice are of much significance for national defense security and space transportation. In this paper, the requirements for thermal protection materials of scramjet were analyzed and current status of the application of C/SiC composites in scramjet was reviewed. At last, the development proposals and key problems needed to be solved for C/SiC compos

The elastoplastic phenomenon of the structures will be advent under the action of the strong earthquakes, the presented research on the vibration control of the ones is chiefly concentrated on fuzzy and neuro-controller with the expense of bigger energy. In the paper, the 3-storey benchmark building is used as research object, the control strategy of vibration system with fractional-order is studied. The control method based on acceleration responses output is emphatically concerned as it is usually adopted in most actual application of active vibration control techniques. The concrete courses include the following three steps: the integer-order approximation of fraction-order, the transfer function reduction in frequency-domain which base on Pade approximation, the controller design and simulation. In the last, an example is used to show the feasibility of proposed method.

The structural contingency perspective has been widely used in information systems development (ISD) project risk management research. This paper develops an integrative model to explore the moderating effects of uncertainty on the relationship between risk management and IS development project performance from a vendor perspective, rather than the client perspective that is mainly employed in the literature. A survey-based research design is used to collect data to test the proposed model. The results reveal that project uncertainty can moderate the effects of project planning and control on process performance and the effects of user participation on product performance. More specifically, the results indicate that project planning and control makes a greater contribution to process performance when there is a low level of inherent uncertainty and that user participation makes a greater contribution to product performance when there is a high level of inherent uncertainty. The results of this study contribute to a more acute understanding of the contingency approach to ISD project risk management.

Objective Higher mean arterial pressure during cardiopulmonary bypass may improve cerebral outcome associated with cerebral air embolism by increasing emboli clearance and collateral flow to salvage the ischemic penumbra. However, this may come at the expense of increased delivery of embolic load. This study was designed to investigate the influence of mean arterial pressures on cerebral functional and histologic outcome after cerebral air embolism during cardiopulmonary bypass in an established rat model. Methods Male Sprague–Dawley rats were exposed to 90 minutes of normothermic cardiopulmonary bypass with 10 cerebral air embolisms (0.3 μL/bolus) injected repetitively. Rats were randomized to 3 groups (n = 10, each) that differed in mean arterial pressure management during cardiopulmonary bypass: 50 mm Hg (low mean arterial pressure), 60 to 70 mm Hg (standard mean arterial pressure), and 80 mm Hg (high mean arterial pressure). Neurologic score was assessed on postoperative days 3 and 7 when cerebral infarct volumes were determined. Cognitive function was determined with the Morris water maze test beginning on postoperative day 3 and continuing to postoperative day 7. Results Neurologic score was better in high and standard mean arterial pressure groups versus low mean arterial pressure groups. High mean arterial pressure resulted in shorter water maze latencies compared with standard and low mean arterial pressure on postoperative days 6 and 7. Total infarct volume and number of infarct areas were not different among groups. Conclusions The use of higher mean arterial pressure during cardiopulmonary bypass in a rat model of cerebral air embolism conveyed beneficial effects on functional cerebral outcome with no apparent disadvantage of increased delivery of embolic load. Maintaining higher perfusion pressures in situations of increased cerebral embolic load may be considered as a collateral therapeutic strategy.

The temperature field of 119.4 cm(47 in) LED backlight unit was analyzed by finite element method.As a result,the efficiency of Al back cover is better than that of EGI one over 20%.Comparing the calculation result with the real temperature,the relative error is only 1.65%.The experimental results show that the temperature field analysis method for LED backlight unit is feasible.

The cross-talk in plastic scintillating fiber array detector with high-energy gamma incident was studied through Monte-Carlo simulation.The relationship between cross-talk and lead layer was also analyzed.Modulate transfer function(MTF),which shows quantity of spatial resolution of imaging detector,was analyzed and compared in order to get the MTF results caused from the difference thickness of lead layer.The results show that there exists severe cross-talk in the detector irradiated by high-energy particles,and the lead layer can reduce the effect.On the other hand,the pixel of detector may become big as the lead layer is introduced,which can reduce the spatial resolution.Through the simulation computation,it is proved that the right thickness of lead layer will reduce cross-talk and increase spatial resolution of imaging detector.

According to the engineering investigation of long-distance oil and gas pipelines, the criterions and measures of route selection are drawn as follows: the flat landform is the first choice in route alignment. The foot of mountain is the first choice when the route passes by the valley. The route should pass by but the shady and deposited slope and not in sunny and erosive slope as possible as it can. The pipeline should be vertical to contour climbing and descending the mountain except steep slope. Tunnel can be used in crossing foothill. Perpendicularly traversing the river is better than beveling; the worst choice is to put the pipeline along the river. Bypass is the best choice in karsts area. The order of route selection should be pre-choosing, investigation, optimization and adjustment.

The measurement equipment provides basis for relay protection and controls, so it is crucial to ensure the measuring precision. A digital and analog mixed test scheme based on a computerized model and signal generator has been designed in this paper, the test scheme uses the simulation software to produce kinds of test signals, then transfers them to analog signals meeting the requirement of the device under test, then compares the measurements with the inputs, analyzes the measurement precision under many kind of conditions. Then some examples are given to improve the test scheme operable. In conclusion, the test scheme is a multiple parameters test plan for the general electrical devices, it has so many advantages, such as higher precision, good flexibility, easy modification, good versatility and so on. Also it makes all the measuring precision tests easy, and the test workload to be reduced significantly.

OBJECTIVES To identify the signaling pathways involved in the anti-inflammatory shift of the cytokine balance due to hypothermia during cardiopulmonary bypass. DESIGN Experimental animal study. SETTING Department of experimental surgery of a university hospital. SUBJECTS Young pigs. INTERVENTIONS Animals underwent normothermic (37 degrees C) or hypothermic (28 degrees C) cardiopulmonary bypass (n = 6 each). Samples of liver tissue were taken before and 6 hrs after cardiopulmonary bypass. MEASUREMENTS AND MAIN RESULTS Intrahepatic expression of tumor necrosis factor-alpha, interleukin-10, inducible nitric oxide synthase, and suppressor of cytokine signaling-3 was detected by reverse transcriptase polymerase chain reaction and/or Western blotting. Concentrations of the inhibitory protein of nuclear factor-kappaB, IkappaB, and of the signal transducer and activator of transcription (STAT)-3 were measured by Western blotting. The DNA-binding activity of nuclear factor-kappaB and STAT-3 was assessed by electrophoretic mobility shift and supershift assays. Liver cell necrosis and apoptosis were assessed by histology and terminal deoxynucleotidyl transferase-mediated dUTP nick end-labeling assay, respectively. Pigs operated on in hypothermia showed significantly higher intrahepatic concentrations of interleukin-10 and lower concentrations of tumor necrosis factor-alpha than the others. They also showed a lower percentage of hepatic cell necrosis but not of apoptosis. This anti-inflammatory reaction observed in the hypothermic group was associated with a higher expression of suppressor of cytokine signaling-3 and with increased activation of STAT-3. Activation of nuclear factor-kappaB and expression of inducible nitric oxide synthase, however, were not significantly different between both groups. CONCLUSION Our results show that hypothermia during cardiopulmonary bypass up-regulates interleukin-10 via STAT-3 activation, which in turn leads to the attenuation of tumor necrosis factor-alpha expression and to hepatic protection.

OBJECTIVES We sought to test the hypothesis that cytokines would be expressed in the myocardium of infants with congenital cardiac defects and to identify the signaling pathways involved. BACKGROUND Mechanical stress upregulates pro-inflammatory cytokines in the myocardium. METHODS Fifteen infants with tetralogy of Fallot (TOF) (n = 7) or with ventricular septal defects (VSDs) (n = 8) were investigated. Concentrations of pro- and anti-inflammatory cytokines and of the inducible nitric oxide synthase (iNOS) were measured by enzyme-linked immunosorbent assay and/or Western blotting in the right ventricular myocardium taken during cardiac surgery. Activation of the nuclear factor-kappa-B (NF-kappa-B) and p38 mitogen-activated protein kinase (MAPK) pathways was assessed by electrophoretic mobility shift assay with supershift and/or Western blotting, respectively. RESULTS The pro-inflammatory cytokines tumor necrosis factor (TNF)-alpha, interleukin (IL)-1-beta, and IL-6 and the anti-inflammatory cytokine IL-10 were detected in the myocardium of all patients. Concentrations of the pro-inflammatory cytokines and also of phosphorylated p38 MAPK were higher in patients with TOF than in those with VSD and correlated with the degree of pressure overload of the right ventricle. Levels of phosphorylated I-kappa-B-alpha, iNOS, and IL-10 were similar in patients with TOF and in those with VSD. CONCLUSIONS Our results show intramyocardial synthesis of pro-inflammatory cytokines in infants with congenital cardiac defects. This is associated with activation of both the NF-kappa-B and p38 MAPK pathways. The latter could be particularly important for the transduction of mechanical signals in the infant's myocardium. Synthesis of IL-10 indicates an intramyocardial anti-inflammatory potential in this age group.

Objectives: This study was undertaken to test the hypothesis that the myocardial protective effect of moderate hypothermia during cardiopulmonary bypass involves upward regulation of heat shock protein 72. Methods: Sixteen young pigs were randomly assigned to a temperature regimen during standardized cardiopulmonary bypass of normothermia or moderate hypothermia (temperatures 37°C and 28°C, respectively, n=8 per group). Myocardial probes were sequentially sampled from the right ventricle before and during bypass and 6 hours after bypass. Messenger RNA encoding for heat shock protein 72 was assessed by competitive reverse transcriptase-polymerase chain reaction, and heat shock protein 72 synthesis was assessed by Western blot and immunohistochemical methods. Induction of apoptosis was assessed by gene expression of apoptosis-regulating proteins (Bcl-xL, Bak, and Fas) according to competitive reverse transcriptase polymerase chain reaction. Apoptotic cells were identified with an in situ apoptosis-detection kit (terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate nick-end labeling) in combination with morphologic criteria. Necrotic cells were detected by standard histologic methods. Results: Moderate hypothermia rather than normothermia was associated with earlier and higher gene expression and synthesis of heat shock protein 72 in the myocardium during and after cardiac surgery. In the hypothermia group both heat shock protein 72 and the messenger RNA encoding it were detected as soon as 30 minutes after initiation of bypass and before aortic clamping, whereas in the normothermia group they were not detected before aortic clamping. Immunohistochemical methods showed localization of heat shock protein 72 in the cardiomyocytes, endothelial cells, and macrophages. Although the percentage of necrotic cells in the myocardium was lower in the hypothermic group, the induction of apoptosis regulatory proteins and the percentage of apoptotic cells did not differ between the groups. Conclusions: These results suggest that the myocardial protective effect of moderate hypothermia during cardiopulmonary bypass involves upward regulation of heat shock protein 72 and inhibition of necrosis but not of apoptosis. J Thorac Cardiovasc Surg 2002;124:724-31

The laser coherent field imaging system emits multiple beams of laser from earth to space, and laser scans remote space target by passing through turbulence atmosphere. Multi-beam laser intensity fluctuation caused by atmosphere turbulence is a key factor affecting high-resolution imaging quality of the coherent field imaging system. Aiming at solving the problem of imaging quality degradation caused by laser intensity fluctuation error, we discuss the mechanism of laser intensity fluctuation error influencing the imaging quality of laser coherent field high-resolution imaging system. The theoretical model about the relationship between laser intensity fluctuation factor and imaging quality is proposed for the first time. Firstly, the laser echo field signal error induced by laser intensity amplitude fluctuation factor is deduced according to laser transmitting atmosphere theory. Then adopting multi-beam phase closure arithmetic, the phase closure coefficient error is derived from the laser intensity fluctuation factor and laser echo field signal. The mechanism of disturbed laser echo signal influencing phase closure coefficient is investigated in detail. In the following, based on reconstructed spectrum theory, the model of imaging frequency spectrum error propagation, caused by laser intensity fluctuation factor, is proposed. Finally, we reveal the mechanism of laser intensity amplitude fluctuation factor influencing reconstructed imaging frequency spectrum and imaging quality. The correctness and validity of the theoretical model are verified in simulation experiment. In the three-beam laser coherent field imaging simulation experiment, the imaging quality is evaluated by the Strehl ratio of the image. Experimental result shows that the Strehl ratio is only related to the light intensity fluctuation of one of the three beams of laser, and the greater the fluctuation of laser intensity, the more serious the degradation of imaging quality is. The research draws the conclusion that the reconstructed imaging frequency spectrum and image quality are mainly affected by the laser intensity fluctuation of the second beam in the three-beam phase closure algorithm, regardless of other two laser intensity fluctuations. Thus, in order to restrain the degradation of imaging quality caused by laser intensity fluctuation, we only need to keep stable the laser intensity of the second beam but not all of the laser beams. In this paper, we reveal the mechanism of laser intensity fluctuation affecting high-resolution imaging quality in the three-beam laser coherent field imaging system. The research provides a theoretical basis for analyzing imaging quality degradation from the laser intensity fluctuation caused by atmospheric turbulence, and reasonably assigning the light intensity stability of multi-beam laser emitter to improve the imaging quality in laser coherent field imaging system.

Many factors influence the implementation of traceability system in our country, an important factor is the core enterprises lack desire. This paper constructed the Nash game equilibrium in traditional food supply chain and the Pareto game equilibrium in food supply and demand network (FSDN), and analyzed the relationship between investment and income in the two situations. In the traditional non-cooperative state, enterprises will invest a low level in food traceability system for their own interests. In the Pareto equilibrium model, enterprises in FSDN will invest a higher level in food traceability system construction.

In order to solve the fire command network communication problems not be guaranteed when fire forces implement fire rescue in a building, fire command network radio propagation model is designed and algorithm is investigated. First, the research is conducted from the fire fighting and rescue emergency communication security status and characteristics of building fire, introduced the ITU-R indoor propagation model and Keenan-motley indoor propagation model. Then, using different frequencies experimental statistics of radio waves, we got the attenuation model results of interior building penetration. Finally, we established the attenuation model for the building penetration and wave field strength and level calculation. Several experimental results show that for the same building, using the frequency of 2.4GHz, 17dBm transmit power of the base station, we deploy single point and multi-point base stations to achieve signal coverage inside building, the measurement results which is obtained from spectrum analyzer shows that reception field strength of the signal can be achieved 97% ~ 99% at several predetermined monitoring. It can satisfy the communication support requirements of fire forces rescue.

A control method of variable lane based on video detection is proposed in this paper to handle the adaptive switching of the lane's oriented attribute. Based on the image calibration, visual loop detectors are built up in the surveillance video of the intersection. Then, the characteristics of the traffic flow, such as flow rate, velocity, queue length, can be obtained by the video detection based on these detectors in real time. With further analysis of the traffic flow in the channelized lane, the variable lane's orientation is determined for the objective of enlarging the traffic capacity of the intersection. Based on the simulation on the software VISSIM, we verify that the proposed method can enhance the traveling capability and reduce the congestion, compared with the original control method.

A commissioned development and cooperative development is the main and commonly used form of foreign lower permeability oilfield development. In the case of information asymmetry, in the process of cooperation and game, permeability, recovery rate and yield are all elements and the interests of both parties concerned. It shows that cooperation can be reached regardless of the high and low permeability by constructing the selective model .When the probability of high permeability is greater, resources development party more like to take entrustment and transfer mode; if the probability of low permeability is greater, resources development party more like to take joint development mode in the lower permeability oilfield. What model, their respective predicted permeability, expected returns, reservation utility and so on are the Influencing factors. The development of an oil block involve both the resources development party and the resources owner. These owners can develop resources by themselves or commission them to others: Transferring the concession mining title of oil block to the developers for only a limited number of years by use of an agreement. Then the developers are in charge of the developing as well as receive compensation and the owner will take over the oil block when it achieve payback period of resources. In addition to these two methods, there still another method for the owners of resources: Both sides make joint contribution under a certain proportion, cooperatively develop the oil field and obtain a share of return. In the case of the commissioned development form, the owner of the resources (denoted as Party A)require the resources development party(denoted as Party B) to make efforts to increase the permeability and recovery ratio; under the cooperated development form, party A require the development ability of party B is better than that of party A in order to extend the exploitation year(which means sustainable oilfield development)and increase the interests of party A continuously. For this reason, regardless of whether commissioned development or cooperative development, both sides have common benefits in terms of increasing permeability, recovery ratio and output. In view of the practical situation, most of the oil field exploited at present are lower permeability oil fields and the level of permeability is an significant factor for these oil fields: the higher of the permeability, the less cost of increasing the output and of improving the recovery ratio, and vise versa.

ABSTRACT: Aim: Cardiotrophin-1 (CT-1) is upregulated by hypoxemia and hemodynamic overload and is characterized by potent hypertrophic and protective properties on cardiac cells. This study aimed to investigate whether CT-1 is differentially induced in the myocardium of infants with congenital cardiac defects depending on hypoxemia. Methods & results: Infants with Tetralogy of Fallot (n = 8) or with large nonrestrictive ventricular septal defect (n = 8) undergoing corrective surgery were investigated. Expression of CT-1 was assessed at mRNA and protein levels in the right atrial and ventricular myocardium. The activation of the STAT-3 and VEGF were measured. Degradation of cardiac troponin-I served as a marker of myocardial damage. CT-1 was detected in all patients with levels negatively correlating to the arterial oxygen saturation. Higher CT-1 expression in Tetralogy of Fallot patients was associated with activation of the JAK/STAT pathway and higher cardiac troponin-I degradation. Conclusion: CT-1 may mediate myocardial hypertrophy and dysfunction in infants with congenital cardiac defects, particularly in those with hypoxemia.

Objective: Cardiac lymph is the most direct medium for analyzing metabological changes in the myocardial cell. Currently, dogs are the animals used for investigation of myocardial lymphatic function. However, questions arise when comparing and interpreting the human system to the experimental model, since the dog coronary anatomy is different from human anatomy and pulmonary lymph contamination is found in up to 81% of the cases. Swine, having similar coronary anatomy to humans, are a proven model for cardiovascular research. The purpose of this study was to investigate the cardiac lymphatic anatomy of the swine and to develop a reliable cannulation technique to collect the lymph. Methods and results: The lymphatic anatomy of 60 pigs was studied and classified and a new technique for lymphatic cannulation was developed. The cannulation success rate was 55%. In addition, no pulmonary lymph contamination was found at the cannulation site. Conclusion: We conclude that porcine myocardial lymphatics can be successfully cannulated for the investigation of myocardial lymphatic function. q 2000 Elsevier Science B.V. All rights reserved.

According to the problem that the components of HVAC (Heating, Ventilating and Air Conditioning) system have strong coupling and low energy efficiency, an optimal model for HVAC based on system energy input ratio (SEIR) is proposed. Firstly, according to each equipment characteristic, the performance curve model of each equipment power was built. Basing on these models, the performance curve model of system energy consumption was built too. Then, basing on three kinds of constraints, that is, energy conservation constraint, performance constraint, and coupling constraint, the constraint equation was built as well. Finally, by simplifying the model parameter and taking the least energy input ratio as an objective function, the optimal set point model of various equipments was established. The experimental results indicated that compared with the least energy consumption optimal method, the system power at minimal SEIR was improved by 6.89 %. It proved that the model can obtain better energy saving effect.

Objective Cardiac surgery, especially when employing cardiopulmonary bypass and deep hypothermic circulatory arrest, is associated with systemic inflammatory responses that significantly affect morbidity and mortality. Intestinal perfusion abnormalities have been implicated in such responses, but the mechanisms linking local injury and systemic inflammation remain unclear. Intestinal mast cells are specialized immune cells that secrete various preformed effectors in response to cellular stress. We hypothesized that mast cells are activated in a microenvironment shaped by intestinal ischemia/reperfusion, and investigated local and systemic consequences. Design Rat model of deep hypothermic circulatory arrest. Setting University research laboratory. Subjects Twelve- to 14-week-old male Sprague-Dawley rats. Interventions Rats were anesthetized and cooled to 16°C to 18°C on cardiopulmonary bypass before instituting deep hypothermic circulatory arrest for 45 minutes. Specimens were harvested following rewarming and 2 hours of recovery. Measurements and main results Significant intestinal barrier disruption was found, together with macro- and microscopic evidence of ischemia/reperfusion injury in ileum and colon, but not in the lungs or kidneys. Immunofluorescence and toluidine blue staining revealed increased numbers of mast cells and their activation in the gut. In animals pretreated with the mast cell stabilizer, cromolyn sodium, mast cell degranulation was blocked, and intestinal morphology and barrier function were preserved following deep hypothermic circulatory arrest. Furthermore, cromolyn sodium treatment was associated with reduced intestinal neutrophil influx and blunted systemic release of proinflammatory cytokines. Conclusion Our data provide primary evidence that intestinal ischemia/reperfusion is a leading pathophysiologic process in a rat model of deep hypothermic circulatory arrest, and that intestinal injury, and local and systemic inflammatory responses are critically dependent on mast cell activation. This identifies intestinal mast cells as central players in deep hypothermic circulatory arrest-associated responses, and opens novel therapeutic possibilities for patients undergoing this procedure.

In this paper, We apply a complex notch filter to eliminate accurately influence of Mechanical resonance frequency on theodolite performance. By comparing magnitude-frequency characteristic of system and notch filter, make two frequency characteristics counteract at the mechanical resonance frequency. Experiments show that the method can eliminate accurately mechanical resonance frequency and improve bandwidth and stability of the theodolite.

To overcome resource conflict occurred in data broadcasting among nodes which are shared and interferential each other on radio channels in sensor network, in the article we propose fuzzy Hopfield neural network(FHNN) in order to solve TDMA broadcast scheduling problem of wireless sensor network. We considered it as discrete energy minimization problem and mapped it into Hopfield neural network with the fuzzy c-means strategy to realize TDMA schedule for nodes in communication network. The fuzzy Hopfield neural network(FHNN) increases the convergence rate and decreases the processing time for broadcast scheduling problem. Simulation confirms that FHNN could be applied to the Internet of things which is covered everything all over the world. It could improve the visibility and control of the supply chain.

This paper discusses some factors which affect the dimensional limits of miniature piezoresistive catheter pressure sensors, analyses the influence of silicon wafer thickness and piezoresistor area dimensions on the sensitivity of the sensor on the basis of the mechanism of anisotropic etching of (100) silicon and the stress-distribution curve of a rectangular silicon diaphragm, and presents the design, process and passivation technology of a miniature piezoresistive catheter pressure sensor. The size of the sensor chip is 1.0 mm × 2.5 mm, its sensitivity is about 100 μV/V kPa and its resonance frequency is more than 350 kHz. The processing technology is suitable for batch manufacture.

Human resources is to develop the productive forces of the core resources during the new era. With the development of Chinese sports career, scientific research plays an important role in the development of sports. The level of the value of human resources has become an important criterion of to judge the competitiveness of sports career. In this paper, we give comprehensive evaluation model of sports science and technology human resources management by building a multi-factor multi-level fuzzy evaluation model, on a basis of pointing out the defect of the traditional econometric model of human resource value, and finally table a instructional proposal on it

As the animated short film form of the particularity, needs to create the fine style of more artistic charm. Based on the animated short film analysis of the unique fine style, example of opera theme of animation short film “farewell my concubine”, from the fine style show, opera theme select, reference and use elements of opera,consider of innovation development the fine style should be combination Chinese opera arts in todays, explore new forms of fine art style, inheritance and development of traditional Chinese culture.

On the basis of the introduction to the study of environment behavior, the paper researches the space composition design in the exhibition design; it introduces the orientation of design suitable for the space of Housing Fair through analyzing the designer's directed thinking during design, the principle and the rules in the designed work, in order to provide the authentic theory for the design; and according to the designers and the audiences' feelings, it gets their opinions and suggestions on the design, so as to find a complete and personalized space design idea for Housing Fair.

The process of gas dispersion is very complex, especially the gas of well blowout. Safety design and scale-up of these systems requires a through understanding of gas diffusion patterns and affected area. This paper provides a brief review of current techniques in numerical simulation of gas diffusion. The effects of inlet, outlet and boundary conditions are also discussed. Two-dimensional transient numerical simulations of gas injection and gas diffusion patterns in well blowout are presented. In addition, three cases of gas diffusion simulation no winds, under wind and with obstacle are provided.