To make up for the insufficiency and instability of contact dispensers that are used fluid dispensing in microelectronic packaging, a noncontact jetting dispenser driven by piezostack actuator is introduced this paper. After describing structural components operating principle mechanism, model presented to discuss dynamic properties analyze key parameters proposed dispenser. The ANSYS simulation software design displacement amplifier, which an important component maximum output 323 μm...

Many studies conducted in non-virtual activities have shown that flow significantly influences performance, yet virtual often reveal only a weak association. This paper begins by building theoretical explanatory model, and then conducts 3 empirical to explore this question. Study 1 exams the mechanism of association two activities. 2 tests effectiveness potential approach strengthen In we applied our proposed model design optimize VR tennis game. Results show influence on performance was not...

In order to identify the fault of rotating machine effectively, a new method based on morphological filter optimized by particle swarm optimization algorithm (PSO) and nonlinear manifold learning local tangent space alignment (LTSA) is proposed. Firstly, signal purified filter; filter’s structure element (SE) selected PSO method. Then filtered signals are decomposed empirical mode decomposition (EMD) method, extract features mapped into LTSA character features; then support vector (SVM)...

Background: Catheter-related bladder discomfort (CRBD) to an indwelling urinary catheter is defined as a painful urethral discomfort, resistant conventional opioid therapy, decreasing the quality of postoperative recovery. According anatomy, branches sacral somatic nerves form afferent urethra and triangle, which deriving from ventral rami second fourth spinal nerves, innervating muscles sphincter perineum pelvic floor; well providing sensation penis clitoris in males females, including...

Electrohydrodynamic direct-writing (EDW) is a developing technology for high-resolution printing. How to decrease the line width and improve deposition accuracy of direct-written patterns has been key promotion further application EDW. In this paper, an airflow-assisted spinneret electrohydrodynamic was designed. An assisted laminar airflow introduced EDW process, which provided additional stretching constraining force on jet reduce surrounding interferences enhance stability. The flow field...

The paper proposes a novel hybrid method that extends previous work incorporating the fractionally cointegrated vector autoregressive and permanent-transitory decomposition model. Using method, we investigate whether rapid rise in China’s housing prices is trend or cyclical fluctuation as well there exists price bubble. findings indicate fractional cointegration relationship between macroeconomic fundamentals China, fundamental value of determined by factors. In particular, upward has...

The housing provident fund system has provided tremendous assistance in helping users take out loans for home purchase services since its inception. Currently, as digitalization and information technology continue to strengthen, the country emphasizes need use digital (e.g., big data, artificial intelligence, etc.) extensively government management drive innovation management, service, supervision. Profile recommendation technologies were mostly used field of financial technology, such...

Path planning is an effective means to improve the operational effectiveness of aircrafts. A reasonable estimation and description threats existing in operation space are significant before generating a specific path for aircraft. To avoid depending on experts' experience excessively when we evaluate threat situations, Index Based Threat Modeling Method named IBTMM proposed. uses indexes defense systems measure aircraft faces gives dynamic degree which changing according aircraft's flying...

Choosing the appropriate method to identify turning points is critical for investors and policymakers. We propose a novel hybrid model combining dual long memory with structural breaks in mean of stock market China United States. The results show that models accounting break perform well point detection. Notably, proposed generates superior in-sample matching out-sample forecasts SSECI over those obtained from competing ARFIMA models. In contrast, DJIA better explained by volatility....

Influenza viruses are divided into three types: A, B and C. Among them, type A virus is the most virulent human pathogen causes severe disease. In this paper, we propose a new time series model for influenza DNA sequence, i.e.chaos game representation (CGR) radians series. The CGR coordinates converted model, long-memory ARFIMA(p,d,q) introduced to simulate model. We select randomly 10 H1N1 sequences H3N2 in analysis. find these data remarkably long-range correlation fit reasonably by also...

This study suggests a structural modification of the basic ARFIMA-GARCH model by allowing for time-varying baseline mean and, especially, symmetric threshold GARCH. By applying it to inflation G7 countries, we find that past excessive positive or negative shocks have impacts on future volatility and GARCH persistence. Compared with model, in this has superior performances identifying characterizing changes shocks.

It was the base of model which accurately determined relationship each part armament system combat capability simulation model.In this paper, structural equation modeling method (SEM) used to determine relationships between various components model.The specific application SEM processes and procedures were discussed in detail.Thereby foundation for establishing established accurately.

An investigation was reported of a new attempt in the fabrication an ultrafine abrasive tool for vertical spindle grinding. The principle sol-gel applied to granulate ultra-fine abrasives order reduce their aggregation. granulated were then added resin bonds, thereby forming grinding disks. Before grinding, disks dressed expected flatness using brazed diamond pad. used grind silicon wafers and natural granite. Both dressing conducted on high precision machine. After morphologies workpiece...

While strategic CSR is highly praised for potentially creating a win-win situation business and society by practitioners academics, surprisingly little known about how to implement effectively. Using case study method reveal the implementation mechanism, we track activities conducted two Chinese property enterprises when participating in development of communities which they built residences. We find that 1) By extending value chain from solely commercial creation include also social related...

Traffic accident investigators usually pay more attention to drivers' skill and traffic rules in the analysis of various incidents, while they tend ignore capability handling special situations. There is evidence that professional general skills are almost at same level main difference between them lies situation characterized by sudden, haphazard, variability stressful, which an important factor threats driving safety. Therefore, safety critically dependent on proper disposal situations;...