The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In order to improve the overall performance of Shanghai port, this paper proposes a systematic evaluation model to assess the competitiveness of Shanghai Port with 25 input indicators and 6 output indicators. The proposed evaluation model reduces the dimensions of the indices by Factor Analysis, and uses the data envelopment analysis (DEA) approach to validate the data from 2008 to 2013. By implementing...
Over the last few years, industry and academia have been shifting towards computer aided models for seismic interpretation because manual labeling and salt dome delineation is becoming very time consuming and labor intensive as the volume of seismic data is in the order of tera-bytes. In this paper, we have proposed an edge-based active contour with an arc length penalty using level set implementation...
This paper researches the Ad Hoc network OLSR (Optimized Link State Routing Protocol) optimal link-state routing protocol, and uses a mathematical point of collection to analyze the MPR (Multi Point Relay, MPR) set selection problem by a node and its neighbors which connect the node of containing a subset of the set. By calculating the remaining independent sub-set of the set of generated MPR relay...
A reference network is topologically identical to the existing network in which the generators and loads are not changed while the transmission line capacity will be optimized. By applying a reference network, the optimal transmission capacities of each line could be identified, as it takes annual operational and transmission costs into consideration. A reference network provides a standard to evaluate...
A control algorithm of basic PID neural network (PIDNN) is introduced. A set of PID parameters is introduced into PIDNN to improve the processing ability of Proportional, Integral and Differential neurons. An additional momentum is also introduced into PIDNN to improve the learning efficiency of neural networks and to avoid trapping into local optimum. Also, an enhanced particle swarm optimization...
Several different critical current density (7c:30A/cm2∼4000A/cm2) of Nb/Al-AlOx/Nb Josephson junctions were fabricated by standard selective niobium etch process (SNEP) for application of dc SQUID magnetometers. The subgap leakage factor Vm of most junctions is larger than 30 mV. Based on the good tunneling properties of junctions, we designed and fabricated a dc SQUID with loop inductance of 140...
The proximal classifier with consistency (PCC) isan improvement of generalized eigenvalue proximal support vector machine (GEPSVM), ensuring consistency ignored inGEPSVM. However, similar to many other machine learning methods, PCC uses only the global information and the eigenvalue problem need to be solved, which can not classify small sample size (SSS) problem effectively. By exploiting both global...
Objective: To investigate the multi-detector computed tomography (MDCT) manifestations of the normal sigmoid mesocolon. Methods: Fifty cases were studied to evaluate the 64-detector computed tomography appearances of the normal sigmoid mesocolon. Results: (1) The inferior mesenteric artery (IMA) and inferior mesenteric vein (IMV) were identified on axial, coronal and sagital MDCT images in 50 cases...
This paper presents a method to describe nonlinear oscillation of power system. Specifically, this paper uses the con trolling mode which is identified by the extended equal-area criterion (EEAC). The energy of center equal point (CEP) or far end point (FEP) in each swing is used to express the oscillation energy of the controlling mode, so the trend of swing energy variations can be used to show...
Purpose: To explore the applied value of magnetic resonance background suppression diffusion weighted imaging (DWIBS) for preoperative staging of rectal cancer. Methods: 39 cases of rectal cancer, which were confirmed by colonoscopy, underwent DWIBS before the surgery. The data was divided into three groups (T2, T3, T4) on the basis of pathological results about T-stage of rectal cancer. The relative...
Purpose: Discussing the effect of magnetic resonance diffusion weighted imaging with background signal suppression that used to evaluate the efficacy of angiogenesis inhibitor endostatin that applied in the treatment of rabbit liver VX2 hepatic transplantation model. Method: Tumor-bearing rabbits were randomly divided into two groups, each group with eight rabbits, saline (10ml / d) was injected into...
Using the new uncertainty indexes from Baker et al. (2012), we investigate the effect of economic policy uncertainty in the United States on export duration of Chinese industrial enterprises. The empirical results show that economic policy uncertainty in the United States is negatively related to the duration of export and the conclusion is robust when we adopt different economic policy uncertainty...
With the continuous increase of corporate and personal needs of the Internet, the data center industry has entered a stage of large-scale planning and construction. It is expected that in 2015 the national market benefit of data centers will be more than 50 billion. As the business development, the power consumption of data center also increased year by year. But traditional technique and rough construction...
Objective: To investigate the relationship of development of cochlear nerve and inner ear in children with congenital sensorineural hearing and to explore the relationships of between development of cochlear nerve with the internal auditory canal size and patients' age. Methods: MR examinations were performed in 43 children with profoundly sensorineural hearing loss and 12 normal hearing children...
Comparing the imaging features on the ordinary fa-value and high-b-value DWIBS with that on the enhanced imaging, to explore the value of 3.0T MR high-b-value diffusion weighted imaging with background suppression (DWIBS) in detecting the cerebral metastases. 41 patients with cerebral metastases confirmed by clinically and pathologically were collected. All the patients underwent conventional MRI...
Visual odometer or wheel speed sensor (WPS) is often used for vehicle positioning when GPS signals are obstructed for a long time in urban complex environments. Because they have always accumulated error, an automatic calibration system of vehicle motion error under GPS blind area is proposed. Firstly, when a vehicle moves to the detected area, the self-organizing network based on Zigbee sends signals...
The exploration of petroleum reservoirs has a close relationship with the identification of salt domes. To efficiently interpret salt-dome structures, in this paper, we propose a method that tracks salt-dome boundaries through seismic volumes using a tensor-based subspace learning algorithm. We build texture tensors by classifying image patches acquired along the boundary regions of seismic sections...
For data centers with limited power supply, restricting the servers' power budget (i.e., The maximal power provided to servers) is an efficient approach to increase the server density (the server quantity per rack), which can effectively improve the cost-effectiveness of the data centers. However, this approach may also affect the performance of applications in servers. Hence, the prerequisite of...
Two-photon and four-photon interference are realized in an interferometric fiber optical gyroscope, respectively. The visibility of four-photon interference fringe is 29.4% with a high coincidence count rate of 1000 per minute.
We demonstrate a down-conversion-based twin photon source pumped by a 10 GHz repetition-rate-tunable comb laser at 1553 nm wavelength. We show high Hong-Ou-Mandel interference visibilities, which are free from the pump-power induced degradation.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.