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In this paper, two novel bandpass three-dimensional frequency selective surfaces (3-D FSSs) based on the waveguide structure are proposed. The first 3-D FSS is composed of a square metallic waveguide with dumbbell slots which are loaded in all waveguide walls. This design can form dumbbell slot resonators and introduce a passband below the cutoff frequency of the waveguide. The second one is constituted with square coaxial waveguide unit cells, which provides coaxial and parallel plate waveguide paths. By the interaction between two propagation paths, a quasi-elliptic response takes place and improves the frequency selectivity. The results show that both of proposed 3-D FSSs exhibit dual polarized characteristics, and can provide good frequency stability for different incidence. In addition, using 3-D printing technology, these structures are easy for fabrication.

Big data is the term applied to a new generation of software, applications and storage system, designed to derive business values. The big data phenomenon requires a revolutionary approach to the technologies deployed to ensure that timely results are delivered to create value. However, the state-of-the-art techniques for multiple dimensions big data query are facing problems as the data expand and user access pattern changes. In this paper, we will propose an optimized storage model and index scheme to provide efficient query over big multiple dimension data and multiple query patterns. We implement our scheme on HBase by introducing four components in its master node. Taking pollutant concentration data in "Green Horizon" project as the test data, we conduct numerous experiments. Experiment results show that our proposed storage model and index can help provide obvious performance improvement on multiple different queries patterns over big multiple dimension data and also has good scalability as data expand.

Dynamic model of a unicycle robot with three driven joints and controller to achieve its balanced lateral rolling motion was studied in this paper. With regard of the nonholonomic constraints, we established a dynamic model for the robot by use of Chaplygin equation. The modeling results revealed that there were 6 general velocities and 3 underactuated freedoms in the system. We considered the dynamical subsystem of the robot's balanced lateral rolling motion, and developed a controller for it by applying the principle of Partial Feedback Linearization. The controller was designed by linearizing the underactuated rolling angle of the frame, and taking the rolling angle and the rotating angle of the balance regulating flying-wheel as output. Numerical simulation together with prototype experiment were given at the end to testify the availabilities of the proposed dynamic model and the motion controller.

Analyze the disadvantages of KVM original network connection modes, and design the third network connection mode: NAT + Bridge mode. For the malicious virtual machines in user mode are difficult to detect and locate in normal way, the article proposes a strategy for detecting TCP DDOS attack based on an improved CUSUM algorithm in the KVM. This strategy detects attack of virtual machines in user mode indirectly by treating the user mode as an independent virtual machine, and determine the suspicious virtual machines in accordance with the abnormal behavior of the process, and then dynamically migrate the suspicious virtual machine to a independent NAT + bridged network environment, then detect the attack of every virtual machine in the independent network environment based on the improved CUSUM algorithm.

The s-lap is a novel gene discovered and cloned from the porcine retinal pigment epithelial cells which show earlier signs of apoptosis induced by visible light damage. However, its function is still unclear. To clarify the relationship between s-lap and apoptosis, we investigated the expression, localization of s-lap/GFP fusion protein and its effect on cell cycle in 293T cells. The plasmid expressing s-lap/GFP fusion protein was constructed and transfected into 293T cells. Then the expression and localization of s-lap/GFP fusion protein was observed by fluorescence microscope, and the effect on cell cycle were evaluated by FACS. The result shown that The recombinant plasmid can express s-lap/GFP fusion protein in 293T cells. The observation with fluorescence microscope showed that distributed of s-lap/GFP was shared in the entire cell but the priority of which was given to the nuclear, while the single GFP distributed in the cytoplasm. The cell cycle result indicated that the cell number in G2/M phase increased dramatically after s-lap/GFP transfection.

Various programs or threads, even diverse segments within one thread, differ greatly in their intrinsic performance and resource requirement. Pursuing for the highest performance potential usually leads to over-design and over-supply in most circumstances, consuming more chip size and power. This problem is exacerbated in chip multithreading architectures, where several threads execute on-chip simultaneously, by the fact that inappropriate inter-thread resource competing and sharing probably result in resource misuse. The ultimate reason for the issue lies in the absence of mathematical approach to represent the performance-resource dependency quantitatively. In this paper, we take the rename-register-file, a representative storage resource, for instance to study the performance-resource dependency features and create a straightforward, accurate, and applicable model by thread slicing and curve fitting. The model contains just four parameters but perfectly matches the benchmarks of the SPEC CPU2000 suite. We conclude with a prospective on its application in explicit, on-demand resource allocation and precise performance control.

Objective To study the functional change of peripheral nerve after repaired in different size by small gap briding (the proximal end is smaller than the distal in size), compared with epineurium suture in the same size. To explore the effect of functional reserve of peripheral nerves and the best situation for the reserve of nerve functional. Methods 10 Wistar rats served as the donors of arteris for briding. 80 Wistar rats (female), aging 2 months and weighing 200–250 g, were randomized into the 4 groups (n=20 per group). The group A was the control group, with only explosion of the right sciatic nerves. In group B, the right sciatic nerves were cut off at the level of 1.5cm distal to infrapiriform foramen, and received epineurium suture. In group C and D, the right sciatic nerves were cut off at the same level and 1cm segment of the common fibular nerves were removed from the proximal ends, the remaining were repaired with epineurium suture in group C, and with 3 mm gap artery sleeve bridging in group D.16 weeks after operation, SFI was determined by walking tract analysis. Observation under microscope of the nerve repaired site; nerve electrophysiological parameters (motor nerve conduction velocity, NCV and amplitude, AMP), TSCI (triceps surae muscle cuadros index) and the muscle force parameters, morphological features of re-innervated musculus triceps surae were detected respectively.

Purpose FDS (flexor digitorum superficialis), 1/2FDS, and palmar fascia are 3 surgical procedures commonly used to correct the deformities of claw fingers after ulnar nerve injury. FDS and palmar fascia traditionally are the more common procedures. The fomer requires the whole FDS, while the latter sometimes causes the recurrence of deformity because of its transfiguration. The of 1/2FDS spare the motor tendon and the recurernce rate is expected to be lower. A biomechanical study was performed to determine whether the biomechanical character of the three tissues is suit for surgery procedure; Another follow-up study was performed to determine the clinical outcome with the 1/2FDS loop tenodesis operation in treatment of patients with ulnar claw fingers. Methods Ten fresh symmetrical arms in adults were tested, whose palmar fascias and FDSs of each finger were cut down respectively. And then 5 of the 10 FDSs were split into two tails equally. All samples were tested by an Instron Universal Test Instrument (model AG-10TA; made in Japan), which would control the stress and strain exerted on the test sample automatically, and print out the data of each load, elongation, stress and strain, then the curve of stress compared with elongation. 5 patients presented 5 affected 5 hands with ulnar claw fingers, had the 1/2FDS loop tenodesis procedure from May 1990 to March 2010. Each hand was assessed before surgery and at follow-up evaluation by predetermined angle measurements, power grip, motion, mechanical function, and patients'satisfaction. Results Biomechanical study showed that FDS and that in half could endure large amount of stress exerted on it with less elongation in size. The difference between half FDS with palmar fascia group was statistically significant (P0.05)f, but it was significant weaker in half FDS than palmar fascia(P

According to the organizational behavior and organizational commitment theory in human resource management, as well as the two human factors (i.e., employee individual characteristics and organizational commitments) that affact the employee's turnover intention, we carried out the questionnaire survey in which the subjects were randomly selected from three enterprises. The survey data were consequently processed using factor analysis and multiple regression analysis in SPSS statistical analysis software, and a regression model for employee's turnover intention has been constructed from the perspective of organizational commitment in order to put forward policy recommendations of retaining and introducing talents for the enterprise management in China.

The rapid development of computer and network communication technology makes it possible that the protection devices in the underground coalmine distribution networks solve the complicated faults in independent or/and cooperative way. In China, though the mining protective relaying devices have been developed greatly, power faults such as over-zone tripping, failure and false operation and various of cable faults is common in coalmine. In order to solve these problems, the concept of Cyber-Physical System is introduced into underground relay protection system. In this paper, a novel Cyber-Physical System based relay protection system for underground coalmine distribution networks is proposed. And the structure and features are presented. The greatest superiority of the new proposed system is the global sharing and exchange of data and information of coalmine distribution network, based on which theories of three steps over current protection and selective electrical leakage protection and their executing modes are improved sharply, therefore, the speed and precision of protection functions based on these theories could be increased.

Adipose tissue is derived from the embryonic mesenchyme and can be isolated easily. The purpose of this study was to investigate the multipotent ability of adipose-derived mesenchymal stem cells and to investigate the molecular characterization of adipose-derived mesenchymal stem cells during chondrogenic differentiation in vitro. Our results showed that adipose-derived mesenchymal stem cells have the ability to differentiate into adipogenic, osteogenic, and chondrogenic cells with adipogenic, osteogenic, and chondrogenic medium in vitro. The expression of chondrogenic related molecules were detected by RT-PCR analysis during chondrogenic differentiation. These studies demonstrate that human adipose-derived mesenchymal stem cells have the multipotentiality and adipose tissue may represent a novel approach to form tissue engineering cartilage to heal the damage cartilage.

In order to ensure water source safety of the Yangtze River in areas of Jiangsu, a ComGIS-based monitoring and warning system was developed. The system integrated the whole transaction flow of water source monitoring and warning (online monitoring, water quality modeling, effect analysis and countermeasure) with GIS. The integrated system has been proven helpful and efficient in ensuring water source safety of the Yangtze River.

Coal mine spontaneous burning has led to resources waste, meanwhile it also causes air pollution and some geological disasters. Now remote sensing is becoming an important approach of monitoring the coal fire. The thermal anomalies points are extracted by three methods in this article that is multi-temporal MNF transformation, multi-threshold density slice and differentiated method. Combining with GIS the information of the coal fire extracted are qualified compared and analyzed, then find the best method to extract the high thermal anomalies points is the difference method, and helped by the MNF transformation areas where affected by coal fires extracted are more accuracy than directly using density slice.

recently, Shen, Lin, and Hwang proposed a modified Yang-Shieh's password authentication scheme to enhance security. In 2004, Yang and Chen et al. point out that Shen-Lin-Hwang's scheme was vulnerable to the forged login attack. Later, Wang and Li present a new efficient timestamp-based remote user authentication scheme via further modified Shen-Lin-Hwan's scheme. And they also claimed that their new modified scheme could withstand the forged login attack. However, in this paper, we show that the Yang and Li`s improvement scheme is still vulnerable to the reflection attack, and propose our improvement scheme.

In this paper, we provide a new generalized construction method for (n, m, t) resilient functions with satisfying synthetical cryptographic criteria. These synthetical cryptographic criteria include high nonlinearity, good resiliency, high algebraic degree, and nonexistence of nonzero linear structure and so on. The construction is based on the use of linear error-correcting code. Given a linear [u, m, t + 1] code and its dual code [u, u - m, t/sup */ + 1], we show that it is possible to construct (n, m, d) resilient functions with satisfying synthetical cryptographic criteria, where d = min(t, t/sup */) and n > u > 2m. The method provides a new idea in designing cryptographic functions.