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Now showing items 1 - 16 of 172

  • DOUBLE-LAYER STRANDED ALL-DRY TYPE OPTICAL CABLE

    A double-layer stranded all-dry type optical cable comprises a central strengthening component, a double-layer stranded cable core, a water blocking tape (5), reinforcing yarn (6), and an outer sheath layer (7). The central strengthening component is externally wound with water blocking yarn (4); the double-layer stranded cable core is formed through SZ stranding of inner and outer all-dry type loose sleeve tubes (2), and comprises three structures: a structure of six tubes at the inner layer and twelve tubes at the outer layer, a structure of seven tubes at the inner layer and thirteen tubes at the outer layer, and a structure of nine tubes at the inner layer and fifteen tubes at the outer layer; each of the loose sleeve tubes (2) comprises twelve optical fibers (1) and 1 to 2 pieces of water blocking yarn (4) and contains no ointment; the water blocking tape (5) is wrapped between the inner and outer all-dry type loose sleeve tubes (2) and outside the double-layer stranded cable core; the surface of the water blocking tape (5) outside the double-layer stranded cable core is wound with the reinforcing yarn (6); a tearing rope (8) is provided on the reinforcing yarn (6); and the outer sheath layer (7) is provided outside the reinforcing yarn (6). The entire optical cable is in an all-dry type structure
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  • The g-good-neighbor and g-extra diagnosability of networks

    Wang, Shiying   Wang, Mujiangshan  

    Diagnosability of a multiprocessor system is an important research topic. The system and interconnection network has a underlying topology, which usually presented by a graph G =3D (V, E). In 2012, a measurement for fault tolerance of the graph was proposed by Peng et al. This measurement is called the g-good-neighbor diagnosability that restrains every fault-free node to contain at least g fault-free neighbors. In 2016, Zhang et al. proposed a new measurement for fault diagnosis of the graph, namely, the g-extra diagnosability, which restrains that every fault-free component has at least (g + 1) fault-free nodes. A fault set F subset of V is called a g-good-neighbor faulty set if the degree d(v) >=3D g for every vertex v in G - F. A g-good-neighbor cut of G is a g-good-neighbor faulty set F such that G - F is disconnected. The minimum cardinality of g-good-neighbor cuts is said to be the g-good-neighbor connectivity of G. A fault set F subset of V is called a g-extra faulty set if every component of G - F has at least (g + 1) vertices. A g-extra cut of G is a g-extra faulty set F such that G - F is disconnected. The minimum cardinality of g-extra cuts is said to be the g-extra connectivity of G. The g-good-neighbor (extra) diagnosability and g-good-neighbor (extra) connectivity of many well-known graphs have been widely investigated. In this paper, we show the relationship between the g-good-neighbor (extra) diagnosability and g-good-neighbor (extra) connectivity of graphs. (C) 2018 Elsevier B.V. All rights reserved.
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  • The h-extra connectivity of k-ary n-cubes

    Liu, Aixia   Wang, Shiying   Yuan, Jun   Ma, Xue  

    Reliability evaluation of interconnection network is important to the design and maintenance of multiprocessor systems. The h-extra connectivity k(h)(G) is an important subject for a multiprocessor system's reliability to tolerate faulty processors. It is defined as the minimum cardinality of a set of vertices in G, whose deletion disconnects G and leaves every remaining component with more than h vertices. In this paper, we investigate the h-extra connectivity of k-ary n-cube Q(n)(k), a well-known interconnection network proposed for multiprocessor systems, and show k(h)(Q(n)(k)) =3D {(h+1)2n - 2h - ((h)(2)), if 0 <=3D h <=3D n, n >=3D 2, k >=3D 4; (h+1)2n - 3h- ((h)(2)), if 0 <=3D h <=3D n, n >=3D 3, k =3D 3, except k(2)(Q(2)(4)) =3D 6. (C) 2019 Elsevier B.V. All rights reserved.
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  • The h-Extra Connectivity and Diagnosability of Locally Twisted Cubes

    Wang, Shiying   Ren, Yunxia  

    The connectivity and diagnosability of a system or a network are two important measures. In 1996, Fabrega and Fiol proposed the h-extra connectivity of the network G =3D (V, E), which is necessary for (h, m)-diagnosability of networks. In 2016, Zhang et al. proposed the (h, m)-diagnosability of G that requires every component of G - S has at least (h + 1) nodes for S subset of V. The locally twisted cube LTQ(n) is applied widely. There are many studies on LTQn. In this paper, we show that the h - extra connectivity of LTQ(n) is n - 1/2h(h - 2n + 3) for n >=3D 5 and 0 <=3D h <=3D n - 3, and m of the (h, m)- diagnosability of LTQ(n) is n - 1/2h(h - 2 n + 1) for n >=3D 5, 0 <=3D h <=3D n - 3 in the PMC model and n >=3D 7, 0 <=3D h <=3D n - 3 in the MM* model, respectively.
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  • Diagnosability of Bubble-Sort Star Graphs with Missing Edges

    Wang, Shiying   Wang, Yingying  

    The diagnosability of a multiprocessor system plays an important role. The bubble-sort star graph BSn, has many good properties. In this paper, we study the diagnosis on BSn, under the comparison model. Following the concept of the local diagnosability, the strong local diagnosability property is discussed. This property describes the equivalence of the local diagnosability of a node and its degree. We prove that BSn, (n >=3D 5) has this property, and it keeps this strong property even if there exist (2n - 5) missing edges in it, and the result is optimal with respect to the number of missing edges.
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  • The strong connectivity of bubble-sort star graphs

    Wang, Shiying   Wang, Mujiangshan  

    Mass data processing and complex problem solving have higher and higher demands for performance of multiprocessor systems. Many multiprocessor systems have interconnection networks as underlying topologies. The interconnection network determines the performance of a multiprocessor system. In the system where the processors and their communication links to each other are likely to fail, it is important to consider the fault tolerance of the network. At this background, the strong connectivity of the network is proposed. For the strong connectivity, it allows both processors and communication links to fail at the same time. For the traditional connectivity, the connectivity only allows processors failure and the edge connectivity only allows communication link failure. In the design of an interconnection network, one of the most fundamental considerations is the connectivity of the network. In this paper, we give the definition of the strong connectivity of the network and some properties of the strong connectivity of the network. As a favorable topology structure of interconnection networks, the n-dimensional bubble-sort star graph BSn has many good properties. We give some strong connectivity of BSn, too.
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  • Effects of Silver Ions on High-Speed Electroless Copper

    Wu, Minxian   Xu, Chao   Wang, Wenchang   Wang, Shiying   Mitsuzaki, Naotoshi   Chen, Zhidong  

    Formaldehyde is one of the mostly used reductants in electroless copper. Silver ions were introduced into the plating bath to improve the plating rates and the film ductility. The linear scan voltammetry was used to study the influence of silver ions on the reduction behavior of copper, which indicates that the silver ions were co-reduced with copper. The incorporation of silver increased copper deposition rate. The plating rate increased from 17 mu m h(-1) in the silver-free solution to 29 mu m h(-1) as 25 mg L-1 Ag2SO4 was added. Folding tests were performed to illustrate the effect of silver on film ductility. The addition of silver ions in the plating baths improved the folding endurance of copper layers. The stability of the plating bath containing 20 mg L-1 Ag2SO4 was investigated using UV/Vis absorption spectroscopy. The bath was stable for at least 2 weeks.
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  • The g-extra connectivity and diagnosability of crossed cubes

    Wang, Shiying   Ma, Xiaolei  

    Connectivity and diagnosability are two important parameters for the fault tolerant of an interconnection network G. In 1996, Fabrega and Fiol proposed the g-extra connectivity of G. In 2016, Zhang et al. proposed the g-extra diagnosability of G that requires every component of G - S has at least (g + 1) vertices. The g-extra connectivity of G is necessary for g-extra diagnosability of G. In this paper, we show that the g-extra connectivity of the crossed cube CQ(n) is n(g + 1) - 1/2g(g + 3) for n >=3D 5, 0 <=3D g <=3D 2 left perpendicularn/2right perpendicular and the g-extra diagnosability of CQ(n) is (n - 1/2g)(g+ 1) under the PMC model for n >=3D 5, 0 <=3D g <=3D left perpendicularn/2right perpendicular and the MM* model for n >=3D 7, 0 <=3D g <=3D left perpendicularn/2right perpendicular
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  • SUPERFINE OPTICAL FIBER LOOSE TUBE AND MANUFACTURING METHOD THEREOF

    A method for manufacturing a superfine optical fiber loose tube and a superfine optical fiber loose tube manufactured according to the manufacturing method. The manufacturing method comprises the following steps: separately placing optical fiber unit plates equipped with colored optical fibers (1) on a same group of optical fiber pay-off racks (4), and the optical fiber pay-off racks (4) enabling 1 to 12 colored optical fibers (1) to pass through an optical fiber collection mold (5) at a constant speed; an extruder (6) squeezing molten low smoke halogen free-flame retardant polyethylene materials into an integrated pipe extruding mold in a machine head of the extruder (6), so as to obtain a formed loose tube (2) by squeezing; the optical fiber collection mold (5) dragging the colored optical fibers (1) to the extruder (6), so that the colored optical fibers (1) pass through an integrated pipe extruding mold center at a constant speed, and all the colored optical fibers (1) enter the formed loose tube (2) to form the loose tube (2) containing the colored optical fibers (1), and filling water-blocking gel (3) into the loose tube (2); the loose tube (2) containing the colored optical fibers (1) and the water-blocking gel (3) successively experiencing two-stage cooling of a first water tank (7) and a second water tank (8) for shaping, so as to manufacture the shaped loose tube (2), and then using compressed air to dry a surface of the loose tube (2); using a caliper and measuring device (9) to detect an outer diameter of the loose tube (2) on line, the loose tube (2) that succeeds in the detection being a superfine optical fiber loose tube finished product; and a dragger (10) dragging the superfine optical fiber loose tube finished product to a wire winding machine (11), and the wire winding machine (11)keeping the superfine optical fiber loose tube finished product in a tool plate. The manufacturing method can reduce an outer diameter of whole optical cables, saves space of a communications channel, enables the loose tube to be easily stripped, and shortens the construction time.
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  • THE CONNECTIVITY AND NATURE DIAGNOSABILITY OF EXPANDED k-ARY n-CUBES

    Wang, Mujiangshan   Lin, Yuqing   Wang, Shiying  

    Connectivity and Diagnosability play an important role in measuring the fault tolerance of interconnection networks. As a topology structure of interconnection networks, the expanded k-ary n-cube XQ(n)(k) has many good properties. In this paper, we prove that (1) the connectivity of XQ(n)(k) is 4n; (2) the nature connectivity of XQ(n)(k) is 8n - 4; (3) the nature diagnosability of XQ(n)(k) under the PMC model and MM* model is 8n - 3 for >=3D 2.
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  • Ultrasound Molecular Imaging of Inflammation in Mouse Abdominal Aorta

    Wang, Shiying   Unnikrishnan, Sunil   Herbst, Elizabeth B.   Klibanov, Alexander L.   Mauldin, Frank William, Jr.   Hossack, John A.  

    Objectives: The aimof this studywas to demonstrate a newclinically translatable ultrasound molecular imaging approach, modulated acoustic radiation forcebased imaging, which is capable of rapid and reliable detection of inflammation as validated in mouse abdominal aorta. Materials and Methods: Animal studies were approved by the Institutional Animal Care and Use Committee at the University of Virginia. C57BL/6 mice stimulated with tumor necrosis factor a, or fed with a high-fat diet, were used as inflammation (MInflammation) and diet-induced obesity (DIO) (MDIO) models, respectively. C57BL/6 mice, not exposed to tumor necrosis factor a or DIO, were used as controls (MNormal). P-selectin-targeted (MBP-selectin), vascular cell adhesion molecule (VCAM)-1-targeted (MBVCAM-1), and isotype control (MBControl) microbubbles were synthesized by conjugating anti-P-selectin, anti-VCAM-1, and isotype control antibodies to microbubbles, respectively. The abdominal aortas were imaged for 180 seconds during a constant infusion of microbubbles. A parameter, residual-to-saturation ratio (RSR), was used to assess P-selectin and VCAM-1. Statistical analysis was performed with the Student t test. Results: For the inflammation model, RSR of the MInflammation + MBP-selectin group was significantly higher (40.9%, P < 0.0005) than other groups. For the DIO model, RSR of the MDIO + MBVCAM-1 group was significantly higher (60.0%, P < 0.0005) than other groups. Immunohistochemistry staining of the abdominal aorta confirmed the expression of P-selectin and VCAM-1. Conclusions: A statistically significant assessment of P-selectin and VCAM-1 in mouse abdominal aorta was achieved. This technique yields progress toward rapid targeted molecular imaging in large blood vessels and thus has the potential for early diagnosis, treatment selection, and risk stratification of atherosclerosis.
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  • Fabrication of Two Flow Phantoms for Doppler Ultrasound Imaging

    Zhou, Xiaowei   Kenwright, David A.   Wang, Shiying   Hossack, John A., Jr.   Hoskins, Peter R.  

    Flow phantoms are widely used in studies associated with Doppler ultrasound measurements, acting as an effective experimental validation system in cardiovascular-related research and in new algorithm/instrumentation development. The development of materials that match the acoustic and mechanical properties of the vascular system is of great interest while designing flow phantoms. Although recipes that meet the flow phantom standard defined by the International Electrotechnical Commission 61685 are already available in the literature, the standard procedure for material preparations and phantom fabrications has not been well established. In this paper, two types of flow phantoms, with and without blood vessel mimic, are described in detail in terms of the material preparation and phantom fabrication. The phantom materials chosen for the two phantoms are from published phantom studies, and their physical properties have been investigated previously. Both the flow phantoms have been scanned by ultrasound scanners and images from different modes are presented. These phantoms may be used in the validation and characterization of Doppler ultrasound measurements in blood vessels with a diameter above 1 mm.
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  • Ultrasonographic Features of Lower-Limb Joints in Gout

    Zhang, Weijing   Jin, Zhibin   Xiang, Wenjing   Wu, Min   Wang, Shiying   Zhang, Huayong   Zhang, Pingyang  

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  • The g-good-neighbor and g-extra diagnosability of networks

    Wang, Shiying   Wang, Mujiangshan  

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  • Regulating platform competition in two-sided markets under the O2O era

    Wang, Shiying   Chen, Huimiao   Wu, Desheng  

    Online-to-offline (O2O) services permeate our daily life and consumption along with the advanced technology in e-commerce. In this study, motivated by taxi-hailing market case, we analyze the effect of government regulations on competition in two-sided markets featured network externality under the O2O era. First, a model with Hotelling specification is formulated to describe the competition in taxi-hailing markets using subsidies as decision variables. In the model, platforms subsidize two sides agents labeled drivers and passengers, and the subsidies are given based on whether a state of membership or every transaction. Second, government regulations are introduced into the model by adding corresponding modification into agents' utility, and new consequent market equilibriums are compared with the benchmark status. Major findings of this work include: i) the effects of price adjustments regulation depend largely on relative size of mutual network externalities, which causes a negative impact on social welfare except for extreme size level; ii) butt joint with official platforms brings down platforms' cost in both sides so that companies make more profits, where social welfare including consumer surplus and profits increases; iii) forbiddance setting in time limited usage scarifies a little economic effectiveness to ensure better safety.
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  • Diagnosability of arrangement graphs with missing edges under the MM* model

    Wang, Shiying   Ma, Xiaolei  

    Diagnosability is an important parameter to measure the fault tolerance of interconnection networks. Arrangement graph is a generalisation of the star graphs A(n,k) yet it is more flexible in its size than the star graphs. In this paper, we study the local diagnosability of A(n,k) and show that it has the strong local diagnosability property even if there exist (k - 1) (n - k) - 1 missing edges in it under the MM* model, and the result is optimal with respect to the number of missing edges. [GRPAHICS]
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