摘要:
Apparatus for designing a virtual VLAN network includes a database representing a plurality of VLAN networks in a spanning tree topology, each of the networks being formed of a plurality of VLAN member nodes interconnected by links. In response to a network configuration request from a communications network, control circuitry determines the costs of the links, and then determines the least cost unicast paths by using a shortest path algorithm. A search is made through the least cost unicast paths for detecting a loop. If at least one loop is detected, a link of highest cost of the loop is blocked. All unicast paths of the blocked link are reestablished through links that circumvent the blocked link. A spanning tree built up with all the links accommodating the least cost unicast paths is established. Configuration command is sent to the network for configuring it according to the established spanning tree.
摘要:
A vacuum-cleaner suction tool includes a sucking portion for sucking up dust on a surface to be cleaned, a joint portion having one end connected to the upper side of the sucking portion and the other end provided with a connection pipe, and an agitator disposed within the sucking portion for scraping dust off the surface. The opening, the joint portion, and the connection pipe each have a channel portion allowing sucked-up dust to pass therethrough. The joint portion is configured to be turnable, relative to the sucking portion, in a horizontal direction substantially parallel to the surface to be cleaned to such an extent that the longitudinal central axis of the sucking portion becomes substantially parallel to the longitudinal central axis of the connection pipe, whereby the forward end of the sucking portion, from left to right, can be brought into close contact with wall surfaces so that dust liable to collect in corners can be fully sucked up.
摘要:
Disclosed is a process for leaching copper from copper sulfide using bacteria, which ensures that the rate of leaching of copper increases to reduce the leaching time period and that the rate of leaching of primary copper sulfide contained in ores is increased. The process comprises using an acid leaching solution that includes both or any one of iron oxidizing bacteria and sulfur oxidizing bacteria in a concentration of 106 microbes/mL, the acid leaching solution having a redox potential of from 550 to 750 mV and 5 g/L or more of iron, the ratio of trivalent iron ions to bivalent iron ions (Fe3+/Fe2+) in the acid leaching solution being 50 or more.
摘要翻译:公开了一种使用细菌从铜硫化物中浸出铜的方法,其确保铜的浸出速率增加以减少浸出时间,并且矿石中所含的初级硫化铜的浸出速率增加。 该方法包括使用含有浓度为106微克/ mL的铁氧化细菌和硫氧化细菌中的任一种或任一种的酸浸液,酸浸液具有550-750mV的氧化还原电位和5g / L 或更多的铁,酸浸液中三价铁离子与二价铁离子(Fe3 + / Fe2 +)的比例为50以上。
摘要:
Provided is a plating method of a circuit substrate comprising a conductive pattern in which a metal layer containing at least silver and copper is exposed on an outer surface. The plating method comprises: step (A) of treating the circuit substrate with a first liquid agent containing an oxidizing agent; step (B) of treating the circuit substrate after the step (A) with a second liquid agent which dissolves copper oxide, and thereby removing copper oxide from the conductive pattern's surface; step (C) of treating the circuit substrate after the step (B) with a third liquid agent whose rate of dissolving silver oxide (I) at 25° C. is 1000 times or more faster than its rate of dissolving copper (0) at 25° C., and thereby removing silver oxide from the conductive pattern's surface; and step (D) of performing electroless plating on the conductive pattern of the circuit substrate after the step (C).
摘要:
A metallized substrate having, disposed in the order mentioned: a ceramics substrate; a high-melting point metal layer; a base nickel plating layer; a layered nickel-phosphorous plating layer; a diffusion-inhibiting plating layer; and a gold plating layer. The base nickel plating layer being any one of a nickel plating layer, a nickel-boron plating layer, or a nickel-cobalt plating layer. The diffusion-inhibiting plating layer being any one of a columnar nickel-phosphorous plating layer, a palladium-phosphorous plating layer, or a palladium plating layer. According to the above composition, even after heating the semiconductor chips in a mounted state, the metallized substrate can make the connection strength of wire bonding favorable.
摘要:
Disclosed is a network system comprising: a plurality of routers 704 and 705 connected to each other through a network; pseudo redundant configuration setting means 702 and 703 which are connected respectively to the routers and which perform a communication using a redundancy protocol with respective routers; and association control means 701 connected to the pseudo redundant configuration setting means 702 and 703, wherein when a server 716 is a backup server and its backup state needs to be maintained, the pseudo redundant configuration setting means 703 issues a signal for maintaining a standby state to the router 705, and when servers are switched between a standby state and operating state, the association control means 701 transmits a switching instruction for switching between a standby state and operating state to the pseudo redundant configuration setting means 702 and 703.
摘要:
Disclosed is a network system comprising: a plurality of routers 704 and 705 connected to each other through a network; pseudo redundant configuration setting means 702 and 703 which are connected respectively to the routers and which perform a communication using a redundancy protocol with respective routers; and association control means 701 connected to the pseudo redundant configuration setting means 702 and 703, wherein when a server 716 is a backup server and its backup state needs to be maintained, the pseudo redundant configuration setting means 703 issues a signal for maintaining a standby state to the router 705, and when servers are switched between a standby state and operating state, the association control means 701 transmits a switching instruction for switching between a standby state and operating state to the pseudo redundant configuration setting means 702 and 703.
摘要:
Provided is a plating method of a circuit substrate comprising a conductive pattern in which a metal layer containing at least silver and copper is exposed on an outer surface. The plating method comprises: step (A) of treating the circuit substrate with a first liquid agent containing an oxidizing agent; step (B) of treating the circuit substrate after the step (A) with a second liquid agent which dissolves copper oxide, and thereby removing copper oxide from the conductive pattern's surface; step (C) of treating the circuit substrate after the step (B) with a third liquid agent whose rate of dissolving silver oxide (I) at 25° C. is 1000 times or more faster than its rate of dissolving copper (0) at 25° C., and thereby removing silver oxide from the conductive pattern's surface; and step (D) of performing electroless plating on the conductive pattern of the circuit substrate after the step (C).