摘要:
A method of detecting the location of a failure (e.g., a sudden leak) in a fluid pipeline network, which can be suitably used for estimation of the location of a failure in a water pipeline network, includes the steps of periodically measuring a flow rate or fluid pressure with sensors arranged at a plurality of measuring points along a pipeline in a water pipeline network; comparing a latest measured amount and a previous measured amount at each measuring point to determine if an amount of change at an arbitrary point has exceeded a predetermined value; and calculating a position at which an amount of change becomes maximum, the position being calculated from the magnitudes of the amounts of changes in respective measured values at the time of the detection. The pipeline network may be a water supply and distribution pipeline network which includes a trunk pipeline and branch pipelines.
摘要:
An underground space structure of a buried radio device includes an underground space, a metallic cover on the underground space, and an emission surface having a ring area including a structure material with transmission of electrical waves surrounding the cover. An underground radio device includes an underground antenna arranged apart from the cover in the underground and a radio device connected to the antenna. A radio device on the ground includes an antenna on the ground and a radio device connected to the antenna. The underground antenna and the antenna on the ground are connected via the emission surface including the ring area.
摘要:
A database network system is capable of recognizing in a short time (within several minutes) the state of damage or the like of city lifelines (waterworks, electricity, and gas supplies) over a whole city. A database network system according to the present invention includes a center station, relay database stations (RDSs), and terminal stations. A terminal station group includes a plurality of terminal stations for acquiring changing information to accumulate the information as data and for transmitting the data as requested. Each of the plurality of relay database stations (RDSs) is arranged for the terminal station group, and accumulates pieces of information sequentially received from the terminals as specific data and other data and transmits the data as requested. The center station sequentially receives parts of the specific data and other data of an arbitrary one of the relay database stations (RDSs) from the corresponding relay database station, performs a receiving operation of all the data and the specific information data a plurality of times by performing the receiving operation a plurality of times, and accumulates the data as needed.
摘要:
A plate core material is manufactured by a method including the processes of soaking a core material (11) that is made of nickel or nickel-plated steel and includes copper as an impurity in an aqueous solution (12) containing ammonium ions and hydrogen peroxide, so that the copper is dissolved in the aqueous solution (12), and removing the aqueous solution (12) from the surface of the core material (11). Further, an alkaline storage battery is manufactured by a method including this manufacturing method. According to the manufacturing method of the present invention, an alkaline storage battery having higher reliability than that of a conventional alkaline storage battery can be obtained.
摘要:
A cellulose triacetate film having a film thickness from 115 to 135 &mgr;m and a Z value of 0.3 or less wherein the Z value is a slope (g/° C.) obtained by plotting tear strength against temperature in a range between −20° C. and +23° C., and a process for producing the same characterized by drying cast film using drying wind having a temperature T° C. which satisfies T0−15
摘要:
A plate core material is manufactured by a method including the processes of soaking a core material (11) that is made of nickel or nickel-plated steel and includes copper as an impurity in an aqueous solution (12) containing ammonium ions and hydrogen peroxide, so that the copper is dissolved in the aqueous solution (12), and removing the aqueous solution (12) from the surface of the core material (11). Further, an alkaline storage battery is manufactured by a method including this manufacturing method. According to the manufacturing method of the present invention, an alkaline storage battery having higher reliability than that of a conventional alkaline storage battery can be obtained.
摘要:
A whole surface driven speaker includes a diaphragm of an insulating plastic sheet carrying a conductor coil pattern. A foamed mica plate is bonded to the diaphragm. Two groups of permanent magnets are arranged on both sides of the diaphragm and oppose each other with pole faces of the same polarity across the diaphragm but with poles faces of opposite polarity adjoining each other on each side of the diaphragm.
摘要:
A washing apparatus that easily washes off metal impurities from a porous metal substrate used as an electrode plate core for an alkaline battery. The washing apparatus includes a liquid bath container which holds a solution for washing off the metal impurities. A guide guides movement of the porous metal substrate in the solution held in the liquid bath container. The porous metal substrate is wound into a hoop in a coil-shaped manner, and the guide guides the movement of a sheet portion of the porous metal substrate unwound from the hoop. A winding mechanism winds the sheet portion after being fed through the liquid bath container.
摘要:
An alkaline storage battery of the present invention includes a battery case and a group of electrodes. The battery case is provided with a resin case and a coating layer made of a resin formed on at least one surface selected from an inner surface and an outer surface of the resin case. The hydrogen permeability coefficient of the resin that is the material of the coating layer is 1×10−15 mol·m/m2·sec·Pa or less.
摘要:
An alkaline storage battery of the present invention includes a battery case and a group of electrodes. The battery case is provided with a resin case and a coating layer made of a resin formed on at least one surface selected from an inner surface and an outer surface of the resin case. The hydrogen permeability coefficient of the resin that is the material of the coating layer is 1×10−15 mol·m/m2·sec·Pa or less.
摘要翻译:本发明的碱性蓄电池包括电池壳和一组电极。 电池壳体设置有树脂壳体和由树脂壳体的内表面和外表面中的至少一个表面形成的树脂制成的涂层。 作为涂层材料的树脂的氢透过系数为1×10 -15 mol.m / m 2·sec·sec·Pa以下。