Abstract: A battery cell includes an electrode assembly. A shape of a radial cross section of the electrode assembly is an ellipse. A length of a major axis noted as L1 and a length of a minor axis noted as L2 of the electrode assembly satisfy a relational expression: 0.3 mm?L1?L2?0.5 mm.

Abstract: This application provides a router. A shielding portion is formed by extending outward an end of a housing where a rotary shaft seat is disposed. The rotary shaft seat is disposed on a side of the shielding portion facing a back of the housing. An end of the shielding portion away from the housing extends to at least a side of the rotary shaft seat away from the housing, so as to shield a front of the rotary shaft seat. In this way, the rotary shaft seat is invisible in a conventional viewing angle, that is, a viewing angle from a front of the router.

Abstract: Provided is a method for producing at least one type of thermoplastic resin selected from polycarbonate, polyester and polyester carbonate. The method includes a step of subjecting a dihydroxy compound and diaryl carbonate and/or dicarboxylic acid ester to melt polycondensation in the presence of a transesterification catalyst selected from a compound represented by formula (1) and/or formula (2). In formula (1), R1 to R24 are each a hydrogen atom, an alkyl group having 1-10 carbon atoms or a cycloalkyl group. Some of the carbon atoms may be substituted by heteroatoms. Among R1 to R24, alkyl groups or the like substituted on the same N atom may bond to each other to form a ring. The values of a to d are each 0 or 1. X? is a monovalent anion. In formula (2), Ar1 to Ar12 are each a substituted or unsubstituted aryl group. M? is a monovalent anion.

Abstract: A battery cell includes an electrode assembly. A shape of a radial cross section of the electrode assembly is an ellipse. A length of a major axis noted as L1 and a length of a minor axis noted as L2 of the electrode assembly satisfy a relational expression: 0.3 mm?L1?L2?0.5 mm.

Abstract: A manufacturing method of a high-reliability optical fiber coupler includes (1) manufacturing the optical fiber coupler by a fused biconical tapering process employing a parallel sintering process, and detecting via a tension test the strength of the optical fiber resulting from the sintering process, securing the strength thereof being greater than or equal to 1N; (2) fixing both ends of the sintered optical fiber coupler in a U-shaped quartz groove via hardening adhesive, and filling inside of the U-shaped quartz groove around the coupling arm at both ends thereof with adhesive to shorten the suspending length of the optical fiber; (3) inserting the U-shaped groove containing the optical fiber coupler into a circular quartz tube, and fixing both ends of the circular quartz tube via hardening adhesive; and (4) sleeving a stainless steel tube around the circular quartz tube, and sealing both ends of the stainless steel tube.

Abstract: This specification discloses a unique Web search engine to help people find information on the Web more easily and efficiently, and a page-sized query algorithm which is applicable to Web search engines and other systems using large-scale databases. The Web search engine utilizes a simple hierarchical structure under the category Web, multiple ranks of records, diversified views of search results, display of unlimited records that are matched with keywords in the database, and opening any page of search results randomly. The page-sized query is different from the conventional queries in which the records are displayed on pages by skipping from the beginning of the record set (except page 1). In the page-sized queries, the records are directly displayed from the beginning of the record set on all pages, and the query size is restricted to a proper number that is equal to or a little larger than the record number for one page.

Abstract: This specification discloses a method and system to utilize Web resources for learning language words and phrases that are found in either general language study or specific language tests, such as SAT, GRE, TOEFL and GMAT, etc. The vocabulary and Web resource information are indexed and stored into a vocabulary database. From a user interface, learners view the vocabulary and open a Web page on which the current word or phrase is used. The vocabulary is automatically found and highlighted in the text of Web pages to attract learners' attention. The data in the database are routinely audited to check whether or not the index of vocabulary and Web resource information is valid. The major advantage of the present invention is to fully utilize a large number of free and easily accessible stories, fictions, essays and notes on the Web for language vocabulary learning.