摘要:
Ferroelectric rare-earth manganese-titanium oxides and methods of their manufacture. The ferroelectric materials can provide nonvolatile data storage in rapid access memory devices.
摘要:
NMR data are acquired using a phase-alternation of the tipping pulse. Averaged properties are estimated over a window length. The averaged properties are inverted to undo the effects of the averaging. A matrix defined in terms of Walsh functions is used in the inversion.
摘要:
Language learning systems and methods may be provided. An interactive lesson module may be provided. The interactive lesson module may be configured to provide an interactive language lesson that prompts a user to repeat, translate, or define words or phrases, or to provide words corresponding to images, at a controllable difficulty level. An interactive social simulation module may be provided. The interactive social simulation module may be configured to provide an interactive environment that requires the user to use the language to communicate with a virtual character to achieve a goal at a controllable difficulty level. A learner model module may be provided. The learner model may be configured to control the difficulty level of the interactive language lesson and the interactive social simulation based on a lesson progress report and a simulation progress report.
摘要:
An electrical connector includes an insulative housing (1), a plurality of terminals (2) retained in the insulative housing, a shell (3) and a pair of strengthened members (4). The insulative housing comprises a base portion (10) and a terminal supporting portion (12) extending forwardly from the base portion. Each terminal has a contact portion (20) extending along the terminal supporting portion. The shell is attached to the insulative housing and has a mating frame (31) surrounding the contact portions and the terminal supporting portion to define a mating cavity therebetween. Strengthened members are buried at opposite ends of the terminal supporting portion.
摘要:
Novel green phosphors are disclosed having the comprise silicate-based compounds having the formula (Sr,A1)x(Si,A2)(O,A3)2+x:Eu2+, where A1 is at least one divalent cation (a 2+ ion) including Mg, Ca, Ba, or Zn, or a combination of 1+ and 3+ cations; A2 is a 3+, 4+, or 5+ cation, including at least one of B, Al, Ga, C, Ge, N, and P; A3 is a 1−, 2−, or 3− anion, including F, Cl, Br, and S; and x is any value between 1.5 and 2.5, both inclusive. The formula is written to indicate that the A1 cation replaces Sr; the A2 cation replaces Si, and the A3 anion replaces O. These green phosphors are configured to emit visible light having a peak emission wavelength greater than about 480 nm. They have applications in green illumination systems, red-green-blue backlighting systems, white LEDs, and plasma display panels (PDPs).
摘要翻译:公开了新的绿色荧光体,其具有包含具有式(Sr,A 1 H 2)x Si(Si,Al 2)的硅酸盐基化合物 O,A 3 + 2 + x 2:Eu 2+,其中A 1至少是一个二价阳离子 (2+离子),包括Mg,Ca,Ba或Zn,或1+和3+阳离子的组合; A 2是3+,4+或5+阳离子,包括B,Al,Ga,C,Ge,N和P中的至少一种; A 3是1-,2-或3-阴离子,包括F,Cl,Br和S; x是1.5到2.5之间的任何值,包括两者之间的值。 该公式被写为表示A 1阳离子取代Sr; A 2阳离子取代Si,并且A 3 N阴离子取代O.这些绿色磷光体被配置为发射具有大于约480nm的峰值发射波长的可见光。 它们在绿色照明系统,红绿蓝色背光系统,白色LED和等离子显示面板(PDP)中都有应用。
摘要:
An electrical connector (100) includes an insulative housing (10), a movable contact (23) and a fixed contact (22). The insulative housing defines a receiving hole (12) for receiving a mating plug (4) therein. The movable contact comprises a base portion (230) received in the insulative housing. A flexible portion (231) and a connecting portion (232) both extend from the base portion. The fixed contact comprises a base portion (221) received in the insulative housing. Two separated contacting portions (222) and a soldering portion (223) both extend from the base portion. The contacting portions of the fixed contact disconnect the flexible portion of the movable contact only when the mating plug is completely inserted into the receiving hole of the insulative housing.
摘要:
An optical-electric connector (1) includes an insulating housing (20), a number of terminals (30), an optical-electric converter (50) and a shielding shell (10). The insulating housing (20) defines a mating face (230) having a mating hole (231) thereon, a receiving room (25) communicating with the mating hole and a number of terminal slots (27) receiving the terminals. The optical-electric converter is assembled in the insulating housing. The shielding shell substantially encloses the insulating housing and comprises a grounding tab (12) extending from an upper face thereof.
摘要:
An electrical connector (1) has an insulative housing (10), a plurality of contacts (20) received in the housing, an inner shell (30) surrounding the housing and an outer shell (40) surrounding the inner shell. The connector has a plurality of tabs (251, 263) extending inwardly therefrom. The tabs are constructed in the cover and bottom of the inner shell and can be latched to a mating connector. The out shell is conjoint to and overlaps the inner shell.
摘要:
An electrical connector (1) includes an insulative housing (10), a plurality of terminals (20) received in the housing, and a shell (30) surrounding the housing. The insulative housing includes a base portion (11) defining a plurality of passageways (111) extending therethrough, and a tongue portion (12) extending forwardly from the base portion. One of the passageways extends from the base portion into the tongue portion. One of the terminals is located adjacent to and outside of the tongue portion.
摘要:
A power connector includes a housing (10) defining a tube-like receiving chamber (16) extending through a front face (11) thereof and a receiving hole extending through a rear face (12) thereof, a first contact (20) extending into the receiving chamber, and a second contact (50) extending into the receiving hole. The receiving hole comprises a front section (17) and a rear section (18). The front section is communicating with the receiving chamber and is larger than the rear section in diameter thereof to form a step portion therebetween. The second contact (50) is a single piece and comprises an engaging portion (51) extending in the receiving chamber, a retaining portion (52) extending from the engaging portion and engaging with the step portion for preventing the second contact from moving rearwardly, and a connecting portion (53) extending from the retaining portion and comprising a bent portion engaging with the rear face of the housing for preventing the second contact from moving forwards.