251 results about "Static mode" patented technology

The problem of charge leakage in the AC compensation filter for the error amplifier of a pulse width modulation (PWM)-based DC—DC converter is effectively obviated by controllably sampling and storing the voltage across the AC compensation filter, in response to a transition of the operation of a DC power supply from run or active mode to quiescent or sleep mode. The sampled voltage is retained as a compensation voltage throughout the quiescent mode, so that it will be immediately available to the PWM circuitry at the termination of the quiescent interval. This serves to ensure a relatively smooth (low noise) power supply switch-over during a subsequent transition from quiescent to active mode.

An envelope tracking power amplifier system time-aligns a supply voltage to an input signal to a power amplifier. The power supply operates in a static mode for low amplitude input signals and operates in a dynamic mode for high amplitude input signals. In the static mode, the power supply produces a substantially constant supply voltage independent of the amplitude of the input signal. In the dynamic mode the power supply produces a dynamically varying envelope tracking supply voltage based on the amplitude of the input signal. A first delay is determined based on portions of the input and output signals captured during static operation of the power supply and a second delay is determined based on portions of the input and output signals captured during dynamic operation. A delay mismatch is estimated based on a difference between the first and second delays.

The embodiment of the invention discloses a method, equipment and a system for sharing a frequency spectrum resource, which relate to the field of wireless communication and are used for realizing the sharing of a dynamic frequency spectrum resource among different mobile honeycomb networks on the basis of ensuring the network coverage and the service continuity. The method comprises the following steps: dividing the frequency spectrum resource into a basic frequency band and a dynamic frequency band, wherein the basic frequency band is used for ensuring the network coverage and the service continuity of at least two networks of the sharing frequency spectrum resource; fixedly distributing the basic frequency band in the frequency spectrum resource to at least two networks in a static mode, and distributing the dynamic frequency band in the frequency spectrum resource to at least two networks in a dynamic mode; and transmitting the frequency spectrum resource distribution information of the basic frequency band and the frequency spectrum resource distribution information of the dynamic frequency band to a base station so as to be used for the frequency spectrum resource allocation of the base station. The invention is suitable for mobile honeycomb networks, such as GSM, UMTS, LTE, CDMA2000, WiMAX and the like.

The invention discloses a silicon on insulator (SOI) wafer double-mask etching-based vertical comb teeth driven torsional micro-mirror and a manufacturing method thereof, which belong to the fields of micro-electro-mechanical systems and micromachining. The torsional micro-mirror is driven by single side comb teeth and is provided with three layers of moveable parts and fixed parts with the same structure. The torsional micro-mirror can work in a static mode or in a dynamic mode by applying voltage signals to different comb teeth. The method for manufacturing the vertical comb teeth driven torsional micro-mirror is characterized in that: single SOI wafer processing technology is adopted without multi-layer thin film sedimentation or bonding technology; the whole technological process only needs two mask plates; the upper and lower vertical comb teeth are etched by one mask without an alignment error problem of the comb teeth; and the technological process does not need hydrogen fluoride (HF) corrosion so as to effectively avoid adhesion among the comb teeth caused by a liquid environment. The manufacturing method has the advantages of high precision, low cost, small stress, high finished product rate, simple process, high repeatability, easy batch production and the like.

In a wireless communication system having sometimes mobile subscriber units and a plurality of fixed network devices located at cell sites, a multimode acquisition protocol is provided at each subscriber unit which first senses whether the subscriber unit is static or mobile from the nature and quality of the communication links with nearby network devices and then enables an acquisition protocol suited to either static mode or mobile mode. In a specific embodiment, the protocol initiates procedures to change acquisition mode from static to mobile upon failure of the subscriber unit to sense three consecutive scheduled polling packets sent by a linked network device or upon loss of communication with any locally-known network device or upon failure to transmit 25 consecutive data packets. In such case, the procedure is initiated to determine whether it is appropriate to switch to a mobile mode for purposes of acquisition.

A pair of multi-frequency ultrasound transducer surround a fluid flow and are configured to operate under computer control in both a mono-static and a bi-static mode at each of the multiple frequencies. In the mono-static mode, pulsed wideband Doppler shift measurements provide the velocity profile across the fluid flow which can be combined with measured pressure drops to determine the rheogram—a plot of shear stress versus shear rate. Velocity profile data from each frequency can be combined to form a composite velocity profile. In the bi-static mode, transmission data is collected that improves the accuracy and robustness of the velocity profile and provides supplemental material property information. The system is configured for automated operation for a wide variety of fluid types and can be reconfigured and/or monitored remotely.

The invention relates to a biaxial stretching/compression mode scanning electron microscope mechanical test device belonging to an electromechanical material performance test instrument. The biaxial stretching/compression mode scanning electron microscope mechanical test device comprises a biaxial loading and transmission unit composed of a high-precision direct current servo motor, a three-level large-reduction-ratio reducing mechanism, a small-lead ball screw nut pair and a guide rail. With the adoption of the biaxial stretching/compression mode scanning electron microscope mechanical test device, precise application of load can be realized in a quasi-static mode at an extremely low velocity, a plurality of types of material performance test modes containing a uniaxial stretching/compression mode, a biaxial constant speed/variable speed synchronous stretching/compression mode, or a biaxial constant speed/variable speed asynchronous stretching/compression mode, and the like can be started by synchronization precision acquisition of four paths of load/displacement signals and combining a closed-loop control strategy taking a load, displacement or deformation signal as a feedback source, and drive units, transmission units and detection units of each shaft are independent and are not interfered with one another. The biaxial stretching/compression mode scanning electron microscope mechanical test device has a compact and exquisite structure and good compatibility with imaging instruments, such as a scanning electron microscope.

The invention discloses a mixed structured query language (SQL) injection protection method, which combines a static mode matching technology and a dynamic characteristic filtering technology. The method comprises the following steps of: automatically learning all legal SQL sentences of a service system in security environment, and constructing a knowledge base; and matching the SQL sentences with the knowledge base by using a mode matching algorithm in real-time working environment, and if matching succeeds, determining that the SQL sentences are legal. The SQL sentences which are unsuccessfully matched are not immediately determined to be illegal, deep characteristic check is performed by using a characteristic filtering algorithm based on a value-at-risk, and the truly illegal SQL sentences are identified. A mode matching method and a characteristic filtering method are matched and combined with each other, so a good effect is achieved, and a conflict between accuracy rate and mis-alarm rate caused by the conventional injection protection method can be well solved.

The invention provides a dynamic networking method and equipment for network access points. According to the embodiment of the invention, the traditional network-centered idea is changed into the user-centered idea and services are provided for users, thereby preventing the user from sensing the network environment frequently and providing a data transmission service of the user in a low-speed or static mode by an APG. Moreover, during the movement process of the user, the user service transmission can be realized based on dynamic APG updating and AP cooperation in the APG. Therefore, the number of times for user switching can be reduced and user switching in the APG does not need to use the core network, thereby reducing the signaling load of the core network.

The invention discloses an FPGA (Field Programmable Gate Array)-based single event effect test method for a NAND FLASH device and belongs to the field of space radiation effect and reinforcement. The method comprises an upper computer, a 50MHz crystal oscillator, a program configuration port JTAG (Joint Test Action Group), an FPGA control module and an NANF FLASH test module. The test method comprises the following four working modes: 1) static mode; 2) dynamic mode; 3) dynamic reading/ writing mode; and 4) dynamic reading/ erasing/ writing mode. With the method, single event effect test of the large-volume NAND FLASH memory can be realized. Under the condition of an experimental analog source, single event effect characteristic parameters can be efficiently obtained.

Detection of intravascular plaque in OCT images is carried out by obtaining images of vascular tissue from a vascular component by OCT either in a static mode of a single image or in a dynamic mode where the images are obtained by scanning. The method acts by dividing the OCT image into different regular regions, calculating different texture features for each of the above regions with a reduced set of less than a full set of the 26 Haralick textural features, using a clustering algorithm to segment the image defined by its texture features calculated above into different regions and transforming the segmented image back from its representation using texture features to its space-domain representation. The method uses three or four texture features where the reduced sets can be f1, f 2, and f14 (ASM at 0°, Inertia at 0° and ASM at 90°).

The invention provides a multi-degree-of-freedom loading method based on parallel mechanism driving force closed loop. The multi-degree-of-freedom loading method comprises the following steps: converting force and moment, which are required to be applied to a tested element, into driving force for loading each actuator of a six-degree-of-freedom parallel mechanism; and then carrying out force closed loop control on each actuator of the parallel mechanism so as to achieve the control on the multi-degree-of-freedom load of the tested element. The loading method also can comprise the steps of carrying out force positive solution operation on the driving force of the parallel mechanism, and resolving the force and moment which are applied to the tested element, thereby achieving accurate multi-degree-of-freedom force loading on the complex stressed tested element by the six-degree-of-freedom parallel mechanism. Thus, under the condition of not using a six-degree-of-freedom sensor, the force and moment on the tested element can be measured; the complicated multi-degree-of-freedom stress and moment of the tested element can be loaded in a static mode or in a dynamic mode; moreover, the loading force and moment, which are applied to the tested element, can be calculated accurately.

Multicarrier modulated communications, involving a transmitting modem (30; 30′) and a receiving modem (40; 40′) that operate according to normal operating mode and a low-power, quiescent, mode, are disclosed. In the quiescent mode, transmitter power is saved by scaling down the amplitude of the transmitted symbols in each frame by a scaling factor (A), and transmitting multiple instances of the frames in sequence. On receipt, the repeated frames are summed, and the summed amplitudes scaled to account for the repetition factor (M) and the scaling factor (A), to recover the transmitted information. If the repetition factor (M) is greater than or equal to the square of the scaling factor (A), the signal-to-noise ratio in quiescent mode is at least as high as that in normal operation. The repeating, scaling, and summing may all be performed in the frequency domain or in the time domain, as desired.

The invention provides a network resource scheduling method and system based on user experience. The method comprises the following steps: according to user request resources and user grades, obtaining user initial scheduling data, and according to the user initial scheduling data, distributing network resources to users in a static mode; monitoring the QoE data of the users; according to the user request resources, the user grades and the current QoE data of the users, obtaining dynamic priorities of the users; and according to the dynamic priorities, dynamically distributing the network resources to the users. Compared to the prior art, the influences of the users on network resource scheduling are taken into full consideration, the network resources are scheduled on the basis of QoE of the users, and the QoE of the users is regulated by use of dynamic change of the resources after scheduling, such that the demands of the users for the network resources are fully reflected, the dissatisfaction of the users is minimized, and the utilization rate of the resources is maximized.

The invention discloses a charging method of a low-voltage storage battery under the static mode of electric vehicles. In static condition of the vehicles, a battery management system wakes and detects low-voltage storage battery voltage automatically, and carrying capacity of the low-voltage storage battery is calculated through the low-voltage storage battery voltage; if the charging capacity calculated is lower than a set value, the battery management system controls a direct-current to direct-current converter, and the low-voltage storage battery is charged through a power battery pack; if the charging capacity calculated is higher than an internal set value of the battery management system or is not satisfied under other charging conditions or charging is completed or abnormity occurs, the battery management system controls the direct-current to direct-current converter and the battery management system to enter hibernation. In the static condition of the vehicles, the low-voltage storage battery is charged by the aid of the low-voltage storage battery system, vehicle cost is lowered, static time of the vehicles is prolonged, usage experience of the electric vehicles is improved, and good economic and social benefits are achieved.

The invention relates to a method for treating tetracycline waste water with an iron-modified attapulgite adsorbent, which is characterized in that concentration of tetracycline in the waste water is 5-150mg/L. The iron-modified attapulgite adsorbent is added in the tetracycline waste water, and mass ratio of the tetracycline waste water to the adsorbent is 1: (4-6). The adsorption process adopts a static mode of action and/or an oscillating and stirring mode of action at the temperature of 0-50 DEG C. The method aims at the waste water polluted by tetracycline and removes tetracycline by adding the iron-modified attapulgite adsorbent in the waste water for adsorption. The method has the advantages of having high adsorption efficiency for tetracycline compounds, simple operational process, low requirements for adsorption conditions, low cost of adsorption materials and high regeneration efficiency and being easy to popularize. The method is used for removing tetracycline compounds in a water body and has good economic and environmental benefits.