76results about How to "Difficult to achieve" patented technology

An optical storage system suitable for optical storage and retrieval of information using a storage medium comprising a substrate, an active layer for retention of the data, and an overlying optical layer, or layers for double-sided. The optical layer serves to produce an evanescent field in or adjacent to the active layer in response to an incident beam of radiation. The evanescent field is frustrated or attenuated by the data in the active layer and produces a signal.

An apparatus for carrying out algae intensive-cultivation while conducting an environmental control most suitable for growth of algae in an artificial environment including dissolved gas, light, temperature, nutrient source and sanitary atmosphere; and a method of intensive cultivation therewith. There is provided an apparatus comprising water tank (1) for cultivating unialgae as seedling; gas dissolution diffusion units (3-a, 3-b) for achieving dissolution of a gas in a culture water of the water tank; light irradiation units (10, 11) for irradiating the water tank with light whose wavelength and illuminance are controlled; temperature control unit (20) for controlling the temperature of the culture water of the water tank so as to fall within a given range; nutrient salts adding unit (17) for adding to the water tank a nutrient liquid containing an essential nutrient source vital to the growth of algae; purification unit (12) for carrying out bacterial eradication and filtration of the culture water of the water tank; and meters for control of the above units.

The invention provides a grid-connected photovoltaic power generating system based on a novel direct current converter and a working method of the grid-connected photovoltaic power generating system. The grid-connected photovoltaic power generating system is characterized in that the grid-connected photovoltaic generating power system consists of a direct current converter, a grid-connected inverter, an isolation transformer and a control circuit; the working method comprises the steps as follows: 1. collecting signal; 2. MPPT module data processing; 3 applying an MPPT arithmetic; 4 inverter module data processing; 5. applying a grid-connected arithmetic; and 6. applying SPWM arithmetic. The grid-connected photovoltaic power generating system and the working method thereof have the advantages of small technical realization difficulty, obviously reducing the cost, flexible installation, convenient maintenance, high voltage and current detection precision, advanced control arithmetic, quick running speed of control chip, the system being capable of obtaining excellent tracking precision and stability, combining the hardware device with the software programming of a digital signal processor, simple design, low cost and easy realization of the hardware device, brief and understandable software programming arithmetic.

An all solid state battery having high output performance and a manufacturing method thereof are provided. The all solid state battery of the present invention comprises a negative electrode layer, a positive electrode layer, and a solid electrolyte layer having a lithium ion conductivity. At least one layer of the solid electrolyte, the positive electrode layer, and the negative electrode layer includes a lithium ion conductive crystal and A_xB_yO_z (A is one or more selected from the group consisting of Al, Ti, Li, Ge, and Si. B is one or more selected from the group consisting of P, N, and C, wherein 1≦X≦4, 1≦Y≦5, and 1≦Z≦7). The solid electrolyte material to which a preferable sintering additive is added in a predetermined ratio is densified by firing at relatively low temperature in the manufacturing process. The ion conductivity thereof is also high.

The invention discloses a gesture-wakened electronic device and a gesture wakening method thereof. The gesture-wakened electronic device comprises a sound generator, a sound receiver, a filter, a gyroscope, an accelerator and a controller. The sound generator transmits sound wave; the sound receiver receives an acoustic positioning detection signal reflected by a moving object; the signal is filtered by the filter to remove background noise. The controller judges current motion state according to the gyroscope and the accelerator. The controller calculates changes in displacement of the moving object according to time of sound wave propagating in the air when in the current motion state of the electronic device; the controller recognizes a motion pattern of the moving object according to the changes in the displacement; if the motion pattern matches with an appointed device wakening pattern in a motion pattern mapping command base, the electronic device is wakened to run. The gesture-wakened electronic device and the gesture wakening method thereof have the advantages that control convenience level is increased, user experience is improved, the gesture recognition technology is combined with the gyroscope and the accelerator, frequent waking of the device caused by maloperation or misjudgment is avoided, and standby power consumption is optimally balanced.

A wavelength tunable laser device includes: a laser cavity formed of a grating and a reflecting mirror including a ring resonator filter; a gain portion; and a phase adjusting portion. The grating creates a first comb-shaped reflection spectrum. The ring resonator filter includes a ring-shaped waveguide and two arms and creates a second comb-shaped reflection spectrum having peaks of a narrower full width than peaks in the first comb-shaped reflection spectrum at a wavelength interval different from that of the first comb-shaped reflection spectrum. One of the peaks in the first comb-shaped reflection spectrum and one of the peaks in the second comb-shaped reflection spectrum are overlapped on a wavelength axis, and a spacing between cavity modes is narrower than the full width at half maximum of the peaks in the first comb-shaped reflection spectrum.

A water-absorbing resin has a polymer molecular chain in which 50 mol % or more of repeating units in the chain are carboxy group-containing units, wherein the carboxy group neutralization ratio in the central part of the resin is 60 mol % or more and the carboxy group neutralization ratio on the external surface of the resin is 50 mol % or less. A method for producing the water-absorbing resin comprises polymerizing a monomer solution to form a polymer, drying the resulting polymer, and heat-treating the dried polymer, wherein the monomer solution contains a mixture comprising an alkali metal salt of an unsaturated carboxylic acid and an ammonium salt thereof, the percentage of the ammonium salt being more than 50 mol % of the mixture, and further contains a condensation crosslinking agent.

The present invention relates to stabilised <99m>Tc radiopharmaceutical compositions, which include both a radioprotectant and one or more antimicrobial preservative(s), and hence have an extended lifetime of use. The radioprotectant is ascorbic acid, para-aminobenzoic acid, gentisic acid or a salt thereof with a biocompatible cation, and the antimicrobial preservative is one or more compound from the paraben series of preservatives. The invention is particularly useful for cationic, lipophilic <99m>Tc heart imaging agents such as Myoview(TM).

A farming device for benthic organisms, which is submerged in a water tank or a body of water, is constituted of a plurality of tray-form containers, which are the cultivating floor for benthic organisms such as bivalves, and are stacked in the vertical direction, with a central cavity passing through the stacked cultivating floors in the vertical direction and horizontal gaps defined between the cultivating floors, the cultivating floors communicating with the cavity.

In one embodiment, a personal-care composition in the form of a water-in-oil emulsion comprises at least about 10% of a non-polar silicone oil; from about 0.1% to about 10% of a first oil-soluble solid sunscreen; and from about 0.1% to about 10% of a second oil-soluble solid sunscreen. The weight ratio of the first sunscreen to the second sunscreen may be from about 0.8 to about 2.0, or from about 1.0 to about 1.5. The first sunscreen may be oxybenzone. The second sunscreen may be avobenzone. The composition may further comprise a skin-care active selected from the group consisting of a vitamin B₃ compound, a sugar amine, a peptide, a hexamidine compound, and combinations thereof. In another embodiment, the invention relates to a method for improving the solubility of a second oil-soluble solid sunscreen in the oil phase of a water-in oil emulsion.

An improved rotating anode x-ray tube housing is disclosed. In the preferred embodiment: a single cable, insulated with Ethylene-Propylene Rubber (“EPR”), has an extended Federal Standard terminal or plug mounted within an extended Federal Standard receptacle, attached to an anode end of the housing; the cable is designed to carry up to approximately 150 kV to power the cathode; and insulation of the plug also insulates the 150 kV from a grounded center portion of the x-ray tube and the anode disk area. The longitudinal axes of the anode and high-voltage plug are parallel to one another. This new configuration allows the cathode plug and receptacle to be moved virtually entirely inside the housing. This results in absolute minimal size of the assembly, and a single cable that exits parallel to the rotational axis of the housing.

The invention relates to an asynchronous time warping calculation method for virtual reality. The asynchronous time warping calculation method for virtual reality is characterized by starting an independent CPU thread at a virtual reality synthesizing end; and according to the time of generation of a vertical synchronizing signal every time, generating a video card work task in advance, wherein the video card work task distributes time warping and the time warping operation and the content rendering operation are operated asynchronously to guarantee that the rendering content through time warping calculation can be displayed in a head wearable device in real time. The asynchronous time warping calculation method for virtual reality has the advantages that the designed asynchronous time warping calculation method can effectively solve the problem that too long time delay for display can cause motion sickness and the like, so as to provide good virtual reality immersion feeling for a user.

The invention belongs to the technical field of mobile communication and provides a channel estimation method based on a time-domain sliding window. The method includes the following steps: according to reference signal sign frequency domain estimation values in the time-domain sliding window, calculating time-domain estimation coefficients corresponding to subcarriers on OFDM symbol positions; according to the reference signal symbol frequency domain estimation values and the time-domain estimation coefficients, performing time-domain channel estimation on OFDM symbols without reference signals and outputting a channel estimation value; and updating the reference signal symbol frequency domain estimation values in the sliding window. The invention also provides a channel estimation device based on the time-domain sliding window. The device is capable of obtaining a higher channel estimation precision compared with a linear interpolation estimation technology based on two reference signals; the time-domain sliding window is adopted and in terms of time, channel information in the history or at a present moment is mainly used and a repeated or mixed output mode is adopted so that the estimation performance is improved and at the same time, larger processing waiting or realization difficulties are not brought; and the real-time update of the sliding window ensures self-adaption to a time-varying channel in an estimation process.

Provided is an alkali-free glass substrate having a high strain point and excellent bubble count, and a method for manufacturing the alkali-free glass substrate. The method includes: a batch preparing process of preparing a raw material batch so as to obtain alkali-free glass containing, in mass %, 50 to 80% of SiO₂, 15 to 30% of Al₂O₃, 0 to 4.5% of B₂O₃, 0 to 10% of MgO, 0 to 15% of CaO, 0 to 10% of SrO, 0 to 15% of BaO, 0 to 5% of ZnO, 0 to 5% of ZrO₂, 0 to 5% of TiO₂, 0 to 15% of P₂O₅ and 0 to 0.5% of SnO₂ as a glass composition; a melting process of melting the prepared raw material batch; a fining process of fining the molten glass; and a forming process of forming the fined glass into a sheet shape. The raw material batch is melted such that a bubble enlarging temperature of the obtained glass is lower than a maximum temperature of the fining process.

To provide a sintered silicon nitride with conductivity and densification, an oxide of titanium group elements, such as titanium oxide, hafnium oxide, zirconium oxide and the like, aluminum oxide and/or aluminum nitride is added as needed to silicon nitride-oxidant of rare-earth elements-aluminum oxide system or silicon nitride-oxide of rare-earth elements-magnesia system, and then specified quantity of carbon nonotube (CNT) is added to the above mixture. CNT generates silicon carbide after the reaction with contiguous or proximal silicon nitride and the like depending on the sintering duration at high temperature. Since silicon carbide is generated along with nanotubes, the silicon carbide functions as conductor with excellent heat resistance, corrosion resistance and the like.

The invention relates to a tea tree cultivation method suitable for mechanized management. The tea tree cultivation method suitable for mechanized management comprises arrangement of protecting tea rows, tea tree planting rows, preparation rest areas and working channels. The tea tree cultivation method is characterized in that the protecting tea rows (2) are respectively arranged on the periphery within a planting field (1), the tea tree planting standards of the protecting tea rows (2) conform to the requirements of the tea tree planting rows (3); longitudinal working channels (6) are arranged between the tea tree planting rows (3); the longitudinal working channels (6) arranged between the tea tree planting rows (3) are communicated with horizontal working channels (5), and two preparation rest areas (4) communicated with the longitudinal working channels (6) and the horizontal working channels (5) are arranged in an opposite angle area of the planting field (1). Whole-course mechanized management of a tea garden can be achieved, and pressure of labor shortage is relieved.

The invention relates to a computer unified device architecture (CUDA)-based multi-system signal frequency rapid acquisition implementation method. The method is characterized by being based on a high-performance private computer (PC), using the CUDA, and realizing rapid acquisition of the multi-system signal frequency through a parallel way. The method comprises the implementation steps of setting Doppler and Doppler changing rate segments; determining the number of blocks of each graphics processing unit (GPU) kernel function and the number of threads of each block; reading signal data into a GPU card overall storage space; starting a down-conversion and integrator module; performing parallel fast Fourier transform (FFT) operation; searching the maximum spectral line and corresponding Doppler changing rate segments and Doppler segments through a parallel reduction manner; and computing estimated values of carrier frequency offset and the Doppler changing rate to complete acquisition. The signal frequency rapid acquisition algorithm is in accordance with the CUDA and working characteristics of the GPU, so that the method can take full advantage of the parallel computing power of the GPU, is suitable for multiple systems of signals, effectively improves the acquisition speed and is easy to realize.

The embodiment of the invention provides a server overload control method. The method comprises the following steps: a client calculates and stores time data of each historical transaction; The clientend calculates a timeout reference time length of the current transaction according to time data of each of the historical transactions in a preset period; The client end calculates the transaction timeout length of the current transaction according to the timeout reference length of the current transaction; The client controls the state of the current transaction according to the transaction timeout length of the current transaction. The invention also provides a server. The server and the overload control method thereof provided by the invention can solve the problem of overload of the server.

The invention belongs to the technical field of power system equipment state detection and in particular to a system and method for detecting distribution network pole-mounted equipment fault discharge. The system comprises an acquisition module used for collecting the power-frequency periodic signal, the UHF signal and the ultraviolet photon signal of the distribution network pole-mounted equipment; a multichannel AD continuous conversion module used for converting an analog signal output by the acquisition module into a digital signal; a MCU module used for obtaining the digital signal output by the multichannel AD continuous conversion module, and extracting the amplitude and the time of the UHF signal, its phase relation with the power-frequency periodic signal and the number of ultraviolet photons; and a control terminal connected with the MCU module through a communication module and used for drawing a PRPD map, displaying the number of ultraviolet photons, identifying a fault discharge type, and displaying a result. The system realizes the noncontact detection of the distribution network pole-mounted equipment by a UHF method and an ultraviolet detection method, and identifies the internal discharge and the external discharge according to the technical characteristics of the UHF method and the ultraviolet detection method.