32results about How to "Endurance" patented technology

The invention provides a method for evaluating the erasing and writing performance of a Flash memory under thermoelectric stress. The steps are as follows: 1. Preliminary screening of the Flash memory, performing a full-chip erasing and writing test on device samples, and rejecting invalid devices; 2. Selective erasing and writing Test algorithm, select test temperature groups, and simulate different intensities of environmental stress; 3: Perform erasing and writing cycle tests, record the number of read data errors in each temperature group, all devices fail or the test stops when the preset test time is reached; 4: Screening test Data, calculate the average trouble-free working time θ of each temperature group; five: calculate the functional relationship between the ambient temperature and the temperature average trouble-free working time; six: find the average trouble-free working time at room temperature; seven: according to the erasing and writing cycle test , the time used for a single cycle and the number of erasing and writing times, and the number of times of erasing and writing at room temperature is calculated; Eight: Compared with the theoretical erasing and writing times of this type of device, evaluate whether the erasing and writing performance of this batch of devices meets the requirements; through the above steps, you can use The number of erasing and writing times evaluates the erasing and writing performance of the Flash memory, reduces the test time, provides sufficient reliability basis for the testing and evaluation of the Flash memory, and has practical application value.

The invention provides a wind speed measurement system applicable to extreme low pressure environments such as the Mars. The system comprises a heating bar, a casing, multiple groups of thermocouple hot ends, a common cold end and corresponding leads, a heating-used power supply, a pressure sensor, a data acquisition module and a wind speed calculation module. Under the low pressure, the heating bar is controlled to heat the casing through a constant heat flow mode, the acquisition module is used to measure the temperature differences of multiple thermocouples distributed uniformly on the surface of the sensor, and the current absolute pressure is combined to calculate the current wind speed and direction information. In comparison with the current wind speed sensor for industrial use, thehot film wind speed and direction measurement system under low pressure can directly work under the low pressure and has a synchronous wind speed and direction test ability, the structure is simple,and the reliability is high.

The invention discloses a method for restoring oil-contaminated soil by using wild ornamental plant iris lacteal. The method comprises the following steps of (1) planting the iris lacteal into petroleum hydrocarbon contaminated soil the mass concentration of which is 1%-4% by adopting ramet seeding, and watering in time to keep the soil water-holding capacity at 60% of water-holding capacity; (2) taking away the plant from the contaminated soil and planting the iris lacteal again when the plant achieves a mature period, or taking away an overground part of the plant to make sure the root of the plant to become a new plant, and repeating the planting process until the petroleum hydrocarbon content in the soil achieves a nation environmental standard or ecological safety index. The method disclosed by the invention has the advantages that the iris lacteal has certain tolerance and good restoring capacity on the low concentration and high concentration petroleum hydrocarbon contaminated soil, the operation is simple, the cost is low, the secondary pollution is not generated, the iris lacteal does not enter a food chain, a soil structure is improved, and the environment is beautified, so that the method is suitable for the restoring operation of large-area petroleum hydrocarbon contaminated soil.

Disclosed is a hollow fiber that includes a hollow positioned at the center of the hollow fiber, macropores positioned at adjacent to the hollow, and mesopores and picopores positioned at adjacent to macropores, and the picopores are three dimensionally connected to each other to form a three dimensional network structure. The hollow fiber includes a polymer derived from polyimide, and the polyimide includes a repeating unit obtained from aromatic diamine including at least one ortho -positioned functional group with respect to an amine group and dianhydride.

This copper alloy hot-forged part has an alloy composition which contains 0.21 to 0.44 mass% of Co, 0.06 to 0.13 mass% of P, 0.003 to 0.08 mass% of Sn and 0.00003 to 0.0030 mass% of O, with the balance consisting of Cu and unavoidable impurities, and in which the Co content, [Co] mass%, and the P content, [P] mass%, satisfy the relationship: 3.1 = ([Co] - 0.005) / ([P] - 0.006) = 4.9. In the cross-sectional metal structure, the sum of the fraction of recrystallized-grain groups where the recrystallized grains have an average grain diameter of 0.050 to 0.50mm and the fraction of un-recrystallized grains is 80% or above.