43results about How to "Strong regulation" patented technology

The invention provides a preparation method of ZnO (zinc oxide) nanometer-micrometer rod with a parallelogram cross section. The method comprises the following steps of: using a monocrystalline silicon piece with the surface covered by a Au film with the thickness of 10nm as a deposition substrate; uniformly mixing a certain amount of Zn power or ZnO powder, Sb2O3 powder and carbon powder at a certain mole ratio, putting the mixture used as a reaction source into a quartz boat, and reversely buckling the substrate deposited with the Au film on the raw materials; then putting the quartz boat at a position, close to a thermoelectric couple, on the center of the quartz tube of a tube furnace; before the reaction, removing air in the quartz tube by high-purity nitrogen, rising the furnace temperature to 950-1100 DEG C in the presence of nitrogen, and reacting for 20-60 minutes, wherein when the reaction is performed, the nitrogen gas flow is 3-5L / h and the oxygen gas flow is 0.1-0.5L / h; when the reaction is finished, and naturally cooling the furnace temperature to the room temperature to obtain the ZnO nanometer-micrometer rod with the parallelogram cross section. The preparation method has the characteristics that the process is simple, the product repeatability is good, the crystal quality is high, and the feature size is controllable. The ZnO nanometer / micrometer rod has the function of excellent regulation on optical field and can be used for a similar waveguide Fabry-Perot optical microcavity.

A near-field bolometric tuner based on DC voltage biased graphene. The invention belongs to the field of thermal tuners. The purpose of the present invention is to solve the existing technical problems of using magnetic field to actively control the magneto-optic effect of graphene to control near-field radiation heat transfer because the magnetic field strength is too large to be available in actual production and the strong magnetic field will interfere with electronic components. A near-field radiant heat tuner based on DC voltage bias graphene of the present invention is composed of a receiving end composite structure, a transmitting end composite structure and a spacer arranged between the two, and the receiving end composite structure is composed of a receiving end The DC voltage generator, the receiving end substrate and the receiving end graphene coating are composed; the transmitting end composite structure is composed of the transmitting end DC voltage generator, the transmitting end substrate and the transmitting end graphene coating. The tuner of the invention can have a strong adjustment effect on the near-field radiation heat transfer capability. At the same time, regulation based on direct current does not interfere with the rest of the electronic components.

The invention belongs to the technical field of semiconductors, and relates to a current limiting diode. The invention proposes a new type of current-limiting diode, which uses the technology of growing a charge recovery layer on a thin barrier AlGaN / GaN heterojunction to modulate two-dimensional electron gas. Under the premise of withstand voltage, the advantage of this structure is that the fluorine-based gas used in the etching of the charge recovery layer will hardly cause any etching effect on the barrier layer under the charge recovery layer, and finally self-termination can be realized at the AlGaN interface to achieve the opposite effect. The purpose of precise control of the barrier layer. The invention avoids etching the AlGaN layer and does not cause damage to the AlGaN layer, so the device has larger current density, higher electron mobility and lower on-resistance.

The invention belongs to the technical field of thermal power plant control, and particularly relates to a thermoelectricity load automatic control method. The method comprises the following steps that firstly, function fitting of the relation between intermediate pressure cylinder steam exhaust pressure upper and lower limit and optimal intermediate pressure cylinder steam exhaust pressure and active power is carried out; secondly, according to the relation between the intermediate pressure cylinder steam exhaust pressure upper and lower limit and the optimal intermediate pressure cylinder steam exhaust pressure and the active power, electric load adjusting limit and intermediate pressure cylinder steam exhaust pressure control standards are determined, and a 175MW above and below thermoelectric load coordinated automatic control scheme and an intermediate pressure cylinder steam exhaust pressure automatic control scheme are built; and thirdly, according to the thermoelectric load coordinated automatic control scheme and the intermediate pressure cylinder steam exhaust pressure automatic control scheme, a valve opening degree control scheme is designed. The unit control scheme isdivided into two large control ranges above and below 175 MW, meanwhile, unit different conditions under two ranges can be analyzed, for each working condition, an automatic control scheme is built, and the automation level and the safe and stable degree of system control can be improved.

The invention provides a nitryl asymmetric alpha-diimine nickel complex for preparation of ultrahigh-molecular-weight polyethylene and an intermediate, a preparation method and application of the nitryl asymmetric alpha-diimine nickel complex. The nickel complex has a single catalytic active center, regulation of polymer molecular weight and branching degrees can be realized through changing of aligand structure and polymerization conditions, and high catalytic activity, low cost, performance stability and the like are achieved. The preparation method is mild in condition, short in period andsimple in operation condition. The nickel complex can be applied to catalytic vinyl polymerization, the catalytic activity is up to 4.61*10<6>g mol<-1>(Ni) h<-1>, the weight-average molecular weightMw of prepared polyethylene fluctuates in a range of 8.2-32.8*10<5>g mol<-1>, molecular weight distribution is in a range of 1.8-2.8, the remarkable performance of polyethylene molecular weight control is achieved, and the nickel complex can be used for preparation of ultrahigh-molecular-weight polyethylene; obtained polyethylene is high in branching degree, the melt temperature Tm is in a range of 76.9-117.2 DEG C, and accordingly the polyethylene can be used as engineering plastic at a high environment temperature, and a promising industrial application potential is achieved.