Electric Power Research Institute, China Southern Power Grid

Advance Will Technology Limited

Guangzhou Jet Bio-Filtration Co., Ltd.

Hubei Dstech Co. Ltd

Shenzhen Power Supply Co., Ltd

Xiaolin Li

Bin Feng

Wenbo Zhu

Mingli Fu

Lei Jia

Yunpeng Zhan

Baojun Hui

Yifan Zhang

Xiaomei Mu

Xiao Yan Xu

Jianhua Yuan

Hong Rao

Shukai Xu

Bin Zhang

Shuai Hou

Jianhua Zhu

Zhensheng Zhong

Huilun Li

Chuang Fu

Lingmeng Fan

Jialiang Su

Kaiwen Lin

Ni Peng

Wenjiang Wang

Yongjie Nie

Guoxing Wu

Shu Xu

Xiao Chen

The present application provides a high-voltage cable insulation material continuous extrusion processing characteristic evaluation and optimization method and apparatus. The method comprises: continuously extruding a material under test as a melt, measuring and recording an inlet pressure P, a mass growth rate w, and the diameter D' of a melt sample strip, and obtaining apparent shear viscosity η(t) (step A1); obtaining an outlet expansion rate δ (step A2); recording and displaying curves η(t) and δ(t), and treating the time corresponding to an increase of a set percentage on the curves as a cross-linking starting time TX (step A3); selecting a reference sample for testing, and determining a cross-linking reaction starting time TS according to η(t) and δ(t) curves of the reference sample (step A4); and defining an index α according to Tx and Ts.

High-voltage cable insulation material continuous extrusion processing characteristic evaluation and optimization method and apparatus

The present invention provides a polypropylene cable protective layer and a preparation method thereof. The polypropylene cable protective layer sequentially includes a dielectric layer, a buffer layer and an insulating layer from the inside to the outside, and the thickness of the dielectric layer accounts for 5%˜12% of the thickness of the polypropylene cable protective layer; the thickness of the buffer layer accounts for 17%˜25% of the thickness of the polypropylene cable protective layer; the dielectric layer, the buffer layer and the insulating layer are respectively obtained by the wrapping of a polypropylene film A, a polypropylene film B and a polypropylene film C. The polypropylene cable protective layer of the present invention forms a dielectric gradient, and realizes the improvement of the insulation strength and voltage level of the power cable, and the increase of the transmission capability.

Polypropylene cable protective layer and preparation method thereof

Provided are cell culture apparatus and method. The cell culture apparatus comprises a culture column and a perfusion system, the culture column comprising a first and a second tube-connecting caps and a support for cells to attach and grow thereon. The first and the second tube-connecting caps are respectively provided with a perfusion inlet and a perfusion outlet; The perfusion system comprises a culture medium storage device, a perfusion tube and a perfusion pump. A complete and closed culture column is formed in the cell culture device after the cells are inoculated, and the culturing is completed by the perfusion system to avoid contamination.

Cell culture apparatus and method

The present invention provides a handheld sweeping and mopping structure, comprising a handle and a body shell, wherein a sweeping and mopping module, a water tank module, a driving module, a garbage collection module, a control module and a power supply module are provided inside the body shell. The handheld sweeping and mopping structure of the present invention can sweep the floor and also mop the floor, has higher efficiency and better effect than the conventional sweeping and mopping mode; and meanwhile, a disposable garbage box which is convenient to replace is used, and it is unnecessary to clean the garbage box repeatedly.

Handheld sweeping and mopping structure

A multi-functional automatic switching circuit for direct current ice melting and a switching method thereof are provided. The automatic switching circuit comprises at least one sub-switching circuit. The sub-switching circuit comprises a six-pulse current converter (R) with no saturable reactor, six reactors (L, L, L, L, L, and L), three three-phase knife switches (Sac, Sac, and Sac), and five single-phase knife switches (SV, SV, SV, SV, and SV). The sub-switching circuits in series connection or parallel connection, four direct current side switching knife switches (Sdc, Sdc, Sdc, and Sdc), an isolation knife switch (K), a breaker (QF) and a control and protection system (CP) may form an automatic switching circuit for six-pulse or twelve-pulse direct current ice melting. The automatic switching circuit with no saturable reactor reduces noise during operation, achieves mutually automatic switching among modes of reactor switching, ice melting and test, and may complete the through-flow test of the automatic switching circuit without switching in a power transmission line, thereby solving the problem of daily operation and maintenance.

Multi-functional direct current ice melting automatic switching circuit and switching method thereof

A method for removal of the monosaccharide in oligosaccharides production which includes the step of culturing the yeast. A further step involves mixing 8%-12% (W/W) of yeast based on the weight of oligosaccharides and 0.1%-0.5% (W/W) of carbamide as nitrogen source with raw oligosaccharide syrup, and then adjusting the pH value to 4.5-6.0. A further step involves culturing the above oligosaccharides syrup at 23&#xb0; C.-26&#xb0; C. for 20-30 hours with intermittent agitation.

Method for the removal of monosaccharide in oligosaccharides production

A method to control the distribution of the starch sugar's molecular weight by controlling of Ultra-low DE value during the reaction was invented. The method comprising blending starch with water to get starch slurry, and then mixing it with the 0.01%-0.03% of CaClbased on dried starch. The next step involves adjusting the pH of the starch slurry. A further step involves adding 0.03%-0.08% of heat-resisting &#x3b1;-amylases based on dried starch to the starch slurry described above. A further step involves controlling the production under optimal reaction conditions.

Method to control the distribution of the starch sugar's molecular weight in oligosaccharides production

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Guangzhou, China

Xiaolin Li