Disclosed in the present invention are a sulfonate-betaine-type hydrophobic associated polymer and a preparation method therefor. The preparation process of the sulfonate-betaine-type hydrophobic associated polymer is as follows: mixing acrylamide and acrylic acid in an aqueous solution, adjusting pH of the system to about 6 to 8, adding 3-(methacrylamidopropyldimethylamino) propionate, N-aryl-N-alkyl (meth) acrylamide and sodium dodecyl sulfate, stirring the mixture until the solution becomes clear, passing nitrogen gas to remove oxygen, then adding a photoinitiator azobisisobutylamidine dihydrochloride, and performing polymerization under photoinitiation conditions. The present invention combines the advantages of a two-tailed hydrophobic associated polymer and a betaine-type polymer, significantly increasing the thickening property, temperature resistance, salt resistance, hydrolysis resistance, and thus can be used as an oil displacing agent or an acid fracturing thickener for increasing oil recovery in oil field development. The preparation method is reliable in principle, simple in operation, and has broad market prospects.

Provided is an apparatus for transporting a prefabricated member of a prefabricated building, comprising a bottom plate (3) provided with wheels (3) on its lower end face, a climbing mechanism (7) arranged on the lower end face of the bottom plate (3), and a position-limiting mechanism arranged on the upper end face of the bottom plate; the climbing mechanism (7) comprises a ladder and two ladder grooves fixed in parallel on the lower end face of the bottom plate, and is provided with two position-limiting mechanisms which are capable of securing prefabricated wall panels very well; use of the invention is also convenient and quick, not only reducing safety risks but also improving transportation efficiency.

A high speed railway cement-emulsified asphalt mortar agitating, pumping and pouring vehicle, comprising a tractor (1) and a vehicle-mounted container (4) frame. A wastewater collection tank, an aggregate hopper (9), a pumping system and an extension ladder are installed on a tractor (1) chassis; the vehicle-mounted container (4) frame is provided with an agitation tank therein; the agitation tank is externally connected to a liquid material and dry material feeding system; and the liquid material and dry material feeding system comprises a dry powder bin (16) and a liquid material storage tank. A mortar agitating, pumping and pouring system is employed to convey the agitated finished product mortar onto a line, achieving the following technical effects: fixed-point agitation, long-distance conveying and pouring, large-capacity design of the bin and the material storage tank, adjustment of the mortar formula as desired using universal formula program software for high-and-low elastic modulus cement-emulsified asphalt mortar, and automatic control of the material batching, loading and measuring process. The present invention improves construction efficiency, saves production cost, enables mortar production quality to satisfy the requirements stated in a construction specification, saves energy and is environmentally friendly during construction, and is user-friendly in operation.

The present disclosure provides methods, pharmaceutical compositions, dosing regimens, and kits comprising 4,4'-trans-dihydroxystilbene (DHS), including methods of treating cancer in a subject and methods of decreasing or reversing resistance to a DNA damaging agent in a subject.

Provided is a method for preparing a polycarbosilane by cracking and rearranging a cyclic silane compound or chain polysilane under the catalysis of a boron-containing catalyst in a trace amount (less than 1 wt%). In the method, polydimethylsilane (denoted as PDMS) or a pyrolysis product thereof, i.e. a liquid silane-carbosilane compound (denoted as LPS), is used as the raw material, less than 1 wt% (with respect to the dosage of the raw material) of the boron-containing catalyst is added, and then the temperature is gradually increased to the reaction temperature to perform the pyrolysis/rearrangement reaction under normal pressure or high pressure so as to obtain solid polycarbosilane (PCS) having a higher ceramic yield. This method has a short reaction time, a high synthetic yield, a good product quality, simple equipment and a safe operation; and the polycarbosilane prepared is a precursor polymer for SiC, and can be used for the preparation of a SiC fibre and a SiC-based composite.