Commenting on the recent renovations, Ms Stephens said: “I am absolutely delighted with the work that has been carried out and Dortech’s customer service and professional installation has been second to none. In the late 19th and early 20th century, with the transition from free capitalism to monopoly capitalism, the factory itself had undergone complex and profound changes. Constantly adopt new technology to make the production rapid development; The scale of production keeps expanding, competition intensifies, and a large-scale monopoly enterprise is produced. The separation of rights and ownership and the formation of a professional management stratum; The scientific management system has been established, and a series of scientific management theories have been formed to make the enterprises mature and become modern enterprises. He added: "austerity has failed and will only continue to undermine our economy in the brexit negotiations. Investment refers to the specific economic subject in order to reap the benefits in the foreseeable future period or capital appreciation, within a certain period of a certain subject matter in the field of putting enough amount of money or currency equivalent physical economic behavior. It can be divided into physical investment, capital investment and securities investment. The former is to put money into the enterprise, make a certain profit through production and operation. The latter is to purchase the shares and corporate bonds issued by the enterprise and indirectly participate in the profit distribution of the enterprises. Securities investment analysis method mainly has the following three: analysis of fundamental analysis, technical analysis, evolution, in which the fundamental analysis is mainly used in the choice of investment subject matter, technical analysis and evolution analysis is mainly used in the specific investment operation on the judgment of time and space, as a useful supplement to improve effectiveness and reliability of investment analysis. Awarded a UK patent, Senior’s PURe® range of energy-efficient aluminium windows and doors is the first on the UK market to benefit from an enhanced thermal barrier manufactured from expanded polyurethane foam (PUR). Traditionally used in cladding and insulation products, the innovative use of PUR as a thermal barrier in windows and doors gives the PURe ® range the potential to achieve U-values as low as 0.71W/m2 K when calculated as a commercial CEN standard window and 0.93W/m2 K when calculated as a CEN standard door. The accounting income follows the historical cost principle and the matching principle, which is conducive to the objective reflection of the business management responsibility of the enterprise management authorities. But, due to the historical cost principle inherent defects, especially according to the present value of revenue and expenses by historical cost line, makes the calculation of accounting earnings lack of inner logical unity, and the matching principle is difficult to carry out, so that the book value of assets can not reflect its real value, cost cannot be fully compensated. And the economic benefit is measured in the current value, which reflects the actual value of the asset, which is beneficial to the full compensation of the cost.