in this paper, a novel control method for photovoltaic converter connection to the national gridis presented, so in addition to the injection control by solar arrays to the grid, this method cancompensate reactive power and harmonics in the load current. the system will be connected inparallel between the grid and load. the proposed system supplies all load power consumption(including active po...

BACKGROUND Although the evidence to support influenza vaccination is poor, it is promoted by many health authorities. There is uncertainty about the effectiveness of interventions to increase influenza vaccination rates in those 60 years or older. OBJECTIVES To assess effects of interventions to increase influenza vaccination rates in those 60 or older. SEARCH STRATEGY We searched the Cochr...

It is the fundamental intention of ethnic work in new era to forge consciousness Chinese nation community, and it main line maintain unity stability motherland. The national traditional sports are “living” soul with cultural characteristics historical factors formed by ancestors minorities long history. has a natural advantage for casting community college students. In development teaching coll...

We describe the mechanization of recent examples of compositional reasoning, due to Charpentier and Chandy [4]. The examples illustrate a new theory for composition proposed by Chandy and Sanders [2, 3], based on the so-called existential and universal properties. We show that, while avoiding hand proof mistakes, a such compositional reasoning can be mechanized quite straightforwardly. We also ...

The effective action for type II string theory compactified on a six torus is N = 8 supergravity, which is known to have an E 7 duality symmetry. We show that this is broken by quantum effects to a discrete subgroup, E 7 (Z), which contains both the T-duality group O(6, 6; Z) and the S-duality group SL(2; Z). We present evidence for the conjecture that E 7 (Z) is an exact 'U-duality' symmetry o...

(2) Let D be a non empty set, S be a non empty subset of D, f be a binary operation on D, g be a binary operation on S, d be an element of D, and d′ be an element of S such that g = f [:S, S :] and d′ = d. Then (i) if d is a left unity w.r.t. f , then d′ is a left unity w.r.t. g, (ii) if d is a right unity w.r.t. f , then d′ is a right unity w.r.t. g, and (iii) if d is a unity w.r.t. f , then d...

The South Pacific countries of Vanuatu, Samoa, and Papua New Guinea have ascended rapidly up the development spectrum in recent years, refining an independent and post-colonial economic and political identity that enhances their recognition on the world stage. All three countries have overcome economic, political and public health challenges in order to stake their claim to sovereignty. In this...

the fundamental belief in sikhism is that god exists not merely as an idea or concept, but as a real entity. god is indescribable, yet knowable and perceivable to anyone who is prepared to dedicate the time and energy to become perceptive to his persona. the gurus never spoke about proofs of the existence of god. for them, he is too real, and something obvious does not require any logical proof...