This paper has analyzed the principles of traditional fault location methods which including traveling wave method, impedance method and signal injection method. And it introduced matrix neural networks, genetic algorithms, ant colony optimization, Petri nets rough sets based on distribution automation. Then this pointed out their applications in network location. Finally, discusses future technology research development prospects, taking into account trends users' requirements power supply...

<title>Abstract</title> Background An atypical type A thymoma variant was recently added to the World Health Organization classification of in 2015. This novel form presents with hypercellularity, increased mitotic activity, and necrosis. In particular, necrosis seems be related postoperative recurrence metastasis, but clinical significance these changes still needs studied. Case presentation: 76-year-old man underwent thoracoscopic surgery for tumour resection due an anterior mediastinal...

Mao, Yanhui MD1; Ye, Liansong MD2; Wang, Fanrong MD3; Qin, Jiamin Wen, Liming MD1 Author Information

With the increasing consumption of electric energy in China, management power becomes more and important. It is essential for analysis appliances to make a reasonable way electricity consumption. Aiming at problem low accuracy frequency sampling recognition, this paper proposes non negative matrix decomposition method feature extraction electrical data. The peak density data calculated by algorithm, taken as initial cluster center fuzzy c-means algorithm. States each device are obtained....

This paper presents the design specifications and features of smart grid software system. system as a whole (software hardware) has been designed, implemented, tested integrated by using self-developed configurable feeder terminal unit (FTU) product named HN-F650. The most prominent feature is reconfiguration technology kinds protection logic. In way, users may draw logic diagrams scalable vector graphics (SVG) in host machine download them into remote FTU. Reconfiguration technology,...

As the key link of power transmission and distribution, energy saving emission reduction work substation has important significance.Due to its special nature, it is very difficult evaluate analyze smart substation.The purpose construct evaluation system operation status in order promote upgrading transformation.This paper discussed compared several methods for construction implementation index substation, which can provide a reference establishment.

Based on the design of testing equipment for a small satellite barycenter, this paper introduces three-point principle barycenter platform and describes realization system. The hardware real measuring system involves with transmission machine an electrical box computer. Industry process control software serves as interface by programmable language visual basic in software. practical test shows that has achieved requirement. Finally, some improved elements mechanical are proposed paper.

This paper presents the design proposal of distribution network monitoring unit based on dual-DSP. A detailed description hardware structure about device is introduced which including signal scheduling, SPI communication, serial human-computer communication and communication. Additionally, describes software process master slave DSPs. Then analog precision test protection response are carried out. The result shows that correct.

This paper presents a new algorithm for two-terminal fault location in transmission line. It creates fault-based information ranging function. According to the characteristic of function, it analyzes trajectory function vector and finds failure point by recursive uses Pscad Matlab simulate prove its correction.

This study presents a ranging algorithm which requires only voltages and currents measured from the two terminals to establish equations. It divides line into certain parts uses every point as failure solve three groups of impedances. When function is established by impedance data reaches minimum, corresponding right point. Simulations show that it can be used for any type may not cause error incorrect parameters.

In this paper, a destructive test method is first proposed for pulley durability test. And the endurance testing machine designed in accordance with method. The provides an environment variable temperature, speed, and tension. of can be tested by continuous operation. Field experimental results show that detector used production quality assurance has strong credibility.

Abstract Background Von Hippel–Lindau (VHL) syndrome is a rare genetic tumor characterized by the recurrent development of multiple benign or malignant tumors involving organs throughout patient’s life. It easy to precisely diagnose when patient has characteristic central nervous system hemangioblastomas (CNS-H) as main manifestation.VHL disease can be classified into type 1,2A,2B, and 2C based on gene mutation occurrence. Case presentation This paper presents case 29-year-old female who...

Primary cancer of the appendix is rare and often difficult to diagnose preoperatively due lack specific clinical symptoms. Autoimmune encephalitis (AIE) most common cause non-infectious encephalitis. The etiologies AIE include tumors (paraneoplastic), infections (parainfections), or recessive infections. that have been reported thymomas, ovarian teratomas, lung cancers, breast cancers. However, there are no reports occurring after surgery for appendiceal cancer. This report describes...

Neuroendocrine tumors usually arise from the gastrointestinal and pulmonary tracts rarely skin. We report a unique case of high-grade neuroendocrine carcinoma with positive steroid hormone receptors in primary skin groin.A 79-year-old female presented lump her left inguinal region for 15 years that grew gradually. The tumor cells were arranged sheets, solid nests, bands within rich network thin-walled capillaries. Mucin was abundant stroma, exhibited lesions, significant necrosis, frequent...