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Copyright of Petroleum Geology & Recovery Efficiency is the property of Petroleum Geology & Recovery Efficiency and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Guangdong Medical Journal is the property of Guangdong Medical Journal Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of South-Central Minzu University (Natural Science Edition) is the property of Journal of South-Central Minzu University (Natural Science Edition) Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food Research & Development is the property of Food Research & Development Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Modern Food Science & Technology is the property of Editorial Office of Modern Food Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Science & Technology of Cereals, Oils & Foods is the property of Science & Technology of Cereals, Oils & Foods Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of China University of Petroleum is the property of China University of Petroleum and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Telecommunication Engineering is the property of Telecommunication Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Mine Automation is the property of Industry & Mine Automation Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to study the cavitation phenomenon of centrifugal pump under large flow condition and the relationship between cavitation and pressure pulsation under the condition, through experimental test, the monitoring points were established in the volute for numerical analysis, the pressure pulsation of centrifugal pump in different cavitation stages under large flow condition was studied, and the unsteady cavitation flow characteristics of centrifugal pump were analyzed. Firstly, the external characteristics and different degrees of cavitation of centrifugal pump were tested by building a closed pipeline test-bed. Then, RNG k-ε turbulence model and full cavitation model were used to calculate a single-stage single suction cantilever centrifugal pump, and the time-domain and frequency-domain characteristics of cavitation flow field and pressure pulsation at monitoring points P1～ P5 on volute were obtained. Finally, based on the numerical results, the steam volume fraction, the velocity vector distribution of the middle section and the pressure pulse at the monitoring point under different cavitation conditions in the impeller were analyzed. The research results show that with the intensification of cavitation, the cavitation area on the suction surface of the blade continues to expand, the blocking effect on the inlet of the flow channel gradually increases, and the main frequency of each pressure pulsation monitoring point on the pump volute also changes significantly. Therefore, the monitoring and analysis for pressure fluctuations on the pump volute can provide reference for the assessment of cavitation phenomenon. [ABSTRACT FROM AUTHOR]

Copyright of Electric Power Automation Equipment / Dianli Zidonghua Shebei is the property of Electric Power Automation Equipment Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Electric Power Automation Equipment / Dianli Zidonghua Shebei is the property of Electric Power Automation Equipment Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food Science & Technology & Economy is the property of Grain Science & Technology & Economy Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Experimental Technology & Management is the property of Experimental Technology & Management Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Mine Automation is the property of Industry & Mine Automation Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Mine Automation is the property of Industry & Mine Automation Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Harbin University of Science & Technology is the property of Journal of Harbin University of Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Petroleum Geology & Recovery Efficiency is the property of Petroleum Geology & Recovery Efficiency and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Petroleum Geology & Recovery Efficiency is the property of Petroleum Geology & Recovery Efficiency and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

An economic operation platform of micro-grid based on LabVIEW is designed by using flexible load control and improved particle swarm optimization. The display interface is designed by LabVIEW. The Matlab script component is used to implant the algorithm into the super-computer. Thus, a platform is constructed with the operation module. The platform has two working modes. Mode 1: PLC serves as the slave-computer, it will transmit real-time parameters such as wind speed and solar radiation to the super-computer. After optimized computation by LabVIEW, the control information is returned to the slave-computer for simulation action, and the operation curve is displayed in the monitoring interface; Mode 2: the model of wind turbines, photovoltaic arrays, batteries and gas turbine is established and programed as the data source of system operation. In addition, 24-hour forecast data such as wind speed and solar radiation can be written to the txt file, which can be read and optimal computation by the super-computer. This experimental platform provides strong support for electrical engineering major students to carry out experiments related to the economic operation of micro-grid. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Mine Automation is the property of Industry & Mine Automation Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

BACKGROUND: Research on patented technology contributes to understanding the development and key technology of the related field, and enhances the ability to grasp the technological developments in this field. OBJECTIVE: To investigate the patent application situation and technical development route in the field of fully-degradable polylactic acid stents. METHODS: We searched the patent applications for fully-degradable polylactic acid stents all over the world, and analyzed relevant information in the following aspects: annual application quantity, the distribution of the main applicants, the branches of the patent technology, the analysis of the important applicants. Afterwards, we focused on the blending modification of polylactic acid stents, and analyzed its core patents and the development of patented technology. RESULTS AND CONCLUSION: The fully-degradable polylactic acid stent is the focus direction of current research in the field of vascular stents. Materials, technique and structural design are the main aspects for patent applications in this field. Among them, the application for improvement of materials is the most frequently conducted, which is the earliest branch of technology in this field. In terms of technical requirements, improving the mechanical properties of scaffolds, controlling the degradation rate of stents, and improving the controlled release of drugs are the main concerns. [ABSTRACT FROM AUTHOR]

Copyright of Research & Exploration in Laboratory is the property of Research & Exploration in Laboratory and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective To classify the imaging growth manner of prolactinoma and explore its relationship between clinical manifestation and the treatment outcome. Methods A total of 168 patients with prolactinoma (60 males and 108 females) who were treated in our department were selected as research target. The relationship between the image characteristics,clinical manifestations and the treatment outcome were compared and evaluated. Results Saddle inside-type growth was more common in younger age and low prolactin level patients(82. 8% ,P< 0.05) ,breakthrough and surrounded type growth was more common in older age( total proportion was 68. 0% ,P <0. 05 ) and high prolactin level patients (total proportion was 66. 2% , P <0. 05). Conclusion The imaging growth manner of prolactinoma will change due to changes in gender, age and prolactin levels, the relationship between them can guide us to explore the etiology and pathogenesis, then choose a reasonable treatment to improve the prognosis. [ABSTRACT FROM AUTHOR]

Copyright of China Pulp & Paper is the property of China Pulp & Paper Magazines Publisher and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective To summarize the methods and experiences of intradural subtemporal anterior transpetrosal approach for petroclival lesions. Methods The clinical data and follow-up results of 10 cases with petroclival lesions who were treated via intradural anterior transpetrosal approach were retrospectively analyzed. Results In this group, there were 10 cases with middle- upper petroclival tumors including 4 meningiomas and 6 schwannomas, total resection was achieved in 9 patients and subtotal resection in 1 patient. No death occurred in these cases. The preoprative symptoms disappeared in 6 patients and relieved in 4 patients. The transient neurological deficit includes temporary mild facial palsy in 2 cases with trigeminal neurinomas,2 cases with facial pain occurred facial numbness after surgery. All the patients were follow-up in 3 to 24 monthes and no one relapse. Conclusion The intradural approach tailors the extent of anterior petrosectomy individually and shorten operating time compared with the epidural one. During opration,CSF was released slowly from the base of the middle fossa and the ambient cistern to increase surgical space. To adjust the exposure of the temporal lobe base properly can lower the injury risk of temporal veins according to the position of Labbe's veins. The intradural approach is suitable for the exision of the tumors in middle-upper petroclival region. [ABSTRACT FROM AUTHOR]

Copyright of Research & Exploration in Laboratory is the property of Research & Exploration in Laboratory and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Northeastern University (Natural Science) is the property of Dongbei Daxue Xuebao and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to select the reasonable operation mode which can greatly reduce the damage to the transformer when failures occur，this paper established the transformer operation simulation model through matlab，simulated the possible operation modes by changing the opening and closing state of the circuit breaker，so as to select the reliable operation modes of the transformer. By setting two phase short circuit fault in different locations，main transformer high voltage side uses the parallel operation mode，low voltage side separately using he parallel operation mode and the splitting operation mode，to simulate transformer line current II period of protection and over - current protection as far distance protection，and to research on the influence of the low voltage side of transformer under the two kinds of operation modes of system operation on system relay protection，so as to give the principle of selecting reliable operation mode for transformers. [ABSTRACT FROM AUTHOR]

A method is introduced to build a simulation experimental platform for the protection of transmission line longitudinal differential by Matlab. By using the experimental simulation platform， students can simulate the criteria based on the power-frequency sine vector，the criteria based on power-frequency component， and the criteria based on zero-sequence current and the imbalance current. The action behavior of the three kinds of protection criteria and the effects of unbalanced current to it are analyzed in the form of illustrations. And the sensitivity of the three kinds of criterion are analyzed by setting different transition resistance. At last，to verify the correctness of the building model，a comparison is completed with the curves of operating characteristic of actual line protection device. Students can understand the principle of line differential protection vividly and deeply by the platform. We have received a good effect by applying it in the teaching. [ABSTRACT FROM AUTHOR]

Copyright of Chinese Journal of Liquid Crystal & Displays is the property of Chinese Journal of Liquid Crystal & Displays and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Wind farm neutral grounding can effectively reduce power frequency overvoltage and arc grounding over voltage, so as to ensure the safe and reliable operation of power system. The author, therefore, establishes the electromagnetic transient simulation model of a wind farm 35 kV power network by PSCAD, by which simulating resistance - grounded neutral system and neutral non - grounding system with the system set single - phase grounding. The simulation result shows that resistance - grounded neutral system suits to wind farm neutral grounding. [ABSTRACT FROM AUTHOR]

In order lo study the influence of hidden failure on self - organized criticality (SOC) of power grid when blackout occurs, this paper analyzed the risk of power grid in self - organized criticality stale under different probability of hidden failures, and simulated SOC - Power Failure model in IEEE39 power grid. The simulation result shows that under the same loading and flow distribution, the scale of power grid blackouts is larger and the system enter self - organized criticality state in advance because of hidden failures. Meanwhile, it shows that the risk of power grid entering self - organized criticality state can be reduced effectively by reducing the probability of hidden failures. [ABSTRACT FROM AUTHOR]