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Search Results: 1 - 10 of 13209 matches for " Pengfei Luo "
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A Modified Method for the Accurate Determination of Chemical Oxygen Demand (COD) in High Chloride Oilfield Wastewater  [PDF]
Shanhui Zhang, Wu Chen, Yang Liu, Pengfei Luo, Huiwen Gu
Open Journal of Yangtze Oil and Gas (OJOGas) , 2018, DOI: 10.4236/ojogas.2018.34023
Abstract: In this work, in order to find a method for the accurate determination of chemical oxygen demand (CODCr) in high chloride oilfield wastewater, the interferences of chloridion (Cl-) on CODCr determination were first studied based on the Chinese national standard GB 11914-89. The results showed that the CODCr values and deviations determined by the classical potassium dichromate (K2Cr2O7) method increased gradually with the increase of Cl- mass concentration in water samples. Then, theoretical and experimental studies on reducing interferences of Cl- on CODCr determination were carried out. The results showed that different concentrations of K2Cr2O7 exhibited different oxidation capacities on Cl-, while having little effects on the oxidation of organic compounds. More specifically, when the concentration of K2Cr2O7 was 0.025 mol·L-1 and the mass ratio of HgSO4:Cl- was 10:1, the interferences of Cl- on CODCr determination were the slightest. Finally, a low concentration oxidant method was proposed for the accurate determination of CODCr in high chloride oilfield wastewaters. The performances of the proposed method were verified by the simulated and actual high chloride oilfield wastewater. The results showed that when Cl- ≤ 20,000 mg·L-1 and COD < 100 mg·L-1, the relative prediction errors of CODCr provided by the proposed method were acceptable, which revealed that the low concentration oxidant method is feasible and reliable for the determination of CODCr in high chloride oilfield wastewater.
Mineralogical Characterization of Aeolian Sands from Inner Mongolia, China  [PDF]
Brian Nzuki, Liqun Luo, Pengfei Zhou, Christophe Niyonzima, Xu Tu
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2019, DOI: 10.4236/jmmce.2019.73007
Abstract: Aeolian sand sample from Tengger desert, located in the southern part of Inner Mongolia (China) was characterized for major elemental composition and mineralogy by EPMA, XRF and XRD methods. The objective of this research was to provide data which would be a guide to aid future beneficiation of this sand, especially for the economic exploitation of feldspar and quartz which have a wide range of applications in various industries like plastic, paint, ceramics and glass industries. The elemental analysis of the sample was carried out by X-ray fluorescence spectrometer and chemical analysis while the minerals present were identified by an X-ray diffraction analyzer. The sand was discovered to contain basically SiO2 (82.43%), Al2O3 (7.68%), Na2O + K2O (4.37%) and TiO2 and Fe2O3 as the main impurities. It was also discovered that grinding of the sand is required to enhance the liberation of the minerals and the separation methods recommended are magnetic separation and flotation. It was therefore concluded that aeolian sand is a suitable source of quartz and feldspar for use in the industry.
Efficacy of Radiofrequency Hyperthermia Combined with Chemotherapy in Treatment of Malignant Pericardial Effusion Caused by Lung Cancer
Pengfei LUO,Peiguo CAO,Zhiping YAO
Chinese Journal of Lung Cancer , 2011, DOI: 10.3779/j.issn.1009-3419.2011.07.06
Abstract: Background and objective Malignant pericardial effusion is one of the serious complications of lung cancer and lack effective treatment methods. The aim of this study is to evaluate the efficacy and safety of radiofrequency hyperthermia combined with chemotherapy for patients with malignant pericardial effusion caused by lung cancer. Methods Fifty-five patients with malignant pericardial effusion caused by lung cancer were divided into hyperthermia combined with chemotherapy group (combined therapy group) and chemotherapy group. The combined therapy group was treated with radiofrequency hyperthermia after the pericardiocentesis and intracavitary injection (cisplatin 20 mg and dexamethasone 5 mg), when patients’ general state of health improved, systemic chemotherapy was performed. The chemotherapy group was treated only with intracavitary injection and systemic chemotherapy. Intracavitary chemotherapy was performed for 1-6 times (average 3 times). Hyperthermia was performed twice per week with an average of 6 times following intracavitary and systemic chemotherapy. The temperature of intracavitary was 40.5 oC-41.5 oC for 60 min during the hyperthermia periods. Systemic chemotherapy consists of cisplatin (75 mg/m2) and vinorelbine (50 mg/m2). Results The complete remission rate (CR) of malignant pericardial effusion was 54.3% and the response rate (RR) was 91.4% in the combined therapy group, while the rates of CR and RR of chemotherapy group were 25.0% and 70.0%, and the differences of CR and RR between the two groups were significant (P<0.05). After treatment, the quality of life improved significantly in both groups, but the combined therapy group had a higher KPS score than in the chemotherapy group (P<0.05). The adverse events associated with the chemotherapy included gastrointestinal toxicity and myelosup-pression, and there were no significant differences between the two groups. The main side effects associated with radiofrequency hyperthermia included local skin ache (8.6%) and induration of subcutaneous fat (5.7%). Conclusion Radiofrequency hyperthermia combined with chemotherapy is effective in treatment of malignant pericardial effusion and can significantly improve the quality of life of patients without increasing the toxicity of chemotherapy, and side effects could be tolerable.
To Update Ideas, to Explore New Model of Financial Managemen  [PDF]
Pengfei Zhao
iBusiness (IB) , 2013, DOI: 10.4236/ib.2013.53B040

With the reform and opening up of china, and the globalization of economy, Chinese enterprises are facing more and more complex financial environment, especially since 2008 financial crisis, the government's macro-control, the relative appreciation of RMB, rising labor costs and other non-financial constraints factors, have greatly changed the financial management content, objectives, theory, methods, and ways of working etc, enterprises financial management are suffering from a huge challenge. This paper analyzes the main problems of Chinese enterprises in financial management, and gives some suggestions to work out these problems.

Study on Air Crash Compensation Based on Private International Law Development Trend  [PDF]
Pengfei Ji
Open Journal of Social Sciences (JSS) , 2015, DOI: 10.4236/jss.2015.32018
Abstract: In recent years, air crashes have occurred frequently, so the resulting compensation issues are extremely complex. Air crash compensation is mainly involved with the amount of compensation, application of law and jurisdiction, including domestic law and private international law. The provisions on it are different in different countries. How to protect the air crash victims’ rights effectively is always a difficult problem in the research of scholars of all countries. In this paper, combining with the typical air crash cases, the author puts forward the problems in the private international law and gives some suggestions to further improve the legislation of private international law.
Discussion on Issues of Inheritance of Internet Virtual Property  [PDF]
Pengfei Ji
Modern Economy (ME) , 2015, DOI: 10.4236/me.2015.63028
Abstract: With the increasingly close connection between the Internet and citizens, the Internet virtual property is increasing in large amount. Although the viewpoints the parties hold about “virtual property” are different in the judicial practice, the analysis from the perspective of legal principle indicates that virtual property should be included in the legacy as “legitimate property” and legally inherited by its successor without doubt. In addition, there is a need to improve the laws and regulations on Internet user protocol and coordinate the interests of all parties.
Study on the Legalization of Minor Internet Security  [PDF]
Pengfei Ji
Beijing Law Review (BLR) , 2015, DOI: 10.4236/blr.2015.61007
Abstract: As a virtual place with the feature of double-edged sword, the adverse effects the Internet has on the minors can be seen not only from the information it carries but also from a series of Internet products developed based on the virtual Internet environment. Since these adverse effects have imperceptibly endangered the minors who are in their critical growth period from all aspects, we must learn from the foreign advanced legislative experience and take measures including the definition of legislative regulation, improvement of guardianship system, establishment of regulatory authorities and so on to protect the legitimate rights and interests of the minors.
A Comparative Study on the Domestic and Overseas Public Interest Litigation System  [PDF]
Pengfei Ji
Open Journal of Political Science (OJPS) , 2015, DOI: 10.4236/ojps.2015.53020
Abstract: The rapid economic development of our country is accompanied with a series of problems that should not be ignored, including environmental pollution, erosion of state assets, infringement on public interest and so on, but it is difficult to properly solve these problems in short term as a result of imperfection of the existing legal system and inadequate supervision. Through the comparative study on the public interest litigation (PIL) system of major countries at overseas and combined with China’s national condition, the existing legal system should be improved specifically in the respect of expanding plaintiff’s qualification and extending the statute of limitations.
Research on the Laws Related to the Issues of Residential Parking Spaces and Parking Garages  [PDF]
Pengfei Ji
Journal of Service Science and Management (JSSM) , 2015, DOI: 10.4236/jssm.2015.82027
Abstract: In recent years, the issue of the ownership of residential parking spaces has caused increasingly lots of disputes. “Real Right Law” has given some provisions to determine the ownership of residential parking spaces, but there also exist some problems. The author has proposed some specific solutions after analyzing relevant provisions of “Real Right Law” on the issue of residential parking spaces.
Current Status of Civil-Service System in China and Its Orientation to Reform  [PDF]
Ji Pengfei
Chinese Studies (ChnStd) , 2015, DOI: 10.4236/chnstd.2015.42007
Abstract: Service is a very important system in civil action. It runs through civil proceedings and has significant effect on the whole process of civil action. The current service of civil procedure law in China focuses on the ex officio doctrine. Its main purpose is to protect the course of litigation rather than the parties’ procedural interests. In judicial practice, “difficult service” is still a problem which troubles courts at all levels. This article analyses the current status of civil-service system in China and proposes a reform-oriented service system in the country.
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