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Changes in land-uses and fertilization are important factors regulating methane (CH4) emissions from paddy soils. However, the responses of soil CH4 emissions to these factors and the underlying mechanisms remain unclear. The objective of this study was to explore the effects of land-use conversion from paddies to orchards and fertilization on soil CH4 fluxes, and the abundance and community compositions of methanogens and methanotrophs. Soil CH4 fluxes were quantified by static chamber and gas chromatography technology. Abundance and community structures of methanogens and methanotrophs (based on mcrA and pmoA genes, respectively) were determined by quantitative real-time PCR (qPCR), and terminal restriction fragment length polymorphism (TRFLP), cloning and sequence analysis, respectively. Results showed that land-use conversion from paddies to orchards dramatically decreased soil CH4 fluxes, whereas fertilization did not distinctly affect soil CH4 fluxes. Furthermore, abundance of methanogens and methanotrophs were decreased after converting paddies to orchards. Fertilization decreased the abundance of these microorganisms, but the values were not statistically significant. Moreover, land-use conversion had fatal effects on some members of the methanogenic archaea (Methanoregula and Methanosaeta), increased type II methanotrophs (Methylocystis and Methylosinus), and decreased type I methanotrophs (Methylobacter and Methylococcus). However, fertilization could only significantly affect type I methanotrophs in the orchard plots. In addition, CH4 fluxes from paddy soils were positively correlated with soil dissolved organic carbon contents and methanogens abundance, whereas CH4 fluxes in orchard plots were negatively related to methanotroph abundance. Therefore, our results suggested that land-use conversion from paddies to orchards could change the abundance and community compositions of methanogens and methanotrophs, and ultimately alter the soil CH4 fluxes. Overall, our study shed insight on the underlying mechanisms of how land-use conversion from paddies to orchards decreased CH4 emissions.

Activation of presynaptic group II metabotropic glutamate receptors (mGluR2/3) inhibits drug reward and drug-seeking behavior, but the role of N-acetylaspartylglutamate (NAAG), an agonist of endogenous mGluR2/3, in heroin reward and heroin-seeking behavior remained unclear. Here, we aimed to explore the effects of exogenous NAAG on heroin self-administration and heroin-seeking behavior. First, rats were trained to self-administer heroin under a fixed ratio 1 (FR1) schedule for 10 days, then received NAAG (50 or 100 μg/10 μL in each nostril) in the absence or presence of LY341495 (1 mg/kg, i.p.), an antagonist of mGluR2/3, on day 11 and the effects of NAAG on heroin self-administration under FR1 were recorded for 3 consecutive days. Motivation was assessed in heroin self-administration under a progressive ratio schedule on day 11 in another 5 groups with the same doses of NAAG. Additional rats were withdrawn for 14 days after 14 days of heroin self-administration, then received the same pharmacological pretreatment and were tested for heroin-seeking behaviors induced by heroin priming or cues. The results showed that intranasal administration of NAAG significantly decreased intravenous heroin self-administration on day 12, but not on day 11. Pretreatment with LY341495 prior to testing on day 12 prevented the inhibitory effect of NAAG on heroin reinforcement. The break-point for reward motivation was significantly reduced by NAAG. Moreover, NAAG also significantly inhibited the heroin-seeking behaviors induced by heroin priming or cues and these were restored by pretreatment with LY341495. These results demonstrated that NAAG, via activation of presynaptic mGluR2/3, attenuated the heroin reinforcement, heroin motivational value, and heroin-seeking behavior, suggesting that it may be used as an adjunct treatment for heroin addiction.

Land use conversion and fertilization have been widely reported to be important managements affecting the exchanges of greenhouse gases between soil and atmosphere. For comprehensive assessment of methane (CH

The novel Cr-containing low alloy steels have exhibited good corrosion resistance in CO₂ environment, mainly owing to the formation of Cr-enriched corrosion film. In order to evaluate whether it is applicable to the CO₂ and H₂S coexistence conditions, the corrosion behavior of low-chromium steels in CO₂-H₂S environment with high pressure and high temperature was investigated using weight loss measurement and surface characterization. The results showed that P110 steel suffered localized corrosion and both 3Cr-P110 and 5Cr-P110 steels exhibited general corrosion. However, the corrosion rate of 5Cr-P110 was the highest among them. The corrosion process of the steels was simultaneously governed by CO₂ and H₂S. The outer scales on the three steels mainly consisted of FeS1-x crystals, whereas the inner scales on Cr-containing steels comprised of amorphous FeS1-x, Cr(OH)₃ and FeCO₃, in contrast with the amorphous FeS1-x and FeCO₃ mixture film of P110 steel. The more chromium the steel contains, the more chromium compounds the corrosion products contain. The addition of chromium in steels increases the uniformity of the Cr-enriched corrosion scales, eliminates the localized corrosion, but cannot decrease the general corrosion rates. The formation of FeS1-x may interfere with Cr-enriched corrosion scales and lowering the corrosion performance of 3Cr-P110 and 5Cr-P110 steels.

Silurian reservoir in Ta-zhong Oilfield, western china, is a thin-interbed, low-permeability reservoir with buried depth from 4000 to 4500m. The sand distribution in this reservoir is heterogeneous both vertically and horizontally. Horizontal well with segregated completion and multi-stage fracturing is taken as an efficient technology to exploit this kind of reservoir. However, the existence of many mudstone interlayers makes the design of completion and fracturing difficult.This paper will provide a case study on design and operation of multi-stage fracturing of a horizontal well in Ta-zhong Silurian reservoir. This well was fractured twice using two different technologies, firstly hydraulic jetting fracturing and then packer-segregated fracturing. Both the two operations encountered abnormal pumping pressure and sand out. The design and implementation process of both technologies will be introduced in this paper, and the challenges facing the completion and fracturing design will be highlighted. The causes to the abnormal pumping pressure and sand out will be analyzed comprehensively through numerical modeling and comparative calculation.The results show that the defective completion design is the main cause of the failures of the two operations. For hydraulic jetting fracturing, the ill-considered jetting points and improper jetting space cause the difficulties for fracture initiation and propagation and therefore the sand out. For packer-segregated fracturing, the inappropriate perforating interval leads to simultaneous initiation of multiple fractures in each stage. These fractures interfere with each other during propagation, leading to great near-wellbore pressure loss and width reduction for each fracture, therefore the abnormal high pumping pressure and sand out were encountered. The acting mechanism of induced stress and fracture interaction and reorientation are illuminated in this paper. A bunch of ways to avoid these problems during multi-stage fracturing of a thin-interbed sandstone reservoir is also proposed from both designing aspect and operating aspect.Nowadays, horizontal well with multi-stage fracturing is a common-used technique in tight thin-interbed formations. However, the design of a segregated completion and multi-stage fracturing is still a nodus for such formations. This paper gives a detailed introduction of a failure case and comprehensively analyzes the causes of these failures from geology to engineering, therefore gives a lesson for avoiding this kind of failures and optimizing a staged fracturing design in tight thin-interbed reservoirs.

A pilot plant scale hollow fiber membrane system was developed for the removal of dissolved oxygen from boiler feed water via vacuum degassing process. Feed water was introduced to the shell side; a vacuum was applied to the lumen side of the hollow fiber. The effects of water flow rate, vacuum level, and water temperature on removal efficiency of dissolved oxygen and mass transfer coefficient were investigated. The membrane fouling issue was further addressed on the membrane used on the full-scale system. The foulants were identified by SEM, ATR/FTIR, EDX and water analysis to be the organic matter with the combination of aluminum silicate. Mass transfer resistances of the fouled membrane were also theoretically calculated. Finally, two membrane cleaning methods were investigated and the air backwash method was found to be effective to clean the fouled membrane and was recommended as the regular cleaning method.

Recent studies suggest that Epstein-Barr virus (EBV) may act as a helper virus for the development of hepatocellular carcinoma by promoting replication of the hepatitis C virus (HCV) in the infected liver. Detection of EBV DNA in a high percentage of HCV-positive human hepatocellular carcinomas (HCC) from Japanese patients has supported this concept. In order to determine whether EBV infection is associated with HCC, we examined paraffin-embedded tissues from 31 cases of non-cirrhotic livers with hepatocellular carcinoma for the presence of EBV, HCV and hepatitis B virus (HBV) infection. RNA prepared from tumor samples were used as a template for reverse transcription followed by double-nested PCR with primers for the 5' untranslated region (NT) of HCV. DNA extracts of tumor samples were tested by single polymerase chain reaction for the detection of EBV and HBV (X- and/or S-gene) DNA sequences. To control for nucleic acid integrity, all tumor samples were amplified for human beta-globin DNA by polymerase chain reaction and subjected to Southern blot hybridization. None of the cases was found to be positive for EBV. Ten HCC cases (32%) tested positive for HCV and 12 HCC cases (38%) tested positive for HBV. Six of the surveyed patients had nucleic acids of both HCV and HBV in their tumor tissue. All HCC tumor samples were positive for beta-globin. Our study shows that HCV and HBV infections, but not EBV infection, are associated with hepatocarcinogenesis in non-cirrhotic livers. Other unknown risk factors seem to be in effect in the development of hepatocellular carcinoma in non-cirrhotic livers.

The hyperfine structure (hfs) splittings of the $4{D}_{5/2}$ state for two isotopes of $^{87}\mathrm{Rb}$ and $^{85}\mathrm{Rb}$ atoms are measured based on double-resonance optical pumping spectra in a $5{S}_{1/2}\text{\ensuremath{-}}5{P}_{3/2}\text{\ensuremath{-}}4{D}_{5/2}$ ladder-type atomic system. The frequency calibration is performed by employing a wideband fiber-pigtailed phase-type electro-optic modulator together with a Fabry-P\'erot cavity to cancel the error arising from nonlinear frequency scanning. The hfs magnetic dipole constant $A$ of the $4{D}_{5/2}$ state is determined to be \ensuremath{-}16.801 \ifmmode\pm\else\textpm\fi{} 0.005 MHz for $^{87}\mathrm{Rb}$ and \ensuremath{-}4.978 \ifmmode\pm\else\textpm\fi{} 0.004 MHz for $^{85}\mathrm{Rb}$. The hfs electric quadrupole constant $B$ of the $4{D}_{5/2}$ state is determined to be 3.645 \ifmmode\pm\else\textpm\fi{} 0.030 MHz for $^{87}\mathrm{Rb}$ and 6.560 \ifmmode\pm\else\textpm\fi{} 0.052 MHz for $^{85}\mathrm{Rb}$. The values of $A$ and $B$ for the $^{87}\mathrm{Rb}4{D}_{5/2}$ state are twice as accurate as previous work with thermal atoms using a femtosecond laser comb and the values of $A$ and $B$ for the $^{85}\mathrm{Rb}4{D}_{5/2}$ state are 3 times and 25 times more accurate than previous work in laser-cooled atoms using Fabry--P\'erot interferometer, respectively. According to this high precision of the hfs constants and the previously measured nuclear $g$ factors of the two isotopes, the value of the $d$-electron hyperfine anomaly $^{87}\mathrm{\ensuremath{\Delta}}{}^{85}(4{D}_{5/2})$ is derived to be \ensuremath{-}0.0041 \ifmmode\pm\else\textpm\fi{} 0.0009.

In this paper, we presented a theoretical method for studying the behavior of magnetic field intensity and eddy current inside a magnetostriction based bi-layered composite. Firstly, the mathematical model for the electromagnetic field in the composite was established. Then, the governing equation for determining the magnetic field intensity and eddy current was solved. Furthermore, the effect of the composite’s conductivity on the magnetic field intensity and eddy current were discussed. Lastly, by comparing with the well known R.L. Stoll’s equation, the magnetic field intensity calculated based on our equation showed a less than 0.5% error.

The narrow electromagnetically-induced transparency (EIT) resonance peaks are observed with two low-power counter-propagating diode lasers in cesium (Cs) 6S 1/2 - 6P 1/2 - 8S 1/2 ladder-type atomic system. To precisely determine the centers of resonance peaks, multiple background-free EIT signals are achieved using a novel scanning scheme in which the coupling laser driving Cs 6P 1/2 - 8S 1/2 transition is scanned and the probe laser driving Cs 6S 1/2 – 6P 1/2 is frequency locked. A temperature-stabilized fiber-pigtailed waveguide-type phase electro-optical modulator (EOM) and a stable confocal Fabry-Perot cavity are used as a precise frequency marker to measure the hyperfine splitting of Cs 8S 1/2 state. The impact of the external magnetic field on the measurement is also investigated. Furthermore, the hyperfine structure constant (here it is the hyperfine magnetic dipole constant, A ) of Cs 8S 1/2 state is determined to be A = 219.06 MHz ± 0.12 MHz based on the measured hyperfine splitting (Δ hfs = 876.24 MHz ± 0.50 MHz).

Time delay due to maturation time, capturing time or other reasons widely exists in biological systems. In this paper, a predator-prey system of Leslie type with diffusion and time delay is studied based on mathematical analysis and numerical simulations. Conditions for both delay induced and diffusion induced Turing instability are obtained by using bifurcation theory. Furthermore, a series of numerical simulations are performed to illustrate the spatial patterns, which reveal the information of density changes of both prey and predator populations. The obtained results show that the interaction between diffusion and time delay may give rise to rich dynamics in ecosystems.

Relay transmission technology is the key technology for communication in the decentralized wireless network. In multi-hop relay transmissions, employing digital fountain code can greatly reduce the transmission of feedback information, improve the transmission efficiency of the network, and decrease the transmission time. In this paper, a relay pairs transmission scheme based on fountain code transmission is proposed. Via relay pairs cooperation and rotated constellation technology, signal space diversity is obtained without reducing the bandwidth efficiency and the transmission performance of the relay chain is improved. Simulations show that the performance of the multi-hop relay pairs transmission scheme based on digital fountain code is further upgraded besides achieving packet diversity and signal space diversity. Meanwhile, packet transmission number and transmission time are both reduced.

Purpose: Radiotherapy is commonly used to treat a variety of solid tumors. However, improvements in the therapeutic ratio for several disease sites are sorely needed, leading us to assess molecularly targeted therapeutics as radiosensitizers. The aim of this study was to assess the wee1 kinase inhibitor, MK-1775, for its ability to radiosensitize human tumor cells. Experimental Design: Human tumor cells derived from lung, breast, and prostate cancers were tested for radiosensitization by MK-1775 using clonogenic survival assays. Both p53 wild-type and p53-defective lines were included. The ability of MK-1775 to abrogate the radiation-induced G2 block, thereby allowing cells harboring DNA lesions to prematurely progress into mitosis, was determined using flow cytometry and detection of γ-H2AX foci. The in vivo efficacy of the combination of MK-1775 and radiation was assessed by tumor growth delay experiments using a human lung cancer cell line growing as a xenograft tumor in nude mice. Results: Clonogenic survival analyses indicated that nanomolar concentrations of MK-1775 radiosensitized p53-defective human lung, breast, and prostate cancer cells but not similar lines with wild-type p53. Consistent with its ability to radiosensitize, MK-1775 abrogated the radiation-induced G2 block in p53-defective cells but not in p53 wild-type lines. MK-1775 also significantly enhanced the antitumor efficacy of radiation in vivo as shown in tumor growth delay studies, again for p53-defective tumors. Conclusions: These results indicate that p53-defective human tumor cells are significantly radiosensitized by the potent and selective wee1 kinase inhibitor, MK-1775, in both the in vitro and in vivo settings. Taken together, our findings strongly support the clinical evaluation of MK-1775 in combination with radiation. Clin Cancer Res; 17(17); 5638–48. ©2011 AACR.

Two fatal intrinsic flaws of fair-value accounting are found and mathematically proved by this paper. One flaw concerns its non-complete existence, that is, the required fair value may not exist under certain conditions. One direct consequence of the flaw is that a huge fair value trap may be created by fair-value accounting when the fair value does not exist. Another flaw of fair-value accounting is its self-expansion, that is, the fair-value accounting acts as a share price bubble maker based upon the normal net incomes from the operations of listed firms. The bubble may then expand much larger than the original incomes.

This paper proposes a map ontology driven approach to natural language traffic information processing, and also describes its evaluation results Traffic congestion is considered a major urban problem whose solution has long been sought for by engineers and researchers Recently, the idea of gathering traffic information from mobile users via short message service appears promising However, the traffic information is difficult to process to achieve a high accuracy because of its direct, indirect and connotative expressions The proposed map ontology consists of a set of concepts, attributes, relations and constraints on them The map ontology plays two key roles: 1) a basis for natural language traffic information analysis, and 2) a basis for user query analysis In this paper we present the major information processing modules and services for mobile users Experimental results show that the proposed method can improve the traffic information processing accuracy to 93%–95%.

Background/Aims : An adequate model to study liver regeneration in humans is presently unavailable. We explored the feasibility of studying liver regeneration in a genetically similar species to man, the non-human primate Rhesus macaque. Methods : Five animals were studied; two underwent 60% hepatectomy, one underwent 30% hepatectomy, and cholecystectomy alone was performed on two animals. Laparoscopic-guided or open liver biopsies were performed on days 1, 2, 7, 14, 21, 30 and 60 following all surgeries. Liver regeneration was evaluated by measuring Ki-67, proliferating cell nuclear antigen expression and mitotic index, calculating changes in the surface area of the liver remnant and assessing intrahepatic production of cytokines. Results : Significant liver regeneration was induced in the animals that underwent 60% hepatectomy, peaking between days 21–30 postoperatively. Regeneration was minimal in all other animals studied. Cytokine production followed a similar pattern. Maximal liver regeneration correlated with restoration of surface area in the liver remnant. Conclusions : Sixty percent hepatectomy in a non-human primate model induced significant liver regeneration, maximizing 21–30 days following partial hepatectomy, suggesting a significant interspecies difference when compared to a rodent hepatectomy model. A partial hepatectomy model in Rhesus macaques may allow further characterization of liver regeneration in a species closer to humans.

High-sensitivity spectroscopy of caesium's higher excited 8S1/2 state is obtained by a coherent two-photon transition via an intermediate resonance state. The ladder-type atomic system is driven by two counter-propagating low-power diode lasers, the probe laser being tuned to the transition from the ground state to the intermediate state (6S1/2–6P1/2), and the coupling laser to that between the intermediate and the final state (6P1/2–8S1/2). By locking the probe laser and scanning the coupling laser, the electromagnetically induced transparency (EIT) peaks appear in the probe transmission when the coupling laser resonates with each of the hyperfine levels. Compared with conventional EIT, where the signal-to-noise ratio is limited by the absorptive Doppler background, here these narrow-linewidth peaks have no Doppler background. The peak centres are well determined from theoretical fits to the experimental data. To accurately measure the 8S1/2 hyperfine structure splitting, we developed a simple method to eliminate error arising from the nonlinear frequency scanning by employing an optical waveguide phase modulator and a confocal Fabry–Perot cavity. The hyperfine structure constants of the caesium 8S1/2 state are obtained from hyperfine structure splitting measurements. Systematic effects from the ac-Stark and Zeeman shifts are studied. The measured hyperfine magnetic dipole constant A = (219.08 ± 0.12) MHz is consistent with previous results.

We experimentally demonstrate efficient frequency doubling of a telecom 1560 nm distributed feedback diode laser with a 3 cm long MgO:PPLN waveguide with a conversion coefficient of 114%/W. We investigate optical inhomogeneities by measuring the quasi-phase-matching temperature curve. The ~2.7 mW of second-harmonic power at 780 nm is sufficient to detect the Rb D2 features using modulation transfer spectroscopy. The laser frequency is locked to a hyperfine transition of Rb D2 line and typical residual frequency fluctuation of ±86 kHz (rms) is achieved within 30 min. Our experimental scheme can be used for realizing robust, compact, and highly accurate Rb stabilized 1560 nm laser systems for fiber-optic communication applications.

Epithelial-Mesenchymal Transition (EMT) is a key developmental program that is often activated during cancer invasion and metastasis. During EMT, epithelial cells lose epithelial characteristics, such as E-cadherin expression and gain mesenchymal properties, such as vimentin expression. EMT cells have stem cells properties and possess the characteristics of cell motility, invasiveness and chemotherapy resistance and these cancer stem cells may be responsible for mediating tumor metastasis and resistance to cancer treatments. However, very little is known about the role of EMT and cancer stem cells in modulating radiation response of human breast cancer cells. We compared expression levels of E-cadherin and other EMT related markers in ER-a negative (MDA-MB-231 and Hs578t) and ER-a positive (MCF-7) human breast cancer cells. Clonogenic cell survival assays showed that the cell lines expressing estrogen receptor (MCF-7) were more sensitive to increasing doses of radiation and had high expression of E-cadherin. In contrast, ER negative cells (MDA-MB-231 and Hs578t) had no detectable expression of E-cadherin and were more radioresistant. We transfected MDA-MB-231 and Hs578t cells with a CDH1-expression vector and isolated stable clones. These clones were selected and tested for radiosensitivity. MDA-MB-231 and Hs578t cells transfected with a control vector (pCMV) served as controls. Restoring E-cadherin expression radiosensitized the cells compared to the control vector cell line, suggesting that restoration of E-cadherin expression in mesenchymal-like cells produces a radiosensitizing effect. Our preliminary data demonstrates that EMT, detected as the loss of E-cadherin expression, may regulate tumor cell radiosensitivity, i.e. cells that have undergone EMT are relatively radioresistant compared to the lines that have retained the epithelial phenotype, which are relatively radiosensitive. Thus, there was a general correlation between EMT, based on loss of E-cadherin expression, and radioresistance. Overall, our results suggest that E-cadherin interacts with radiation and enhances the radioresponse of human breast cancer cells. Since it has been demonstrated that the process of EMT contributes to drug resistance and results in cells with CSC-like characteristics, we compared ALDH1 expression in ER positive (MCF-7) and ER negative (MDA-MB-231 and Hs578t) cell lines. Our data shows that ALDH1 expression correlates with the ER status of the breast cancer cells, with a higher number of ALDH1+ cells in ER negative compared to ER positive cell lines. Our preliminary investigation leads us to believe that potentially resistant breast cancer stem cell populations appear to be overrepresented in ER negative breast cancer cell lines. Our observation concurs with clinical data that ER negative cancers are resistant to radiation therapy compared to ER positive breast cancers. Citation Format: Anupama Munshi, Meghna Mehta, Yuhui Yuan, Huifeng Liu, Raymond E. Meyn, Rajagopal Ramesh. EMT and cancer stem cells: role in radiation resistance of breast cancer. [abstract]. In: Proceedings of the 104th Annual Meeting of the American Association for Cancer Research; 2013 Apr 6-10; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2013;73(8 Suppl):Abstract nr 290. doi:10.1158/1538-7445.AM2013-290

Keshen gas field is located in the southern foothill of Mount Tianshan, Western China. Administratively it belongs to Baicheng County, a poor and remote county. This county is composed of 20 ethnic groups, who have their own cultures and languages, which pose difficulties for project management. With a series of initiatives for cooperating with the local government and communities, a yearly natural gas productivity of 5 billion cubic meters were established within five years. A series of measures were taken to win the support of local government. A 108-kilometer long highway was constructed in the mountainous area and shared with local communities. A pipeline network was established to transmit natural gas from Keshen gas field to the suburban areas of Baicheng and other remote places, which changed the local main fuel from firewood into clean natural gas. We hired local people, trained them and gave them decent salaries. More than 2,000 job opportunities were provided to local ethnic minorities, which accounts for 18.5% of the total workers in this project. Thanks to the initiatives we have taken, a harmonious development mode was established in Keshen gas field. It was put into production within five year's construction. The average productivity of a single well is more than 500 thousand cubic meters. The total amount of taxes as well as the GDP of Baicheng County was twice as before. The southern Xinjiang pipeline network encircles half of the Tarim Basin. 41 towns along the pipeline and 4 million people are benefiting from the natural gas produced from Keshen gas field. In return, the local government and communities provided a lot of conveniences for the project crew. The government released several restrictions on seismic exploration and pipeline construction. Since the project crews were mostly from urban areas, the local residents also help us to recognize risks and formulate risk-reducing practices for conducting engineering work in the Gobi and desert area. We also instructed the local residents to do business with Keshen development project, including selling of construction and living materials, renting of equipment, transport vehicles, etc. This initiative also helped to reduce unemployment rate and benefit the project management as well. Keshen gas field is one of the most complicated reservoir in China, not only because of the ultra-deep HPHT reservoirs, but also because of the complicated social environment. A win-win cooperation mode between the Oilfield Company and local communities has been established after a series of initiatives. This set a solid foundation for the sustainable development of Keshen gas field and also set an example for the development of reservoirs in remote areas.

This paper provides field scale EOR survey in China which is in line with biennial worldwide EOR survey published by Oil& Gas Journal (OGJ). The EOR progress in China is not available due to language difference and other reasons in OGJ EOR survey. From 2018, EOR survey in China will be published biennially. The first part of this survey mainly focuses on basic information. Chemical flooding, unconventional heavy oil, green recovery and natural gas recovery progress in China will be surveyed and discussed in detail in the other four parts elsewhere. The EOR projects including field tests and field applications in China are summarized in the same pattern as OGJ to the largest extent for better readership outside China. Most data is collected from published journal papers and reports. Different from other countries, there are only four major oil companies in China: CNPC, SINOPEC, CNOOC and Yanchang Oil. The 28 branch companies of these four companies are both operator and owners. Oil and gas production from CNOOC is all offshore. CNPC is the largest oil company in China and its oil production in 2016 accounts for 54% oil production in China. EOR survey in China includes chemical flooding (polymer, SP and ASP flooding, gas flooding (CO2, nitrogen and air), thermal production, MEOR, and foam flooding. EOR production in China in 2016 accounts for 18% total oil production, while chemical EOR accounts for 10 %. Up to present, there has been more than 34 ASP flooding projects in China, most in Daqing. The total ASP oil production in 2016 is 407 million tons. More than 30 SP flooding projects have been carried out, with incremental oil recovery factor of 7%-18% OOIP. More than 170 polymer flooding projects have been carried out. Polymer flooding has been used widely in Daqing, Shengli, Xinjiang, Liaohe, He'nan and Bohai. The incremental oil recovery from polymer flooding and ASP flooding is 7%-15% and 18%-30% OOIP respectively. Gas flooding in China is not as successful as chemical EOR. Polymer flooding production in the largest offshore oilfield in CNOOC accounts for 25% total oil production in 2016. While EOR production in China accounts for 15%-18% in recent years, however, the world EOR oil production only accounts for about 3.3% total oil production. EOR is greatly affected by oil price, as indicated from 26 years EOR content change in America. It is the first time that detailed EOR survey in China in line with worldwide EOR survey in OGJ is given. The EOR survey in China provides valuable and helpful information for engineers and researchers in oil and gas industry.