[en] Methanol is a promising alternative fuel for the spark-ignition engines. This paper experimentally investigated the performance of a hydrogen-blended methanol engine at lean and various load conditions. The test was conducted on a four-cylinder commercial spark-ignition engine equipped with an electronically controlled hydrogen port injection system. The test was conducted under a typical city driving speed of 1400 rpm and a constant excess air ratio of 1.20. Two hydrogen volume fractions in the intake of 0 and 3% were adopted to investigate the effect of hydrogen addition on combustion and emissions performance of the methanol engine. The test results showed that brake thermal efficiency was improved after the hydrogen addition. When manifolds absolute pressure increased from about 38 to 83 kPa, brake thermal efficiencies after the hydrogen addition were increased by 6.5% and 4.2%. The addition of hydrogen availed shortening flame development and propagation periods. The peak cylinder temperature was raised whereas cylinder temperature at the exhaust valve opening was decreased after the hydrogen addition. The addition of hydrogen contributed to the dropped hydrocarbon and carbon monoxide. However, nitrogen oxides were slightly raised after the hydrogen enrichment. - Highlights: • Load characteristics of a H₂-blended methanol engine are experimentally studied. • H₂ addition is more effective on raising engine efficiency at low loads. • Flame development and propagation periods are shortened after H₂ addition. • H₂ enrichment contributes to the smooth operation of the methanol engine. • HC and CO emissions from the methanol engine are reduced after H₂ addition

[en] A new valid method of stress categorization-'primary-least structure method' (PLSM) is proposed. The method is based on the stress-linearized technique and elastic finite element analyses (FEA). During the classification, the primary stresses (P_m + P_b) are evaluated in the 'primary least structure', while other stresses (P_L + Q + F) in the original structure. By removing the 'ruinous constrains' from the original structure, the lower primary stress is extracted, from which the greater allowable pressure approaching the lower-bound limit load can be obtained. An example is presented to demonstrate the application of the 'primary-least structure' method as a stress categorization tool. The result shows that a higher allowable pressure can be obtained by this method, compared with the procedure without stress-linearized technique and the approach given by present Code

[en] The preparation process of nuclear fuel produced large amount of fluorine and ammonia- containing radiate waste water. Treatment situation for this radiate waste water is that fluoride removal is relatively mature technique, But for the ammonia removal and recycling documents have not been reported. For the fluorine and ammonia-containing waste water whose Ammonia content is about 20 ∼ 30 g/L in this producing project, use slightly positive pressure distillation process in turbulent ball tower for recovering gas absorber's circular fluid to ammonia secondary absorption. Study the impact of the stream flow of heating section, temperature on top of turbulent ball tower, stream flow of balancing segment, feed temperature and flow and circulating absorption liquid flow of absorption tower to removal and recovery process. Through theoretical analysis and experiment to determine the optimum process parameters and operating conditions: steam flow of balancing segment/feed flow: 2.5; temperature on top of turbulent ball tower: 75 ∼ 80 ℃; circulating absorption liquid flow: 3000 L/h. Under these parameters and conditions, the removal rate of ammonia is about 80% ∼ 85%, the recovery rate of ammonia is about.63% ∼ 66%, both are relatively stable. (authors)

[en] CO_2 (Carbon dioxide) dilution is a feasible way for controlling NOx (Nitrogen oxides) emissions and loads of the internal combustion engines. This paper investigated the effect of CO_2 dilution on the combustion and emissions characteristics of a hydrogen-enriched gasoline engine. The experiment was conducted on a 1.6 L spark-ignition engine with electronically controlled hydrogen and gasoline injection systems. At two hydrogen volume fractions of 0 and 3%, the CO_2 volume fraction in the intake was gradually increased from 0 to 4%. The fuel-air mixtures were kept at the stoichiometric. The experimental results demonstrated that brake mean effective pressure of the gasoline engine was quickly reduced after adopting CO_2 dilution. Comparatively, Bmep (Brake mean effective pressure) of the 3% hydrogen-enriched engine was gently decreased with the increase of CO_2 dilution level. Thermal efficiency of the 3% hydrogen-enriched gasoline engine was raised under properly increased CO_2 dilution levels. However, thermal efficiency of the pure gasoline engine was generally dropped after the CO_2 dilution. The addition of hydrogen could shorten flame development and propagation durations under CO_2 diluent conditions for the gasoline engine. Increasing CO_2 fraction in the intake caused the dropped NOx and raised HC (Hydrocarbon) emissions. Increasing hydrogen fraction in the intake could effectively reduce HC emissions under CO_2 diluent conditions. - Highlights: • CO_2 dilution reduces cooling loss and NOx of H_2-enriched gasoline engines. • H_2-blended gasoline engine gains better efficiency after CO_2 dilution. • CoVimep of H_2-blended gasoline engine is kept at low level after CO_2 addition. • CO_2 dilution has small effect on reducing Bmep of H_2-blended gasoline engine.

[en] Based on the 1 : 50000 regional geological survey in the area of Tuotuo River (145E009024, 145E010024, 146E009001, 146E010001), we knew that the intrusive body development is poor, the lithology is mainly for granite diorite porphyry, and is the discovered intrusive body for the first time. By means of the LACIPMS zircon U-Pb dating research of the granite diorite porphyry, there are 14 zircon spots were analysed, 10 results of them are in concord with the ²⁰⁷Pb/²³⁵U-²⁰⁶Pb/²³⁸U trendline. Their ²⁰⁶Pb/²³⁸U ages are from 36 Ma to 42 Ma, and the weighted average age is 38.58 ± 0.87 Ma. Its regarded that this age can represent the formation age of the intrusive mass. According to regional geological condition, it is conclude that the intrusion mass is formed in the Eocene. (authors)

[en] The speed of unit is drop quickly from 99 Hz to 80 Hz in 2 seconds, When the Pulse Generator powers to HL-2A fusion experimental device. It leads to rectifier power net voltage frequency is also variable and There are a lot of harmonics and reactive power on the side of the power net, which is difficult to obtain the synchronization signal accurately. Therefore it is essential to get accurate phase lock signal. In this paper, zero-crossing comparison method and synchronous coordinate system method are studied. The synchronous coordinate system method is adopted to obtain the synchronous signal through analysis and comparison. In order to obtain a good phase-locked loop, it is necessary to optimize and improve the phase-locked loop for the adverse electrical energy environment at the side of the pulsed generator network. In order to solve the problem of phase lock when the frequency of fundamental wave changes, the Phase Lock Loop in synchronous coordinate system is theoretically analyzed and improved. Based on the simulation model, the output voltage of the impulse generator is used as the signal to verify the phase-locking technology. (authors)

[en] Highlights: • Sulfide activates sqr transcription against respiratory toxicity in Urechis unicinctus. • Sulfide increases expressions and activities of NF1, Sp1 and HSF1 in a time-dependent manner. • NF1 and Sp1 participate in both basal and early sulfide-induced sqr transcription. • HSF1 functions more significantly than NF1 and Sp1 in sulfide-induced sqr transcription. • Transcription factors NF1, Sp1 and HSF1 enhance sqr promoter activity synergistically. - Abstract: Background: Sulfide is a well-known environmental toxic substance. Mitochondrial sulfide oxidation is a main mechanism of sulfide detoxification in organisms, and sulfide: quinone oxidoreductase (SQR) is a key enzyme which is involved in transferring electrons from sulfide to ubiquinone and converting sulfide into thiosulfate. Previous studies have revealed the SQR-mediated mitochondrial sulfide oxidation exists in the echiuran worm Urechis unicinctus, and its sqr mRNA level increased significantly when the worm is exposed to sulfide. In this study, we attempt to reveal the synergistic regulation of transcription factors on sulfide-induced sqr transcription in U. unicinctus. Methods: ChIP and EMSA were used to identify the interactions between sqr proximal promoter (from −391 to +194 bp) and transcription factors NF1 (nuclear factor 1) and Sp1 (specificity protein 1). Site-directed mutation and transfection assays further revealed their binding sites and synergistic roles of HSF1, NF1 and Sp1 in the sqr transcription. When U. unicinctus were exposed to 150 μM sulfide, the expression levels and nuclear contents of NF1 and Sp1 were examined by Western blotting, and the binding contents between NF1 or Sp1 and the sqr promoter were also detected by ChIP. Results: Transcription factors NF1 and Sp1 were confirmed to interact with the sqr proximal promoter, and their binding sites were identified in −75 to −69 bp for NF1 and −210 to −201 bp for Sp1. Transfection assays showed mutation of NF1 or Sp1 binding site significantly decreased the sqr promoter activity by 50% or 73%, respectively. Moreover, we demonstrated three transcription factors NF1, Sp1 and HSF1 enhanced synergistically the activity of sqr transcription. Furthermore, contents of NF1 or Sp1 binding to the sqr proximal region increased significantly in the hindgut when the worms were exposed to 150 μM sulfide. Similar changes of NF1 or Sp1 levels and nuclear NF1 or Sp1 levels were also presented. Conclusion: Transcription factors NF1, Sp1 and HSF1 are all involved in sulfide-induced sqr transcription. Sulfide can activate sqr transcription by not only increasing their expression levels, but also promoting them entering nucleus and binding to the sqr promoter. NF1 and Sp1 participate in both basal and sulfide-induced sqr transcription, while HSF1 functions mainly in sulfide-induced sqr transcription.

[en] Evaluation of the complete decay scheme and data for "1"2"5Sb/"1"2"5"mTe decay to nuclear levels in "1"2"5Te is presented in this report; literature data available up to June 2015 are included. The Limitation of Relative Statistical Weight Method (LRSW) was applied to average numbers throughout the evaluation. The uncertainty assigned to the average value was always greater than or equal to the smallest uncertainty of the values used to calculate the average. The half-life has been determined to be 1007.4±0.3 days. All known measured γ-ray absolute or relative intensities have been examined; the γ-ray emission probability of the reference γ-ray line of 427.874 keV is recommended to be 29.54±0.10%. The theoretical internal conversion coefficients and their uncertainties were used to obtain the complete decay scheme intensity balance. The values of other decay characteristics were calculated using the ENSDF analysis program. Finally the updated decay scheme for "1"2"5Sb is presented.

[en] CS power supply need to do local debugging experiment before operating in tokamak device and physical experiment, therefore, to design a set of self-check control system is particularly necessary. At the same time, as self-checking debugging control system run independently of the central control system, there is a need to distinguish the priority between self-check control system and central control system, to avoid data conflict situations. Using the powerful and flexible LabVIEW development tool to create reliable real-time solution, this paper firstly completed the construction of the hardware control system including the selection of chassis, controller, and the board, on the basis of the program of PC software, and RT is designed, through experimental verification, system stability, high reliability, can satisfy the requirement of CS power supply self-checking debugging. (authors)

[en] To evaluate the resolution and pole figure window of neutron texture diffractometer at China Advanced Research Reactor (CARR), the expressions of resolution and pole figure window were concluded based on the error analysis of diffraction geometry in reciprocal space and then applied to CARR neutron texture diffractometer. The results show that the pole figure window approximates to elongated rectangle. Its β resolution is very high and α resolution varies largely with diffraction angle. For specific diffraction angle, α resolution is fixed for ³He tube detector. While, for two-dimensional position sensitive detector it can be adjusted according to the materials and texture distribution by vertically dividing the detector into pieces. (authors)