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2-Aryl benzothiazole formation from aryl ketones and 2-aminobenzenethiols under metal- and I(2)-free conditions was described. Various 2-aryl benzothiazoles were selectively obtained in good yields using molecular oxygen as oxidant. DMSO played an important role in this transformation. Functional groups such as methyl, methoxy, fluoro, chloro, bromo and nitro groups were tolerated under the optimized reaction conditions.

Permutation entropy and fractal theory are new methods which are used to study irregularity and nonlinearity of a complex system in nature. Principle of Permutation Entropy (PE) and Correlation Dimension (CD) is introduced in this paper firstly, their differences in describing the complexity of vibration signal were analyzed and the selection methods of algorithm parameters were put forward, then taking the whole life vibration data of a bearing as an example, PE and CD algorithm were applied to detect abnormal characteristics respectively, and their difference on abnormal detection are compared with each other. It is concluded that the result of two detection methods is basically coincident, but PE has advantages in computational efficiency, which is much more suitable for online monitoring and will play an important role in preventive maintenance of mechanical equipments.

Permutation Entropy (PE) is a new subject which talks about the scrambling and non-linearity of complex system, which has been widely studied in recent years. This paper aims to introduce the basic algorithm of PE firstly, then verify PE using simulated signal, which shows that PE is feasible for fault diagnosis. Finally, the whole life vibration data of a rolling bearing is taken as an example, comparing with variation characteristics of mean square value obtained from the vibration signal, it is well proved that the early abnormity character of vibration signal could be successfully detected by the PE early before the fault occurred. The algorithm of PE was very simple and effective for early fault diagnosis, which supported the feasible idea for the on-line fault diagnosis, so this method will play a key role in the predictive maintenance.

Esophageal cancer is one of the most aggressive cancers in the world. Recent large-scale genome-wide association studies (GWAS) reported that functional genetic variations in the phospholipase C epsilon gene (PLCE1) were strongly associated with risk of esophageal squamous cell carcinoma (ESCC) and gastric cardia adenocarcinoma (GCA) in Chinese population. For C20orf54 rs13042395 genotype and risk of esophageal cancer, the results were inconsistent. We conducted a replication case–control study to evaluate the genetic effects of these two functional single nucleotide polymorphisms (SNPs) on the development of esophageal cancer. A total of 380 cases and 380 controls were recruited for this study. The genotypes were determined by matrix assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-ToF MS). The variant alleles of the functional polymorphism, PLCE1 rs2274223 SNP was associated with the increased risk of esophageal cancer [adjusted odds ratio (OR) = 1.95, 95 % confidence interval (CI) = 1.05–3.59 for PLCE1 rs2274223 GG vs. AA]. However, there was no significant association between the C20orf54 rs13042395 genotype and esophageal cancer risk (adjusted OR = 0.99, 95 % CI = 0.63–1.57 for C20orf54 rs13042395 TT vs. CC). Stratified analyses indicated a significantly increased risk of esophageal cancer associated with the PLCE1 rs2274223 AG genotype was more evident among females, younger patients and never drinkers, compared with the PLCE1 rs2274223 AA genotypes. Stratified analyses also indicated a significantly increased risk of esophageal cancer associated with the PLCE1 rs2274223 GG genotype was more evident among never smokers and never drinkers compared with the PLCE1 rs2274223 AA genotypes. These findings indicated that functional polymorphisms PLCE1 rs2274223 might contribute to esophageal cancer susceptibility.

The new high voltage electric energy meter CGDS-12W which integrates the voltage sensor, current sensor and metering device, display unit and remote communication unit together is introduced. The line voltages and currents are converted into micro voltage and current signals (in mV and mA) by the specially designed sensors. The converted signals are fed into a multiplier where a DC voltage signal proportional to the average line power is produced. The DC voltage is converted into a series of pulses by a v/f converter. Then the electric energy is measured by counting the number of pulses in a certain time period. The Changyi Power Administration Bureau (CPAB) installed 12 CGDS-12W equipments in April 2006, and in the mean time 12 conventional electromagnetic meters were also installed aside to make comparison. One year's operation has proved the new equipment's advantages over the conventional meters both in reliability and accuracy. The cost of new equipments is also significantly lower.

The depressed scar and the hypertrophic scar are very common in the abdomen after operation. How to reduce the scar after operation becomes more and more important. The three-dimensional Z-plasty is performed on the abdominal skin & subcutaneous tissue and its effectivity is perfect. It seems that this is a logical treatment of depressed scar or hypertrophic scar in the abdomen.

A convenient method for the synthesis of various substituted phenothiazines from cyclohexanones and 2-aminobenzenethiols using molecular oxygen as hydrogen acceptor in the absence of transition-metals is described. For the first time cyclohexanones were used as coupling partners for the construction of phenothiazines.

A novel method for the formation of 2-arylsulfanylphenols from thiols and cyclohexanones is described. Iodine was used as an effective catalyst for this kind of transformation. Cyclohexanones were used as a phenol source via a dehydrogenation and tautomerization reaction.