保证土地市场理性运行的思考

目前土地招投标拍卖市场出现了非理性和非正常的现象,政府应该在科学、公正及利于国民经济整体发展和符合当地经济发展水平前提下,建立合理、理性的土地招投标拍卖最高价制度,使土地市场更好地为国民经济的发展服务。

Anterior resection for rectal carcinoma-risk factors for anastomotic leaks and strictures

AIM:To determine the incidence and factors responsible for anastomotic leaks and stricture following anterior resection(AR)and its subsequent management.METHODS:Retrospective analysis of data from 108 patients with rectal carcinoma who underwent AR or low anterior resection(LAR)to identify the various preoperative,operative,and post operative factors that might have influence on anastomotic leaks and strictures.RESULTS:There were 68 males and 40 females with an average of 47 years(range 21-75 years).The median distance of the tumor from the anal verge was 8 cm(range 3-15 cm).Sixty(55.6%)patients underwent handsewn anastomosis and 48(44.4%)were stapled.The median operating time was 3.5 h(range2.0-7.5 h).Sixteen(14.6%)patients had an anastomotic leak.Among these,11 patients required reexploration and five were managed expectantly.The anastomotic leak rate was similar in patients with and without diverting stoma(8/60,13.4%with stoma and 8/48;16.7%without stoma).In 15(13.9%)patients,resection margins were positive for malignancy.Ninteen(17.6%)patients developed anastomotic strictures at a median duration of 8 mo(range 3-20 mo).Among these,15 patients were successfully managed with per-anal dilatation.On multivariate analysis,advance age(>60 years)was the only risk factor for anastomotic leak(P=0.004).On the other hand,anastomotic leak(P=0.00),mucin positive tumor(P =0.021),and lower rectal growth(P=0.011)were found as risk factors for the development of an anastomotic stricture.CONCLUSION:Advance age is a risk factor for an anastomotic leak.An anastomotic leak,a mucin-secreting tumor,and lower rectal growth predispose patients to develop anastomotic strictures.

Effects of Managers＇ Self-interest Motivation on Listed Company＇ s Business Performance

In recent years, managers＇ self-interest motivation has been attracting more and more attention from both the academia and practice.Therefore, the ways and depth of managers＇ self-interest motivation influencing listed companies＇ operating performance has become a hot research area with important theoretical and practical significance. Based on the samples of A-share companies listed in Shanghai and Shenzhen stock exchange during 2012-2014. we studied different effects of managers＇ self-interest motivation on listed company＇s business performance under different situations.The innovation of this paper mainly lies in the following two points： on the one hand, we did not adopt the previous research methods which does not distinguish different kinds of company＇s business performance. Therefore, we divided business performance into two types firstly, then we made empirical text of the influences of managers＇ self-interest motivation on business performance by virtue of Hausman Model and drew related conclusions under different situations of operating performance. On the other hand, the index measuring managers＇ self-interest is relatively new.

Effect of Binders on Aromatization Performance of HZSM-5 Catalyst

The effect of different binders on light hydrocarbon aromatization performance of the HZSM-5 catalyst was investigated. Physicochemical properties of the catalysts, such as the specific surface area, pore volume and acidity, etc., were characterized to correlate with their aromatization performance data. The results showed that the pore structure of Al2O3 could significantly affect the catalyst performance. As the accessible pore diameter of the catalyst increased from 8.0 nm to 9.0 nm, the light aromatics yield increased by 2.7 percentage points, while the operating time of the catalyst nearly doubled. In addition, catalysts prepared with SiO2 and aluminum phosphate was more active and stable than that prepared with Al2O3, of which the light aromatics yield enhanced 6---8 percentage points and the rtm length, or seivice eife run length nearly doubled.

Automatic HAZOP analysis method for unsteady operation in chemical based on qualitative simulation and inference

Comparing with continuous production process, unsteady operation process, such as startup and shutdown,tends to abnormal situations due to a large number of operations of operators and dynamic state changes involved. To guarantee a safe operation, process hazard analysis(PHA) is very important to proactively identify the potential safety problems. In the chemical process industry, hazard and operability(HAZOP) analysis is the most widely used method. In this paper, based on proposed qualitative simulation and inference method, an automatic HAZOP analysis method for unsteady operation processes is proposed. Mass transfer and relationships among process variables are expressed by Petri net–directed graph model based fuzzy logic. Operating procedure is expressed according to a formal expression. Possible operation deviations from normal operating procedure are identified by using a group of guidewords. Hazards are identified automatically by qualitative simulation and inference when wrong operation process is performed. The method is validated by a rectification column system.

我国股票市场发展研究

2007年至今,我国股票市场经历了一场快速泡沫化到理性回归再到低迷震荡的过程。2009年春节后,股市持续走高。本文通过对中国股市的总体运行情况进行分析,对中国股市泡沫的适度性做出评估,并剖析了中国股市大幅震荡的成因。最后,结合本次金融危机对我国股市未来的发展趋向进行简单预测并对股市的理性运行提出有效的控制措施。

Facility managers＇ perceptions on building performance assessment

During the operational phase, building performance may decrease in various areas, so that the end users' requirements are no longer met. Consequently, indicators are useful to assess and improve the performance of existing buildings. In this study, we carried out a literature review and organized a focus group with facility management experts to gather and analyze facility managers' perceptions on operational indicators that could be used to assess the performance of buildings. The results revealed that the core indicators used to measure a building's operational performance are related to safety and assets working properly, health and comfort, space functionality,and energy performance. The findings also revealed that these indicators can be obtained from three sources: a)facility managers/operators, who carry out corrective maintenance and perform technical inspections, b) regular users, who report complaints and fill-in satisfaction questionnaires, and c) sporadic users, who also fill-in satisfaction questionnaires. These indicators and their sources can contribute to a better analysis of building performance and the definition of measures to improve performance during the operational phase of a building.