浅谈对电梯检验的认识

分析了电梯的控制系统及安全部件在检验中的注意事项以及澄清电梯检验中容易混淆的概念。     

工业园区规划理念与功能布局研究

通过对临汾段店工业园区控制性详细规划设计理念和功能布局的论述,提出以中、高技术产业为主,集科、工、贸于一体,多功能、综合性的现代化、花园式的城市功能区是工业园区发展的方向。     

A small difference in nuclear mass could make a big impact in the cosmos

In a recent paper [1] published in Physical Review Letters, scientists at the Institute of Modern Physics, Chinese Academy of Sciences, have reported their first results from the Cooler Storage Ring at the Heavy Ion Research Facility, a newly-constructed major scientific facility in Lanzhou, China. As a part of an international collaboration including colleagues from Europe, USA and Japan, they were able to identify in experiments the very     

大学生人文教育的认识与实践

弘扬人文精神,强化人文教育,提高大学生人文素质是社会主义精神文明建设和发展社会主义先进文化的需要;是培养新世纪高质量人才的需要;是新时期建立健全完整的价值观体系的需要。考察和分析中国大学人文教育的现状,可以看出强化人文教育的现实必要性和迫切性。其途径主要有:贯穿以人为本的发展主线;改革教学内容和课程体系;提高教师的人文素质;积极营造良好的校园文化氛围;注重学生的社会实践。     

Analysis of fragrance composition in three cultivars of <Emphasis Type="Italic">Osmanthus fragrans</Emphasis> Albus group flower by gas chromatography-mass spectrometry

With supercritical CO2 fluid extraction(SCFE), essential oil was extracted from three cultivars of Xianning osmanthus. The fresh osmanthus flower was processed with a petroleum ether digestion method to produce the extractum. The yields of essential oil and extractum were 0.19 % and 0.13 % (m/m) respectively. The essential oil and fragrance composition and content extracted were analyzed with gas chromatography-mass spectrometer (GC-MS). The result showed that essential oil contained 36.99%(area/total area) of ionone, ionol and 13.11% of linalool; ionone and ionol contained in extractum were as high as up to 33.33%, while linalool up to 21.92%. Whether essential oil or extractum contains only about 40% fat acid and other ester matters. None of environmental estrogen (phthalic ester) was found in fragrance ingredients. The result also showed that the quality of O. fragrans Albus group fragrance in Xianning is better than that produced in Hangzhou and Anhui districts.     

论新时期藏族女性作家对女性救赎之路的探寻

新时期以来,藏族女性作家在广阔的文化视野和多元文化语境下对本民族传统文化进行审视,她们以细腻的笔触描写了新时期藏族女性经历的种种政治、文化冲突,并以各自独特的方式去展现本民族女性的生存状况,表现藏族女性的情感与精神方面的痛苦与困惑,完成了对本民族女性生存境遇的书写。同时,藏族女性作家以深沉的宗教情怀关照藏族女性的生命形态和生存境遇,展现情爱救赎之路的破灭,并以寓于文本中的宗教救赎之路为藏族女性提供了一种走出困境的可能性。     

新疆乌鲁木齐市绿地景观生态服务功能综合评价

以相关统计年鉴及覆盖新疆乌鲁木齐市主城区的ETM+遥感影像数据为基础,利用多边形综合指标法并建立相对差异度计算公式,对绿地生态服务功能进行综合分析评价.结果表明,乌鲁木齐市主城区中,除新市区绿地生态服务功能一般外,其他区均较差,相对生态服务功能西部优于东部,北部优于南部,西北部最佳.籍此研究优化乌鲁木齐市绿地景观结构,提升绿地系统生态价值,保护区域生态环境和绿地景观多样性,促进区域可持续发展.     

Image forgery detection using segmentation and swarm intelligent algorithm

Small or smooth cloned regions are difficult to be detected in image copy-move forgery (CMF) detection. Aiming at this problem, an effective method based on image segmentation and swarm intelligent (SI) algorithm is proposed. This method segments image into small nonoverlapping blocks. A calculation of smooth degree is given for each block. Test image is segmented into independent layers according to the smooth degree. SI algorithm is applied in finding the optimal detection parameters for each layer. These parameters are used to detect each layer by scale invariant features transform (SIFT)-based scheme, which can locate a mass of keypoints. The experimental results prove the good performance of the proposed method, which is effective to identify the CMF image with small or smooth cloned region.     

Cobalt doped titanate nanotubes: Synthesis and properties

Cobalt oxide doped titanate nanotubes are synthesized with a simple hydrothermal treatment of mixed Co_3O_4 and TiO_2 powders. The formed tubular nanostructure, chemical composition,and the elemental distribution are analyzed using TEM, BET, FTIR, XRD, and XPS. The electrocatalytic activity towards oxygen evolution reactions and photodegradation against Rhodamine B are investigated. It has been found out that the oxygen evolutions starts at 0.8 V and reaches 0.98 mA ·cm~(–1) at 1.4 V vs. SCE. For photodegradation of Rhodamine B, the concentration decreased to 24% after 1 h irradiation using the sample with a mass percentage of 5% cobalt. The results demonstrate that the cobalt oxide doped titanate nanotubes are good candidates as electrocatalysts and photocatalytic materials.     

Secure pairing with wearable devices by using ambient sound and light

Wearable devices usually work together with smart phones. To ensure only legitimate smart phones can read the data, they must conduct pairing to establish a shared key. Traditional pairing methods require that the pairing devices have a keyboard or screen for user interaction. However, due to the size limitation, keyboards or screens are hard to be installed in the wearable devices. To solve this problem, we propose a novel pairing method by using ambient sound and light. In this new scheme, any pairing request from smart phone will trigger wearable device vibration. Only after users press the confirm key on the device can the pairing process continues. Then pairing devices collect ambient sound and light at the predetermined time and establish a shared key by using the Diffie-Hellman protocol. To protect against potential man-in-the-middle attacks in the key establishment process, an improved interlock protocol with sound and light comparison is conducted to authenticate the key. If both the sound and light collected by the pairing devices are similar enough, the key is accepted. Otherwise, it is rejected. Compared with current context based pairing methods, our scheme does not impose strict synchronization on devices to collect ambient context data. Moreover, our scheme need not collect and exchange contextual information for multiple times to resist offline brute force attacks. The experimental results and security analysis prove the effectiveness of our scheme.