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浅谈油气管道工程施工与高原生态环境保护对策

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油气田地面工程 2024年第3期43卷 58-63页

作者：曲智超张世彬李雷刘来中国石油天然气管道工程有限公司

在油气管道工程施工过程中,管沟开挖通常是重要的工序之一,其损毁原有土壤结构,易造成水土流失,土地复垦难度大,影响地表植被持续生长,破坏生态环境稳定。国家对边疆偏远地区经济发展和社会民生非常重视,能源通道建设必不可少,尤其是在... 详细信息

在油气管道工程施工过程中,管沟开挖通常是重要的工序之一,其损毁原有土壤结构,易造成水土流失,土地复垦难度大,影响地表植被持续生长,破坏生态环境稳定。国家对边疆偏远地区经济发展和社会民生非常重视,能源通道建设必不可少,尤其是在青藏高原实施工程建设,满足工程施工的同时,更需要采取严格且有效的技术措施以保护生态环境。在占用草原时,采取适宜的植被保护和恢复技术;穿越河流时,采取有效的技术防范和补救措施;通过环境敏感区及保护区时,采取有效的防渗技术措施;穿越多年冻土区时,采取相应的缓冷保温措施。实践证明,工程施工过程中同步实施并逐步完善相应的技术措施,能够最大限度地降低对生态环境的破坏,最大程度地利于地区环境的可持续发展,在项目建设与生态保护之间发生矛盾和冲突时,力争寻找平衡,实现共赢,维护青藏高原地区生态环境稳定。

关键词：管道施工青藏高原生态环境生态保护

Fabrication of NiTi Shape Memory Alloys with Graded Porosity to Imitate Human Long-bone Structure

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Journal of Bionic Engineering 2015年第4期12卷 575-582页

作者： Dan Zhou Yan Gao Ming lai Hao Li Bin Yuan Min Zhu School of Materials Science and Engineering South China University of Technology Guangzhou 510641 China

Replacement of damaged long bones is still a significant challenge in surgery. In the present study, a NiTi Shape Memory Alloy （SMA） constructed with graded porosity imitating human long bone structure was fabricated via a dedicated moulding procedure. The outer layer （porosity 14 %） and inner layer （porosity 52 %） of the bone-like graded NiTi alloy were found to be co-axial very well with the interface with a good metallurgical bonding. Moreover, the compression strength and elastic modulus of the graded-porosity NiTi SMAs were found to be 360.6 MPa and 6.7 GPa, respectively, which have been improved by its coaxiality compared with the one with poor coaxiality. The graded-porosity NiTi SMAs exhibit resembling mechanical performance as human long-bones, and are considered to be better implant candidates for long bone replacement.

关键词： NiTi SMA graded porosity long bone structure compressive strength recoverable strain

α-2-HS-glycoprotein is a potential marker predicting hepatitis B e antigen seroconversion in patients with chronic hepatitis B during treatment with pegylated interferon alfa-2b

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Science China(Life Sciences) 2011年第1期54卷 39-47页

作者： MA Hui WANG JiangHua GUO Fang WEI lai Peking University People's Hospital Peking University Hepatology Institute Beijing 100044 China

The efficacy of interferon (IFN) is limited in about 1/3 of patients with chronic hepatitis B (CHB). We used two-dimensional electrophoresis (2-DE)-based proteomic strategies to identify potential serum markers predicting hepatitis B e antigen (HBeAg) seroconversion in these patients during IFN therapy. Two groups of patients were enrolled: training and validation. In the training group, 2-DE experiments and subsequent identification of altered levels of proteins showed that α-2-HS-glycoprotein, leucine-rich α-2-glycoprotein, and haptoglobin were significantly upregulated as compared with baseline levels in the HBeAg seroconversion group, whereas apolipoprotein C-III precursor, leucine-rich α-2-glycoprotein, and α-albumin were downregulated in the non-seroconversion group. For patients with HBeAg seroconversion in the training group, Western blot analyses showed that α-2-HS-glycoprotein levels in 75% of patients were significantly upregulated at the end of the treatment as compared with baseline levels. Subsequent experiments in the validation group showed that α-2-HS-glycoprotein levels were significantly increased at week 4 in 83.33% of patients in the HBeAg seroconversion group. Dynamic changes in the serum level of α-2-HS-glycoprotein may be a potential early marker for predicting HBeAg seroconversion during IFN treatment for CHB.

关键词： α-2-HS-glycoprotein pegylated interferon alfa-2b chronic hepatitis B

Penetration of a Single Domain of Bacillus thuringiensis Cry1Ie-Domain I to a Lipid Membrane In vitro

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Journal of Integrative Agriculture 2014年第5期13卷 1043-1050页

作者： GUO Shu-yuan LI Jie CHEN Zhen HE Kang-lai School of Life Science Beijing Institute of Technology State Key Laboratory for Biology of Plant Diseases and Insect Pests/Institute of Plant Protection Chinese Academy of Agricultural Sciences

Domain I of the activated Crystal protein from Bacillus thuringiensis has a seven a-helix bundle structure, which is responsible for membrane channel formation in its insecticidal mechanism. Crylle is toxic to Asian corn borer, Ostrinia furnacalis （Guen6e）, and plays important roles in insect biological control. The domain I from Crylle has been expressed and purified in its normal conformation, as embedded in the full length homologous toxin structure. The membrane insertion ability of this single domain was compared with the full length homologous toxin using a monolayer insertion experiment. The results indicated that the Crylle-domain I had the ability to insert into the lipid monolayer, and this ability is greater than that of the IE648 toxin. However, the state of insertion is not stable and remains for only a short period of time. The Crylle-domain I plays no role in receptor binding as it had a nonspecific binding with the brush border membrane vesicles of the Asian corn borer.

关键词： Bacillus thuringiensis Cryl Ie domain I of Cry protein monolayer insertion

Application of Gaussian Weight to Improve Perturbation Features of Convection-Permitting Ensemble Forecast Based on Local Breeding of Growing Modes

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Journal of Meteorological Research 2021年第3期35卷 490-504页

作者： Kun LI Chaohui CHEN Hongrang HE ru YANG Yi LI Yongqiang JIANG College of Meteorology and Oceanography National University of Defense TechnologyChangsha 410073 PLA Troop 95112 Foshan 528000

Local breeding of growing modes(LBGM)is a method used to generate initial condition perturbation(ICP)for convection-permitting ensemble *** weights(EWs)are usually presumed in LBGM during the localization of ICP,without considering different contributions of the grid points within the local *** address this problem,Gaussian weights(GWs)are proposed in this study,which can accommodate the varied influences of the grids inside the local radius on the central grid through a Gaussian ***,two convection-permitting ensemble forecast experiments based on LBGM with GWs and EWs are compared and analyzed respectively for two squall line *** results showed that the use of the GWs intensified the local characteristics of the ICP and made the distribution of the ICP fields more *** energy spectrum of the ICP indicated that there could be more large-scale information in the ICP by using the *** addition,mesoscale information also improved *** forecast of nonprecipitation variables,GWs improved the relationship between the root-mean-square error and the spread and contributed to the forecasting accuracy of wind,temperature,geopotential height,and *** the precipitation forecast,GWs simulated the precipitation structure successfully and provided better probability forecasting during the evolution of the two squall line processes than the EWs.

关键词： local breeding of growing modes(LBGM) convection-permitting ensemble Gaussian weight(GW) initial condition perturbation(ICP)

Symmetric-key cryptosystem with DNA technology

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Science in China(Series F) 2007年第3期50卷 324-333页

作者： LU MingXin lai XueJia XIAO GuoZhen QIN Lei Department of Information Management Nanjing UniversityNanjing 210093China State Key Lab of Information Security Institute of Software of Chinese Academy of ScienceBeijing 100049China Department of Computer Science&Engineer Shanghai Jiao Tong UniversityShanghai 200030China State Key Lab of ISN Xidian UniversityXi’an 710071China Cancer Research Institute Queen’s UniversityKingstonOntarioK7L3N6Canada

DNA cryptography is a new field which has emerged with progress in the research of DNA computing. In our study, a symmetric-key cryptosystem was designed by applying a modern DNA biotechnology, microarray, into cryptographic technologies. This is referred to as DNA symmetric-key cryptosystem (DNASC). In DNASC, both encryption and decryption keys are formed by DNA probes, while its ciphertext is embedded in a specially designed DNA chip (microarray). The security of this system is mainly rooted in difficult biology processes and problems, rather than conventional computing technology, thus it is unaffected by changes from the attack of the coming quantum computer. The encryption process is a fabrication of a specially designed DNA chip and the decryption process is the DNA hybridization. In DNASC, billions of DNA probes are hybridized and identified at the same time, thus the decryption process is conducted in a massive, parallel way. The great potential in vast parallelism computation and the extraordinary information density of DNA are displayed in DNASC to some degree.

关键词： symmetric-key encryption DNA cryptography DNA computing

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基于谐波特征的电能计量误差与计费成本分析

电子技术（上海） 2024年第1期53卷 314-316页

作者：徐宏伟王宇赖劲舟贵州电网有限责任公司计量中心贵州550002 贵州电网有限责任公司电力科学研究院贵州550002 贵阳供电局贵州550002

阐述电能表检定管理系统的应用策略,采用试验验证的方式,分析谐波对电能计量影响,有效地保证试验效率和精确度,并提出一种科学合理的计费方式。为减小谐波对电能计量影响,应实施对谐波抑制、对谐波监测与管理、选用先进设备和计量方法,... 详细信息

阐述电能表检定管理系统的应用策略,采用试验验证的方式,分析谐波对电能计量影响,有效地保证试验效率和精确度,并提出一种科学合理的计费方式。为减小谐波对电能计量影响,应实施对谐波抑制、对谐波监测与管理、选用先进设备和计量方法,提出建设性建议。

关键词：谐波电能计量电能表计量误差计费成本

Energy harvester array using piezoelectric circular diaphragm for rail vibration

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Acta Mechanica Sinica 2014年第6期30卷 884-888页

作者： Wei Wang Rong-Jin Huang Chuan-Jun Huang lai-Feng Li State Key Laboratory of Technologies in Space Cryogenic Propellants Technical Institute of Physics and ChemistryChinese Academy of Sciences

Generating electric energy from mechanical vibration using a piezoelectric circular membrane array is presented in this *** electrical characteristics of the functional array consisted of three plates with varies tip masses are examined under dynamic *** an optimal load resistor of 11 k,an output power of 21.4 m W was generated from the array in parallel connection at 150 Hz under a pre-stress of 0.8 N and a vibration acceleration of9.8 m/***,the broadband energy harvesting using this array still can be realized with different tip *** obvious output power peaks can be obtained in a frequency spectra of 110 Hz to 260 *** results show that using a piezoelectric circular diaphragm array can increase significantly the output of energy compared with the use of a single *** by optimizing combination of tip masses with piezoelectric elements in array,the frequency range can be tuned to meet the broadband *** array may possibly be exploited to design the energy harvesting for practical applications such as future high speed rail.

关键词： Energy harvesting Array Piezoelectric material Rail vibration

载药微球子宫动脉化疗栓塞治疗局部晚期宫颈癌病理完全缓解患者一例

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中华介入放射学电子杂志 2024年第2期12卷 190-192页

作者：吕丽爱赖林强张登科温州医科大学附属第五医院麻醉科浙江丽水323000 温州医科大学附属第五医院肿瘤中心浙江丽水323000

宫颈癌是女性最常见的恶性肿瘤之一[1]。目前,2018年国际妇产科协会(Federation International of Gynecology and Obstetrics,FIGO)分期标准为ⅠB3期和ⅡA2期的宫颈癌患者的最佳治疗选择仍存在争议[2];手术和(或)术后辅助放疗,术前新... 详细信息

宫颈癌是女性最常见的恶性肿瘤之一[1]。目前,2018年国际妇产科协会(Federation International of Gynecology and Obstetrics,FIGO)分期标准为ⅠB3期和ⅡA2期的宫颈癌患者的最佳治疗选择仍存在争议[2];手术和(或)术后辅助放疗,术前新辅助化疗和(或)术后辅助放疗,以及同步放化疗是主要的治疗方法[3]。部分患者无法耐受术前放化疗或放化疗效果不佳,子宫动脉化疗栓塞术可短期使肿瘤坏死,具有副作用小、住院时间短等特点,为局部晚期宫颈癌术前新辅助治疗提供了新的选择[4]。

关键词：载药微球宫颈癌经动脉化疗栓塞术