激光与^60Co—γ射线对花生的诱变效应研究

Ｈｅ－Ｎｅ，ＣＯ２和ＹＡＧ激光对花生幼苗期的生长有刺激作用，但＾６０Ｃｏ－γ射线对花生幼苗期的生长有一定的抑制作用．Ｈｅ－Ｎｅ和ＣＯ２激光处理的Ｌ１植株总果数 饱果数均比对照增多，但Ｎ２激光和＾６０Ｃｏ－γ射线处理的Ｌ１值株的总果数和饱果数均比对照减少。     

激光与~（60）Co－γ射线对花生的诱变效应研究

Ｈｅ－Ｎｅ、ＣＯ２和ＹＡＧ激光对花生幼苗期的生长有刺激作用，但６０Ｃｏ－γ射线对花生幼苗期的生长有一定的抑制作用；Ｈｅ－Ｎｅ和ＣＯ２激光处理的Ｌ１植株总果数和饱果数均比对照增多，但Ｎ２激光和６０Ｃｏ－γ射线处理的Ｌ１值株的总果数和饱果数均比对照减少；Ｈｅ－Ｎｅ、Ｎ２、ＣＯ２激光和６０Ｃｏ－γ射线能诱发花生根尖细胞染色体畸变，且畸变率随辐照剂量的增大而上升；Ｈｅ－Ｎｅ、Ｎ２、ＣＯ２激光和６０Ｃｏ－γ射线所诱发花生的变异性状是可以向继代遗传的。     

He－Ne激光抗肿瘤作用的实验研究

本文采用２４ｍＷＨｅ－Ｎｅ激光器照射Ｓ＿（１８０）实体瘤小鼠及胃癌移植瘤鼠脾区，观测激光对肿瘤形成的影响。结果表明，激光照射组小鼠瘤块明显小于非激光照射组，组间比较差异有非常显著性（Ｐ＜０．０１）。由此证明，Ｈｅ－Ｎｅ激光照射脾区具有抗肿瘤作用。     

低能量He—Ne激光血管内照射对血脂的影响

应用低能量Ｈｅ—Ｎｅ激光血管内照射外周循环血液，结果显示：与对照组相比较，Ｔ—Ｇ差异显著（Ｐ＜０．００５），Ｔ—ｃｈ与ＨＤＬ—ｃｈ差异非常显著（Ｐ＜０．０１—０．００５）．说明低能量Ｈｅ—Ｎｅ激光血管内照射，可遏制高脂血症及心脑血管病等的发生。     

He－Ne激光在外科伤口的应用

Ｈｅ－Ｎｅ激光在外科伤口的应用孙英信（重庆医科大学第一医院）１９９４年２月～６月，我科应用Ｈｅ－Ｎｅ激光对手术后的伤口、窦道进行了激光治疗，取得了满意的效果，现介绍如下：１一般资料本组共治疗３０例患者，均为经手术治疗的住院病人，其中男性１３例，女性１...     

304．He－Ne激光器1．15μm输出的若干问题

３０４．Ｈｅ－Ｎｅ激光器１．１５μｍ输出的若干问题陆治国，刘琳（西北大学７１００６９）杨成龙（中国工程物理研究院流体物理研究所７１０００３）本文主要介绍了Ｈｅ－Ｎｅ１．１５μｍ激光器设计中的一些主要问题。我们采用平凹谐振腔，平面透射率２．５％，凹面Ｒ...     

氦氖激光血管内照射78例脑血管病疗效观察

低能量Ｈｅ－Ｎｅ激光静脉血管内照射治疗脑血管疾病７８例，三疗程观察，总有效率达８８．５％，无效１１．５％。     

He—Ne激光对家兔血脂影响的实验研究

本实验采用Ｈｅ－Ｎｅ激光对高血脂家兔心前区进行照射，研究激光辐射对其血脂的影响。结果表明：激光照射后血清低密度脂蛋白胆固醇（ＬＤＬ－Ｃｈ）和总胆固醇（Ｔ－Ｃｈ）均有显著下降，高密度脂蛋白胆固醇（ＨＤＬ－Ｃｈ）无明显变化，为临床上激光治疗高脂血症及其并发症（如心脑血管疾病等）提供了理论依据。     

He─Ne激光对某些细菌的作用及其假设

通过实验发现，Ｈｅ－Ｎｅ激光照射某些细菌后，血浆凝固酶凝固时间延长，耐药性下降，并且对第２代以至第４代细菌产生同样的影响。Ｈｅ－Ｎｅ激光对某些细菌确有作用。     

He－Ne激光治疗痛经50例疗效观察

本文报道５０例痛经，采用Ｈｅ－Ｎｅ激光穴位照射，痊愈３０例，占６０％；显效１１例，占２２％，有效６例，占１２％；总有效率为９４％．     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Curved crystal spectrometer for the measurement of X-ray lines from laser-produced plasmas

In order to diagnose the laser-produced plasmas, a focusing curved crystal spectrometer has been developed for measuring the X-ray lines radiated from a laser-produced plasmas. The design is based on the fact that the ray emitted from a source located at one focus of an ellipse will converge on the other focus by the reflection of the elliptical surface. The focal length and the eccentricity of the ellipse are 1350 mm and 0.9586, respectively. The spectrometer can be used to measure the X- ray lines in the wavelength range of 0.2-0.37 nm, and a LiF crystal （200） （2d = 0.4027 nm） is used as dispersive element covering Bragg angle from 30° to 67.5°. The spectrometer was tested on Shengnang- Ⅱ which can deliver laser energy of 60-80 J/pulse and the laser wavelength is 0.35 μm. Photographs of spectra including the 1 s2p ^1P1-1s^2 ^1S0 resonance line（w）, the 1s2p ^3P2-1s^2 1S0 magnetic quadrupole line（x）, the 1s2p ^3P1-1 s^2 ^1S0 intercombination lines（y）, the 1 s2p ^3S~1-1 s^2 ^1S0 forbidden line（z） in helium-like Ti Ⅹ Ⅺ and the 1 s2s2p ^2P3/2-1 s622s ^2S1/2 line（q） in lithium-like Ti Ⅹ Ⅹhave been recorded with a X-ray CCD camera. The experimental result shows that the wavelength resolution（λ/△ 2） is above 1000 and the elliptical crystal spectrometer is suitable for X-ray spectroscopy.     

Preparation and Characterization of TaN ALD Precursors

High purity organic-tantalum precursors for thin film ALD TaN were synthesized and characterized.Vapor pressure and thermal stability of these precursors were studied.From the vapor pressure analysis,it was found that TBTEMT has a higher vapor pressure than any other published liquid TaN precursor,including TBTDET,TAITMATA,and IPTDET.Thermal stability of the alkyl groups on the precursors was investigated using a 1H NMR technique.The results indicated that the tertbutylimino group is the most stable group on TBTDET and TBTEMT as compared to the dialkylamido groups.Thermal stability of TaN precursors decreased in the following order:TBTDET ＞ PDMAT ＞ TBTEMT.In conclusion,precursor vapor pressure and thermal stability were tuned by making slight variations in the ligand sphere around the metal center.     

Electronic Structure of Semiconductor Nanocrystals

This paper reviews our recent development of the use of the large-scale pseudopotential method to calculate the electronic structure of semiconductor nanocrystals, such as quantum dots and wires, which often contain tens of thousands of atoms. The calculated size-dependent exciton energies and absorption spectra of quantum dots and wires are in good agreement with experiments. We show that the electronic structure of a nanocrystal can be tuned not only by its size,but also by its shape. Finally,we show that defect properties in quantum dots can be significantly different from those in bulk semiconductors.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks