C波段平面异向介质设计及其后向波特性验证

提出了一种工作在C波段的新型平面结构异向介质，它除了带宽宽和损耗小外，还具有体积小、结构简单的优点，而且能够实现工作频段的平移，频率平移范围为4—20 GHz.基于电磁波由自由空间入射半无限大异向介质平板的传输和反射数据，计算出了电波在其中传播时的相速随频率的变化曲线，结果表明所讨论的异向介质确实在预想的频段上表现出后向波特性；同时利用相位观察法进一步验证了上述的后向波特性，从而肯定了异向介质的存在. 关键词： 异向介质 宽频带 小单元 后向波特性     

日本细菌战罪行研究与口述史料

口述史料是根据个人亲身经历或见闻而口传或笔记的材料。细菌战口述史料是指与（日本）细菌战有关联的口传史料、回忆录、调查记录和访谈录。目前，日本细菌战口述史料搜集与整理的理论与方法相对薄弱、滞后，因此，研究者要有意识地、主动地、脚踏实地地投身到口述史料的采访、收集、整理与研究中去，利用历史学的基本理论与方法探求口述历史、口述史料的基本理论与方法。     

BW膨胀止水条和G型防水堵漏剂在地下防水工程中的应用

采用ＢＷ膨胀止水条解决地下防水中施工缝的抗涌难以及Ｇ型防水堵漏剂和有机防水材料复合做法在地下室工程中的应用技术。     

Polymerization of molecular (yellow) arsenic

DTA studies were performed to investigate the polymerization of molecular (yellow) arsenic (y-As), in the dark and also under illumination/irradiation. The semiempirical quantum chemical CNDO/BW method for calculating the dimerization reaction pathway of two As₄ molecules was applied, and showed that the stability of y-As decreases, due to the formation of stable fragments of the polymeric phase (a-As). Using the principle of orbital symmetry conservation, it was shown that polymerization takes place most favourably from a staggered “face-to-face” configuration of As₄ molecules. Dark polymerization proceeds under activation. For a result of the initial stage of polymerization, CNDO/BW simulation predicts the formation of an As₈ dimer. The molecular cluster As₈ of D_2h symmetry forms a six-membered chairshaped ring which constitutes one of the dominating units in the polymeric phase (a-As).     

日军细菌战“特别输送”实证调查的几点结论

根据日军七三一部队“特别输送”档案进行的实证调查证明：在中国民间，特别是黑龙江、山东两省，存在日军细菌战“特别输送”罪行的大量人证物证，这证明日军细菌部队在细菌实验中杀害的中国人的数量巨大，其中以黑龙江省受害最为严重。侵华日军驻各地的基层宪兵队猖狂进行细菌战“特别输送”活动，其“特移送”报告是细菌战“特别输送”的充足罪证；其“特别输送“活动几乎成为公开的秘密。被“特别输送”者大多数是中国抗日志士，他们的家庭因此遭受惨痛的创伤，啜饮无尽的悲剧。     

Polymerization of molecular (yellow) arsenic

DTA studies were performed to investigate the polymerization of molecular (yellow) arsenic (y-As), in the dark and also under illumination/irradiation. The semiempirical quantum chemical CNDO/BW method for calculating the dimerization reaction pathway of two As₄ molecules was applied, and showed that the stability of y-As decreases, due to the formation of stable fragments of the polymeric phase (a-As). Using the principle of orbital symmetry conservation, it was shown that polymerization takes place most favourably from a staggered “face-to-face” configuration of As₄ molecules. Dark polymerization proceeds under activation. For a result of the initial stage of polymerization, CNDO/BW simulation predicts the formation of an As₈ dimer. The molecular cluster As₈ of D_2h symmetry forms a six-membered chairshaped ring which constitutes one of the dominating units in the polymeric phase (a-As).     

H5BW12O40 as a green and efficient homogeneous but recyclable catalyst in the synthesis of 4H‐Pyrans via multicomponent reaction

Keggin‐type heteropolyacid, H₅BW₁₂O₄₀ (BWA) with a higher negative charge and stronger Brønsted acidity comparing to Si and P derivatives was used as an efficient, green, and reusable catalyst in a three‐component reaction involving the cyclocondensation of various β‐dicarbonyl compounds, differently substituted aromatic aldehydes and malononitrile in EtOH/H₂O for the facile, clean, and high yielding synthesis of 4H‐pyrans. All reactions were completed in short times and the products were obtained in good to excellent yields. The reaction medium could be recycled and reused several times without any loss of efficiency.     

细菌战诉讼案的意义与启示

细菌战诉讼案大致经历了准备阶段、起诉阶段、一审阶段、二审阶段、三审阶段，其结果以败诉告终。这场诉讼虽然败诉了，但它仍然具有重大的现实意义和深远的历史意义：锁定了侵华日军实施细菌战的罪行；推动了人们对侵华日军细菌战罪行的调查和学术研究；激发了广大群众的爱国热情；扩大了社会影响，引起了世界关注。细菌战诉讼案告诉人们：和平是全世界人民的共同愿望，战争罪行终究逃不过历史的惩罚；对日索赔与中、日友好并不矛盾；抢救历史刻不容缓；把爱国热情化为实际行动，把祖国建设得更加强大。     

Hydrogen bonding patterns in 3,5-diamino-6-aryl triazines

The crystal structure of two related 1,2,4-triazine derivatives, C₉H₇N₅Cl₂·H₂O (1) and C₁₂H₁₄N₅Cl₂⁺·CH₃SO₃⁻·H₂O (2) that have different biological effects, have been determined. Lamotrigine (Lamictal, 1) is a novel anticonvulsant and BWA256C (2) is a class 1 antiarrythmic drug. The dihedral angles between the least-squares planes of almost exactly planar phenyl and triazine rings are 76.42(6) and 76.08(6)°, for compounds 1 and 2, respectively. In 2, protonation takes place at the iminium nitrogen atom, thus suggesting the importance of resonance through the triazine ring. This resonance is also confirmed by the pattern of bond lengths and angles. Extensive networks of hydrogen bonds, in which all molecular species are involved, rule the crystal packing in both compounds. The analysis of hydrogen bond networks in other 3,5-diamino-6-aryl derivatives suggests that there is a strong influence of co-crystallizing solvent molecule on the nature of resulting hydrogen bond topology.     

Osmotic backwash mechanism of reverse osmosis membranes

A new osmotic backwash (BW) model for reverse osmosis (RO) membranes was developed for conditions of no applied pressures across the membrane. This analytical model has one adjustable parameter representing the coefficient of a linearized convection term in the general convection–diffusion equation. An experimental RO/BW system was used for 12 data sets to verify the proposed BW model and illustrate its predictability. Results show deviations of the model from the data within a range of 5–15%. The described dilution mechanism of the feed concentration polarization (CP) layer is based on RO originated concentrated layer detachment from the membrane surface followed by its gradual dilution.The understanding gained in this research may be applied to automatic RO/BW cleaning cycles. A dominant RO parameter of the BW process is the RO initial driving force—the concentration difference across the membrane. Other RO process parameters – applied pressure and feed flow rate – have lesser effects. Both theoretical and experimental methods provide quantitative relationships between RO and BW variables that enable an understanding and control of the BW process.