Four new species of the Genera Eudesme and Sphaerotrichia (Chordariaceae, Heterokontophyta) from the Chinese Coast

Four new species, Eudesme huanghaiensis Ding et Lu, E. qingdaoensis Ding et Lu, E. shandongensis Ding et Lu and Sphaerotrichia huanghaiensis Ding et Lu, from the western Yellow Sea coast of China are described. Eudesme huanghaiensis is mainly characterized by its spherical or sub-spherical sub-cortical cells, its rhizoidal filaments developing from the basal cells of sub-cortex and its broad sub-cortical and medullary layers. E. qingdaoensis is mainly characterized by its long medullary cells, generally hollow center of the medulla, short sub-cortex with only 3-4 cylindrical cells and long, slender and clavate terminal cells of the rhizoidal filaments. E. shandongensis is mainly characterized by its hollow frond, thick cell walls of both medulla and inner sub-cortical layers and the spherical terminal cells of the rhizoid filaments. Sphaerotrichia huanghaiensis is mainly characterized by its cylindrical, sparsely branched frond with acute angle, and its thick 5-6 layered sub-cortex with long assimilating filaments of 6-10 cells.

Studies on Chinese species of Gelidiella and Pterocladiella (Gelidiales, Rhodophyta)

A detailed study of materials from our herbarium shows the presence of two species of Gelidiella and three species of Pterocladiella, including two new records and a new species. Previously recorded species include G. acerosa and P. capillacea. G. bornetii and P. caerulescens are new records for China and P. yinggehaiensis is believed to be a new species. This new species is characterized by its small thalli, 1.5-2 cm high, that are more densely branched on the middle to upper parts for one half their lengths. These characteristics are so distinctive that they can be used to separate this species readily from other species now reported in this genus.

A review of the genus Apocepon Nierstrasz & Brender a Brandis (Isopoda : Epicaridea : Bopyridae) parasitic on purse crabs (Decapoda : Brachyura : Leucosiidae) from Chinese waters, with description of a new species

Description of a new species Apocepon leucosiae sp. nov. of genus Apocepon Nierstrasz & Brender a Brandis, 1930 from Chinese waters, a redescription of Apocepon pulcher Nierstrasz & Brender a Brandis, 1930 from the type locality and the second record of Apocepon digitatum Stock, 1959 are presented. All hosts are in the brachyuran family Leucosiidae. Four purse crab species, i.e. Philyra carinata Bell, Philyra heterograna Ortmann, Leucosia sinica Shen et Chen and Leucosia anatum ( Herbst), are recorded for the first time as hosts of parasitic isopods of this genus. A brief differential diagnosis, data on the distribution and a key to the three species in the genus Apocepon are provided.

New records of Paraprionospio (Annelida: Spionidae) from Chinese waters, with the description of a new species

Paraprionospio pinnata (Ehlers, 1901), a poorly known and potentially cosmopolitan polychaete, was examined from museum specimens and from collections in Jiaozhou Bay, the Yellow Sea. New observations indicate that previous Chinese records of P. pinnata are doubtful, and that Chinese waters contain at least three valid species of Paraprionospio, two are known and one is new. Paraprionospio inaequibranchia (Caullery, 1914) and Paraprionospio coora Wilson, 1990, previously misidentified as P. pinnata, are reported from Chinese waters for the first time. Paraprionospio crist'ata. new species, is characterized by having brown pigment patches on the prostomium, ventral crests on chaetigers 9 and 10, dorsal crests on the middle part of the body (from chaetigers 21-23, not beyond chaetiger 29). thin filaments on chaetiger 3, and bifoliate branchial lamellae.

Genetic improvement on Chinese shrimp (Fenneropenaeus chinensis): growth and viability performance in F1 hybrids of different populations

Fenneropenaeus chinensis distributed in the Yellow Sea and Bohai Sea of China and the west coast of the Korean Peninsula. Different geographical populations represent potentially different genetic resources. To learn further the characteristics of different geographical population, crosses among two wild and three farmed populations were produced. The two wild populations were from the Yellow Sea and Bohai Sea (WYP), and the west coast of the Korean Peninsula and coast (WKN). The three farmed populations included the offspring of first generation of wild shrimp from coast in Korea (FKN), the Huang Hai (the Yellow Sea in Chinese) No.1 (HH1), and JK98. The phenotypes growth and survival rates of these populations were compared to confirm the feasibility for crossbreeding. The body length (BL), carapace length (CL), carapace width (CW), height of the second and third abdominal segment (HST), width of the second and third abdominal segment (WST), length of the first abdominal segment (LF), length of the last abdominal segment (LL), live body weight (BW), and survival rate were measured. Different combinations were statistically performed with ANOVA and Duncan's Multiple Range Test. The results show that the survival rate of JK98(a (TM) Euro)xWKN(a (TM),) was the highest, followed by WYP(a (TM) Euro)xWKN(a (TM),), FKN(a (TM) Euro)xWYP(a (TM),), FKN(a (TM) Euro)xHH1(a (TM),) and WYP(a (TM) Euro)xFKN(a (TM),); the body weight of FKN(a (TM) Euro)sxHH1(a (TM),) was the highest, followed by FKN(a (TM) Euro)xWYP(a (TM),), WYP(a (TM) Euro)xWKN(a (TM),), WYP(a (TM) Euro)xFKN(a (TM),) and JK98(a (TM) Euro)xWKN(a (TM),); the total length had the same ranking as the body weight. All growth traits in hybrids JK98(a (TM) Euro)xWKN(a (TM),) were the lowest among all combinations. F1 hybrids had significant difference (P < 0.05) in BL, CL, HST, LL, and BW; and insignificant difference (P > 0.05) in other growth traits and survival rate. The results of Duncan's Multiple Range Test are that BL and CL of JK98(a (TM) Euro)xWKN(a (TM),) were significantly different from the other combinations; HST different from the combination of FKN(a (TM) Euro)xWYP(a (TM),), FKN(a (TM) Euro)xHH1(a (TM),) and WYP(a (TM) Euro)xWKN(a (TM),); and BW different from FKN(a (TM) Euro)xWYP(a (TM),) and FKN(a (TM) Euro)xHH1(a (TM),). As a whole, the results indicate that the FKN(a (TM) Euro)xHH1(a (TM),) was the best combination in all growth traits. Therefore, hybridization can introduce the variation to base populations. The systematic selection program based on additive genetic performance may be more effective than crossbreeding.

CHINESE NITRARIA TANGUTORUM BOBR。： CHEMICAL CONSTITUENTS OF SEED OIL EXTRACTED BY SFE-CO_2

In order to develop and make good use of Nitraria tangutorum Bobr. in Qinghai-Tibetan Plateau for its ecological and medicinal values, the seed oil was extracted by SFE-CQ2 and the chemical constituents was analyzed by GC/MS. The component relative contents were determined by area nomalization. 28 components were separated from the extracts of SFE-CQj and 12 of them, which accounted for 85.99% were identified. They were(Z, Z)-9, 12-octadecadienoic acid (linoleic acid), bicyclo[ 10. 1. 0] tridec-1-ene, 7-pentadecyne, gamma-sitosterol, gamma-tocopherol, 1, -8,Z-10-hexadecatriene,9,12-octadecadienal, 24-methyl-5-cholestene-3-ol,(Z)-9,17-octadecadienal, stigmastan-3,5-dien, eicosane and so on. Among them, the relative content of (Z, Z)-9,12-octadecadienoic acid is the highest, accounting for 65.85% of the total area. It is concluded that N. tangutorum Bobr. seed oil is a rich source of linoleic acid.

Two new names in Chinese Stellaria (Caryophyllaceae)

During preparation of the account of Stellaria L (Caryophyllaceae) for the Flora of China, Volume 6, it was noticed that two names are illegitimate later homonyms: Stellaria arenaria Maximowicz, non Linnaeus, and Stellaria pilosa Franchet, non Dulac. Therefore, the following ne names (nomina nova) are provided here: Stellaria arenarioides Shi L. Chen, Rabeler & Turland and Stellaria pilosoides Shi L. Chen, Rabeler & Turland.

混合模式识别系统研究

讨论基于多种分类方法的模块组合实现的混合模式识别系统，它不同于利用多分类器输出结果表决的集成系统．提出两个系统：一个面向印刷体汉字文本识别，另一个面向自由手写体数字识别．利用多种特征和多种分类方法的组合、部分识别信息控制混淆字判别策略以及提出的动态模板库匹配后处理方法，使系统的性能与传统单一分类器系统比较，获得明显改善．实验表明：多方法多策略混合是解决复杂和增强系统鲁棒性的一条途径

南堡油田测试资料综合评价及试油配套工艺技术研究与应用

A series of significant oil-gas exploration progresses have been achieved in Nanpu depression with 1.02 billion ton oil-gas reserves have been proven. It has been confirmed that Nanpu beach has a geologic condition to be a major field based on exhaustive research. This finding, which is integrated reservoir，great reserves, thick oil layer and high productivity in Nanpu depression, is the most excited success in Chinese oil-gas exploration in recent years. This abundant oilfield found is significant to the strategy of oil production stability in the east of China. Nanpu depression exploration is also a crucial exploration project for Petrochina. Based on the comprehensive research on Nanpu formation testing data, we reevaluate and analyze the reservoir property and the structure characteristics, and propose a series of testing technique that are suitable for Jidong oil field development. The results are summarized as follows: 1. The reservoir parameters and characters are defined by formation test data interpretation and systemic dynamic-static data comparison. 2. Based on sources analysis and statistical research related to formation contaminants, some technique measures, which can not only prevent or reduce invasion damage for different formations but also can effectively improve completion efficiency, are proposed. 3. By selecting the testing pressure drawdown, optimum working regulation and flow /shut-in duration, and adopting dynamic-static flow parameters correlation analysis to predict production, an optimum research on working regulation and flow /shut-in duration was accomplished. Optimization formation test principles suitable for any kinds of Nanpu oilfield are established, which can improve test quality, construction efficiency and data recording quality. 4. By reasonable selection of perforating gun and penetrating charge, the perforation penetration has been improved effectively and the flow channel of the oil gas have been expanded, so that the communication between formations and the wellbore is improved better. 5. One joint working procedure which combining formation test, perforation, unloading and stimulation treatment has become the dominant testing technology in the Nanpu offshore Oilfield. This combination technique can implement several procedures using one pipe string, and achieve rapid testing purpose.

塔里木盆地历史时期的自然环境演变

Exploit Tarim Basin Historical Physical Geographic Information System by linking historical documents and Geographic Information System, reconstruct the physical environmental evolution in Tarirn Basin during historical period (the last 2 Ka), special discuss riverhead of the Yellow River and Lop Nur. Based on analyzing Chinese historical documents (antiquity maps and texts), extract physical environmental information in Xiyu during historical period from Twenty-Five History and geographic books and records past dynasties, divide it into 4 period of time. Regarding digital topographical maps as base maps and looking on water bodies, vegetation and desert as central factors, quantify historical physical geographic data in Geographic Information System in terms of dynastic combination of Xianqin-Han, Jin-Wei-Nanbeichao, Tang-Wudai and Song-Yuan-Ming-Qing, execute physical environmental maps of Xiyu through the ages, in order to image the changes of water system, oasis and desert in Xiyu during the last 2 Ka. Compare cross orientation the relation of environmental factors all historical period of time from the influence of climate to oasis and desert, deem that climate condition decided ecological structure in direct and restrict the extent of desertification, especially climate corresponded the style of oasis and the spread of desert in the period of Jin-Wei-Nanbeichao and Tang-Wudai. Compare portrait direction the physical environmental characters in Xiyu during different period of time from 5 aspects of water bodies, oasis, desert, products and climate, deem that physical environment in Xiyu changed in all aspects during historical period. The origin of Lysenkoism about the Yellow River Undercurrent is agelong, whose ascending and descending at times due to investigating the riverhead of the Yellow River time after time during historical period and researching and disputing about the geographic location of Jishishan Mountain. It could consider the faultage in northeastern Qinghai-Xizang Plateau as the channels of undercurrent according to the research of modern geoscience field in the riverhead region.

企业效率表现和中国环境政策-以造纸企业为例

Understanding relationship between environmental protection and economic development is crucial to form practical environmental policy. At micro level, implementation of environmental regulations often causes production mills adjustment of technology which might leads to change of productive efficiency and cost, which, in turn, determine effort level of mills and even local government in pollution control. Using a stochastic frontier production model and a set of survey data on 126 paper mills from six provinces of China, we measure the technical efficiency changes and analyze the determinants of efficiency. in particular, we examine impact of environmental policy on paper mills' efficiency, using an indicator of environmental policy-the levy ratio of COD. We also estimate a simultaneous-equation model in which the levy rate and emission are jointly determined. The results indicate that there have been efficiency improvements during 1999-2003, when enforcement of environmental regulations have been tightened. The impacts, nevertheless, are different for different types of mills. We also find the levy ratio, which is influenced by both the local social and economic conditions and the characters of paper mills, such as scale, has strong impact on the abatement of the pollutant-COD. Additionally, paper mills' technical efficiency has positive effect on the reduction of the emission intensity of the pollutant-COD. These results lead a set of implications pertinent to policy improvement.